Clarence Allan Miller

US Patent:

41719948, Oct 23, 1979

Filed:

Nov 22, 1976

Appl. No.:

5/743876

Inventors:

Clarence L. Miller - Pittsburgh PA

Assignee:

Allegheny Ludlum Industries, Inc. - Pittsburgh PA

International Classification:

H01F 104

US Classification:

148111

Abstract:

A process for producing silicon steel having a cube-on-edge orientation and a permeability of at least 1850 (G/O. sub. e) at 10 oersteds, which includes the steps of: preparing a melt of steel consisting essentially of, by weight, up to 0. 07% carbon, from 2. 6 to 4. 0% silicon, from 0. 03 to 0. 24% manganese, from 0. 01 to 0. 09% of material from the group consisting of sulfur and selenium, at least one element from the group consisting of aluminum in an amount of from 0. 015 to 0. 04% and boron in an amount of up to 0. 0035%, up to 0. 02% nitrogen, up to 0. 5% copper, balance iron; casting the steel, hot rolling the steel, cold rolling the steel, decarburizing the steel, coating the steel with a base coating containing a nitrogen-bearing compound from the group consisting of (NH. sub. 4). sub. 2 SO. sub. 4, Fe(NO. sub. 3). sub. 3, Al(NO. sub. 3). sub. 3, Mg(NO. sub. 3). sub. 2 and Zn(NO. sub. 3). sub. 2, and final texture annealing the steel.

US Patent:

43671004, Jan 4, 1983

Filed:

Oct 15, 1979

Appl. No.:

6/085094

Inventors:

Clarence L. Miller - Pittsburgh PA

Assignee:

Allegheny Ludlum Steel Corporation - Pittsburgh PA

International Classification:

H01F 104

US Classification:

148113

Abstract:

A process for producing grain oriented electromagnetic silicon steel. The process includes the steps of: preparing a melt of silicon steel having, by weight, from 2. 5 to 4. 0% silicon; casting the steel; hot rolling the steel; cold rolling the steel; decarburizing the steel; applying a substantially non-reactive aluminum hydroxide coating to the steel; and final texture annealing the steel. The annealed steel being characterized by a substantially uniform metallic surface.

US Patent:

42004772, Apr 29, 1980

Filed:

Mar 16, 1978

Appl. No.:

5/887098

Inventors:

Amitava Datta - Pittsburgh PA
Clarence L. Miller - Pittsburgh PA
Jack W. Shilling - Monroeville PA

Assignee:

Allegheny Ludlum Industries, Inc. - Pittsburgh PA

International Classification:

H01F 104

US Classification:

148113

Abstract:

A process for producing electromagnetic silicon steel having a cube-on-edge orientation. The process includes the steps of: preparing a melt of silicon steel having up to 0. 07% carbon, from 0. 01 to 0. 25% manganese, from 0. 01 to 0. 09% of material from the group consisting of sulfur and selenium, from 2. 5 to 4. 0% silicon, up to 1. 0% copper, less than 0. 009% aluminum and less than 0. 0006% boron; casting the steel; hot rolling the steel; cold rolling the steel; normalizing the steel in a hydrogen-bearing atmosphere having a pH. sub. 2 O/pH. sub. 2 of from 0. 015 to 0. 3; applying a refractory oxide coating containing an oxide less stable than SiO. sub. 2 at temperatures up to 2150. degree. F. ; and final texture annealing the steel.

US Patent:

41606817, Jul 10, 1979

Filed:

Dec 27, 1977

Appl. No.:

5/864363

Inventors:

Clarence L. Miller - Pittsburgh PA

Assignee:

Allegheny Ludlum Industries, Inc. - Pittsburgh PA

International Classification:

H01F 104

US Classification:

148111

Abstract:

A process for producing electromagnetic silicon steel having a cube-on-edge orientation. The steel has a permeability of at least 1870 (G/O. sub. e) at 10 oersteds and a core loss of no more than 0. 720 watts per pound at 17 kilogauss - 60 Hz. The process includes the steps of: preparing a melt of silicon steel containing from 0. 02 to 0. 06% carbon, from 0. 0006 to 0. 0080% boron, up to 0. 0100% nitrogen, no more than 0. 008% aluminum and from 2. 5 to 4. 0% silicon; casting said steel; hot rolling said steel; cold rolling said steel; decarburizing said steel; applying a refractory oxide coating containing both boron and manganese sulfate; and final texture annealing said steel.

US Patent:

41027132, Jul 25, 1978

Filed:

Jun 17, 1976

Appl. No.:

5/696967

Inventors:

Jack W. Shilling - Monroeville PA
Clarence L. Miller - Pittsburgh PA
Amitava Datta - Pittsburgh PA

Assignee:

Allegheny Ludlum Industries, Inc. - Pittsburgh PA

International Classification:

H01F 104

US Classification:

148113

Abstract:

A process for producing electromagnetic silicon steel having a cube-on-edge orientation and a permeability of at least 1870 (G/O. sub. e) at 10 oersteds. The process includes the steps of: preparing a melt of silicon steel containing from 0. 02 to 0. 06% carbon, from 0. 0006 to 0. 0080% boron, up to 0. 0100% nitrogen, no more than 0. 008% aluminum and from 2. 5 to 4. 0% silicon; casting said steel; hot rolling said steel; cold rolling said steel; decarburizing said steel; applying a refractory oxide coating containing both boron and an oxide less stable than SiO. sub. 2 at temperatures up to 2150. degree. F; and final texture annealing said steel.

US Patent:

41793153, Dec 18, 1979

Filed:

Jan 12, 1978

Appl. No.:

5/868956

Inventors:

Clarence L. Miller - Pittsburgh PA

Assignee:

Allegheny Ludlum Industries, Inc. - Pittsburgh PA

International Classification:

H01F 104

US Classification:

148113

Abstract:

A process for producing electromagnetic silicon steel having a cube-on-edge orientation and a permeability of at least 1870 (G/O. sub. e) at 10 oersteds. The process includes the steps of: preparing a melt of a silicon steel containing from 0. 02 to 0. 06% carbon, from 0. 0006 to 0. 0080% boron, up to 0. 0100% nitrogen, no more than 0. 008% aluminum and from 2. 5 to 4. 0% silicon; casting said steel; hot rolling said steel; cold rolling said steel; decarburizing said steel; applying a refractory oxide coating containing both boron and SiO. sub. 2 ; and final texture annealing said steel.