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Nickel base alloy, preparation method of nickel base alloy and manufactured goods

A technology for nickel-based alloys and articles, applied in mechanical equipment, engine components, machines/engines, etc., and can solve problems such as low high temperature creep strength

Inactive Publication Date: 2019-04-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, although the existing nickel-based single crystal superalloys AM3, CMSX-2 and RenéN4 do not contain Re, their high-temperature creep strength is significantly lower than that of CMSX-4 and RenéN5 alloys containing 3wt% Re

Method used

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  • Nickel base alloy, preparation method of nickel base alloy and manufactured goods
  • Nickel base alloy, preparation method of nickel base alloy and manufactured goods
  • Nickel base alloy, preparation method of nickel base alloy and manufactured goods

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preparation example Construction

[0076] The application also provides a method for preparing a nickel-based alloy, comprising the following steps:

[0077] A) preparing nickel-based master alloy ingot according to the composition ratio of the above-mentioned nickel-based alloy;

[0078] B) remelting the nickel-based master alloy ingot, and then preparing nickel-based alloy castings;

[0079] C) performing heat treatment on the nickel-based alloy casting to obtain a nickel-based alloy.

[0080] In the above nickel-based alloy preparation method, the specific composition of the nickel-based master alloy ingot has been described in detail above, and will not be repeated here.

[0081] In the above-mentioned process of preparing nickel-based alloys, the method for preparing nickel-based master alloy ingots is carried out according to methods well known to those skilled in the art. For example, the present application puts the raw materials into a vacuum melting furnace for melting according to the composition ra...

Embodiment

[0092] The nickel-based high-temperature alloy of the present application achieves a good balance in terms of alloy density, alloy cost, structure stability, high-temperature strength, etc., and has excellent comprehensive performance. In order to further illustrate the effect of the present application, the present application lists 7 specific examples, and compares 6 of them with 5 existing alloys. 7 embodiment alloy composition and 5 kinds of existing alloy composition are as shown in table 1; In embodiment, the preparation method of described nickel-based superalloy is specifically:

[0093] 1) put the raw materials according to the composition ratio shown in Table 1 into a vacuum induction melting furnace to melt the alloy, and prepare a master alloy ingot;

[0094] 2) Remelting the master alloy ingot in a vacuum device, and then preparing a columnar crystal casting by directional solidification in a mold shell formed by a refractory material, or preparing a single crysta...

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Abstract

The invention provides a nickel base alloy, a preparation method of the nickel base alloy and manufactured goods. The nickel base alloy is prepared from the following elements in percentage by weight:5.25%-6.5% of aluminum, 5.0%-8.0% of chromium, 6.0%-8.0% of cobalt, 0.5%-2.5% of molybdenum, 7.0%-10.0% of tungsten, 0.0%-1.0% of titanium, 5.0%-8.0% of tantalum, 0.0%-0.25% of hafnium, 0.0%-0.05% ofcarbon, 0.0%-0.01% of boron, and the balance of nickel. According to the nickel base alloy, the preparation method of nickel base alloy and the manufactured goods, by adding the elements and adjusting the content of the elements, the obtained nickel base alloy realizes good balance in aspects such as alloy density, alloy cost, structure stability and high-temperature strength, and has excellent comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of nickel-based alloys, in particular to a nickel-based alloy, its preparation method and manufactured articles. Background technique [0002] Superalloys are a class of alloys developed for service in high-temperature environments (above 650°C); this type of alloy is usually based on Fe, Co or Ni elements, and a large number of main alloying elements Cr, Al, Ti, Ta, Nb, Mo, W or Re etc. and trace elements C, B, Zr or Hf etc. Superalloys are mainly used in hot end parts of gas turbine engines (including aviation turbine engines and ground gas turbine engines), rocket propulsion and nuclear reactors. Compared with iron-based (iron-nickel-based) superalloys and cobalt-based superalloys, nickel-based superalloys have better oxidation resistance, face-centered cubic crystal structure with both strength and toughness, and higher phase stability. etc., so it is more widely used in engine hot end parts. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22F1/10F01D5/28C22C1/03
CPCC22C1/023C22C1/03C22C19/057C22F1/10F01D5/28F05D2300/175
Inventor 不公告发明人
Owner CENT SOUTH UNIV
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