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Method for carrying out calendaring molding on GH202 high-temperature alloy sheet

A technology of GH202 and high-temperature alloy, which is applied in the field of plate stretch forming, can solve problems such as forging cracking and surface size deviation, and achieve the effects of reducing forming times, improving production efficiency, and reducing energy consumption

Active Publication Date: 2015-05-20
WUXI TURBINE BLADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the present invention provides a rolling forming method of GH202 high-temperature alloy plate, which can effectively solve the problems of forging cracking, profile size deviation and multiple firing times existing in the existing hydraulic press forming, thereby improving production efficiency ,Reduce energy consumption

Method used

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  • Method for carrying out calendaring molding on GH202 high-temperature alloy sheet
  • Method for carrying out calendaring molding on GH202 high-temperature alloy sheet
  • Method for carrying out calendaring molding on GH202 high-temperature alloy sheet

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Cutting the sheet material, rounding the edges of the sheet material, see Figure 4 To avoid edge cracking during rapid prototyping;

[0018] (2) Plate heating, 850°C into medium temperature, medium temperature heat preservation coefficient 0.8min / mm, 1140°C into high temperature, high temperature heat preservation coefficient 0.6min / mm;

[0019] (3) Preforming: Put the heated sheet into the mold and preform it with a friction press. After forming, the equipment should return quickly to ensure that the contact time between the workpiece and the upper mold is less than 5s, so as to avoid the forging from hugging the upper mold due to thermal expansion and cold contraction. ;

[0020] (4) After preforming, the forging is returned to the furnace for heat treatment, and the furnace is heated for 15 minutes, and the heating coefficient is 0.4 min / mm;

[0021] (5) The friction press is used for the final forging of the forging. After forming, the equipment should return...

Embodiment 2

[0023] (1) Cutting the sheet material, rounding the edges of the sheet material, see Figure 4 To avoid edge cracking during rapid prototyping;

[0024] (2) Sheet metal heating, 850°C into medium temperature, medium temperature heat preservation coefficient 1.6min / mm, 1140°C into high temperature, high temperature heat preservation coefficient 0.4min / mm;

[0025] (3) Preforming: Put the heated sheet into the mold and preform it with a friction press. After forming, the equipment should return quickly to ensure that the contact time between the workpiece and the upper mold is less than 5s, so as to avoid the forging from hugging the upper mold due to thermal expansion and cold contraction. ;

[0026] (4) After preforming, the forging is returned to the furnace for heat treatment, and the furnace is heated for 13 minutes, and the heating coefficient is 0.6min / mm;

[0027] (5) The friction press is used for the final forging of the forging. After forming, the equipment should r...

Embodiment 3

[0029] (1) Cutting the sheet material, rounding the edges of the sheet material, see Figure 4 To avoid edge cracking during rapid prototyping;

[0030] (2) Sheet metal heating, 850°C into medium temperature, medium temperature heat preservation coefficient 1.2min / mm, 1140°C into high temperature, high temperature heat preservation coefficient 0.8min / mm;

[0031] (3) Preforming: Put the heated sheet into the mold and preform it with a friction press. After forming, the equipment should return quickly to ensure that the contact time between the workpiece and the upper mold is less than 5s, so as to avoid the forging from hugging the upper mold due to thermal expansion and cold contraction. ;

[0032] (4) After preforming, the forging is returned to the furnace for heat treatment, and the furnace is heated for 10 minutes, and the heating coefficient is 0.8 min / mm;

[0033] (5) The friction press is used for the final forging of the forging. After forming, the equipment should ...

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Abstract

The invention provides a method for carrying out calendaring molding on a GH202 high-temperature alloy sheet, which can effectively solve the problems of forging cracking, size deviation of a molded surface and large heating number in the prior art of adopting an oil press to carry out multiple heating number forming so as to improve the production efficiency and reduce energy consumption. The method comprises the following processing steps of: firstly, blanking a sheet metal; then heating and preforming the sheet metal; carrying out return heat treatment on a preformed forging; and finally, carrying out finish forging forming. The method is characterized in that in both the steps of preforming and finish forging forming, a friction press is adopted to carry out forging forming.

Description

technical field [0001] The invention relates to the technical field of stretch forming of plates, in particular to the technical field of stretch forming of GH202 superalloy plates, and specifically relates to a calendering forming method of GH202 high temperature alloy plates. Background technique [0002] The GH202 material itself is a nickel-based aging precipitation-strengthened superalloy. It is a new material developed for high-thrust rocket engines and is often used in its high-temperature parts and structural parts. A GH202 alloy medium-thick-wall plate (thickness 17mm) forging with complex curved surface shape, its structure is shown in figure 1 , figure 2 and image 3 In the past, the forging was formed by using 800T hydraulic press for multiple fires. However, due to the very poor thermal processing plasticity of this material, forging cracks are easily generated, and the crack growth rate is relatively fast. Therefore, the products using the previous processin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J1/04B21J1/06
Inventor 陈瑞钢王孝敏
Owner WUXI TURBINE BLADE