High-temperature-resistant austenitic stainless steel for furnace pipe

An austenitic stainless steel, high temperature resistant technology, applied in furnaces, electric furnaces, furnace types, etc., can solve the problems of not meeting the high temperature creep resistance and oxidation resistance requirements of high temperature furnace, and shortening the smelting time. The effect of cycle and power consumption reduction

Inactive Publication Date: 2016-07-27
ZHENSHI GROUP EASTERN SPECIAL STEEL
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The maximum working temperature of 310S can reach 1200°C, and it can work continuously at 1100°C. It is usually used in a high temperature environment below 1100°C, but the service time in a high temperature environment is short. Body stainless steel has higher high temperature durability and high temperature oxidation resistance
This stainless steel has the advantages of high temperature resistance and low temperature strength, but it cannot meet the high temperature creep resistance and oxidation resistance requirements of the high temperature furnace.

Method used

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  • High-temperature-resistant austenitic stainless steel for furnace pipe

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Embodiment

[0044] 1. Consteel electric furnace smelting stainless steel mother liquor, the mother liquor tapping composition is composed of: C: 1.9%, Si: 0.3%, P: 0.005%, Cr: 1.25%, W: 4.1, Ni: 30%, and the balance is Fe; the tapping temperature is 1595°C.

[0045] 2. The Consteel mother liquor with qualified composition and the high-carbon ferrochrome steel liquid in the intermediate frequency furnace are successively tapped into the duckbill ladle and mixed, and then mixed into the AOD furnace for oxygen blowing decarburization and nitrogen blowing. Deoxidation and composition adjustment, the tapping temperature is 1570°C; after the composition is qualified, it is blended into the LF furnace for refining and microalloying, and the composition of the stainless steel melt is finally adjusted according to mass percentage: C: 0.025%, Cr: 24.5%, Si: 0.45%, Ni: 20.1%, Mn: 1.5%, W: 2.01, N: 0.08%, P: 0.018%, S: 0.0005%, and the balance is Fe; the molten stainless steel is continuously cast in...

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Abstract

The invention relates to high-temperature-resistant austenitic stainless steel for a furnace pipe. The high-temperature-resistant austenitic stainless steel comprises the following components in percentage by mass: 24-26% of Cr, 19-21% of Ni, 0.3-0.8% of Si, 0.02-0.06% of C, 1.0-1.5% of Mn, 1.5-2.5% of W, less than or equal to 0.2% of N, less than or equal to 0.04% of P, less than or equal to 0.03% of S and the balance of Fe. According to the high-temperature-resistant austenitic stainless steel, high-temperature creep resistance and oxidation resistance which are better than those of 310 heat-resistant stainless steel are provided; and the high-temperature-resistant austenitic stainless steel can be used for a longer time at a temperature above 1000 DEG C.

Description

technical field [0001] The invention relates to an austenitic stainless steel for a high temperature resistant furnace. Background technique [0002] The Consteel electric furnace steelmaking process is a new electric furnace steelmaking technology implemented in the 1990s. The electric furnace has the characteristics of continuous feeding, continuous preheating, continuous melting and continuous smelting. It has short smelting cycle, low smelting energy consumption, With the advantages of low noise and low investment cost, it is an advanced electric furnace smelting technology with strong vitality and competitiveness in the field of steelmaking. And there is no precedent for tungsten-containing stainless steel mother liquor. By adjusting the process parameters, the present invention can not only use Consteel electric furnace to smelt austenitic stainless steel mother liquor for high-temperature-resistant furnace, but also reduce power consumption and shorten the smelting cy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C33/04C21C5/52
CPCC21C5/52C22C33/04C22C33/06C22C38/001C22C38/02C22C38/04C22C38/18C22C38/40C22C38/44Y02P10/20
Inventor 颜海涛杨振申鹏李杰杨赛刘晓亚
Owner ZHENSHI GROUP EASTERN SPECIAL STEEL
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