B对ZG40MnCr组织和性能的影响  

Influence of B on Microstructure and Properties of ZG40MnCr

作　　者：孙玉福[1] 刘金庆[1] 王璐[1] 赵靖宇[1] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2011年第1期59-63,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省教育厅科技攻关资助项目(072102260023)

摘　　要：针对低合金钢ZG40MnCr淬透性和淬硬性不足的问题,研究了合金元素硼对ZG40MnCr组织、力学性能及耐磨性能的影响.结果表明:当B的质量分数为0.005 9%,经880℃淬火+300℃回火处理后,该铸钢具有良好的力学性能,硬度达到54.2 HRC,冲击功达到24.6 J,获得的组织为回火马氏体+少量残余奥氏体+少量碳化物,耐磨性与不加硼元素时相比提高了约21%.The influence of B addition on the microstructure,properties and wear resistance of ZG40MnCr was studied in this paper to solve the problem that the low alloy steel possesses favorable wearability yet lower hardenability at abrasive wear operating condition.The result showed that when adding 0.005 9% B and after quenching at 880 ℃and tempering at 300 ℃,the better performance of ZG40MnCr can be obtained,the hardness and impact toughness reached 54.2 HRC and 24.6 J,the microstructure consisted of tempered martensite and residual austenite and trace amount of carbide,and the wear resistance improved 21% compared with the steel without B addition.

关 键 词：ZG40MnCr B 组织 性能 耐磨性 

分 类 号：TG142[一般工业技术—材料科学与工程]