含硅中碳低合金钢的组织与冲击磨料磨损行为  

Microstructure and impact abrasive wear behavior of medium carbon low alloy steel containing silicon

作　　者：张治国[1] 陈德东[1] 李卫[1] 

机构地区：[1]暨南大学材料系,广东广州510632

出　　处：《材料热处理学报》2013年第9期85-89,共5页Transactions of Materials and Heat Treatment

基　　金：广东省教育部产学研结合项目(2009B090300288);广东省中国科学院全面战略合作项目(2010B090300059);广东省科技计划重大专项项目(2011A080802003)

摘　　要：试验研究了硅含量对中碳低合金耐磨钢组织、力学性能以及耐磨性能的影响。结果表明,基体中主要组织为板条状马氏体并伴有一定量针状马氏体。随硅含量增加针状马氏体数量增多,导致硬度略有提高,而冲击韧度则在硅含量高于0.97%后不同程度降低。低冲击功下,随含硅量升高钢磨损量增加;而高冲击功下随含硅量增加钢磨损量降低。在冲击磨料磨损工况下钢表层马氏体板条束纤维化,出现了加工硬化,由于硅的固溶强化和针状马氏体增多,含硅量较高钢加工硬化效果更明显。Effects of Si content on microstructure, mechanical properties and wear-resistant properties of medium carbon low alloy steel were investigated. The results show that the microstructure of the steel mainly consists of lath martensite with some needle-type martensite. With increasing Si content, the amount of needle-type martensite increases, resulting in a slight increase of hardness. However, the impact absorbing energy decreases in various degree when Si content exceeds 0. 97% （ mass fraction）. With increasing Si content the worn mass loss increases under low impact energy, whereas it decreases under high impact energy. The phenomenon can be attributed to the work-hardening effect from the formation of martensite fiber on the abrasive surface. The sample containing high Si contents demonstrates better work-hardening effect because of the Si solution strengthening effect and the increase of needle-type martensite.

关 键 词：合金钢 硅含量 组织结构 冲击磨料磨损 加工硬化 

分 类 号：TG142.3[一般工业技术—材料科学与工程]