Heat treatment induction hardening technique for sprocket wheel

An induction hardening and process technology, which is applied in heat treatment furnaces, heat treatment equipment, quenching agents, etc., can solve the problems of short product life, complicated heat treatment process, and inconspicuous energy-saving effect, so as to prolong the service life, improve hardness, and save energy. Effect

Inactive Publication Date: 2016-10-12
XINGHUA DONGHUA GEAR
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  • Abstract
  • Description
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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 hardening technique for sprocket wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A sprocket heat treatment induction hardening process, 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 6s, the power of the quenching machine is set to 60%, the current is 500A, the quenching stop position is 1.00mm, the cooling position is 200mm, the speed is 600mm / 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 workpie...

Embodiment 2

[0026] A sprocket heat treatment induction hardening process, 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 8s, the power of the quenching machine is set to 60%, the current is 500A, the quenching stop position is 1.00mm, the cooling position is 200mm, the speed is 600mm / min, quenching and cooling with HX-200 medium, using the spray 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 to 190°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. Soak the...

Embodiment 3

[0035] A sprocket heat treatment induction hardening process, 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 7s, the power of the quenching machine is set to 60%, the current is 500A, the quenching stop position is 1.00mm, the cooling position is 200mm, the speed is 600mm / 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 200°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 workpiece ...

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Abstract

The invention discloses a heat treatment induction hardening technique for a sprocket wheel. The heat treatment induction hardening technique adopts the following technical steps of inspecting; cleaning and drying; hardening; cleaning and drying; tempering; detecting and performing rust-resisting treatment. According to the heat treatment induction hardening technique, the technique is simple, environmental protection without pollution in the whole process is realized, the hardness, the strength and wear resistance of the sprocket wheel can be effectively improved, and the service life of the sprocket wheel is prolonged; in the hardening step, an HX-200 medium is adopted to cool, and a workpiece is enabled to be uniformly hardened; a uniform diaphragm is formed on the surface of metal, so that the workpiece is effectively protected from being cracked; and the carried quantity is little, the hardened workpiece does not need to be cleaned, and the medium does not need to be discharged. The heat treatment induction hardening technique is suitable for various materials; the adjustment for the concentration is avoided, so that the production cost is reduced; and energy is saved, so that environmental pollution is reduced, and economic benefits are increased.

Description

technical field [0001] The invention relates to a sprocket 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 product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/32C21D1/10C21D1/60
CPCC21D1/10C21D1/60C21D9/32Y02P10/25
Inventor 卢俊徐孙传蒋亚龙薛文奎王广忠张文泉宗勇彬
Owner XINGHUA DONGHUA GEAR
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