Protective slag for Austenic stainless steel plate wand crystallizer

A technology of mold powder and austenitic stainless steel, which is applied in the field of austenitic stainless steel slab mold powder, can solve the problems of high grinding loss rate, poor stability, and prone to depressions and cracks on the surface of the slab. Achieve the effects of reduced grinding loss, good stability and improved surface quality

Inactive Publication Date: 2005-08-24
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Mold slag adsorption of AL in molten steel 2 o 3 、Cr 2 o 3 、TiO 2 After waiting for inclusions, the performance changes greatly, the stability is

Method used

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  • Protective slag for Austenic stainless steel plate wand crystallizer

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Example Embodiment

[0033] The austenitic stainless steel 0Cr18Ni9 slab produced by the applicant’s second steelmaking plant, the composition requirements of the finished steel

[0034] C≤0.07% Si≤1.00% Mn≤2.0% P≤0.035%

[0035] S≤0.030% Cr≤17.0%-19.0% Ni≤8%-11%

[0036] The size of the billet is 200×1240mm 2 , During the continuous casting and drawing process, the temperature of the molten steel in the tundish is 1480°C-1505°C, and the drawing speed is 0.75-0.95m / min. Using the austenitic stainless steel slab mold mold powder of the present invention, the slag basicity is CaO / SiO 2 =1.36, melting point 1098°C, melting rate 30 seconds, viscosity 0.156pa.s, thermal conductivity of mold slag at 800°C is 0.124W / mk, mold slag liquid slag layer thickness in the mold is 11-14mm, mold slag consumption is 0.48 kg / steel, the grinding loss rate of the cast slab before rolling is 1.24%.

[0037] The steps of processing base materials are as follows:

[0038] The pre-melted raw materials 1 and ingredients are me...

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Abstract

A protecting slag for stainless austenite steel slab crystallizer contains proportionally calcium oxide, SiO2, Al2O3, magnesium oxide, Fe2O3, manganese oxide, F ions, sodium oxide, lithium oxide and immobilized carbon. Its advantages are high surface quality of billet and low cost.

Description

Technical field [0001] The invention relates to an austenitic stainless steel slab crystallizer powder. Background technique [0002] With the continuous development of stainless steel production and stainless steel continuous casting technology, the requirements for mold powder for stainless steel continuous casting mold are getting higher and higher. The performance of mold powder for stainless steel continuous casting mold directly affects stainless steel continuous casting slabs and hot-rolled and cold-rolled products The quality of the board, especially the surface quality. [0003] Austenitic stainless steel refers to stainless steel whose structural structure is austenitic at high and low temperatures. The output of austenitic stainless steel sheet currently accounts for more than 50% of the total stainless steel. Compared with carbon steel and other stainless steels, austenitic stainless steel has a higher thermal expansion coefficient, stronger shrinkage ability a...

Claims

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Application Information

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IPC IPC(8): B22D11/111
Inventor 段建平杨礼元程立马建明
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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