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Thermal treatment process of elastic chains

A kind of process and elastic chain technology, which is applied in the field of elastic chain heat treatment process, can solve the problems of material waste, affect product production, and fail to guarantee the pass rate, etc., and achieve the effects of reducing tissue stress, improving mechanical performance indicators, and high toughness

Inactive Publication Date: 2014-05-21
CHANGAN AUTOMOBILE (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the chain breaking force requirements of elastic chain products are high, for example, when the chain breaking force is required to be greater than 11KN, the traditional process cannot guarantee a 100% pass rate, which seriously affects the production of the product and causes a lot of material waste

Method used

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  • Thermal treatment process of elastic chains
  • Thermal treatment process of elastic chains
  • Thermal treatment process of elastic chains

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An elastic chain heat treatment process, comprising the following steps:

[0027] Use a salt furnace to heat the workpiece to 840°C to austenitize and homogenize it;

[0028] Cool to 240°C in a nitrate tank, keep isothermal for 6 minutes and then transfer to water cooling;

[0029] It also includes a tempering step: using a nitrate furnace to heat to 320 ° C, and then transferring to water cooling.

Embodiment 2

[0031] An elastic chain heat treatment process, comprising the following steps:

[0032] Use a salt furnace to heat the workpiece to 860°C to austenitize and homogenize it;

[0033] Cool to 260°C in a nitrate tank, keep isothermal for 6 minutes and then transfer to water cooling;

[0034] It also includes a tempering step: use a nitrate furnace to heat to 360 ° C, and then transfer to water cooling.

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Abstract

The invention discloses a thermal treatment process of elastic chains. The thermal treatment process comprises the following steps: heating workpieces to austenitize and homogenize; subsequently, cooling the workpieces to be 240-260 DEG C in a nitrate tank and transferring the workpieces into water to cool after the temperature is retained. Through the thermal treatment process of elastic chains, the requirements that the mechanical performance index of the elastic chains is greatly improved and the qualified rate is increased to 100% can be met fundamentally.

Description

technical field [0001] The invention relates to an elastic chain heat treatment process. Background technique [0002] Chain breaking force is an important indicator of elastic chain products, and elastic chain products require a 100% pass rate. The traditional heat treatment process of elastic chain products adopts mesh belt furnace to heat at 850 ℃, and quench oil after keeping low temperature for a certain period of time. Then, it is air-cooled after tempering at 360°C in a mesh belt furnace. When the chain breaking force of the elastic chain product is required to be high, for example, when the chain breaking force is required to be greater than 11KN, the traditional process cannot guarantee a 100% pass rate, which seriously affects the production of the product and causes a lot of material waste. SUMMARY OF THE INVENTION [0003] The primary purpose of the present invention is to provide a kind of elastic chain heat treatment process that satisfies the large chain br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C21D1/18C21D1/607
Inventor 谭江
Owner CHANGAN AUTOMOBILE (GRP) CO LTD
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