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Die forging forming technology for GH4169 alloy forge piece

A GH4169, forming process technology, applied to the driving device of the forging press, etc., can solve the problems of poor stability and uneven structure of forgings, achieve the effect of large striking energy, large flywheel energy storage, and reliable forming

Inactive Publication Date: 2014-06-04
WUXI TURBINE BLADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a die forging forming process of GH4169 alloy forgings, which can solve the existing problems of poor stability, uneven structure and relatively deep mixed crystals on the surface when hydraulic presses or hammers are used for die forging GH4169 alloy forgings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Processing a GH4169 alloy forging, which includes the following process steps: first, the bar is blanked and the end face is rounded; then the bar is heated and pier is rough-machined to make a blank, and then the protective agent of the grade SA-35 is sprayed on the surface of the blank ; Then heat the billet before forging and keep it warm. First, heat it at a medium temperature. 0.8min / mm; the billet leaves the heating furnace and is transferred to a high-energy screw press for die forging. The transfer time of the billet should be within 80 seconds. The number of hammering times for die forging is ≤10 times. It is completed in-house, and finally the forgings after die forging are subjected to solution treatment and then aging treatment.

Embodiment 2

[0016] Processing a GH4169 forging, which includes the following process steps: first, the bar is blanked and the end face is rounded; then the bar is heated and then rough-machined to form a blank, and then the protective agent of the grade SA-35 is sprayed on the surface of the blank; Then heat the blank before forging and keep it warm. First, heat it at a medium temperature. The heating temperature is 850°C, and the medium temperature insulation coefficient is 0.8 min / mm. Then the blank is heated with the furnace at a high temperature. The high temperature heating temperature is 950°C, and the high temperature insulation coefficient is 1.0 min / mm; the billet leaves the heating furnace and is transferred to a high-energy screw press for die forging. The transfer time of the billet should be within 80 seconds. The number of hammering times for die forging is ≤10 times. Complete, and finally carry out aging treatment to the forging after die forging.

Embodiment 3

[0018] Processing a GH4169 forging, which includes the following process steps: first, the bar is blanked and the end face is rounded; then the bar is heated and then rough-machined to form a blank, and then the protective agent of SA-35 is sprayed on the surface of the blank; Then heat the billet before forging and keep it warm. First, it is heated at medium temperature. The medium temperature heating temperature is 990°C, and the medium temperature heat preservation coefficient is 1.2min / mm. Then the billet is heated with the furnace at high temperature. The high temperature heating temperature is 1060°C, and the high temperature heat preservation coefficient is 0.6. min / mm; the billet leaves the heating furnace and is transferred to a high-energy screw press for die forging. The transfer time of the billet should be within 80 seconds. The number of hammering times for die forging is ≤10 times. Complete, and finally carry out solid solution treatment to the forged piece after...

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Abstract

The invention provides a die forging forming technology for a GH4169 alloy forge piece to solve the problems that when a hydraulic machine or a counter-blow hammer is utilized for carrying out die forging on the GH4169 alloy forge piece in the prior art, the forge piece is poor in stability and uneven in tissue, and large-depth mixed crystals exist on the surface of the forge piece. The die forging forming technology comprises the first step of feeding bar stock, the step of heating the bar stock to manufacture a blank, the step of carrying out heating and thermal insulation on the manufactured blank before forging, the step of carrying out die forging forming on the blank on which heating and thermal insulation are carried out before forging, and the step of carrying out heat treatment on the die forging formed forge piece. The die forging forming technology is characterized in that a high-power screw press is utilized for carrying out die forging forming on the blank heated before forging.

Description

technical field [0001] The invention relates to the field of die forging forming technology of GH4169 alloy forgings, in particular to the field of die forging processing of GH4169 alloy forgings for aviation and aerospace engines, and specifically relates to a die forging forming process of GH4169 alloy forgings. Background technique [0002] GH4169 alloy is widely used in aviation and aerospace fields, mainly used in engine discs, shaft parts, blades and casings, and its application weight accounts for about 50% of the superalloy. Due to the high degree of alloying of GH4169, the forming resistance of forgings is large, the structure and performance requirements of forgings are high, the forging times are required to be as few as possible, and the required forging equipment is required to be as large as possible. At present, the die forging production equipment of GH4169 alloy discs mainly adopts hydraulic press and counter hammer. The stability of forgings in the process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02B21J9/18B21J1/06B21J9/20
Inventor 仲维光李晓婷李湘军王金吕刘东赵兴东魏丽刘铭理
Owner WUXI TURBINE BLADE
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