碳钢不锈钢Ni-Mo-P非晶钎料焊接工艺及性能研究  

Brazing Process and Performance of Carbon Steel/Stainless Steel by Amorphous Ni-Mo-P Filler Metal

作　　者：林旭[1] 吕永超[1] 张文书[1] 马立群[1] 丁毅[1] 孟宪虎[2] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]江苏众信绿色管业科技有限公司,江苏南京210012

出　　处：《热加工工艺》2015年第5期50-52,57,共4页Hot Working Technology

摘　　要：采用单辊急冷技术制备了Ni86Mo6P8、Ni82Mo10P8、Ni78Mo14P8三种非晶合金条带,采用XRD和DSC分析了钎料的物相组成和熔化特性,将其用于不锈钢和碳钢的钎焊;并设计剪切强度正交试验研究钎焊影响因素,对钎焊接头显微组织和剪切断口形貌进行了对比分析。结果表明:制备的三种Ni-Mo-P合金条带均为非晶态。非晶形成能力按从高到低排序为:Ni78Mo14P8>Ni82Mo10P8>Ni86Mo6P8。影响钎焊接头剪切强度的因素顺序为:合金配比>钎焊温度>保温时间。正交试验中剪切强度最高的试样比强度最低试样:焊缝组织中含脆性化合物的共晶组织减少,铁镍固溶体组织增多;剪切断口韧窝更细而均匀。Ni86Mo6P8, Ni82Mo10P8 and Ni78MO14P8 amorphous alloy filler metal ribbons were prepared by rapid solidification. The phase of filler metal was investigated by XRD, and the melting behaviour was investigated by DSC. The amorphous ribbons were used for brazing stainless steel and carbon steel. A shear strength orthogonal experiment was designed to study the brazing influence factors. The microstructure of the soldered joint and shearing fracture morphology were contrastive analysis. The results show that the phase of three Ni-Mo-P ribbons are single amorphous. The amorphous formation ability from high to low is： Ni78Mo14P8 〉Ni82Mo10P8 〉Ni86Mo6P8. The order of factors influencing the shear strength is： alloy formula 〉brazing temperature 〉holding time. Compared the sample of highest shear strength with the lowest, the eutectic microstructure consists of a few brittle compounds in weld joint, and FeNi phase solid solution microstructure increases, and the dimple fracture is fine and uniform.

关 键 词：碳钢 / 不锈钢 镍钼磷 非晶钎料 焊接 

分 类 号：TG454[金属学及工艺—焊接] TG425