MA-SPS法制备WC颗粒增强钢基复合材料的耐磨性研究
Study on Wear Resistance of WC Particulate Reinforced Steel Matrix Composite Prepared by Mechanical Alloying and Spark-plasma Sintering
谢金乐, 刘允中, 吴汇江, 肖文华
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作者单位：(华南理工大学 机械与汽车工程学院 国家金属材料近净成形工程技术研究中心, 广东 广州 510640)
中文关键字：MA-SPS； 耐磨性； 耐磨机理
英文关键字：MA-SPS; wear resistance; wear mechanism
中文摘要：采用机械合金化和放电等离子体法(MA-SPS)制备了WC颗粒增强钢基复合材料，对复合材料的组织形貌、耐磨性及耐磨机理进行研究。结果表明：该方法改善了复合材料的组织形貌，晶粒比较细小且均匀；同时显著提高了材料的硬度和耐磨性，随WC含量的增加，复合材料的致密度、硬度和耐磨性增加，最高硬度达70 HRC，相比基体材料的耐磨性提高了8倍；该材料的主要磨损机制为粘着磨损和磨粒磨损。
英文摘要：WC particulate reinforced steel matrix composite was prepared by MA-SPS (mechanical alloying and spark plasma sintering). The morphology, wear resistance and wear mechanism of the composite were studied. The results indicate that the method significantly improves the morphology. The size and distribution of the grain is very small and uniform,respectively. With the increase of WC content, the relative density, hardness and wear resistance of the composite increase. The maximum hardness is up to 70 HRC and the highest wear resistance of the composite is 8 times higher than that of the steel matrix. The main wear mechanism is adhesive wear and abrasive wear.