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Eutectic cermets

A technology of gold materials and crystal porcelain, which is applied in the field of eutectic ceramic gold engineering materials, can solve the problems of complex manufacturing process and high cost, and achieve the effects of good hardness stability, high toughness performance, and good high-temperature hardness performance

Inactive Publication Date: 2019-03-29
陈瑞凯
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  • Claims
  • Application Information

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Problems solved by technology

In recent years, most of the studies are based on WC and Co hard metals. The strengthening phase is derived from TiC and TaC, etc., and the cementing phase is derived from Mo, Ni, and Fe. These materials are commonly called "cermet composites" (Cermet composites) ;The main production process of traditional Hard metals hard metals and porcelain-gold composite materials is sintering, and the cement phase is added in a "small amount" of multiple components; And the manufacturing process is relatively complicated, the cost is high, and the working temperature of the composite material also has its limit

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Embodiment Construction

[0026] Other technical contents, features and functions of the present invention will be clearly presented in the following detailed description of preferred embodiments with reference to the drawings.

[0027] see figure 1 , its preparation method is as follows:

[0028] (1) In the present invention, the carbide powder (TiC, VC, ZrC, HfC, WC, NbC, TaC) is fully mixed with the tungsten metal block to weigh the required weight through the composition design, and placed in the water cooling of the vacuum arc melting furnace. 101 in the groove of the copper mold;

[0029] (2) Vacuumize the vacuum arc melting furnace afterwards (pump the chamber pressure to 2.4×10 -2 torr), pass pure argon (Ar gas) to increase the pressure to about 8.0torr, and then evacuate again (pump to 2.4×10-2torr, this action of passing Ar gas and then pumping is called purge), and the above action After repeated several times, Ar gas was finally passed to bring the chamber pressure back to 8.0torr and sm...

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Abstract

Eutectic cermet materials include at least two carbides and a refractory metal, wherein the carbide is selected from the group of TiC, VC, ZrC, HfC, WC, NbC and TaC, and the refractory metal is tungsten. The disclosed eutectic cermet material prepared is by smelting the carbide and the refractory metal together at a temperature lower than melting temperatures of the carbide and the refractory material. The melting temperature lowered by forming a eutectic composition is to prepare the eutectic cermet materials having a fine lamellar structure. The prepared eutectic cermet materials improve hardness and toughness at use.

Description

technical field [0001] The present invention relates to a kind of eutectic ceramic gold material, especially a kind of eutectic point that can pass through at least two kinds of carbides and a kind of refractory metal, so as to reduce the melting temperature, and prepare eutectic with layered structure by melting. Crystal porcelain gold engineering materials. Background technique [0002] Cemented carbides are cemented carbides, which are composite materials composed of WC and Co. In the early nineteenth century, Henri Moissan synthesized tungsten carbide (WC). Tungsten carbide has high hardness and was originally intended to be used as a substitute for diamonds, but it is inconvenient to be used in engineering because of its shortcomings such as brittleness and holes. 1923 and Baumhauer discovered that tungsten carbide and cobalt or nickel, after the sintering process, can simultaneously maintain the hardness of ceramic materials and the toughness of metals, which has h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10
CPCC22C1/1036C22C29/067C22C29/06C22C29/08C22C29/10
Inventor 陈瑞凯
Owner 陈瑞凯
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