摘要
研究了瞬时液相扩散焊316L不锈钢用中间层合金的成分和相结构,分析了中间层合金成分及焊接工艺参数对接头组织和性能的影响.结果表明,Ni-Si-B中间层合金具有非晶态结构,在TLP焊接316L不锈钢过程中展现出良好的润湿性和填缝性,接头组织连续性好,基本上无焊接缺陷.焊缝组织为Ni(Fe)固溶体和少量Cr3C2化合物,母材组织无粗化,焊缝与母材组织具有相同的晶格结构.焊接工艺参数为升温速度50℃/s,焊接压力12.7 MPa,焊接温度1 150℃,保温时间10 min,合金元素扩散充分,Si元素向母材的扩散深度达35μm.接头性能较高,弯曲角达135°.
The component and phase structure of interlayer alloys for TLP bonding of 316L stainless steel have been studied and the effect of interlayer alloys component and welding parameters on microstructures and properties of joint have been analyzed.The results indicate that the amorphous Ni-Si-B interlayer alloys have an excellent wettability and gap filling capability during transient liquid-phase bonding of 316L stainless steel and the microstructure of bonding joint are continuous without welding defects.The microstructures of welding seam consist of Ni(Fe) and a small amount of Cr3C2 phase,the base metal has no coarsening with identical lattice structures as the welding seam.The optimized bonding parameters are 50 ℃/s heat rate,bonding temperature 1 150 ℃,holding time 10 min.The elements within joint diffuse sufficiently and the diffusion depth of Si in the base metal is about 35 μm.The joint shows higher mechanical properties and its bending angle reaches to 135°.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2011年第10期25-28,32,共5页
Transactions of The China Welding Institution
基金
陕西省科学技术研究发展计划资助项目(2009K06-14)
西安市科技局创新支撑计划资助项目(CXY08001)
陕西省重点学科建设专项资金资助项目
