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A kind of nickel base superalloy and preparation method thereof

A technology for high-temperature alloys and metal products, which is applied in the field of high-temperature alloys and can solve problems such as fatigue strength, yield strength and ultimate tensile strength mechanical properties decline

Active Publication Date: 2018-05-08
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mechanical properties of nickel-based superalloys such as fatigue strength, yield strength and ultimate tensile strength will decrease significantly during high-temperature long-term service.

Method used

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  • A kind of nickel base superalloy and preparation method thereof
  • A kind of nickel base superalloy and preparation method thereof
  • A kind of nickel base superalloy and preparation method thereof

Examples

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Embodiment 1

[0205] The present invention has no special limitation on the sources of the raw materials used in the examples, they can be purchased from the market or prepared according to the preparation methods well known to those skilled in the art.

[0206] The present invention has no special restrictions on the preparation method of the high-stable powder metallurgy high-temperature nickel alloy described in the examples and the source of other raw materials, which can be prepared according to the preparation method known to those skilled in the art or purchased on the market.

[0207] The present invention prepares the powder metallurgy high-temperature nickel alloy CSU-A3 according to a certain alloy composition ratio, and compares the composition with the existing typical second-generation and third-generation powder metallurgy superalloys. The comparison results are shown in Table 1. 1 is the composition comparison between the superalloy obtained in Example 1 of the present invent...

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Abstract

The invention provides nickel-base superalloy and a preparation method thereof, and in particular relates to powder metallurgy nickel alloy with high stability, and articles made from the powder metallurgy nickel alloy. The nickel-base superalloy is prepared from the following components by mass percent: 18.5-19.5% of Co, 12.75-13.25% of Cr, 2.8-3.2% of Al, 3.5-3.9% of Ti, 3.75-4.25% of W, 3.75-4.25% of Mo, 0.9-1.1% of Ta, 1.1-1.3% of Nb, 0.17-0.23% of Hf, 0.04-0.06% of C, 0.003-0.015% of B, 0.03-0.07% of Zr and the balance of Ni. The superalloy designed by the invention has better structure stability and high-temperature strength, and the temperature tolerance of the alloy is further improved.

Description

technical field [0001] The invention relates to the technical field of superalloys, in particular to a nickel-based superalloy and a preparation method thereof. Background technique [0002] Generally speaking, superalloys refer to high-temperature metal materials that can work for a long time above 600 °C and under certain stress conditions. performance. With the rapid development of industry, superalloys have shown good application prospects in various fields, and are mainly used to manufacture high-temperature components such as turbine blades, guide vanes, turbine disks, high-pressure compressor disks, and combustion chambers of gas turbine engines. [0003] According to the preparation process, superalloy materials can be divided into deformed superalloys, cast superalloys and powder metallurgy superalloys. Superalloy materials can be divided into iron-based superalloys, nickel-based superalloys and cobalt-based superalloys according to matrix elements. Due to the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03
Inventor 不公告发明人
Owner CENT SOUTH UNIV
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