How to choose taper roller bearing material?

A. Select taper roller bearing material according to the working conditions of the bearing

1. Operating temperature
Bearings operating at room temperature are made of chromium bearing steel. Chromium bearing steel is also used when the working temperature is higher than 150°C and lower than 250°C, but it requires special heat treatment (tempering at 200°C or 300°C is required).

2. Amount of impact load to withstand
Bearings that bear strong impact loads generally do not use chromium bearing steel. Most of them use high-quality carburized structural steel, impact-resistant tool steel or quenched and tempered structural steel.

3. Contact medium
Bearings used in corrosive media must be made of corrosion-resistant steel or alloy steel with good corrosion resistance.

B. Select taper roller bearing material according to bearing fatigue life and reliability requirements

Bearing fatigue life and reliability depend to a certain extent on the purity and structural uniformity of the steel. For general use, ordinary bearing steel smelted in acidic open furnaces or alkaline electric furnaces is often used. With the continuous improvement of smelting methods, new smelting methods such as current remelting, vacuum smelting, and electron beam furnace smelting have emerged. The service life of bearings made of bearing steel smelted by the above methods has also been improved accordingly. It is suitable for bearings with special requirements on fatigue life and reliability, such as railway vehicle axle box bearings, aircraft engine spindle bearings and navigation system bearings.

In addition, when selecting steel types, the processing performance, supply and domestic resources of steel should also be comprehensively considered.

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