Continuous casting crystallizer casting powder for titanium-containing steel as well as preparation method and application of continuous casting crystallizer casting powder

A continuous casting mold and mold flux technology, which is applied in the field of continuous casting mold flux for titanium-containing steel and its preparation, can solve the problems of easy formation of cracks on the billet surface and poor lubrication performance, and reduce the occurrence of cracks on the billet surface High efficiency, good lubricating performance, and the effect of reducing the thermal stress of the slab

Active Publication Date: 2022-05-13
INST OF RES OF IRON & STEEL JIANGSU PROVINCE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor lubricating properties of mold slag used in continuous casting of titanium-containing steel in the prior art and easy formation of cracks on the billet surface, thereby providing a continuous casting mold for titanium-containing steel Mold flux and its preparation method and application

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  • Continuous casting crystallizer casting powder for titanium-containing steel as well as preparation method and application of continuous casting crystallizer casting powder

Examples

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Embodiment 1

[0040] This example provides a mold flux for continuous casting molds for titanium-containing steel, the composition of which is calculated by mass percentage: SiO 2 30%, CaO 30%, MgO 2.5%, Al 2 o 3 8%, Na 2 O+K 2 O 9% (of which, Na 2 O 4%, K 2 O 5%), F 3%, C8%, B 2 o 3 3%, MnO 1%, and the rest are unavoidable impurities.

[0041] The binary basicity of the mold flux CaO / SiO 2 is 1.0, the melting point is 1000°C, and the viscosity at 1300°C is 0.86 Pa·s.

[0042] The preparation method of described mold powder comprises the following steps:

[0043] S1: Weigh silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide, sodium carbonate, potassium carbonate, diboron trioxide, manganese carbonate, and calcium fluoride according to the content of mold flux components in this embodiment, and then put them into the mixing Fully mix in the material machine to obtain the mixture, and then put the mixture into the melting furnace for pre-melting, the pre-melting temper...

Embodiment 2

[0048] This example provides a mold flux for continuous casting molds for titanium-containing steel, the composition of which is calculated by mass percentage: SiO 2 31%, CaO 32%, MgO 3.5%, Al 2 o 3 6%, Na 2 O+K 2 O 11% (of which, Na 2 O 5%, K 2 O 6%), F 3.5%, C 4%, B 2 o 3 2%, MnO 2%, and the rest are unavoidable impurities.

[0049] The binary basicity of the mold flux CaO / SiO 2It is 1.03, the melting point is 1050°C, and the viscosity at 1300°C is 0.60 Pa·s.

[0050] The preparation method of described mold powder comprises the following steps:

[0051] S1: According to the content of mold powder components in this embodiment, weigh silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide, sodium carbonate, potassium carbonate, diboron trioxide, manganese carbonate, and calcium fluoride, and put them into the mixture Fully mix in the machine to obtain the mixture, then put the mixture into the melting furnace for pre-melting, the pre-melting temperature i...

Embodiment 3

[0056] This example provides a mold flux for continuous casting molds for titanium-containing steel, the composition of which is calculated by mass percentage: SiO 2 32%, CaO 35%, MgO 3.5%, Al 2 o 3 5%, Na 2 O+K 2 O 12% (of which, Na 2 O 6%, K 2 O 6%), F 4%, C 4%, B 2 o 3 1%, MnO 3%, and the rest are unavoidable impurities.

[0057] The binary basicity of the mold flux CaO / SiO 2 It is 1.09, the melting point is 1100°C, and the viscosity at 1300°C is 0.46Pa·s.

[0058] The preparation method of described mold powder comprises the following steps:

[0059] S1: Weigh silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide, sodium carbonate, potassium carbonate, diboron trioxide, manganese carbonate, and calcium fluoride according to the above formula ratio, put them into the mixer and mix them thoroughly. Obtain the mixture, and then put the mixture into the melting furnace for pre-melting, the pre-melting temperature is 1500°C, and the holding time is 2.0h, t...

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Abstract

The invention provides continuous casting crystallizer casting powder for titanium-containing steel as well as a preparation method and application of the continuous casting crystallizer casting powder, belongs to the field of continuous casting crystallizer casting powder for titanium-containing steel, and overcomes the defects that in the prior art, the crystallizer casting powder for titanium-containing steel continuous casting is poor in lubricating performance, and cracks are easily formed on the surface of a blank. The crystallizer casting powder comprises, by mass, 28%-33% of SiO2, 30%-35% of CaO, 2.5%-3.5% of MgO, 5%-8% of Al2O3, 9%-12% of Na2O + K2O, 3%-4% of F, 4%-8% of C, 1%-3% of B2O3, 1%-3% of MnO and the balance inevitable impurities. The binary alkalinity R is 1.0-1.1, R is CaO / SiO2, the melting point is 1000-1100 DEG C, and the viscosity at the temperature of 1300 DEG C is 0.46-0.86 Pa.s.

Description

technical field [0001] The invention belongs to the field of continuous casting mold flux for titanium-containing steel, and in particular relates to a continuous casting mold flux for titanium-containing steel and its preparation method and application. Background technique [0002] Titanium is an important microalloying element in steel materials, which has the advantages of good strengthening effect and low cost; titanium can also combine with free nitrogen in steel to reduce the age hardening of steel, eliminate or reduce the yield platform, and improve uniform deformation ability; In welding consumables, titanium can reduce spatter and improve weld formability; in stainless steel, titanium can be combined with carbon and nitrogen to prevent chromium depletion at grain boundaries and improve grain boundary corrosion resistance. [0003] However, titanium is an active metal element. During the continuous casting process, titanium in steel is easily oxidized by mold slag, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111C22C38/02C22C38/04C22C38/12C22C38/14
CPCB22D11/111B22D11/001C22C38/02C22C38/04C22C38/12C22C38/14C22C38/002Y02P10/20
Inventor 麻晗李强
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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