Preparation and Impact‐Abrasive Wear Behavior of NbC‐Reinforced Iron Matrix Composites

Abstract

Workpieces in the field of mining machinery are prone to failure under the combined effect of impact and abrasive, causing serious economic losses to enterprises. A large number of ceramic particle reinforced Fe matrix composite materials are applied in this field to effectively improve the impact resistance and abrasive wear resistance of materials and extend the life of related equipment. In this study, both pure Fe matrix composites and NbC particle (NbCp) reinforced Fe composites (NbCp/Fe) samples were produced by vacuum sintering method, respectively and their resistance to impact‐abrasive wear was tested on the MLD‐10B impact‐abrasive wear rig. The results show that the hardness of NbCp/Fe composite increases with the increase of NbCp mass fraction, and the density decreases when the mass fraction of NbCp is less than 7%. At this time, the homogeneity of the composite is higher; When the mass fraction of NbCp is greater than 7%, the standard deviation values of hardness and density are larger, fluctuate greatly, have low uniformity, and agglomeration occurs within the organization; When the mass fraction of NbCp is 7%, composite possessed better comprehensive performance. The impact‐abrasive wear mechanism of the Fe matrix material primarily includes micro‐cutting, impact plastic deformation, and fatigue spalling, which is a typical abrasive wear mechanism; the impact‐abrasive wear mechanisms of NbCp/Fe composites primarily comprises micro‐cutting or micro‐plowhing, impact plastic deformation, and fatigue spalling.This article is protected by copyright. All rights reserved.