Ultralight bearing heat treatment process

A process and bearing technology, which is applied in the field of heat treatment of ultra-light bearings, can solve the problems of product grinding shape and position tolerance, multiple scraps and defective products, and achieve the effect of reducing quenching deformation, improving production efficiency and avoiding deformation.

Inactive Publication Date: 2016-02-10
CHANGSHU CHANGZHOU BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, during the quenching process of ultra-light bearings, large radial deformation and warping deformation of the end face will occur. If these two deformations cannot be solved well, it will directly affect the shape and position tolerance of the product grinding process, resulting in more Waste and defective products

Method used

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  • Ultralight bearing heat treatment process

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Effect test

Embodiment 1

[0012] A heat treatment process for ultra-light bearings, including: quenching, cold treatment and tempering processes; when quenching, first raise the temperature to 650°C at a rate of 10°C / h, and preheat at 650°C for 15 minutes, and then The heating rate of 8°C / h is raised to 835°C for quenching and heat preservation. The time of quenching and heat preservation is 40 minutes, and then cooled with the furnace to below 160°C and then air-cooled.

[0013] A low-frequency vacuum quenching furnace is used for the quenching.

[0014] The cooling medium during the furnace cooling is 10° or 20° mechanical oil at 30°C to 60°C.

Embodiment 2

[0016] A heat treatment process for ultra-light bearings, including: quenching, cold treatment and tempering processes; when quenching, first raise the temperature to 670°C at a rate of 15°C / h, and preheat at 670°C for 10 minutes, and then The heating rate of 12°C / h is increased to 840°C for quenching and heat preservation. The time of quenching and heat preservation is 35 minutes, and then cooled to below 160°C with the furnace and then air-cooled.

[0017] A low-frequency vacuum quenching furnace is used for the quenching.

[0018] The cooling medium during the furnace cooling is 10° or 20° mechanical oil at 30°C to 60°C.

Embodiment 3

[0020] A heat treatment process for ultra-light bearings, including: quenching, cold treatment and tempering processes; when quenching, first raise the temperature to 660°C at a rate of 12°C / h, and preheat at 660°C for 12 minutes, and then The heating rate of 10°C / h is increased to 837°C for quenching and heat preservation. The time of quenching and heat preservation is 38 minutes, and then cooled with the furnace to below 160°C and then air-cooled.

[0021] A low-frequency vacuum quenching furnace is used for the quenching.

[0022] The cooling medium during the furnace cooling is 10° or 20° mechanical oil at 30°C to 60°C.

[0023] The invention discloses a heat treatment process for ultra-light bearings. By adding a preheating process before quenching, strictly controlling the heating rate, and slowly raising the temperature, deformation caused by uneven heating can be avoided, quenching deformation can be reduced, and dimensional stability can be improved. , At the same ti...

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Abstract

The invention discloses an ultralight bearing heat treatment process. The process comprises the steps of quenching, cold treatment and tempering, and is characterized by firstly increasing the temperature to 650-670 DEG C at a rate of temperature increase of 10-15 DEG C / h during quenching, carrying out preheating for 10-15 minutes at 650-670 DEG C, then increasing the temperature to 835-840 DEG C at a rate of temperature increase of 8-12 DEG C / h to carry out quenching holding for 35-40 minutes and carrying out discharging and air cooling after carrying out furnace cooling below 160 DEG C. By adopting the process, the deformation of thin-wall bearing rings can be reduced, the dimensional stability can be improved, the rework correction rate can be also reduced and the production efficiency can be improved.

Description

technical field [0001] The invention relates to the field of heat treatment technology, in particular to a heat treatment technology for ultra-light bearings. Background technique [0002] Bearings are an important part of modern mechanical equipment. Its main function is to support the mechanical rotating body to reduce the friction coefficient of the mechanical load during the transmission process of the equipment. [0003] Ultra-light bearings have the characteristics of thin, light and easy to disassemble, and have been well used in hydraulic and pneumatic devices. They are often used in rotating mechanisms such as planetary reducers. Today, with the rapid development of science and technology, while the precision of various products is getting higher and higher, the weight of the products is getting lighter and lighter, which undoubtedly brings huge development space for ultra-light bearings. [0004] At present, during the quenching process of ultra-light bearings, l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D9/40
Inventor 陈胜东
Owner CHANGSHU CHANGZHOU BEARING
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