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超声跨态处理对TC4钛合金激光焊缝组织晶粒度的影响

Effect of UPPLW on Grain Size of Laser Welding Joints of TC4 Titanium Alloy

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摘要

为改善TC4钛合金激光焊接质量,引进超声振动场辅助激光焊接工艺,即超声跨态处理(UPPLW),通过改变超声场强度,采用三圆截点法研究超声功率对激光焊接接头微观组织的影响,利用可靠性理论对数据进行分析。结果表明,在外加辅助超声场作用下,随着超声功率的增加,焊缝组织晶粒有逐渐细化的趋势,当超声功率为1600 W时,试样焊缝组织的晶粒度较常规方法获得的细化了15.8%。最后分析了超声跨态处理工艺细化组织晶粒的机理。

Abstract

In order to improve the laser welding quality of TC4 titanium alloy, a technology named ultrasonic processing across different phases based on laser welding (UPPLW) is introduced. With the three-circle-cutoff-point method, the effect of ultrasonic vibration field power on the microstructures of laser welding joints is studied by changing the intensity of ultrasonic vibration field, and the measured data are analyzed based on the reliability theory. The results show that, under the influence of the ultrasonic vibration field, with the increase of ultrasonic vibration power, the microstructure grain of the welding joints has a tendency to be progressively refined. When the power is 1600 W, the grain is refined by about 15.8% compared with that obtained with conventional methods. The mechanism for UPPLW to refine grain is finally analyzed.

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中图分类号:TG146.2;TG456.7

DOI:10.3788/cjl201643.0802005

所属栏目:激光制造

基金项目:国家自然科学基金(51505491)、海军航空工程学院创新基金(20121009)

收稿日期:2016-01-12

修改稿日期:2016-03-02

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作者单位    点击查看

刘浩东:海军航空工程学院青岛校区, 山东 青岛 266041
胡芳友:海军航空工程学院青岛校区, 山东 青岛 266041
崔爱永:海军航空工程学院青岛校区, 山东 青岛 266041
戴京涛:海军航空工程学院青岛校区, 山东 青岛 266041
黄飞:海军装备部航技部, 北京 100071
李洪波:中国石油大学(华东)储运与建筑工程学院, 山东 青岛 266580

联系人作者:刘浩东(mdlhd@sina.com)

备注:刘浩东(1986—),男,博士研究生,主要从事激光加工技术在航空飞行器维修领域应用方面的研究。

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引用该论文

Liu Haodong,Hu Fangyou,Cui Aiyong,Dai Jingtao,Huang Fei,Li Hongbo. Effect of UPPLW on Grain Size of Laser Welding Joints of TC4 Titanium Alloy[J]. Chinese Journal of Lasers, 2016, 43(8): 0802005

刘浩东,胡芳友,崔爱永,戴京涛,黄飞,李洪波. 超声跨态处理对TC4钛合金激光焊缝组织晶粒度的影响[J]. 中国激光, 2016, 43(8): 0802005

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