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铝合金随焊控制焊接应力与交形的几种新方法
引用本文:方洪渊,李军,杨建国,刘雪松,周广涛,许威.铝合金随焊控制焊接应力与交形的几种新方法[J].焊接,2009(7).
作者姓名:方洪渊  李军  杨建国  刘雪松  周广涛  许威
作者单位:哈尔滨工业大学现代焊接生产技术国家重点实验室,150001
摘    要:采用力学手段,对铝合金焊接熔池后方的脆性温度区间施加横向挤压应力,同时使焊缝纵向保持塑性延展,从而达到随焊控制焊接应力与变形并防止焊接热裂纹的目的.介绍了随焊冲击碾压、随焊旋转挤压、双向预置应力和随焊电磁冲击等几种控制焊接应力与变形的新方法.在合适的工艺参数条件下,可以将铝合金平板对接焊件的残余变形量降低到很低的程度,同时町以防止焊接热裂纹的产生.

关 键 词:铝合金  焊接应力  随焊控制  变形  热裂纹

Several new in-process control methods for the welding of aluminum alloy thin-plate structures
Fang Hongyuan,Li Jun,Yang Jianguo,Liu Xuesong,Zhou Gnangtao,Xu Wei.Several new in-process control methods for the welding of aluminum alloy thin-plate structures[J].Welding & Joining,2009(7).
Authors:Fang Hongyuan  Li Jun  Yang Jianguo  Liu Xuesong  Zhou Gnangtao  Xu Wei
Abstract:For the purpose of decreasing stresses and distortion as well as preventing hot crack during welding, the mechanical means are a-dopted to exert transverse extrusion strain on weld metal in brittle temperature range behind the molten pool,and at the same time produce lon-gitudinal plastic elongation in the weld. In this paper, several welding in-process methods including Welding with Trailing Impact. Rolling, Welding with Trailing Rotating Extrusion,Two-way Prestressing Method and Welding with Trailing Impactive Electromagnetic Force are intro-duced. When appropriate parameters are chosen, some of these technologies can decrease welding residual distortion of thin-plate butt weld-ments in aluminum alloy to a very low level and prevent the generation of welding hot cracking effectively.
Keywords:aluminum alloy  welding stress  welding in-process control  distortion  hot cracking
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