钎缝间隙对316L不锈钢真空钎焊接头组织的影响  

Effect of Brazing Clearance on the Vacuum Brazed Joint Microstructure of 316L Stainless Steel

作　　者：于治水[1] 石昆[1] 言智[1] 李军[1] 李瑞峰[2] 

机构地区：[1]上海工程技术大学材料工程学院,上海201620 [2]华东船舶工业学院材料科学与工程学院,江苏镇江212003

出　　处：《材料工程》2010年第10期77-81,共5页Journal of Materials Engineering

摘　　要：采用镍基钎料BNi2+40%BNi5对316L不锈钢进行真空钎焊。主要通过光学显微镜、电子探针显微分析仪、硬度计等研究了3种钎缝间隙下钎焊接头的显微组织、钎缝成分分布以及钎缝显微硬度。结果表明316L不锈钢的钎焊接头主要由固溶体、共晶组织及网状化合物组成,硼、硅是导致化合物相产生的主要合金元素;随着钎缝间隙的减小,钎焊接头中金属间化合物相的含量逐渐减小,当钎缝间隙为30μm时,接头组织基本为固溶体。Vacuum brazing with nickel-based filler metal BNi2＋40%BNi5 was carried out for brazing of 316L stainless steel.Microstructure of joints brazed,element distribution and micro-hardness are evaluated under different brazing clearance by optical microscope,electron probe microanalyzer and micro-hardness meter.The results show that joints brazed consists of solid solutions,eutectic structures and meshwork compounds,boron and silicon are the main compounds formed elements in joints brazed;the mounts of intermetallic compounds decreased with the decrease of the brazing clearance,the microstructure of the joints brazed is mainly solid solution when the brazing clearance is 30μm.

关 键 词：316L不锈钢 真空钎焊 镍基钎料 

分 类 号：TG454[金属学及工艺—焊接]