High-purity manganese 18 high manganese steel and preparation method thereof

Abstract

The invention discloses high-purity manganese 18 high manganese steel which is prepared from the following components in percentage by mass: 0.80 to 1.80 percent of C, 15.0 to 22.0 percent of Mn, 0.3to 0.9 percent of Si, 0.012 to 0.045 percent of P, 0.02 to 0.04 percent of S, 0.03 to 3.5 percent of Cr, 0.05 to 2.8 percent of Mo, 0.02 to 2.5 percent of Ni, 0.06 to 2.3 percent of Cu, 0.014 to 0.096percent of Al, 0.0007 to 0.0013 percent of O, 0.0002 to 0.00045 percent of H, less than or equal to 0.94 percent of other trace element, and the balance Fe. According to the high-purity manganese 18high manganese steel provided by the invention, new slag is casted in the refining period, molten steel in a furnace can fully participate in a steel slag interface reaction, and through the double functions of argon purification and the steel slag full-reaction carried out on the molten steel, oxygen and hydrogen are fully removed, and occluded foreign substances are cleared, so that a synthesized mechanical property of the high manganese steel is improved.

Description

technical field [0001] The invention belongs to the field of high-performance new materials and metallurgy technology, and specifically relates to a high-purity manganese-18 high-manganese steel and a preparation method thereof. Background technique [0002] The purity of high manganese molten steel directly affects the quality of castings, and the amount of impurities such as oxides, inclusions, and gas content in high manganese molten steel directly affects the material properties. [0003] Oxygen is one of the elements with the most serious segregation tendency during the solidification process of steel. During the solidification and subsequent cooling process of molten steel, the solubility of oxygen drops sharply, and most of the original dissolved oxygen in steel is oxidized with iron oxide and sulfur These fine inclusions will cause grain boundary embrittlement, which will easily become the starting point of grain boundary cracking during the processing and use of ste...

AI Technical Summary

Problems solved by technology

[0011] At present, most of the domestic smelting equipment and processes adopt the non-oxidation smelting process, but the current system for refining high manganese steel has the following disadvantages: First, it cannot detect the washing degree of argon gas to the furnace lining during the purification process of high manganese molten steel. Second, when the molten high manganese steel leaks out of the furnace lining and conducts with the furnace shell, it cannot well avoid the occurrence of furnace accidents; the third is to purify the refined high manganese steel for oxygen and The effect of hydrogen is poor, which affects the quality of the product; Fourth, the quality of the breathable brick used in the refining system of high manganese steel is poor, which affects the effect of blowing argon, thereby affecting the purification effect of oxygen and hydrogen in the refined steel water

However, too much slag removal will cause secondary oxidation on the surface of molten steel, and at the same time, the temperature of molten steel will drop faster, and it will not solve the problems of slag being too sticky and impurities unable to float up and the ladle not sticking to slag. It only reduces the speed of sticking slag on the steel wall.

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