Crystallizer casting powder for high-aluminum steel continuous casting

A technology of mold powder and high-aluminum steel, which is applied in the field of mold powder for continuous casting of high-aluminum steel and slab continuous casting of high-alumina steel ([Al]=1%~3.5%) steel grades, It can solve the problems of increasing continuous casting production cost and high O content, and achieve the effects of low cost, reduced reactivity and strong capacity

Inactive Publication Date: 2014-07-09
西峡县恒基冶材有限公司
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Problems solved by technology

The mold flux of this invention can effectively prevent the unevenness and cracks of the slab, but the LiAlO 2 The exact mechanism by which the precipit

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  • Crystallizer casting powder for high-aluminum steel continuous casting

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Embodiment Construction

[0016] The present invention will be described in more detail below with examples. These examples are only descriptions of the best embodiments of the present invention, and do not limit the scope of the present invention in any way.

[0017]The mold mold powder for continuous casting of high-alumina steel in the present invention is prepared from wollastonite, limestone, quartz sand, fluorite, bauxite, magnesia, anhydrous borax, lithium carbonate and carbonaceous materials as raw materials. Its chemical composition satisfies by weight percentage: SiO 2 :10~25%, Al 2 o 3 : 12~25%, CaO: 15~35%, MgO: 1~3%, F: 6~10%, Na 2 O+B 2 o 3 ≤3%, Li 2 O:1~4%, Fe 2 o 3 ≤2%, C: 5~10%, and the rest are impurities.

[0018] The physical and chemical properties of the high aluminum steel continuous casting mold flux of the present invention are: CaO / SiO 2 It is 1.5-2.2, the melting point is 1000-1100°C, and the viscosity is 0.09-0.15Pa·s at 1300°C.

[0019] Table 1 lists the weight p...

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Abstract

The invention provides crystallizer casting powder for high-aluminum steel continuous casting. The crystallizer casting powder is chemically composed of, by weight, 10-25% of SiO2, 12-25% of Al2O3, 15-35% of CaO, 1-3% of MgO, 6-10% of F, </=3% of Na2O+B2O3, 1-4% of LiO2, </=2% of Fe2O3, 5-10% of C and the rest impurities. As for physical and chemical properties of the crystallizer casting powder, CaO/SiO2 is 1.5-2.2, melting point is 1000-1100 DEG C, viscosity at 1300 DEG C is 0.09-0.15Pa.s. The crystallizer casting powder has the advantages of low cost and capability of effectively lowering slag-steel interface reactivity, high capability of absorbing impurities mixed in Al2O3 and capability of effectively coordinating and controlling lubricating and heat-transferring characteristics, smoothness of the process of high-aluminum steel continuous casting can be guaranteed, high-aluminum steel plate blanks which are excellent in surface quality can be cast, and sequence continuous casting can be realized.

Description

technical field [0001] The invention belongs to the technical field of continuous casting production, and relates to a mold powder for continuous casting of high aluminum steel, which is suitable for high aluminum steel ([Al]=1%~3.5%) steel grades with peritectic reaction during solidification slab continuous casting production. Background technique [0002] In order to achieve energy saving and emission reduction, materials in the automotive industry are developing in the direction of lightweight and high strength. High-aluminum steels such as transformation-induced plasticity (TRIP) steels and twinning-induced plasticity (TWIP) steels have good application prospects in the automotive field due to their perfect combination of plasticity and strength. However, in the casting process of high-alumina steel, due to the high content of [Al] in molten steel, it is easy to react with the components in traditional mold flux, resulting in a series of problems such as deterioration ...

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Application Information

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IPC IPC(8): B22D11/111
Inventor 王谦何生平杨杰徐鹏包秀芝
Owner 西峡县恒基冶材有限公司
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