搅拌摩擦焊工艺参数对LY12铝合金焊缝金属流动形态的影响
Effects of Process Parameters on Flow Pattern of LY12 Aluminum Alloy during Friction Stir Welding
摘 要
采用铝箔作为标示材料,研究了旋转速度、焊接速度、下压量等工艺参数对LY12铝合金搅拌摩擦焊焊缝金属流动形态的影响.结果表明:焊缝金属的流动形态由4个特征区域组成,即水平流动区、紊流区、“洋葱环”区和刚塑性迁移区;搅拌摩擦焊的焊缝关于中心不对称,返回边标示材料的变形程度比前进边的大;随着旋转速度的提高,金属在焊缝厚度方向向上的迁移量先增大后减小;随着焊接速度的提高,金属向上迁移的最大位移减小;增大下压量,有利于金属的流动和焊缝致密度的提高.
LY12铝合金
工艺参数
金属流动
friction stir welding
LY12 aluminum alloy
process parameter
metal flow
Abstract
Using the aluminum foil as a tracer material,friction stir welding was conducted with different process parameters.The effect of rotating velocity,welding speed and plunge depth on the weld transverse section morphology was studied.The results showed that the metal flow in the weld was composed of four characteristic zones,i.e.,flow zone,turbulence zone,onion zone and rigid plastic transfer zone.The weld was unsymmetric about the center line,and the deformed intensity of the tracer material on the retreating side (RS) was higher than that on the advancing side(AS).With the increase of the rotating velocity,the highest upward displacement of the metal in weld thickness initially increased and then decreased.With the increase of the welding speed,the highest upward displacement of the metal decreased.It was favorable for metal flow and improvement of compactness of the weld with the increase of plunge depth of the tool.
中图分类号 TG146.2 TG401
所属栏目 材料性能及其应用
基金项目 江西省自然科学基金资助项目(0450090)
收稿日期 2007/12/22
修改稿日期 2008/2/1
网络出版日期
作者单位点击查看
备注李宝华(1982-),男,湖北孝感人,硕士研究生.
引用该论文: LI Bao-hua,KE Li-ming,XING Li,HUANG Yong-de. Effects of Process Parameters on Flow Pattern of LY12 Aluminum Alloy during Friction Stir Welding[J]. Materials for mechancial engineering, 2009, 33(1): 55～58
李宝华,柯黎明,邢丽,黄永德. 搅拌摩擦焊工艺参数对LY12铝合金焊缝金属流动形态的影响[J]. 机械工程材料, 2009, 33(1): 55～58
被引情况:
【1】董学伟,黎向锋,左敦稳,汪洪峰,王吉胜,董春林,李光, "7022铝合金搅拌摩擦焊接全过程温度场的数值模拟",机械工程材料 36, 92-96(2012)
【2】张亮,王少刚,马启慧,吴新强, "2024铝合金电子束焊接接头的显微组织与力学性能",机械工程材料 34, 48-50(2010)
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参考文献
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