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Silver powder-containing metallurgic titanium-molybdenum-aluminum-vanadium alloy and preparation method thereof

A powder metallurgy, aluminum vanadium technology, applied in the field of non-ferrous metal materials, can solve the problems of improving the sintering performance of powder metallurgy titanium-molybdenum-aluminum-vanadium alloy, unable to industrialize production, and high production cost, and achieves improvement of formability, density, and reduction. The effect of production

Inactive Publication Date: 2010-09-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional titanium alloy powder metallurgy technology has the main defect of low density
Although hot isostatic pressing green bodies and vacuum hot pressing sintering methods can obtain powder metallurgy titanium alloys with high density, hot isostatic pressing equipment with high additional pressure is required for hot isostatic pressing green bodies, and the process is more complex. It is complicated, so that the method has the disadvantage of high production cost, and cannot be industrialized
[0003] There is no public report on improving the sintering properties of powder metallurgy titanium molybdenum aluminum vanadium alloys by adding silver

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The powder metallurgy titanium alloy with the composition of Ti-5Mo-5Al-4V-2Ag was prepared. The raw materials used are 200 mesh titanium powder, 300 mesh aluminum powder, 200 mesh molybdenum powder, 150 mesh Al-58V master alloy powder and 200 mesh silver powder. The raw material powder is weighed according to the alloy ratio, and the raw material powder is ball milled and mixed evenly on a ball mill, and then molded into a green body under a pressure of 200MPa, and the green body is put into a vacuum sintering furnace for high-temperature sintering, and the vacuum degree is controlled at 1×10 -3 MPa, the sintering temperature is 1250°C, and the sintering time is 6h. The HV of the obtained powder metallurgy titanium alloy is 810MPa, and the density of the sintered body obtained by the drainage method is 96%.

Embodiment 2

[0030] The powder metallurgy titanium alloy with the composition of Ti-8Mo-7Al-6V-10Ag was prepared. The raw materials used are 300 mesh titanium powder, 200 mesh aluminum powder, 200 mesh molybdenum powder, 200 mesh Al-58V master alloy powder and 150 mesh silver powder. The raw material powder is weighed according to the alloy ratio, and the raw material powder is ball milled on a ball mill to mix evenly, and then molded into a green body under a pressure of 400MPa, and the green body is put into a vacuum sintering furnace for high-temperature sintering, and the vacuum degree is controlled at 1×10 -2 MPa, the sintering temperature is 1100°C, and the sintering time is 10h. The HV of the obtained powder metallurgy titanium alloy is 830MPa, and the compactness of the sintered body obtained by the drainage method is 95%.

Embodiment 3

[0032] A powder metallurgy titanium alloy whose composition is Ti-2Mo-3Al-2V-6Ag was prepared. The raw materials used are 150 mesh titanium powder, 150 mesh aluminum powder, 300 mesh molybdenum powder, 250 mesh Al-58V master alloy powder and 200 mesh silver powder. The raw material powder is weighed according to the alloy ratio, and the raw material powder is ball milled and mixed evenly on a ball mill, and then molded into a green body under a pressure of 300MPa, and the green body is put into a vacuum sintering furnace for high-temperature sintering, and the vacuum degree is controlled at 1×10 -1 MPa, the sintering temperature is 1400°C, and the sintering time is 2h. The HV of the obtained powder metallurgy titanium alloy is 780MPa, and the density of the sintered body obtained by the drainage method is 95%.

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Abstract

The invention provides a silver powder-containing metallurgic titanium-molybdenum-aluminum-vanadium alloy and a preparation method thereof. The alloy comprises the following components in percentage by weight: 2 to 8 percent of Mo, 3 to 7 percent of Al, 2 to 6 percent of V, 2 to 10 percent of Ag and the balance of titanium and inevitable impurities. The preparation method comprises the following steps of: according to the weight percentages of the components, weighing titanium powder, molybdenum powder, aluminum powder, silver powder and aluminum vanadium intermediate alloy powder with certain granularity; uniformly mixing the powder by adopting a mixing method; and pressing the powder to prepare a green body with certain shape through a compression molding process; putting the green body in a vacuum sintering furnace for sintering, and obtaining the argentiferous titanium-molybdenum-aluminum-vanadium alloy after the furnace is cooled. In the preparation method, the process flow is simple, the silver powder is added into mixture to improve the compactibility of the green body and further increase the density of a sintered body, and thus, the highly-densified silver powder-containing metallurgic titanium alloy is obtained. The preparation method is suitable for industrialized production.

Description

technical field [0001] The invention relates to a powder metallurgy titanium alloy, in particular to a silver-containing powder titanium-molybdenum-aluminum-vanadium alloy and a preparation method thereof. It belongs to the field of non-ferrous metal materials. Background technique [0002] Due to the advantages of low density, high specific strength, high yield ratio, good plasticity and toughness, and good corrosion resistance, titanium alloys have broad application prospects in military and civilian fields, and their performance and manufacturing technology directly affect these fields. development and improvement of the level. There are currently three main methods for manufacturing titanium alloy parts: 1) traditional forging material processing; 2) casting; 3) powder metallurgy. Forging is used for material processing, and its material performance is excellent, but it is wasteful, the processing volume is large, the cost is high, and it is difficult to obtain product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/04
Inventor 肖代红袁铁锤贺跃辉
Owner CENT SOUTH UNIV
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