(Cr0.87,V0.13)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(Cr0.87,V0.13)2(C,N)Content on Microstructure and Mechanical Properties of WC-10Co Cemented Carbides
李祥坤 1王璐 1叶金文1
作者信息
摘要
通过添加一种新型抑制剂(Cr0.87,V0.13)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(Cr0.87,V0.13)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(Cr0.87,V0.13)2(C,N)具有良好的细化WC晶粒的效果,随着(Cr0.87,V0.13)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(Cr0.87,V0.13)2(C,N)的添加量为 0.6wt.%时,抗弯强度最高为 3840.5MPa.抑制剂(Cr0.87,V0.13)2(C,N)的加入对高温硬度具有积极影响,随着(Cr0.87,V0.13)2(C,N)含量增加,高温硬度逐渐增加;当(Cr0.87,V0.13)2(C,N)含量不变时,随着温度升高,硬度逐渐降低.
Abstract
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(Cr0.87,V0.13)2(C,N),and the effects of(Cr0.87,V0.13)2(C,N)content on the microstructure,room-temperature mechani-cal properties and high-temperature hardness of WC-10Co cemented carbides are investigated.The results show that(Cr0.87,V0.13)2(C,N)has an excellent effect on refining the WC grains.With the increase of(Cr0.87,V0.13)2(C,N)con-tent,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(Cr0.87,V0.13)2(C,N)is 0.6wt.%,the TRS is the best,which is3840.5MPa.The addition of the inhibitor(Cr0.87,V0.13)2(C,N)also has a positive effect on the high-temperature hardness.With the increase of(Cr0.87,V0.13)2(C,N)content,the high-temperature hardness is increased.When(Cr0.87,V0.13)2(C,N)content is constant,the increase in temperature leads to a decrease in high-temperature hardness.
关键词
(Cr0.87,V0.13)2(C,N)/微观组织/室温力学性能/高温硬度Key words
(Cr0.87,V0.13)2(C,N)/microstructure/mechanical property/high-temperature hardness引用本文复制引用
基金项目
攀西试验区重大科技攻关计划(第五批)(2022PXZB-04)
四川大学自贡市校地科技合作研发项目(2021CDZG-1)
出版年
2024
NETL
NSTL
万方数据