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Heavy-density tungsten alloy

A technology of tungsten alloy and high specific gravity, which is applied in the field of powder metallurgy, can solve the problem that mass blocks cannot meet more and more various requirements of mass blocks, and achieve the effect of high hardness, high density and low sintering temperature

Inactive Publication Date: 2015-12-16
AAC PRECISE MFG TECH CHANGZHOU
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Problems solved by technology

[0004] The invention provides a sintering process of high specific gravity tungsten alloy, and the sintered tungsten alloy can solve the technical problem that mass blocks made of traditional materials cannot meet more and more various requirements for mass blocks

Method used

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Embodiment Construction

[0013] The present invention is described in detail below in conjunction with embodiment, but it does not limit the scope of the present invention in any way.

[0014] A high specific gravity tungsten alloy provided by the present invention is formed by injecting granular high specific gravity tungsten alloy feed material into a desired shape through metal powder injection molding (Meteinjectionmolding, MIM for short), and then sintering. The high specific gravity tungsten alloy is an alloy material with W as the base material and a small amount of elements such as Ni, Cu, Fe, Co, etc., wherein the W accounts for ≥85% by mass of the tungsten alloy, so that the tungsten The density of the alloy is as high as 16.5-19.0g / cm 3 , the thermal conductivity can reach 5 times that of abrasive steel, and it can be welded with copper and silver solders. The ray absorption capacity is 30-40% higher than that of lead. It can be widely used as shielding and breeding materials in military, m...

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Abstract

The invention provides a sintering process for a heavy-density tungsten alloy. The process comprises the following steps: batching: providing granular tungsten alloy feedstock; forming: injecting the tungsten alloy feedstock into a mold to form a tungsten alloy green body; solvent degreasing: placing the tungsten alloy green body in a water bath for solvent degreasing; atmosphere hot degreasing: performing atmosphere hot degreasing of the tungsten alloy green body subjected to solvent degreasing; and atmosphere sintering: performing atmosphere sintering of the tungsten alloy green body subjected to hot degreasing, and performing cooling to obtain the heavy-density tungsten alloy. The heavy-density tungsten alloy sintered according to the sintering process provided by the invention has high density, high hardness, no magnetism, low sintering temperature, low thermal expansion coefficient and the like, can meet the requirements for high temperature, high humidity, salt fog and the like, and has physical, chemical and mechanical properties approximate to those of forge pieces.

Description

【Technical field】 [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a sintering process of a high specific gravity tungsten alloy. 【Background technique】 [0002] Metal powder injection molding technology (MIM) is the product of the interpenetration and intersection of multiple disciplines such as plastic molding technology, polymer chemistry, powder metallurgy technology and metal material science. It can use molds to inject molded blanks and quickly manufacture high-quality materials through sintering. Structural parts with high density, high precision, and three-dimensional complex shapes can quickly and accurately materialize design ideas into products with certain structural and functional characteristics, and can directly mass-produce parts, which is a new revolution in the manufacturing technology industry. This process technology not only has the advantages of less conventional powder metallurgy process steps, no c...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C27/04
Inventor 邬海燕王晶
Owner AAC PRECISE MFG TECH CHANGZHOU
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