A vacuum consumable remelting method for deformed superalloy gh4169

A technology of vacuum consumable remelting and GH4169, which is applied in the field of preparation of high-quality deformed superalloys for aero-engines, can solve the problems of poor microstructure uniformity and large fluctuations in mechanical properties of deformed superalloys, achieve high welding quality, and improve process stability Sex, the effect of small heat-affected zone

Active Publication Date: 2021-08-03
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems of poor microstructure uniformity and large fluctuations in mechanical properties of high-quality deformed superalloys used in the field of aero-engines, the present invention proposes a vacuum self-consumption remelting process for deformed superalloys, which helps to improve the quality of deformed superalloys Level and performance stability to meet the needs of aero engines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: GH4169 alloy vacuum self-consumable remelting electrode ingots were prepared by using the electroslag remelting process in an argon protective atmosphere, and the electrode ingots were placed in a trolley-type heat treatment furnace at room temperature for high-temperature stress relief annealing. The GH4169 ingot was heated slowly from room temperature (3°C / min) to 600°C and kept for 1 hour; the temperature was continuously raised to 950°C and held for 2 hours. Then the power is cut off, and the ingot is cooled to room temperature with the furnace; the head and tail of the electrode ingot after annealing are cut off with a sawing machine, and the thickness of the cut is 80mm. The surface layer of the ingot is machined by a lathe, and the removal amount of unilateral machining is 5mm. It is required that the surface of the processed electrode ingot should be free from cracks, pits, protrusions, inclusions, etc. visually. The flatness of the entire consumable...

Embodiment 2

[0042] Example 2: GH4169 alloy vacuum self-consumable remelting electrode ingot was prepared by electroslag remelting process in argon protective atmosphere, and the electrode ingot was placed in a trolley-type heat treatment furnace at room temperature for high-temperature stress relief annealing. The GH4169 ingot is heated slowly from room temperature (5°C / min) to 620°C for 2 hours; continue to heat up to 950°C for 3 hours. Then the power is cut off, and the ingot is cooled to room temperature with the furnace; the head and tail of the electrode ingot after annealing are cut off with a sawing machine, and the thickness of the cut is 100mm. The surface layer of the ingot is machined by lathe, and the removal amount of unilateral machining is 6mm. It is required that the surface of the processed electrode ingot should be free from cracks, pits, protrusions, inclusions, etc. visually. The flatness of the entire consumable electrode is required to be 3mm / m, and the out-of-round...

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Abstract

The invention belongs to the technical field of preparation of high-quality deformed superalloys for aero-engines. It relates to a vacuum consumable remelting method for deformed superalloy GH4169, specifically including electroslag remelting to prepare consumable electrodes, high-temperature stress relief annealing of electrode ingots, machining, electrode welding, centering furnace, and three-stage control of consumables Remelting and other processes. The outstanding advantage of this process is that it can reduce the risk of segregation-like metallurgical defects in the vacuum consumable remelting process of high-niobium deformed superalloys, and at the same time improve the batch stability and reliability of the prepared deformed superalloy materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of high-quality deformed superalloys for aero-engines. The invention relates to a vacuum consumable remelting method for deformed superalloy GH4169, which mainly includes annealing for stress relief of electrode ingots, melting speed control, helium cooling and the like. Background technique [0002] The background technology of this project is vacuum consumable remelting technology of deformed superalloy for aero-engine. [0003] The deformed superalloy GH4169 is widely used in aeroengines as discs, rings, fasteners, sheet metal parts and other parts. With the advancement and development of aviation technology, the requirements for service temperature and mechanical properties of deformed superalloy materials are getting higher and higher, and adding strengthening elements is an important method to ensure material performance and reliability. In the development process of superalloys, niobi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/16C22B9/18C22F1/10C22C1/02C22C19/05
CPCC22B9/16C22B9/18C22C1/023C22C19/055C22F1/10
Inventor 张勇韦康贾崇林王涛李钊
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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