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填充金属对TC4钛合金激光填丝焊接头组织性能影响
作者:
作者单位:

1.哈尔滨焊接研究院有限公司;2.郑州机械研究所有限公司 新型钎焊材料与技术国家重点实验室;3.北京金威焊材有限公司;4.重庆科技学院 冶金与材料工程学院

中图分类号:

TG442

基金项目:

国家重点研发计划资助项目(2021YFB3401100);黑龙江省头雁行动计划-能源装备先进焊接技术创新团队资助(201916120);新型钎焊材料与技术国家重点实验室开放课题(SKLABFMT202005).


Effect of Filler Metal on Microstructure and Properties of Titanium Alloy Laser Welding Joints with Filler Wire
Affiliation:

Harbin Welding Institute Limited Company

Fund Project:

This work was financially supported by the national key research and development plan of China (2021YFB3401100);Heilongjiang head goose action plan-advanced welding technology innovation team of energy equipment (201916120);open project of the state key laboratory of new brazing materials and technology (SKLABFMT202005).

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    摘要:

    摘要:分别采用TC3实心焊丝和Ti-Al-V-Mo系药芯焊丝作为填充金属,进行TC4钛合金板窄间隙激光填丝焊,并对获得的焊接接头组织性能进行了分析研究。结果表明,两组焊接接头各区域的微观尺度区别较明显,激光填药芯焊丝焊接接头中的焊缝区与粗晶区中的α"马氏体长度较小,并且焊缝区中原始β相晶界宽度也较窄;激光填实心焊丝焊缝中α"马氏体板条宽约0.55 μm,板条α"马氏体之间穿插着少量残留β相,在α"马氏体内部发现位错,并形成少量的位错塞积;激光填药芯焊丝焊缝中的针状α"马氏体宽度约0.35 μm,板条α"马氏体之间同样穿插着少量残留β相,针状α"马氏体内含有少量的细孪晶和大量的位错塞积形成的位错墙,同时在相界位置也发现更加密集的位错,残留β相含量也要略多;激光填实心焊丝焊接接头焊缝区中晶粒间的取向差大于10°的大角度晶界占比约79.25 %,药芯焊丝约为96.27 %;激光填药芯焊丝焊接

    Abstract:

    Abstract: TC3 solid wire and Ti-Al-V-Mo flux-cored wire were used as filler metals to carry out narrow gap laser welding of TC4 titanium alloy plate. The results show that the micro-scale differences between the two groups are obvious, the length of α" Martensite in the weld zone and coarse grain zone is small, and the width of original β phase grain boundary is narrow in the weld zone The width of α" Martensite lath is about 0.55 μm, a small amount of residual β phase is inserted between α" martensite and a small amount of dislocation is found in α" martensite. The width of acicular α" martensite is about 0.35 μm in Laser flux-cored wire weld, and a small amount of residual β phase is interlaced between Lath α" martensite. Acicular α" martensite contains a small number of fine twins and a large number of dislocation walls, in the same time, more dense dislocations were found at the phase boundary, and the content of residual β phase was a little more. In the weld zone of laser filled solid wire welded joint, the proportion of grain orientation difference greater than 10 ° with large angle grain boundary was about 79.25 %, and that of flux cored wire was about 96.27 %. The average hardness and tensile property of weld zone and HAZ of laser-filled flux-cored wire welded joint is larger than that of laser-filled solid wire welded joint.

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方乃文,黄瑞生,龙伟民,徐锴,李伟,武鹏博,尹立孟,曹浩,马一鸣,邹吉鹏.填充金属对TC4钛合金激光填丝焊接头组织性能影响[J].稀有金属材料与工程,2023,52(5):1725~1736.[Fang Naiwen, Huang Ruisheng, Long Weimin, Xu Kai, Li Wei, Wu Pengbo, YIn Limeng, Cao Hao, Ma Yiming, Zou Jipeng. Effect of Filler Metal on Microstructure and Properties of Titanium Alloy Laser Welding Joints with Filler Wire[J]. Rare Metal Materials and Engineering,2023,52(5):1725~1736.]
DOI:10.12442/j. issn.1002-185X.20220303

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  • 收稿日期:2022-04-12
  • 最后修改日期:2022-05-18
  • 录用日期:2022-06-08
  • 在线发布日期: 2023-06-08
  • 出版日期: 2023-05-29