2024铝合金电子束焊接接头的显微组织与力学性能
Microstructure and Mechanical Properties of 2024 Aluminium Alloy Joint by Electron Beam Welding
摘 要
采用电子束焊(EBW)对2024铝合金进行焊接,研究了接头的显微组织和力学性能.结果表明:接头焊缝显微组织呈细小的等轴晶,主要由α-Al基体相及其上分布着的θ(CuAl2)和S(Al2CuMg)强化相组成,热影响区为粗大的枝晶;接头的抗拉强度达到母材的80%左右,热影响区是强度最薄弱的部位;焊缝的硬度低于母材和热影响区的,且热影响区存在一定的软化现象;其拉伸断口呈典型的韧窝状断口,韧窝尺寸较小且均匀.
电子束焊接
显微组织
力学性能
2024 aluminium alloy
electron beam welding
microstructure
mechanical property
Abstract
2024 aluminium alloy was welded by electron beam welding (EBW).The microstructure and mechanical properties of welded joints were investigated.The results show that the microstructure of the weld zone was fine equiaxed grains,which mainly consisted of α-Al matrix phase and a few θ(CuAl2)and S(Al2CuMg)strengthening phases,while the heat-affected zone (HAZ)was composed of coarse dendrite.The tensile strength of the welded joint was about 80% of that of the base metal,and the HAZ was the weakest area of the joint.Microhardness of the weld metal was lower than that of both the base metal and HAZ,and a softening area existed in the HAZ.The joint tensile fracture present typical dimple fracture,while the dimples were fine and distributed uniformly.
中图分类号 TG444.7
所属栏目 新材料 新工艺
基金项目
收稿日期 2009/11/25
修改稿日期 2010/9/28
网络出版日期
作者单位点击查看
备注张亮(1984-),男,吉林长春人,硕士研究生.
引用该论文: ZHANG Liang,WANG Shao-gang,MA Qi-hui,WU Xin-qiang. Microstructure and Mechanical Properties of 2024 Aluminium Alloy Joint by Electron Beam Welding[J]. Materials for mechancial engineering, 2010, 34(12): 48～50
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[J]. 机械工程材料, 2010, 34(12): 48～50
被引情况:
【1】杨永和,李珞,徐震,陈旭, "X80管线钢疲劳裂纹的扩展行为",机械工程材料 39, 75-78(2015)
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参考文献
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【10】周振丰.焊接冶金学(金属焊接性)[M].北京:机械工业出版社,1996:132-133.
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