A kind of cast steel deoxidation alloy and its processing method and using method

A technology for deoxidizing alloys and cast steel, applied in the field of molten steel smelting, can solve problems such as poor use of deoxidizers and affect the performance of cast steel, reduce or eliminate free carbides, improve molten steel properties, and refine grains Effect

Active Publication Date: 2019-05-28
MAANSHAN RUIHUI ENTERPRISE
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Problems solved by technology

[0009] The purpose of the present invention is to overcome the disadvantages of poor use of deoxidizers in the prior art, which affect the performance of cast steel, and provide a deoxidized alloy for cast steel and its processing method and use method. This deoxidized alloy is suitable for casting ordinary carbon Cast steel such as steel, alloy steel and stainless steel can effectively reduce the oxygen content in cast steel, reduce the harmful effect of oxygen on the content of cast steel, and improve the quality of cast steel products

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  • A kind of cast steel deoxidation alloy and its processing method and using method

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Embodiment 1

[0038] A kind of cast steel deoxidation alloy of this embodiment comprises the following components according to mass percentage:

[0039] Re (rare earth): 20%, Ca: 15%, Ba: 10%, Ti: 15%, Zr: 15%, Si: 10%, Mg: 1.5%, and the balance is Fe.

[0040]The Re rare earth is light rare earth composed of lanthanum rare earth and cerium rare earth, and the mass percentage between lanthanum rare earth and cerium rare earth is 70% and 30% respectively; silicon, calcium, and barium are metal elements, and calcium, barium, silicon Combination elements have high-efficiency deoxidation and grain refinement effects in cast steel, and the oxygen-sulfur compounds generated in the molten steel are dispersed in a spherical shape. The inclusions in this form are beneficial to exclude and improve the performance of cast steel; and the three The contents are coordinated with each other, the calcium content is 1.5 times that of barium, and the calcium content is 1.5 times that of silicon. During deoxi...

Embodiment 2

[0053] A cast steel deoxidation alloy in this embodiment is basically the same as in Embodiment 1, except that the components of the deoxidation alloy in this embodiment include Re: 25%, Ca: 12%, and Ba: 8 by mass percentage. %, Ti: 18%, Zr: 15%, Si: 12%, Mg: 2%, and the balance is Fe.

[0054] Among them, Re rare earth adopts light rare earth composed of lanthanum rare earth and cerium rare earth, and the mass percentage between lanthanum rare earth and cerium rare earth is 75% and 25% respectively; the quality of Ca is 1.5 times of the quality of Ba, and the quality of Ca is the quality of Si 1 times that of Zr; the mass of Ti is 1.2 times that of Zr; the mass ratio of (Re+Mg):(Ca+Ba+Si):(Ti+Zr) is 1:1.2:1.2.

[0055] The processing method of deoxidation alloy in the present embodiment is as follows:

[0056] Step 1. Add steel scrap into the melting furnace, melt it for 15 minutes under 300KW power, then add 150 kg of ferrosilicon, after the ferrosilicon is melted, add 150 ...

Embodiment 3

[0063] A cast steel deoxidation alloy in this embodiment is basically the same as in Embodiment 1, except that the components of the deoxidation alloy in this embodiment include Re rare earth: 18%, Ca: 15%, Ba: 10% by mass percentage. %, Ti: 15%, Zr: 5%, Si: 10%, Mg: 2.5%, and the balance is Fe.

[0064] Wherein Re rare earth adopts yttrium-based heavy rare earth, and the mass percentage of yttrium rare earth in this heavy rare earth is greater than 90%, and the balance can be any rare earth; The quality of Ca is 1.5 times of the quality of Ba, and the quality of Ca is 1 / 2 of the quality of Si 1.5 times; the content of Ti is 3 times that of Zr; the mass ratio of (Re+Mg):(Ca+Ba+Si):(Ti+Zr) is 1:1.75:1.

[0065] The processing method of deoxidation alloy in the present embodiment is as follows:

[0066] Step 1. Add steel scrap to the melting furnace, melt it for 10 minutes under 200KW power, then add 100 kg of ferrosilicon, after the ferrosilicon is melted, add 100 kg of molten...

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Abstract

The invention discloses a cast steel deoxidized alloy and a processing method and a use method of the cast steel deoxidized alloy, and belongs to the field of cast steel molten steel smelting. The deoxidized alloy comprises, by mass percent, 15-25% of Re, 8-20% of Ca, 5-15% of Ba, 5-20% of Ti, 5-20% of Zr, 5-20% of Si, 0.5-3% of Mg and the balance Fe. The deoxidized alloy is prepared by adopting afusion casting method, the fusion casting method is suitable for casting ordinary carbon steel, alloy steel, stainless steel and other cast steel, the content of oxygen in the cast steel can be effectively reduced, the harmful effects of oxygen on the content of the cast steel are reduced, and the cast steel product quality is improved.

Description

technical field [0001] The invention belongs to the field of cast steel molten steel smelting, and more specifically relates to a cast steel deoxidized alloy, a processing method thereof and a use method thereof. Background technique [0002] As an important casting material, cast steel is increasingly widely used in national economic life, especially for rail transit steel castings, which have high requirements for the oxygen content and inclusions in cast steel materials. How to meet the increasing requirements of casting The quality of steel products, deoxidizers play a vital role. [0003] The harmful effect of oxygen on the quality of cast steel is caused by the disparity in the solubility of oxygen in liquid and solid steel. The main harmful effects are as follows: (1) Oxygen is one of the reasons for the formation of pores in steel castings. During the process, since the solubility of oxygen decreases significantly with the decrease of temperature, the precipitated o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06C21C7/064
CPCC21C7/0006C21C7/06C21C7/0645
Inventor 宋崇智赵晓辉
Owner MAANSHAN RUIHUI ENTERPRISE
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