微波加热快速烧结WC-Ni_(3)Al-B硬质合金的组织与性能  

Mechanical Properties and Microstructure of WC-Ni_(3)Al-B Cemented Carbides by Quickly Microwave Sintering

作　　者：韩旭 唐思文 卢继[1] 刘骞 刘鹏飛[1] 杨植富 HAN Xu;TANG Siwen;LU Ji;LIU Qian;LIU Pengfei;YANG Zhifu(Hunan Provincial Key Laboratory of Mechanical Equipment Health Maintenance,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Provincial Key Defense Laboratory of High Temperature Wear Materials and Preparation Technology,Hunan University of Science and Technology,Xiangtan 411201,China;Engineering Research Center of Ministry of Education for Development Technology and Equipment of Deep Sea and Deep Ground Mineral Resources,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学机械设备健康维护湖南省重点实验室,湖南湘潭411201 [2]湖南科技大学高温耐磨材料及制备技术湖南省国防科技重点实验室,湖南湘潭411201 [3]湖南科技大学深海深地矿产资源开发技术与装备教育部工程研究中心,湖南湘潭411201

出　　处：《材料科学与工程学报》2023年第3期411-417,共7页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(51305134,52275424);湖南省自然科学基金资助项目(2020JJ4308);湖南省教育厅科学研究资助项目(18B230,22A0346)。

摘　　要：本研究采用微波烧结技术制备了不同Ni_(3)_Al含量的硼掺杂WC-Ni_(3)_Al硬质合金材料,研究了烧结工艺和Ni_(3)_Al含量对力学性能和微观组织的影响。研究表明,使用微波烧结可以在较短的时间内制备出性能优异的WC-Ni_(3)_Al-B合金。随烧结温度升高,合金的相对密度和弯曲强度先升后降。Ni_(3)_Al含量的增加可以降低合金的烧结温度,随Ni_(3)_Al含量增加其弯曲强度和断裂韧性升高,硬度下降。当Ni_(3)_Al含量为10%、在1450℃、烧结15min时,合金具有较高的综合力学性能。Microwave sintering technology was used to prepare boron-doped WC-Ni_(3)_Al cemented carbides with different Ni_(3)_Al contents,and the effects of sintering parameters and Ni_(3)_Al content on the performance characteristics were studied.Because the activation mechanism of microwave sintering promotes the sintering process,WC-Ni_(3)_Al-B cemented carbide can be prepared in a short time by microwave sintering.With the increase of sintering temperature,the relative density and flexural strength of WC-Ni_(3)_Al-B cemented carbide tend to increase first and then decrease.The effect of increasing Ni_(3)_Al content on WC-Ni_(3)_Al cemented carbide is reflected in reducing its sintering temperature and hardness,while gradually increasing strength and fracture toughness.When the Ni_(3)_Al content is 10%,the sintering temperature is 1450℃,and the holding time is 15 minutes,the WC-Ni_(3)_Al-B cemented carbide has the best comprehensive mechanical properties.

关 键 词：WC-Ni3Al硬质合金 微波烧结 力学性能 烧结温度 烧结时间 

分 类 号：TG135.5[一般工业技术—材料科学与工程]