2010•Cailiao gongchengRequires access
Effect of Brazing Clearance on the Vacuum Brazed Joint Microstructure of 316L Stainless Steel
Ruifeng Li
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Abstract
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.