秦永强,袁健,罗来马,田宇,彭宇强,吴玉程

• 1:合肥工业大学材料科学与工程学院
• 2:有色金属与加工技术国家地方联合工程研究中心
• 3:高性能铜合金材料及成形加工教育部工程研究中心

摘要(Abstract)：

采用固液掺杂法和放电等离子烧结制备了WC-Co-Y_2O_3硬质合金，随后对其进行了不同温度的退火处理。采用光学显微镜、X射线衍射仪(XRD)、扫描电镜(SEM)和维氏硬度计等研究了热处理前后WC-Co-Y_2O_3硬质合金的显微组织和力学性能。结果表明：氧化钇的加入可以细化WC-Co-Y_2O_3合金中的WC晶粒，提高了合金的维氏硬度和断裂韧性；随着退火温度的升高，WC-Co-Y_2O_3合金的维氏硬度逐渐降低，断裂韧性先升高后降低；WC-Co-Y_2O_3合金在500℃退火时拥有最佳的综合性能，维氏硬度为(1377±15) HV30,断裂韧性为(13.0±0.4) MPa·m~(1/2)。

关键词(KeyWords)： WC-Co-Y_2O_3硬质合金;放电等离子烧结;弥散强化;退火

Abstract:

Keywords:

基金项目(Foundation): 安徽省自然科学基金项目(2208085ME122);; 安徽省科技重大专项项目(202103a05020002);; 国家地方联合工程研究中心开放课题项目(HKDNM2021018);; 国家重点研发计划资助项目(2019YFE03120002)

作者(Author): 秦永强,袁健,罗来马,田宇,彭宇强,吴玉程

DOI: 10.13289/j.issn.1009-6264.2022-0657

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