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A kind of preparation method of high purity high manganese master alloy

A master alloy and purity technology, which is applied in the field of preparation of high-purity and high-manganese master alloys, can solve problems such as ineffective desulfurization, and achieve the effects of convenient operation, improved purity and high purity.

Active Publication Date: 2019-07-12
湖州久立永兴特种合金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, vacuum induction furnace melting cannot effectively desulfurize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a high-purity high-manganese master alloy, comprising the steps of:

[0031] (1) Break the vacuum of the vacuum induction furnace, put the raw material manganese metal, which accounts for 40% of the total charge, into the crucible in the vacuum induction furnace, and then vacuumize the furnace;

[0032] (2) Send power to the vacuum induction furnace. When the raw material manganese shows signs of melting, argon gas is injected into the induction furnace, and then the raw material pure iron is added into the crucible through the side feeding system; manganese is volatile in a vacuum state. Therefore, argon filling is carried out at the beginning of melting to lower the vacuum pressure, and argon filling makes the pressure in the furnace reach 7000Pa.

[0033] (3) Add metal aluminum accounting for 1% of the total load to deoxidize molten steel;

[0034] (4) After the metal material is completely melted, enter the refining stage, and turn on the el...

Embodiment 2

[0049] The difference from the above-mentioned embodiment is that the raw material manganese, raw material pure iron, metallic aluminum, metallic cerium and silicon-calcium charged in the vacuum induction furnace are respectively 58%, 40.05%, and 1.2% of the total charged capacity of the vacuum induction furnace. %, 0.6% and 0.15%. The refining temperature of the vacuum induction furnace is 1450 degrees, and the tapping temperature of the vacuum induction furnace is 1510 degrees. Melting enters the steady state stage, the current is controlled at 9010A, and the voltage is controlled at 42V. The S content in the obtained master alloy is ≤0.003%.

Embodiment 3

[0051]The difference from the above-mentioned embodiment is that the raw material manganese, raw material pure iron, metallic aluminum, metallic cerium and silicon-calcium charged in the vacuum induction furnace are respectively 50%, 48.7%, and 0.8% of the total charged capacity of the vacuum induction furnace. %, 0.4% and 0.1%. The refining temperature of the vacuum induction furnace is 1450-1550 degrees. The S content in the obtained master alloy is ≤0.002%.

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Abstract

The invention belongs to the steelmaking field, and specifically relates to a preparation method for high-purity high-manganese intermediate alloy. The preparation method comprises the steps of casting an electrode in a vacuum induction furnace, adding active metal in the smelting process of the vacuum induction furnace for deoxidization and desulfuration, and remaining in an induction electrode in the form of inclusions. An electrode bar is subjected to remelting and washing through an electroslag remelting furnace, and the purity of the intermediate alloy is further improved. The S content of the final intermediate alloy materials of the induction electrode is no more than 0.003%, and the Mn content is 40%-60%; and the Fe content is 40%-60%. The intermediate alloy prepared with the preparation method can be applied to smelting of steel with the Mn content of no less than 1.00% and the S content of no more than 0.001% in the vacuum induction furnace.

Description

technical field [0001] The invention belongs to the field of steelmaking, and in particular relates to a preparation method of a high-purity high-manganese master alloy. Background technique [0002] Under the background of severe environmental protection and energy structure adjustment, the development of my country's nuclear power products is facing great opportunities, especially with the gradual maturity of Hualong One, the third-generation nuclear power technology with independent intellectual property rights in my country. As a technical route of the fourth-generation nuclear power technology, fast reactors are in the process of research and development in all countries in the world, and relevant domestic institutions are also vigorously researching and developing related technologies. There is an alloy material for fast reactors. The process route requirement is vacuum induction + vacuum self-consumption smelting. The purity requirement is extremely high. The inclusio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C35/00C22C38/04C22C22/00C22C33/04C22C1/02
CPCC22C1/02C22C22/00C22C33/04C22C35/00C22C35/005C22C38/04
Inventor 朱雄明肖健杜雯雯鲁昕驰彭飞沈伟杰杨雪澜
Owner 湖州久立永兴特种合金材料有限公司