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Continuous casting slab for seawater corrosion-resistant structural steel and production method thereof

A production method and continuous casting billet technology are applied to the continuous casting billet for seawater corrosion-resistant structural steel and its production field, which can solve the problems of long casting time, complex organization, difficulty in floating, etc., so as to reduce smelting cost, improve yield, Process stability effect

Active Publication Date: 2021-10-29
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of continuous casting has many links and the casting time is long, so the sources of inclusions are wide and the structure is relatively complex; it is difficult for inclusions to float up from the liquid phase cavity of the crystallizer, and the existence of inclusions destroys the continuity and stability of the steel matrix. Density

Method used

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  • Continuous casting slab for seawater corrosion-resistant structural steel and production method thereof

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Effect test

Embodiment 1

[0017] The cross-section of the continuous casting slab for seawater corrosion-resistant structural steel in this example is 330mm×2400mm, and the chemical composition and mass percentage of the continuous casting slab are shown in Table 1.

[0018] The production method of continuous casting slabs for seawater corrosion-resistant structural steel in this embodiment includes molten iron pretreatment, converter steelmaking, alkaline electric arc furnace smelting, RH vacuum treatment, and protective casting processes. The specific process steps are as follows:

[0019] (1) Hot metal pretreatment process: the blast furnace slag in the molten iron ladle is removed by the slag removal machine, and the passivated magnesium alloy is sprayed into the passivated magnesium alloy for desulfurization and dephosphorization through a spray gun to remove RE precious metals. After pretreatment, the contents of the molten iron are P: 0.003%, S: 0.003%;

[0020] (2) Converter steelmaking proces...

Embodiment 2

[0026] The cross-section of the continuous casting slab for seawater corrosion-resistant structural steel in this embodiment is 300mm×2000mm, and the chemical composition and mass percentage of the continuous casting slab are shown in Table 1.

[0027] The production method of continuous casting slabs for seawater corrosion-resistant structural steel in this embodiment includes molten iron pretreatment, converter steelmaking, alkaline electric arc furnace smelting, RH vacuum treatment, and protective casting processes. The specific process steps are as follows:

[0028] (1) Hot metal pretreatment process: the blast furnace slag in the molten iron ladle is removed by the slag removal machine, and the passivated magnesium alloy is sprayed through the spray gun for desulfurization and dephosphorization to remove RE precious metals. After pretreatment, the contents of the molten iron are P: 0.002%, S: 0.001%;

[0029] (2) Converter steelmaking process: adding 85% of molten iron an...

Embodiment 3

[0035] The cross-section of the continuous casting slab for seawater corrosion-resistant structural steel in this example is 250mm×2000mm, and the chemical composition and mass percentage of the continuous casting slab are shown in Table 1.

[0036] The production method of continuous casting slabs for seawater corrosion-resistant structural steel in this embodiment includes molten iron pretreatment, converter steelmaking, alkaline electric arc furnace smelting, RH vacuum treatment, and protective casting processes. The specific process steps are as follows:

[0037] (1) Hot metal pretreatment process: the blast furnace slag in the molten iron ladle is removed by the slag removal machine, and the passivated magnesium alloy is sprayed into the passivated magnesium alloy for desulfurization and dephosphorization through a spray gun to remove RE precious metals. After pretreatment, the contents of the molten iron are P: 0.003%, S: 0.002%;

[0038] (2) Converter steelmaking proces...

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Abstract

The invention discloses a continuous casting slab for seawater corrosion-resistant structural steel and a production method thereof. The chemical composition and mass percentage of the continuous casting slab are: C≤0.10%, Si: 0.15-0.40%, Mn: 1.00~1.60%, P≤0.005%, S≤0.003%, Ni≤0.40%, Cr≤0.60%, Alt: 0.020~0.040%, Nb: 0.020~0.030%, Cu≤0.10%, N≤0.0014%, the rest It is Fe and unavoidable impurities; the production method includes molten iron pretreatment, converter steelmaking, basic electric arc furnace smelting, RH vacuum treatment, and protective casting processes. The continuous casting slab for seawater corrosion-resistant structural steel obtained in the present invention is a new type of seawater corrosion-resistant structural steel base material, which meets the production requirements of high-quality seawater corrosion-resistant steel plates, has a stable process and low cost, and can realize batch localized production.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a continuous casting slab for seawater corrosion-resistant structural steel and a production method thereof. Background technique [0002] The intensification of world energy consumption and the depletion of energy are gradually highlighted in the world competition. The development of traditional energy alternatives, especially clean energy development, has become the blue sky for the development of new energy in the world. Nuclear energy, solar energy, and wind power generation are the main breakthroughs for new energy. [0003] In order to increase the safety and environmental protection factor, the development of offshore mobile nuclear power and wind power generation is a new research and development project. In order to meet the demand for offshore structural steel, it is necessary to develop high-quality continuous casting billets. However, the production pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/08C22C38/16C22C38/38C22C38/26C22C38/20C22C38/58C22C38/48C22C38/42C21C7/10B22D11/00
CPCB22D11/00C21C7/10C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/16C22C38/20C22C38/26C22C38/38C22C38/42C22C38/48C22C38/58Y02P10/20
Inventor 邓建军刘印子李杰赵国昌龙杰林明新张萌刘生谢东程含文李媛媛张志勇
Owner WUYANG IRON & STEEL
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