Shot peening carbonitriding treatment method and device

A processing method and technology of processing devices, which are applied in heat treatment furnaces, heat treatment equipment, furnace components, etc., can solve the problems of long process time, increased production costs, and impact on safety of use, etc., to improve the ability to isolate high temperature, improve The effect of quality and improving work efficiency

Pending Publication Date: 2022-02-18
HUNAN MECHANICAL & ELECTRICAL POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing method of shot peening carbonitriding treatment generally adopts the treatment method of gas nitriding, but the overall cycle of this treatment method is long, resulting in a long time-consuming process and a corresponding increase in production cost. Therefore, in the actual preparation There are relatively large limitations, and when the existing well-type nitrocarburizing furnace is used for a long time, the internal high temperature will be transferred to the outer wall of the well-type nitrocarburizing furnace through heat, thus affecting the safety of use

Method used

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  • Shot peening carbonitriding treatment method and device
  • Shot peening carbonitriding treatment method and device
  • Shot peening carbonitriding treatment method and device

Examples

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Embodiment 1

[0026] see Figure 1 to Figure 3 , the present invention provides a technical solution: a shot peening carbonitriding treatment method, including a well-type nitrocarburizing furnace that needs to be used in the treatment method, and the specific steps are as follows:

[0027] Step 1: Shot peening of steel will be selected;

[0028] Step 2: Put the shot that needs to be carbonitrided into the well-type nitrocarburizing furnace, and raise the temperature to 500°C. At this time, the air inside the well-type nitrocarburizing furnace is discharged to form a vacuum;

[0029] Step 3: After continuing to heat up to 600-700°C, add gaseous nitrogen, keep it warm for 3 hours, and then cool with the furnace;

[0030] Step 4: Take out the shot peening of Step 3, put it into the container, and process it by pulsed DC glow discharge plasma heat treatment, and the pressure range during processing is 2000Pa;

[0031] Step 5: Temper the finished product at low temperature, which can relax th...

Embodiment 2

[0039] The difference from Example 1 is that the present invention provides a technical solution: a shot peening carbonitriding treatment method, including a well-type nitrocarburizing furnace that needs to be used in the treatment method, and the specific steps are as follows:

[0040] Step 1: Shot peening of steel will be selected;

[0041] Step 2: Put the shot peening to be carbonitrided into the well-type nitrocarburizing furnace, and raise the temperature to 530°C. At this time, the air inside the well-type nitrocarburizing furnace is discharged to form a vacuum;

[0042] Step 3: After continuing to heat up to 650°C, add gaseous nitrogen and keep it warm for 3.5 hours, then cool with the furnace;

[0043] Step 4: Take out the shot blasting of Step 3, put it into the container, and process it by pulsed DC glow discharge plasma heat treatment, and the pressure range during processing is 3000Pa;

[0044] Step 5: Temper the finished product at low temperature, which can rela...

Embodiment 3

[0049] The difference from the above embodiment is that the present invention provides a technical solution: a shot peening carbonitriding treatment method, including a well-type nitrocarburizing furnace that needs to be used in the treatment method, and the specific steps are as follows:

[0050] Step 1: Shot peening of steel will be selected;

[0051] Step 2: Put the shot that needs to be carbonitrided into the well-type nitrocarburizing furnace and raise the temperature to 550°C. At this time, the air inside the well-type nitrocarburizing furnace is discharged to form a vacuum;

[0052] Step 3: After continuing to heat up to 700°C, add gaseous nitrogen and keep it warm for 4 hours, then cool with the furnace;

[0053] Step 4: Take out the shot blasting of Step 3, put it into the container, and process it by pulsed DC glow discharge plasma heat treatment, and the pressure range during processing is 4000Pa;

[0054] Step 5: Temper the finished product at low temperature, which...

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Abstract

The invention discloses a shot peening carbonitriding treatment method and device. The device comprise a well type soft nitriding furnace required in the treatment method, and the method comprises the following specific steps: step 1, performing shot peening on selected steel; step 2, placing obtained pellets needing carbonitriding treatment in the well type soft nitriding furnace, increasing the temperature to 500-550 DEG C, and exhausting air in the well type soft nitriding furnace at the moment to form a vacuum state; and step 3, continuously heating to 600-700 DEG C, adding gas nitrogen, preserving heat for 3-4 hours, and performing cooling along with the furnace. By combining the pulse direct current glow discharge plasma heat treatment with the gas nitriding treatment process, the shot peening carbonitriding treatment quality can be improved, the overall machining time can be greatly shortened, the time is shortened to 5-7 hours from 12 hours or above, the working efficiency is greatly improved, and many defects in an existing treatment method are overcome.

Description

technical field [0001] The invention belongs to the technical field of shot peening processing, and in particular relates to a shot peening carbonitriding treatment method and device. Background technique [0002] Shot peening is a surface strengthening process widely used in factories. It is a cold working process that bombards the surface of the workpiece with pellets and implants residual compressive stress to improve the fatigue strength of the workpiece. It is widely used to improve the mechanical strength, wear resistance and fatigue resistance of parts. And corrosion resistance, etc., and in the early treatment of shot peening, it is necessary to carry out carbon nitrogen treatment on shot peening, so as to ensure the normal use of shot peening in the later stage. [0003] The existing method of shot peening carbonitriding treatment generally adopts the treatment method of gas nitriding, but the overall cycle of this treatment method is long, resulting in a long time-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/32C21D1/34C21D1/18C21D9/36C21D7/06F27D21/00
CPCC23C8/32C21D1/34C21D1/18C21D9/36C21D7/06F27D21/0014
Inventor 熊文伟颜克伦
Owner HUNAN MECHANICAL & ELECTRICAL POLYTECHNIC
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