Electroslag remelting quaternary slag system for preparing high-purity stainless steel

A technology of electroslag remelting and quaternary slag, applied in the field of electroslag, can solve the problems affecting the internal quality of military products and difficult to meet the requirements of technical indicators, so as to reduce the content of non-metallic inclusions, low use cost, easy-to-achieve effects

Inactive Publication Date: 2010-05-12
PANGANG GROUP JIANGYOU CHANGCHENG SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The electroslag system used in the prior art is difficult to meet the requirements of technical indicators such as non-metallic inclusions in steel for super (super) critical units, nuclear power materials and some military s

Method used

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  • Electroslag remelting quaternary slag system for preparing high-purity stainless steel
  • Electroslag remelting quaternary slag system for preparing high-purity stainless steel

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0017] Example 1:

[0018] Using the quaternary slag system of the present invention to prepare a high-purity 12% Cr stainless steel electroslag remelting steel ingot includes the following steps:

[0019] The first step is to prepare the metal electrode:

[0020] The source of the metal electrode is the key to the production of the electroslag furnace. This embodiment adopts "electric arc furnace + external refining" smelting and lower casting method to obtain various specifications of metal electrodes used for electroslag remelting, and the electrode specifications are 1.1 tons to 1.3 tons per piece;

[0021] a. The chemical composition and weight percentage of the consumable electrode should meet the following requirements:

[0022] C 0.08~0.15%, Mn 0.50~0.90%, Si≤0.25%, S≤0.015%, P≤0.020%, Ni 2.00~3.00%, Cr 11.00~12.50%, Mo 1.50~2.00%, V 0.25~0.40% , N0.020~0.040%, the balance is Fe; Residual element requirements: Ti≤0.020%, Al≤0.020%, Cu≤0.10%, Sn≤0.015%, Sb≤0.002%, As≤0.020%;

[...

Example

[0033] Examples 2~6:

[0034] The quaternary slag system of the present invention is used to prepare high-purity 12% Cr stainless steel electroslag remelting steel ingots. Examples of the slag composition and weight percentage of the quaternary slag system are shown in the following table:

[0035]

[0036] Others are the same as those described in Example 1 or the contents of the present invention, omitted.

[0037] Using the method described in Example 1 of the present invention or the contents of the present invention, the ultra (super) critical material 1Cr12Ni3Mo2VN steel [super (super) critical material for steam turbine] is used to detect the data of non-metallic inclusions in the super (super) critical material See Table 1:

[0038] Table 1: Non-metallic inclusions in ultra (super) critical material 1Cr12Ni3Mo2VN steel

[0039]

[0040] Note: 1. The "qualified requirements" value requirements in Table 1 are the values ​​required by the enterprise standard. The inspection method...

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Abstract

The invention discloses an electroslag remelting quaternary slag system for preparing high-purity stainless steel. The electroslag remelting quaternary slag system is characterized by comprising the following compositions in percentage by weight: 50 to 65 percent of CaF2, 20 to 25 percent of Al2O3, 10 to 25 percent of CaO and 0 to 5 percent of MgO. The quaternary slag system is adopted for electroslag remelting, can effectively reduce the non-metallic inclusion content of the steel and improves the purity of the steel under the condition of non-protective atmosphere and has the characteristics of little investment, low use cost and easy realization.

Description

technical field [0001] The invention relates to an electroslag system used in metal electroslag remelting, and relates to an electroslag remelting quaternary slag system used for preparing high-purity stainless steel. It is mainly suitable for electroslag remelting of high-purity 12% Cr series stainless steel, etc., to meet the requirements of technical indicators such as non-metallic inclusions in super (super) critical units, nuclear power materials and some military steels. Background technique [0002] With the rapid development of the electric power industry, the steel used for domestic steam turbine units and the capacity of the unit have increased significantly, and the requirements for the comprehensive performance of the steel used for steam turbine units have become higher and higher. Domestic steam turbine factories have imported a large number of super (ultra)critical steam turbine units from abroad. For steel, its inspection is completely in accordance with fore...

Claims

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Application Information

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IPC IPC(8): C22B9/18
Inventor 丁勇张健罗通伟朱小阳王强孙文玲杨再春邝素军田小辉宋宁秋陈晋阳
Owner PANGANG GROUP JIANGYOU CHANGCHENG SPECIAL STEEL
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