Composite Tungsten Carbide Insert With Heterogeneous Composition And Structure And Manufacturing Method Thereof

摘要

A composite tungsten carbide insert (B, I) with heterogeneous composition and structure has a working part (W) and a non-working part (N). The working part (W) is made of a tungsten carbide material consisting of tungsten carbide powder and cobalt powder or nickel. The non-working part (N) is made of a low density tungsten carbide material consisting of titanium carbide powder, tungsten carbide powder, and cobalt powder or nickel powder. During pressing, the tungsten carbide material for the working part (W) and the low density tungsten carbide material for the non-working part (N) are weighed and added to a steel die successively for molding and then sintering. The non-working part (N) which accounts for most of the overall product volume has low density and less material consumption, and can greatly reduce the raw material costs of the product, significantly improving the performance-cost ratio of the insert (B, I).

主权项

1. A composite tungsten carbide insert with heterogeneous composition and structure, comprising:
the insert consists of a working part and a non-working part; the working part is made of a tungsten carbide material consisting of uniformly mixed tungsten carbide powder (80-92%) and cobalt powder or nickel powder (8-20%) by weight, with a layer thickness of 5-30 mm; the non-working part is made of a low density tungsten carbide material consisting of 30-60% of titanium carbide powder (with a density of 4.93 g/cm3), 20-60% of tungsten carbide powder (with a density of 15.79 g/cm3), and 10-20% of cobalt powder or nickel powder (with a density of 8.9 g/cm3) by weight; and wherein during pressing, the tungsten carbide material for the working part is weighed and added to a steel die, then the low density tungsten carbide material for the non-working part is weighed and added to the die, a pressure is exerted on the two materials for molding, then the molded product is placed in a sintering furnace for sintering, and the resulting sintered product forms two parts, i.e., the composite tungsten carbide insert with homogeneous composition and structure.