等离子体球化粉末LPBF制备WC-12Co的组织与性能

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

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-18 DOI:10.1016/j.ijrmhm.2025.107376

Qiaoyun Shen , Songyuan Hao , Zhenhua Hao , Rulong Ma , Pei Wang , Yongchun Shu , Jilin He

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引用次数: 0

摘要

本研究比较了激光粉末床熔合（LPBF）制备的WC-Co样品（等离子体球化和颗粒化粉末）。与颗粒状粉末相比，使用等离子球化粉末的lpbf处理样品的孔隙率降低了76.5%。结果表明，等离子球化WC-Co粉末显著改善了打印样品的致密性，这主要得益于其较高的激光吸收率。颗粒状粉末制备的LPBF-ed WC-Co样品硬度较低，主要是由于粗晶粒聚集，粗晶粒与细晶粒之间的界面更密。粒状粉末制备的LPBF-ed WC-Co试样的磨损机制主要为磨粒磨损，而等离子体球化WC-Co粉末制备的LPBF-ed WC-Co试样的磨损机制主要为磨粒磨损和粘着磨损的结合。由于α-Co的存在，用等离子体球化WC-Co粉末制备的LPBF-ed WC-Co样品具有更好的耐磨性。

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Microstructure and properties of WC-12Co fabricated by LPBF using plasma spheroidized powder

This study compares WC-Co samples fabricated via laser powder bed fusion (LPBF) using plasma spheroidized and granulated powders. The LPBF-processed samples using plasma-spheroidized powder exhibited a 76.5 % reduction in porosity compared to those fabricated with granulated powder. The results show that the plasma-spheroidized WC-Co powder significantly improves the densification of the printed samples which mainly benefits from its higher laser absorptivity. The LPBF-ed WC-Co sample obtained with granulated powder has lower hardness due to the aggregation of coarse grains and denser interfaces between coarse and fine grains. The wear mechanism of the LPBF-ed WC-Co sample obtained with granulated powder is mainly abrasive wear, while the wear mechanism of the LPBF-ed WC-Co sample obtained with plasma spheroidized WC-Co powder is a combination of abrasive wear and adhesive wear. Due to the presence of α-Co, the LPBF-ed WC-Co sample obtained with plasma spheroidized WC-Co powder has better wear resistance.

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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.