Vacuum consumable remelting method of deformed high-temperature alloy GH4169

A vacuum self-consumption remelting, GH4169 technology, applied in the field of high-quality deformed superalloy preparation for aero-engines, can solve the problems of large fluctuations in mechanical properties, poor structure uniformity of deformed superalloys, etc., and achieve high welding quality and heat-affected zone Small, the effect of improving process stability

Active Publication Date: 2020-07-10
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 high-quality deformed high-temperature alloy preparation for aero engines, and relates to a vacuum consumable remelting method of a deformed high-temperature alloy GH4169. The vacuum consumable remelting method specifically comprises the steps of preparing consumable electrodes by electroslag remelting, electrode ingot high-temperature stress reliefannealing, machining, electrode welding, centering charging, three-stage control consumable remelting and the like. The vacuum consumable remelting method has the outstanding advantages that the riskof segregation metallurgical defects generated in the process of high-niobium deformed high-temperature alloy vacuum consumable remelting can be reduced, and meanwhile, the batch stability and usage reliability of prepared deformed high-temperature alloy materials are improved.

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 Applications(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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