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Powder metallurgy preparation method for rare-earth containing oxide reinforcing phase titanium alloy

A technology of rare earth oxide and phase titanium alloy, which is applied in the field of titanium alloy processing, can solve problems such as storage and transportation difficulties, and achieve the effects of favorable shape and distribution, high room temperature stability, and low raw material cost

Inactive Publication Date: 2010-04-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Rare earth elements are very active elements, and the preparation, storage and transportation of their powders are very difficult. At present, there is no suitable way to add rare earth elements to powder metallurgy titanium alloys
At the same time, there is no report on the process of controlling the formation of rare earth oxides in powder metallurgy titanium alloys.

Method used

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  • Powder metallurgy preparation method for rare-earth containing oxide reinforcing phase titanium alloy
  • Powder metallurgy preparation method for rare-earth containing oxide reinforcing phase titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh Fe: 1.5%, Mo: 2.25%, YH 2 Powder (100 mesh): 0.1%, the rest is hydrogenated dehydrogenation titanium powder, the above powder is fully mixed and pressed into shape, and then the compact is put into a vacuum sintering furnace and sintered at 1300 ° C / 1.5 hours to make a titanium alloy sintered compact . Then the sintered green body was rolled and deformed at 1200°C / 90% high temperature, and its mechanical properties were tested.

Embodiment 2

[0021] Weigh Fe: 1.5%, Mo: 2.25%, YH 2 (100 mesh): 0.6%, the balance is hydrogenated dehydrogenated titanium powder, the above powders are fully mixed and pressed into shape, and then the pressed compact is put into a vacuum sintering furnace and sintered at 1300°C / 1.5 hours to form a titanium alloy sintered compact. Then the sintered green body was forged and deformed at a high temperature of 900°C / 50%, and its mechanical properties were tested.

Embodiment 3

[0023] Weigh Fe: 1.5%, Mo: 2.25%, YH 2 (250 mesh): 1.5%, the balance is hydrogenated dehydrogenated titanium powder, the above powders are fully mixed and pressed into shape, and then the compact is put into a vacuum sintering furnace and sintered at 1300°C / 1.5 hours to form a titanium alloy sintered compact. Then the sintered body was forged and deformed at a high temperature of 1000°C / 50%, and its mechanical properties were tested.

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Abstract

The invention discloses a powder metallurgy method for obtaining a dispersive rare-earth oxide reinforcing phase from titanium alloy, which comprises the following steps: adding rare-earth elements in a form of rare-earth hydride powder, fully mixing the rare-earth hydride powder, hydrogenated and dehydrogenated titanium powder and other necessary alloy powder or alloy element powder, performing cold isopressing molding or compression molding, then sintering a pressed blank in vacuum at the high temperature, and finally performing high-temperature deformation on the sintered titanium alloy, wherein the deformation mode can be forging, rolling, extruding and the like. The method of the invention simplifies the production processes, can obtain the ideal rare-earth oxide reinforcing phase, and improves the comprehensive mechanical property of the titanium alloy.

Description

technical field [0001] The invention relates to a method for adding rare earth elements to titanium alloys, an elemental powder metallurgy method for titanium alloys containing rare earth elements, in particular to a process for controlling the formation of yttrium oxide and lanthanum oxide in elemental powder metallurgy titanium alloys, belonging to Titanium alloy processing technology field. Background technique [0002] Titanium alloy has the advantages of high specific strength, strong corrosion resistance, and excellent high-temperature performance. It is an important material used in the fields of aviation, aerospace, weapons, and automobile industries. Improving the strength, creep resistance, plasticity and oxidation resistance of titanium alloys will help to further expand the application fields of titanium alloys. The fine rare earth oxide particles dispersed in the matrix can effectively improve the above properties of the titanium alloy. At present, the main me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C14/00C22F1/18
Inventor 刘咏刘延斌汤慧萍邱敬文王斌王玉林
Owner CENT SOUTH UNIV
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