热轧超高强钢M1200HS的显微组织与磨粒磨损性能  

Microstructure and Abrasive Wear Properties of Hot Rolled Ultra-High Strength Steel M1200HS

作　　者：彭欢[1] 胡学文[1] 王海波[1] 王承剑 石东亚 PENG Huan;HU Xuewen;WANG Haibo;WANG Chengjian;SHI Dongya(Technology Center,Ma’anshan Iron and Steel Co.,Ltd.,Ma’anshan 243000,China)

机构地区：[1]马鞍山钢铁股份有限公司技术中心,马鞍山243000

出　　处：《机械工程材料》2022年第1期68-72,84,共6页Materials For Mechanical Engineering

基　　金：安徽省科技重大专项资助项目(18030901075)。

摘　　要：采用热轧和在线直接淬火工艺制备热轧超高强钢M1200HS,研究了其显微组织、力学性能及在石英砂与水的混合物中的磨粒磨损性能,并与传统低合金耐磨钢NM400和NM450作对比。结果表明:M1200HS钢的显微组织为马氏体和极少量铁素体,其马氏体板条尺寸较大,大角度晶界占比较小;M1200HS钢的抗拉强度和硬度分别为1 387 MPa和403 HB,均符合GB/T 24186-2009标准,且与NM400钢近乎相当,但低于NM450钢;3种试验钢的磨损机制均为微观切削机制,M1200HS钢与NM400钢的耐磨粒磨损性能相当,但低于NM450钢。A hot rolled ultra-high strength steel M1200 HS was produced by hot rolling and online direct quenching processes. The microstructure, mechanical properties, and abrasive wear behavior in a mixture of quatz sand and water of M1200 HS steel were studied and compared with those of traditional low alloy wear-resisting steels NM400 and NM450. The results show that the microstructure of M1200 HS steel was martensite and very little ferrite, the size of martensite lath was large and the proportion of large angle grain boundary was small. The tensile strength and hardness of M1200 HS steel were 1 387 MPa and 403 HB, respectively, which were conform to GB/T 24186-2009 standard, and almost equal to those of NM400 steel, but lower than those of NM450 steel. The wear mechanism of the three kinds of test steel was micro cutting. The abrasive wear resistance of M1200 HS steel was similar to that of NM400 steel, but lower than that of NM450 steel.

关 键 词：在线直接淬火 超高强钢 显微组织 磨粒磨损性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]