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Forging method for GH80A alloy annular piece

A technology of ring parts and alloys, which is applied in the field of forging and thermal processing, and can solve the problems of uneven structure of GH80A ring forgings

Inactive Publication Date: 2021-04-30
SHAANXI HONGYUAN AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is: to solve the uneven structure problem of GH80A ring forging, provide a kind of forging method that can improve the structure uniformity of GH80A ring forging and meet the standard requirements

Method used

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Embodiment 1

[0038] The size of the required GH80A alloy ring forging is: outer diameter Φ1004±5×inner diameter Φ891±5×height 132±3, unit mm; the wall thickness of the superalloy forging is about 56.5mm, and the ratio of height to thickness is about 2.33. According to the size of the GH80A alloy ring forging, the blanking specification is determined as: Φ250×510mm. In the embodiment of the present invention, the final forging temperature corresponding to the GH80A alloy ring forging is set at 980°C to 1020°C.

[0039] According to the phase diagram of the GH80A alloy, put the billet blanked according to the specifications into the electric furnace and hold it at a preheating temperature of 970°C. The holding time is 250mm×0.8min / mm=200min. Transfer the billet out of the furnace to a 2500t fast forging machine for upsetting pie punching. The size of the punching core material is Φ 180×55mm.

[0040] Carry out air cooling after blank punching, cut off the inner hole surface after cooling, u...

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Abstract

The invention belongs to the field of forging hot working, and discloses a forging method for a GH80A alloy annular piece. The forging method comprises the following steps of step 1, enabling a blank to enter a furnace to be subjected to two-stage type heating, and upsetting a cake to the height of a forged piece after heating to obtain a cake blank; step 2, punching the cake blank obtained after cake upsetting to obtain an annular blank, and cooling the forged piece to the room temperature through air after punching; step 3, turning an inner hole of the annular blank subjected to air cooling; step 4, enabling the annular blank with the turned inner hole to enter the furnace again to be subjected to two-section type heating, and after heating is completed, pre-reaming the annular blank to the size of a pierced shape through multiple heating numbers; step 5, chamfering the upper and lower end surfaces of the inner and outer circles of the pierced shape; and step 6, enabling the chamfered pierced shape to enter the furnace to be subjected to two-section type heating, and after heating is completed, performing final chambering to the final size of the forged piece. According to the method, the technological parameters of all links are controlled, including temperature, time, deformation quantity and deformation rate, so that the grain size of the final forged piece is uniform, a product meets the final requirement, and the percent of pass of the product is effectively improved.

Description

technical field [0001] The invention belongs to the field of forging thermal processing, and relates to a forging method of a GH80A alloy ring piece. Background technique [0002] GH80A is a Ni-Cr base superalloy strengthened by Al and Ti aging, which has good creep resistance and oxidation resistance at 650℃~850℃. The alloy has good cold and hot workability, and is used in aero-engines to manufacture various high-temperature key components such as turbine rotor blades, bearing rings, bolts and casings. [0003] Since GH80A alloy forgings have relatively high requirements on the uniformity of grain size, the requirements for the control of production fire times, deformation amount, deformation temperature and deformation rate of forgings are relatively high. If it is not in place, it will directly affect the uniformity of the organization, making the product unable to meet the final requirements, causing the product to be scrapped and resulting in a great waste of resources...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21J5/08B23P15/00
CPCB21J5/002B21J5/08B23P15/00
Inventor 赵磊王伟田淼张延珍甄小辉
Owner SHAANXI HONGYUAN AVIATION FORGING
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