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High-aluminum steel die casting protective slag

A technology of mold flux and high-aluminum steel, which is applied in the field of high-aluminum steel mold casting mold flux, which can solve the difficulties in the production of aluminum-containing steel, the impractical casting of aluminum-containing steel, and the difficulty in solving the surface pits and internal slag inclusions of billets, etc. question

Active Publication Date: 2012-11-07
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent 201010030218.3, the water-cooled mold casting powder provided only solves the problem of water-cooled mold casting of common steel types, and is not practical for casting of aluminum-containing steel
It is very difficult to produce aluminum-containing steel through water-cooled die-casting technology, and the pits on the surface of the slab and the slag inclusions in the interior have always been difficult to solve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] During the trial production process of water-cooled mold casting, defects such as surface cracks, pits, and sticky slag were found in the conventional casting mold flux. According to the characteristics of the steel type and the casting process, the viscosity and melting point of the mold flux were reduced, the carbon solid content was reduced, and the melting speed was increased. . Cast steel type: P80A. The secondary oxidation of molten steel is serious, and the surface and subcutaneous inclusions of the slab are mainly Al 2 o 3 , the ability of mold flux to absorb inclusions mainly refers to the speed of absorbing inclusions and the stability of performance after absorbing inclusions, which depends on its chemical composition.

[0035] Production process route: electric furnace + LF + VD + water-cooled die casting.

[0036] The high-aluminum steel mold casting mold flux suitable for water-cooled mold casting in this embodiment has a chemical composition in weight ...

Embodiment 2

[0040] During the trial production process of water-cooled mold casting, defects such as surface cracks, pits, and sticky slag were found in the conventional casting mold flux. According to the characteristics of the steel type and the casting process, the viscosity and melting point of the mold flux were reduced, the carbon solid content was reduced, and the melting speed was increased. . Cast steel type: P80A. The secondary oxidation of molten steel is serious, and the surface and subcutaneous inclusions of the slab are mainly Al 2 o 3 , the ability of mold flux to absorb inclusions mainly refers to the speed of absorbing inclusions and the stability of performance after absorbing inclusions, which depends on its chemical composition.

[0041] Production process route: electric furnace + LF + VD + water-cooled die casting.

[0042] The high-aluminum steel mold casting mold flux suitable for water-cooled mold casting in this embodiment has a chemical composition in weight ...

Embodiment 3

[0046] During the trial production process of water-cooled mold casting, defects such as surface cracks, pits, and sticky slag were found in the conventional casting mold flux. According to the characteristics of the steel type and the casting process, the viscosity and melting point of the mold flux were reduced, the carbon solid content was reduced, and the melting speed was increased. . Cast steel type: P80A. The secondary oxidation of molten steel is serious, and the surface and subcutaneous inclusions of the slab are mainly Al 2 o 3 , the ability of mold flux to absorb inclusions mainly refers to the speed of absorbing inclusions and the stability of performance after absorbing inclusions, which depends on its chemical composition.

[0047] Production process route: electric furnace + LF + VD + water-cooled die casting.

[0048] The high-aluminum steel mold casting mold flux suitable for water-cooled mold casting in this embodiment has a chemical composition in weight ...

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Abstract

The invention relates to a protective slag, in particular to a high-aluminum steel die casting protective slag comprising the chemical components in percentage by weight: 22-28% of SiO2, 2-7% of Al2O3, 16-22% of CaO, 2-5% of Fe2O3, 2-5% of MgO, 2-6% of MnO, 5-10% of BaO, 4-6% of B2O3, 5-10% of R2O, 7-12% of F and 2-4% of C; the summation of the weight percentage of all the components is 100%, and R2O consists of Na2O and Li2O. With the adoption of the protective slag, the quality problems of longitudinal cracks, pits and slag bonding on the surface of the cast high-aluminum steel are solved, the slag degeneration caused by the fact that a reducing element enters the slag after being oxidized is inhibited, the stability of the property of the protective slag is ensured, and meanwhile, the Al2O3 absorbing rate of the slag is increased.

Description

technical field [0001] The invention relates to a mold flux, in particular to a high-aluminum steel mold casting mold flux. Background technique [0002] The role of traditional mold casting mold flux: isolation from the atmosphere, meniscus heat insulation and absorption of non-metallic inclusions, no lubrication, no need to control heat transfer to the mold wall. The slag isolates the air to prevent the oxidation of molten steel; the unmelted solid slag has a thermal insulation effect on the molten steel; the slag also absorbs inclusions such as alumina in the molten steel. During die casting, the bagged powder slag is hung or put into the mold before pouring, the energy of the molten steel will burn the bag, and the powder slag will be scattered on the surface of the molten steel. Due to the requirements of mold casting conditions, the mold flux has low alkalinity, high viscosity, and a melting point of 1100-1250°C. The main chemical composition of its base material: Si...

Claims

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Application Information

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IPC IPC(8): B22D27/04B22D27/18B22D7/00
Inventor 李明吴年春尹雨群党军殷浩张逖张文明
Owner NANJING IRON & STEEL CO LTD
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