Multi-electrode electroslag remelting device and electroslag remelting process for high-nitrogen austenitic stainless steel

Abstract

The invention discloses a multi-electrode electroslag remelting device and an electroslag remelting process for high-nitrogen austenitic stainless steel, belongs to the technical field of electroslagremelting, and solves the technical problems that high-nitrogen austenitic stainless steel electroslag remelting equipment is expensive and the operation process is tedious. Nitriding alloys, low-carbon steel, manganese steel and other alloy materials with different elements and different contents are adopted, a plurality of electrode bars with the same length and different diameters are preparedin combination with calculation of the component proportion and the mass fraction of an electroslag ingot, and electroslag remelting of the high-nitrogen austenitic stainless steel is conducted. According to the multi-electrode electroslag remelting device and an electroslag remelting process, alloy elements of different electrode bars can enter a molten pool behind an electroslag layer simultaneously in a molten state according to a certain proportion in a normal pressure or high pressure state, and the components of the alloy elements of the molten pool at different heights before solidification are uniform; and meanwhile, alloying of the nitrogen element is stable in the solidification process, escape and segregation of nitrogen are less, the high content and homogenization of nitrogenare improved to a great extent, and the use performance of the high-nitrogen austenitic stainless steel electroslag steel ingot is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of electroslag remelting, and in particular relates to a multi-electrode electroslag remelting device and an electroslag remelting process for high-nitrogen austenitic stainless steel. Background technique [0002] High-nitrogen austenitic stainless steel, due to the synergistic effect of high content of nitrogen and other alloying elements, makes it have high strength, good toughness and high corrosion resistance. It is used in transportation, aerospace, marine engineering and military industries, etc. fields are widely used. However, during the smelting and solidification process of high-nitrogen austenitic stainless steel, in order to prevent the precipitation of nitrogen, it is necessary to use higher pressure or rapid cooling to achieve rapid solidification of molten steel. The current industrial smelting method is mainly the pressurized electroslag remelting process. , but the pressure electroslag rem...

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Problems solved by technology

[0003] In order to overcome the deficiencies of the prior art and solve the technical problems of expensive high-nitrogen austenitic stainless steel electroslag remelting equipment and cumbersome operating techniques, the present invention provides a multi-electrode electroslag remelting device and electroslag remelting device for high-nitrogen austenitic stainless steel Slag remelting process

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