真空钎焊6063铝合金蜂窝板微观组织  

Microstructure of vacuum brazed 6063 aluminum alloy honeycomb plate

作　　者：李云月 李秀朋 沈元勋 王路乙 裴夤崟 浦娟[2] Li Yunyue;Li Xiupeng;Shen Yuanxun;Wang Luyi;Pei Yinyin;Pu Juan(Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,State Key Laboratory of Advanced Brazing Filler Metals and Technology,Zhengzhou 450001,China;Jiangsu University of Science and Technology,Zhenjiang 212000,Jiangsu,China)

机构地区：[1]郑州机械研究所有限公司,新型钎焊材料与技术国家重点实验室,郑州450001 [2]江苏科技大学,江苏镇江212000

出　　处：《焊接》2023年第12期6-11,16,共7页Welding & Joining

基　　金：郑州市重大科技创新专项(2020CXZX0060)。

摘　　要：采用4004钎料真空钎焊6063铝合金蜂窝板,研究了不同蜂窝芯厚度对钎焊接头微观组织的影响。结果表明,在钎焊温度为585℃、保温时间为20 min时,厚度为0.10 mm蜂窝芯无法钎焊成形。3种不同厚度蜂窝芯均有熔蚀现象产生。当单层蜂窝芯厚度为0.10 mm和0.15 mm时,在钎焊界面反应区存在白色的Al-Si共晶相,其形貌在单层窝芯厚度0.10 mm时为块状,其形貌在单层窝芯厚度0.15 mm时为树枝状;当单层蜂窝芯厚度为0.21 mm时,白色的Al-Si共晶相消失,仅存在Si元素富集相。双层蜂窝芯厚度为0.10 mm的蜂窝板钎焊界面坍塌;当双层蜂窝芯厚度为0.15 mm时,界面反应区(富Si金属间化合物相)较大,但是芯材没有发生熔解现象,界面反应区与芯材之间也形成部分影响区(α-Al固溶体相),面板与界面反应区之间的影响区也小于双层蜂窝芯厚度为0.10 mm的影响区;当双层蜂窝芯厚度达到0.21 mm时,面板与界面反应区中间的影响区增大,芯材同样没有发生熔解现象,芯材界面反应区变小;即双层蜂窝芯脆性富Si金属间化合物减少,α-Al固溶体相增多。4004 brazing filler metal was used to vacuum braze 6063 aluminum alloy honeycomb plates,effect of different honeycomb core thickness on microstructure of brazed joints was investigated.The results showed that when brazing temperature was 585℃and holding time was 20 min,honeycomb core with thickness of 0.1 mm could not be brazed.Three kinds of honeycomb core with different thickness had melting erosion phenomenon.When monolayer honeycomb core thickness was 0.10 mm and 0.15 mm,there was white Al-Si eutectic phase in the reaction zone of brazing interface,and its morphology was block when monolayer honeycomb core thickness was 0.10 mm and dendritic when monolayer honeycomb core thickness was 0.15 mm.When monolayer honeycomb core thickness was 0.21 mm,white Al-Si eutectic phase disappeared and only Si element enriched phase existed.When bilayer honeycomb core thickness was 0.10 mm,the brazed interface collapsed.When bilayer honeycomb core thickness was 0.15 mm,interface reaction zone(Si-rich intermetallic compound phase)was larger,but core material was not dissolved,and part of influence zone(α-Al solid solution phase)was also formed between interface reaction zone and core material.Influence zone between panel and interface reaction zone was also smaller than that of 0.10 mm bilayer honeycomb core thickness.When bilayer honeycomb core thickness reached 0.21 mm,influence zone between panel and interface reaction zone increased,core material also was not dissolved,and core material interface reaction zone became smaller.In other words,brittle Si-rich intermetallic compounds in bilayer honeycomb core decreased,andα-Al solid solution phase increased.

关 键 词：铝蜂窝板 真空钎焊 微观组织 熔蚀 

分 类 号：TG454[金属学及工艺—焊接]