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CH4169 alloy forging piece grain size analysis and predication method

A technology of GH4169 and prediction method, which is applied in the field of high-temperature alloy forging, can solve the problems of small sample size, etc., and achieve the effect of convenient use and high prediction accuracy

Active Publication Date: 2015-06-24
重庆两航金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these models are established based on isothermal and constant strain rate compression experiments. The small sample size is generally Ф8×12mm or Ф10×12mm, and they are only applicable to specific initial microstructure and deformation conditions, and cannot be directly applied to the actual production of GH4169 alloy. Grain Size Prediction for

Method used

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  • CH4169 alloy forging piece grain size analysis and predication method
  • CH4169 alloy forging piece grain size analysis and predication method
  • CH4169 alloy forging piece grain size analysis and predication method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Analyze and predict the grain size of the GH4169 alloy five-stage plate and the die forgings obtained on the SPKA22400 screw press;

[0032] The first step, compression test of GH4169 alloy double cone specimen

[0033] Adopt attached figure 1 The GH4169 alloy double cone sample shown is between the upper and lower anvils of the screw press for a near isothermal forging compression test. The original grain size of the GH4169 alloy double cone sample is grade 5. figure 2 . The main parameters of the test include: the heating temperature of the upper and lower anvils is 900℃; the heating temperature of the GH4169 alloy double cone sample is 930℃, 960℃, 990℃, 1010℃ and 1040℃; the maximum deformation degree of the GH4169 alloy double cone sample is 60%; After the deformation, the sample is quickly placed in a water tank for water cooling treatment, with image 3 It is a schematic diagram of the round cake after compression.

[0034] The second step is the finite element simu...

Embodiment 2

[0050] Analyze and predict the grain size of the die forgings obtained on the GH4169 alloy grade 5-8 disc SPKA22400 screw press;

[0051] The first step, GH4169 alloy double cone compression test

[0052] Adopt attached figure 1 The GH4169 alloy double cone sample shown is between the upper and lower anvils of the screw press for a near isothermal forging compression test. The original grain size of the GH4169 alloy double cone is grade 5. figure 2 . The main parameters of the test include: the heating temperature of the upper and lower anvils is 900℃; the heating temperature of the GH4169 alloy double cone sample is 930℃, 960℃, 990℃, 1010℃ and 1040℃; the maximum deformation degree of the GH4169 alloy double cone sample is 60%; After the deformation, the sample is quickly placed in a water tank for water cooling treatment, with image 3 It is a schematic diagram of the round cake after compression.

[0053] The second step, finite element simulation of GH4169 alloy double cone ...

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Abstract

The invention relates to the field of high-temperature alloy forging, and particularly relates to a CH4169 alloy forging piece grain size analysis and predication method. The CH4169 alloy forging piece grain size analysis and predication method comprises the following steps: carrying out a near isothermal forging experiment on a CH4169 alloy sub-size double-cone test sample; carrying out finite element simulation on a near isothermal forging experiment process to obtain forging thermal parameters of the test sample; determining the grain size and determining forging thermal parameter values according to a finite element calculation result; drawing a contour map of the relation of the grain size and the forging thermal parameters according to the obtained grain size and forging thermal parameters; carrying out the finite element simulation on an actual production process of a CH4169 alloy forging piece, and counting the forging thermal parameters; and determining the grain size of a part to be analyzed and predicated by utilizing the drawn contour map of the grain size and the forging thermal parameters. According to the CH4169 alloy forging piece grain size analysis and predication method, the established contour map of the relation of the grain size and the CH4169 alloy forging thermal parameters is used for analyzing and predicating the grain size in the CH4169 alloy forging piece, and the method is convenient to use and has the high predication accuracy.

Description

Technical field [0001] The invention relates to the field of high-temperature alloy forging, in particular to a method for analyzing and predicting the grain size of GH4169 alloy forgings. Background technique [0002] GH4169 alloy is widely used in the manufacture of parts and components in aviation, aerospace, nuclear industry and petrochemical industry, such as turbine discs, compressor discs, casings, turbine shafts and blades of aero engines. In order to meet the requirements of the above-mentioned key and heavy parts of aero-engines for mechanical properties such as strength, high and low axis fatigue, the grain size of the alloy is required to meet the design requirements. The solution heat treatment temperature of GH4169 alloy is lower than the static recrystallization temperature, so that the alloy cannot undergo static recrystallization during solution heat treatment. Therefore, the recrystallization in the GH4169 alloy is completed by dynamic recrystallization during ...

Claims

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Application Information

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IPC IPC(8): G01N15/02
Inventor 杨艳慧刘东王建国
Owner 重庆两航金属材料有限公司
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