FERRITIC STAINLESS STEEL PLATE WHICH HAS EXCELLENT RIDGING RESISTANCE AND METHOD OF PRODUCTION OF SAME

• Main Authors: ISHIMARU Eiichiro, KIMURA Ken, TERAOKA Shinichi, HATANO Masaharu, TAKAHASHI Akihiko
• Format: Patent
• Language: English
• Published: 07.12.2017
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The present invention focuses on Sn and has as its problem to not only improve the corrosion resistance and rust resistance of Cr-containing ferritic stainless steel but also improve the ridging resistance. The present invention derives the relationship between Ap, which shows the ³-phase rate at 1100°C due to a predetermined ingredient, and Sn in ferritic stainless steel which becomes a dual phase structure of ±+³ in the hot rolling temperature region, applies and adds Sn, and hot rolls the steel to give a total rolling rate of 15% or more in 1100°C or higher hot rolling to thereby obtain ferritic stainless steel sheet which has good ridging resistance, which also has excellent corrosion resistance and rust resistance, and which can be applied to general durable consumer goods: 0.060 ‰¤ Sn ‰¤ 0.634 - 0.0082 ¢ Ap 10 ‰¤ Ap ‰¤ 70