熔剂对高频熔敷Cr13Ni2B耐磨层工艺性能的影响

采用高频感应加热在低碳钢表面熔敷一层铁基Cr13Ni2B耐磨材料，研究了熔剂配比对覆层与基体的结合、覆层表面成形和脱渣性等工艺性能的影响。结果表明：在高频熔敷铁基Cr13Ni2B耐磨层时，熔剂中的硼酐对其工艺性能影响比较显著，焊剂431次之，氟化物的影响不显著；加入适量的熔剂，可有效地去除粉料表面的氧化物，降低其熔点，使脱渣容易、表面成形美观，覆层厚度可达2．5mm;适量熔剂可促使覆层与基体形成牢固的冶金结合；在铁基Cr13Ni2B合金粉末中加入3％硼酐、8％-12％焊剂431并配以1％左右的萤石或冰晶石时，高频熔敷效果最好。

Effect of Welding Fluxes on the Technologic Property of Depositing Wear-resisting Layer Cr13Ni2B with High Frequency Induction Heating

High frequency induction heat has been used to obtain a wear-resisting layer Cr13Ni2B on the surface of mild steel. Effect of welding fluxes on technologic property such as the combination ability of the layer with the base metal, surface quality, detachability, were studied. The results show that the amount of boric anhydride produce a comparatively marked effect on the technologic property of the wear-resisting layer Cr13Ni2B, and then welding flux 431, and fluoride litde. Adding the right amount of fluxes can remove the oxide of powder material surface, and depress the melting point of the powder efficiently, and the slag on it can easily brush off, and finally get a wear-resisting layer whose surface is fine with expectant thickness which can get to 2. 5 mm. The right amount of fluxes can spur the layer firmly metallurgical joint the underside steel Adding 3wt% boric anhydride and 8wt%-12wt% welding flux 431 and 1wt% fluorite or cryolite into the alloy powder Cr13Ni2B, the effect of high frequency induction heating deposit is the best.