徐亮, 李涛, 马永强, et al. Study on Process to Improve Eutectic Carbide of Stainless Bearing Steel 9Cr18[J]. Special Steel, 2022, 43(6): 46-49. DOI: 10.20057/j.1003-8620.2022-00150.
The effect of smelting and processing technology of 30 t EAF-LF-VD-Φ200 mm electrode-Φ360 mm ESR ingot- 120 mm×120 mm forging billet-Φ50 mm rolled bar on the eutectic carbide in stainless bearing steel 9Cr18 is analyzed by optical microscope.Tested results show that
reduce the molded electrode pouring temperature from 1500- 1510 ℃ to 1485- 1495 ℃
reduce the ESR melting speed from4.5 kg/min to3.5kg/min
strengthen the electroslag remelting cooling conditions can effectively reduce the eutectic carbide in the original form in process of smelting; and the large carbide particles can be broken
the particle size can be reduced
and the degree of carbide band and network aggregation can be reduced by the way of forging penetration and large deformation to effectively improve the eutectic carbide rating of stainless bearing steel and reduce the carbide particle size.