ZrO2添加量对等离子放电烧结制备WC-6Co组织和性能的影响

doi:10.12068/j.issn.1005-3026.2021.01.007

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (1): 43-48.DOI: 10.12068/j.issn.1005-3026.2021.01.007

ZrO₂添加量对等离子放电烧结制备WC-6Co组织和性能的影响

鲍君峰^1,2,3，于月光^2,3，贾成厂¹

(1.北京科技大学新材料技术研究院，北京100083； 2.矿冶科技集团有限公司，北京100160；3.北京市工业部件表面强化与修复工程技术研究中心，北京102206)

出版日期:2021-01-15 发布日期:2021-01-13
通讯作者: 鲍君峰
作者简介:鲍君峰(1980-)，男，辽宁营口人，北京科技大学博士研究生，矿冶科技集团有限公司教授级高级工程师；于月光(1965-)，男，江苏淮安人，矿冶科技集团有限公司教授级高级工程师，博士生导师；贾成厂(1949-)，男，河南商丘人，北京科技大学教授，博士生导师.
基金资助:
国家重点研发计划项目 (2017YFB0306100).

Effects of ZrO₂ Addition Amount on Microstructure and Mechanical Property of WC-6Co Prepared by Spark Plasma Sintering

BAO Jun-feng^1,2,3， YU Yue-guang^2,3， JIA Cheng-chang¹

1. Institute for Advanced Materials and Technology， University of Science and Technology Beijing， Beijing 100083， China; 2. BGRIMM Technology Group， Beijing 100160， China; 3. Beijing Engineering Technology Research Center of Surface Strengthening and Repairing of Industry Parts， Beijing 102206， China.

Online:2021-01-15 Published:2021-01-13
Contact: YU Yue-guang
About author:-
Supported by:
-

摘要/Abstract

摘要： 以WC-6Co为主体原料，通过添加不同含量的ZrO₂作为烧结助剂，采用SPS烧结技术制备出性能出众的WC-6Co硬质合金，研究了ZrO₂烧结助剂对硬质合金显微组织及力学性能的影响规律.结果表明:随着ZrO₂添加量的增加，试样的显微组织更加致密，相对密度更大，硬度和断裂韧性也有一定程度的增加.并且，当添加ZrO₂的质量分数为3%时，试样的相对密度达到96.7%，维氏硬度增加到20.28kN·mm^-2，断裂韧性增长到12.7MPa·mm^1/2，综合性能最优.研究发现，ZrO₂可以通过促进离子的扩散和颗粒的重排促进烧结，最终使得材料的相对密度和性能均得到提升.

关键词: WC-6Co硬质合金；显微组织；力学性能；等离子放电烧结；ZrO₂

Abstract: A series of WC-6Co cemented carbides with different amount of ZrO₂ addition were quickly prepared by spark plasma sintering (SPS) and the effects of ZrO₂ addition on the microstructure and mechanical properties of the alloys were investigated. The results show that with the increasing ZrO₂ additive amount， the microstructure of the sample becomes more condensed， the relative density is greater and the hardness and fracture toughness also increase. When the mass fraction of ZrO₂ addition is 3%， the performance of the tested sample is the best one， in which the relative density is 96.7%， the Vickers hardness is 20.28kN·mm^-2 and the fracture toughness is 12.7MPa·mm^1/2. It is found that the ZrO₂ can enhance the sintering by promoting the ion diffusion and the particle rearrangement， leading to the improvement of the relative density and mechanical property of the cemented carbides.

Key words: WC-6Co cemented carbide; microstructure; mechanical property; spark plasma sintering (SPS); ZrO₂

中图分类号:

TG146.4

鲍君峰，于月光，贾成厂. ZrO₂添加量对等离子放电烧结制备WC-6Co组织和性能的影响[J]. 东北大学学报（自然科学版）, 2021, 42(1): 43-48.

BAO Jun-feng， YU Yue-guang， JIA Cheng-chang. Effects of ZrO₂ Addition Amount on Microstructure and Mechanical Property of WC-6Co Prepared by Spark Plasma Sintering[J]. Journal of Northeastern University(Natural Science), 2021, 42(1): 43-48.

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ZrO₂添加量对等离子放电烧结制备WC-6Co组织和性能的影响

Effects of ZrO₂ Addition Amount on Microstructure and Mechanical Property of WC-6Co Prepared by Spark Plasma Sintering

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