Tungsten carbide base hard alloy powder metallurgical material and its preparation method

Abstract

The invention provides a tungsten carbide based cemented carbide powder metallurgical material and method for preparation, wherein the the constituents (by weight percentage) include WC 86-95%, Co 4-8%, Al 1-3%, TiC 0-2%, and VC 0-2%. The preparing process consists of pre-grinding, mixing, ball-grinding, and finally consolidating through electric current flash sintering method.

Description

technical field

[0001] The invention relates to plastic forming technology, powder metallurgy technology and rapid prototyping technology, in particular to a low-cost and high-performance tungsten carbide-based hard alloy powder metallurgy material and a preparation method thereof. Background technique

[0002] The existing tungsten carbide-based hard alloy materials are mainly composed of matrix tungsten carbide and cobalt as a binder phase, and are mainly prepared by preforming and radiation heating sintering. Due to the shortage of cobalt resources, the original cost of materials is high; the radiation heating sintering method takes a long time, consumes a lot of energy, and the sintering temperature is high, so the obtained sintered material has a coarse structure and low performance; In the presence of sintering pressure, it is difficult to control the dimensional accuracy of sintered materials, which limits the application of such materials to a certain extent. [000...