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Heat treatment induction quenching process for small hole

An induction hardening and process technology, applied in the field of small hole heat treatment induction hardening process, can solve the problems of complex heat treatment process, short product service life, insignificant energy saving effect, etc., achieving low cost, high production efficiency, and solving oil quenching is not hard. Effect

Inactive Publication Date: 2016-10-12
XINGHUA DONGHUA GEAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the advantages of high strength and high wear resistance, alloy steel castings gradually replace ordinary carbon steel parts and are widely used in the field of casting. In practical applications, it is necessary to reasonably select the strength, hardness and toughness of low alloy steel. The heat treatment process of steel castings is complicated, and the energy-saving effect is not obvious. Although its strength and hardness can be improved to a certain extent, the process needs to be improved for certain high-demand and high-standard workpieces.
And during the quenching process, the oil output is high, which increases the cost, and the surface hardness is not easy to crack from the moment it appears
Most of the current technology pollutes the environment, the production time is long, and the service life of the product is short

Method used

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  • Heat treatment induction quenching process for small hole

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Experimental program
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Effect test

Embodiment 1

[0017] An induction quenching process for small hole heat treatment, the process steps are as follows:

[0018] A. Check whether the workpiece has cracks, bruises and other defects, and install the furnace;

[0019] B. Send the workpiece into the washing machine for drying, the time is 1min;

[0020] C. Carry out induction heating, the heating time is 4s, the power of the quenching machine is set to 10%, the current is 500A, the quenching stop position is 1.00mm, the cooling position is 200mm, the speed is 500mm / min, quenching and cooling with HX-200 medium, and the spray method is used cooling down;

[0021] D. Send the quenched workpiece into the washing machine to wash and dry for 1min;

[0022] E Temper the dried workpiece immediately, set the temperature at 200°C, and hold the holding time for 2 hours;

[0023] F. After cooling with cooling medium, check the metallographic structure according to the standard, and test the hardness of the product;

[0024] G. Soak the ...

Embodiment 2

[0026] An induction quenching process for small hole heat treatment, the process steps are as follows:

[0027] (A. Check whether the workpiece has cracks, bruises and other defects, and install the furnace;

[0028] B. Send the workpiece into the washing machine for drying, the time is 2min;

[0029] C. Carry out induction heating, the heating time is 6s, the power of the quenching machine is set to 10%, the current is 500A, the quenching stop position is 1.00mm, the cooling position is 200mm, the speed is 500mm / min, quenching and cooling with HX-200 medium, using spraying method cooling down;

[0030] D. Send the quenched workpiece into the cleaning machine for cleaning and drying for 2 minutes;

[0031] E Temper the dried workpiece immediately, set the temperature at 220°C, and hold the holding time for 3 hours;

[0032] F. After cooling with cooling medium, check the metallographic structure according to the standard, and test the hardness of the product;

[0033] G. S...

Embodiment 3

[0035] An induction quenching process for small hole heat treatment, the process steps are as follows:

[0036] A. Check whether the workpiece has cracks, bruises and other defects, and install the furnace;

[0037] B. Send the workpiece into the washing machine for drying, the time is 2min;

[0038] C. Carry out induction heating, the heating time is 5s, the power of the quenching machine is set to 10%, the current is 500A, the quenching stop position is 1.00mm, the cooling position is 200mm, the speed is 500mm / min, quenching and cooling with HX-200 medium, and the spray method is used cooling down;

[0039] D. Send the quenched workpiece into the washing machine to wash and dry for 1min;

[0040] E Temper the dried workpiece immediately, set the temperature at 240°C, and hold the holding time for 2.5h;

[0041] F. After cooling with cooling medium, check the metallographic structure according to the standard, and test the hardness of the product;

[0042] G. Soak the wor...

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Abstract

The invention discloses a heat treatment induction quenching process for a small hole. The process comprises the following steps of inspection, cleaning and drying, quenching, cleaning and drying, tempering, detection and rust prevention. The process is simple, the whole course is environmentally friendly and free of pollution, the hardness, strength and wear resistance of the small hole can be effectively improved, and the service life of the small hole is prolonged. In the quenching step, an HX-200 medium is adopted for cooling, so that quenching for the small hole is uniform, a uniform skin film is formed on the metal surface, a workpiece is effectively protected against cracking, the brought-out quantity is extremely small, the quenched workpiece is free of cleaning, the medium is free of discharge, the medium is applicable to various materials, the concentration does not need to be adjusted, the production cost is reduced, energy is saved, environmental pollution is reduced, and economic benefits are improved.

Description

technical field [0001] The invention relates to a small hole heat treatment induction quenching process. Background technique [0002] Due to the advantages of high strength and high wear resistance, alloy steel castings gradually replace ordinary carbon steel parts and are widely used in the field of casting. In practical applications, it is necessary to reasonably select the strength, hardness and toughness of low alloy steel. The heat treatment process of steel castings is complicated, and the energy-saving effect is not obvious. Although its strength and hardness can be improved to a certain extent, the process needs to be improved for certain high-demand and high-standard workpieces. And during the quenching process, the oil output is high, which increases the cost, and the phenomenon that the surface hardness is not easy to crack appears from the beginning. The current technology mostly pollutes the environment, has long production time and short service life of produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/10C21D1/667
CPCC21D1/10C21D1/667Y02P10/25
Inventor 徐孙传卢俊蒋亚龙薛文奎王广忠张文泉
Owner XINGHUA DONGHUA GEAR
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