Effect of Sintering Temperature on the Interfacial Microstructure and Properties of Steel Bonded Carbide Composite Wear-resistant Plate

The steel bonded carbide/Q235 steel composite wear-resistant plate was prepared by vacuum sintering to address the problems of insufficient wear resistance of single steel wear-resistant plates, poor impact resistance and limited thickness of wear-resistant layer of hardfacing wear-resistant plates. The effects of sintering temperature on the microstructure and properties of the composite plates were explored. The results showed that there was a layer of mutual dissolution zone at the interface. Diffusion of C, Mn and Ni atoms resulted in a metallurgical bond. With the increase of the sintering temperature, the width of the mutual dissolution zone increased significantly, the microhardness increased first and then decreased. Meanwhile, the interfacial shear strength decreased gradually, the impact toughness increased first and then decreased.