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Continuous casting crystallizer casting powder for super-wear-resistant steel, preparation method and application

A continuous casting crystallizer and mold slag technology, applied in the field of steelmaking auxiliary materials, can solve problems such as cracked slag grooves, affecting continuous casting casting, poor lubrication conditions, etc., and achieve the effect of stabilizing heat flow

Inactive Publication Date: 2020-03-27
XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the casting process, there are very troublesome problems. One is that heavy metal oxides enter the mold slag, which seriously denatures the mold slag, which affects the continuous casting process. The other is that the surface of the slab is poorly lubricated. , there are cracks and slag ditch scarring defects
The industry's research on the denaturation of mold slag slag mainly focuses on the influence of aluminum oxide and manganese oxide on the performance of slag in conventional carbon steel, and the influence of chromium oxide, molybdenum oxide, nickel oxide, manganese oxide and Comprehensive research on titania is very limited

Method used

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  • Continuous casting crystallizer casting powder for super-wear-resistant steel, preparation method and application

Examples

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Effect test

Embodiment 1

[0047] A continuous casting mold powder for super wear-resistant steel, which includes the following components, fluorite, white alkali, imported carbon black, domestic carbon black, earthy graphite, sodium fluorosilicate, wollastonite, clay, carbonic acid Lithium, borax, cryolite, binder, water-reducing agent, dispersant, their weight percentages are respectively 18.0%, 12.0%, 0.5%, 1.0%, 6.0%, 2.0%, 49.0%, 2.0%, 0.5℅ , 6.0%, 2.0%, 1.0%.

[0048] The chemical composition percentage of the mold flux is CaO 32.34%, SiO 2 28.09%, MgO 0.73%, Fe 2 o 3 0.40%, Al 2 o 3 0.95%, Na 2 O 9.75%, F - 10.14%, Li 2 O 0.2%, B 2 o 3 2.19%, C 6.%.

[0049] The physical index of the mold flux is binary basicity (CaO / SiO 2 ) is 1.15, the melting temperature is 1040°C, and the viscosity at 1300°C is 0.06Pa·s.

[0050] The preparation method of the mold flux in the above example 1 includes the following steps: metering according to the weight of the material, adding water to the mixi...

Embodiment 2

[0053] A continuous casting mold powder for super wear-resistant steel, which includes the following components, fluorite, white alkali, imported carbon black, domestic carbon black, earthy graphite, sodium fluorosilicate, wollastonite, clay, carbonic acid Lithium, borax, cryolite, binder, its weight percent content is respectively 20.0%, 10.0%, 0.5%, 1.0%, 5.0%, 2.0%, 44.5%, 6.0%, 1.0%, 7.0%, 2.0%, 1.0%.

[0054] The chemical composition percentage in the mold flux is CaO 32.01%, SiO 2 28.65%, MgO 0.74%, Fe 2 o 3 0.51%, Al 2 o 3 1.45%, Na 2 O 8.0%, F - 11.2%, Li 2 O 0.41%, B 2 o 3 2.55%, C5.4.%.

[0055] The physical index of the mold flux is binary basicity (CaO / SiO 2 ) is 1.11, the melting temperature is 1065°C, and the viscosity at 1300°C is 0.04Pa·s.

Embodiment 3

[0057] A continuous casting mold powder for super wear-resistant steel, which includes the following components, fluorite, white alkali, imported carbon black, domestic carbon black, earthy graphite, sodium fluorosilicate, wollastonite, clay, carbonic acid Lithium, borax, cryolite, binder, its weight percentage content is respectively 19.0%, 9.0%, 1.0%, 1.0%, 4.0%, 2.0%, 41.95%, 11.0%, 1.55℅, 7.5%, 1.0%, 1.0%.

[0058] The chemical composition percentage in the mold flux is CaO 31.23%, SiO 2 29.4%, MgO 0.76%, Fe 2 o 3 0.62%, Al 2 o 3 1.92%, Na 2 O 7.56%, F - 10.1%, Li 2 O 0.6%, B 2 o 3 2.73%, C5.1.%.

[0059] The physical index of the mold flux is binary basicity (CaO / SiO 2 ) is 1.06, the melting temperature is 1085°C, and the viscosity at 1300°C is 0.085Pa·s.

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Abstract

The invention discloses continuous casting crystallizer casting powder for super-wear-resistant steel, a preparation method and an application. The continuous casting crystallizer casting powder comprises the following chemical components of, by weight, 30-35 parts of CaO, 25-30 parts of SiO2, 0.5-2.5 parts of MgO, 0.0-2.0 parts of Al2O3, 0.0-2.0 parts of Fe2O3, 7.0-10.0 parts of Na2O, 9.0-13.5 parts of F, 2.2-2.92 parts of B2O3, 0.2-0.8 part of Li2O, and 4.5-6.5 parts of C. Slag of the casting powder has the advantages that after heavy metal oxide in molten steel is absorbed, the slag is lowin denaturation and stable and uniform in slag consumption, so that the super-wear-resistant steel fully plays the lubricating and heat transfer effect in the billet drawing process, the accident riskduring production of the super-wear-resistant steel by using a continuous casting sheet billet is remarkably reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of steelmaking auxiliary materials, in particular to a mold powder for continuous casting molds of super wear-resistant steel, a preparation method and application thereof. Background technique [0002] Super wear-resistant steel is based on conventional wear-resistant steel, adding a certain amount of Cr, Mo, Ni, Ti, Mn to make the steel have ultra-high strength and yield and dense and fine microcrystalline structure. 10 to 20 times that of grinding steel plates; can significantly improve the wear resistance of machinery-related parts; thus improving the service life of machinery and reducing production costs. The surface hardness of this product usually reaches 450-700HB. Applicable structural steel plates for processing and manufacturing wear-resistant and vulnerable parts for mines and various construction machinery. [0003] Super wear-resistant steel can meet various performance requirements put forw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 屈党军李晓阳徐金岩李冬冬王希彬任义
Owner XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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