Non-standard bearing steel smelting microscopic requirements

Microscopic request source: non-standard bearing steel smelting bearing | last updated: - 2020 10 - 27 of non-standard bearing steel smelting microscopic have stringent requirements of non-standard bearing steel smelting (institutions and microscopy at high magnification Low power) Agency rules of non-standard bearing steel high institutions is generally loose, loose management center and flat, microscope ( Low power) Institutions include steel quenching institutions, cementite mesh structure, belt strip and liquid chromatography, etc. Cementing fluid analysis harder and more brittle than its bad influence and ductility and sundry also. Network cementite reduce the fracture toughness of steel, and made it the agency is not symmetrical, very easy to deformation and crack during heat treatment. With strip cementite harm quenching and quenching heat treatment institution and touching fatigue limit. Low, the stand or fall of low power institutions could turn to the characteristics of non-standard bearing and have the very big harm, therefore, in the non-standard bearing raw material in the specification of low, low power agencies have strict rules. Read this article also browse: smelting non-standard bearing steel is there any requirement for non-standard bearing steel, surface defects including crack, flash, burr, scarring, scale, etc. Internal defects including shrinkage cavity, bubbles, small white dots, severe osteoporosis and shrinkage cavity, etc. This defect in production and processing of non-standard bearing, non-standard bearing properties and service life have very big harm, in the non-standard bearing raw material specification expressly provides that don't allow appear this kind of defect. Provisions in the non-standard bearing steel in which the inhomogeneity of cementite, if serious cementite distribute in the inhomogeneity, could easily lead to institutions in the process of heat treatment and intensity inhomogeneity, the nonuniformity of the steel body contact fatigue limit. In addition, the serious cementite asymmetrical sex is also very easy to make the non-standard bearing cracks during heat treatment of refrigeration parts, cementite asymmetrical sex will continue to reduce the service life of non-standard bearing, therefore, in material specifications of non-standard bearings, for different types of stainless steel plate are established by the provisions in particular.