GH4169 high-temperature alloy free-forged bar billet and preparation method thereof

A technology of GH4169 and superalloy, which is applied in the direction of metal processing equipment, etc., can solve the problems of poor composition uniformity of ingots and high equipment costs, and achieve the effect of small content of harmful impurity elements, uniform composition, and improved structure uniformity

Active Publication Date: 2019-11-15
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another object of the present invention is to provide a method for preparing a GH4169 superalloy free-forging billet, which solves the problems of high equipment cost and poor uniformity of ingot components required by existing processing methods

Method used

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  • GH4169 high-temperature alloy free-forged bar billet and preparation method thereof
  • GH4169 high-temperature alloy free-forged bar billet and preparation method thereof
  • GH4169 high-temperature alloy free-forged bar billet and preparation method thereof

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preparation example Construction

[0035] A kind of preparation method of GH4169 superalloy free-forging billet of the present invention, concrete operation process comprises the following steps:

[0036] Step 1, sequentially smelting GH4169 superalloy ingots through the triple smelting process of vacuum induction melting + electroslag remelting + vacuum consumable remelting to obtain GH4169 superalloy ingots with a diameter of 480 mm to 600 mm;

[0037] Step 2, the GH4169 superalloy ingot is heated in a natural gas furnace to a temperature of 1180°C to 1200°C for uniform treatment;

[0038] In step 2, the ingot high-temperature uniform treatment process is as follows:

[0039] First heat to 600°C-650°C, heat preservation coefficient is 0.6min / mm, then heat up to 1140°C-1160°C at a heating rate of 2°C-6°C / min, hold time ≥ 24h, then heat at 2°C-6°C / mm The heating rate of min is raised to 1180°C-1200°C, the holding time is ≥48h, and the furnace is cooled to 600°C-650°C at the end of the holding time, and then ai...

Embodiment 1

[0058] The diameter of the GH4169 alloy ingot smelted by vacuum induction melting + electroslag remelting + vacuum consumable remelting process is 490mm. The ingot homogenization process is as follows: heating to 650°C, holding for 300min, and then heating at a rate of 2°C / min Raise the temperature to 1150°C, hold for 24 hours, then raise the temperature to 1195°C at a heating rate of 6°C / min, hold for 48 hours, cool in the furnace to 650°C at the end of the hold, and then air cool;

[0059] Heat the GH4169 superalloy ingot cold material after the homogenization heat treatment to 650°C and keep it warm, then raise the temperature to 1100°C at a heating rate of 5°C / min and keep it warm. 1200→Φ600×800→Bafang 480×1180, the deformation of the first and second fires and single fires are 33% and 32% respectively. After completion, the hot material is quenched in water.

[0060] Heat the cold billet obtained after billet opening to 850°C and keep it warm, then raise the temperature ...

Embodiment 2

[0065] The diameter of the GH4169 alloy ingot smelted by vacuum induction melting + electroslag remelting + vacuum consumable remelting process is 530mm. 1160°C, holding time 28h, then heating up to 1190°C at a heating rate of 4°C / min, holding time 54h, furnace cooling to 630°C at the end of holding, then air cooling;

[0066] Heat the GH4169 superalloy ingot cold material after homogenization heat treatment to 630°C and keep it warm, then raise the temperature to 1090°C at a heating rate of 7°C / min and keep it warm, then open the billet, forging a total of 2 fires, and the deformation setting is as follows: Φ530× 1020→Φ660×655→Bafang 500×1080, the deformations of the 1st and 2nd single fires are 35% and 39% respectively. After completion, the hot material is quenched in water.

[0067] Heat the cold billet obtained after billet opening to 800°C and keep it warm, then raise the temperature to 1080°C at a heating rate of 7°C / min and then carry out 4 times of upsetting and draw...

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Abstract

The invention discloses a GH4169 high-temperature alloy free-forged bar billet. The GH4169 high-temperature alloy free-forged bar billet is characterized in that the specification is phi 250mm-350mm,the flaw detection level is not lower than phi 0.4dB-6dB, and the grain size is grade 8-9. The invention further discloses a preparation method of the bar billet. The preparation method comprises thefollowing steps that firstly, GH4169 high-temperature alloy cast ingots are smelted through a combined triple smelting process of vacuum induction smelting, electroslag remelting and vacuum self-consuming remelting, and high temperature homogenization treatment is carried out; secondly, upsetting, stretching, cogging and forging are carried out on the GH4169 high-temperature alloy cast ingots; then the billet materials obtained after cogging are deformed by upsetting and stretching, and the billet materials with the diameter of 400mm-500 mm are obtained; and finally, continuous remelting drawing forging is carried out on the billet materials obtained after upsetting and stretching at high-temperature to obtain the GH4169 high-temperature alloy free-forged bar billet with the diameter of 250mm-350mm. According to the preparation method , the grain size of the bar billet is controlled to be grade 8-9, the grain size grade difference from an edge part to a core part is controlled to be 1grade or within, and the structure uniformity of the large bar billet is improved.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal processing, and in particular relates to a GH4169 high-temperature alloy free-forging bar blank, and also relates to a preparation method of the bar blank. Background technique [0002] GH4169 alloy is an aging-strengthened nickel-based superalloy. The alloy has excellent comprehensive performance in the temperature range of -253°C to 700°C. The yield strength below 650°C ranks first among deformed superalloys, and it is resistant to oxidation and corrosion. With good performance, it has been widely used in the fields of aerospace, nuclear energy, petroleum industry and mold manufacturing. At present, the GH4169 alloy products that have been mass-produced include billets, slabs, forging billets, etc. Among them, free forging superalloy billets are the most used. [0003] Compared with other nickel-based superalloys, the Nb content in GH4169 alloy is more than 5%, and there are many stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00C22F1/10
CPCB21J5/002C22F1/10
Inventor 段军阳阚志史新波王凯旋齐锐何添翼刘飞付宝全刘向宏
Owner 西部超导材料科技股份有限公司
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