Hot processing technology method for bearing steel parts

A process method and hot processing technology, applied in the direction of manufacturing tools, heat treatment equipment, heat treatment process control, etc., can solve the problems of difficulty in manufacturing and guaranteeing performance and quality, unable to meet the performance requirements, etc., and achieve uniform spheroid structure refinement and carbonization. The effect of particle reduction and service life improvement

Active Publication Date: 2019-03-29
LUOYANG BEARING RES INST CO LTD
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Problems solved by technology

Although the bearing steel parts produced by the conventional thermal processing process of bearing steel have high performance, they often encounter situations in which they cannot meet the performance requirements of bearing steel under high temperature conditions. The manufacture of parts and the guarantee of performance and quality cause difficulties. Therefore, it is of great significance to optimize the thermal processing process of bearing steel parts to improve the performance of bearing steel parts after thermal processing.

Method used

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  • Hot processing technology method for bearing steel parts

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Embodiment

[0032] A thermal processing method for bearing steel parts, comprising the following steps:

[0033] Step 1. Billet forging

[0034] Put the billet into a medium frequency induction heating furnace and heat it to 1100°C for 10 minutes, then forge the billet on a ring rolling machine into a ring-shaped part of φ100×φ86×25mm, control the forging ratio to 1.8-2.8, and start the forging temperature not lower than 1050°C, the final forging temperature is higher than 950°C;

[0035] Step 2. Cooling after forging

[0036]Put the forged part into the cooling medium immediately after forging, and cool it to the surface temperature of the part at a cooling rate of 50 °C / s to 650 °C, so that the austenite in the part is transformed into fine pearlite particles; then the part is Take it out of the cooling medium, and let the part air cool to 400°C to eliminate the temperature difference between the inside and the surface of the part, and make the distribution of pearlite particles in th...

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Abstract

The invention relates to a hot processing technology method for bearing steel parts. The hot processing technology method for the bearing steel parts comprises the steps of forging a blank, cooling after forging, keeping warm, spheroidizing annealing, quenching and tempering after machining. Through optimal control on the cooperation in the multiple steps, the carbide particles in the manufacturedbearing steel parts are fine, the quantity of the carbide particles is more, and the grain size can be further improved, so that the strength, the impact toughness, the hardness uniformity and the service life of the parts can be improved, the overall performance of the bearing steel parts is improved extensively, and the hot processing technology method for the bearing steel parts can meet the use performance requirement on bearing steel under the working condition of high temperature in the field such as bearings, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the field of thermal processing technology, in particular to a thermal processing method for bearing steel parts. Background technique [0002] Bearing steel is used to manufacture balls, rollers and bearing rings. It has high and uniform hardness and wear resistance, as well as high elastic limit. It is mainly used in bearings and other fields. Usually, the chemical composition of bearing steel is uniform It is one of the most stringent steel types in all steel production and is an important mechanical performance material. In order to ensure the performance of bearing steel, the bearing steel must be thermally processed. In the conventional thermal processing process of bearing steel, the billet is usually forged first, and after the forged parts are cooled, the parts are annealed, and then Machining the parts, and then quenching and tempering the machined parts completes all thermal processing. Although the bearing steel p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/00C21D1/32C21D1/18C21D11/00C21D1/56B21J1/06
CPCB21J1/06C21D1/18C21D1/32C21D1/56C21D8/005C21D11/00
Inventor 扈林庄雷建中王姗姗郭浩刘传铭王浩程彬杨柳
Owner LUOYANG BEARING RES INST CO LTD
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