Method for improving room-temperature tensile property of Ti-48Al-2Cr-2Nb alloy through adding of nano Y2O3

A tensile property, nanotechnology, applied in the field of improving the room temperature tensile properties of Ti-48Al-2Cr-2Nb alloys, can solve the problems of coarse alloy structure and segregation, and achieve room temperature plastic improvement, increase the number of dislocations, and improve room temperature resistance. The effect of tensile strength

Inactive Publication Date: 2016-08-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of coarse structure and serious segregation of the existing directly cast Ti-48Al-2Cr-2Nb alloy, and to provide a 2 o 3 Method for Improving Tensile Properties of Ti-48Al-2Cr-2Nb Alloy at Room Temperature

Method used

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  • Method for improving room-temperature tensile property of Ti-48Al-2Cr-2Nb alloy through adding of nano Y2O3
  • Method for improving room-temperature tensile property of Ti-48Al-2Cr-2Nb alloy through adding of nano Y2O3
  • Method for improving room-temperature tensile property of Ti-48Al-2Cr-2Nb alloy through adding of nano Y2O3

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specific Embodiment approach 1

[0017] Specific implementation mode 1: In this implementation mode, a method by adding nano-Y 2 o 3 The method to improve the tensile properties of Ti-48Al-2Cr-2Nb alloy at room temperature is:

[0018] 2. First pump the air pressure in the furnace cavity of the water-cooled copper crucible induction shell melting furnace to 4Pa, then fill it with argon to 700-800Pa, and repeat the gas washing process twice; Alloys, pure titanium rods, pure aluminum ingots, pure Cr and nano Y with a diameter of 10-100nm and an atomic percentage of 0.025-0.1 2 o 3 Mix the particles evenly, put them into a water-cooled copper crucible induction shell melting furnace, turn on the circulating cooling water, and adjust the power to 20kw in an argon environment. After all the pure aluminum ingots are melted, increase the power to 40-50kw. After the pure titanium rod is melted, adjust the power to 80kw, keep it warm for 20 minutes, and then cast it to obtain nano-Y 2 o 3 Ti-48Al-2Cr-2Nb alloy, w...

specific Embodiment approach 2

[0020] Embodiment 2: This embodiment differs from Embodiment 1 in that: the pure titanium rod in step 2 refers to a titanium rod with a titanium mass percentage of 99.9%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the pure aluminum ingot in step 2 refers to an aluminum ingot with an aluminum mass percentage of 99.9%. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for improving the room-temperature tensile property of a Ti-48Al-2Cr-2Nb alloy through adding of nano Y2O3, and belongs to the field of room-temperature mechanical properties of metal materials. The method for improving the room-temperature tensile property of the Ti-48Al-2Cr-2Nb alloy through adding of the nano Y2O3 aims at solving the problem that an existing directly-casted Ti-48Al-2Cr-2Nb alloy is coarse in structure, and serious in segregation. The method comprises the steps that nano Y2O3 particles are added in the Ti-48Al-2Cr-2Nb alloy, a water cooled copper crucible is adopted to induce a solidification shell smelting furnace, and under the high-vacuum/argon environment, through the melt reaction, a full-lamellar structure with the fine Y2O3 particles evenly distributed in a dispersed manner is directly generated. After the nano Y2O3 is added, the room-temperature tensile strength of the alloy is obviously improved, and the room-temperature plasticity of the alloy is greatly improved.

Description

technical field [0001] The present invention relates to a kind of by adding nanometer Y 2 o 3 A method for improving the tensile properties of Ti-48Al-2Cr-2Nb alloy at room temperature. Background technique [0002] As people's requirements for energy conversion rate and environment are getting higher and higher, the service environment and performance indicators of materials are becoming more and more stringent, especially in the fields of aviation and automobiles. TiAl alloy has the advantages of high specific strength, high specific stiffness, oxidation resistance, high creep resistance, and good flame retardancy. It is expected to replace traditional nickel-based superalloys in the range of 600-800 degrees Celsius and become a new generation of aero-engine and automobile industries. Ideal replacement material for hot end components. [0003] The literature T.Novoselova, S.Malinov, W.Sha.ExperimentalstudyoftheeffectsofheattreatmentonmicrostructureandgrainsizeofagammaTi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C14/00
CPCC22C1/1036C22C14/00C22C32/0031C22C1/1047
Inventor 陈玉勇田竟张冬冬
Owner HARBIN INST OF TECH
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