异种钢窄间隙焊母材熔合比对碳迁移现象影响研究

doi:10.3901/JME.2016.12.074

机械工程学报 ›› 2016, Vol. 52 ›› Issue (12): 74-80.doi: 10.3901/JME.2016.12.074

异种钢窄间隙焊母材熔合比对碳迁移现象影响研究

郑云蔚¹, 蔡志鹏^{2, 3}, 何雨晨¹, 李克俭¹, 潘际銮¹

1. 清华大学机械工程系北京 100084;
2. 清华大学摩擦学国家重点实验室北京 100084;
3. 先进核能技术协同创新中心北京 100084

出版日期:2016-06-15 发布日期:2016-06-15
通讯作者: E-mail：ashleyzyw@163.com ;蔡志鹏(通信作者),男,1974年出生,博士,副研究员。主要研究方向为焊接冶金与焊接结构。E-mail：czpdme@mail.tsinghua.edu.cn
作者简介:郑云蔚,女,1992年出生。主要研究方向为焊接冶金。
基金资助:
摩擦学国家重点实验室资助项目(SKLT2015A02)

Study on the Influence of Fusion Ratio on Carbon Migration Phenomenon in the Narrow Gap Welding of Dissimilar Steels

ZHENG Yunwei¹, CAI Zhipeng^{2, 3}, HE Yuchen¹, LI Kejian¹, PAN Jiluan¹

1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084;
2. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084;
3. Collaborative Innovation Center of Advanced Nuclear Energy Technology, Beijing 100084

Online:2016-06-15 Published:2016-06-15

摘要/Abstract

摘要： 异种钢窄间隙焊焊接接头两侧材料成分存在差异,在9%Cr侧熔合区内发生碳迁移现象。实际异种钢高温构件贫碳层内出现完全铁素体化组织,硬度极低,给焊接接头各项力学性能带来不良影响。设计不同焊道分布形式的异种钢堆焊试板,探究碳迁移程度及贫碳区内铁素体组织产生的影响因素。通过对不同热处理过程试样的金相观察发现,碳迁移主要在回火过程中产生。利用金相观察、显微硬度测试及电子探针成分测试等研究手段,比较焊道不同熔合比状态下的碳迁移现象。三层焊道堆焊试样的焊道交汇处碳迁移现象严重,在贫碳区内出现了完全铁素体化组织,硬度显著降低。电子探针测试结果表明,该位置母材熔合比较低,熔合线两侧铬元素质量分数差异明显导致碳元素活度梯度增加,因此碳迁移现象严重,对异种钢焊接接头的各项力学性能带来不良影响。

关键词: 电子探针, 贫碳层, 熔合比, 碳迁移, 异种钢焊接

Abstract: In the narrow gap welding joints of dissimilar steels, carbon migration happens due to the different components of dissimilar steels. Ferrite with low hardness is found in the carbon depleted zone of a real dissimilar welding high temperature component, which influences the mechanical properties of the welding joint. Bead-on-plate specimens with different weld bead configurations are designed to study the influence factors of carbon migration and the formation of ferrite in carbon-depleted zone. Carbon migration is found to happen during the temper process by metallographic observation. With the method of micro-hardness test and electron probe microanalysis, it is found that fusion ratio has a great influence on carbon migration. The specimen with three layers of welding beads suffers a severe carbon migration phenomenon, ferrite appears in the carbon-depleted zone, with a great decrease of micro-hardness. Electron probe microanalysis indicates that the multilayer intersection has a low fusion rate, the content of Cr across the fusion line is significantly different, which leads to a steep gradient of the activity of C. Carbon migration is severe at this area, which will have a deleterious effect on the mechanical properties of dissimilar welding joints.

Key words: carbon migration, carbon-depleted zone, dissimilar welding, electron probe, fusion ratio

中图分类号:

TG401

郑云蔚, 蔡志鹏, 何雨晨, 李克俭, 潘际銮. 异种钢窄间隙焊母材熔合比对碳迁移现象影响研究[J]. 机械工程学报, 2016, 52(12): 74-80.

ZHENG Yunwei, CAI Zhipeng, HE Yuchen, LI Kejian, PAN Jiluan. Study on the Influence of Fusion Ratio on Carbon Migration Phenomenon in the Narrow Gap Welding of Dissimilar Steels[J]. Journal of Mechanical Engineering, 2016, 52(12): 74-80.

参考文献

[1] 匡江红,陈端雨. 1000MW级火电机组锅炉发展综述[J]. 动力工程,2003(1)：2127-2134.
KUANG Jianghong,CHEN Duanyu. Overview of the development of boiler of 1000MW of thermal power unit[J]. Power Engineering,2003(1)：2127-2134.
[2] KADOYA Y,MAGOSHI R,KAWAI H,et al. Development of high-and low-pressure rotor forgings for high temperature steam turbine[J]. Tetsu-to-Hagane,2001,87：564-569.
[3] 梅林波,沈红卫,王思玉,等. 625℃汽轮机转子材料的开发及性能分析[J]. 热力透平,2012,41(3)：183-187.
MEI Linbo,SHEN Hongwei,WANG Siyu,et al. The development of property analysis of rotor material for 625℃ steam turbines[J]. Thermal Turbine,2012,41(3)：183-187.
[4] 刘希涛,蒋浦宁. AP1000核电汽轮机的创新设计特点[J]. 热力透平,2011(4)：225-230.
LI Xitao,JIANG Puning. New features for AP1000 nuclear steam turbines[J]. Thermal Turbine,2011(4)：225-230.
[5] 李轶非,王梁,吴健栋,等. NiCrMoV耐热钢贝氏体焊缝韧性薄弱区的确定[J]. 机械工程学报,2013,49(4)：83-88.
LI Yifei,WANG Liang,WU Jiandong,et al. Determination of toughness weak points of bainite weld metal of NiCrMoV refractory steel[J]. Journal of Mechanical Engineering,2013,49(4)：83-88.
[6] ULM W. The situation in steam turbine construction and current development trends[J]. Operation Maintenance and Materials Issues,2003,3(2)：1-9.
[7] NAKANO T,TANAKA K,NAKAZAWA T,et al. Development of large-capacity single-casing reheat steam turbines for single-shaft combined cycle plant[J]. Technical Review,2005,42(3)：1-5.
[8] 曹建. 超超临界机组用T/P92异种钢焊接接头结构与性能的研究[D]. 上海：复旦大学,2011.
CAO Jian. Research on microstructure and properties of T/P92 dissimilar materials joints in USC boilers[D]. Shanghai：Fudan University,2011.
[9] 林金平,吴崇志. 窄间隙焊技术在核电建设中的应用[J]. 电焊机,2011(9)：16-20.
LIN Jinping,WU Chongzhi. Research on the narrow gap welding in the nuclear power plant construction[J]. Electric Welding Machine,2011(9)：16-20.
[10] 周方明,王江超,周涌明,等. 窄间隙焊接的应用现状及发展趋势[J]. 焊接技术,2007(4)：4-7.
ZHOU Fangming,WANG Jiangchao,ZHOU Yongming,et al. Present application and trends in narrow gap welding[J]. Welding Technology,2007(4)：4-7.
[11] 王朋,刘霞. 深窄间隙焊接技术在大厚度构件材料焊接中的应用研究[J]. 机械工程学报,2016,52(2)：56-61.
WANG Peng,LIU Xia. Application of deep-narrow gap welding method in manufacturing component with heavy section[J]. Journal of Mechanical Engineering,2016,52(2)：56-61.
[12] RAMAKRISHNAN M,MUTHUPANDI V. Application of submerged arc welding technology with cold wire addition for drum shell long seam butt welds of pressure vessel components[J]. International Journal of Advanced Manufacturing Technology,2013,65(5-8)：945-956.
[13] 蔡志鹏,何雨晨,李克俭,等. 用位错-溶质复合体模型解释马氏体异种钢焊接接头碳迁移过程[J]. 清华大学学报,2015,55(3)：316-321.
CAI Zhipeng,HE Yuchen,LI Kejian,et al. Dislocation-solute vacancy complex model of the carbon distribution in martensite dissimilar metal weld joint[J]. Journal of Tsinghua University,2015,55(3)：316-321.
[14] YOU Y Y,SHIUE R K,SHIUE R H,et al. The study of carbon migration in dissimilar welding of the modified 9Cr-1Mo steel[J]. Journal of Materials Science Letters,2001,20(15)：1429-1432.
[15] SUDHA C,TERRANCE A L E,ALBERT S K,et al. Systematic study of formation of soft and hard zones in the dissimilar weldments of Cr-Mo steels[J]. Journal of Nuclear Materials,2002,302(2)：193-205.
[16] ALBERT S K,GILL T,TYAGI A K,et al. Soft zone formation in dissimilar welds between two Cr-Mo steels[J]. Welding Journal,1997,76(3)：S135-S142.
[17] 李克俭,蔡志鹏,李轶非,等. 碳迁移对9%Cr和2.25%Cr异种钢焊接接头高温韧性的影响[J]. 机械工程学报,2015,51(16)：150-155.
LI Kejian,CAI Zhipeng,LI Yifei,et al. Influence of carbon migration on the toughness of heat affected zone of 9%Cr+2.25%Cr dissimilar welds at high temperature[J]. Journal of Mechanical Engineering,2015,51(16)：150-155.
[18] ZHU Liang,ZHENG Shaoxian,CHEN Jianhong. Development of ultra-narrow gap welding with constrained arc by flux band[J]. China Welding,2006,15(2)：44-49.
[19] DOOLEY R B,STEPHENSON G G,TINKLER M J,et al. Ontario hydro experience with dissimilar metal welds in boiler tubing[J]. Welding Journal,1982,61(2)：S45-S49.
[20] BHADURI A K,GOWRISANKAR I,SEETHARAMAN V. Development of transition metal joint for steam generator circuit of prototype fast breeder reactor[J]. Materials Science&Technology,1988,11(4)：1020-1029.
[21] LUNDIN C D,KHAN K K,YANG D. Report No. 1：Effect of carbon migration in Cr-Mo weldments on metallurgical structure and mechanical properties[J]. Bulletin- Welding Research Council,1995,407：1-49.

异种钢窄间隙焊母材熔合比对碳迁移现象影响研究

Study on the Influence of Fusion Ratio on Carbon Migration Phenomenon in the Narrow Gap Welding of Dissimilar Steels

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 6

编辑推荐

Metrics

本文评价

[1]	李克俭, 蔡志鹏, 李轶非, 孙林根, 何雨晨, 潘际銮. 碳迁移对9%Cr和2.25%Cr异种钢焊接接头高温韧性的影响[J]. 机械工程学报, 2015, 51(16): 150-155.
[2]	蔡建鹏, 叶延洪, 张彦杰, 邓德安. 坡口形式对Q345/SUS304异种钢对接接头残余应力和变形的影响[J]. 机械工程学报, 2015, 51(10): 55-61.
[3]	张建强;李太江;姚兵印;刘福广;章应霖. 马氏体/贝氏体异种耐热钢焊接接头界面蠕变失效数值模拟[J]. , 2011, 47(10): 64-69.
[4]	张建强;吴苏;赵海燕;鹿安理;王煜. 马氏体/贝氏体异种耐热钢焊接接头的力学性能及界面失效[J]. , 2003, 39(2): 58-61.
[5]	史春元;杨德新;陈字刚;田锡唐. 异种耐热钢焊接接头低塑性蠕变失效力学因素的研究[J]. , 2000, 36(9): 29-32.
[6]	张福成;徐安友;徐铁砚;王天生;胡白桃. 借助梯度涂层进行ZGMn13钢与U71Mn钢的焊接性研究[J]. , 1999, 35(4): 67-69.