【摘要】 采用熔覆铸造工艺在灰铸铁、球墨铸铁表面得到一层高铬铸铁基WC粒子增强复合材料 ,并研究了影响复合材料质量的工艺因素、复合材料的组织和耐磨粒磨损性能以及在农机具上的应用。结果表明 ,对表面复合材料质量最有影响的是铁水的浇注温度 ;与淬火 65Mn钢相比 ,复合材料的耐磨粒磨损性能提高 2 .9～ 4 .7倍。田间试验也表明 ,在灰铸铁表面熔覆铸造耐磨复合材料工艺能明显提高农机具的使用寿命。更多还原

【Abstract】 High-chrome cast iron matrix/ WC particles surface composites were achieved on grey iron and nodular cast iron by cast-in-place surface alloying, moreover, micro-structure, abrasive behavior and applying to farm tools of the composites were studied in this paper. The experimental results show that the main effect on quality of the composites is from the casting temperature,and then abrasive wear-resistance of the composites increases from 2.9 to 4.7 times compared with 65Mn steel quenched. The farm experimental results also indicate that the technology, making high-chrome cast iron matrix/ WC particles surface composite on grey iron,can raise the survive life of farm tool considerably.更多还原