The φ300~350 mm high quality heavy round sections of GCr18Mo high Carbon Chromium bearing steels have been succsssfilly produced by hot metal +scap-60 tare fnmace-LF-RH-5 tingo casting-hot rolling/ hotfog. ing process at Daye Special Steel.Results showed that with the process measures such as hot metal chare rtio 30~60%%. controlling deleterious residual elements in scrap and alloy matenals

LF refining. RH yacwm treament.sott Arblowing amd Ar gas shield casting

the As content in the high cleanlincss beayy ound seetions of CGr18Mo beaing steel wes 0.010%~ 0.012%

(As+Sn+Sb)0.022%～0.025%

Pb0.0007%~0.0011%

Ti(17～19)×10

-6

Ca3×10

-6

[0

]

(6.5~6.7)×10

-6

and rating of Agade inclusion was0.5~1.5

B gnde0~1.0

Cgnde0

and D gade 0.5~1.0.