A kind of w-wc-tic-hf-co alloy bar and its preparation method

Abstract

The invention discloses a W-WC-TiC-Hf-Co alloy rod and a preparation method thereof, and relates to the technical field of alloy materials. The W-WC-TiC-Hf-Co alloy rod is prepared from the following raw materials in percentage by mass: 1 to 5 percent of WC, 2 to 8 percent of TiC, 1 to 5 percent of Hf, 1 to 5 percent of Co and the balance of W and unavoidable impurities; the preparation method of the W-WC-TiC-Hf-Co alloy rod comprises the following steps: (1) uniformly mixing tungsten powder, tungsten carbide powder, titanium carbide powder, hafnium powder and cobalt powder by adopting a wet ball milling method, and performing vacuum drying to obtain mixed powder; (2) performing vacuum sintering to obtain a sintering body; (3) smelting 2 to 5 times by electron beams to obtain an ingot; (4) performing thermal extruding to obtain a semi-finished rod blank; (5) performing thermal extruding to obtain an alloy rod. The W-WC-TiC-Hf-Co alloy rod disclosed by the invention has high hardness, high strength and excellent comprehensive mechanical properties, and has wide application prospect in aerospace field, national defence industry, electronic information, energy resources and the like.

Description

Technical field [0001] The invention relates to the technical field of alloy material preparation, in particular to a W-WC-TiC-Hf-Co alloy bar and a preparation method thereof. Background technique [0002] Refractory metal tungsten alloy has a series of excellent mechanical properties such as high density and high strength. It has a wide range of uses in the fields of national defense, aerospace, electronic information, energy, metallurgy and machining industries, and plays an important role in the national economy. Status. High-density tungsten alloys generally refer to W-WC-TiC, W-WC-Cu, and W-Cu alloy systems with a tungsten content of 85%-99%. The common feature of these alloys is high density (16.5-19.0g / cm 3 ), small thermal expansion coefficient, good corrosion resistance and oxidation resistance, good electrical and thermal conductivity, and some alloys also have many other excellent properties such as high strength, good ductility, and good impact resistance. Therefor...

AI Technical Summary

Problems solved by technology

However, traditional tungsten alloys cannot greatly improve their comprehensive mechanical properties due to their own defects and limitations of preparation processes.

Images