METHOD FOR PRODUCING FERRITIC STAINLESS STEEL SHEET EXCELLENT IN WORKABILITY

Title:

METHOD FOR PRODUCING FERRITIC STAINLESS STEEL SHEET EXCELLENT IN WORKABILITY

Document Type and Number:

Japanese Patent JP2010144191

Kind Code:

A

Abstract:

To provide a method for producing a ferritic stainless steel sheet stably having high elongation without reducing C, N, P, and reducing Ti addition quantity.

A steel slab containing, by mass, 0.005-0.015% C, 0.005-0.015% N, 0.025-0.050% P, 16.0-19.5% Cr and further Ti in the range of 0.20-0.40% and satisfying Ti≥15×(C+N) and Ti×P×104≥70, is subjected to a homogenizing heat treatment under a condition at 1,050-1,300°C for ≤50 hr and satisfying expression: T≥-100×log×t+14,000×√(Ti×P), (wherein, T: homogenizing temperature (°C), t: homogenizing time (hr), and Ti, P represent respective element contents (%)), and thereafter, the steel slab is subjected to hot rolling.

Inventors:

YAMAUCHI KATSUHISA
FUJISAWA MITSUYUKI
KATO YASUSHI
UGI TAKUMI

Application Number:

JP2008319434A

Publication Date:

July 01, 2010

Filing Date:

December 16, 2008

Export Citation:

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Assignee:

JFE STEEL CORP

International Classes:

C21D9/00; C21D9/46; C22C38/00; C22C38/54; C22C38/60

Attorney, Agent or Firm:

Junzo Ogawa
Morio Nakamura

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