Title:
PRODUCTION OF STEEL SHEET FOR SOFT VESSEL HAVING NON-AGING CHARACTERISTIC AND DEGREE OF REFINING OF T-3 OR BELOW
Document Type and Number:
Japanese Patent JP3135656
Kind Code:
B2
Abstract:
PURPOSE: To produce a steel sheet for soft vessel having the degree of refining of ≤(T-3) and also having non-aging characteristic equivalent to that of a batch-annealed steel sheet by means of a continuous annealing furnace.
CONSTITUTION: The hot slab of a steel which has a composition containing, by weight, ≤0.0015% C, ≤0.06% P, ≤0.10% acid soluble Al, ≤0.0060% N, and, besides the above, one or more kinds among 3.4×(N%-0.0010) to 0.02% Ti, 6.6×(N%-0.0010)% to 0.03% Nb, and 0.79×(N%-0.0010) to 0.0040% B is hot-rolled at ≥850°C finishing temp., cold-rolled, annealed in a continuous annealing furnace, and temper-rolled at 0.6-10% elongation percentage. By this method, the objective steel sheet for soft vessel with non-aging characteristic can be industrially produced even in a continuous annealing furnace free from overageing treatment, without being subjected to the restrictions of slab reheating temp. and winding temp. in the hot rolling stage.
Inventors:
Kuniaki Maruoka
Yoshikuni Furuno
Shiro Sayanagi
Yasuhiko Yamashita
Masayuki Matsuda
Yoshikuni Furuno
Shiro Sayanagi
Yasuhiko Yamashita
Masayuki Matsuda
Application Number:
JP1530592A
Publication Date:
February 19, 2001
Filing Date:
January 30, 1992
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C21D8/02; C21D9/46; C22C38/00; C22C38/14; (IPC1-7): C21D9/46; C22C38/00; C22C38/14
Domestic Patent References:
| JP6169928A | ||||
| JP2197523A | ||||
| JP2277722A | ||||
| JP152450B2 |
Attorney, Agent or Firm:
Hiroaki Tamura (1 outside)