摘要
通过调整WC颗粒尺寸(50μm和100μm)和质量分数(25%、35%和45%),采用新型的复合电冶熔铸工艺制备了4种WC颗粒增强钢基复合材料,以及作为对比的5Cr Ni Mo钢,对经过不同热处理的复合材料进行干滑动摩擦磨损试验,研究了各试样的摩擦因数和磨损量,并对磨损形貌进行分析。结果表明:随着WC含量或颗粒度在一定范围内增大,摩擦因数呈提高的趋势。在1000℃淬火+180℃回火,粗颗粒的WC含量为45%时,复合材料表现出最佳的耐磨性,是5Cr Ni Mo钢的21.96倍,是粗颗粒含量25%和35%时的10.65倍和8.91倍,是细颗粒含量45%时的5.35倍。PRMMC在干滑动摩擦磨损条件下的磨损机制为磨粒磨损和氧化磨损。
By adjusting the size（ 50 μm and 100 μm） and content（ 25wt%,35wt% and 45wt%） of WC particulates,four kinds of WC particle reinforced steel matrix composites,as well as the 5CrNiMo steel were prepared by the composite electroslag melting and casting technology. The dry sliding friction and wear test of composite materials subjected to different heat treatment was carried out. The friction coefficient and wear loss of each sample were measured,and the wear morphology was analyzed. The results show that the friction coefficient increases with the increase of WC content or particle size within a certain range. When quenched at 1000 ℃ and then tempered at 180 ℃,and he content of crude WC particulates is 45wt%,the composite material exhibits the best abrasion resistance,which is higher than that of5 CrNiMo steel by 21. 96 times,by 10. 65 times and 8. 91 times higher than that of the coarse particle content of 25% and 35%,and by 5. 35 times higher than that of the composite with 45% fine WC particle. The wear mechanism of the particle reinforced metal matrix composites under dry sliding friction and wear conditions is abrasive wear and oxidation wear.
出处
《金属热处理》
CAS
CSCD
北大核心
2017年第8期11-15,共5页
Heat Treatment of Metals
基金
江苏省高校自然科学研究面上项目(15KJB430030)
徐州市科技计划项目(KC16SG281)
关键词
WC颗粒增强钢基复合材料(PRMMC)
复合电冶熔铸
热处理
摩擦磨损
WC particle reinforced steel matrix composites（PRMMC）
composite electroslag melting and casting
heat treatment
friction and wear
