采用等离子熔覆(PTA)在Q235钢上制备含亚微米碳化铌Fe-Cr-B-C-Nb熔覆层,通过改变合金成分,分别设计含超细碳化铌、含共晶硼化物、含超细碳化铌+共晶硼化物、含超细碳化铌+初生Fe2B硬质相的熔覆层,研究不同尺寸硬质相对Fe-Cr-B-C-Nb熔覆层组织与性能的影响,并与市售常用Fe-Cr-C耐磨材料对比.结果表明:细小硬质相有助于改善合金冲击变形能力,含亚微米碳化铌和共晶硼化物的合金具有优良的综合性能,耐磨性为Fe-Cr-C耐磨材料的4倍多,且冲击变形能力优于Fe-Cr-C耐磨材料.
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