ＷＣ‐高クロム鋳鉄系焼結硬質材料の鋳ぐるみ接合性

Abstract

In the application of hard materials as a part of wear-resistant components, casting by inserting WC-based cemented carbide presents difficulties.In a previous paper we reported that a WC-(high chromium cast iron) alloy, developed with the aim of improving the insertion property of WC-based hard materials by replacing the cobalt binder in WC-based cemented carbide with high chromium iron, had powder injection abrasion properties similar to those of the conventional WC-based cemented carbide.In this paper, we report on the insertion bonding property of that WC-(high chromium cast iron) alloy. We obtained the following results to insert WC-(high chromium cast iron) alloy by high chromium cast iron.(1) The WC-(high chromium cast iron) alloy was confirmed to have better insertion properties than the conventional WC-based cemented carbide, but fine cracks were observed at the joint.(2) When the WC-(high chromium cast iron) alloy was treated by applying a cast iron coating to its surface prior to insertion, no cracks were observed at the joint and the good joint strength was obtained.