Effect of intermetallic compounds on heat resistance of hot roll bonded titanium alloy-stainless steel transition joint  

金属间化合物对钛合金与不锈钢的热轧焊过渡接头耐热性的影响(英文)

作　　者：赵东升[1] 闫久春[2] 刘玉君[1] 

机构地区：[1]大连理工大学 工业装备结构分析国家重点实验室船舶工程学院,大连116024 [2]哈尔滨工业大学 先进焊接与连接国家重点实验室,哈尔滨150001

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第7期1966-1970,共5页中国有色金属学报（英文版）

基　　金：Project(AWPT-M07)supported by the State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology

摘　　要：The effect of intermetallic compounds on the heat resistance of transition joint was investigated. The experiment of post-weld heat treatment for the hot roll bonded titanium alloy-stainless steel joint using nickels interlayer was carried out, and the interface microstructure evolution due to heat treatment was presented. There was not found significant interdiffusion at stainless steel/nickel interface, when the specimens were heat treated in the temperature range of 600-800 °C for 10 and 30 min, while micro-cracks occurred at the stainless steel/nickel interface heat treated at 700 °C for 30 min. The thickness of intermetallic layers at nickel/titanium alloy interface increased at 600 °C, and micro-cracks occurred at 700 and 800 °C. The micro-cracks occurred between intermetallic layers or between intermetallic layer and nickel interlayer as well. The tensile strength of the transition joint decreased with the increase of heat treatment temperature or holding time.研究金属间化合物对过渡接头耐热性的影响,采用镍中间层的钛与不锈钢热轧焊接头的焊后热处理方法,研究焊后热处理引起的连接界面微观组织演变。结果表明：当热处理温度为600-800°C,热处理时间为10min和30min时,在不锈钢与镍的连接界面处没有发生明显的互扩散。但是,当热处理温度为700°C热处理时间为30min时,在不锈钢与镍的连接界面出现微裂纹。热处理温度为600°C时,镍与钛合金的连接界面的金属间化合物层的厚度增大,而热处理温度为700和800°C时,界面出现微裂纹。微裂纹产生在金属间化合物层之间或者是金属间化合物层与镍层之间。过渡接头的拉伸强度随着热处理温度的升高或时间的延长而降低。

关 键 词：INTERMETALLICS titanium alloy stainless steel transition joint heat resistance heat treatment hot roll bonding 

分 类 号：TG441.8[金属学及工艺—焊接]