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- 초미립 WC-10%Co 초경합금의 물성에 미치는 타탄화물 첨가의 영향
- Effects of the Addition of Other Carbides on the Properties of Submicron WC-10% Co Cemented Carbides
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Journal of Korean Powder Metallurgy Institute 1996;3(2):86-90
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Abstract
The effects of added VC, Cr_3C_2 and TaC on the microstructures and properties of submicron WC-10%Co cemented carbides. The relative sintered density of compact was increased by addition of Cr_3C_2 but decreased oppositely by addition of VC or TaC. The growth of WC grains was significantly suppressed by addition of these carbides. The hardness of these alloys was increased by addition of other carbides and showed a maximum value by simultaneously added VC and Cr_3C_2. The transverse rupture strength(T.R.S.) was in- creased by addition of Cr_3C_2, while it was decreased by addition of VC or TaC. The relative sintered density and T.R.S. of these alloys were improved by HIP-treatment. The maximum T.R.S. was 328kg/mm2 in the Wc-10%Co cemented carbide with addition of 0.5%VC.
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