Method for smelting high manganese steel through vacuum induction furnace
A technology of vacuum induction furnace and high manganese steel, which is applied in the field of steelmaking
Pending Publication Date: 2021-04-27
HEBEI IRON AND STEEL
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Problems solved by technology
In short, among the currently disclosed technologies, there is no process technology for smelting high manganese steel in a vacuum induction furnace.
Method used
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Embodiment 1-6
[0022] Embodiment 1-6: The method for smelting high manganese steel in a vacuum induction furnace includes the steps of smelting preparation, furnace loading, vacuum heating, deoxidation and alloying, modification of inclusions, and steel pouring; the processes of each step are as follows.
[0023] (1) Smelting preparation: The target content of chemical composition of high manganese steel is (wt): C 0.6~1.5%, Si 0.3~1%, Mn8~30%, P≤0.01%, S≤0.01%, Cr 1.5~2.5% %, Mo 0.9-1.5%, La 0.005-0.010%, the balance is Fe and unavoidable impurities. The target contents of the high manganese steel chemical components described in each embodiment are shown in Table 1.
[0024] Table 1: Target content (wt%) of high manganese steel chemical components described in each example
[0025]
[0026] In Table 1, the balance of the chemical composition is Fe and unavoidable impurities.
[0027] Use aluminum oxide prefabricated crucible to knot the furnace lining; use pure iron to bake the furnac...
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The invention discloses a method for smelting high manganese steel through a vacuum induction furnace. The method comprises the steps of smelting preparation, charging, vacuum heating, deoxidation and alloying, inclusion modification and steel pouring. The method comprises the following steps that (1) smelting preparation is carried out, specifically, pure iron, chromium metal, high-carbon ferromanganese and electrolytic manganese are baked and dried; (2) charging is carried out, specifically, the dried pure iron, metal chromium, ferromolybdenum and the like are charged into a crucible, and iron ore, high-carbon ferromanganese, electrolytic manganese and rare earth are charged into a material dividing bin; (3) vacuum heating is carried out, specifically, vacuumizing is carried out to be less than or equal to 5Pa, and then heating is started until the steel and iron materials in the crucible are melted down; and (4) deoxidation and alloying are carried out, specifically, 250-300ppm of oxygen is supplied to the molten steel by using iron ore, argon is blown from the bottom for dephosphorization, high-carbon ferromanganese is added when P is less than or equal to 0.01 wt%, and primary deoxidation is carried out under stirring; after initial deoxidation is finished, aluminum is used for final deoxidation till oxygen is smaller than or equal to 15 ppm; and argon is filled after deoxidation, and electrolytic manganese and other alloy materials are added into molten steel in batches. The method is good in process reproducibility and high in ingot casting quality stability.
Description
technical field [0001] The invention relates to a steelmaking method, in particular to a method for smelting high manganese steel in a vacuum induction furnace. Background technique [0002] As a typical type of wear-resistant steel and low-temperature steel, high manganese steel is widely used in mines, machinery, pressure vessels and other fields; its metallurgical process is generally completed by electric furnace + refining, and this process can smelt Mn content below 14% For high manganese steel with more than 15% high manganese steel, there is no mature smelting process in China. The main reason is that it is difficult to add a large amount of manganese when operating with slag, and it is difficult to melt. Instability and other issues. [0003] Among the disclosed technologies, the patent application number CN201910942475.5 discloses a steelmaking method for the production of high manganese steel for low-temperature environments by electric furnace + LF + VD refining...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C21C5/52C22C33/06C22C38/02C22C38/38C22C38/22
CPCC21C5/5241C21C5/527C22C33/06C22C38/02C22C38/38C22C38/22C22C38/005Y02P10/20
Inventor 张福利徐于斌王博祥王育飞李瑞杰张灿赵培义齐紫阳
Owner HEBEI IRON AND STEEL