钎焊中高温氧化对硬质合金的影响  

Effect of high temperature oxidation on cemented carbide during brazing

作　　者：徐登强 李惠琪[1] 李敏[1] 王淑峰[1] 迟静[1] 

机构地区：[1]山东科技大学材料科学与工程学院,山东青岛266590

出　　处：《材料热处理学报》2015年第1期75-79,共5页Transactions of Materials and Heat Treatment

基　　金：青岛市科技发展计划项目(12-1-4-6-(4)-jch)

摘　　要：研究了YG-11C硬质合金在900、950、1000℃下加热的氧化行为,并测试了在钎焊过程中受氧化的硬质合金刀头性能。结果表明,硬质合金在900℃以上加热10 min发生氧化,硬质相WC和粘结相Co被氧化成WO3和Co WO4;氧化后的硬质合金发生变形及增重,随温度升高,氧化现象更严重,变形增重更明显;高温钎焊后的硬质合金刀头表面氧化后,微观组织变得疏松多孔,硬度及耐磨性明显降低。The oxidation behavior of YG-11 C cemented carbide heating at 900,950,1000 ℃ was investigated,and the performance of oxidation of carbide bit during the brazing was measured. The results show that oxidation of cemented carbide occurs in 10 min when the temperature is above 900 ℃,the hard phase WC and binder phase Co are oxidized into WO3 and Co WO4. Deformation and mass gain occur when the cemented carbide is oxidized,and the higher the temperature is the more serious the oxidation behavior is,and the more obvious deformation and mass gain is. The microstructure of carbide bit becomes loose and porous after surface oxidation during brazing at high temperature,and the hardness and wear-resistance decrease.

关 键 词：硬质合金 钎焊 氧化 组织 性能 

分 类 号：TG135.5[一般工业技术—材料科学与工程] TG454[金属学及工艺—合金]