The process for 0.30 mm sheet of conventional grain-oriented silicon steel (/% ： 0.03-0.05C

3.0Si

0.065-0.080Mn

0.004-0.007P

0.018-0.025S

0.02Cu) produced by two-stage fold rolling and inter annealing from 2.20-2.30 mm hot rolled plate has been studied to focus analysis on the effect of chemical composition ( C

Mn

S

P)

heating temperature ( 1350-1400 °C and 1200-1320 °C )

use of normalizing process

second cold rolling reduction (56%-62% ) and secondary recrystallization temperature (900-1000 °C ) on iron loss P

17

and magnetic induction B

8

of conventional grain-oriented silicon steel. Results show that the effect of chemical composition

heating temperature and secondary recrystallization temperature on magnetic properties of

conventional grain-oriented silicon steel is obvious

and the normalization process and cold rolling process plate thickness on magnetic properties of steel is not appreciable ； for conventional grain-oriented silicon steel the suitable range of chemical composition is (/%：) 0.03-0.05C

2.9-3.1Si

0.05-0.10Mn

0.015- 0.03S

the heating temperature for hot rolling is 〜1380 °C

finishing rolling at 930 ~ 960 °C

secondary recrystallization temperature 〜950 °C .