W-WC-TiC-Hf-Co alloy rod and preparation method thereof

An alloy rod, WC1%-5% technology, applied in the field of W-WC-TiC-Hf-Co alloy rod and its preparation, can solve the problems that the comprehensive mechanical properties cannot be greatly improved, and achieve low oxygen content, reduce Extrusion temperature and extrusion ratio, the effect of high purity

Inactive Publication Date: 2017-06-13
XIAN HUASHAN METAL PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • W-WC-TiC-Hf-Co alloy rod and preparation method thereof

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preparation example Construction

[0027] A kind of preparation method of W-WC-TiC-Hf-Co alloy rod, its preparation steps are:

[0028] (1) Mix tungsten carbide powder, titanium carbide powder, hafnium powder, cobalt powder and tungsten powder uniformly by wet ball milling, and obtain mixed powder after vacuum drying;

[0029] (2) Compress the mixed powder described in step (1) to obtain a billet, and then place the billet in a vacuum sintering furnace at a vacuum degree not greater than 5×10 -2 Pa, under the condition of 1200°C-1500°C, heat preservation for 2h-3h for sintering treatment, and obtain a sintered body after cooling with the furnace;

[0030] (3) The sintered body described in step (2) is placed in an electron beam melting furnace, and the vacuum degree is not greater than 1×10 -2 Electron beam smelting under the condition of Pa for 2-5 times, after natural cooling, peeling treatment is carried out to obtain ingots; the current of the electron beam smelting is 3A-5A, and the voltage of the electro...

Embodiment 1

[0037] Example 1: A W-WC-TiC-Hf-Co alloy rod, composed of the following components by mass percentage: WC 3%, TiC 5%, Hf 3%, Co 3%, the balance is W and unavoidable of impurities.

[0038] The preparation method of the present embodiment W-WC-TiC-Hf-Co alloy bar comprises the following steps:

[0039] (1) Put tungsten carbide powder, titanium carbide powder, hafnium powder, cobalt powder and tungsten powder in a ball mill, use absolute ethanol as a dispersant, wet method under the conditions of rotation speed 350rpm and ball-to-material ratio 3:1 Ball milling for 5 hours, drying under vacuum conditions after ball milling to obtain mixed powder; the volume of the absolute ethanol is 2.5 times the sum of the mass of tungsten carbide powder, titanium carbide powder, hafnium powder, cobalt powder and tungsten powder, wherein the volume The unit is mL, and the unit of mass is g. The mass purity of the tungsten carbide powder, titanium carbide powder, hafnium powder, cobalt powder ...

Embodiment 2

[0046] Example 2: A W-WC-TiC-Hf-Co alloy rod consisting of the following components by mass percentage: WC 1%, TiC 2%, Hf 1%, Co 1%, the balance is W and unavoidable of impurities.

[0047] The preparation method of the present embodiment W-WC-TiC-Hf-Co alloy bar comprises the following steps:

[0048] (1) Put tungsten carbide powder, titanium carbide powder, hafnium powder, cobalt powder and tungsten powder in a ball mill, use absolute ethanol as a dispersant, wet method under the conditions of rotation speed 350rpm and ball-to-material ratio 3:1 Ball milling for 5 hours, drying under vacuum conditions after ball milling to obtain mixed powder; the volume of the absolute ethanol is 2.5 times the sum of the mass of tungsten carbide powder, titanium carbide powder, hafnium powder, cobalt powder and tungsten powder, wherein the volume The unit is mL, and the unit of mass is g. The mass purity of the tungsten carbide powder, titanium carbide powder, hafnium powder, cobalt powder...

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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 rod 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 very wide range of uses in the fields of national defense and military industry, aerospace, electronic information, energy, metallurgy and mechanical processing 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, and their tungsten content is 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 high strength, good ductility, good impact toughness and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C22C32/00C22C1/02C22B9/22
CPCC22B9/228C22C1/02C22C27/04C22C32/0052
Inventor 常喜张力力王占峰翁永胜翁晓东
Owner XIAN HUASHAN METAL PROD CO LTD
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