Microstructure and performance study of WC-12Co cemented carbide fabricated by material extrusion additive manufacturing

IF 4.6 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-10-17 DOI:10.1016/j.ijrmhm.2025.107504

Min-Hui Wang , Lai-Ma Luo , Yong-Qiang Qin , Xiang Zan , Yu-Cheng Wu

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引用次数: 0

Abstract

This study systematically investigates the application of material extrusion additive manufacturing in the fabrication of WC-12Co cemented carbide. A binder system suitable for the MEX process was developed, and the microstructure and mechanical properties of the MEX-fabricated carbide were analyzed. WC-12Co cemented carbide with a high relative density (99.6 %), high hardness (1339 HV), and excellent fracture toughness (15.88 MPa·m¹/²) was successfully fabricated using the MEX technique. The sintered microstructure revealed grain growth of WC into regular trigonal prism shapes, with a uniformly distributed Co phase forming a continuous network structure, significantly enhancing the material's crack propagation resistance. Mechanical testing showed a transverse rupture strength of 2610 MPa, indicating a favorable strength-toughness balance. Moreover, the material exhibited a low wear rate in friction and wear tests. The results demonstrate that MEX is an efficient and viable method for the additive manufacturing of high-performance, customized cemented carbide components, offering promising prospects for industrial applications and future development.

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材料挤压增材制造WC-12Co硬质合金的组织与性能研究

本研究系统地研究了材料挤压增材制造在WC-12Co硬质合金制造中的应用。开发了一种适合MEX工艺的粘结剂体系，并对MEX法制备的硬质合金的微观组织和力学性能进行了分析。采用MEX技术成功制备了相对密度高（99.6%）、硬度高（1339 HV）、断裂韧性好（15.88 MPa·m1/2）的WC-12Co硬质合金。烧结组织显示WC晶粒生长成规则的三角棱柱状，Co相均匀分布形成连续的网状结构，显著增强了材料的抗裂纹扩展能力。力学试验表明，横向断裂强度为2610 MPa，具有较好的强度-韧性平衡。此外，该材料在摩擦磨损试验中表现出较低的磨损率。结果表明，MEX是一种高效可行的高性能定制硬质合金部件增材制造方法，具有良好的工业应用前景和未来发展前景。

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来源期刊

$International Journal of Refractory Metals & Hard Materials$

International Journal of Refractory Metals & Hard Materials 工程技术-材料科学：综合

CiteScore

7.00

自引率

13.90%

发文量

236

审稿时长

35 days

期刊介绍： The International Journal of Refractory Metals and Hard Materials (IJRMHM) publishes original research articles concerned with all aspects of refractory metals and hard materials. Refractory metals are defined as metals with melting points higher than 1800 °C. These are tungsten, molybdenum, chromium, tantalum, niobium, hafnium, and rhenium, as well as many compounds and alloys based thereupon. Hard materials that are included in the scope of this journal are defined as materials with hardness values higher than 1000 kg/mm2, primarily intended for applications as manufacturing tools or wear resistant components in mechanical systems. Thus they encompass carbides, nitrides and borides of metals, and related compounds. A special focus of this journal is put on the family of hardmetals, which is also known as cemented tungsten carbide, and cermets which are based on titanium carbide and carbonitrides with or without a metal binder. Ceramics and superhard materials including diamond and cubic boron nitride may also be accepted provided the subject material is presented as hard materials as defined above.