Preparation of V-element-containing Co-based composite powders by spray conversion and its effect on the microstructure properties of cemented carbides

IF 5.8 2区 材料科学 Q2 CHEMISTRY, PHYSICAL
Neng Huang, Shengda Guo, Hongyu Ren, Jianfeng Guo, Bin Li, Jianbo Zhang, Ying Ye, Bangqiang Wang, Minjie Hu
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Abstract

This study synthesized cobalt powder containing vanadium (V) through a spray transformation process combined with calcination and reduction. WC-6Co cemented carbide was subsequently produced using spark plasma sintering (SPS). This research examined the distribution of vanadium within the cobalt-based composite powder, and WC-Co cemented carbide and its effects on the materials' microstructure and properties. It was found that pre-introducing vanadium suppressed the Co phase transition from fcc to hcp during reduction, resulting in an expanded Co lattice constant. Additionally, the formation of (W, V)CX carbides during sintering refined the WC grains, enhancing the comprehensive performance of the cemented carbide. Optimal Vickers hardness and wear resistance were achieved at a vanadium content of 1.0 wt.%, although there was a slight reduction in fracture toughness.

Abstract Image

喷雾转化法制备含v元素co基复合粉末及其对硬质合金组织性能的影响
本研究采用喷雾转化与煅烧还原相结合的工艺合成了含钒钴粉。随后采用火花等离子烧结(SPS)法制备WC-6Co硬质合金。研究了钒在钴基复合粉末和WC-Co硬质合金中的分布及其对材料组织和性能的影响。发现预引入钒抑制了还原过程中Co从fcc到hcp的相变,导致Co晶格常数增大。此外,烧结过程中形成的(W, V)CX碳化物细化了WC晶粒,提高了硬质合金的综合性能。当钒含量为1.0 wt.%时,合金的维氏硬度和耐磨性达到最佳,但断裂韧性略有降低。
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来源期刊
Journal of Alloys and Compounds
Journal of Alloys and Compounds 工程技术-材料科学:综合
CiteScore
11.10
自引率
14.50%
发文量
5146
审稿时长
67 days
期刊介绍: The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.
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