Tungsten aluminum-nickel alloy sintered body and preparation thereof

A technology of sintered body and nickel alloy, which is applied in the field of tungsten-aluminum-nickel alloy sintered body and its manufacturing method, can solve the problems of easy oxidation, difficult processing, high price, etc., and achieve the effect of superior performance

Inactive Publication Date: 2009-03-04
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal tungsten has the disadvantages of high density, easy oxidation, expensive, brittle and difficult to process.

Method used

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  • Tungsten aluminum-nickel alloy sintered body and preparation thereof
  • Tungsten aluminum-nickel alloy sintered body and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: 30 grams (W 0.9 al 0.1 ) alloy and 3.33 grams of nickel powder are mixed and cold-pressed, put into a graphite mould, put into a vacuum hot-press sintering machine, at 10 -2 Hot-pressing sintering under Pa vacuum condition, sintering temperature is 1600°C, pressure is 40MPa, and sintering time is 30 minutes to obtain tungsten-aluminum-nickel alloy sintered body. The relative density is 99%. The microhardness is 7.61GPa, and the bending strength is 1450MPa.

Embodiment 2

[0012] Embodiment 2: will be 25 grams, (W 0.75 al 0.25 ) alloy and 2.78 grams of nickel powder are mixed and cold-pressed, put into a graphite mould, put into a vacuum hot-press sintering machine, at 10 -2 Hot-pressing sintering under Pa vacuum condition, sintering temperature is 1600°C, pressure is 40MPa, and sintering time is 30 minutes to obtain tungsten-aluminum-nickel alloy sintered body. The relative density is 99.1%. The microhardness is 7.83GPa, and the bending strength is 1470MPa.

Embodiment 3

[0013] Embodiment 3: 20 grams (W 0.5 al 0.5 ) alloy and 2.22 grams of nickel powder are mixed and then cold-pressed, put into a graphite mould, put into a vacuum hot-press sintering machine, at 10 -2 Hot-pressing sintering under Pa vacuum condition, sintering temperature is 1600°C, pressure is 40MPa, and sintering time is 30 minutes to obtain tungsten-aluminum-nickel alloy sintered body. The relative density is 99.5%. The microhardness is 8.03GPa, and the bending strength is 1500MPa.

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Abstract

The invention relates to a tungsten aluminum-nickel sintered body which is characterized by comprising tungsten aluminum powder and nickel powder; the expression formula of the tungsten aluminum powder is W1-xAlx, wherein, x is equal to 0.1 to 0.86; the mass proportion of the nickel powder in the sintered body is 5 percent to 80 percent. The preparation method comprises the following steps: the tungsten aluminum powder and the nickel powder serve as raw materials, and are sintered under vacuum condition and through hot pressing, to prepare an alloy sintered body sample with high compaction and excellent performance. An alloy lump-shaped material with good crystal morphology and microstructure is synthesized by changing the mass percentage of nickel and controlling sintering temperature, pressure, time and other conditions. The mechanical properties of the alloy are as follows: the hardness is 5.13Gpa to 8.03Gpa, the bending strength is 1430Mpa to 1900Mpa, and the relative compaction of the sintered body is above 99 percent.

Description

technical field [0001] The invention belongs to a tungsten-aluminum-nickel alloy sintered body and a preparation method thereof, and specifically relates to preparing a tungsten-aluminum-nickel alloy sintered body by using tungsten-aluminum powder as a raw material and nickel as a binding phase through vacuum sintering and hot-pressing sintering techniques. Background technique [0002] The main development direction of high-performance structural materials is to study new materials with high strength, high toughness, high hardness, light weight, high oxidation resistance and good processability. Tungsten-nickel alloy has superior high-temperature performance and mechanical properties, and is the most widely used high-temperature alloy at present. Therefore, it has been widely used in the field of modern science, defense industry and civilian industry. For example, it is used as gyro rotor and inertial rotating element in the aerospace industry; it is used as armor-piercing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C21/00C22C27/04C22C30/00C22C1/04B22F3/16
Inventor 马贤锋乔竹辉汤华国赵伟
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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