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Austenitic heat-resistant stainless steel and processing method thereof

A technology of heat-resistant stainless steel and processing method, which is applied in the field of austenitic stainless steel and can solve the problems of high nickel content and high cost

Inactive Publication Date: 2011-11-02
XUANDA IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But because of its high nickel content, the cost is higher

Method used

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  • Austenitic heat-resistant stainless steel and processing method thereof
  • Austenitic heat-resistant stainless steel and processing method thereof
  • Austenitic heat-resistant stainless steel and processing method thereof

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Embodiment Construction

[0020] The invention is an austenitic heat-resistant stainless steel, including carbon, silicon, manganese, chromium, nickel, nitrogen and rare earth elements, and the components are: carbon: 0.25-0.45%, silicon: 0.5-2% by mass percentage , manganese: 0.5-2%, chromium: 23-27%, nickel: 6-10%, nitrogen: 0.15-0.3%, rare earth elements: 0.1-0.5%, and the balance is iron.

[0021] Three heats of steel were cast in an intermediate frequency induction furnace, and their chemical compositions are shown in Table 1:

[0022] Table 1 enumerates the proportioning of three groups of different qualities within the scope of the present invention

[0023] C Cr Ni Si mn N RE Fe NO.1 0.33 26.20 8.62 1.50 1.23 0.21 0.42 margin NO.2 0.38 25.98. 8.40 1.43 1.30 0.17 0.44 margin NO.3 0.35 26.13 8.51 1.61 1.28 0.19 0.40 margin

[0024] After the furnace steel ...

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Abstract

The invention relates to austenitic stainless steel, and in particular relates to austenitic heat-resistant stainless steel and a processing method thereof. The austenitic heat-resistant stainless steel is characterized by comprising the following elements by mass percentage: 0.25-0.45% of carbon, 0.5-2% of silicon, 0.5-2% of manganese, 23-27% of chromium, 6-10% of nickel, 0.15-0.3% of nitrogen, 0.1-0.5% of rare-earth (RE) elements and the balance of iron. The austenitic heat-resistant stainless steel obtained by the processing method has the advantages of good high-temperature oxidation resistance, good carburizing resistance, good sulfurization corrosion resistance and lowered production cost.

Description

technical field [0001] The invention relates to an austenitic stainless steel, in particular to an austenitic heat-resistant stainless steel and a processing method thereof. Background technique [0002] Austenitic stainless steel refers to stainless steel with austenitic structure at room temperature. When the steel contains about 18% Cr, 8%~10% Ni, and about 0.1% C, it has a stable austenite structure. Austenitic chromium-nickel stainless steel includes the famous 18Cr-8Ni steel and the high Cr-Ni series steel developed on the basis of increasing Cr and Ni content and adding Mo, Cu, Si, Nb, Ti and other elements. This kind of austenitic stainless steel is widely used in metallurgy, electric power, petroleum, chemical and other industrial sectors, such as boiler burners in thermal power plants, high-temperature control butterfly valves in sulfuric acid systems and other heat-resistant parts. These heat-resistant steel parts are exposed to oxidizing gases (O 2 、H 2 O, CO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/40C22C38/58C21D8/00
Inventor 张智丹刘焕安欧阳明辉
Owner XUANDA IND GRP
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