High temperature solid bearing steel ball production technology

- Apr 26, 2018 -

High temperature solid bearing steel ball is bound to have certain high temperature hardness and high temperature wear resistance. When high-temperature solid bearing steel balls are used, attention should be paid to high-temperature contact fatigue strength, oxidation resistance, impact resistance, and high-temperature dimensional stability. Such steel balls will use some steel grades of high-speed steel and high chromium martensitic stainless steel.

For our country's high temperature solid bearing steel ball, it should be noted that the main should also have 9Cr18Mo (260 °C), Cr4Mo4V (315 °C), Cr14Mo4 (480 °C), W6Mo5Cr4V2 (480 °C), W9Cr4V2Mo (520 °C), W18Cr4V (560°C), W12Cr4V5Co5 (590°C), of which Cr4Mo4V is most commonly used. The tempering temperature of the high carbon chromium shaft in this type of bearing steel is 160-180°C, so the use temperature is generally not more than 120°C.

For high-temperature solid bearing steel balls, when the service temperature exceeds 120°C, the strength of the steel sharply decreases, the dimensional stability also becomes unstable, and the bearing fatigue strength decreases. Therefore, only high-temperature bearing steels can be used instead of high-carbon chromium bearing steels. If the power of this aircraft turbojet engine is increasing, the high-temperature solid bearing steel balls used in the main bearings of compressors and turbines require high temperature resistance. The operating temperature is generally 55-260°C, and the higher ones can reach 370°C. Under this working condition, only high-temperature bearing steels can be used.

If the solid bearing ball is medium carbon bearing steel. This time is to pay attention to the carbon bearing steel is also referred to as the carbon steel alloy, in our country, the main current is that it will include 55,50 MnA, 70 Mn, 5 Cr MnMo, 60 Cr MnMoA, 55 Si MoVA, 50 SiMo, the latter two Steel is an impact bearing steel developed in China. Used as a ball with outstanding wear resistance.

The production of such steel grades with solid bearing steel balls will in fact be very suitable for the production of oversize bearings for heavy equipment such as excavation, lifting, and large-scale machine tools. Generally, the rotational speed is not high but it is subject to large axial loads. Radial load and bending stress. And when the solid bearing steel ball is used, it can effectively maintain the above equipment.