烧结温度对CuCoCrFeNi基金刚石工具性能的影响  

Effect of Sintering Temperature on the Performance of CuCoCrFeNi Based Diamond Tools

作　　者：汪克敏 尹育航[1,2] 肖国庆 周浩钧[2] 赵轩 冯洋 WANG Kemin;YIN Yuhang;XIAO Guoqing;ZHOU Haojun;ZHAO Xuan;FENG Yang(College of Materials Science and Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Monte-Bianco Diamond Applications Co.,Ltd.,Foshan 528000,China)

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055 [2]广东奔朗新材料股份有限公司,广东佛山528000

出　　处：《超硬材料工程》2025年第2期14-21,共8页Superhard Material Engineering

摘　　要：文章通过机械合金化制备了CuCoCrFeNi高熵合金粉末,采用热压烧结法制备了纯胎体和CuCoCrFeNi基金刚石复合体(金刚石含量3 wt.%),探究不同烧结温度对胎体和复合体力学性能和微观组织的影响。结果表明:随着烧结温度的升高,CuCoCrFeNi基体对金刚石的把持能力增强,胎体组织更加致密均匀。胎体和复合体的相对密度随烧结温度的升高而提高,在950℃时达到最大值,分别是98.2%和97.8%;胎体的硬度和弯曲强度随烧结温度的升高呈现出先增大后降低的趋势,在900℃时达到最大值,最大值分别是107.8 HRB、1224.5 MPa;复合体的弯曲强度、磨耗比和出刃高度在900℃时取得最大值,分别是1030.9 MPa、225和183μm。In this paper,CuCoCrFeNi high-entropy alloy powder was prepared by mechanical alloying,and the pure matrix and CuCoCrFeNi based diamond composite(diamond content 3 wt.%)were prepared by hot pressing sintering method.The effects of different sintering temperatures on the mechanical properties and microstructure of the matrix and sintered sample containing diamond were investigated.The results show that as the increase of sintering temperature,the holding capacity of CuCoCrFeNi matrix on diamond was enhanced,and the microstructure of matrix was more compact and uniform.The relative density of matrix and diamond-containing sintered sample increased with the increase of sintering temperature and reached the maximum value at 950℃,which were 98.2%and 97.8%,respectively.The hardness and bending strength of the matrix exhibit a trend of initially increasing and then decreasing with the increase of sintering temperature,reaching their maximum values at 900℃,which were 107.8 HRB and 1224.5 MPa respectively.Similarly,the bending strength,abration ratio,and edge height of the sintered sample containing diamond reach their peak values at 900℃,which were 1030.9 MPa,225,and 183μm respectively.

关 键 词：高熵合金 金刚石工具 热压烧结 力学性能 

分 类 号：TG74[金属学及工艺—刀具与模具]