高温钛合金Ti55/Ti60真空电子束焊接  

Electron beam welding of dissimilar high temperature titanium alloy Ti55 and Ti60

作　　者：张秉刚[1] 陈国庆[1] 郭栋杰[1] 刘成来[2] 

机构地区：[1]哈尔滨工业大学现代焊接生产技术国家重点实验室,哈尔滨150001 [2]沈阳黎明航空发动机(集团)有限责任公司,沈阳110043

出　　处：《焊接学报》2009年第12期5-8,共4页Transactions of The China Welding Institution

基　　金：哈尔滨工业大学优秀团队支持计划资助项目

摘　　要：对Ti55与Ti60合金薄板进行了电子束焊接,研究了电子束焊接工艺参数对接头组织及力学性能的影响.结果表明,焊缝区形成大量针片状的α′马氏体,焊缝中心为粗大的柱状晶.焊接工艺参数对焊缝组织和接头抗拉强度有一定影响,接头室温抗拉强度高于母材,600℃时接头抗拉强度与Ti60母材相当,抗弯强度达到母材的80%左右,冲击韧度能够达到母材的90%以上,断裂发生在热影响区处,为韧性断裂.Ti55 and Ti60 titanium alloy sheets were welded by electron beam,and the influences of parameters on microstructure and mechanical properties of welding joints were studied.The results show that weld zone is characterized by acicular α′ martensite plate,and weld center is formed by coarse columnar crystals.Welding parameters can affect microstructure and tensile strength to a certain extent.At room temperature,the tensile strength of joint is higher than that of base metal.At a higher temperature of 600 ℃,tensile strength of joint is about equal to that of Ti60,and bending strength can be up to 80% of that of base metal,even impact toughness also can be larger than 90% of base metal.Failure occurs in heat-affected zone,and the fracture mode shows toughness characteristic.

关 键 词：Ti55/Ti60 电子束焊接 微观组织 力学性能 

分 类 号：TH456.3[机械工程—机械制造及自动化]