高强韧性低合金耐磨钢的开发与研究  

Development and Research of Wear-resistant Steel with High Strength and Toughness

作　　者：曹艺[1] 王昭东[1] 姜在伟 张逖 王超[1] 吴迪[1] 

机构地区：[1]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110004 [2]南京钢铁股份有限公司,江苏南京210035

出　　处：《轧钢》2011年第6期3-7,共5页Steel Rolling

基　　金：国家重点研究发展计划(973)项目(2010CB630800)

摘　　要：针对我国生产的耐磨钢性能不稳定、低温冲击韧性差、板形控制困难等缺点,采用Ti-Cr-B微合金化成分设计,利用3500mm炉卷轧机及辊式淬火机等设备,通过轧后淬火+回火工艺生产了6～60mm厚低成本NM360、NM400低合金耐磨钢板。其板条结构上分布的高密度位错及碳化物硬化了基体,并阻止了显微切削,析出物能细化晶粒并起到了沉淀强化作用。该钢板具有良好的低温冲击韧性,表面及厚度方向硬度分布均匀,10mm以下薄规格板形良好,耐磨性能及焊接性能均满足用户需求。In view of unstable properties, bad low-temperature toughness and difficult shape control of domestic wear-resistant steel, 6-60mm thickness NM360 and NM400 wear-resistant steel with low alloy was produced by using Ti-Cr-B microalloying, 3500mm Steckel mill, roller quenching -1- tempering process. Highly density dislocation and carbides harden matrix and inhibit microcutting. Precipitate particles have the functions of grain refinement and precipitation strengthening. The piate has good low-temperature toughness and uniform hard- ness distribution on surface and thickness direction. The shape of less than lOmm thickness thinner plate is well. The wear-resistance and weldability of the products can meet the customer＇s requirement.

关 键 词：耐磨钢 显微组织 力学性能 耐磨性能 焊接性能 

分 类 号：TG142.72[一般工业技术—材料科学与工程]