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Heat-resistant austenitic stainless steel sheet

An austenitic, stainless steel plate technology, used in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve the problem of no stainless steel plates, and achieve the effects of excellent oxidation resistance, excellent workability, and excellent heat resistance.

Active Publication Date: 2015-11-11
NIPPON STEEL STAINLESS STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, so far there is no stainless steel plate that can be used at a maximum temperature of 1100°C

Method used

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  • Heat-resistant austenitic stainless steel sheet
  • Heat-resistant austenitic stainless steel sheet

Examples

Experimental program
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Effect test

Embodiment

[0066] In this example, first, steel having the composition shown in Table 1A and Table 1B was melted and cast into a slab. After the slab is heated to 1150 to 1250°C, the finishing temperature is set in the range of 850 to 950°C and hot rolled to a thickness of 3 to 5 mm. Then, they were annealed at 1000 to 1200°C, cold rolled to 1.5 mm after pickling, and then annealed and pickled at 1000°C to 1200°C as the test steel. In Table 1A and Table 1B, values ​​that deviate from the scope of the present invention are underlined.

[0067] The cold-rolled and annealed sheets obtained in this way were subjected to tensile tests and intermittent oxidation tests at room temperature and high temperature. Tensile test at room temperature is used to evaluate workability. According to JISZ2201 (corresponding to the international standard: ISO6892, 1984), JIS13B test pieces with the direction parallel to the rolling direction as the length direction are used, according to JISZ2241 (correspondin...

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Abstract

This heat-resistant austenitic stainless steel sheet contains, in mass%, 0.05-0.15% of C, 1.0-3.5% of Si, 0.5-2.0% of Mn, 0.04% or less of P, 0.01% or less of S, 23.0-26.0% of Cr, 10.0-15.0% of Ni, 0.50-1.20% of Mo, 0.1% or less of Ti, 0.01-0.10% of Al and 0.10-0.30% of N, with the total of C and N (C + N) being 0.25-0.35% and with the balance made up of Fe and unavoidable impurities. This heat-resistant austenitic stainless steel sheet can be used in a high temperature environment where the highest temperature reaches 1,100°C.

Description

Technical field [0001] The present invention relates to a heat-resistant austenitic stainless steel plate that can be used in a high-temperature environment with a maximum temperature of 1100°C. [0002] This application claims priority based on Japanese Patent Application No. 2013-069220 filed to Japan on March 28, 2013, and the content is used here. Background technique [0003] With the strengthening of vehicle exhaust restrictions in recent years, there is a tendency to pursue higher engine efficiency. If the combustion efficiency of the engine is to be improved, the exhaust gas temperature tends to rise. In addition, the use of superchargers represented by turbochargers also tends to increase greatly. Therefore, components such as exhaust headers and turbocharger covers are required to have more excellent heat resistance. As a future trend, it is assumed that the exhaust gas temperature will reach 1100°C. In the past, if it reaches this temperature range, stainless steel p...

Claims

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Application Information

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IPC IPC(8): C22C38/00C22C38/58
CPCC22C38/00C21D6/004C21D8/0226C21D8/0236C21D8/0273C21D9/46C22C38/001C22C38/008C22C38/04C22C38/06C22C38/34C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/52C22C38/54C22C38/58C21D2211/001C22C38/002C22C38/18
Inventor 井上宜治平出信彦矢川敦久
Owner NIPPON STEEL STAINLESS STEEL CORP
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