Preparation method of powder metallurgy titanium alloy

A technology of powder metallurgy and titanium alloy, which is applied in the alloy field, can solve the problems of poor ductility and difficult sintering of titanium alloy powder, and achieve the effects of improving sintering performance, density and mechanical properties

Active Publication Date: 2020-02-14
SUZHOU ZHONGYAO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main technical problem to be solved by the present invention is to provide a powder metallurgy titanium alloy preparation method for the current problems of poor ductility and difficult sintering of titanium alloy powder

Method used

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  • Preparation method of powder metallurgy titanium alloy

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preparation example Construction

[0027] A preparation method of a powder metallurgy titanium alloy, the preparation method comprising the steps of:

[0028] (1) In parts by weight, take 200-230 parts of titanium powder, 20-22 parts of aluminum powder, 13-16 parts of molybdenum powder, 11-14 parts of mixed powder, 3-8 parts of additives, and 2-5 parts of auxiliary agents , 4 parts of auxiliary agent, 1 to 3 parts of binder, first put titanium powder, aluminum powder, molybdenum powder and binder into the ball mill for 2 hours at 800r / min, and collect the ball mill;

[0029] (2) Put the ball mill, mixed powder, auxiliary agent, additive and auxiliary agent into the extruder to extrude at 15MPa, dry, pulverize, pass through a 200 mesh sieve, collect the sieved particles, and pack the sieved particles into the cold Isostatic pressure sleeve, cold isostatic pressure treatment, the height-to-diameter ratio of the cold isostatic pressure sleeve is controlled at 3:12~18:4, the pressure during cold isostatic pressure ...

Embodiment 1

[0033] The mixed powder is formed by mixing boron oxide, rare earth elements and sodium cobaltate at a mass ratio of 11:1 to 3:0.2.

[0034] The rare earth element is any one of lanthanum hexaboride powder and yttrium oxide.

[0035] The additive is any one of feldspar and fluorite.

[0036] The adhesive is any one of polyurethane adhesive and acrylate adhesive.

[0037] The auxiliary agent is polyethylene glycol.

[0038] Auxiliary agent is any one in lithium carbonate, lithium chloride.

[0039] A preparation method of a powder metallurgy titanium alloy, the preparation method comprising the steps of:

[0040] (1) In parts by weight, 200-230 parts of titanium powder, 20-22 parts of aluminum powder, 13-16 parts of molybdenum powder, 11-14 parts of mixed powder, 3-8 parts of additive, 4 parts of auxiliary agent, 2 ~5 parts of additives, 1~3 parts of binder, first put titanium powder, aluminum powder, molybdenum powder and binder into the ball mill for 2 hours at 800r / min, ...

Embodiment 2

[0045] The mixed powder is formed by mixing boron oxide, rare earth elements and sodium cobaltate at a mass ratio of 11:1 to 3:0.2.

[0046] The rare earth element is any one of lanthanum hexaboride powder and yttrium oxide.

[0047] The additive is any one of feldspar and fluorite.

[0048] The adhesive is any one of polyurethane adhesive and acrylate adhesive.

[0049] The auxiliary agent is polyethylene glycol.

[0050] Auxiliary agent is any one in lithium carbonate, lithium chloride.

[0051] A preparation method of a powder metallurgy titanium alloy, the preparation method comprising the steps of:

[0052] (1) In parts by weight, 200-230 parts of titanium powder, 20-22 parts of aluminum powder, 13-16 parts of molybdenum powder, 11-14 parts of mixed powder, 3-8 parts of additive, 4 parts of auxiliary agent, 2 ~5 parts of additives, 1~3 parts of binder, first put titanium powder, aluminum powder, molybdenum powder and binder into the ball mill for 2 hours at 800r / min, an...

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Abstract

The invention relates to a preparation method of a powder metallurgy titanium alloy, and belongs to the technical field of alloys. According to the method, the sintering formability of a blank is improved through addition of an additive formed through mixing of feldspar and fluorite, the vacuum hot-pressing sintering method is adopted further, then the density of the sintered titanium alloy is increased, and the number of holes in the sintered titanium alloy is reduced; meanwhile, sintering in the nitrogen protection manner is adopted, nitrogen can react with partial metal elements, nitride metal is formed, and deposition is performed on the surface; at the same time, according to the method, an aid is added, the sintering performance can be further improved by the aid, and partial impurities can be removed; besides, mixed powder formed through mixing of boron oxide, rare-earth elements and sodium cobaltate is added, the beta-Ti phase and the alpha-Ti phase are refined by boron elements and the rare-earth elements during sintering, and alpha-Ti is remarkably transformed from sheets to the form similar to equiaxed grains, so that the method is beneficial to the ductility.

Description

technical field [0001] The invention relates to a method for preparing a powder metallurgy titanium alloy, which belongs to the technical field of alloys. Background technique [0002] Titanium alloys are advanced structural materials that possess a range of desirable properties that are not readily achievable for any other material. These desirable properties include excellent corrosion resistance to seawater environments, high specific strength and fracture toughness, good compatibility with composite materials, long-term durability with little maintenance, excellent biocompatibility, etc. However, such alloys may have very low yields due to the production difficulties involved in traditional ingot-based metallurgy-based methods. Powder metallurgy overcomes many of these disadvantages by requiring only a few finishing steps to produce parts. [0003] Among the many powder metallurgy methods, conventional pressing and sintering or cold compression molding and sintering po...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/05C22C1/10B22F1/00B22F3/04B22F3/10C22F1/18
CPCB22F1/0003B22F3/04B22F3/1007B22F2999/00C22C1/051C22C14/00C22F1/183B22F2201/02
Inventor 张威劲
Owner SUZHOU ZHONGYAO TECH CO LTD
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