摘要
采用砂型铸造技术制备出Si含量为2.00wt%的高硼高速钢,研究了该钢800℃高温抗氧化性能和抗热震性能,并与M2高速钢进行对比。结果表明:含硅高硼高速钢在800℃下氧化100 h后的氧化增重比M2高速钢低2个数量级;同时在800℃保温30 min水淬下循环50次的抗热震损伤性能是M2高速钢的5~8倍。含硅高硼高速钢高抗氧化性的原因是氧化膜致密连续,且氧化膜主要由Fe-Cr尖晶石(FeCr2O4层)及内氧化层SiO2构成,内氧化层与M2B硼化物在界面处的微凸体形成界面钉子效应,提高了膜/基结合强度;而该钢高的抗热震性能来源于其优异的抗裂纹萌生和扩展能力。
The high boron high speed steel(HBHSS)containing 2.00wt% Si was prepared by sand-mould cast method.The high-temperature oxidation resistance and thermal shock properties at 800℃ of the steel were studied compared with that of M2 high speed steel.The results show that the oxidation gain of HBHSS at 800℃ for 100 h is 2 orders of magnitudes lower than that of M2 HSS.Meantime,the 50-time cycle thermal shock resistance of HBHSS held at 800℃ for 30 min then quenched in water is 5-8 times higher than that of M2 HSS.The reason for the high oxidation resistance of HBHSS is that continuous and compact oxidation film.The oxidation film is composed of FeCr2O4 layer and SiO2 internal oxidation layer.At the same time,the interfacial nail effect appears because of micro convex body of internal oxidation layer of the interface and M2B boride,which can improve the bonding strength of film and matrix.The good thermal shock resistance of the steel is attributed to the excellent crack initiation resistance and propagation resistance.
作者
吕萍
高义民
马胜强
陈翰韬
马胜超
商瑾
王天元
王嘉琪
LYU Ping;GAO Yimin;MA Shengqiang;CHEN Hantao;MA Shengchao;SHANG Jin;WANG Tianyuan;WANG Jiaqi(State Key Laboratory for Mechanical Behavior of Metal Materials,School of Materials Science and Engineering,Xi'an Jiaotong University,Xi'an 710049,China;School of Environment and Chemical Engineering,Xi'an Polytechnic University,Xi'an 710048,China;AVIC Shaanxi AERO Electric Co.,Ltd.,Xingping 710065,China)
出处
《热加工工艺》
北大核心
2020年第6期40-43,共4页
Hot Working Technology
基金
国家自然科学基金资助项目(51771143)
金属材料磨损控制与成型技术国家地方联合工程研究中心重点基金资助项目(HKDNM201801)。
关键词
高温氧化
热震性能
高硼高速钢
内氧化
界面效应
high-temperature oxidation
thermal shock resistance
high boron high speed steel
internal oxidation
interface effect
作者简介
吕萍(1987-),女,陕西宝鸡人,硕士,主要研究方向:有机化合物合成及钢铁材料高性能化,E-mail:727309910@qq.com;通讯作者:马胜强(1982-),男,陕西汉中人,副教授,博士,主要研究方向为钢铁材料高性能化及金属材料腐蚀与防护,E-mail:sqma@mail.xjtu.edu.cn。
