1994•Journal of the Japan Society of Powder and Powder MetallurgyOpen access

Preparation of Hard Metal Bonded with Fe-Al Alloy.

Keizo Kobayashi, Kenji Miwa, Minoru Fukunaga, Masahiro N. Machida

Abstract

WC-8.6mass%Fe-1.4mass%Al and WC-6.7mass%Fe-3.3mass%Al alloys were prepared by sintering of wet-mixed powder of WC, Fe and AI at 1713K for 2.4ksec in a vacuum and then their hot isostatic pressing.The evaporation of 13% Al from WC-Fe-Al alloys have been observed in the fabricating process. The sintered WC-Fe-Al alloys have a fine microstructure. Especially, the WC-8.6mass%Fe-1.4mass%AI alloy, which has a few pores after sintering at 1713K, has 1.8GPa of TRS and 92.5HRA of hardness. Furthermore, the increase in weight due to oxidation in this alloy is about one half that of the conventional WC-12mass%Co alloy.

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Key concepts: Alloy, Materials science, Sintering, Metallurgy, Microstructure, Hot isostatic pressing, Hard metal, Pressing