(Cr_(0.87),V_(0.13))_(2)(C,N)含量对WC-10Co硬质合金微观组织及力学性能的影响  

Effect of(Cr_(0.87),V_(0.13))_(2)(C,N)Content on Microstructure and Mechanical Properties of WC-10Co Cemented Carbides

作　　者：李祥坤 王璐 叶金文[1] Li Xiangkun;Wang Lu;Ye Jinwen(College of Materials Science and Engineering,Sichuan University,Chengdu 610065,China;不详)

机构地区：[1]四川大学材料科学与工程学院

出　　处：《工具技术》2024年第6期50-55,共6页Tool Engineering

基　　金：攀西试验区第五批重大科技攻关项目(2022PXZB-04);四川大学自贡市校地科技合作研发项目(2021CDZG-1)。

摘　　要：通过添加一种新型抑制剂(Cr_(0.87),V_(0.13))_(2)(C,N)制备出室温和高温下均性能优异的WC-10Co硬质合金,并研究(Cr_(0.87),V_(0.13))_(2)(C,N)含量对WC-10Co硬质合金微观组织、室温力学性能和高温硬度的影响。结果表明,添加(Cr_(0.87),V_(0.13))_(2)(C,N)具有良好的细化WC晶粒的效果,随着(Cr_(0.87),V_(0.13))_(2)(C,N)含量增加,WC晶粒不断细化,硬度逐渐增加,断裂韧性降低,抗弯强度(TRS)先升高后降低,当(Cr_(0.87),V_(0.13))_(2)(C,N)的添加量为0.6wt.%时,抗弯强度最高为3840.5MPa。抑制剂(Cr_(0.87),V_(0.13))_(2)(C,N)的加入对高温硬度具有积极影响,随着(Cr_(0.87),V_(0.13))_(2)(C,N)含量增加,高温硬度逐渐增加;当(Cr_(0.87),V_(0.13))_(2)(C,N)含量不变时,随着温度升高,硬度逐渐降低。Aiming at the problems that carbides encountered as metal cutting tools,a new kind of near-nano WC-Co cemented carbides with excellent room and elevated temperature performance are prepared by adding a new inhibitor(Cr_(0.87),V_(0.13))_(2)(C,N),and the effects of(Cr_(0.87),V_(0.13))_(2)(C,N)content on the microstructure,room-temperature mechanical properties and high-temperature hardness of WC-10Co cemented carbides are investigated.The results show that(Cr_(0.87),V_(0.13))_(2)(C,N)has an excellent effect on refining the WC grains.With the increase of(Cr_(0.87),V_(0.13))_(2)(C,N)content,the WC grains are refined,the hardness is increased,the fracture toughness is decreased,and transverse rupture strength(TRS)is firstly increased and then decreased,when the addition of(Cr_(0.87),V_(0.13))_(2)(C,N)is 0.6wt.%,the TRS is the best,which is 3840.5MPa.The addition of the inhibitor(Cr_(0.87),V_(0.13))_(2)(C,N)also has a positive effect on the high-temperature hardness.With the increase of(Cr_(0.87),V_(0.13))_(2)(C,N)content,the high-temperature hardness is increased.When(Cr_(0.87),V_(0.13))_(2)(C,N)content is constant,the increase in temperature leads to a decrease in high-temperature hardness.

关 键 词：(Cr_(0.87) V_(0.13))_(2)(C N) 微观组织 室温力学性能 高温硬度 

分 类 号：TG135.5[一般工业技术—材料科学与工程]