BACKSeamless steel pipe
GR15 bearing casing
Description:Bearing steel for the production of bearing steel pipe has the following types of bearing special steel (marked with G for "roll") : chromium bearing steel such as GCr6, GCr9 (SiMn), GCrl5 (SiMn); No chromium bearing steel such as GSiMnV (Re), GSiMnMoV (Re), GMnMoV (Re); Carburized bearing steel such as G20CrMo, G20Cr2Mn2Mo; High carbon chromium stainless bearing steel such as 9Cr18 (Mo).
parameters
The production of bearing steel pipe refers to the refining of bearing steel, bearing steel and non-chromium bearing steel and non-chromium bearing steel. Pipe production for making bearing rings. Bearing steel pipe is a high size and precision pipe, which is produced by two - and three-roll diagonal rolling extension machine (see pipe diagonal rolling extension) in hot rolling. Smaller specifications need to be produced by cold rolling and cold drawing. Using long steel pipe instead of single forging or round steel turning to produce bearing sleeve can save metal, simplify bearing manufacturing process and reduce the cost of bearing.
introduction
Gr15 bearing steel pipe smelting quality requirements are very high, the need to strictly control the content of sulfur, phosphorus, hydrogen and non-metallic inclusions and carbide quantity, size and distribution, because the non-metallic inclusions and carbide quantity, size and distribution of Gr15 bearing steel pipe has a great impact on the service life, The failure of bearings is usually caused by the propagation of microcracks around large inclusions or carbides. The content of inclusions is closely related to the content of oxygen in steel. The higher the content of oxygen, the more inclusions and the shorter the life. The larger the particle size and distribution of inclusions and carbide are, the more uneven their distribution is, and the shorter their service life will be. Their size and distribution are closely related to the smelting process and smelting quality used. The main production processes of bearing steel are continuous casting and electric furnace smelting + electroslag remelting process smelting. There are also a small number of vacuum induction + vacuum self-consumption double vacuum or + multiple vacuum self-consumption technology to improve the quality of Gr15 bearing steel pipe.
