TiC粒子增强低合金耐磨钢NM450SP三体磨损性能研究  

Three-Body Abrasive Wear Study for TiC-reinforced Low Alloy Wear Resistant Steel NM450SP

作　　者：郑健[1] 杨曦 王麒 邓想涛[2] 罗登[1] 王昭东[2] ZHENG Jian;YANG Xi;WANG Lin;DENG Xiangtao;LUO Deng;WANG Zhaodong(Hunan Valin Xiangtan Iron and Steel Co.,Ltd.,Xiangtan 411100,China;State Key Laboratory of Rolling Technology and Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]湖南华菱湘潭钢铁有限公司,湖南湘潭411100 [2]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《金属材料与冶金工程》2020年第5期27-31,35,共6页Metal Materials and Metallurgy Engineering

摘　　要：本文对湘钢生产的Ti C粒子增强型低合金马氏体耐磨钢(NM450SP)的组织、硬度、耐磨性及磨损机制进行分析,并与硬度相近的传统马氏体耐磨钢(NM450D)进行了对比。NM450SP钢板以板条马氏体作为基体,在基体上分布着大量Ti C粒子,硬度为444 HV;NM450SP钢板粒子从表面到心部粒子尺寸逐渐增加,表面、厚度1/4位置、厚度1/2位置粒子尺寸分别为2.64、 3.58、 3.64μm。NM450D钢板组织为板条马氏体,硬度为463 HV。三体磨料磨损实验结果表明NM450SP钢板耐磨性为NM450D钢板的1.43倍。在基体中加入Ti C粒子可以阻碍磨料压入基体,使犁沟和微切削深度下降;同时可以阻碍磨料在基体上滑动,使犁沟和微切削长度下降,从而提高耐磨性。In this dissertation,the microstructure,hardness,wear resistance and wear mechanism of the TiC-reinforced low alloy martensitic wear-resistant steel(NM450SP)produced in XISC were analyzed,and compared with the traditional martensitic wear resistant steel(NM450D)with similar hardness.The microstructure of NM450SP steel plate was lath martensite with a large number of TiC particles and the hardness of NM450SP was 444 HV.The particle size of NM450SP steel gradually increases from surface to the center of plate.The particle size of surface,1/4-thickness and 1/2-thickness of plate was 2.64,3.58 and 3.64μm,respectively.The microstructure of NM450D steel plate was lath martensite with the hardness of 463 HV.The abrasion resistance of NM450SP steel plate was 1.43 times that of NM450D steel plate.Adding TiC particles into the matrix prevented the abrasive from embedding in the matrix and made the furrow and m icro-cutting depth decrease.At the same tim e,prevented the abrasive tip from sliding on the matrix and reduced the length of the furrow and micro-cutting,so as to improve the wear resistance.

关 键 词：TiC粒子 低合金耐磨钢 三体磨损 磨损机制 

分 类 号：TG142.4[一般工业技术—材料科学与工程]