改性方法对WC基硬质合金刀具材料组织及性能的影响  

Effect of Modification Methods on Microstructure and Properties of WC-Based Cemented Carbide Tool Materials

作　　者：居志兰[1,2] 朱永伟[1] 张华[2] 花国然[2] 

机构地区：[1]南京航空航天大学机电学院,南京210016 [2]南通大学机械工程学院,南通226019

出　　处：《机械工程材料》2012年第2期61-63,共3页Materials For Mechanical Engineering

基　　金：南通市应用研究项目(K2009021);江苏省高校自然科学基金资助项目(10KJB460006)

摘　　要：采用真空烧结法制备了WC基硬质合金刀具材料,研究了不同改性方法对其组织及性能的影响。结果表明:粘结剂镍和钛代替镍提高了硬质合金刀具材料的硬度和抗弯强度,大大降低了后刀面的磨损;添加纳米SiCp使硬质合金刀具材料的组织更加均匀,相对密度、硬度、抗压强度及耐磨性进一步提高;粘结剂钴比镍对WC表面具有更好的润湿性,可进一步提高硬质合金刀具材料的硬度;WC表面化学镀包覆粘结金属钴进一步提高了硬质合金刀具材料的整体性能。The effects of different methods mechanism on microstructure and properties of WC-based cemented carbide tool materials prepared by vacuum sintering were studied.The results show that Ni-Ti replacing Ni as binder could improve the hardness and bending strength of the tool materials,the wear of flank surface reduced greatly.Adding nano-SiCp made the microstructure of the cemented carbide tool materials more homogeneous,and the density,hardness,compression strength,and wear-resistance be further improved.The hardness of the tool materials was enhanced because Co had better wettability with WC surface than Ni as binder,and electoless plating cladding Co on WC surface increased the overall performance of the tool materials.

关 键 词：纳米改性 硬质合金刀具 化学镀 耐磨性 

分 类 号：TH117.3[机械工程—机械设计及理论]