Smelting technology of alloyed high-manganese steel

Abstract

The invention discloses a smelting technology of alloyed high-manganese steel. The smelting technology comprises the following steps that a ferro-molybdenum alloy is fed into a furnace along with a steel material; the furnace charge is melted, dephosphorizing and decarbonizing are performed after the furnace charge is completely melted down, the furnace charge is kept boiling for at least 5 min after dephosphorizing and decarbonizing, then oxidizing slag is removed, and the furnace is supplemented with slag charge; then a silicon-manganese alloy and / or a medium-carbon ferromanganese alloy are / is added into the furnace for pre-deoxidation, and a ferrochromium alloy is added into the furnace and stirred after slag is formed; the ferrochrome alloy is heated in the furnace for at least 10 min, and the high-carbon ferromanganese alloy is added; finally, a reducing agent is added into the furnace, and a deoxidation and desulfurization process is performed; after smelting is finished, under the conditions of thin slag and good reducing atmosphere, a ferrovanadium alloy is added into the furnace and fully stirred for at least 5 min; and when the content of each element in the molten steel meets the requirement, tapping is performed to finish smelting of the alloyed high-manganese steel. According to the smelting technology, the mechanical performance of the high-manganese steel is improved, the metallographic structure of the high-manganese steel is improved, and the service life of a high-manganese steel frog is prolonged.

Description

technical field [0001] The invention belongs to the technical field of high manganese steel metallurgy, and in particular relates to a smelting process of alloyed high manganese steel. Background technique [0002] In recent years, with the continuous improvement of high-manganese steel product quality requirements, the performance of high-manganese steel frogs produced by conventional smelting processes can no longer meet the needs of the rapidly developing railway industry. Therefore, it is necessary to invent a new high-manganese steel The smelting process comprehensively improves the performance of high manganese steel to meet the needs of the railway industry. Alloying high manganese steel can further improve the mechanical properties and wear resistance of high manganese steel, thereby further expanding its application range; [0003] Alloyed high manganese steel (Mo-Cr-V) is applied to the railway industry due to its good mechanical properties and metallographic stru...

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Problems solved by technology

[0003] Alloyed high manganese steel (Mo-Cr-V) is applied to the railway industry due to its good mechanical properties and metallographic structure. If the alloyed high manganese steel (Mo-Cr-V) is smelted according to the traditional high manganese steel operation, it is difficult to guarantee the yield of the three alloys and the stability of the chemical composition of the finished product, resulting in higher cost of alloyed high manganese steel, and the product quality is not stable enough

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