【摘要】 为了提高铸铁表面的耐磨性，以ＨＴ２００为试验材料，用钨极氩弧对其进行了局部重熔强化的系统研究，得出了相关工艺参数对重熔处理后表层组织和性能的影响规律。同时与镍基自熔合金喷焊及铸铁激冷处理表面强化法做了对比试验，结果表明，铸铁钨极氩弧重熔后激冷法是有效提高其耐磨性，发挥自身潜力，降低成本的一项新工艺。更多还原

【Abstract】 To improve the resistance to abrasion for surface of cast iron,the wear resistibility of grey cast iron HT200 is increased by employing inert gas tungsten arc remelt and fast solidified.The effect of current and arc moving rate on the chilling layer microstructure and some properties are studied.The results are compared with those of spray coating by nickel alloys and cast iron chilled treating and it proved that rapid chilling of A type cast iron by tungsten inert shielded gas arc melting as an energy source is much better and cheaper technique than others.And also promises to provide a new method for controlling microstructure and properties.更多还原