Preparation method of high manganese steel

Abstract

The invention discloses a preparation method of high manganese steel. The preparation method comprises the following steps: waste steel is heated for melting; oxygen is introduced by 5-10 minutes, the furnace temperature is kept above 1550 DEG C, and the quantity of furnace slag is not lower than 2%; one part of the furnace slag is pushed out, electrolytic manganese, pig iron, high carbon ferromanganese and low carbon ferrochromium are added for melting, and 60% aluminum-20% silicon and 20% calcium alloys by the total quantity of molten steel are added for deoxidation after melting; 1% carbon-50% silicon-49% calcium composite powder by the total quantity of molten steel is spread in the furnace slag of the molten steel for keeping by 5-10 minutes, and argon for heating and dehydration is introduced for keeping by 5-10 minites; and the molten steel is poured in a braked ladle, yttrium base rare earth is preset at the bottom of the ladle, the tapping temperature is 1460-1500 DEG C, the pouring temperature is 1370-1390 DEG C, and the high manganese steel is obtained through solidification cooling. The preparation method of the high manganese steel improves the metallurgy quality of the high manganese steel, reduces the oxygen content, and is suitable for manufacturing of rolled mortar walls, crushed walls, jaw plates, hammer heads, plate hammers, side plates, chain plates and the like.

Description

technical field [0001] The invention relates to a preparation method of high manganese steel. Background technique [0002] High manganese steel materials have been developed for more than 100 years and are often used in impact abrasive wear conditions. However, due to the high manganese content of high manganese steel (11~26%), it is easy to cause high content of inclusions and gases during the preparation process of high manganese steel, such as smelting and casting, and the oxygen content is generally about 200ppm, so that the performance of high manganese steel is greatly improved reduced, taking Mn13 as an example, σ b 600~700MPa, α kv 70~120J / cm 2 , affecting the service life of high manganese steel. Therefore, improving the metallurgical quality and performance of high manganese steel by improving the preparation method of high manganese steel is one of the research directions of high manganese steel. [0003] CN1320148C discloses a high-manganese steel smelting ...

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Problems solved by technology

[0006] The degree is large, the production efficiency is low, and the Mn x o y , Fe x o y 、Cr x o y When the oxides enter the slag, Mn, Fe, and Cr cannot be reduced and returned to the molten steel, resulting in a large material loss, and the cleanliness of the molten steel cannot be guaranteed in the subsequent tapping and pouring process.