ＷＣ－（Ｆｅ－Ｃｒ－Ｃ）系焼結超硬合金の諸性質

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  • Some properties of sintered WC-(Fe-Cr-C) alloys.
  • WC Fe Cr C ケイ ショウケツ チョウコウ ゴウキン ノ ショ セイシ

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A high chromium cast iron (Fe-27Cr-3.1C) was applied to a binder of WC base cemented carbide because of its superior wear, corrosion and oxidation resistances, and some properties of the sintered WC-(Fe-Cr-C) alloys were investigated.<BR>The results of this work are summarized as follows:<BR>(1) The uniform and hard alloys were obtained by means of conventional vacuum sintering process, and these alloys were composed of WC, α-Fe and (Fe-Cr)7C3 phases.<BR>(2) The hardness of this alloy was higher than that of WC-Co alloy, and highest Vicker's hardness of 2000 could be achieved.<BR>(3) Wear resistance of this alloy was better than that of WC-Co alloy.<BR>(4) Except in 10% HNO3, corrosion resistance of this alloy against some acids was similar to that of WC-Co alloy.<BR>(5) Oxidation resistance of this alloy at high temperature was better than that of WC-Co alloy and was the same as that of TiC-TiN cermet.<BR>These improved properties of this alloy will be mainly caused by a (Fe-Cr)7C3 phase dispersed in the binder of this alloy.

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