Impact Wear Resistance of WC_p/Hadfield Steel Composite and Composite Structure

Abstract

The WCp/Hadfield steel composite and a composite-steel composite structure were manufactured by the squeeze casting method,the impact wear resistance of the WCp/Hadfield steel composite and the composite structure were investigated.Pure Fe powder was added into the WC particle preform and the surrounding region to control the structure of the interface between the steel and the composite in the composite structure. The results show that no melt of WC and no transition layer are formed at the interface between the steel and composite region in the composite structure, because the Fe powder absorbs a lot of heat and melt,however which is present in the composite. The wear rate of the composite is higher than the Hadfield steel, because of the material avalanched at the edge of the worn surface, but the wear resistance of the composite structure is improved by 1.34 times than Hadfield steel. Through the wear morphology analyzing, the reasons of the composite avalanching and the impact wear resistance mechanism for the composite structure were discussed.

Keywords

• WC_p/Hadfield steel composite
• interface
• composite structure
• impact abrasive wear