skf bearing balls classification introduced

Speaking of various machinery and equipment can not be said that the usefulness of the Roller bearing , but said it depends on the characteristics of the bearing components bearing components to support today to introduce the classification of steel ball bearings.

High chrome steel ball: 1) Ball smelting Methods: intermediate frequency electric furnace smelting, metal mold or sand casting and other modes of production, therefore, domestic manufacturers are often referred to as wear-resistant materials of high chromium alloy casting ball. 2) the ball is the main chemical element content: Cr (chromium) ≥ 10.0%; C (carbon) 1.80% -3.20%. 3) Ball hardness: HRC ≥ 58 degrees or more, if the hardness of this high chrome ball must use heat treatment and quenching process. 3) Ball range of applications: high-chromium steel balls are widely used in metallurgy, mining, cement, power generation, flue gas desulfurization, aerated concrete, magnetic materials, chemicals, coal slurry, pellets, slag, fine powder , fly ash, calcium carbonate, quartz sand and other industries. B. Chromium steel ball quality indicators: 1) the ball is the main chemical element content: Cr (chromium) 3.0% ~ 7.0%; C (carbon) 1.80% -3.20% chromium and carbon content of the chemical elements, are called of chromium steel balls. Impact value ak ≥ 2.0J / cm 2, the national standard in chrome steel ball hardness (HRC) must be ≥ 47 or more, in order to ensure the quality of the Cylindrical roller bearing steel ball ball requires the use of high-temperature tempering treatment (in order to achieve the purpose of eliminating casting stress), If the ball surface dark red indicates that the product has been tempered at high temperature, such as the surface of the ball still on metal color indicates that the product is not high temperature tempering. C. Low chrome steel ball quality indicators: 1) Ball smelting Methods: intermediate frequency electric furnace smelting, metal mold or sand casting methods produce, and therefore wear-resistant materials domestic manufacturers often referred to as low-chromium alloy casting ball. 2) the ball is the main chemical element content: Cr (chromium) ≤ 3.0%, C (carbon) 1.80% -3.30% 3) Ball hardness: HRC ≥ 45 degrees 4) Ball range of applications: low chromium steel ball is widely used in metallurgy, mining, cement, power generation, flue gas desulfurization, aerated concrete, magnetic materials, chemicals, coal slurry, pellets, slag, fine powder, fly ash, calcium carbonate, quartz sand IDM.