Influence Factors of Reverse Bend Test for Electrical Steel

The reverse bend number is an important performance of electrical steels′ capabilities, affecting the machining performance directly when the customers used. It investigated some factors, such as sample′s width, sample′s tension load, grain orientation and equipment, how to effect the reverse bend test for electrical steel, measured the influence degree, and discussed the reason, in order to form basic rules which could be guided the manufacturing and using for electrical steel. Results showed that the reverse bend number would increase while the sample′s width increased, and the grain orientation greatly affected the bend number of grain-oriented electrical steel, and the bend number reduced when the interval between stationary jaws and movable jaws decreased or the tension load increased, but it had no obvious influence if the tension load up to 60 N, and also the bend number increased slightly after annealed.