Method for capping nickel and stainless steel continuous casting tail billet

Abstract

A method for capping a nickel and stainless steel continuous casting tail billet comprises the following steps: I. In a continuous casting process, when steel water in a tundish has 7.9 tons to 8.1 tons left, the casting speed is gradually reduced; II. In the process of when the steel water is reduced to 4.9 tons to 5.1 tons from 6.9 tons to 7.1 tons, the casting speed is kept unchanged; III. Whenthe steel water is reduced from 4.9 tons to 5.1 tons, residue dragging begins; IV. When the steel water is reduced from 3.9 tons to 4.1 tons, the casting speed is kept at 0.4 plus or minus 0.05m / min;V. When the steel water is reduced from 2.9 tons to 3.1 tons, residue dragging begins and water cooling is carried out, and the casting speed is reduced to 0.1 plus or minus 0.05m / min slowly; VI. When the steel water is reduced to 1.4 tons to 1.6 tons, the casting speed is kept at 0.1 plus or minus 0.05m / min; VII. Good capping is ensured, and the continuous casting speed is increased; and VIII. When a tail end of the continuous casting billet goes out of a mould, good capping is ensured again, and the speed is increased to pull the continuous casting billet out of a continuous caster. The method for capping the nickel and stainless steel continuous casting tail billet has safe operation and short capping time.

Description

technical field [0001] The invention relates to a capping method for nickel stainless steel continuous casting tail blank. Background technique [0002] The stainless steel continuous casting machine adopts the hydraulic smart segment (ASTC) and light reduction technology, and the width of the slab produced is relatively large, which brings difficulties to the final pouring and capping. The current capping method for the nickel stainless steel continuous casting tail billet is the traditional slow speed capping method, the capping time is long, and it is easy to cause the tail billet to rise during the capping process. Under the action of light pressure of the Suhe casting machine, molten steel emerges from the tail of the slab, seriously affecting normal production and equipment safety. Therefore, it is necessary to improve the capping method of the original nickel stainless steel continuous casting slab. Contents of the invention [0003] In order to overcome the above...

AI Technical Summary

Problems solved by technology

However, if the deceleration process is too short, it will lead to long shrinkage cavity of the tail blank, which will affect the yield of casting blank

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