Flexible Waveform Interpulse TIG Welding for Titanium Alloy

doi:10.3901/JME.2020.06.102

Abstract

Abstract: Based on the self-developed SiC MOSFET interpulse welding power supply system, a novel flexible waveform interpulse welding technology is proposed. The SiC MOSFET is used as the inverter power device, which improves the inverter frequency and the dynamic response of the power supply. The interpulse welding power supply enhances the control effect of high-frequency arc to reach high stability in output of the regular and flexible current waveform of the interpulse at 20 kHz. The method is applied to the welding of titanium alloy TC4. Compared with the conventional pulsed TIG, the arc radial dimension of the interpulse TIG is reduced, and the grains in the fusion zone and HAZ of the weld are significantly refined. The average grain size in the fusion zone is decreased by 71%.

Key words: interpulse welding, welding waveform control, titanium alloy, SiC MOSFET

CLC Number:

TG439

WU Jianwen, XU Mengjia, FAN Wenyan, CHEN Haoyu, JIANG Donghang, WANG Zhenmin. Flexible Waveform Interpulse TIG Welding for Titanium Alloy[J]. Journal of Mechanical Engineering, 2020, 56(6): 102-109.

References

[1] MEHDI B,BADJI R,JI B,et al. Microstructure and residual stresses in Ti-6Al-4V alloy pulsed and unpulsed TIG welds[J]. Journal of Materials Processing Technology,2016,231:441-448.
[2] BABU N,RAMAN S,MYTHILI R,et al. Correlation of microstructure with mechanical properties of TIG weldments of Ti-6Al-4V made with and without current pulsing[J]. Materials Characterization,2007,58(7):581-587.
[3] BABU N,RAMAN S,MYTHILI R,et al. Influence of current pulsing on microstructure and mechanical properties of Ti-6Al-4V TIG weldments[J]. Science and Technology of Welding and Joining,2006,11(4):442-447.
[4] 许鸿吉,尹丽香,李晋炜,等. TC4钛合金电子束焊接接头组织和性能[J].焊接学报,2005,26(11):43-46. XU Hongji,YIN Lixiang,LI Jinwei,et al. Microstructures and properties of TC4 titanium alloy joints welded by the electron beam welding[J]. Transactions of the China Welding Institution,2005,26(11):43-46.
[5] HU M,LIU J. Effects of zonal heat treatment on residual stresses and mechanical properties of electron beam welded TC4 alloy plates[J]. Transactions of Nonferrous Metals Society of China,2009,19(2):324-329.
[6] XU L,ZHU J,JING H,et al. Effects of deep cryogenic treatment on the residual stress and mechanical properties of electron-beam-welded Ti-6Al-4V joints[J]. Materials Science and Engineering:A. 2016,673:503-510.
[7] LU W,SHI Y,LEI Y,et al. Effect of electron beam welding on the microstructures and mechanical properties of thick TC4-DT alloy[J]. Mater. Des.,2012,34:509-515.
[8] WANG Y,QI B,CONG B,et al. Arc characteristics in double-pulsed VP-GTAW for aluminum alloy[J]. Journal of Materials Processing Technology,2017,249:89-95.
[9] YANG Z,QI B,CONG B,et al. Microstructure,tensile properties of Ti-6Al-4V by ultra high pulse frequency GTAW with low duty cycle[J]. Journal of Materials Processing Technology,2015,216:37-47.
[10] FANG Y,LIU Z,CUI S,et al. Improving Q345 weld microstructure and mechanical properties with high frequency current arc in keyhole mode TIG welding[J]. Journal of Materials Processing Technology,2017,250:280-288.
[11] 高晓刚,董俊慧,韩旭. TC4钛合金TIG焊接头组织对性能的影响[J].焊接,2016(7):27-31. GAO Xiaogang,DONG Junhui,HAN Xu. Effect of microstructure of TC4 titanium alloy joints welded by the TIG on properties[J]. Welding & Joining,2016(7):27-31.
[12] YANG M,ZHENG H,QI B,et al. Effect of arc behavior on Ti-6Al-4V welds during high frequency pulsed arc welding[J]. Journal of Materials Processing Technology,2017(243):9-15.
[13] 常云龙,刘民军,路林,等.电流脉冲频率对TIG焊电弧压力的影响[J].沈阳工业大学学报,2015,37(5):500-504. CHANG Yunlong,LIU Minjun,LU Lin,et al. Effect of current pulse frequency on arc pressure of TIG welding[J]. Journal of Shenyang University of Technology,2015,37(5):500-504.
[14] LEARY K,MERSON E,BIRMINGHAM K,et al. Microstructural and microtextural analysis of InterPulse GTCAW welds in Cp-Ti and Ti-6Al-4V[J]. Materials Science and Engineering A,2010,527(29-30):7694-7705.
[15] VAITHIYANATHAN V,BALASUBRAMANIAN V,MALARVIZHI S,et al. Gas tungsten constricted arc welding (GTCAW) parameters optimization to attain maximum tensile strength in Ti-6Al-4V alloy sheets used in aero-engine components[J]. Multiscale Multidiscip Model Exp. Des.,2019,2(4):291-291.
[16] MURTHY C,GOPALA K,REDDY G. Microstructure and mechanical properties of similar and dissimilar metal gas tungsten constricted arc welds:Maraging steel to 13-8 Mo stainless steel[J]. Def. Technol.,2019,15(1):111-121.
[17] KUMAR P,BHASKAR Y,MASTANAIAH P,et al. Study on dissimilar metals welding of 15CDV6 and SAE 4130 steels by inter pulse gas tungsten arc welding[J]. Procedia Materials Science,2014,5:2382-2391.
[18] SUNDARESAN S,RAM G,REDDY G. Microstructural refinement of weld fusion zones in α-β titanium alloys using pulsed current welding[J]. Materials Science and Engineering A,1999,262(1-2):88-100.
[19] LEARY R,MERSON E,BRYDSON R. Microtextures and grain boundary misorientation distributions in controlled heat input titanium alloy fusion welds[J]. Journal of Physics:Conference Series,2010,241(1):012103.
[20] 朱志明,汤莹莹,纪圣儒,等.超音频脉冲电源及其与焊接电源的并联耦合[J].焊接学报,2016,37(8):13-16. ZHU Zhiming,TANG Yingying,JI Shengru,et al. Ultrahigh frequency pulse power supply and its parallel coupling with welding power supply[J]. Transactions of the China Welding Institution,2016,37(8):13-16.
[21] YANG M,ZHENG H,QI B,et al. Microstructure and fatigue property of Ti-6Al-4V by ultrahigh frequency pulse welding[J]. Journal of Manufacturing Science and Engineering,2016,139(4):041015.
[22] 钟启明,谢芳祥,王振民.新型双脉冲MIG焊接电源[J].焊接学报,2019,40(7):94-99,165. ZHONG Qiming,XIE Fangxiang,WANG Zhenmin. Research of a novel double-pulsed MIG welding power supply[J]. Transactions of the China Welding Institution,2019,40(7):94-99,165.
[23] 王振民,汪倩,王鹏飞,等.新一代WBG弧焊逆变电源[J].焊接学报,2016,37(7):49-52. WANG Zhenmin,WANG Qian,WANG Pengfei,et al. New generation WBG arc welding inverter power supply[J]. Transactions of the China Welding Institution,2016,37(7):49-52.
[24] YANG L,LI K,DAI J,et al. Electrical performance and reliability characterization of a SiC MOSFET power module with embedded decoupling capacitors[J]. IEEE Transactions on Power Electronics,2018,33(12):10594-10601.
[25] GAO F,ZHOU Q,WANG P,et al. A gate driver of SiC MOSFET for suppressing the negative voltage spikes in a bridge circuit[J]. IEEE Transactions on Power Electronics,2018,33(3):2339-2353.
[26] LIU T,WONG T,SHEN Z. A new characterization technique for extracting parasitic inductances of SiC power MOSFETs in discrete and module packages based on two-port S-parameters measurement[J]. IEEE Trans-actions on Power Electronics,2018,33(11):9819-9833.
[27] JI S,LAITINEN M,HUANG X,et al. Short circuit characterization and protection of 10 kV SiC MOSFET[J]. IEEE Transactions on Power Electronics,2019,34(2):1755-1764.
[28] LIN J,LÜ Y,LIU Y,et al. Microstructural evolution and mechanical properties of Ti-6Al-4V wall deposited by pulsed plasma arc additive manufacturing[J]. Materials & Design,2016,102:30-40.
[29] LEVINE E,GREENHUT I,MARGOLIN H. Grain size and grain growth in an equiaxed alpha-beta titanium alloy[J]. Metallurgical Transactions,1973,4(11):2519-2525.
[30] WU K. Correlation of properties and microstructure in welded Ti-6Al-6V-2Sn[J]. Welding Journal,1981,60(11):219-226.