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High temperature-resistant high strength stainless steel plate for hearth plate and production method

A technology of stainless steel plate and production method, which is applied in the field of special steel, can solve the problems of not being able to fundamentally guarantee the high-level mechanical properties of the heat-resistant stainless steel furnace bottom plate, increasing the direct cost and time cost of production, and the difficulty of large-scale promotion. , to achieve the effect of reducing the tendency of crack formation, improving creep resistance and durability, and reducing the content of harmful inclusions

Inactive Publication Date: 2018-12-18
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the several patents mentioned above, it is mentioned that the composition system of the furnace floor based on the addition of alloy elements or rare elements does not change much in the process, but the plan of using composite materials and changing the internal and external structure of the furnace floor will greatly increase production. Direct cost and time cost, and large-scale promotion is difficult, so it cannot fundamentally guarantee the high-level mechanical properties and long service life of the heat-resistant stainless steel furnace bottom plate

Method used

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  • High temperature-resistant high strength stainless steel plate for hearth plate and production method
  • High temperature-resistant high strength stainless steel plate for hearth plate and production method
  • High temperature-resistant high strength stainless steel plate for hearth plate and production method

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Effect test

Embodiment 1

[0032] A high-temperature resistant high-strength stainless steel plate for the bottom plate of a furnace. The production process includes: smelting by a composite blowing method of electric furnace + oxygen lance blowing oxygen, adding lime, fluorite and dephosphorization agent, and performing deep dephosphorization. The tapping temperature is at 1655°C. Then use the LF furnace for refining, add various alloys in the LF furnace, adjust the alloy, add lime and fluorite, and carry out deep desulfurization; add Al powder for deoxidation; the whole process of the LF furnace uses bottom blowing nitrogen to increase nitrogen. At the VD station, a high vacuum of 670Pa is used for 20 minutes. After the vacuum is broken, FeTi and carbonized rice husk are added, and softly blown for 10 minutes (Ar:N is controlled at 2:1), followed by molding. After the steel ingot is demolded and cooled slowly, it is annealed, the cap and the bottom of the ingot are sawed off, the surface of the steel ...

Embodiment 2

[0034] A high-temperature resistant high-strength stainless steel plate for the bottom plate of a furnace. The production process includes: smelting by a composite blowing method of electric furnace + oxygen lance blowing oxygen, adding lime, fluorite and dephosphorization agent, and performing deep dephosphorization. The tapping temperature is at 1671°C. Then use the LF furnace for refining, add various alloys in the LF furnace, adjust the alloy, add lime and fluorite, and carry out deep desulfurization; add Al powder for deoxidation; the whole process of the LF furnace uses bottom blowing nitrogen to increase nitrogen. At the VD station, a high vacuum of 1330Pa is used for 20 minutes. After the vacuum is broken, FeTi and carbonized rice husk are added, and softly blown for 10 minutes (Ar:N is controlled at 2:1), followed by molding. After the steel ingot is demolded and cooled slowly, it is annealed, the cap and the bottom of the ingot are sawed off, the surface of the steel...

Embodiment 3

[0036] A high-temperature resistant high-strength stainless steel plate for the bottom plate of a furnace. The production process includes: smelting by a composite blowing method of electric furnace + oxygen lance blowing oxygen, adding lime, fluorite and dephosphorization agent, and performing deep dephosphorization. The tapping temperature is at 1681°C. Then use the LF furnace for refining, add various alloys in the LF furnace, adjust the alloy, add lime and fluorite, and carry out deep desulfurization; add Al powder for deoxidation; the whole process of the LF furnace uses bottom blowing nitrogen to increase nitrogen. At the VD station, a high vacuum of 3350Pa is used for 20 minutes. After the vacuum is broken, FeTi and carbonized rice husk are added, and softly blown for 10 minutes (Ar:N is controlled at 1:1), followed by molding. After the steel ingot is demolded and cooled slowly, it is annealed, the cap and the bottom of the ingot are sawed off, the surface of the steel...

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Abstract

The invention relates to a high temperature-resistant high strength stainless steel plate for a hearth plate and a production method thereof. The strength stainless steel plate for a hearth plate hasthe yield strength being greater than or equal to 30 MPa under the high temperature of 1200 DEG C, and comprises the following components in weight percent: 0.05-0.08% of C; 0.40-0.80% of Si; 1.00-1.60% of Mn; less than or equal to 0.010% of P; less than or equal to 0.010% of S; 0.02-0.09% of N; 10.0-12.0% of Ni; 22.00-24% of Cr; 0.10-0.50% of Mo; 0.02-0.05% of Nb; 0.040-0.090% of V; 0.01-0.04% ofTi; and the balance Fe and inevitable impurities. According to the invention, improvements are made from the component and the production method, the high-temperature strength of the hearth plate isimproved, and the service life of the hearth plate is prolonged.

Description

technical field [0001] The invention belongs to the technical field of special steel, and in particular relates to a stainless steel plate for a high-temperature-resistant high-strength furnace floor and a production method. Background technique [0002] With the rapid development of my country's silicon steel project, the domestic production of cold-rolled oriented silicon steel has reached 1.2 million tons. Annular annealing furnace (ROF furnace) is a new annealing furnace developed on the basis of oriented silicon steel tunnel annealing furnace technology. The application of ROF furnace can greatly reduce energy consumption, improve productivity, and the length of the plant can be greatly shortened. The annual capacity of each ROF furnace is about 80,000 tons. The furnace bottom plate is used to carry heat-treated steel coils in the ROF furnace for high-temperature annealing. It is a high-consumption part. The working diagram of the furnace bottom plate is shown in figu...

Claims

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Application Information

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IPC IPC(8): C21D8/02C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/50C22C38/58C21C7/072
CPCC21C7/072C21D8/0221C22C38/001C22C38/002C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/50C22C38/58
Inventor 周千学杨治争官计生朱丛茂罗毅李德发严翔熊玉章付勇涛
Owner 武汉钢铁有限公司
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