Top Material Tungsten Carbide Alloy

The microstructure, phase composition and hardness of the 40% nano-tungsten carbide alloy reinforced nickel-based alloy coating were prepared by high-speed oxygen flame spraying technology, and its friction and wear properties were evaluated. The results show that compared with the traditional tungsten carbide reinforced nickel-based alloy coating, the composition of the two types of coatings is the same, but the tungsten carbide particles in the nano-tungsten carbide reinforced nickel-based alloy coating are smaller in size and more evenly distributed, and its hardness is 10% higher than that of the traditional tungsten carbide reinforced nickel-based alloy coating, and the wear depth is 20% smaller.

1.Tungsten carbide alloy reinforced steel matrix composites are one of the hot spots in the research of composites. The casting infiltration method, thermal spraying method, powder sintering method, fusion injection method, ion injection infiltration method, surfacing welding method, laser cladding method, in-situ composite method, electrometallurgical fusion casting method and other process methods for the preparation of the composite materials, as well as the selection of tungsten carbide and steel matrix, interfacial reaction and strength, performance and application status of the composite materials. Influence of binders, other additives, tungsten carbide particle shape, particle size and distribution, pouring temperature, etc. on the cast-infiltration process and its surface composites. It is clarified that the casting infiltration method is a promising preparation process, and the combination of self-propagation process and casting process may achieve new results.

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