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An electric pulse treatment method for improving the anti-powdering performance of Al-Silicon-Mn-Ferroalloy

A technology of Al-Si-Mn-Fe and its processing method, which is applied in the field of improving the structure and properties of alloys, can solve problems such as affecting product performance and life, and achieve the effects of improving the powdering resistance, optimizing the solidification structure of the alloy, and simplifying the equipment.

Active Publication Date: 2021-02-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, the demand for high-purity composite alloys such as low-phosphorus, low-carbon, high-purity silicon-manganese alloys, and ferromanganese nitride has been increasing. However, such alloys generally have the problem of natural pulverization. The problem is the most serious. The solid alloy can be completely pulverized in about a week, and even within a few days, which seriously affects the performance and life of the product.

Method used

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  • An electric pulse treatment method for improving the anti-powdering performance of Al-Silicon-Mn-Ferroalloy
  • An electric pulse treatment method for improving the anti-powdering performance of Al-Silicon-Mn-Ferroalloy
  • An electric pulse treatment method for improving the anti-powdering performance of Al-Silicon-Mn-Ferroalloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1) Raw material preparation: 59.6g of high-purity aluminum pellets, 12.34g of high-purity manganese flakes, 14.3g of high-purity silicon block, 11.42g of high-purity ultra-fine GR iron powder, 200g of silicon-manganese alloy, and the raw materials need to be stored in a drying oven at 80°C Bake for two hours, weigh the mass after cooling.

[0054] 2) Electric pulse equipment parameter setting: Before the experiment, set the electric pulse power supply parameters, set the peak voltage to 20V, the pulse width to 100μs, the pulse frequency to 90Hz, and the pulse action to 10 minutes.

[0055] 3) Electric pulse electrode adjustment: Before the experiment, adjust the position of the electric pulse electrode, insert the electrode into the crucible in the induction furnace, and set the insertion depth to 10cm through the turntable on the electrode fixing / moving frame, and set it on the electrode fixing / moving frame Adjust the distance between the two electrodes with the horizo...

Embodiment 2

[0060] 1) Raw material preparation: 59.6g of high-purity aluminum pellets, 12.34g of high-purity manganese flakes, 14.3g of high-purity silicon block, 11.42g of high-purity ultra-fine GR iron powder, 200g of silicon-manganese alloy, and the raw materials need to be stored in a drying oven at 80°C Bake for two hours, weigh the mass after cooling.

[0061] 2) Electric pulse equipment parameter setting: Before the experiment, set the electric pulse power supply parameters, set the peak voltage to 30V, the pulse width to 100μs, the pulse frequency to 90Hz, and the pulse action to 10 minutes.

[0062] 3) Electric pulse electrode adjustment: Before the experiment, adjust the position of the electric pulse electrode, insert the electrode into the crucible in the induction furnace, and set the insertion depth to 10cm through the turntable on the electrode fixing / moving frame, and set it on the electrode fixing / moving frame Adjust the distance between the two electrodes with the horizo...

Embodiment 3

[0067] Other conditions are the same as in Example 2, except that in step 5), after 10 minutes of electric pulse treatment, the electrodes and crucible are taken out, and the crucible is placed in flowing argon, and cooled at a rate of 100K / s. Al-Si-Mn alloy was obtained. It weighs 297.88g, which is recorded as the original weight.

[0068] The obtained alsilicon-manganese ferroalloy was placed in a drying dish, and the storage condition of the alloy was observed after 45 days. Because the powder is less, the pulverization rate is calculated by weighing the mass of the block (289.96g); 100%-(block mass / original weight)=2.64%.

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Abstract

The invention discloses an electrical pulse treatment method for improving chalking resistance of an aluminum ferro silicon manganese alloy. The mass percentage of each chemical component in the aluminum ferro silicon manganese alloy is that 49-51% of Mn, 19-21% of Al, 17-20% of Si, 5-14% of Fe and the balance of impurity elements such as carbon. The alloy preparation process comprises the following steps of (1) weighing each raw material according to designed components; (2) adding each raw material to be smelted according to a designed sequence; (3) when all raw materials are melted, switching off an induction furnace power supply; and meanwhile, inserting two pure ferro electrodes connected with an electrical pulse power supply into a high temperature molten pool; and applying high-energy density pulse current to the interior of the molten pool; and (4) after 5-10 minutes of electrical pulse treatment, cooling the molten pool to obtain the aluminum ferro silicon manganese alloy. Theproduct obtained by the electrical pulse treatment method for improving the chalking resistance of the aluminum ferro silicon manganese alloy has the advantages of smaller grain size, compact alloy structure, stable structure, excellent chalking resistance and long alloy storage period. Requirements of a deoxidizing agent for steel making are met.

Description

technical field [0001] The invention relates to the technical field of improving alloy structure and performance, in particular to an electric pulse treatment method for improving the anti-powdering performance of Al-Silicon-Manganese-Fe alloy. The alloy can be used for deoxidation and alloying of molten steel. Good compactness, high added value, stable properties and long storage period. Background technique [0002] Manganese-based alloys are used as composite deoxidized master alloys in the steelmaking process to enhance the control of the quantity and content of impurity elements in manganese-based alloys, improve the structure and properties of alloys, and develop high-purity manganese-based alloy products to improve the quality of various steel products. has far-reaching significance. [0003] In recent years, the demand for high-purity composite alloys such as low-phosphorus, low-carbon, high-purity silicon-manganese alloys, and ferromanganese nitride has been increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C22/00C22C30/00C22C1/03B22D27/02C22F3/02
CPCB22D27/02C22C1/03C22C22/00C22C30/00C22F3/02
Inventor 王万林张同生曾杰应国民薛利文朱晨阳黄道远李祖敏张朝晖郑光军谢应井戴诗凡覃华军黄珠范森荣
Owner CENT SOUTH UNIV
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