27%クロム白鋳鉄による超硬合金の鋳ぐるみと組織評価 Microstructural Study at Interface of Chip Insert and 27 mass % Cr White Cast Iron
A high-performance high-chromium cast iron was developed using a scrapped throw away chip as the insert. Cemented carbide, cermet and coated carbide throw away chips were used in this study. These chips were inserted into the wear resistant 27 mass % Cr white cast iron. The structures at the interface of the chip and mother alloy were investigated by EPMA and EDS to clarify the mechanism of the reaction layer formation. The reaction layers at the interface of the cemented carbide and mother alloys consisted of two layers each above 100μm thick. These reaction layers were formed by diffusion from both the chip’s W, Ti, C and Co and the mother alloy’s Fe and Cr. The cermet chip formed a 10μm thick diffusion layer near the cermet surface without a reaction layer. Pouring temperature did not influence the thicknesses of both the reaction layer and diffusion layer. Moreover, the coated carbide chip did not form any of the layers.
- 鋳造工学 = Journal of Japan Foundry Engineering Society
鋳造工学 = Journal of Japan Foundry Engineering Society 70(12), 878-883, 1998-12-25