钢结硬质合金局域化增强中铬钢基复合材料的磨损性能  

Wear Behavior of Medium Cr Steel Matrix Composite Localized Reinforced by Steel Bonded Carbide

作　　者：侯书增 鲍崇高[2] 韩建东 付鸽 HOU Shuzeng;BAO Chonggao;HAN Jiandong;FU Ge(School of Mechanical Engineering,Sichuan University of Science&Engineering,Zigong 643000,China;State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiao tong University,Xi'an 710049,China)

机构地区：[1]四川理工学院机械工程学院,四川自贡643000 [2]西安交通大学金属材料强度国家重点实验室,陕西西安710049

出　　处：《热加工工艺》2020年第22期80-84,共5页Hot Working Technology

基　　金：四川理工学院人才引进项目(2015RC05);汽车高性能材料及成形技术省高校重点实验室项目(SZJJ2015-092);自贡市重点科技计划项目(2017XC21)。

摘　　要：为了解决严酷工况下的磨损问题,利用磨料磨损试验机对不同WC含量的钢结硬质合金局域化增强中铬钢基复合材料的磨损性能进行了研究,并与基体材料进行了比较。结果表明:复合材料的耐磨性远高于中铬钢的耐磨性,钢结硬质合金增强区域中WC含量分别为70wt%、80wt%和90wt%的3种复合材料的相对耐磨性分别达到中铬钢的1.5倍、2.2倍和3.7倍;复合材料的相对耐磨性随着钢结硬质合金增强区域中WC含量的增加而增大,且增大幅度逐渐增加;在磨损过程中,凸出磨损面的钢结硬质合金增强区域对基体区域的保护作用和基体区域对钢结硬质合金增强区域的支撑作用相互配合使得复合材料具有优异的耐磨性;复合材料的磨损机理是磨料滑动造成的显微切削和磨料滚动造成的多次塑变疲劳断裂。In order to solve the wear problem under severe working conditions, the wear properties of steel bonded carbide localized reinforced steel matrix composites with different WC content were studied by abrasive wear test machine,and compared with that of matrix material. The results show that, the wear resistance of the composites is much higher than that of medium chromium steel. The relative wear resistance of the three composites with WC content of 70%, 80% and 90%in the steel bonded cemented carbide reinforced area is 1.5 times, 2.2 times and 3.7 times of that of the medium chromium steel, respectively. The relative wear resistance of the composites increases with the increase of WC content in the steel bonded cemented carbide reinforced zone, and the increasing range increases gradually. In the process of wear, the composite has excellent wear resistance due to the protective effect of the reinforcing area of the steel bonded carbide on the matrix region and the supporting effect of the matrix region on the strengthening area of the steel bonded carbide. The wear mechanism of composites is micro-cutting caused by abrasive rolling and multiple plastic fatigue fracture caused by abrasive sliding.

关 键 词：局域化增强 磨料磨损 磨损机理 钢结硬质合金 

分 类 号：TB333.11[一般工业技术—材料科学与工程]