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Ferrite-based stainless steel plate, steel pipe, and production method therefor

A manufacturing method, stainless steel technology, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of undisclosed hot rolling conditions, etc., and achieve the effects of excellent formability, increased degree of freedom in forming, and effective component manufacturing

Active Publication Date: 2017-05-31
NIPPON STEEL STAINLESS STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Describes the case where the hot-rolled sheet is annealed and the case where the hot-rolled sheet is not annealed, and does not disclose the hot-rolled conditions when the hot-rolled sheet is not annealed

Method used

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  • Ferrite-based stainless steel plate, steel pipe, and production method therefor
  • Ferrite-based stainless steel plate, steel pipe, and production method therefor
  • Ferrite-based stainless steel plate, steel pipe, and production method therefor

Examples

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Embodiment

[0169] Examples of the above-mentioned first aspect of the invention will be described below.

[0170] The steels with the composition shown in Table 1-1 and Table 1-2 are melted and cast into slabs, and after hot rolling, cold rolling, intermediate annealing, final cold rolling, and final annealing are performed without annealing the hot-rolled slabs, A product plate of 1.2 mmt was obtained. In addition, regarding the hot rolling conditions, the rough reduction rate / finish reduction rate were also studied, and the characteristics of each steel were investigated. Each steel was manufactured under the manufacturing conditions shown in Table 2-1, Table 2-2, and Table 2-3. The evaluation methods of {111} strength and {411} strength, average r value, and wrinkling in the vicinity of the plate thickness center are as described above.

[0171]

[0172]

[0173]

[0174]

[0175]

[0176] The steel of the example of the present invention has a high r value and a low ...

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Abstract

Provided are a ferrite-based stainless steel plate and steel pipe that serve as raw material for heat-resistant components requiring particularly excellent molding properties, same being provided as a result of the ferrite-based stainless steel containing 10%-20% by mass Cr, a prescribed amount of C, Si, Mn, P, S, and Al, and a prescribed amount of at least one type of Ti and Nb, said ferrite-based stainless steel having, in the vicinity of the plate thickness center section, a {111} strength of at least 5 and a {411} strength of less than 3. In addition, as a result of having similar components and having a {111} <110> orientation strength of at least 4.0 and a {311} <136>; orientation strength of less than 3.0, a ferrite-based stainless steel plate and steel pipe can be obtained that have excellent molding properties and whereby rm >=-1.0t + 3.0 when the plate thickness is t (mm) and the average r value is rm.

Description

technical field [0001] The present invention relates to a ferritic stainless steel sheet and steel pipe as raw materials for heat-resistant parts requiring particularly excellent formability, a ferritic stainless steel sheet and steel pipe as raw materials for formed articles requiring particularly excellent formability, and their Production method. Background technique [0002] Ferritic stainless steel sheets are used in a wide range of fields such as home appliances, kitchen equipment, and electronic equipment. For example, in recent years, application of stainless steel sheets has been studied as raw materials for exhaust pipes of automobiles and motorcycles, fuel tanks, and pipes. These parts are required to have high processability for molding in addition to corrosion resistance and heat resistance in exhaust gas environment and fuel environment. However, ferritic stainless steel sheets are lower in cost than austenitic stainless steel sheets, but are inferior in form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/00C21D9/46C22C38/28C22C38/60
CPCC22C38/00C22C38/28C22C38/60C21D9/46C21D6/004C21D6/005C21D6/008C21D8/0205C21D8/0226C21D8/0236C21D8/0268C21D2211/005C22C38/001C22C38/002C22C38/005C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54
Inventor 滨田纯一西村航荒木纯福田望田上利男
Owner NIPPON STEEL STAINLESS STEEL CORP
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