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QCr0.8/TC4薄板电子束焊接头组织及断裂路径 被引量:8
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作者 刘伟 赵海生 +1 位作者 何景山 张秉刚 《焊接学报》 EI CAS CSCD 北大核心 2007年第8期81-84,共4页
对QCr0.8/TC4异种材料薄板进行了电子束对接焊接试验。采用光学金相、扫描电镜、能谱分析及X射线衍射相分析等方法,对接头组织结构及相组成进行了分析。并对接头进行了性能测试及断口形貌观察,分析了断裂性质,探讨了断裂路径。结果表明... 对QCr0.8/TC4异种材料薄板进行了电子束对接焊接试验。采用光学金相、扫描电镜、能谱分析及X射线衍射相分析等方法,对接头组织结构及相组成进行了分析。并对接头进行了性能测试及断口形貌观察,分析了断裂性质,探讨了断裂路径。结果表明,焊缝由大量的γ-CuTi相、金属间化合物CuTi2,CuTi3及少量的铜基固溶体组成,且靠近铜合金侧存在一层20μm左右的反应层,推测其可能为Ti2Cu,CuTi,Cu4Ti3,Cu2Ti,Cu3Ti等多种金属间化合物混合层;QCr0.8/TC4的电子束对中焊接性较差,接头断裂发生在焊缝中心的粗晶区,呈明显的解理断裂特征,接头抗拉强度很低,仅为82.1MPa。 展开更多
关键词 qcr0.8青铜 TC4钛合金 电子束焊接 组织 断裂
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Electron beam welding of 304 stainless steel to QCr0.8 copper alloy with copper filler wire 被引量:6
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作者 张秉刚 赵健 +1 位作者 李晓鹏 冯吉才 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第12期4059-4066,共8页
Electron beam welding (EBW) of 304 stainless steel to QCr0.8 copper alloy with copper filler wire was carried out. Orthogonal experiment was performed to investigate the effects of process parameters on the tensile ... Electron beam welding (EBW) of 304 stainless steel to QCr0.8 copper alloy with copper filler wire was carried out. Orthogonal experiment was performed to investigate the effects of process parameters on the tensile strength of the joints, and the process parameters were optimized. The optimum process parameters are as follows:beam current of 30 mA, welding speed of 100 mm/min, wire feed rate of 1 m/min and beam offset of-0.3 mm. The microstructures of the optimum joint were studied. The results indicate that the weld is mainly composed of dendriticαphase with little globularεphase, and copper inhomogeneity only occurs at the top of the fusion zone. In addition, a melted region without mixing exists near the weld junction of copper side. This region with a coarser grain size is the weakest section of the joints. It is found that the microhardness of the weld decreases with the increase of the copper content in solid solution. The highest tensile strength of the joint is 276 MPa. 展开更多
关键词 304 stainless steel qcr0.8 copper alloy electron beam welding dissimilar joint mechanical properties
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AgCu钎料钎焊TC4钛合金与QCr0.8铬青铜接头界面结构及性能 被引量:6
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作者 康佳睿 宋晓国 +2 位作者 胡胜鹏 曹健 冯吉才 《焊接学报》 EI CAS CSCD 北大核心 2018年第4期27-30,共4页
采用AgCu28钎料实现了TC4钛合金与QCr0.8铬青铜的真空钎焊,利用SEM,EDS以及XRD等分析方法确定TC4/AgCu/QCr0.8接头的典型界面结构为TC4钛合金/CuTi+Cu_3Ti_2+CuTi_2/Ag(s,s)+Cu_4Ti/Ag(s,s)+Cu(s,s)/QCr0.8铬青铜.研究了工艺参数对接头... 采用AgCu28钎料实现了TC4钛合金与QCr0.8铬青铜的真空钎焊,利用SEM,EDS以及XRD等分析方法确定TC4/AgCu/QCr0.8接头的典型界面结构为TC4钛合金/CuTi+Cu_3Ti_2+CuTi_2/Ag(s,s)+Cu_4Ti/Ag(s,s)+Cu(s,s)/QCr0.8铬青铜.研究了工艺参数对接头组织和性能的影响.结果表明,随着钎焊温度和保温时间的增加,钎缝中银铜共晶组织减少,钛铜化合物增多.接头抗剪强度随钎焊温度的升高先增加后降低,在钎焊工艺参数为890℃/0min时,获得最大抗剪强度449MPa.保温时间的延长使得接头脆性钛铜化合物增多,接头性能下降,因此随保温时间延长接头抗剪强度显著降低. 展开更多
关键词 TC4钛合金 qcr0.8青铜 钎焊 界面结构 抗剪强度
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