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Nickel-based alloy and preparation method thereof, and manufactured object

A technology of nickel-based alloys and articles, which is applied in mechanical equipment, engine components, machines/engines, etc., and can solve problems affecting the progress of alloy manufacturing processes, etc.

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

AI Technical Summary

Problems solved by technology

Although this high-temperature heat treatment can effectively eliminate microscopic segregation in nickel-based alloys, the complex and extremely high-temperature heat treatment system not only seriously affects the progress of the alloy manufacturing process, but also poses a severe test to the heat treatment equipment.

Method used

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  • Nickel-based alloy and preparation method thereof, and manufactured object
  • Nickel-based alloy and preparation method thereof, and manufactured object
  • Nickel-based alloy and preparation method thereof, and manufactured object

Examples

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preparation example Construction

[0085] The application also provides a method for preparing a nickel-based alloy, comprising the following steps:

[0086] A) preparing nickel-based master alloy ingot according to the composition ratio of the above-mentioned nickel-based alloy;

[0087] B) remelting the nickel-based master alloy ingot, and then preparing nickel-based alloy castings;

[0088] C) performing heat treatment on the nickel-based alloy casting to obtain a nickel-based alloy.

[0089] 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.

[0090] 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

[0101] The nickel-based alloy of the present application significantly reduces alloy segregation, and makes the volume fraction of the eutectic phase in the as-cast structure lower than 3.5%. comprehensive performance. In order to further illustrate the effect of the present application, the present application lists 6 specific examples and compares them with 5 existing alloys. 6 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 alloy is specifically:

[0102] 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;

[0103] 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 crystal casting by a spiral crysta...

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Abstract

The invention provides a nickel-based alloy and a preparation method thereof, and a manufactured object. The alloy comprises, by weight, 5.25-6.25% of aluminum, 5.0-7.0% of chromium, 5.5-7.0% of cobalt, 1.0-2.2% of molybdenum, 3.5-8.5% of tungsten, 0.5-1.5% of titanium, 5.5-8.0% of tantalum, 1.0-6.0% of rhenium, 0.0-0.25% of hafnium, 0.0-0.1% carbon, 0. 0-0.01% of boron and the balance being nickel. By reasonably configuring the total content of refractory elements such as Mo, W, Ta and Re, the alloy segregation is significantly reduced, and the volume fraction of a eutectic phase in the as-cast structure is less than 3.5%, thereby maintaining good microstructure stability of the alloy.

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), usually based on Fe, Co or Ni elements, and contain 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., are mainly used in the 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. , so it is more widely used in engine hot end parts. [0003] From the perspective of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22F1/10F01D5/28
CPCC22C19/007C22C19/057C22F1/002C22F1/10F01D5/28F05D2300/175
Inventor 不公告发明人
Owner CENT SOUTH UNIV
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