Manufacturing method for low metallurgical defect gh4169 nickel base alloy ingot

A GH4169, nickel-based alloy technology, applied in the direction of improving process efficiency and energy efficiency, can solve problems such as metallurgical defects and affect product quality, and achieve the effects of improving alloy purity, eliminating central defects, and reducing metallurgical defects

Active Publication Date: 2021-06-04
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, almost without exception, GH4169 nickel-based superalloys are smelted once by vacuum induction melting method, and then smelted twice or even smelted three times; With the development of technology (VIM+ESR+VAR), the macro and micro segregation control of alloy ingots has been improved, and the composition uniformity has been greatly improved; however, compared with foreign nickel-based superalloys, metallurgical defects of large ingot alloy ingots occur from time to time, seriously affecting product quality

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  • Manufacturing method for low metallurgical defect gh4169 nickel base alloy ingot
  • Manufacturing method for low metallurgical defect gh4169 nickel base alloy ingot
  • Manufacturing method for low metallurgical defect gh4169 nickel base alloy ingot

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Embodiment 1

[0030] This embodiment uses the manufacturing method of the high-quality GH4169 nickel-based alloy ingot with low metallurgical defects of the present invention, through the steps of vacuum induction melting, protective atmosphere electroslag remelting, homogenization treatment, rapid forging and elongation and vacuum self-consumption remelting, Production of GH4169 alloy ingots with a φ406mm specification.

[0031]Step A VIM smelting: Vacuum induction melting (VIM) is used to precisely control the chemical composition of GH4169 nickel-based alloy. When the content of [S] in the alloy is 5PPm, the content of [O] is 5PPm, and the content of [N] is 25PPm, the steel is tapped and vacuum cast into a diameter of φ360mm. The nickel-based alloy ingot; step B protective atmosphere electroslag remelting: the high-purity GH4169 nickel-based alloy ingot with a diameter of φ360mm obtained in step A is subjected to protective atmosphere electroslag remelting, and the melting rate is control...

Embodiment 2

[0035] This embodiment uses the manufacturing method of the high-quality GH4169 nickel-based alloy ingot with low metallurgical defects of the present invention, through the steps of vacuum induction melting, protective atmosphere electroslag remelting, homogenization treatment, rapid forging and elongation and vacuum self-consumption remelting, Production of GH4169 alloy ingots with φ508mm specification.

[0036] Step A VIM smelting: Vacuum induction melting (VIM) is used to precisely control the chemical composition of GH4169 nickel-based alloy. The [S] content in the alloy is 4PPm, the [O] content is 7PPm, and the [N] content is 18PPm. The steel is tapped and vacuum cast into a diameter of φ450mm. The nickel-based alloy ingot; step B protective atmosphere electroslag remelting: the high-purity GH4169 nickel-based alloy ingot with a diameter of φ450mm obtained in step A is subjected to protective atmosphere electroslag remelting, and the melting rate is controlled at 5kg / min ...

Embodiment 3

[0040] This embodiment uses the manufacturing method of the high-quality GH4169 nickel-based alloy ingot with low metallurgical defects of the present invention, through the steps of vacuum induction melting, protective atmosphere electroslag remelting, homogenization treatment, rapid forging and elongation and vacuum self-consumption remelting, Production of GH4169 alloy ingots with φ508mm specification.

[0041] Step A VIM smelting: Vacuum induction melting (VIM) is used to precisely control the chemical composition of GH4169 nickel-based alloy. When the content of [S] in the alloy is 3PPm, the content of [O] is 5PPm, and the content of [N] is 22PPm, the steel is tapped and vacuum cast into a diameter of φ450mm. The nickel-based alloy ingot; step B protective atmosphere electroslag remelting: the high-purity GH4169 nickel-based alloy ingot with a diameter of φ450mm obtained in step A is subjected to protective atmosphere electroslag remelting, and the melting rate is controll...

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Abstract

The invention discloses a manufacturing method, in particular discloses a manufacturing method for a GH4169 nickel-based alloy ingot with low metallurgical defects, and belongs to the technical field of nickel-based alloy remelting production technology. Provided is a method for manufacturing a GH4169 nickel-based alloy ingot with low metallurgical defects, which can significantly reduce the metallurgical defects of the GH4169 nickel-based alloy ingot. The manufacturing method uses the GH4169 nickel-based alloy ingot obtained by vacuum induction melting as the base ingot, and obtains the GH4169 nickel-based alloy ingot with low metallurgical defects through two remelting, one homogenization treatment and one rapid forging and drawing, wherein, The sequence of the homogenization treatment and the rapid forging and drawing process is arranged between two remelting processes.

Description

technical field [0001] The invention relates to a manufacturing method, in particular to a manufacturing method for a GH4169 nickel-based alloy ingot with low metallurgical defects, and belongs to the technical field of nickel-based alloy remelting production technology. Background technique [0002] Superalloys have comprehensive properties such as high high-temperature strength, good oxidation resistance and thermal corrosion resistance, so more than 50% of the materials of modern aviation gas turbine engines are made of superalloys. Among them, the amount of nickel-based superalloys accounts for about 40% of engine materials, of which GH4169 nickel-based alloys are widely used in the preparation of important metal materials for aerospace engines and high-performance parts of gas turbines. As the thrust and thrust-to-weight ratio of aero-engines continue to increase and the turbine inlet temperature continues to increase, higher requirements are put forward for the thermal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/10C22C1/02C22C1/06C22B9/18C22C19/03
CPCC22B9/18C22C1/023C22C1/06C22C19/03C22F1/10Y02P10/25
Inventor 蒋世川张健周扬赖宇
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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