钛合金混合保护气等离子弧焊接头组织及性能

材料导报

2021, Vol. 35

Issue (Z1): 371-373

金属与金属基复合材料

钛合金混合保护气等离子弧焊接头组织及性能

刘甲, 陈高澎, 马照伟, 雷小伟, 贾晓飞, 崔永杰

中国船舶集团有限公司第七二五研究所,洛阳 471039

Microstructure and Properties of Double Gas PAW Joints on Titanium Alloy

LIU Jia, CHEN Gaopeng, MA Zhaowei, LEI Xiaowei, JIA Xiaofei, CUI Yongjie

Luoyang Ship Material Research Institute, Luoyang 471039, China

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摘要研究了混合保护气等离子弧焊接技术,获得了16 mm厚TC4板对接一次焊透、单面焊双面成形的焊接工艺。对焊接试板进行了接头微观组织、力学性能、工艺性能等测试,结果表明:TC4混合保护气等离子弧焊焊接接头焊缝组织主要为α′相、针状α相、晶间α相,粗大的高温β相晶界也被保留下来,热影响区主要由针状α相和晶间α相组成。相对于母材,接头平均抗拉强度提高了约20 MPa,平均屈服强度降低了108.3 MPa,平均断后延伸率约6.8%;相对于母材,焊缝冲击吸收功平均提高了21 J,热影响区冲击吸收功平均提高了17 J;工艺性能尚可。混合保护气等离子弧焊焊接技术具有良好的应用前景。

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关键词: 混合保护气等离子弧焊接微观组织力学性能工艺性能

Abstract: The technology of plasma arc welding of mixed gas was studied. The welding process of TC4 plate butt welding on 16 mm thick was obtained. The microstructure, mechanical properties and process performance of the joint were tested. The results show that: the microstructure of TC4 mixed gas plasma arc welded joint was mainly composed of α′,needle α, intergranular α, and massive high temperature β.Heat affected zone was mainly composed of needle α and intergranular α. Compared with the base metal, the tensile strength was increased by 20 MPa, and the yield strength decreased by about 108.3 MPa. And the average elongation after fracture was about 6.8%. Compared with the base metal, the impact absorption of the weld and heat-affected zone was increased by 21 J and 17 J on average. The process performance is acceptable. Mixed gas plasma arc welding technology has a good application prospect.

Key words: plasma arc welding of mixed gas microstructure mechanical properties process performance

发布日期: 2021-07-16

ZTFLH:

TG444.2

通讯作者: liuj725@126.com

作者简介: 刘甲,中国船舶集团有限公司第七二五研究所焊接工程师。2009年9月至2013年7月,在长安大学获得材料成型与控制工程专业学士学位,2013年9月至2016年7月,在西安交通大学获得材料科学与工程专业工学硕士学位,毕业后入职中国船舶集团有限公司第七二五研究所。主要研究方向为钛合金焊接技术及工艺。

引用本文:

刘甲, 陈高澎, 马照伟, 雷小伟, 贾晓飞, 崔永杰. 钛合金混合保护气等离子弧焊接头组织及性能[J]. 材料导报, 2021, 35(Z1): 371-373.
LIU Jia, CHEN Gaopeng, MA Zhaowei, LEI Xiaowei, JIA Xiaofei, CUI Yongjie. Microstructure and Properties of Double Gas PAW Joints on Titanium Alloy. Materials Reports, 2021, 35(Z1): 371-373.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2021/V35/IZ1/371

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