G0400405 Influence of shape of WC on erosive wear behavior of cast-in insertion cast irons

Abstract

This study investigate that the influence of shape of WC on solid particle erosive wear of cast-in insertion cast irons. Shape and size of WC were φ5 × 50, φ8 × 50 and □ 8 × 50mm. The area raid of WC of test surface is 50% at maximum. The test specimens for erosive test were mechanically machined to be sized 50×50×14mm. Specimens were tested using a blast machine. A comparison of the base material and the cast-in insertion casting material. Erosion rate was decreased by insert casting the WC in all of the specimens. Also EDS surface analysis was performed detail in order to observe bonded surface of between WC and base metal of WC cast irons. All cylindrical shaped WC transverse-mounted specimen was observed reaction layer in bond surface. The hardness of reaction layer was higher as compared to that of base metal. On the other hand, square shaped WC transverse-mounted specimen, the void of about 50μm was observed in bond surface of between WC and base metal. Erosion rate of cylindrical shaped WC transverse-mounted decreased in relations to square shaped WC transverse-mounted. From these result, it's considered that it's important for superior erosive wear resistance to formation reaction layer.