High-temperature heat-resistant and corrosion-resistant stainless steel and manufacturing method thereof

A high-temperature heat-resistant and manufacturing method technology, applied in the field of high-temperature heat-resistant and corrosion-resistant stainless steel and its manufacturing, can solve the problem of increasing the risk of alloy embrittlement and failing to meet high-temperature strength, maximum service temperature and phase stability oxidation/sulfurization resistance at the same time /Hydrogenation/carbonization performance and other issues

Inactive Publication Date: 2012-08-15
JIANGSU JINYUE AVIATION ALLOY MATERIAL
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Problems solved by technology

[0006] In order to meet the new strength, temperature and corrosion resistance requirements in complex atmospheres, the original stainless steel and some age hardening alloys that have been used in other fields so far cannot meet high temperature strength, maximum service temperature and phase stability, oxidation resistance/ Vulcanization/Hydrogenation/Carbonation Performance Requirements
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  • High-temperature heat-resistant and corrosion-resistant stainless steel and manufacturing method thereof
  • High-temperature heat-resistant and corrosion-resistant stainless steel and manufacturing method thereof
  • High-temperature heat-resistant and corrosion-resistant stainless steel and manufacturing method thereof

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Embodiment Construction

[0029] The present invention will be further described in detail below in combination with specific embodiments.

[0030] (1) Smelting: The alloy of the present invention can be prepared by conventional smelting methods. The preferred smelting procedure is to first carry out vacuum induction smelting, melting scrap steel and ferrochrome in an electric furnace, and adding ferrosilicon and ferromanganese after molten steel is melted to control carbon When the content reaches the requirement, after the composition is adjusted before the furnace, the temperature of the melt is raised to 1560-1620°C, silicon-calcium alloy is added for pre-deoxidation, aluminum is added for final deoxidation, and then iron-boron is added in order to melt; after all iron-boron is melted, Wrap the composite modification inoculant composed of granular lanthanum (La) or rare earth element (Re) smaller than 12mm in a thin iron sheet, bake it at a temperature of 160-200°C, and place it at the bottom of the...

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Abstract

The invention discloses a high-temperature heat-resistant and corrosion-resistant stainless steel and a manufacturing method of the stainless steel. The stainless steel comprises the following chemical compositions by weight: less than 0.08% of C, less than 1.50% of Si, less than 2.00% of Mn, less than 0.045% of P, less than 0.03% of S, 24.0%-26.0% of Cr, 19.0%-22.0% of Ni, 0.5%-1.0% of Nb, less than 0.003% of B, less than 0.01% of La or Re, and the balance of Fe and inevitable impurity elements. The preferential smelting procedures are as follows: conducting vacuum induction melting firstly, then conducting vacuum arc remelting or electroslag remelting, conducting hot processing formation and then conducting solid-solution treatment and ageing treatment.

Description

technical field [0001] The invention relates to a high-temperature, heat-resistant and corrosion-resistant stainless steel, which has good high-temperature strength, plasticity, high-temperature structure stability, toughness, and a combination of oxidation / sulfurization / hydrogenation / carbonization resistance, and can be applied to large-scale electric power, petrochemical, and environmental protection equipment The materials used in and the flat parts in high temperature oxidation / sulfurization / hydrogenation / carbonization environment are nickel-based alloys that can be cast and welded, and belong to the field of material engineering technology. Background technique [0002] Compared with ordinary stainless steel (18-8 series, martensitic stainless steel, ferritic stainless steel, etc.), high-temperature heat-resistant and corrosion-resistant stainless steel has absolute advantages in many complex corrosive environments and high temperature conditions, and is widely used in e...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/54C22C38/48
Inventor 毛征东蒋红军耿德英丁家伟孙健
Owner JIANGSU JINYUE AVIATION ALLOY MATERIAL
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