Tungsten carbide particle reinforced steel matrix surface-layer composite material and preparation method thereof

The invention discloses a tungsten carbide particle reinforced steel matrix surface-layer composite material and a preparation method thereof and belongs to the technical field of preparation of a wear-resistant material. The composite material is composed of three layers which are respectively a composite layer, a transition layer and a base material layer; the transition layer is positioned between the composite layer and the base material layer; the composite layer is mixed powder of tungsten carbide particles and 45 steel metal powder; the transition layer is mixed powder of tungsten powder and 45 steel metal powder; the base material layer is 45 steel metal powder; the preparation method of the tungsten carbide particle reinforced steel matrix surface-layer composite material comprises the following steps: firstly preparing powder, subsequently pressing a prefabricated blank and finally performing vacuum sintering to obtain the tungsten carbide particle reinforced steel matrix surface-layer composite material; according to the preparation method disclosed by the invention, the preparation temperature is relatively low; reinforcing particles are uniformly distributed in a base body commendably; the prepared tungsten carbide particle reinforced steel matrix surface-layer composite material is free of impurities, relatively high in performances, beneficial for environmental protection, capable of serving under complicated working conditions such as shock chilling, shock heating, impact and abrasion, and relatively good in impact resistance and oxidation resistance.