Effect of Liquid Nitrogen Cooling on Microstructure, Residual Stress and Deformation of TC4 Titanium Alloy Laser Welding

YE Zetao; LI Yue; MA Longfei; ZHAN Xiaohong; WANG Jianfeng; ZHUANG Mingxiang

doi:10.7512/j.issn.1001-2303.2023.07.09

Laser Welding of Advanced Materials | Views : 0 下载量: 8 CSCD: 0

PDF
Export
Share
Collection
Album

Effect of Liquid Nitrogen Cooling on Microstructure, Residual Stress and Deformation of TC4 Titanium Alloy Laser Welding
Vol. 53, Issue 7, Pages: 60-66(2023)
DOI： 10.7512/j.issn.1001-2303.2023.07.09

扫描看全文

叶泽涛，李悦，马龙飞，等.液氮冷却对TC4钛合金激光焊接微观组织、残余应力与变形的影响［J］.电焊机，2023，53（7）：60-66.

YE Zetao, LI Yue, MA Longfei, et al.Effect of Liquid Nitrogen Cooling on Microstructure, Residual Stress and Deformation of TC4 Titanium Alloy Laser Welding[J].Electric Welding Machine, 2023, 53(7): 60-66.
叶泽涛，李悦，马龙飞，等.液氮冷却对TC4钛合金激光焊接微观组织、残余应力与变形的影响［J］.电焊机，2023，53（7）：60-66. DOI： 10.7512/j.issn.1001-2303.2023.07.09.

YE Zetao, LI Yue, MA Longfei, et al.Effect of Liquid Nitrogen Cooling on Microstructure, Residual Stress and Deformation of TC4 Titanium Alloy Laser Welding[J].Electric Welding Machine, 2023, 53(7): 60-66. DOI： 10.7512/j.issn.1001-2303.2023.07.09.

摘要

针对钛合金薄板激光焊接残余应力与焊接变形大的问题，提出了液氮冷却激光焊接方法，将液氮冷却氩气作为冷却介质作用于试件表面。开展了TC4钛合金锁底结构液氮冷却激光焊接实验，分析了不同冷却条件下TC4钛合金激光焊接接头的微观组织、残余应力与焊接变形。结果表明，相较于自然冷却的激光焊接接头，液氮冷却激光焊接接头热影响区宽度变窄，焊缝中部宽度增大63.7%，下熔宽增大70.5%，焊缝组织更为均匀，焊后变形显著减小，整体变形量降低约5.2%。这是由于液氮冷却熔池后方处于高温的金属急剧冷却，很大程度上补偿了已产生的压缩塑性应变，使得焊接变形减小。

Abstract

Focusing on the problem of large residual stress and welding deformation in laser welding with titanium alloy thin-walled structures, a laser welding method with liquid nitrogen-assisted cooling was proposed for the control of welding deformation, in which liquid nitrogen cooled argon was used as the cooling medium on the surface of the specimen. The laser welding experiment of TC4 titanium alloy lock bottom structure with liquid nitrogen cooling was carried out. The microstructure, residual stress and welding deformation of TC4 titanium alloy laser welded joint under different cooling conditions were analyzed. The results show that compared with the laser welded joint with natural cooling, the width of heat affected zone of liquid nitrogen cooled laser welded joint was narrower, the middle width of weld joint was increased by 63.7%, the down melting width was increased by 70.5%, the weld structure was more uniform, the weld deformation was significantly reduced, and the overall deformation was reduced by about 5.2%. Due to the metal at high temperature behind the molten pool cooled by liquid nitrogen cools rapidly, which compensates the compressive plastic strain to a great extent and reduces the welding deformation.

关键词

TC4钛合金锁底结构激光焊接液氮冷却残余应力焊接变形

Keywords

TC4 titanium alloylock bottom structurelaser weldingliquid nitrogen-assisted coolingresidual stresswelding deformation

references

Yan T， Liu J， Hu K， et al. Microstructure and texture evolution of Ti-6Al-4V alloy T-joint fabricated by dual laser beam bilateral synchronous welding［J］. Materials Science and Engineering A， 2021， 822： 141426.

李坤，王威，单际国，等. TC4钛合金光纤激光摆动焊抑制小孔型气孔的原因分析［J］. 焊接学报， 2016， 37（11）： 43-46+131.

LI K， WANG W， SHAN J G， et al. Analysis of keyhole-type pore suppressing in fiber laser welded TC4 titanium alloy with beam weaving［J］. Transactions of The China Welding Institution， 2016， 37（11）： 43-46+131.

Qi N， Zhan X H， Chen S， et al. Effect of Laser Power on Tensile Performance of TA15 Laser-Welded Lock Bottom Joint［J］. Metals and Materials International， 2021， 27： 4645-4656.

Zhan X H， Liu J Z， Yan T Y， et al. Study on the grain morphology and fracture performance of T-joints for Ti6Al4V alloy manufactured by dual laser beam bilateral synchronous welding［J］. Optics and Laser Technology， 2021， 141： 107153.

李昊，陈洁，陈磊，等. 双光束激光焊接技术在民用飞机上的应用现状及发展［J］. 航空制造技术， 2012， 417（21）： 50-53.

LI H， CHEN J， CHEN L， et al. Existing state and development on dual laser-beam bilateral welding technology used in civil aircraft［J］. Aeronautical Manufacturing Technology， 2012， 417（21）： 50-53.

陈柯. 激光加工技术在钛合金航空结构件制造的应用与展望［J］. 电焊机， 2022， 52（08）： 1-9.

CHEN K. Application and prospect of titanium alloy and its laser processing technology in aeronautic structure manufacturing［J］.Electric Welding Machine，2022，52（08）： 1-9.

Mikhail M S， Nikolay I G， Yuriy N S. Redistribution of residual stresses in girth weld of a pipe of strength class K60 after ultrasonic impact treatment［J］. Procedia Structural Integrity， 2020， 30： 149-153.

王志刚，张建晓，王庆江. 振动时效处理和消应力热处理对304L不锈钢焊接残余应力的影响［J］. 电焊机， 2022， 52（02）： 103-108.

WANG Z G， ZHANG J X， WANG Q J. Influence of vibration aging treatment and stress relief annealing on welding residual stress of 304L stainless steel［J］. Electric Welding Machine， 2022， 52（02）： 103-108.

Deenadayala K， Murali V， Elayaperumal A， et al. Effective role of short time furnace heat treatment and laser treatment on the residual stress and mechanical properties of NiCrBSi-WC weldments produced using plasma transferred arc welding process［J］. Journal of Materials Research and Technology，2021，15：3492-3513.

曹永青，林鑫，汪志太，等. 液氮冷却条件下激光快速熔凝Ni-28 wt%Sn合金组织演变［J］. 物理学报， 2015， 64（10）： 315-323.

CAO Y Q， LIN X， WANG Z T， et al. Microstructural evolution of laser surface remelting Ni-28 wt%Sn alloy under liquid nitrogen cooling［J］. Acta Physica Sinica， 2015， 64（10）： 315-323.

肖茂，肖绯雄，王腾飞，等. T型接头随焊激冷数值模拟［J］. 电焊机， 2019， 49（08）： 87-90.

XIAO M， XIAO F X， WANG T F， et al. Numerical simulation of T-joint of welding with trailing cooling［J］. Electric Welding Machine， 2019， 49（08）： 87-90.

刘西霞. 钛合金薄板激光焊接变形控制研究［D］. 湖南：湖南大学， 2014.

LIU X X. Study on the control of Laser Welding Deformation of Titanium alloy thin sheet［D］. Hunan： Hunan University， 2014.

编辑部网址：http：//www.71dhj.comhttp://www.71dhj.com

Alert me when the article has been cited

提交

Finite Element Analysis of Bottom Welds of High Strength Steel CO₂ Welding

Study on Temperature Field and Deformation of Double Electron Beam Welding of Intermediate Case of Aero Engine