METHOD FOR PRODUCING A MAGNETIC CORE WITH IMPROVED ELECTRICAL PROPERTIES
A method is provided for producing a magnetic core. A semi-processed cold rolled electrical steel is provided comprising .005 ≦ Tin ≦ .09% .0 < Carbon ≦ 0.050% .10 ≦ Manganese ≦ 1.00% .005 ≦ Phosphorus ≦ .120% .0 < Sulfur ≦ .010% .50 ≦ Silicon ≦ 2.50% .01 ≦ Aluminum ≦ 1.60% .0 ≦ Antimony < .02% Iron—at least substantial portion of balance. The semi-processed electrical steel is stamped to create stamped parts. The stamped parts are assembled and annealed after the stamping to form the magnetic core.
1 . A method for producing a magnetic core, comprising the steps of:
providing a semi-processed cold rolled electrical steel comprising
.005 ≦ Tin ≦ .09%
.0 < Carbon ≦ 0.050%
.10 ≦ Manganese ≦ 1.00%
.005 ≦ Phosphorus ≦ .120%
.0 < Sulfur ≦ .010%
.50 ≦ Silicon ≦ 2.50%
.01 ≦ Aluminum ≦ 1.60%
.0 ≦ Antimony < .02%
Iron—at least substantial portion of balance;
stamping the semi-processed electrical steel to create stamped parts; and
assembling and annealing the stamped parts after the stamping to form the magnetic core.
2 . The method of claim 1 wherein at least one of the elements selected from the group consisting of copper, nickel, chromium, and molybdenum is additionally present in the electrical steel.
3 . The method of claim 1 wherein the stamped parts are annealed before the parts are assembled to form the core.
4 . The method of claim 3 wherein the stamped parts are annealed after the stamped parts are assembled to form the core.