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A kind of manufacturing method of gh4169 alloy fine-grain disk billet

A GH4169, manufacturing method technology, applied in the direction of manufacturing tools, other manufacturing equipment/tools, metal processing equipment, etc., can solve the problems of difficult metal forming, unfavorable forming and quality compliance, increased forging fire times, etc., to improve fatigue resistance, Ensure the effect of fineness and uniformity

Active Publication Date: 2016-03-30
GUIZHOU AVIATION TECHN DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The ordinary and high-strength forging process of GH4169 in the past, such as CN101412066B and CN100500881C, in the upsetting process, the workpiece is in direct contact with the hammer and anvil, and the metal on both ends is not easy to flow outward due to friction. , it will form double drums, which will increase the number of forging fires for the purpose of shaping, which is not conducive to the forming and quality of products.

Method used

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  • A kind of manufacturing method of gh4169 alloy fine-grain disk billet
  • A kind of manufacturing method of gh4169 alloy fine-grain disk billet
  • A kind of manufacturing method of gh4169 alloy fine-grain disk billet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Cutting, wrapping, three-stage heating and heat preservation:

[0039] Cover the billet with asbestos pads, and heat in three stages at 845°C (calculate the heating time as 6min / 10mm), 980°C (calculate the heating time as 8min / 10mm), and 1015°C (calculate the heating time as 6min / 10mm) heating the billet;

[0040] (2) Preheat the metal pad and use it as a pad at the upper and lower ends of the blank:

[0041] Preheat the metal pad with a thickness of 30mm at 295°C and use it as a pad at the upper and lower ends of the billet;

[0042] (3) The first fire heating upsetting:

[0043] Put the blank with the metal pad on a 2500T hydraulic press for upsetting, continue to deform at a constant speed by 20%, until the temperature measured by the optical thermometer is 1000°C, stay for a short period of 8 seconds, and then continue to deform at a constant speed by 30%, to the optical temperature The temperature measured by the thermometer is 960°C, and the final forging t...

Embodiment 2

[0051] (1) Cutting, wrapping, three-stage heating and heat preservation:

[0052] Cover the billet with asbestos pads, and heat in three stages at 855°C (calculated as 6min / 10mm for heating time), 990°C (calculated as 8min / 10mm for heating time), and 1025°C (calculated as 6min / 10mm for heating time) heating the billet;

[0053] (2) Preheat the metal pad and use it as a pad at the upper and lower ends of the blank:

[0054] Preheat the metal pad with a thickness of 30mm at 305°C and use it as a pad at the upper and lower ends of the billet;

[0055] (3) The first fire heating upsetting:

[0056] Put the blank with the metal pad on a 2500T hydraulic press for upsetting, and continue to deform 30% at a constant speed until the temperature measured by the optical thermometer is 1000°C. After a short stay of 12 seconds, continue to deform 40% at a constant speed until the temperature measured by the optical thermometer is 1000°C. The temperature measured by the thermometer is 96...

Embodiment 3

[0064] (1) Cutting, wrapping, three-stage heating and heat preservation:

[0065] Cover the billet with asbestos pads, and heat in three stages at 850°C (calculate the heating time as 6min / 10mm), 985°C (calculate the heating time as 8min / 10mm), and 1020°C (calculate the heating time as 6min / 10mm) heating the billet;

[0066] (2) Preheat the metal pad and use it as a pad at the upper and lower ends of the blank:

[0067] Preheat the metal pad with a thickness of 30mm at 300°C and use it as a pad at the upper and lower ends of the billet;

[0068] (3) The first fire heating upsetting:

[0069] Put the blank with the metal backing on a 2500T hydraulic press for upsetting, continue to deform at a constant speed by 25%, until the temperature measured by the optical thermometer is 1000°C, stay for 10 seconds and then continue to deform at a constant speed by 35%, until the temperature measured by the optical thermometer is 1000°C. The temperature measured by the thermometer is 96...

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Abstract

The invention discloses a method for manufacturing a GH4169 alloy fine-grained disk billet. The original billet of GH4169 is made by heating the billet, heating upsetting for the first time, upsetting for the second time, punching and rolling. Set, use three-stage heating to process the billet, preheat the metal pad and place it on both ends of the billet, then heat upsetting, select 1020 ° C for upsetting, punching, and hole expansion, and 1010 ° C for rolling. The invention can slow down the temperature drop rate of the workpiece and obtain more operable time, which is beneficial to keep the deformation of the upper and lower end surfaces of the blank consistent with the deformation of the middle section of the blank to ensure the uniformity of the structure of each part of the workpiece and avoid the critical deformation. Coarse grains are formed, so that the final grain size is better than grade 8, which ensures the fine grain structure, realizes the fine grain of the GH4169 alloy plate, and greatly improves the fatigue resistance of the GH4169 alloy.

Description

technical field [0001] The invention relates to a method for manufacturing a GH4169 alloy fine crystal plate blank. Background technique [0002] The GH4169 alloy has good comprehensive properties in the temperature range of -253 to 700 ° C, and the yield strength below 650 ° C ranks first among deformed superalloys, and has good fatigue resistance, radiation resistance, oxidation resistance, corrosion resistance, and good Machinability and welding performance. It can manufacture parts with complex shapes, and has been widely used in the above temperature range in aerospace, nuclear energy, petroleum industry and extrusion dies. Alloys have different heat treatment systems to control the grain size, control the δ phase morphology, distribution and quantity, so as to obtain different levels of mechanical properties. Alloy heat treatment system is divided into 3 categories: [0003] Ⅰ: (1010~1065)℃±10℃, 1h, oil cooling, air cooling or water cooling, 720℃±5℃, 8h, furnace coo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P23/02B21J13/00
Inventor 吴永安杨家典张建军谢撰业张胜利
Owner GUIZHOU AVIATION TECHN DEV
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