为了提高镍基堆焊层的耐磨性能,采用改进型等离子堆焊枪,从等离子焰尾部将镍包碳化硅陶瓷粉末注入堆焊熔池,在4CrSMoSiV1模具钢表面制备碳化物陶瓷增强复合焊层.X射线衍射分析表明采用枪外熔注制备的堆焊层组织中含有大量原位生成的碳化物和大量的硅化物与硼化物;金相显微分析表明堆焊层颗粒状碳化物组织分布均匀,碳化物粒度沿焊层表面至堆焊界面依次减小;常温及高温摩擦磨损试验表明制备的堆焊层具有较高的显微硬度与优异的耐高温磨损性能.
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