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公开了一种P91电渣钢表面裂纹的控制方法。该控制方法主要包括以下步骤:控制电渣重熔过程中自耗电极的熔化速度以及结晶过程中的水冷强度;将电渣钢快速出炉至缓冷坑,从出炉至进入缓冷坑的总时间≤6min;用缓冷介质将电渣钢迅速掩埋在缓冷坑中进行缓冷,电渣钢表面的缓冷介质厚度≥80mm,缓冷时间为73～87h,当电渣钢的温度≤150℃时,将电渣钢吊出缓冷坑;将缓冷后的电渣钢在48h以内进行退火处理,将电渣钢在≤300℃时装炉,以45～55℃/h的加热速
Discloses a method for controlling surface crack of P91 electroslag steel. The control method mainly comprises the following steps: controlling the melting rate of the consumable electrode and the water-cooling intensity in the crystallization process in the electroslag remelting process; rapidly discharging the electroslag into the slow cooling pit, The time is less than 6min; the slow cooling medium is used to slowly fill the electro-slag steel in the slow-cooling pit with slow cooling medium, the slow cooling medium thickness is ≥80mm on the surface of the electro-slag steel and the slow cooling time is 73~87h; 150 ℃, the electroslag was hoisted out of the slow cooling pit; the slow cooling of the electroslag was annealed within 48h, the electroslag steel in ≤ 300 ℃ fashion furnace to 45 ~ 55 ℃ / h heating rate