Thermal flattening semi-processed electrical steel

Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

148113, H01F 104

Patent

active

050965107

ABSTRACT:
The thermal flattening of grain oriented silicon steel which is in the semi-processed condition has improved magnetic properties after a stress relief anneal by using a low temperature and high tension flattening anneal. The flattening process is conducted at a temperature between 1000.degree. to 1435.degree. F. (540.degree. to 780.degree. C.) with a tension selected to produce a yield strength/tension ratio from above 5 to about 20 and preferably from 7 to 13. The yield strength of the material will vary depending on the length of the time at peak temperature but are typically from 400 to 4000 psi (29,200 to 292,000 gm/cm.sup.2). The material as thermally flattened will have at least about 10% stress. After a stress relief anneal above about 1450.degree. F. (785.degree. C.), the material has significantly improved core loss compared to conventional thermally flattened material. The material is particularly suited for wound transformer core applications.

REFERENCES:
patent: 2104169 (1938-06-01), Schorschu
patent: 2282163 (1942-11-01), Burgwin
patent: 2351922 (1944-06-01), Burgwin
patent: 2412041 (1946-09-01), Gifford et al.
patent: 2980561 (1961-04-01), Ford et al.
patent: 3130088 (1964-05-01), Cook
patent: 3161225 (1964-04-01), Ward et al.
patent: 3421925 (1969-01-01), Hair et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Thermal flattening semi-processed electrical steel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thermal flattening semi-processed electrical steel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal flattening semi-processed electrical steel will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1473001

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.