Low-sintering-temperature tungsten-nickel-iron alloy for shielding material

A low sintering temperature, tungsten-nickel-iron alloy technology, applied in the field of alloys, can solve the problems of poor structural performance, low mechanical strength, toxicity and other problems of shielding components, and achieve the effects of strong shielding ability, improved mechanical properties, and increased hardness

Inactive Publication Date: 2020-08-04
BEIJING BEIYE FUNCTIONAL MATERIALS CORP
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Problems solved by technology

[0004] The purpose of the present invention is to provide a low sintering temperature tungsten-nickel-iron alloy for shielding materials, which solves the problems of poor structural performance, low mechanical strength and toxicity of shielding components.

Method used

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Embodiment Construction

[0016] A tungsten-nickel-iron alloy with low sintering temperature for shielding material. The composition and weight percentage of the alloy are: W: 94%, Ni: 3.5%, Fe: 2.3%, Ge: 0.10%, and the rest are unavoidable impurities.

[0017] The preparation method of described alloy, concrete steps and parameters are as follows:

[0018] 1. Material preparation: The physical properties of the metal powder used are: the W content of tungsten powder is 99.99%, the particle size is 3μm; the Ni content of nickel powder is 99.95%, the particle size is 2μm; the Fe content of iron powder is 99.9%, the particle size is 4μm; germanium powder The Ge content is 99.999%, and the particle size is 400 mesh.

[0019] 2. Powder blending: Weigh the screened tungsten powder, nickel powder, iron powder, and germanium powder in a vacuum glove box filled with argon atmosphere according to the weight ratio. The weight percentage of the alloy powder is: W: 94%, Ni: 3.5 %, Fe: 2.3%, Ge: 0.10%;

[0020] 3...

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Abstract

The invention relates to a low-sintering-temperature tungsten-nickel-iron alloy for a shielding material, and belongs to the technical field of alloys. The alloy comprises, by weight, 91-98% of W, 2-6% of Ni, 1-3% of Fe, 0.05-0.3% of Ge and the balance unavoidable impurities. A preparation method comprises the following steps: 1 high-purity tungsten powder, nickel powder, iron powder and germaniumpowder are prepared and configured according to the mass percentage, and is put into a ball-milling tank along with a stainless steel ball with the diameter of 2-5 mm, and the ball-milling time is 4-8h; 2, alloy powder is pressed by an isostatic pressing machine, and the forming pressure is 200-400 MPa; and 3, the alloy powder is sintered in a vacuum furnace protected by argon atmosphere, the sintering temperature is 1000-1250 DEG C, and the alloy powder is cooled to the room temperature along the furnace and discharged from the furnace. The method has the advantages that the sintering temperature is effectively reduced, the energy consumption cost is reduced, and the requirements for equipment are reduced; and the alloy proportion is adopted, so that the hardness of the alloy is improved, the equipment is simple, the cost is low, and pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of alloys, in particular to a tungsten-nickel-iron alloy with low sintering temperature for shielding materials. Background technique [0002] Tungsten-nickel-iron alloy is an alloy based on tungsten (about 90-98%) and added with nickel, iron, copper or other components. The specific gravity is generally 17.0-18.5g / cm 3 . This type of alloy has good plasticity and machinability, good thermal conductivity and electrical conductivity, and has excellent absorption capacity for γ-rays or X-rays. It has the characteristics of large proportion, high strength, strong ability to absorb rays, large thermal conductivity, small thermal expansion coefficient, and good electrical conductivity, weldability, processability, etc. [0003] Based on the above characteristics, tungsten-nickel-iron alloys are mainly used in the manufacture of gyroscope rotors, guide devices and shock absorbers for aviation and spacecraft; die...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C22C1/04
CPCC22C1/045C22C27/04
Inventor 李重阳徐明舟李振瑞
Owner BEIJING BEIYE FUNCTIONAL MATERIALS CORP
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