Bearing Knowledge
What are the elements that affect the performance of bearing steel
release time：2021/11/8 15:04:50
1.Carbon: The higher the carbon content, the higher the hardness, but the worse its plasticity and toughness.
2.Sulfur: It is a harmful impurity in steel. When steel with high sulfur content is subjected to pressure processing at high temperature, it is easy to be brittle and is usually called hot brittleness.
3.Phosphorus: It can significantly reduce the plasticity and toughness of steel, especially at low temperatures, this phenomenon is called cold brittleness. In high quality steel,
sulfur and phosphorus should be strictly controlled.However, from another point of view, the inclusion of higher sulfur and phosphorus in low carbon steel can make it easy to cut,
which is beneficial to improve the machinability of steel.
4.Manganese: It can improve the strength of steel, can weaken and eliminate the adverse effects of sulfur, and can improve the hardenability of steel, high alloy steel with high manganese
content (high manganese steel) has good wear resistance and other Physical properties.
5.Silicon: It can increase the hardness of steel, but the plasticity and toughness are reduced. The steel used in electrical engineering contains a certain amount of silicon,
which can improve the soft magnetic properties.
6.Tungsten:It can improve the red hardness and heat strength of steel, and can improve the wear resistance of steel.
7.Chromium:It can improve the hardenability and wear resistance of steel, can improve the corrosion resistance and oxidation resistance of steel.
8.Vanadium:It can refine the grain structure of steel, improve the strength, toughness and wear resistance of steel. When it is melted into austenite at high temperature,
it can increase the hardenability of steel; on the contrary, when it exists in the form of carbide, it will reduce its hardenability.
9.Molybdenum: It can obviously improve the hardenability and heat strength of steel, prevent temper brittleness, improve remanence and coercivity.
10.Titanium:It can refine the grain structure of steel, thereby improving the strength and toughness of steel. In stainless steel, titanium can eliminate or reduce the intergranular corrosion of steel.
11.Nickel:It can improve the strength and toughness of steel and improve hardenability. When the content is high, it can significantly change some physical properties of steel and alloy and
improve the corrosion resistance of steel.
12.Boron: when the steel contains a trace amount of ( 0.001 - 0.005 %) boron, the hardenability of the steel can be doubled.
13.Aluminum: can refine the grain structure of steel and suppress the aging of low carbon steel. Improve the toughness of steel at low temperatures,
and also improve the oxidation resistance of steel, improve the wear resistance and fatigue strength of steel.
14.Copper: Its outstanding role is to improve the atmospheric corrosion resistance of ordinary low alloy steel, especially when combined with phosphorus.