低成本高韧性NM500钢板的研究及开发
Research and development of low cost and high toughness NM500 steel plate
高擎 1王麒 2张青学 1钱亚军 1邓想涛 2王昭东2
作者信息
- 1. 湖南华菱湘潭钢铁有限公司,湖南湘潭 411101
- 2. 东北大学轧制技术及自动化国家重点实验室,辽宁沈阳 110819
- 折叠
摘要
通过在普通NM500合金基础上进行合金减量化设计,结合高纯净度冶炼以及合理的热处理制度,成功开发出具有易焊接、良好综合力学性能和耐磨性能的低成本NM500钢板.低成本NM500钢板全厚度组织为板条马氏体,大角度晶界占比为71.6％,有效晶粒尺寸为1.94μm,硬度HV为500～520,屈服强度为1222 MPa,抗拉强度为1583MPa,伸长率为9.6％,-40℃冲击功为58.8J.其耐磨性和普通NM500钢板的耐磨性相同,且形貌均由犁沟和少量剥落坑组成.对于能完全淬透的组织,合金减量化对组织和性能影响较小.
Abstract
Through the alloy reduction design on the basis of ordinary NM500 alloy,combined with high purity smelting and reasonable heat treatment,a low cost NM500 steel plate with easy welding,good comprehensive mechanical properties and wear resistance was successfully developed.The full thickness microstructure of low cost NM500 steel plate was lath martensite with the effective grain size of 1.94 μm,and the proportion of high angle grain boundary was 71.6％.The HV hardness of low cost NM500 steel plate was between 500-520 with the yield strength,the tensile strength and the elongation of 1 222 MPa,1 583 MPa and 9.6％,respectively.The impact energy of low cost NM500 steel plate at-40 ℃ was 58.8 J.Its wear resistance was the same as that of ordinary NM500 steel plate,and the morphology was composed of grooves and a small amount of spalling pits.For the structure that can be completely quenched,the alloy reduction has little effect on the structure and properties.
关键词
NM500/低成本/高韧性/力学性能/耐磨性Key words
NM500/low cost/high toughness/mechanical property/wear resistance引用本文复制引用
基金项目
国家重点研发计划(2017YFB0305100)
出版年
2024
NETL
NSTL
万方数据