为了降低渗硼层的脆性,提高其耐磨性,对20G钢渗硼层进行了氩弧重熔处理,研究了渗硼层重熔前后的形貌、相结构、显微硬度及耐磨性。结果表明:渗硼层由FeB和Fe2B两相组成,经氩弧重熔处理后FeB相消除,氩弧重熔渗硼层由Fe23(C,B)6和Fe2B相组成,包括氩弧重熔区和过渡区;氩弧重熔处理使渗硼层表层微观硬度降低,且使其表面至基体方向的硬度梯度变缓;氩弧重熔能明显改善渗硼层的耐磨性。
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