| 摘要 |
A soft cold rolled steel plate, employing as the starting material a slab which is composed of the low carbon steel added a little content of tungsten, comprises 0.02-0.1 wt.% carbon, less than 0.3 wt.% manganese, less than 0.02 wt.% sulphur, less than 0.005 wt.% nitrogen, 0.03-0.07 wt.% aluminum, 0.01-0.20 wt.% tungsten, inevitable impurities and the balance of iron. The cold rolled steel is prepared by (a) soaking the slab continuously casted by Al-killed method at 1050-1150 deg.C, (b) finish rolling the slab at the temperature of Ar3, (c) after hot rolling to wind the slab steel at 650-750 deg.C, and cold rolling, and (d) continuously tempering at 800-850 deg.C.
|
