Electrical steel processing without a post cold-rolling intermediate anneal

A method of manufacturing a stamped part formed from an electrical steel, the method comprising:

• hot rolling a steel slab in one or more hot rolling passes into a steel sheet;
• annealing the steel sheet after the hot rolling, wherein the annealing after the hot rolling is a batch annealing process, and wherein the annealing after the hot rolling is performed at a post hot rolling annealing temperature that is greater than or equal to 1550 degrees Fahrenheit;
• cold rolling the steel sheet in one or more cold rolling passes after the annealing after the hot rolling;
• wherein the steel sheet is stamped into the stamped part and annealed after stamping without an intermediate annealing process after the cold rolling and before the stamping and the annealing after the stamping, and wherein the annealing after the stamping is performed at a post stamping annealing temperature that is greater than or equal to 1550 degrees Fahrenheit;
• wherein the stamped part comprises:
• silicon (Si) in a range of 2.6-3.5% weight;
• aluminum (Al) in a range of 0.15-1% weight;
• manganese (Mn) in a range of 0.005-1% weight;
• carbon (C) less than or equal to 0.04% weight;
• antimony (Sb) or Tin (Sn) less than or equal to 0.1% weight;
• and
• wherein the remainder of the composition of the stamped part comprises unavoidable impurities and iron;
• and
• wherein the stamped part has a permeability greater than or equal to 1400 G/Oe and a core loss less than or equal to 1.8 W/lb after the annealing after the stamping in all directions in the stamped part.

A stamped part formed from an electrical steel, the stamped part comprising:

• silicon (Si) in a range of 2.0-2.6% weight;
• aluminum (Al) in a range of 0.15-1% weight;
• manganese (Mn) in a range of 0.005-1% weight;
• carbon (C) less than or equal to 0.04% weight;
• antimony (Sb) or Tin (Sn) less than or equal to 0.1% weight;
• and
• wherein the remainder of the composition of the stamped part comprises unavoidable impurities and iron;
• wherein the stamped part is formed from a steel sheet that is produced by:
• hot rolling a steel slab in one or more hot rolling passes into the steel sheet;
• annealing the steel sheet after the hot rolling, wherein the annealing after the hot rolling is a batch annealing process, and wherein the annealing after the hot rolling is performed at a post hot rolling annealing temperature that is greater than or equal to 1550 degrees Fahrenheit;
• cold rolling the steel sheet in one or more cold rolling passes after the annealing after the hot rolling;
• and
• wherein the steel sheet is stamped into the stamped part and annealed after stamping without an intermediate annealing process after the cold rolling and before the stamping and the annealing after the stamping, and wherein the annealing after the stamping is performed at a post stamping annealing temperature that is greater than or equal to 1550 degrees Fahrenheit;
• and
• wherein the stamped part has a permeability greater than or equal to 2000 G/Oe and a core loss less than or equal to 1.8 W/lb after the annealing after the stamping in all directions of the stamped part.

A stamped part formed from an electrical steel, the stamped part comprising:

• silicon (Si) in a range of 2.6-3.5% weight;
• aluminum (Al) in a range of 0.15-1% weight;
• manganese (Mn) in a range of 0.005-1% weight;
• carbon (C) less than or equal to 0.04% weight;
• antimony (Sb) or Tin (Sn) less than or equal to 0.1% weight;
• and
• wherein the remainder of the composition of the stamped part comprises unavoidable impurities and iron;
• wherein the stamped part is formed from a steel sheet that is produced by:
• hot rolling a steel slab in one or more hot rolling passes into the steel sheet;
• annealing the steel sheet after the hot rolling, wherein the annealing after the hot rolling is a batch annealing process, and wherein the annealing after the hot rolling is performed at a post hot rolling annealing temperature greater than or equal to 1550 degrees Fahrenheit;
• cold rolling the steel sheet in one or more cold rolling passes after the annealing after the hot rolling;
• and
• wherein the steel sheet is stamped into the stamped part and annealed after stamping without an intermediate annealing process after the cold rolling and before the stamping and the annealing after stamping, and wherein the annealing after the stamping is performed at a post stamping annealing temperature that is greater than or equal to 1550 degrees Fahrenheit;
• and
• wherein the stamped part has a permeability greater than or equal to 1400 G/Oe and a core loss less than or equal to 1.8 W/lb in all directions of the stamped part.