摘要
以传统Mn13Mo高锰钢为对比材料,采用MLD-10B冲击磨料磨损试验机,对经不同条件热处理的轻质Fe-26Mn-7.5Al-1.0C耐磨钢的耐磨性及磨损机制进行研究。结果表明:经过1100℃保温2 h固溶处理的Fe-26Mn-7.5Al-1.0C钢在1 J冲击载荷下的耐磨性是Mn13Mo钢的1.11倍;经500℃保温5 h时效处理后,由于大量纳米级κ-碳化物的析出,Fe-26Mn-7.5Al-1.0C钢的硬度、强度与耐磨性提高,在4 J冲击载荷下其耐磨性是Mn13Mo钢的1.30倍;Mn13Mo钢的磨损表面主要以磨粒切削形成的较长犁沟、疲劳磨损产生的剥落坑与微裂纹为主,Fe-26Mn-7.5Al-1.0C钢的磨损表面主要以浅且长的犁沟、分层坑与剥落坑为主;Mn13Mo钢的磨损亚表面形成了大量滑移带,在4 J冲击载荷下晶粒细化,Fe-26Mn-7.5Al-1.0C钢时效处理后的磨损亚表面有较高密度的位错滑移线,未发现有机械孪晶存在。
Wear resistance and wear mechanism of light-weight Fe-26Mn-7.5Al-1.0C wear resistant steel under different heat treatment conditions were studied by using MLD-10B impact abrasive wear testing tester and using Mn13Mo traditional high manganese steel as the contrast material.The results showed that(a)the wear resistance of Fe-26Mn-7.5Al-1.0C steel after solution treatment at 1100℃for 2 h was 1.11 times that of Mn13Mo steel under impact load of 1 J;(b)after aging treatment at 500℃for 5 h,the hardness,strength and wear resistance of Fe-26Mn-7.5Al-1.0C steel were improved due to the precipitation of a large number of nanoscaleκ-carbides,and its wear resistance was 1.30 times that of Mn13Mo steel under impact load of 4 J;(c)the worn surface of Mn13Mo steel was mainly composed of long furrows formed by abrasive cutting,spalling pits and microcracks caused by fatigue wear,and the worn surface of Fe-26Mn-7.5Al-1.0C steel was mainly composed of shallow and long furrows,delamination pits and spalling pits;(d)a large number of slip bands were formed on the worn subsurface of Mn13Mo steel,and the grains were refined under impact load of 4 J,a high density dislocation and slip lines were appeared on the worn subsurface of Fe-26Mn-7.5Al-1.0C steel after aging treatment,and no mechanical twins were found.
作者
梁力文
王青峰
毛忆瑄
程奔
刘日平
孙建昌
陈民涛
LIANG Liwen;WANG Qingfeng;MAO Yixuan;CHENG Ben;LIU Riping;SUN Jianchang;CHEN Mintao(State Key Laboratory of Metastable Materials Preparation Technology and Science,Yanshan University,Qinhuangdao Hebei 066004,China;Technical Center of Taiyuan Heavy Industries Co.,Ltd.,Taiyuan Shanxi 030000,China)
出处
《上海金属》
CAS
2023年第6期32-41,共10页
Shanghai Metals
基金
(005)横向科研/(6010777)太原重工-新型高性能轻质耐磨钢材料技术攻关。
关键词
轻质耐磨钢
固溶时效
冲击磨损
κ-碳化物
位错
light-weight wear resistant steel
solution and aging
impact wear
κ-carbide
dislocation
