Rolling and cogging method for OCr17Ni4Cu4Nb casting ingots
A production method and ingot casting technology, applied in the direction of metal rolling, etc., can solve the problems of long production cycle and low metal billet rate, and achieve the effects of shortening the production cycle, high metal billet rate, and reducing metallurgical manufacturing costs
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[0021] A certain iron and steel company implements the patent of the invention, adopts a soaking furnace to heat electroslag ingots (ingot weight 1.5-2.8 tons, 2.3 tons) + preliminary rolling mill (Φ800 rolling mill) hot-processed billet, and produces 0Cr17Ni4Cu4Nb steel billet (180 square meters mm, 220 square mm). During the first fire rolling of the blooming mill, the electroslag ingot is heated by the soaking furnace: (A) the electroslag ingot (single weight 2 tons, 2.3 tons) is hot sent to the soaking furnace, the temperature of the steel ingot is 700°C, and the temperature is kept for 0.5 hours ; (B) heat up to 900°C at a rate of 50-60°C / h, and keep warm for 2 hours; (C) heat up to 1190°C at a speed of 100°C / h; (D) keep warm at 1190°C for 4 hours, and keep the steel ingot Turn over one by one to reduce the temperature difference between the positive and negative sides of the steel ingot; (E) The temperature difference between the ne...
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