摘要
文摘研究了TC4钛合金激光焊接在平焊、横焊两种位置下工艺参数对气孔生成量的影响。结果表明:平焊时,气孔生成量随激光功率、离焦量的增大先减小后增大,随焊接速度的增大先增大后减小;横焊时,气孔生成量随激光功率的增大而增大,随焊接速度的增大而减小,随离焦量的增大先减小后增大。利用正交试验方法得到的优化工艺参数进行焊接,气孔生成量大幅减少,在两种位置下均可得到内部质量良好的焊缝。
The influence of welding parameters on porosity in the welding of TC4 titanium alloy in flat and hori- zontal positions was investigated. Results showed that parameters had different influences on porosity in different posi- tions. In fiat position, the amount of porosity decreased first and then increased with the increase of laser power and defocus, it increased first and then decreased with the increase of welding speed ; in horizontal position, the amount of porosity decreased with the decrease of laser power and the increase of welding speed, and it decreased first and then increased with the increase of defocus. By optimization of parameters with the range analysis method, the amount of porosity is reduced significantly in weld beads, and welds with good inner quality could be produced under both flat and horizontal welding positions.
作者
李海刚
原璋
程昊
蒲海涛
常保华
都东
单际国
LI Haigang1 ,YUAN Zhang2, CHENG CHANG Baohua2 ,DU Dong2, Hao1 ,PU Haitao2 ,SHAN Jiguo2(1 Aerospace Research Institute of Materials & Processing Technology, Beijing 100076) Department of Mechanical Engineering, Tsinghua University and Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Ministry of Education of P.R.China, Beijing 10008)
出处
《宇航材料工艺》
CSCD
北大核心
2017年第6期39-42,共4页
Aerospace Materials & Technology
基金
国家自然科学基金重点支持项目(U1537205)
关键词
TC4钛合金
激光焊接
平焊
横焊
气孔
TC4 Titanium alloy, Laser welding, Flat position, Horizontal position, Porosity
作者简介
李海刚,1972年出生,高级工程师,主要从事特种焊接工艺技术研究。E-mail:wuweizizhixy@163.com.;通信作者:常保华,1973年出生,副教授,主要从事激光焊接与增材制造领域的研究。E-mail:bhchang@tsinghUa.edu.cn