Processing of hardmetal coatings on steel substrates

被引：0
|
作者：
Put, S [1 ]
Vleugels, J [1 ]
Anné, G [1 ]
Van der Biest, O [1 ]
机构：
[1] Katholieke Univ Leuven, Dept Met & Mat Engn, B-3001 Louvain, Belgium
来源：
ELECTROPHORETIC DEPOSITION: FUNDAMENTALS AND APPLICATIONS, PROCEEDINGS | 2002年 / 2002卷 / 21期
关键词：
D O I：
暂无
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The potential to apply WC-Co based hardmetal coatings on steel substrates by means of electrophoretic deposition and subsequent hybrid microwave heating is reported. Crack-free WC-Co powder layers with a green density of 43 % were deposited on cylindrical carbon steel, stainless steel and high speed steel substrates from an acetone-based suspension. The thickness of the green hardmetal coating could be precisely controlled by the EPD process. Moreover, EPD of coatings is a very fast processing technique with processing times below 10 seconds. Fast firing procedures established by means of hybrid microwave heating allowed full densification of the coatings, with a sintered thickness up to 200 gm. Microstructural investigation revealed a gradient concentration profile in the densified coating, caused by the interdiffusion of iron and alloying elements from the substrate. Hardness measurements indicated that the coating was about 6 GPa harder than the thermally quenched steel substrate material. With a high speed steel substrate, the hardness of the coating was about 13.5 GPa.
引用
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页码：183 / 190
页数：8
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