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High temperature alloy material of Ni3AL based monocrystalline containing molybdenum, and praparation method

A high-temperature alloy and base single crystal technology, applied in the field of high-temperature alloy materials, can solve the problems of high density, unfavorable wide application of aero-engines, and increased alloy manufacturing costs, etc., to meet low density, good high-temperature durable strength and plasticity, and reduce manufacturing costs. cost effect

Inactive Publication Date: 2007-02-21
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, high-melting point metals such as tungsten W, rhenium Re, ruthenium Ru and tantalum Ta are added to the superalloy materials used in high-performance gas turbine engines to varying degrees to make them denser. At the same time, Re, Ta and Ru, etc. It is a precious metal, which also increases the cost of alloy manufacturing, which is not conducive to the wide application of aero-engines

Method used

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  • High temperature alloy material of Ni3AL based monocrystalline containing molybdenum, and praparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Preparation of Ni-7.6wt%Al-14wt%Mo single crystal superalloy

[0038] A: Bars made by smelting:

[0039] The first step, take Ni, Al, Mo elemental material by weight,

[0040] First put Ni and Mo directly into the IS65V8 vacuum induction furnace, and then add Al during the alloying period;

[0041] The second step is to pump the vacuum of the induction furnace to below 0.75Pa;

[0042] The third step is to adjust the melting temperature to 1500°C, after 25 minutes of melting time;

[0043] Then, heat the temperature in the furnace to 1558°C and keep it warm for 4 minutes;

[0044] Then, turn off the power and cool down to 1500°C, and cast alloy rods with electricity;

[0045] The alloy bar is taken out after cooling with the furnace for 12min;

[0046] B: Single crystal superalloy material

[0047] The fourth step is to put the alloy rod prepared in the third step above into the alumina crucible in the ISP05DS / SC directional single crystal growth furnac...

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PUM

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Abstract

This invention discloses a Mo-containing Ni3Al-based single crystal high-temperature alloy material, which is composed of: Ni 7.3-8.5 wt.5, Al 13.5-15 wt. % and Mo. The Mo-containing Ni3Al-based single crystal high-temperature alloy material has a density of 7.8-7.9 g / cm3, which can satisfy the requirements of low density and high push weight ratio of aviation gas turbine engines. The alloy material also has excellent high-temperature strength and plasticity and high stress conditions, and the high-temperature tolerance can reach 239.35 h at 1100 deg.C under 130 MPa.

Description

technical field [0001] The present invention relates to a kind of superalloy material, more particularly, refers to a kind of Ni containing molybdenum 3 Al-based single crystal superalloy material and preparation method thereof. Background technique [0002] Ni 3 Al is an intermetallic compound, which has a series of advantages as a high-temperature material, such as good ductility, high-temperature strength, and good oxidation resistance. [0003] Mo is used as a solid solution strengthening element in superalloys. Mo is not only an effective strengthening element for the γ phase, but also an important alloying element for strengthening the γ′ phase. Compared with other refractory elements such as W, Ta, Nb and Hf, Mo has higher solid solubility in both γ phase and γ′ phase. [0004] At present, high-melting point metals such as tungsten W, rhenium Re, ruthenium Ru and tantalum Ta are added to the superalloy materials used in high-performance gas turbine engines to vary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C1/03B22D21/00
Inventor 李树索韩雅芳孔志刚
Owner BEIHANG UNIV
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