Q1:What Alloy Elements Are Often Contained In Rolling Bearing Steel? What Role Do They Play?

A:Contains carbon, chromium, manganese, silicon
Such as GCr15 high carbon chromium bearing steel,
C: 0.95-1.05
Cr: 1.30-1.65
Mn: 0.20-0.40
Si: 0.15-0.35
Chromium mainly plays a role in improving the strength and hardness of steel, improving the high-temperature mechanical properties of steel, improving the corrosion resistance and oxidation resistance of steel, preventing carbon graphitization in steel, and improving hardenability.
However, if the content is too high, the brittle transition temperature of the steel will be significantly increased, and the temper brittleness of the steel will be promoted.
Therefore, its content needs to be controlled within a certain range.

Manganese is a good deoxidizer and desulfurizer in the steelmaking process, which can increase the strength and hardness of steel, improve the hardenability of steel, and improve the hot workability of steel, but the increase in the amount of manganese will reduce the corrosion resistance and welding performance of steel .

Silicon is used as a reducing agent and deoxidizer in the steelmaking process, and silicon can significantly improve the elastic limit, yield point and tensile strength of steel. Combining silicon with molybdenum, tungsten, chromium, etc., can improve corrosion resistance and oxidation resistance. However, the increase in silicon content will reduce the weldability of steel.

Q2:What is the function of the steel ball in the bearing?

A:The role of supporting the rotating body, while reducing frictional resistance, 5-10 times smaller than sliding frictional resistance, dripping lubricating oil further reduces frictional resistance, reduces wear, heat dissipation, and prolongs service life.

Q3:What are the main properties and functions of spindle bearing oil?

A:Spindle bearing oil is a special lubricating oil for the spindle bearings of precision machine tools and similar equipment. It plays a very important role in ensuring the working accuracy and performance of the spindle and prolonging its service life. It is also called bearing oil.
Its main performance:

1. Appropriate viscosity and good viscosity-temperature characteristics In order to prevent the temperature of the machine tool spindle from being too high, causing thermal deformation of the machine tool, affecting the machining accuracy or causing poor lubrication of the bearing, the suitable temperature should be selected according to the spindle bearing structure, speed and bearing clearance. The lubricating oil is also required to have good viscosity-temperature characteristics, so as to prevent its lubricating performance from being affected by excessive viscosity changes due to large changes in the operating temperature of the spindle and the ambient temperature.
2. Good lubricity is to maintain a uniform oil film between the spindle and the bearing contact surface, and the oil film will not be damaged when the spindle starts or stops to generate impact loads. Maintaining good lubricating performance can reduce friction and frictional heat. The role of reducing the temperature rise of the spindle and ensuring the machining accuracy requires good lubrication performance.
3. Good oxidation resistance When the machine tool spindle adopts the circulation lubrication method, the spindle bearing oil is required to be used for a long time without deterioration, so it is required to have good oxidation resistance.
4. Good rust resistance Since the oil will inevitably be mixed with condensed water in the air or machine tool coolant during the working process of the spindle lubrication system, the oil product is required to have good rust resistance.

Q4:The main function of bearing super precision

A:

1. Improve the surface roughness of the bearing and reduce the running noise;
2. Remove grinding defects and metamorphic layers to improve bearing life;
3. Repair roundness and shape accuracy, improve bearing accuracy;
4. Form a reasonable silk road and enhance the lubrication ability;
5. Cold working stress processing can form compressive stress on the surface of the raceway and improve the service life of the bearing.