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Heat treatment method of gear parts

A heat treatment method and a technology of parts, which are applied in the field of parts processing and can solve problems such as increasing the difficulty of processing

Active Publication Date: 2015-04-08
CHINA HANGFA SOUTH IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from the above that the existing heat treatment method increases the difficulty of subsequent treatment

Method used

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Embodiment Construction

[0018] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below in conjunction with examples.

[0019] The heat treatment method of tooth parts in this embodiment includes step S10 and step S20. Step S10: Determine whether the tooth parts are to be sleeved on the mold for carburizing and quenching. Step S20 includes step S21 and step S22. If the tooth parts need to be set on the mold for carburizing and quenching, go to step S21; if the tooth parts do not need to be set on the mold for carburizing and quenching, go to step S22. Step S21: The size of the gear span and the gear normal line of the toothed parts are greater than the corresponding standard value, and then the toothed parts are carburized and quenched; Step S22: The gear span and the gear normal line of the toothed parts are dimensioned are less than th...

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Abstract

The invention provides a heat treatment method of gear parts. The heat treatment method comprises the following steps: a step S10: determining whether the gear parts need to sleeve a mold for carburizing and quenching or not; and a step S20 comprising a step S21 and a step S22, if the gear parts need to sleeve the mold for carrying out carburizing and quenching, performing the step S21; if the gear parts do not need to sleeve the mold for carrying out carburizing and quenching, performing the step S22, wherein the step S21 comprises the steps of enabling the size of the gear span and the length of a common normal line of the gear of the gear parts to be greater than the corresponding standard values and carburizing and quenching the gear parts; and the step S22 comprises the steps of enabling the size of the gear span and the length of a common normal line of the gear of the gear parts to be less than the corresponding standard values and carburizing and quenching the gear parts. By the heat treatment method of the gear parts provided by the invention, the difficulty of subsequent treatment is decreased.

Description

technical field [0001] The invention relates to the technical field of part processing, in particular to a heat treatment method for tooth parts. Background technique [0002] Tooth parts are generally made of carburized steel, which requires the surface of the gear (spline) to be cyanided or carburized, and then quenched as a whole to obtain high hardness on the surface of the gear (spline). After quenching, the hardness is relatively low, and it has certain plasticity. That is to achieve the purpose of showing hard heart and toughness. [0003] During the carburizing (carbonitriding) quenching process, the parts will inevitably be deformed due to changes in temperature and structure, and the tooth shape and roundness will change. After quenching, the hardness of the teeth is very high, reaching above HRC60. According to the conventional method, the processing amount is reserved before heat treatment, and the heat treatment deformation is removed by grinding after heat tr...

Claims

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Application Information

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IPC IPC(8): C21D9/32C21D1/18C23C8/22C23C8/46C23C8/66
CPCC21D1/18C21D9/32C23C8/22C23C8/46C23C8/66
Inventor 范康燕文钰曹荣华
Owner CHINA HANGFA SOUTH IND CO LTD
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