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Forging and heat treatment process of a 750℃ superalloy forging

A high-temperature alloy and forging heating technology, which is applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the complex alloying ratio and high alloying, forming and heat treatment process difficulties, and cannot meet the high-temperature components of the new generation of aero-engines Requirements and other issues to achieve the effect of improving product performance, overcoming cracking sensitivity problems, and solving severe cracking

Active Publication Date: 2020-06-16
WUXI PAIKE HEAVY CASTING & FORGING
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Problems solved by technology

[0004] The operating temperature of existing high-temperature alloys is mostly 600-700 °C, which cannot meet the requirements of high-temperature components of the new generation of aero-engines
The existing 750°C superalloy forgings, due to its complex alloying ratio and high alloying, have caused great difficulty in forming and heat treatment processes

Method used

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  • Forging and heat treatment process of a 750℃ superalloy forging

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Experimental program
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Effect test

Embodiment

[0051] Embodiment comprises the following steps:

[0052] (1) Cutting: The blank used is a high-temperature alloy rod. The billet aspect ratio is 2.

[0053] (2) Forging heating: heating the blank into the furnace. The temperature of the billet entering the furnace is 750°C. The billet is heated to 1000°C for soaking. After soaking, apply a high-temperature coating on the surface of the billet and keep it warm for 135 minutes.

[0054] (3) Billet making: Preheat the billet tooling to 330°C before billet making. Re-forging is carried out through a low-temperature large-deformation forging process, and the forging deformation is 70%. After reforging, the billet is upset, rolled and punched.

[0055] Afterwards, the blank is processed into a ring-shaped forging, and the processing of the ring-shaped forging of the blank specifically includes the following steps (4) to (9):

[0056](4) Machining the inner hole: After the punched blank is air-cooled to room temperature, the ...

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Abstract

The invention relates to a forging and heat treatment process of a 750 DEG C-grade high temperature alloy forging. The forging and heat treatment process comprises the steps that forging and heating are carried out, wherein a blank is fed into a furnace to be heated, the blank enter-furnace temperature is lower than or equal to 750 DEG C, the blank is heated to 990-1010 DEG C for soaking, a high temperature coating is smeared on the surface of the blank after soaking, and the temperature is maintained for 120-150 min; the blank is prepared, wherein forging modification is carried out through alow-temperature large-deformation forging process; a ring forging is processed, wherein the blank is processed into the ring forging; solid solution is carried out, wherein the forging is installed in the furnace at the room temperature, is heated to 1140-1160 DEG C, is subjected to heat preservation for 70-90 min and is discharged out of the furnace for cooling; and aging is carried out, whereinduring first-stage aging, the temperature rises to 840-860 DEG C, heat preservation is carried out for 60-80 min, during second-stage aging, the temperature rises to 940-960 DEG C, heat preservationis carried out for 150-180 min, and then cooling is carried out. According to the forging and heat treatment process, forging and heat treatment processes are studied and optimized, and the problem that the 750 DEG C-grade high temperature alloy forging is serious in cracking, poor in mechanical property and the like is solved.

Description

technical field [0001] The invention relates to the technical field of process forming and heat treatment, in particular to a forging and heat treatment process of a 750°C superalloy forging. Background technique [0002] High-temperature alloy precision ring forgings for aero-engines are used as key hot-end load-bearing parts. They are key components that directly determine the performance and service life of the whole machine. The harsh service environment places extremely high requirements on its temperature-bearing capacity and mechanical properties. The maximum service temperature of high-temperature alloy precision ring forgings at the hot end of the next-generation aero-engine has reached 750°C, and traditional high-temperature alloy materials have been unable to meet the requirements. The 750°C deformed superalloy is the material of choice for the hot-end load-bearing parts of the next generation of aero-engines at home and abroad, and it will be the main engine mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J1/06B21H1/06C22F1/10C21D9/40
Inventor 何方有
Owner WUXI PAIKE HEAVY CASTING & FORGING
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