TC4合金电子束焊接接头微观组织研究  

Microstructures of TC4 Alloy Weld Joints by Electronic Beam Welding

作　　者：彭周[1] 胡永刚[1] 陈国珠[1] 夏风[1] 武玺旺[1] 胡树兵[1] 王亚军[2] 肖建中[1] 

机构地区：[1]华中科技大学材料成型与模具技术国家重点实验室,武汉430074 [2]北京航空制造工程研究所,北京100083

出　　处：《材料工程》2010年第5期47-50,55,共5页Journal of Materials Engineering

基　　金：国家重大基础研究项目(61362)

摘　　要：对不同工艺参数电子束流焊接TC4钛合金焊缝显微组织进行分析,结果表明：电子束流工艺参数的改变对焊缝的相组成没有影响,却使得焊缝形状及其显微组织分布发生了改变,产生了焊缝显微组织梯度。焊缝夹角越大,焊缝上中下各部位马氏体针尺寸梯度越大。焊缝中显微硬度比母材硬度高HV30-50,热影响区中显微硬度呈梯度分布。The microstructures of TC4 weld beads by electronic beam welding（EBW） with different welding parameters were studied.The results show that the shapes of weld bead are different with the change of the weld parameters,but the phases in weld seam are almost the same.The microstructure gradient in weld seam is dependent on the shape of the weld bead.The larger the angle of seam is,the larger of the size gradient of martensite gets.The micro-hardness in weld bead is HV30-50 than that of the base material.The micro-hardness in the different shape of weld beads is consistent with the microstructures gradient in the weld bead.

关 键 词：TC4钛合金 电子束焊 焊缝形貌 马氏体 组织梯度 

分 类 号：TB332[一般工业技术—材料科学与工程]