摘要
采用销-盘式高温摩擦磨损试验机,对H13钢常规淬火与回火处理试样进行高温磨损实验,研究H13钢在400~600℃、50~150 N、50和100 r/min条件下的摩擦磨损性能。采用XRD、SEM、EDS、显微硬度计对H13钢磨面、磨损截面的结构、形貌、成分及硬度进行分析,并探讨其磨损机制。结果表明:在不同实验条件下H13钢的磨损率均随温度升高先降低后升高,其中500℃的磨损率最低,在低转速下600℃的磨损率低于400℃,而在高转速和较高载荷下则相反;在低转速下的磨损率随载荷的增加先升高后降低,而在高转速下的磨损率单调升高,且在600℃、150 N条件下发生严重磨损,而在其他滑动条件下均为轻微磨损;H13钢在高温下磨面会形成氧化物,但在高转速不利于磨面上氧化物的生成,因而生成等量的氧化物需要更高的温度;中低温下氧化物的生成起到减磨作用,磨损率下降,而在高温下H13钢基体发生回复、再结晶,力学性能较差,在高载高速下导致基体发生严重塑性挤出,轻微氧化磨损转变为严重氧化磨损。
A pin-disk high-temperature friction and abrasion tester was used to perform high-temperature abrasion tests on H13 steel conventionally quenched and tempered treated samples.The friction and wear properties of H13 steel were studied under the temperature of 400℃to 600℃,the load of 50 N to 150 N and the speed of 50 r/min and 100 r/min.XRD,SEM,EDS,micro hardness tester were used to analyze the structure,morphology,composition and hardness of the wear surface and wear section of H13 steel,and the wear mechanism was discussed.The results show that under different experimental conditions,the wear rate of H13 steel is first decreased and then increased with the increase of temperature.The wear rate at 500℃is the lowest,and the wear rate at 600℃is lower than 400℃at low speed,but it is opposite at high speed and high load.The wear rate of H13 steel is decreased first and then increased with the increasing of the load at low speed,and is increased monotonously at high speed.Severe wear occurs at the sliding conditions of 600℃,150 N and 100 r/min,while slight wear occurs at other sliding conditions.The oxides can be formed on the grinding surface of H13 steel at high temperature,while the high speed is not conducive to the formation of oxides on the grinding surface at high temperature,so that the same amount of oxides generated at high speed needs a higher temperature.The wear rate is decreased due to the effect of grinding at low and middle temperature,but at high temperatures,the matrix of H13 steel is reverted and recrystallized,resulting in poor mechanical properties,so the severe plastic extrusion of the matrix occurs,and the slight oxidation wear changes into severe oxidation wear.
作者
陈磊
姜伟
崔向红
王树奇
CHEN Lei;JIANG Wei;CUI Xianghong;WANG Shuqi(School of Materials Science and Engineering,Jiangsu University,Zhenjiang Jiangsu 212013,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2021年第4期122-129,共8页
Lubrication Engineering
关键词
H13钢
高温磨损
磨损行为
磨损机制
H13 steel
high temperature wear
wear behavior
wear mechanism
