Title:
AL ALLOY SHEET FOR NEGATIVE PRESSURE CAN STAY ON TAB TYPE END, EXCELLENT IN CAN OPENABILITY, AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP2783311
Kind Code:
B2
Abstract:
PURPOSE: To produce an Al alloy sheet for negative pressure can SOT type end, excellent in can openability particularly after retorting and repairing.
CONSTITUTION: An alloy, which has a composition containing, as essential components, 1.80-2.70% Mg, 0.30-0.75% Mn, 0.10-0.60% Fe, and 0.10-0.60% Si, further containing, if necessary, one or ≥2 kinds among ≤0.40% Cr, ≤0.20% Ti, ≤0.20% Cu, and ≤0.20% Zn, and having the balance Al with inevitable impurities, is used. Moreover, when viewed from the surface of a product sheet, the space factor of Al-Fe-Mn type crystallized substances of 3-20μm and the space factor of Mg-Si type crystallized substances of 1-15μm are regulated to be 0.5-1.5% and 0.1-1.0%, respectively. An ingot of Al alloy with the above chemical composition is subjected to homogenizing heat treatment, hot-rolled, cold-rolled at ≥30%, process-annealed under the conditions of ≥100°C/min heating and cooling rate as sheet body temp., 400-570°C ultimate temp., and ≤5min holding time, and then cold-rolled at 30-80% rolling rate, thereby strength can be regulated without finish annealing.
Inventors:
OKAMOTO FUMITO
INABA TAKASHI
HIROSE SHIGEO
INABA TAKASHI
HIROSE SHIGEO
Application Number:
JP12539093A
Publication Date:
August 06, 1998
Filing Date:
April 28, 1993
Export Citation:
Assignee:
KOBE SEIKOSHO KK
International Classes:
C22C21/06; C22F1/00; C22F1/04; C22F1/047; (IPC1-7): C22C21/06; C22F1/047
Domestic Patent References:
| JP6164847A | ||||
| JP4235248A | ||||
| JP4325659A | ||||
| JP1301831A |
Attorney, Agent or Firm:
Kaoru Kaoru