亚温淬火对低合金耐磨钢增韧及性能的影响
Effect of intercritical quenching on toughening and properties of low alloy wear-resistant steel
胡昂 1吴润 1李忠波 1吴腾1
作者信息
- 1. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉 430081
- 折叠
摘要
采用亚温淬火对NM500级耐磨钢进行增韧处理.结果表明,试验钢经790 ℃亚温淬火和170 ℃回火后,其组织中含体积分数7.3％的铁素体,冲击吸收能量由完全淬火的40 J提高到58 J,磨损性能最好;完全奥氏体化冷却到Ac3以下再进行亚温淬火,因铁素体分布使冲击吸收能量提升不明显,磨损性能降低.亚温淬火使马氏体中碳含量增加,组织中少量针状铁素体不仅能明显提高韧性,耐磨性也较完全淬火优良.
Abstract
NM500 wear-resistant steel was toughed by intercritical quenching.The results show that after intercritical quenching at 790℃and tempering at 170 ℃,the microstructure of the tested steel contains 7.3％volume fraction of ferrite,and the impact absorbed energy is increased from 40 J after complete quenching to 58 J,with the best wear resistance.Complete austenitization cooling to below Ac3 followed by intercritical quenching reduces wear properties of the steel due to the distribution of ferrite,while impact absorbed energy does not change a lot.Intercritical quenching increases the carbon content of martensite,a small amount of needle-like ferrite in the structure can improve the toughness of the steel,and wear resistance is better than that of the complete quenched.
关键词
亚温淬火/铁素体/NM500级耐磨钢/冲击性能/耐磨性Key words
intercritical quenching/ferrite/NM500 grade wear-resistant steel/impact property/wear resistance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据