烧结温度对WC-HEA硬质合金组织结构和摩擦学性能的影响

doi:10.13251/j.issn.0254-6051.2025.03.014

金属热处理 ›› 2025, Vol. 50 ›› Issue (3): 90-95.DOI: 10.13251/j.issn.0254-6051.2025.03.014

烧结温度对WC-HEA硬质合金组织结构和摩擦学性能的影响

常剑秀¹, 张露^1,2, 柳琪², 李珂尧², 宋佳星², 曹培培³, 彭祥阳³

1.西安石油大学材料科学与工程学院, 陕西西安 710065;
2.西安稀有金属材料研究院有限公司, 陕西西安 710016;
3.中广核研究院有限公司, 广东深圳 518031

收稿日期:2024-10-09 修回日期:2025-01-13 出版日期:2025-03-25 发布日期:2025-05-14
通讯作者: 柳琪,工程师,博士,E-mail:liuqirmi@163.com
作者简介:常剑秀(1989—),女,副教授,博士,主要研究方向为高温合金的成分设计及性能研究,E-mail:jxchang11s@alum.imr.ac.cn。
基金资助:
陕西省自然科学基金(2018JQ5198);秦创原引用高层次创新创业人才项目(QCYRCXM2023-036)

Effect of sintering temperature on microstructure and tribological properties of WC-HEA cemented carbide

Chang Jianxiu¹, Zhang Lu^1,2, Liu Qi², Li Keyao², Song Jiaxing², Cao Peipei³, Peng Xiangyang³

1. School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an Shaanxi 710065, China;
2. Xi'an Rare Metal Materials Institute Co., Ltd., Xi'an Shaanxi 710016, China;
3. China Nuclear Power Technology Research Institute Co., Ltd., Shenzhen Guangdong 518031, China

Received:2024-10-09 Revised:2025-01-13 Online:2025-03-25 Published:2025-05-14

摘要/Abstract

摘要： 采用CrFeNiCu_0.5高熵合金(HEA)替代传统金属粘结相(Co、Fe及Ni),并结合真空热压烧结法成功制备了WC-CrFeNiCu_0.5(HEA)新型硬质合金,探究了不同烧结温度(1050、1100、1200和1300 ℃)下WC-HEA硬质合金的组织结构演变及其对摩擦磨损性能的影响。结果表明,不同温度烧结WC-HEA硬质合金的物相主要包含WC和FCC相,以及少量的Cu-Fe合金和M₃W₃C亚稳态碳化物。当烧结温度为1100 ℃时,WC-HEA硬质合金表现出最高的致密性和最低的磨损率,孔隙率仅5.15%±0.6%,磨损率0.96×10^-6 mm³·N^-1·m^-1,耐磨性最优。不同温度烧结WC-HEA硬质合金的磨损机制均以磨粒磨损为主,并伴随轻微的粘着磨损。

关键词: WC-HEA硬质合金, 烧结温度, 孔隙率, 耐磨性

Abstract: A novel cemented carbide WC-CrFeNiCu_0.5 (HEA) was successfully fabricated by substituting CrFeNiCu_0.5 high-entropy alloy for the conventional metal binder (Co, Fe, and Ni) and vacuum hot-pressing sintering method. The microstructure evolution of the WC-HEA cemented carbide sintered at different temperatures (1050, 1100, 1200, and 1300 ℃) and its influence on the friction and wear properties were systematically investigated. The results show that the phases of the WC-HEA cemented carbide sintered at different temperatures mainly include WC and FCC phases, as well as a small amount of Cu-Fe alloy and metastable carbide M₃W₃C. When the sintering temperature is 1100 ℃, the WC-HEA carbide shows the highest densification and the lowest wear rate, with a porosity of only 5.15%±0.6% and a wear rate of 0.96×10^-6 mm³·N^-1·m^-1, resulting in the best wear resistance. The wear mechanisms of the WC-HEA cemented carbides sintered at different temperatures are mainly abrasive wear, accompanied by slight adhesive wear.

Key words: WC-HEA cemented carbide, sinter temperature, porosity, wear resistance

中图分类号:

TG156.8

常剑秀, 张露, 柳琪, 李珂尧, 宋佳星, 曹培培, 彭祥阳. 烧结温度对WC-HEA硬质合金组织结构和摩擦学性能的影响[J]. 金属热处理, 2025, 50(3): 90-95.

Chang Jianxiu, Zhang Lu, Liu Qi, Li Keyao, Song Jiaxing, Cao Peipei, Peng Xiangyang. Effect of sintering temperature on microstructure and tribological properties of WC-HEA cemented carbide[J]. Heat Treatment of Metals, 2025, 50(3): 90-95.

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烧结温度对WC-HEA硬质合金组织结构和摩擦学性能的影响

Effect of sintering temperature on microstructure and tribological properties of WC-HEA cemented carbide

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