Practice of Optimizing and Improving the Non-uniformity of Carbides in Bearing Steel GCr15 for Rolling Elements
LI Xiangcai
CUI Jianhai
ZHANG Linlin
GUO Fajun
Abstract：Against the carbide band and network structure of GCr15 round steel used for rolling elements do not meet the standard requirements,by optimizing the composition control,the continuous casting process speed is reduced to 0.85 m/min,the superheat is controlled to 30-40℃,and the light pressing is pressed forward with a large pressing amount.The diffusion time of the heating high-temperature section during the rolling process is greater than or equal to 230 minutes.After rolling,the steel is cooled through water,and the temperature of the cooling bed on the round steel returns to a uniform temperature of 650-680 ℃.The above process is adopted to roll into different specifications of round steel with a diameter of 20-60 mm.The stability control of carbide band and network structure in bearing steel is maintained at 1.0-2.0 grades which meet the steel requirements for rolling elements of bearing steel.
Keywords：GCr15 Steelbearing steel for rolling elementscarbide band structurecarbide network structuresuperheat temperature
Publication Date：2025-04-25
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 14-16 )