高载荷作用下H13钢磨损行为的研究  

Research on Wear Behavior of H13 Steel under High Loads

作　　者：赵志刚[1] 王树奇[1] 张秋阳[1] 廖远禄 ZHAO Zhigang;WANG Shuqi;ZHANG Qiuyang;LIAO Yuanlu(School of Material Science and Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《热加工工艺》2020年第22期63-67,共5页Hot Working Technology

摘　　要：利用销盘式高温摩擦磨损试验机,研究了H13钢在25、200、400℃,载荷分别为150、200、250 N下的干滑动磨损行为。试验结果显示:在相同环境温度下,磨损率均随载荷的升高而增大。150N时,25、200℃时的磨损率基本相同。25℃,150、200 N时,磨损机制主要以磨粒磨损和粘着磨损为主;250 N时出现氧化层,磨损机制为塑性挤出、粘着和氧化物层的剥落磨损。200℃时,磨损率增长的幅度较25℃有所增加。150 N时,磨损机制主要为氧化轻微磨损,同时伴随着磨粒和粘着磨损,200、250 N的磨损机制主要为塑性挤出和氧化物层的剥落磨损。400℃时,载荷150 N时的磨损率较低,磨损表面有氧化层生成且出现较深的犁沟,磨损机制为氧化磨损和氧化物层的剥落磨损;载荷超过150 N时,磨损率迅速升高,磨损机制发生转变,向严重磨损转变,主要为塑性挤出磨损和氧化物层的剥落磨损。The dry sliding wear characteristics for H13 steel were carried out with high-temperature pin-on-disc wear tester at 25 ℃, 200 ℃ and 400 ℃, under loads of 150 N, 200 N and 250 N, respectively. The results indicate that the wear rates increase with the increase of loads at 25 ℃, 200 ℃ and 400 ℃. The wear rate at 25 ℃is identical to that at 200 ℃ under 150 N. The wear mechanisms under 150 N and 200 N at 25℃ are abrasive and adhesive wear;the oxide layer forms under 250 N and the wear mechanisms are plastic extrusive wear, adhesive wear and the delamination wear of the oxide layer. At 200 ℃, the increased trend of wear rate is higher than that at 25 ℃. The main mechanism under 150 N is oxidative mill wear, accompanied with abrasive and adhesive wear. The wear mechanisms are the plastic extrusive wear and the delamination wear of the oxide layer under 200 N and 250 N. At 400 ℃, the wear rate is lower under 150 N. The oxide layer is developed and deep furrow appearing on the worn surface under 150 N. The wear mechanisms are of mixture of the oxidative wear and the delamination wear of the oxide layer. The wear rate drastically increases while in exceeding 150 N. The wear mechanisms are transformed and are converted into the severe wear. The predominant mechanisms are plastic extrusive wear and the delamination wear of the oxide layer.

关 键 词：H13钢 磨损行为 氧化物 

分 类 号：TG113.2[金属学及工艺—物理冶金]