Method of accurately controlling consumable electrode remainder in electroslag remelting

Abstract

The invention discloses a method of accurately controlling consumable electrode remainder in electroslag remelting, and the method comprises the following steps: (1) designing the consumable electrode remainder length as L remainder; (2) designing the false electrode lengths of the groups of consumable electrodes: the false electrode length L1 of the first group of consumable electrodes is equal to H arm- L remainder-delta H ingot-H slag, the false electrode length Ln of the nth group of the consumable electrodes is equal to L1-(n-1)*delta H ingot, in the formula, L remainder refers to the designed remainder length of the consumable electrode, H arm refers to the vertical distance from the bottom end of the cross arm to the soleplate when the cross arm reaches the lower limit, delta H ingot refers to the added height of the electroslag ingot when each group of consumable electrodes is smelted until the cross arm reaches the lower limit, and H slag refers to the thickness of the slag; and (3) remelting the electroslag. The method disclosed by the invention has such beneficial effects as accurately controlling the consumable electrode remainder length, improving the utilization rateof the consumable electrode, avoiding the quality accident of changing the electroslag ingot component caused by adding the false electrode in the furnace by mistake, reducing the smelting electric consumption and reducing the production cost of the electroslag ingot and the like.

Description

[0001] technical field [0002] The invention relates to an electroslag remelting process, in particular to a method for precisely controlling the remaining ends of consumable electrodes in electroslag remelting. Background technique [0003] The cost of consumable electrodes in electroslag remelting accounts for about 85% of the total cost of electroslag ingots, even as high as 95%. At present, the electroslag remelting method to produce high-quality large-scale steel ingots for large forgings usually adopts multi-electrode operation. The remaining length of the consumable electrode (ie the remaining head) is not easy to control, and the furnace mouth is in a high temperature and high flue gas environment, and the working environment is harsh. For a long time, the control of the residual electrode has been generally rough and even random, so that the residual electrode of the consumable electrode is as long as 300mm, or even longer. production cost. In addition, if the d...

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Problems solved by technology

[0006] The present invention aims to solve the problems of large error, high cost, poor adaptability and controllability, and difficulty in actual operation and control in the existing method for controlling the residual head of the self-consumable electrode, and provides a method for accurately controlling the self-consumable electrode in electroslag remelting. The method of consumable electrode excess head, which can accurately control the length of electrode excess head, has low investment, flexible process, strong adaptability and controllability, simple operation, can improve the utilization rate of self-consumable electrodes, and reduce the production of electroslag ingots cost

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