铝合金-不锈钢螺栓管接头复合火焰钎焊工艺及组织分析  

Hybrid flame brazing process and microstructures analysis of aluminium alloy and stainless steel screw tube joints

作　　者：吕世雄[1] 敬小军[1] 于冲冲[1] 郭丽[2] 

机构地区：[1]哈尔滨工业大学先进焊接与连接国家重点实验室,150001 [2]中国北车集团大连机车研究所有限公司,116000

出　　处：《焊接》2012年第4期35-39,70,共5页Welding & Joining

基　　金：国家自然科学基金项目(50974046和50904020);哈尔滨市青年科技创新人才(2009RFQXG050)

摘　　要：提出了丙烷焰和乙炔焰复合加热的双火焰钎焊工艺,用于铝合金-不锈钢螺栓管接头钎焊。通过金相分析和力学性能试验,分析了钎焊工艺条件对钎料的润湿铺展行为以及接头组织性能的影响。研究表明,钎料在铝合金-不锈钢界面润湿铺展的关键在于控制丙烷焰和乙炔焰加热间隔。合适的间隔时间和接头装配间隙可获得填充致密、结合良好、性能满足使用要求的铝合金-不锈钢螺栓管接头,为铝合金板式散热器的工业生产提供了技术参考。A hybrid flame brazing process to braze aluminium alloy and stainless steel screw tube joints was proposed,which consisted of a propane flame and an ethyne flame.The microstructures and mechanical properties were analyzed by observation of metallographic structures and mechanical properties experiments.It has been concluded that the key parameter to control wetting and spreading behavior of liquid filler metal between aluminium alloy and stainless steel was the heating intervals of the two flames.The sound joints of aluminium alloy and stainless steel screw tube joints with excellent joining quality can be obtained with the proper right heating intervals and assembly gaps.This study can provide technical references for the industrial production of plate radiators.

关 键 词：火焰钎焊 铝合金 不锈钢 金相组织 

分 类 号：TG446[金属学及工艺—焊接]