钎剂复合4047钎料组织及钎焊性能分析  

Research on Microstructure and Brazing Properties of Flux-Containing 4047 Filler Metals

作　　者：王博 龙伟民[1] 娄银斌 邓建峰 关绍康 费文潘[1] 王水庆 张雷 Wang Bo;Long Weimin;Lou Yinbin;Deng Jianfeng;Guan Shaokang;Fei Wenpan;Wang Shuiqing;Zhang Lei(China Innovation Academy of Intelligent Equipment Co.,Ltd,Ningbo 315700,China;Zhejiang Xinrui Brazing Technology Co.,Ltd,Shengzhou 312000,China;Henan Key Laboratory of Advanced Magnesium Alloy,Zhengzhou University,Zhengzhou 450002,China)

机构地区：[1]中机智能装备创新研究院(宁波)有限公司,浙江宁波315700 [2]浙江新锐焊接科技股份有限公司,浙江嵊州312000 [3]郑州大学河南省先进镁合金重点实验室,河南郑州450002

出　　处：《稀有金属材料与工程》2022年第5期1919-1925,共7页Rare Metal Materials and Engineering

基　　金：河南省重大关键技术需求揭榜攻关项目(191110111000);异质增材钎涂材料及技术装备浙江省工程研究中心;宁波市“3315”人才计划2020年创新团队C类。

摘　　要：采用粉末锻造法制备了钎剂复合型铝硅共晶4047复合钎料,并对比研究了自制钎剂复合4047钎料与市售药芯钎料、进口钎剂复合钎料的组织与钎焊性能。结果表明:钎剂复合4047钎料存在2个吸热峰,钎剂熔点略低于钎料合金熔点。钎剂复合4047钎料的润湿铺展面积为363 mm^(2),与进口钎料(353 mm^(2))接近,二者均优于药芯钎料(311 mm^(2))。在85%湿度、35℃环境条件下,钎剂复合4047钎料与进口钎料的抗吸潮性优良,药芯钎料放置72、144、216 h的吸潮率分别为3.88%、4.02%、4.27%,钎剂吸潮增重明显。钎剂复合4047钎料组织分析结果表明,钎剂颗粒被钎料合金包裹、固定在基体组织内,钎剂尺寸细小、分布均匀,压实系数高。钎剂复合4047钎料钎焊性能较好,钎缝区组织致密,钎着率高,6061/3003搭接接头断裂强度平均达107.5 MPa,断裂发生在3003侧热影响区。A novel flux-containing 4047 composite brazing filler metal was prepared by powder forging method.The microstructure and brazing performances of the self-made composite filler metal,commercial flux-cored and imported brazing filler metal were investigated comparatively.Experimental results show that there are two endothermic peaks in the melting curve of the self-made composite filler metal,and the melting point of flux is relatively lower than that of the 4047 filler alloy.The spreading area of the self-made composite filler metal is 363 mm^(2),which is close to that of imported filler metal(353 mm^(2))and is significantly larger than that of flux-cored ones(311 mm^(2)).Under the environmental conditions of 85%humidity and 35℃,the self-made and imported filler metals show excellent moisture absorption resistance,while the flux-cored one shows a remarkable increase in mass due to moisture absorption of flux.The moisture absorption rates of the flux-cored ones placed in humid environment for 72,144 and 216 h are 3.88%,4.02%and 4.27%,respectively.The results of microstructure analysis show that the flux particles of the self-made composite filler metal are small in size and evenly distributed,which are firmly wrapped in the matrix of the 4047 filler alloy.The average fracture strength of the brazed AA6061/AA3003 dissimilar lap joints is 107.5 MPa,and the fracture position is located in heat-affected zone of the AA3003 side.The dense structure of the brazed seam shows that the self-made composite filler metal has good brazing performance and high brazed rate.

关 键 词：铝硅钎料 抗吸潮性 显微组织 力学性能 

分 类 号：TG425.2[金属学及工艺—焊接]