关键词: 9Cr18不锈轴承钢, 共晶碳化物, 温度, 熔速, 冷却条件, 变形量, 碳化物颗粒尺寸

Abstract: 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.

Key words: 9Cr18 Stainless Bearing Steel;Eutectic Carbide, Temperature, Melting Rate, Cooling Conditions, Deformation, Carbide Particle Size