A kind of smelting method of low carbon high manganese steel

Abstract

The invention discloses a smelting method of low-carbon and high-manganese steel. Desulfurated molten iron is added into a converter, the end point carbon content is controlled to be 0.03-0.05%, the oxygen value of tapped steel is 400-500 ppm, and the temperature is controlled to be 1660-1680 DEG C; the temperature when molten steel enters an RH furnace is larger than 1610 DEG C, and decarburization is carried out till the carbon content is below 0.01%; the molten steel processed by the RH furnace is added into the converter, and before the molten steel is added, a mixture of manganese metal and aluminum metal is added into the converter so that alloying of manganese can be conducted; after the molten steel is added, the converter is rocked, a burning torch is put and ignited, steel is discharged after alloy in the converter is wholly molten, and the temperature is controlled to be 1600 DEG C or over; and after the steel enters an LF, if the temperature is lower than 1530 DEG C, the temperature is increased to be over 1530 DEG C firstly, and then alloying of manganese can be carried out, and the temperature when the steel is carried out of the LF is larger than 1500 DEG C. By means of the smelting method, the final manganese content in steel can be controlled to be 15-20% stably, the carbon content is controlled to be below 0.05%, and the problem that the low-carbon and high-manganese steel cannot be produced through conventional converters or refining is solved.

Description

technical field

[0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for smelting low-carbon high-manganese steel. Background technique

[0002] With the increasingly fierce competition of steel products, more high value-added products have been developed, and more high manganese steel has been valued and applied. Generally speaking, high manganese steel is used in the fields of wear resistance, impact resistance and high hardness. Therefore, there are high-carbon and high-manganese steels such as TWIP steel for automobiles, and there are also wear-resistant steels such as Mn13, or steels that add B on the basis of Mn13 or further increase C and Mn. These all belong to the category of high-carbon and high-manganese steels. . There are also some steels with damping properties such as Fe-Mn or Fe-Cr steels. Taking Fe-Mn as an example, they belong to the category of low carbon and high manganese. These steels can obtain spec...