Preparation method of titanium carbide-silicon carbide whisker toughened high-strength tungsten-based alloy

A technology of silicon carbide whiskers and tungsten-based alloys, which is applied in the field of high-strength non-ferrous metal materials and high melting points, can solve problems such as interface pollution and grain growth, and achieve high structural stability, uniform distribution, and stable alloy structure Good results

Active Publication Date: 2017-08-25
北京智崴科技发展有限公司
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Problems solved by technology

However, due to the problems of interface pollution and grain growth in the sintering process, it is necessary to improve the toughness of tungsten-based alloys.

Method used

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Embodiment Construction

[0027] The best embodiment of the present invention is given below: according to the chemical composition and weight percentage of high-strength tungsten-based alloy matrix material: Ta: 0.1~0.3%, Nb: 0.1~0.6%, Mo: 0.2~0.8%, V: 0.1-0.5%, the rest is tungsten metal: 97.8-99.5%. The high-strength tungsten-based alloy powder prepared in proportion and absolute ethanol are mechanized ball milled in a ball mill for 24 hours to obtain ultrafine powder with a grain size of 50-150 μm. The chemical composition of titanium carbide-silicon carbide whisker precursor material is: polytetrachloroethylene, TiO 2 , Si, C, Mn, NaCl, the weight ratio is: 47.2:46::46:0.7:6.7. The precursor composite powder capable of generating titanium carbide-silicon carbide whiskers prepared in proportion plus absolute ethanol is mechanized ball milled in a ball mill for 24 hours to obtain an ultrafine precursor composite powder with a grain size of 200-800nm. The titanium carbide-silicon carbide whisker an...

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Abstract

The invention belongs to the field of high-melting-point and high-strength nonferrous materials, in particular to a preparing method of a high-strength tungsten-based alloy material toughened by titanium carbide and silicon carbide crystal whiskers. The high-strength tungsten-based alloy material consists of high-strength tungsten-based alloy base material powder and titanium carbide and silicon carbide crystal whisker powder. Magnesium alloy base powder is uniformly mixed with titanium oxide and titanium carbide crystal whisker powder by a mechanical mixing process, a vacuum-sintered hot-pressed ingot is enabled to deform through extrusion, and an in-situ generated high-strength tungsten-based alloy material toughened by the titanium carbide and silicon carbide crystal whiskers is obtained. As the in-situ generated tungsten alloy toughened by the titanium carbide and silicon carbide crystal whiskers has high tenacity, and at the same time, the wear resistance and the strength are greatly improved, the high-strength tungsten-based alloy material is particularly suitable for being used as materials for cutters, dies, aviation, aerospace and the like.

Description

technical field [0001] The invention belongs to the field of non-ferrous metal materials with high melting point and high strength, in particular a titanium carbide-silicon carbide whisker-toughened high-strength tungsten-based alloy material. Background technique [0002] Tungsten-based alloys are made of tungsten (the mass fraction of tungsten is usually 80%-97%) as the matrix, adding a small amount of other alloying elements and sintering by powder metallurgy liquid phase method. It has high melting point, high density, high thermal conductivity, low Thermal expansion coefficient, excellent high temperature strength and corrosion resistance, good mechanical processing and other comprehensive properties. It is widely used in aerospace, advanced nuclear energy, military equipment, medical materials, electronics and many other fields. With the development of the military industry, better requirements have been put forward for the performance of tungsten-based alloys. Tradit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/14C22C49/10C22C49/14C22C101/12
CPCC22C47/14C22C49/10C22C49/14
Inventor 徐淑波景财年林晓娟
Owner 北京智崴科技发展有限公司
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