| 摘要 |
PROBLEM TO BE SOLVED: To increase dimensional precision after punching non-oriented electromagnetic steel, prevent magnetic aging, and positively improve iron loss. SOLUTION: In the non-oriented electromagnetic steel, the following elements are contained by weight ratio: C: at most 0.01%, Si: at most 3.2%, Mn: at most 1.0%, S: at most 0.01%, Sol. Al: 0.01-2.0%, P: 0.005-0.1%, and Ti: more than or equal to 0.001% and less than 0.05%. The rest is composed of Fe and unavoidable impurities. Magnetic aging which is the trouble as the result of containing C and adding P when dimensional precision after punching is increased is effectively restrained by adding very small quantity of Ti. By adding Ti, the increase of iron loss which makes trouble is prevented and the iron loss is also positively improved. |
