钴含量及晶粒度对硬质合金冲击疲劳性能的影响  

Effect of Cobalt Content and Grain Size on the Impact Fatigue Property of Cemented Carbide

作　　者：欧朝霞[1] 

机构地区：[1]株洲硬质合金集团有限公司,湖南株洲412000

出　　处：《硬质合金》2008年第1期37-41,共5页Cemented Carbides

摘　　要：采用冲击弯曲试验研究了硬质合金的冲击疲劳性能。结果表明,当晶粒度一定时,硬质合金的冲击疲劳性能随着钴含量的增加而提高;当钴含量一定,WC晶粒度为1.2～3.2μm时,WC-Co硬质合金的冲击疲劳性能先是随着WC晶粒度的增粗而提高,当晶粒度增加到一定程度时,冲击疲劳性能出现下降。超细晶粒硬质合金的冲击疲劳性能明显高于一般WC-Co硬质合金。The impact fatigue property of cemented carbide was studied by impact bending test in this paper. The result indicates that the impact fatigue property of cemented carbide increases as the cobalt content increasing at a certain WC grain size; under a certain cobalt content, it increases to a peak value and then decreases against the increase of WC grain size from 1.2 μm to 41μm. It can also be found that the impact fatigue property of ultrafine cemented carbide shows much higher than common cemented carbide

关 键 词：冲击弯曲试验 钴含量 晶粒度 冲击疲劳性能 

分 类 号：TG135.5[一般工业技术—材料科学与工程]