摘要
采用冲击磨料磨损试验机、扫描电镜等仪器设备,通过模拟高锰钢零件的实际工况条件,研究不同冲击功条件下材料的磨损规律以及磨损机理.研究结果表明:将高锰钢加热到650℃保温2h,再加热到1 080℃保温2h,然后淬火处理,其晶粒明显细化;高锰钢的临界冲击功为2J/mm2,高锰钢在超过临界冲击功的条件下使用时才能充分发挥其加工硬化作用;高锰钢冲击磨损过程中主要存在切削磨损和凿削磨损两个磨损机制;冲击磨损试验后高锰钢晶粒内出现了大量的滑移带,滑移带密度随着冲击功的增加而增大,在2J/mm2时,甚至出现了交滑移现象.
By using the impact abrasive wear testing machine to simulate the actual working conditions of high manganese steel parts,the wear mechanism of high manganese steel under different impact loads was investigated with scanning electron microscopy and other equipment.The result indicates the grain of the high manganese steel is smaller after the heat treatment process,which firstly heats the high manganese steel to 550 ℃ for 1.5 hours,secondly heats it to 650 ℃ for 2 hours,and then heats it to 1 080 ℃ for 2 hours,and quenches it at last.The relate impact load of 2J/mm2 is the critical impact load of high manganese steel.High manganese steel fully plays its work hardening effect when the relate impact load is above the critical impact load.There are two wear mechanisms：cutting mechanism and pit mechanism.After impact abrasive wear test,there are a large number of slip bands in high manganese steel,and the slip bands＇ density increases when therelate impact load increases.When the relate impact load is 2 J/mm2,the cross slip is found in the grains.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第12期6-10,共5页
Journal of Hunan University:Natural Sciences
关键词
高锰钢
磨料磨损
临界冲击功
磨损机制
Hadfield steel
abrasive wear
critical impact load
wear mechanism
