不同方法制备的球形铸造碳化钨粉末的性能研究.pdf

粉末冾金エ业
2017年8月
POWDER METALLURGY INDUSTRY
Aug.2017
DOL:10.13228j. boyuan.issn006-6543.20160058
不同方法制备的球形铸造碳化钨粉未的性能硏究
王蕾,刘辛,谢焕文,邹黎明,蔡一湘
(广东省科学院广东省材料与加工研究所,广东广州510650)
摘要:球形铸造碳化钨粉末是一种新型的超耐磨陶瓷颗粒材料,对比研究了不同方法制备的球形锛造碳化
钨粉末的化学成分、显微形貌、微观组织、相结构、显微硬度、流动性以及松装密度等特性。结果表明:相对等
离子重熔球化法和感应重熔球化法何言,等离子旋转电极雾化法制备的球形铸造碳化钨的总碳含量与共晶碳
含量理论值的偏差最小、游离碳和杂质含量最低;粉末颗粒内部更致密、共晶组织更细密、显微硬度最高。感
应重熔球化方法制得的粉末流动性最好、松装密度最大
关键词:球形铸造碳化钨粉末;等离子旋转电极雾化;显微硬度
文献标志码:A
文章编号:1006-6543-(2017)04-0007-05
Study on the properties of spherical cast tungsten carbide powders prepared by
different methods
WANG Lei, LIU Xin, XTE Huan-wen, ZOU Li-ming, CAI Yi-xiang
(Guangdong Institute of Matcrials and Proccssing, Guangdong Academy of Scicnces, Guang/hou 510650
Abstract: The spherical cast tungsten carbide powder is a kind of new potential wear-resistance ceramic material
The chemical composition, morphology, microstructure, phase composition, micro-hardness, flowability, loose
density and other characteristics of spherical cast tungsten carbide powders prepared by different methods were in
vestigated. The results indicate that, compared with plasma re-melting spheroidizing and induction re-mclting
spheroidizing, the deviation valuc bctwecn the total carbon content and the theoretical carbon contcnt of spherical
cast tungstcn carbides fabricated by plasma rotation clectrode atomization mcthod is the smallest, and the content
of frce carbon and impurities are the lowest. Furthermore, the corresponding powder particles fabricated by plas
mma otation clectrodc atomization mcthod are denser. the cutcctic microstructure is liner and microhardness is
higher than those fabricated by other methods. Spherical cast tungstcn carbides fabricated by induction rc-mclting
spheroidizing have the best flowability and the highest loose densit
Key words: spherical cast tungsten carbide powder; plasma rotation electrode atomization; microhardness
铸造碳化钨粉末作为一种重要的硬面材料,正钨粉和生产过程中的返回料混合均匀后进行熔炼,
在电力、能源、石油、化工、治金、机械等工业部件的生产的碳化钨粉末颗粒大多呈片状、长条状或多角
表面耐磨防护中发挥着越来越重要的作用。传状,晶体中针状共晶組织含量少。这种粉末在堆
统的碳化钨生产方法是将一定碳含量的碳化钨粉、焊涂敷或激光熔敷时,常在涂层中形成较大应力集
基金项目:国家国际科技合作专顶(2011DFR50740):广东省战略性新兴产业核心技术攻关专项(2011A091102007):广州市科技计划项目
12J5100050);广东省科学院科研平台环境与能力建设专项(2016 GDASPT-0209
作者简介:王蕾(1981),女,硕士,1程师,主要从事金属和陶瓷粉体的制备及应用研究
通讯作者:辛(1981),明,博十,高级工程师,主要从事金属和陶溢粉体的制备及应研究
收稿日期:2016-05-17
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