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Technological method of reducing number of metallurgical defects of GH4169 nickel base alloy ingot

A GH4169, nickel-based alloy technology, applied in metal processing equipment and other directions, can solve problems such as metallurgical defects and affect product quality, and achieve the effect of reducing defects, improving alloy purity, and reducing metallurgical defects

Active Publication Date: 2019-11-22
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, almost without exception, nickel-based superalloys are smelted once by vacuum induction melting, and then smelted for the second time, or even smelted for the third time; Vacuum induction melting VIM + protective atmosphere electroslag remelting ESR) is developing to triple process (vacuum induction melting VIM + protective atmosphere electroslag remelting ESR + vacuum self-consumption remelting VAR), the macroscopic and microscopic segregation control of alloy ingots is improved, and the composition uniformity is improved. However, due to the defects of chemical composition segregation and core metallurgy in the alloy ingot obtained by vacuum induction melting VIM or vacuum induction melting VIM+protective atmosphere electroslag remelting ESR, the large ingot type alloy ingot after vacuum self-consumption refraction Metallurgical defects occur from time to time after melting VAR, seriously affecting product quality

Method used

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  • Technological method of reducing number of metallurgical defects of GH4169 nickel base alloy ingot
  • Technological method of reducing number of metallurgical defects of GH4169 nickel base alloy ingot
  • Technological method of reducing number of metallurgical defects of GH4169 nickel base alloy ingot

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Embodiment 1

[0025] This embodiment uses the manufacturing method of the present invention for reducing metallurgical defects of GH4169 nickel-based alloy ingots to produce GH4169 alloy ingots with a specification of φ406mm through the steps of vacuum induction melting, homogenization treatment, rapid forging and upsetting, and vacuum consumable remelting.

[0026] Step A VIM smelting: use vacuum induction melting (VIM) to melt various raw materials into GH4169 alloys whose chemical composition and non-metallic inclusions meet the requirements, and vacuum cast them into alloy ingots with a diameter of φ360mm; step B homogenization treatment: the step The obtained alloy ingot with a diameter of φ360mm is subjected to homogenization treatment, the homogenization temperature is 20°C below the initial melting point temperature of the GH4169 nickel-based alloy, and the homogenization time is 25h. Step C quick forging and upsetting: Use a 4500t press to perform one-time upsetting and elongation o...

Embodiment 2

[0030] This embodiment uses the manufacturing method for reducing metallurgical defects of GH4169 nickel-based alloy ingots of the present invention to produce GH4169 alloy ingots with a specification of φ508mm through the steps of vacuum induction melting, homogenization treatment, rapid forging and upsetting, and vacuum consumable remelting.

[0031]Step A VIM smelting: use vacuum induction melting (VIM) to melt various raw materials into GH4169 alloys whose chemical composition and non-metallic inclusions meet the requirements, and vacuum cast them into alloy ingots with a diameter of φ450mm; step B homogenization treatment: the step The alloy ingot with a diameter of φ450mm obtained in A is subjected to homogenization treatment, the homogenization temperature is 10°C below the initial melting point temperature of the GH4169 nickel-based alloy, and the homogenization time is 35h. Step C quick forging and upsetting: Use a 4500t press to perform one-shot upsetting and elongati...

Embodiment 3

[0035] This embodiment uses the manufacturing method of the present invention for reducing metallurgical defects of GH4169 nickel-based alloy ingots to produce GH4169 alloy ingots with a specification of φ508mm through the steps of vacuum induction melting, homogenization treatment, rapid forging and upsetting, and vacuum consumable remelting.

[0036] Step A VIM smelting: use vacuum induction melting (VIM) to melt various raw materials into GH4169 alloys whose chemical composition and non-metallic inclusions meet the requirements, and vacuum cast them into alloy ingots with a diameter of φ450mm; step B homogenization treatment: the step The alloy ingot with a diameter of φ450mm obtained in A is subjected to homogenization treatment, the homogenization temperature is 20°C below the initial melting point temperature of the GH4169 nickel-based alloy, and the homogenization time is 40h. Step C quick forging and upsetting: Use a 4500t press to perform one-shot upsetting and elongat...

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Abstract

The invention discloses a technological method, particularly discloses a technological method of reducing the number of metallurgical defects of a GH4169 nickel base alloy ingot, belongs to the technical field of nickel base alloy remelting production technologies, and provides the technological method of reducing the number of the metallurgical defects of the GH4169 nickel base alloy ingot. The quality defects of a finished product of the technological method are few. According to the technological method, the GH4169 nickel base alloy molten ingot which is obtained through vacuum induction melting serves as a basic ingot, and the purpose that the number of the metallurgical defects of the GH4169 nickel base alloy ingot is reduced is achieved through one-time homogenization treatment, one-time high-speed forging, upsetting and pulling operation and one-time remelting operation.

Description

technical field [0001] The invention relates to a process method, in particular to a process method for reducing metallurgical defects of GH4169 nickel-based alloy ingots, and belongs to the technical field of nickel-based alloy remelting production process. Background technique [0002] Due to their comprehensive properties such as high high-temperature strength, good oxidation resistance and thermal corrosion resistance, superalloys are used for more than 50% of the mass of modern aviation gas turbine engines. Among them, the amount of nickel-based superalloys accounts for about 40% of the engine materials, and GH4169 is 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 placed on the thermal corrosion resistance, high-temperature strength, cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C1/02C22F1/10B21J5/08B21J5/06
CPCB21J5/06B21J5/08C22C1/023C22C19/03C22F1/10
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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