We can provide free samples . Please contact Email for any inquiries

A, the chemical composition of strict requirements in general bearing steel high carbon chromium bearing steel, the carbon content 1% the left and right sides, add 1.5% chromium, and contains a small amount of manganese and silicon hypereutectoid steel.Chromium heat treatment can improve performance, increase the hardenability, uniformity, tempering stability, and can improve the anti-corrosion properties of steel and grinding performance.But when the chromium content more than 1.65%, after quenching can increase the retained austenite in the steel, reduce hardness and dimensional stability, increase the inhomogeneity of carbide lower impact toughness and fatigue strength of steel.To this end, the chromium content of high carbon chromium bearing steel general control under,65%1.Only strict control of the bearing steel chemical composition, can through the heat treatment process to satisfy the bearing performance of the organization and hardness.Second, the size of the high precision demands of rolling bearing steel steel dimension precision is higher, this is because most of the bearing parts, it takes pressure molding.In order to save material and improve labor productivity, the vast majority of bearing ring have been forging forming, steel ball is through cold heading or hot forming, small size of the roller is also through the cold heading forming.If the size of the steel precision is not high, will not be able to accurately calculate the expected size and weight, and cannot ensure the quality of bearing parts, also easy to cause damage of equipment and dies.Three, particularly strict purity requirements of steel purity refers to contain nonmetallic inclusion in steel, the higher the purity, the less the non-metallic inclusions in steel.Harmful oxide and silicate inclusions in bearing steel bearing early fatigue is the main cause of peeling, significantly reduce the bearing life.Especially brittle inclusion most harmful, because in the process of peeling off easily from the metal substrate, seriously affect the quality of bearing parts after finishing surface.Therefore, in order to improve the service life and reliability of the bearing, must reduce the content of inclusions in bearing steel.