摘要
借助淬透性模拟计算软件,研究了支重轮用钢40Mn2钢淬透性的影响因素.结果发现:Cr含量在0.05％～0.15％时,随着Cr含量的升高,40Mn2钢J15mm端淬值呈增长趋势,但当Cr含量超过0.10％时,J15mm端淬值的增长趋于平缓;硼含量在0.000 1％～0.000 6％时,随着硼含量的升高,J15mm端淬值呈增长趋势;Si含量在0.19％～0.28％范围内时,Si含量的变化对40Mn2钢J15mm端淬值的基本没有影响.通过控制熔炼过程中硅锰合金和锰铁中硼含量≤70 ppm;严禁使用含硼废钢;钢包砖不添加硼酸,且钢包冶炼含硼钢后需周转2次以后才允许冶炼40Mn2钢;RH增加吹N工艺,控制钢中N含量在60～90 ppm;钢中目标Cr含量由0.10％降低到0.07％;并优化40Mn2钢成分等措施,彻底解决了40Mn2钢端淬超标问题.
Abstract
With the help of hardenability simulation software,the influencing factors of hardenability of 40Mn2 steel for rollers were studied.The results showed that when the Cr content was 0.05％～0.15％,with the increase of Cr content,the J 15mm end quenching value of 40Mn2 steel showed an increasing trend,but when the Cr content exceeded 0.10％,the growth of J15mm end quenching value tended to be flat,when the boron content was 0.000 1％～0.000 6％,with the increase of boron content,the J15 mm end quenching value showed an increasing trend,and the Si content was 0.19％～0.28％In the range,the change of Si content has no effect on the end quenching value of 40Mn2 steel J15 mm.By controlling the boron content of silicon-manganese alloy and ferromanganese in the smelting process ≤70 ppm,it is strictly forbidden to use boron-containing scrap steel,no boric acid is added to the ladle bricks,and the 40Mn2 steel is allowed to be smelted only after the ladle smelts boron-containing steel after 2 turnovers,RH increases the blowing N process,controls the N content in the steel to 60～90 ppm,reduces the target Cr content in the steel from 0.10％to 0.07％,and optimizes the composition of 40Mn2 steel,etc.,and completely solves the problem of excessive end quenching of 40Mn2 steel.
基金项目
国家自然科学基金联合基金项目(NSFC)(U20A20272)
河北省军民科技协同创新专项(22351001D)
河北省高等学校科学技术研究项目资助(CXY2023004)
维普
万方数据