Title:
STEEL SHEET FOR EASY-OPEN CAN TOP EXCELLENT IN TOP OPENABILITY AND RIVET FORMABILITY, ITS PRODUCTION AND EASY-OPEN CAN TOP
Document Type and Number:
Japanese Patent JP3740779
Kind Code:
B
Abstract:
PROBLEM TO BE SOLVED: To obtain a steel sheet for an easy-open can cover excellent in pressure resistance, corrosion resistance, impact resistance, cover openability and revert formability by specifying the compsn. in which the contents of C, B, Al and O are regulated and composed of C, Si, Mn, S, B, Al, N, O and Fe.
SOLUTION: This steel sheet for an easy-open can cover is the one having a compsn. in which the contents of C and Al are regulated, contg., by weight, ≤0.02% C, ≤0.05% Si, ≤0.6% Mn, ≤0.020% S, 0.010 to 0.020% B, ≤0.010% Al, ≤0.02% N and 0.010 to 0.030% O, furthermore contg., at need, prescribed amounts of Nb, Ti Cr and Mo and the balance Fe with inevitable impurities, and the average grain size of B oxides is preferably regulated to 0.1 to 20μm. This steel sheet is obtd. by subjecting a steel slab having the above componental compsn. to hot rolling at ≥800°C finishing temp., coiling it at 450 to 700°C, executing primary cold rolling and recrystallization annealing and thereafter subjecting it to secondary cold rolling at ≤30% draft.
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Inventors:
Tosaka, Akio
Osawa, Kazunori
Araya, Masatoshi
Kukuminato, Hideo
Araya, Makoto
Osawa, Kazunori
Araya, Masatoshi
Kukuminato, Hideo
Araya, Makoto
Application Number:
JP1997000057786
Publication Date:
November 18, 2005
Filing Date:
March 12, 1997
Export Citation:
Assignee:
KAWASAKI STEEL CORP
International Classes:
C21D8/04; C22C38/00; C21D9/46; C22C38/06; C22C38/54; C21D8/04; C21D9/46; C22C38/00; C22C38/06; C22C38/54; (IPC1-7): C22C38/00; C21D8/04; C21D9/46; C22C38/06; C22C38/54