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Preparation method of high density tungsten-base alloy

A tungsten-based alloy and density technology, which is applied in the field of preparation of high-density tungsten-based alloys, can solve the problems of preparation, difficulty, and parts that cannot be processed, and achieve the effects of improving the degree of mixing, increasing the size, and prolonging the life

Active Publication Date: 2019-12-13
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increasing use of tungsten alloys, there are more and more tungsten alloy parts with complex structures. At the same time, higher requirements are put forward for the performance of tungsten alloys such as strength, hardness and elongation. Preparation of these parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment includes the following steps:

[0034] Step 1. Ni and Fe in the design composition of the target product 90W7Ni3Fe alloy are prepared into Ni-30Fe alloy spherical powder with a particle size of less than 50 μm by atomization;

[0035] Step 2. Weigh 900g of spherical tungsten powder with a particle size of less than 50μm and 100g of Ni-30Fe alloy spherical powder with a particle size of less than 50μm prepared in step 1 according to the design composition of the target product 90W7Ni3Fe alloy, and place them in the stainless steel cylinder of the roller mill mixer , then add absolute ethanol and stainless steel balls, then seal the stainless steel cylinder and rotate around the axis in the horizontal direction to roll and mix the powder for 8 hours to obtain the mixture; The ratio of the total mass of the -30Fe alloy spherical powder is 1:1; the volume of the absolute ethanol is 1.5 times the total volume of the stainless steel ball, tungsten powder and N...

Embodiment 2

[0043] This embodiment includes the following steps:

[0044] Step 1. Ni and Cr in the design composition of the target product 95W3Ni2Cr alloy are prepared by an atomization method into Ni-40Cr alloy spherical powder with a particle size of less than 50 μm;

[0045] Step 2. According to the design composition of the target product 95W3Ni2Cr alloy, weigh 950g of spherical tungsten powder with a particle size of less than 50μm and 100g of Ni-40Cr alloy spherical powder with a particle size of less than 50μm prepared in step 1, and place them in the stainless steel cylinder of the roller mill mixer , then add absolute ethanol and stainless steel balls, then seal the stainless steel cylinder and roll the powder around the axis in the horizontal direction for 10 hours to obtain the mixture; -The ratio of the total mass of the 40Cr alloy spherical powder is 1:1; the volume of the dehydrated alcohol is 2 times of the total volume of the stainless steel ball, tungsten powder and Ni-4...

Embodiment 3

[0053] This embodiment includes the following steps:

[0054] Step 1. Ni and Co in the design composition of the target product 95W3Ni2Co alloy are prepared into Ni-40Co alloy spherical powder with a particle size of less than 50 μm by atomization;

[0055] Step 2. According to the design composition of the target product 95W3Ni2Co alloy, weigh 950g of spherical tungsten powder with a particle size of less than 50μm and 100g of Ni-40Co alloy spherical powder with a particle size of less than 50μm prepared in step 1, and place them in the stainless steel cylinder of the roller mill mixer , then add absolute ethanol and stainless steel balls, then seal the stainless steel cylinder and rotate around the axis in the horizontal direction to roll and mix the powder for 9 hours to obtain the mixture; The ratio of the total mass of the -40Co alloy spherical powder is 1:1; the volume of the absolute ethanol is 1.7 times the total volume of the stainless steel ball, tungsten powder and ...

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Abstract

The invention discloses a preparation method of a high density tungsten-base alloy. The preparation method comprises the following steps: I, preparing non-main body alloy powder from elements, excepttungsten, in a tungsten-base alloy; II, rolling and mixing tungsten powder with the non-main body alloy powder to obtain a mixture; III, drying the mixture to obtain mixed powder; IV, drawing a three-dimensional model of the tungsten-base alloy and layering the model to obtain cut-layer data and cut-layer scanning data; V, preheating a formed bottom plate; VI, carrying out pre-sintering and fusionscanning successively after paving the powder to form a single-layered solid sheet; and VIII, carrying out formed bottom preheating, powder paving, pre-sintering and fusion scanning processes repeatedly to obtain the tungsten-base alloy. According to the preparation method, low-melting-point elements in the tungsten-base alloy are prepared into non-main body alloy powder which is rolled and mixedwith the tungsten powder first, so that a powder gathering phenomenon is reduced. Then low speed fusion scanning after pre-sintering is carried out, so that element powder except tungsten is adheredto each other, and therefore, movement caused by electron beam impact is avoided and the uniformity and density of the tungsten-base alloy are improved.

Description

technical field [0001] The invention belongs to the technical field of alloy preparation, and in particular relates to a preparation method of a high-density tungsten-based alloy. Background technique [0002] As a two-phase alloy, tungsten-based alloy has a series of excellent physical and mechanical properties such as high density, high strength and hardness, good electrical and thermal conductivity, high thermal expansion coefficient, good corrosion resistance and oxidation resistance, etc. It has been widely used in industries, such as gyro rotors and inertial rotating elements in the aerospace industry; used as armor-piercing projectiles and missile warheads in the military industry; used as shielding materials in the medical and health sector, etc. After years of development, tungsten-based alloys have developed into several series, such as W-Ni-Fe, W-Ni-Cr and W-Ni-Co. Traditional tungsten-based alloys are mostly prepared by powder metallurgy method, which is more su...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C1/04B22F3/105B33Y10/00B33Y70/00
CPCC22C27/04C22C1/045B33Y10/00B33Y70/00B22F10/00B22F10/34B22F10/28B22F10/366B22F12/13Y02P10/25
Inventor 杨广宇刘楠杨坤贾亮贾文鹏汤慧萍王建
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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