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Heat treatment technology of high-strength spring

A high-strength, high-tech technology, applied in the field of material processing, can solve problems such as difficult to process springs and cumbersome operations, and achieve the effects of improving strength and rigidity, simple operation, and easy processing

Inactive Publication Date: 2019-12-24
JIANGSU HUAHAI STEEL STRUCTURE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing processing techniques are difficult to process high-quality springs, and the operation is cumbersome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The heat treatment process of high-strength springs includes the following steps:

[0015] (1) Put the bent spring forming part into a heating furnace, raise the temperature to 850°C, keep it warm for 20h, cool down with the furnace to 300°C, and keep it warm for 20h;

[0016] (2) Rapidly raise the temperature of the heating furnace to 750°C again, and keep it warm for 30 hours; quickly cool it down to 250°C with the furnace, and keep it warm for 30 hours;

[0017] (3) After the step (2) is completed, take it out when it is further cooled to 200°C with the furnace, and air-cool to room temperature.

[0018] The spring prepared by the above process has high comprehensive performance, high strength and rigidity, and will not suffer from fatigue damage after repeated use for many times.

Embodiment 2

[0020] The heat treatment process of high-strength springs includes the following steps:

[0021] (1) Put the bent spring formed part into a heating furnace, raise the temperature to 800°C, keep it warm for 15h, cool down with the furnace to 400°C, and keep it warm for 25h;

[0022] (2) Rapidly raise the temperature of the heating furnace to 700°C again, and keep it warm for 20 hours; quickly cool it down to 200°C with the furnace, with a rapid cooling rate of 30°C / h, and keep it warm for 30 hours;

[0023] (3) After the step (2) is completed, take it out when it is further cooled to 200°C with the furnace, and air-cool to room temperature.

[0024] The spring prepared by the above process has high comprehensive performance, high strength and rigidity, and will not suffer from fatigue damage after repeated use for many times.

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PUM

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Abstract

The invention discloses a heat treatment technology of a high-strength spring. The heat treatment technology comprises the following steps of putting a bent spring forming piece into a heating furnace, increasing the temperature to 800-850 DEG C, conducting heat preservation for 15-20 hours, furnace-cooling to 300-400 DEG C, and then conducting heat preservation for 20-25 hours; once again quicklyincreasing the temperature of the heating furnace to 700-750 DEG C, and conducting heat preservation for 20-30 hours; quickly furnace-cooling to 200-250 DEG C, and then conducting heat preservation for 30 hours; after the steps are finished, furthermore furnace-cooling to 200 DEG C, then taking out the spring, and air-cooling to the room temperature. The technology is easy to operate, after heatprocessing, the strength and rigidity of the spring can be improved, the fatigue resistance of the spring is improved, processing is easy, and the production efficiency is effectively improved.

Description

technical field [0001] The invention relates to a heat treatment process, in particular to a high-strength spring heat treatment process, and belongs to the field of material processing. Background technique [0002] Spring is a mechanical part that uses elasticity to work. It is made of elastic material, which is easy to deform under the action of external force, and returns to its original shape after removing the external force. It is generally made of spring steel. High-strength springs are mainly used in harsh environments, and generally require high strength, stable rigidity, and good accident resistance; secondly, they need to have strong anti-fatigue ability under alternating stress , to ensure its service life. However, most of the existing processing techniques are difficult to process high-quality springs, and the operation is cumbersome. Contents of the invention [0003] In view of the above-mentioned problems in the prior art, the object of the present inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/02
CPCC21D9/02
Inventor 姜志勇
Owner JIANGSU HUAHAI STEEL STRUCTURE CO LTD