SHEARING METHOD OF FERRITIC STAINLESS STEEL PLATE HAVING EXCELLENT SHEAR-END-FACE CORROSION RESISTANCE

Title:

SHEARING METHOD OF FERRITIC STAINLESS STEEL PLATE HAVING EXCELLENT SHEAR-END-FACE CORROSION RESISTANCE

Document Type and Number:

Japanese Patent JP2010137344

Kind Code:

A

Abstract:

To provide a shearing method for improving shearing-end-face corrosion resistance of a ferritic stainless steel plate used in the atmospheric environment without executing corrosion-resistant processing thereon.

A clearance is equal to or less than 12% for shearing the ferritic stainless steel plate which contains ≤0.02% C, 0.05-0.8% Si, 0.05-1.0% Mn, ≤0.04% P, ≤0.1% Al, 20-24% Cr, 0.3-0.8% Cu, 0.05-6.0% Ni, ≤0.02% N and 0.001-0.1% S. The average crystal grain size of a ferrite phase is ≥5 μm and ≤25 μm, and 50-400 particles of MnS having the particle size of ≥0.05 μm and ≤1 μm exist in 1 cm2, and the clearance (%) is (x/d)×100, (wherein x represents a gap (mm) between a blade and a stand, and d represents a thickness (mm) of the steel plate).

Inventors:

ISHII TOMOHIRO
ISHIKAWA SHIN
UGI TAKUMI

Application Number:

JP2008318131A

Publication Date:

June 24, 2010

Filing Date:

December 15, 2008

Export Citation:

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Assignee:

JFE STEEL CORP

International Classes:

B23D15/08; C22C38/00; C22C38/60; C21D9/46

Attorney, Agent or Firm:

Kenji Sugimura
Kiyoshi Kuruma
Takanashi Reiko

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