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Thermoelectric composite treatment method suitable for reducing residual stress of metal materials

A metal material and residual stress technology, which is applied in the field of material processing to achieve the effects of overcoming long heating time, simple device and reducing aggregation

Inactive Publication Date: 2014-05-21
湖南高创海捷工程技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is aimed at the welding problem between two different materials, and the applicable object is limited to the welding residual stress

Method used

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  • Thermoelectric composite treatment method suitable for reducing residual stress of metal materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The following will take 20CrMnTi material as an example to illustrate the method of eliminating stress by using the method of the present invention.

[0034] Step 1. Prepare the sample, make the gear material 20CrMnTi that has been ground and burnt on the surface into a metal workpiece 4 with a size of 15mm*15mm*10mm, and polish the two sides of the metal workpiece 4 to be polished with sandpaper , so that more effective electrode contact points are exposed on both sides of the metal workpiece 4 to be processed;

[0035] Step 2. Place the metal workpiece 4 to be processed at both ends of the electrodes of the pulse power supply. The two sides of the metal workpiece 4 to be processed are directly connected to the pulse power supply through wires. Paste to reduce contact resistance;

[0036] Step 3, place the infrared heating tube 2 near the surface of the metal workpiece 4 to be processed, and coat the place where the thermocouple 3 is in contact with the metal workpiec...

Embodiment 2

[0042] In the following, the bearing steel GCr15 material will be taken as an example to illustrate the method for eliminating its stress by using the method of the present invention.

[0043] Step 1, prepare the sample, make the bearing steel GCr15 after grinding into a metal workpiece 4 to be processed with a size of 15mm*15mm*10mm, and polish the two sides of the metal workpiece 4 to be processed with sandpaper to make the metal to be processed More effective electrode contact points are exposed on both sides of the workpiece 4;

[0044] Step 2. Place the metal workpiece 4 to be processed at both ends of the electrodes of the pulse power supply. The two sides of the metal workpiece 4 to be processed are directly connected to the pulse power supply through wires. Paste to reduce contact resistance;

[0045] Step 3, place the infrared heating tube 2 near the surface of the metal workpiece 4 to be processed, and coat the place where the thermocouple 3 is in contact with the m...

Embodiment 3

[0051] In the following, the rail material U71Mn will be taken as an example to describe the method of eliminating stress using the method of the present invention.

[0052] Step 1, prepare the sample, make the rail material U71Mn after grinding into a metal workpiece 4 to be processed with a size of 15mm*15mm*10mm, and polish the two sides of the metal workpiece 4 to be processed brightly with sandpaper to make the metal workpiece to be processed More effective electrode contact points are exposed on both sides of the workpiece 4;

[0053] Step 2. Place the metal workpiece 4 to be processed at both ends of the electrodes of the pulse power supply. The two sides of the metal workpiece 4 to be processed are directly connected to the pulse power supply through wires. Paste to reduce contact resistance;

[0054] Step 3, place the infrared heating tube 2 near the surface of the metal workpiece 4 to be processed, and coat the place where the thermocouple 3 is in contact with the m...

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Abstract

The invention relates to a thermoelectric composite treatment method suitable for reducing residual stress of metal materials. The method comprises the following steps: 1, preparing a test sample; 2, placing a to-be-treated metal workpiece (4) at two ends of electrodes of a pulsed power supply; 3, placing an infrared heating pipe (2) near the surface of the to-be-treated metal workpiece (4); 4, starting an infrared heating controller (1) and setting the infrared heating temperature at 180-190 DEG C; 5, when the infrared heating temperature reaches 180 DEG C, starting the pulsed power supply (5) at the same time; and 6, simultaneously operating the infrared heating pipe (2) and the pulsed power supply (5) for 10 minutes till the whole treatment process is completed, thereby completing the treatment of the to-be-treated metal workpiece (4). The method disclosed by the invention has the advantages that temperature-controllable low temperature thermal field treatment is carried out on metal materials by using a portable movable infrared heating device, so that the problems that in the traditional heat treatment, the heating time is long, the whole workpiece needs to be put in and other operations are inconvenient to carry out are solved.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a thermoelectric composite treatment method suitable for reducing the residual stress of metal materials. Background technique [0002] The residual stress is caused by the inhomogeneous distribution of dislocations in the grains, which leads to the high-energy instability of the internal microscopic particles in the material. Therefore, in order to eliminate the residual stress inside the material, it is necessary to apply an effective external force, which may open the These intertwined dislocation nodes open up dislocation clusters that are hindered in accumulation, gradually annihilate the dislocation form, reduce the dislocation density, and make the remaining dislocations more regular and orderly, so as to reduce the residual stress. [0003] The residual stress in metal materials has an important influence on the mechanical properties of materials, how to reduc...

Claims

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Application Information

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IPC IPC(8): C21D10/00C21D1/34
CPCY02P10/20
Inventor 尚振涛贾莹金滩占国栋翟少朋彭思为谢桂芝
Owner 湖南高创海捷工程技术有限公司
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