镍基单晶高温合金TLP扩散焊影响因素研究进展  

Research progress on influence factor of transient liquid phase diffusion bonding of nickel-based single crystal superalloy

作　　者：张永志 张红魁 陈捷狮 黄佳华 雷力明 Zhang Yongzhi;Zhang Hongkui;Chen Jieshi;Huang Jiahua;Lei Liming(AECC Commercial Aircraft Engine Manufacturing Co.,Ltd,Shanghai 201306,China;Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]中国航发上海商用航空发动机制造有限责任公司,上海201306 [2]上海工程技术大学,上海201620

出　　处：《焊接》2019年第9期32-38,I0021,I0022,共9页Welding & Joining

基　　金：上海市青年科技英才扬帆计划(18YF1424900)

摘　　要：对中间层合金、焊接工艺参数和母材晶体取向差对镍基单晶合金TLP扩散焊的影响进行了详细讨论。TLP扩散焊中间层成分设计较为成熟的方式是主要合金元素与母材成分相似,并以B为降熔元素;非晶箔带中间层相对于粉状中间层成分均匀且扩散速率快,有利于提高接头性能,是最适用的中间层形式;焊接温度、保温时间、焊接压力及焊后热处理等工艺参数应根据母材和接头性能要求以及加工工序合理选择;待焊试样晶体取向差应尽量减小或消除,避免接头中杂晶降低接头力学性能。Influence of interlayer alloy,welding parameter and crystal misorientation angle of base metal on the TLP joint of nikel-base single crystal superalloy is discussed in detail.Normally,the main alloying elements of interlayer alloy are similar to the base metal and B is selected as melting-point depressant.Owing to composition uniformity and fast diffusion rate in comparison to mealy interlayer alloy,morphous strip of interlayer alloy is beneficial to improve performance of the joint,which is the optimised state of interlayer alloy.Welding parameter,such as welding temperature,holding time,welding pressure and postweld heat treatment,should be selected rationally according to the performation requirement of base metal and joint,as well as processing procedure.To avoid the deleterious effect of stray grain on the mechanical properties of joint,crystal misorientation angle of welding samples should be minimized or eliminated.

关 键 词：镍基单晶合金 过渡液相扩散焊 中间层 焊接工艺参数 晶体取向差 

分 类 号：TG401[金属学及工艺—焊接]