Hot Stamping Technology and Application of Ultra-high Strength Steel Components

doi:10.3901/JME.2023.20.154

Abstract

Abstract: Hot stamping can significantly improve the formability of ultra-high strength steel sheets, reduce deformation resistance and springback, which is an important way to achieve automotive lightweight and key performance. In recent years, hot stamping technology has developed rapidly and the market demand is huge and New hot stamping process and equipment has become a research hotspot in related manufacturing fields. In this work, the thermodynamic coupling deformation-phase transformation mechanism of ultrahigh strength steel members is reviewed from the aspects of deformation law and constitutive model, phase transformation law and model, damage and fracture behavior and criterion. Secondly, the traditional hot stamping, high strength and toughness hot stamping, variable strength hot stamping and other hot stamping forming processes are described and analyzed in detail. Then, according to the characteristics of hot stamping process and actual production demand, the latest development of servo press, hot stamping die, heating equipment and production line are introduced. Finally, according to the situation at home and abroad, such as dual-carbon strategy and artificial intelligence, the demand and development trend of ultra-high strength steel hot stamping industry are prospected.

Key words: ultra-high strength steel components, hot stamping, deformation-phase transformation mechanism, forming process, equipment and production lines

CLC Number:

TG306

SONG Yanli, LIU Yujian, FANG Zhiling, WANG Xiang, LU Jue, HUA Lin, LIU Peng, YAN Jianwen. Hot Stamping Technology and Application of Ultra-high Strength Steel Components[J]. Journal of Mechanical Engineering, 2023, 59(20): 154-178.

References

[1] 节能与新能源汽车技术路线图战略咨询委员会，中国汽车工程学会. 节能与新能源汽车技术路线图[M]. 北京:机械工业出版社，2016. Energy Saving and New Energy Vehicle Technology Roadmap Strategic Advisory Committee，China Society of Automotive Engineering. Energy saving and new energy vehicle technology roadmap [M]. Beijing:China Machine Press，2016.
[2] The World Steel Association. Steel in automotive [EB/OL]. [2023-08-02]. https://worldsteel.org/steel-topics/steel-markets/automotive/.
[3] NORRBOTTENS J. Manufacturing a hardened steel article:Sweden，GB1490535A[P]. 1977-11-02.
[4] STEINBEISS H，SO H，MICHELITSH T，et al. Method for optimizing the cooling design of hot stamping tools [J]. Production Engineering，2007，1(2):149-155.
[5] KARBASIAN H，TEKKAYA A E. A review on hot stamping[J]. Journal of Materials Processing Technology，2010，210(15):2103-2118.
[6] TONG C，RONG Q，YARDLEY V A，et al. Investigation of deformation behaviour with yield point phenomenon in cold-rolled medium-Mn steel under hot stamping conditions[J]. Journal of Materials Processing Technology，2022，306:117623.
[7] JING C，YE D，ZHAO J，et al. Effect of hot stamping and quenching & partitioning process on microstructure and mechanical properties of ultra-high strength steel[J]. Materials Research Express，2021，8(3):036506.
[8] ZHANG M，SUN X，WANG Y. Elevated temperature deformation characteristics of 15Mn7 steels[J]. Procedia Manufacturing，2019，37:360-366.
[9] 林建平，王立影，田浩彬，等. 超高强度钢热流变行为[J]. 塑性工程学报，2009，16(2):180-183. LIN Jianping，WANG Liying，TIAN Haobin，et al. Thermal rheological behavior of ultra-high strength steel[J]. Chinese Journal of Plastic Engineering，2009，16(2):180-183.
[10] MERKLEIN M，LECHLER J. Investigation of the thermo-mechanical properties of hot stamping steels[J]. Journal of Materials Processing Technology，2006，177(1-3):452-455.
[11] LI N，SUN C Y，GUO N，et al. Experimental investigation of boron steel at hot stamping conditions[J]. Journal of Materials Processing Technology，2016，228:2-10.
[12] NAKAGAWA Y，MORI K，MAENO T. Springback-free mechanism in hot stamping of ultra-high-strength steel parts and deformation behaviour and quenchability for thin sheet[J]. The International Journal of Advanced Manufacturing Technology，2018，95:459-467.
[13] LU J，SONG Y L，HUA L，et al. Influence of thermal deformation conditions on the microstructure and mechanical properties of boron steel[J]. Materials Science and Engineering A，2017，701:328-337.
[14] 闵峻英，林建平. 金属板材热辅助塑性成形理论[M]. 上海:同济大学出版社，2014. MIN Junying，LIN Jianping. Theory of thermo-assisted plastic forming of metal sheet[M]. Shanghai:Tongji University Press，2014.
[15] AKERSTROM P，BERGMAN G，OLDENBURG M. Numerical implementation of a constitutive model for simulation of hot stamping[J]. Modelling and Simulation in Materials Science and Engineering，2007，15(2):105.
[16] NADERI M，DURRENBERGER L，MOLINARI A，et al. Constitutive relationships for 22MnB5 boron steel deformed isothermally at high temperatures[J]. Materials Science and Engineering A，2008，478(1-2):130-139.
[17] ALEXANDER B，MICHAEL J，MARY A，et al. The influence of martensite，bainite and ferrite on the as-quenched constitutive response of simultaneously quenched and deformed boron steel–Experiments and model[J]. Materials & Design，2014，55:509-525.
[18] HU P，SHI D Y，YING L，et al. The finite element analysis of ductile damage during hot stamping of 22MnB5 steel[J]. Materials& Design，2015，69:141-152.
[19] ZHU B，LIANG W K，GUI Z X，et al. A thermo-plastic-martensite transformation coupled constitutive model for hot stamping[J]. Metallurgical and Materials Transactions A，2017，48(3):1375-1382.
[20] ZHOU J，YANG X M，MU Y H，et al. Numerical simulation and experimental investigation of tailored hot stamping of boron steel by partial heating[J]. Journal of Materials Research and Technology，2021，14:1347-1365.
[21] LU J，HUA L，SONG Y L，et al. Elevated plastic flow behavior of high strength boron steel based on the modified Zerilli–Armstrong model[C]//Advanced High Strength Steel and Press Hardening:Proceedings of the 2nd International Conference (ICHSU2015). 2016:41-46.
[22] LIN J，LIU Y. A set of unified constitutive equations for modelling microstructure evolution in hot deformation[J]. Journal of Materials Processing Technology，2003，143:281-285.
[23] ZHANG R Q，SHI Z S，YARDLEY V A，et al. A CDM-based unified viscoplastic constitutive model of FLCs and FFLCs for boron steel under hot stamping conditions[J]. International Journal of Damage Mechanics，2022，31(9):1373-1395.
[24] 沈玉含. 超高强度钢车身构件热冲压成形与相变机理研究[D]. 武汉:武汉理工大学，2017. SHEN Yuhan. Study on hot stamping forming and phase change mechanism of ultra-high strength steel body components[D]. Wuhan:Wuhan University of Technology，2017.
[25] LI H Y，WEI D D，LI Y H，et al. Application of artificial neural network and constitutive equations to describe the hot compressive behavior of 28CrMnMoV steel[J]. Materials & Design，2012，35:557-562.
[26] QUAN G，ZHAN Z，WANG T，et al. Modeling the hot tensile flow behaviors at ultra-high-strength steel and construction of three-dimensional continuous interaction space for forming parameters[J]. High Temperature Materials and Processes，2017，36(1):29-43.
[27] MURUGESAN M，YU J H，JUNG K S，et al. Supervised machine learning approach for modeling hot deformation behavior of medium carbon steel[J]. Steel Research International，2023，94(2):2200188.
[28] SALARI S，NADERI M，BLECK W. Constitutive modeling during simultaneous forming and quenching of a boron bearing steel at high temperatures[J]. Journal of Materials Engineering and Performance，2015，24:808-815.
[29] FEI W J，LI H G，LI X，et al. Flow behaviors of 22MnB5 steel at a high temperature[J]. Materials Research Express，2019，6(7):076527.
[30] LUO P，LI X，ZHANG W，et al. The study of phase transformation behaviors for 38MnB5Nb ultra high-strength steel by CCT curves and TTT curves[J]. Metals，2023，13(2):190.
[31] LIU S，LONG M，AI S，et al. Evolution of phase transition and mechanical properties of ultra-high strength hot-stamped steel during quenching process[J]. Metals，2020，10(1):138.
[32] MIN J，LIN J，LI F. On the ferrite and bainite transformation in isothermally deformed 22MnB5 steels[J]. Materials Science and Engineering A，2012，550:375-387.
[33] NIKRAVESH M，NADERI M，AKBARI G H，et al. Phase transformations in a simulated hot stamping process of the boron bearing steel[J]. Materials & Design，2015，84:18-24.
[34] SHEN Y，SONG Y，HUA L，et al. Influence of plastic deformation on martensitic transformation during hot stamping of complex structure auto parts[J]. Journal of Materials Engineering and Performance，2017，26:1830-1838.
[35] MORI K，BARIANI P F，BEHRENS B A，et al. Hot stamping of ultra-high strength steel parts[J]. Cirp Annals，2017，66(2):755-777.
[36] Koistinen D P，Marburger R E. A general equation prescribing the extent of the austenite-martensite transformation in pure iron-carbon alloys and plain carbon steels[J]. Acta Metallurgica，1959，7(1):59-60.
[37] KIRKALDY J S. Prediction of microstructure and hardenability in low alloy steels[C]//Proceedings of the International Conference on Phase Transformation in Ferrous Alloys，1983. AIME，1983.
[38] BOK H H，CHOI J W，BARLAT F，et al. Thermo-mechanical-metallurgical modeling for hot-press forming in consideration of the prior austenite deformation effect[J]. International Journal of Plasticity，2014，58:154-183.
[39] CHEN X，XIAO N，LI D，et al. The finite element analysis of austenite decomposition during continuous cooling in 22MnB5 steel[J]. Modelling and Simulation in Materials Science and Engineering，2014，22(6):065005.
[40] QUAN G，ZHAN Z，ZHANG L，et al. A study on the multi-phase transformation kinetics of ultra-high-strength steel and application in thermal-mechanical-phase coupling simulation of hot stamping process[J]. Materials Science and Engineering A，2016，673:24-38.
[41] SCHICCHI D S，HUNKEL M. Influence of the parent phase on the bainitic transformation under large stress of manganese-boron steel 22MnB5[J]. Materials Characterization，2019，151:457-469.
[42] LI Y，CHEN Y，LI S. Phase transformation testing and modeling for hot stamping of boron steel considering the effect of the prior austenite deformation[J]. Materials Science and Engineering A，2021，821:141447.
[43] SAMADIAN P，ABEDINI A，BUTCHER C，et al. Microstructure-based modelling of flow and fracture behavior of tailored microstructures of Ductibor® 1000-AS steel[J]. Metals，2022，12(10):1770.
[44] LI X，XIAO L，ZHENG Q，et al. Study on microstructure and properties of tailored hot-stamped U-shaped parts based on temperature field control[J]. Metals，2019，9(5):593.
[45] CHAI Z，LU Q，HU J，et al. Effect of retained austenite on the fracture behavior of a novel press-hardened steel[J]. Journal of Materials Science & Technology，2023，135:34-45.
[46] HABIBI N，ZAREI-HANZAKI A，ABEDI H R. An investigation into the fracture mechanisms of twinning-induced-plasticity steel sheets under various strain paths[J]. Journal of Materials Processing Technology，2015，224:102-116.
[47] BRÜNIG M，GERKE S，HAGENBROCK V. Stress-state-dependence of damage strain rate tensors caused by growth and coalescence of micro-defects[J]. International Journal of Plasticity，2014，63:49-63.
[48] LOU Y S，CHEN L，CLAUSMEYER T，et al. Modeling of ductile fracture from shear to balanced biaxial tension for sheet metals[J]. Int. J. Solids Struct.，2017，112:169-184.
[49] MOHR D，EBNOETHER F. Plasticity and fracture of martensitic boron steel under plane stress conditions[J]. Int. J. Solids Struct.，2009，46:3535-3547.
[50] ELLER T K，GREVE L，ANDRES M T，et al. Plasticity and fracture modeling of quench-hardenable boron steel with tailored properties[J]. Journal of Materials Processing Technology，2014，214(6):1211-1227.
[51] TANG B，WU F，WANG Q，et al. Damage prediction of hot stamped boron steel 22MnB5 with a microscopic motivated ductile fracture criterion:Experiment and simulation[J]. International Journal of Mechanical Sciences，2020，169:105302.
[52] SPEER J G，MATLOCK D K，COOMAN B C，et al. Carbon partitioning into austenite after martensite transformation[J]. Acta Materialia，2003，51(9):2611-2622.
[53] SPEER J G，EDMONDS D V，Rizzo F C，et al. Partitioning of carbon from supersaturated plates of ferrite，with application to steel processing and fundamentals of the bainite transformation[J]. Current Opinion in Solid State and Materials Science，2004，8(3-4):219-237.
[54] CLARKE A J，SPEER J G，MILLER M K，et al. Carbon partitioning to austenite from martensite or bainite during the quench and partition (Q-P) process:A critical assessment[J]. Acta Materialia，2008，56(1):16-22.
[55] SPEER J G，MOOR E，FINDLEY K O，et al. Analysis of microstructure evolution in quenching and partitioning automotive sheet steel[J]. Metallurgical and Materials Transactions A，2011，42:3591-3601.
[56] ZHU B，LIU Z，WANG Y，et al. Application of a model for quenching and partitioning in hot stamping of high-strength steel[J]. Metallurgical and Materials Transactions A，2018，49:1304-1312.
[57] MAGALHÃES C H X M，SILVA P H，AZZI P C，et al. Effect of austenite grain size on phase transformation and Q&P design for a commercial CMnSi steel[J]. Journal of Materials Engineering and Performance，2023:1-15.
[58] HSU T Y. Quenching-partitioning-tempering process for ultra-high strength steel[J]. International Heat Treatment and Surface Engineering，2008，2(2):64-67.
[59] LIU H，LU X，JIN X，et al. Enhanced mechanical properties of a hot stamped advanced high-strength steel treated by quenching and partitioning process[J]. Scripta Materialia，2011，64(8):749-752.
[60] LI G Y，MA M T，MAO X P，et al. New process of hot stamping in combination with QPT treatment for higher strength-ductility auto-parts[C]//Advanced Materials Research. Trans Tech Publications Ltd，2015，1063:223-231.
[61] XU Y，GONG Y，DU H，et al. A newly-designed hot stamping plus non-isothermal Q&P process to improve mechanical properties of commercial QP980 steel[J]. International Journal of Lightweight Materials and Manufacture，2020，3(1):26-35.
[62] ECHEVERRI E A A，NISHIKAWA A S，MASOUMI M，et al. In situ synchrotron X-ray diffraction and microstructural studies on cold and hot stamping combined with quenching & partitioning processing for development of third-generation advanced high strength steels[J]. Metals，2022，12(2):174.
[63] WANG Z，GUO X，DING H，et al. Research on hot stamping-carbon partition-intercritical annealing process of medium manganese steel[J]. Materials，2023，16(2):576.
[64] 金学军，龚煜，韩先洪，等. 先进热成形汽车钢制造与使用的研究现状与展望[J]. 金属学报，2020，56(4):411-428. JIN Xuejun，GONG Yu，HAN Xianhong，et al. Research status and prospect of manufacturing and use of advanced press hardening automotive steel[J]. Acta Metallurgica Sinica，2020，56(4):411-428.
[65] BARDELCIK A，WORSWICK M J，WELLS M A. The influence of martensite，bainite and ferrite on the as-quenched constitutive response of simultaneously quenched and deformed boron steel-Experiments and model[J]. Materials & Design，2014，55:509-525.
[66] SRITHANANAN P，KAEWTATIP P，UTHAISANGSUK V. Micromechanics-based modeling of stress-strain and fracture behavior of heat-treated boron steels for hot stamping process[J]. Materials Science and Engineering A，2016，667:61-76.
[67] GOLLING S，FRÓMETA D，CASELLAS D，et al. Influence of microstructure on the fracture toughness of hot stamped boron steel[J]. Materials Science and Engineering A，2019，743:529-539.
[68] 谢光驹，宋燕利，路珏，等. 基于复相组织精细调控的硼钢高强韧热冲压工艺[J]. 塑性工程学报，2022，29(2):35-46. XIE Guangju，SONG Yanli，LU Jue，et al. High strength and toughness hot stamping process of boron steel based on fine regulation of complex phase structure[J]. Chinese Journal of Plastic Engineering，2022，29(2):35-46.
[69] MERKLEIN M，WIELAND M，LECHNER M，et al. Hot stamping of boron steel sheets with tailored properties:A review[J]. Journal of Materials Processing Technology，2016，228:11-24.
[70] MORI K. Smart hot stamping of ultra-high strength steel parts[J]. Transactions of Nonferrous Metals Society of China，2012，22:496-503.
[71] MORI K，MAENO T，MONGKOLKAJI K. Tailored die quenching of steel parts having strength distribution using bypass resistance heating in hot stamping[J]. Journal of Materials Processing Technology，2013，213(3):508-514.
[72] LANDGREBE D，PUTZ M，SCHIECK F，et al. Towards efficient，interconnected and flexible value chains-examples and innovations from research on production technologies[C]//Proceedings of the 5th International Conference on Accuracy in Forming Technology，Chemnitz，Germany. 2015:10-11.
[73] 周威佳，刘洪伟，叶知春，等. 高强钢分区热冲压U形件梯度性能[J]. 精密成形工程，2016，8(6):44-48. ZHOU Weijia，LIU Hongwei，YE Zhichun，et al. Gradient performance of high-strength steel zoned hot stamped U-shaped parts[J]. Precision Forming Engineering，2016，8(6):44-48.
[74] MU Y，WANG B，ZHOU J，et al. Hot stamping of boron steel using partition heating for tailored properties:experimental trials and numerical analysis[J]. Metallurgical and Materials Transactions A，2017，48:5467-5479.
[75] BAO L，LIU W J，WANG B，et al. Experimental investigation on partition controllable induction heating-hot stamping process of high-strength boron alloyed steel plates with designable temperature patterns[J]. Journal of Materials Research and Technology，2020，9(6):13963-13976.
[76] NIKRAVESH M，NADERI M，AKBARI G H. Influence of hot plastic deformation and cooling rate on martensite and bainite start temperatures in 22MnB5 steel[J]. Materials Science and Engineering A，2012，540:24-29.
[77] 佟莹，高林，张开开，等. 超高强度钢板的梯度控温相变强化模式[J]. 材料导报，2019，33(20):3494-3501. TONG Ying，GAO Lin，ZHANG Kaikai，et al. Gradient temperature control phase change strengthening mode of ultra-high strength steel plate[J]. Materials Reports，2019，33(20):3494-3501.
[78] GEORGE R，BARDELCIK A，WORSWICK M J. Hot forming of boron steels using heated and cooled tooling for tailored properties[J]. Journal of Materials Processing Technology，2012，212(11):2386-2399.
[79] TANG B T，BRUSCHI S，GHIOTTI A，et al. Numerical modelling of the tailored tempering process applied to 22MnB5 sheets[J]. Finite Elements in Analysis and Design，2014，81:69-81.
[80] OMER K，KORTENAAR L，BUTCHER C，et al. Testing of a hot stamped axial crush member with tailored properties-Experiments and models[J]. International Journal of Impact Engineering，2017，103:12-28.
[81] NAKAGAWA Y，MORI K，SUZUKI Y，et al. Tailored tempering without die heating in hot stamping of ultra-high strength steel parts[J]. Materials & Design，2020，192:108704.
[82] MORI K，OKUDA Y. Tailor die quenching in hot stamping for producing ultra-high strength steel formed parts having strength distribution[J]. CIRP Annals，2010，59(1):291-294.
[83] 陈扬，孙正启，张晓欣，等. 热冲压模具温度和贴合状态对22MnB5组织性能的影响[J]. 塑性工程学报，2021，28(9):11-18. CHEN Yang，SUN Zhengqi，ZHANG Xiaoxin，et al. Effect of hot stamping die temperature and bonding state on microstructure properties of 22MnB5[J]. Chinese Journal of Plastic Engineering，2021，28(9):11-18.
[84] ABDOLLAHPOOR A，CHEN X，PEREIRA M P，et al. Sensitivity of the final properties of tailored hot stamping components to the process and material parameters[J]. Journal of Materials Processing Technology，2016，228:125-136.
[85] 华林，刘佳宁，宋燕利. 获得力学性能梯度热冲压零件的方法及模具:中国，CN103521581B[P]. 2015-12-02. HUA Lin，LIU Jianing，SONG Yanli. Method and mold for obtaining mechanical properties gradient hot stamping parts:China，CN103521581B[P]. 2015-12-02.
[86] 刘润泽，宋燕利，刘鹏，等. 基于Gray-Taguchi方法的汽车中立柱强度分布多目标优化设计[J]. 塑性工程学报，2021，28(1):29-37. LIU Runze，SONG Yanli，LIU Peng，et al. Multi-objective optimization design of automobile neutral column strength distribution based on Gray-Taguchi method[J]. Chinese Journal of Plastic Engineering，2021，28(1):29-37.
[87] BEHRENS B A，HÜBNER S，CHUGREEV A，et al. Investigation of masking concepts for influencing the austenitization process during press hardening[J]. Procedia Manufacturing，2018，15:1095-1102.
[88] YING L，GAO T，DAI M，et al. Experimental and numerical investigation on temperature field and tailored mechanical properties distribution of 22MnB5 steel in spray quenching process[J]. Journal of Manufacturing Processes，2020，57:930-956.
[89] KNEZAR K，MANZENREITER T，FADERL J，et al. Formhärten von feuerverzinktem 22MnB5:ein stabiler und reproduzierbarer Prozess[J]. Tagungsband zum，2007，2:131-148. KNEZAR K，MANZENREITER T，FADERL J，et al. Hot stamping of galvanized 22MnB5:a stable and repeatable process[J]. Tagungsband zum，2007，2:131-148.
[90] WANG Z，LIU P，XU Y，et al. Hot stamping of high strength steel with tailored properties by two methods[J]. Procedia Engineering，2014，81:1725-1730.
[91] BOURQUE C，BARDELCIK A，CHIRIAC C，et al. Short cycle tempering of an 1800 MPa grade of press hardening steel[C]//Materials Science and Technology，Portland. 2019:526-533.
[92] GOBINATH R，KUMAR N N，BALACHANDRAN G. Development of a silicon alloyed hardened and tempered ultra high strength Steel[J]. Transactions of the Indian Institute of Metals，2022，75(9):2211-2219.
[93] MUNERA D，PIC A，KHALIL A D，et al. Innovative press hardened steel based laser welded blanks solutions for weight savings and crash safety improvements[J]. SAE International Journal of Materials and Manufacturing，2009，1:472-479.
[94] LIU J，WANG A L，ZHENG Y，et al. Hot stamping of AA6082 tailor welded blanks for automotive applications[J]. Procedia Engineering，2017，207:729-734.
[95] ALMEIDA D T，CLARKE T G R，SOUZA J H C，et al. The effect of laser welding on microstructure and mechanical properties in heavy-gage press hardening steel alloys[J]. Materials Science and Engineering A，2021，821:141341.
[96] XU W L，HUANG Z B，WAN Y H. Research status of advanced hot forming technology[J]. Advanced Materials Research，2015，1063:169-176.
[97] WARRIAN P J，SMITKA M. The changing dynamics of innovation in the auto supply chain[J]. Journal of Business and Economics，2015，6(4):799-821.
[98] 杨雪梅，黄得群，时丕见，等. 22MnB5热成形门环试制工艺及缺陷分析[J]. 锻造与冲压，2021(10):34-36. YANG Xuemei，HUANG Dequn，SHI Pijian，et al. Trial production process and defect analysis of 22MnB5 hot hardening door ring[J]. Forging & Stamping，2021(10):34-36.
[99] SONG Y，HUA L，CHU D，et al. Characterization of the inhomogeneous constitutive properties of laser welding beams by the micro-Vickers hardness test and the rule of mixture[J]. Materials & Design，2012，37(5):19-27.
[100] SONG Y，HUA L，Meng F. Inhomogeneous constructive modeling of laser welded bead based on nanoindentation test[J]. Ironmaking& Steelmaking，2012，39(2):95-103.
[101] SONG Y，HUA L. Influence of inhomogeneous constitutive properties of weld materials on formability of tailor welded blanks[J]. Materials Science and Engineering A，2012，552(8):222-229.
[102] SONG Y L，SHE J L，LU J，et al. Integral hot stamping process of tailor-welded door ring based on the multi-objective optimization genetic algorithm[C]//Proceedings of the 6th International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2022). Springer Nature，2023，2:301.
[103] YUN S，KWON J，CHO W，et al. Performance improvement of hot stamping die for patchwork blank using mixed cooling channel designs with straight and conformal channels[J]. Applied Thermal Engineering，2020，165:114562.
[104] 欧阳潇. A柱补丁板热冲压实验与有限元模拟研究[D]. 长春:吉林大学，2022. OUYANG Xiao. A-pillar patch plate hot stamping experiment and finite element simulation study[D]. Changchun:Jilin University，2022.
[105] LEI C，XING Z，XU W，et al. Hot stamping of patchwork blanks:modelling and experimental investigation[J]. The International Journal of Advanced Manufacturing Technology，2017，92:2609-2617.
[106] 李彦波，徐锋，耿银忠，等. 硼钢A柱补丁板热冲压工艺数值模拟与实验研究[J]. 锻压技术，2020，45(5):100-104. LI Yanbo，XU Feng，GENG Yinzhong，et al. Numerical simulation and experimental study on hot stamping process of boron steel A-pillar patch plate[J]. Forging Technology，2020，45(5):100-104.
[107] YU L，GU X，QIAN L，et al. Application of tailor rolled blanks in optimum design of pure electric vehicle crashworthiness and lightweight[J]. Thin-Walled Structures，2021，161:107410.
[108] KOPP R，WIEDNER C，MEYER A. Flexibly rolled sheet metal and its use in sheet metal forming[J]. Advanced Materials Research，2005，6:81-92.
[109] HAN S，HWANG T，CHOI M，et al. Manufacturing of tailor-rolled blanks with thickness variations in both the longitudinal and latitudinal directions[J]. Journal of Materials Processing Technology，2018，256:172-182.
[110] ZHANG H W，LIU X H，LIU L Z，et al. Study on nonuniform deformation of tailor rolled blank during uniaxial tension[J]. Acta Metallurgica Sinica (English Letters)，2015，28:1198-1204.
[111] YU L，GU X，QIAN L，et al. Application of tailor rolled blanks in optimum design of pure electric vehicle crashworthiness and lightweight[J]. Thin-Walled Structures，2021，161:107410.
[112] 乔子路，王营，文武，等. 浅析我国伺服压力机行业发展现状[J]. 机电产品开发与创新，2022，35(1):71-74. QIAO Zilu，WANG Ying，WEN Wu，et al. Analysis of the development status of servo press industry in China[J]. Electromechanical Product Development and Innovation，2022，35(1):71-74.
[113] 金风明，窦志平，韩新民. 伺服压力机在我国的发展现状[J]. 机电产品开发与创新，2012，25(1):19-21. JIN Fengming，DOU Zhiping，HAN Xinmin. Development status of servo press in China[J]. Electromechanical Product Development and Innovation，2012，25(1):19-21.
[114] LANDGREBE D，RAUTENSTRAUCH A，KUNKE A，et al. The effect of cushion-ram pulsation on hot stamping[C]//AIP Conference Proceedings. AIP Publishing LLC，2016，1769(1):070014.
[115] 樊索. 伺服压力机的传动分析与控制策略研究[D]. 武汉:华中科技大学，2017. FAN Suo. Research on transmission analysis and control strategy of servo press[D]. Wuhan:Huazhong University of Science and Technology，2017.
[116] 莫健华，张正斌，吕言，等. 三角肘杆式伺服压力机传动机构的仿真与优化[J]. 锻压装备与制造技术，2011(1):21-25. MO Jianhua，ZHANG Zhengbin，LÜ Yan，et al. Simulation and optimization of transmission mechanism of triangle toggle servo press[J]. Forging Equipment& Manufacturing Technology，2011(1):21-25.
[117] GE X，ZHU C，JIN Y. Optimization design for a new large-scale eight-link mechanical press[J]. Journal of Mechanical Science and Technology，2014，28:1403-1410.
[118] LI Y，SUN Y，WANG S. Dimensional synthesis for multi-linkage of high-speed mechanical press[J]. Procedia Engineering，2014，81:1639-1644.
[119] HÖBER A，BEHRENS B A，KRIMM R. Development of a design tool for servo-powertrains in forming presses [C]//Production at the Leading Edge of Technology:Proceedings of the 9th Congress of the German Academic Association for Production Technology (WGP)，Springer Berlin Heidelberg，2019:93-101.
[120] 李建，王珍，宋清玉. 重载伺服压力机主传动系统参数标定[J]. 锻压技术，2022，47(12):148-153，160. LI Jian，WANG Zhen，SONG Qingyu. Parameter calibration of main drive system of heavy-duty servo press[J]. Forging Technology，2022，47(12):148-153，160.
[121] 徐道春，吕明青，邵珠峰，等. 基于改进复合三角函数的伺服压力机轨迹规划研究[J]. 农业机械学报，2023，54(2):450-458. XU Daochun，LÜ Mingqing，SHAO Zhufeng，et al. Research on trajectory planning of servo press based on improved composite trigonometric function[J]. Transactions of the Chinese Society for Agricultural Machinery，2023，54(2):450-458.
[122] 胡建国，孙友松，章争荣，等. 机械压力机传动方案设计的发展历程[J]. 锻压技术，2020，45(5):159-167. HU Jianguo，SUN Yousong，ZHANG Zhengrong，et al. Development history of transmission scheme design of mechanical press[J]. Forging Technology，2020，45(5):159-167.
[123] HE J，GAO F，BAI Y J. A two-step calibration methodology of multi-actuated mechanical servo press with parallel topology[J]. Measurement，2013，46(8):2269-2277.
[124] MURATA C，YABE J，ENDOU J，et al. Direct drive digital servo press with high parallel control[C]//9th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes，2013，1567:1016-1019.
[125] 杨真国. 3000吨双伺服驱动肘杆式压力机主传动机构设计与优化[D]. 武汉:武汉理工大学，2023. YANG Zhenguo. Design and optimization of main drive mechanism of 3000 ton double servo drive toggle press[D]. Wuhan:Wuhan University of Technology，2023.
[126] 程寅峰. 3000吨双伺服驱动肘杆式压力机控制系统设计与同步策略研究[D]. 武汉:武汉理工大学，2023. CHENG Yinfeng. Design and synchronization strategy of 3000 ton double servo drive toggle press control system[D]. Wuhan:Wuhan University of Technology，2023.
[127] CHI X，HAN S. Effects of servo tensile test parameters on mechanical properties of medium-Mn steel[J]. Materials，2019，12(22):3793.
[128] HALICIOGLU R，DULGER L C，BOZDANA A T. Improvement of metal forming quality by motion design[J]. Robotics and Computer-Integrated Manufacturing，2018，51:112-120.
[129] YAN H S，CHEN W R. A variable input speed approach for improving the output motion characteristics of watt-type presses[J]. International Journal of Machine Tools and Manufacture，2000，40(5):675-690.
[130] SONG Q Y，GUO B Y，LI J. Drawing motion profile planning and optimizing for heavy servo press[J]. The International Journal of Advanced Manufacturing Technology，2013，69(9):2819-2831.
[131] LI T C，KUO C C，YANG C Y，et al. Influence of motion curve errors of direct-drive servo press on stamping properties[J]. The International Journal of Advanced Manufacturing Technology，2022，120(7-8):4461-4476.
[132] KUO C C，HUANG H L，LI T C，et al. Optimization of the pulsating curve for servo stamping of rectangular cup[J]. Journal of Manufacturing Processes，2020，56:990-1000.
[133] 陈岳云，郭为忠，高峰. 基于NURB曲线的伺服压力机冲压过程建模与加工工艺轨迹规划[J]. 上海交通大学学报，2009，43(1):138-142. CHEN Yueyun，GUO Weizhong，GAO Feng. Stamping process modeling and machining process trajectory planning of servo press based on NURBS curve[J]. Journal of Shanghai Jiao Tong University，2009，43(1):138-142.
[134] 王昆，郭为忠，高峰. 伺服冲压工艺拟NURBS曲线建模的权因子优化调节[J]. 东华大学学报(自然科学版)，2011，37(6):755-760. WANG Kun，GUO Weizhong，GAO Feng. Optimization and adjustment of weight factor for NURBS curve modeling of servo stamping process[J]. Journal of Donghua University (Natural Science Edition)，2011，37(6):755-760.
[135] SONG Y L，DAI D G，GENG P，et al. Formability of aluminum alloy thin-walled cylinder parts by servo hot stamping[J]. Procedia Engineering，2017，207:741-746.
[136] 曹威圣. 基于混合阶次样条曲线模型的超高强钢构件伺服热冲压工艺设计[D].武汉:武汉理工大学，2023. CAO Weisheng. Servo Hot stamping process design of ultra-high strength steel components based on mixed order spline curve model [D]. Wuhan:Wuhan University of Technology，2023.
[137] HOFFMANN H，SO H，STEINBEISS H. Design of hot stamping tools with cooling system[J]. CIRP Annals，2007，56(1):269-272.
[138] LIM W S，CHOI H S，AHN S，et al. Cooling channel design of hot stamping tools for uniform high-strength components in hot stamping process[J]. The International Journal of Advanced Manufacturing Technology，2014，70:1189-1203.
[139] 刘雪飞，李磊，石娟昌，等. 基于性能梯度分布的B柱加强件热冲压模具冷却系统研究[J]. 热加工工艺，2020，49(21):89-95，98. LIU Xuefei，LI Lei，SHI Juanchang，et al. Study on cooling system of hot stamping die for B-pillar reinforcement based on performance gradient distribution[J]. Hot Working Technology，2020，49(21):89-95，98.
[140] 李奇颖，吴博雅，杨子帅，等. 循环热冲压过程中高热导率模具钢的摩擦磨损行为[J]. 材料热处理学报，2022，43(1):75-83. LI Qiying，WU Boya，YANG Zishuai，et al. Friction and wear behavior of high thermal conductivity mold steel during cyclic hot stamping[J]. Journal of Materials and Heat Treatment，2022，43(1):75-83.
[141] 王卫东，曹一枢，周文涵，等. 热冲压模具钢激光熔覆Stellite钴基粉末的工艺研究[J]. 热加工工艺，2023(22):29-32. WANG Weidong，CAO Yishu，ZHOU Wenhan，et al. Study on laser cladding of Stellite6 cobalt-based powder in hot stamping die steel[J]. Hot Working Technology，2023(22):29-32.
[142] HU P，YING L，HE B. Hot stamping advanced manufacturing technology of lightweight car body[M]. Singapore:Springer Singapore，2017.
[143] LIU H，LEI C，XING Z. Cooling system of hot stamping of quenchable steel BR1500HS:Optimization and manufacturing methods[J]. International Journal of Advanced Manufacturing Technology，2013，69(1-4):211-223.
[144] 王世魁. 变强度冲压件热成形关键技术研究[D]. 哈尔滨:哈尔滨工业大学，2014. WANG Shikui. Research on key technologies of hot forming of variable strength stamping parts[D]. Harbin:Harbin Institute of Technology，2014.
[145] 任永强. 变强度汽车梁类零件热冲压成形模具的设计及优化[D]. 武汉:武汉理工大学，2016. REN Yongqiang. Design and optimization of hot stamping forming dies for variable strength automotive beam parts[D]. Wuhan:Wuhan University of Technology，2016.
[146] LIANG W，LIU Y，ZHU B，et al. Conduction heating of boron alloyed steel in application for hot stamping[J]. International Journal of Precision Engineering and Manufacturing，2015，16:1983-1992.
[147] 解东旋，庄蔚敏，王楠，等. 高强度钢板热冲压工艺与装备研究综述[J]. 机械工程学报，2022，58(20):319-338. XIE Dongxuan，ZHUANG Weimin，WANG Nan，et al. Review of research on hot stamping process and equipment of high-strength steel plate[J]. Journal of Mechanical Engineering，2022，58(20):319-338.
[148] 张宜生，王子健，王梁. 高强钢热冲压成形工艺及装备进展[J]. 塑性工程学报，2018，25(5):11-23. ZHANG Yisheng，WANG Zijian，WANG Liang. Progress of hot stamping forming process and equipment of high-strength steel[J]. Chinese Journal of Plastic Engineering，2018，25(5):11-23.
[149] 宋燕利，华林，路珏，等. 超高强钢汽车构件热冲压成形技术与装备[J]. 锻造与冲压，2018(22):16-21. SONG Yanli，HUA Lin，LU Jue，et al. Ultra-high strength steel automotive components hot stamping forming technology and equipment[J]. Forging and Stamping，2018(22):16-21.
[150] VOLLMER R，PALM C. Process monitoring and real time algorithmic for hot stamping lines[J]. Procedia Manufacturing，2019，29:256-263.
[151] WRÓBEL I，DANIELCZYK P. Control system for automated technological process of hot stamping—A case study[J]. Materials，2023，16(10):3658.
[152] YANG X，LIU H，DHAWAN S，et al. Digitally-enhanced lubricant evaluation scheme for hot stamping applications[J]. Nature Communications，2022，13(1):5748.