锻造对RE-WC-钢复合材料组织与耐磨性的影响  

Influence of forging on the structure and the wear resistance of RE-WC-steel composite

作　　者：杜晓东[1] 丁厚福[1] 郑玉春[1] 许淑珍 

机构地区：[1]合肥工业大学材料学院,安徽合肥230009 [2]中汽重汽集团职教中心,山东济南250014

出　　处：《材料科学与工艺》2006年第6期577-579,584,共4页Materials Science and Technology

基　　金：安徽省科技攻关重点资助项目(06022003);合肥工业大学科学研究发展基金资助项目(040300F)

摘　　要：为了研究锻造对电冶重熔稀土-WC-钢复合材料耐磨性的影响,对电冶重熔稀土-WC-钢复合材料锻造后经适当热处理,利用MM-200磨损试验机测试合金锻造前后和锻后不同热处理工艺下的摩擦磨损特性和力学性能,利用光学显微分析技术、SEM技术分析了磨损前后合金组织、摩擦面形貌及其磨损机理.结果表明:锻造使RE-WC-钢基合金冲击韧性明显提高,硬质相桥接减少,摩擦表面硬质相剥落减小,合金的耐磨性明显提高;锻后1150℃加热淬火、150℃×2 h回火后合金耐磨性最好.In order to investigate the influence of forging on the wear resistance of the RE-WC-steel composite made by eleetroslag remelting process, the RE-WC-steel composite was heat treated properly after forging. The MM - 200 wear tester was used to test the wear characteristic and the mechanic properties of the composite before and after forging, and with various heat-treatment processes. The alloy＇ s mierostrueture, morphology of wear surface and wear mechanism were investigated by means of optical microscope technology and SEM method. The results showed that the forging process increased the impact toughness of the RE-WC-steel composite, decreased the bridge connection of the hard particles, diminished spalling of hard particles on the wear surface and enhanced the wear resistance of tested alloy obviously. After forging, heating at 1150 ℃ followed by quenching and tempering at 150 ℃ for 2 hours, the wear resistance of tested alloy was optimum.

关 键 词：钢结合金 稀土 耐磨性 锻造 显微组织 电冶重熔 

分 类 号：TB302.3[一般工业技术—材料科学与工程]