Patents by Inventor Frank A. Malagari, Jr.
Frank A. Malagari, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4693762Abstract: A method is provided for final texture annealing silicon steel to produce a cube-on-edge grain orientation having lower core losses and higher magnetic permeability. The method includes using a controlled heating cycle including a substantially isothermal hold at a selected recrystallization temperature of about 1650.degree. F. to improve secondary recrystallization and the Goss texture (110) [001].Type: GrantFiled: August 8, 1985Date of Patent: September 15, 1987Assignee: Allegheny Ludlum CorporationInventor: Frank A. Malagari, Jr.
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Patent number: 4608100Abstract: A method is provided for producing thin gauge cube-on-edge grain-oriented silicon steel from hot-rolled band to final gauge in two cold reduction steps. The two-stage cold reduction process requires an intermediate anneal between the two stages of cold reduction and requires that the cold working of the desired intermediate gauge to final gauge include a cold reduction of at least 55% to provide a final gauge product of nominally 0.007 inch.A cube-on-edge grain-oriented silicon steel product is also provided.Type: GrantFiled: November 21, 1983Date of Patent: August 26, 1986Assignee: Allegheny Ludlum Steel CorporationInventor: Frank A. Malagari, Jr.
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Patent number: 4337101Abstract: A process for producing electromagnetic silicon steel having a cube-on-edge orientation and a permeability of at least 1800 (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 0.008% boron, up to 0.01% nitrogen, up to 0.008% aluminum and from 2.5% to 4.0% silicon, casting the steel, hot rolling the steel to hot band gage, annealing the hot band in a temperature range of from 1450.degree.-1650.degree. F., cold rolling the steel to a final gage of about 0.018 inch in one cold reduction, decarburizing the steel, applying a refractory oxide base coating to the steel and texture annealing the steel.Type: GrantFiled: August 18, 1980Date of Patent: June 29, 1982Assignee: Allegheny Ludlum Steel CorporationInventor: Frank A. Malagari, Jr.
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Patent number: 4244757Abstract: 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 containing from 0.02 to 0.06% carbon, from 0.015 to 0.15% manganese, from 0.0006 to 0.0080% boron, up to 0.0045% nitrogen, from 0.005 to 0.019% sulfur, no more than 0.0065% phosphorus and from 2.5 to 4.0% silicon; casting the steel; hot rolling the steel; welding the steel to another steel member of like chemistry; cold rolling the steel to a thickness no greater than 0.020 inch; decarburizing the steel; applying a refractory oxide coating to the steel; and final texture annealing the steel.Type: GrantFiled: May 21, 1979Date of Patent: January 13, 1981Assignee: Allegheny Ludlum Steel CorporationInventors: Frank A. Malagari, Jr., Richard P. Schrecongost
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Patent number: 4157925Abstract: 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 containing from 0.02 to 0.06% carbon, from 0.015 to 0.15% manganese, from 0.005 to 0.05% of material from the group consisting of sulfur and selenium, from 0.0006 to 0.0080% boron, up to 0.0100% nitrogen, up to 1.0% copper, less than 0.005% antimony, less than 0.009% aluminum and from 2.5 to 4.0% silicon; casting; hot rolling; cold rolling; decarburizing; applying a refractory oxide base coating; and final texture annealing. During final texture annealing the steel is heated from a temperature of 1700.degree. F. to a temperature of 1900.degree. F. at an average rate of less than 30.degree. F. per hour, and subsequently maintained at a temperature in excess of 2000.degree. F. for a period of time sufficient to effect a purification of the steel.Type: GrantFiled: April 12, 1978Date of Patent: June 12, 1979Assignee: Allegheny Ludlum Industries, Inc.Inventors: Frank A. Malagari, Jr., Robert F. Miller, Jack W. Shilling, James H. Wells
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Patent number: 4078952Abstract: 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. Involved therein are the steps of cold rolling a hot rolled band to final gage without an intermediate anneal between cold rolling passes; and preparing said band from a melt having 0.0006 to 0.0018% boron, and manganese and sulfur contents which produce a manganese to sulfur ratio of at least 1.83 in said band.Type: GrantFiled: June 17, 1976Date of Patent: March 14, 1978Assignee: Allegheny Ludlum Industries, Inc.Inventor: Frank A. Malagari, Jr.
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Patent number: 4054470Abstract: A hot rolled band suitable for processing into cube-on-edge oriented silicon steel having a permeability of at least 1870 (G/O.sub.e) at 10 oersteds and a core loss of no more than 0.700 watts per pound at 17 kilogauss; and processing for the steel from which the band is made. The hot rolled band has a thickness of from about 0.050 to about 0.120 inch; and consists essentially of, by weight, 0.02 to 0.06% carbon, 0.015 to 0.15% manganese, 0.01 to 0.05% of material from the group consisting of sulfur and selenium; 0.0006 to 0.0080% boron, up to 0.0100% nitrogen, 2.5 to 4.0% silicon, between 0.3 and 1.0% copper, no more than 0.008% aluminum, balance iron. Processing includes the steps of cold rolling the steel band to a thickness no greater than 0.020 inch without an intermediate anneal between cold rolling passes; preparing several coils from the steel; decarburizing the steel and final texture annealing the steel. Essential to the invention is the inclusion of a controlled amount of copper in the melt.Type: GrantFiled: June 17, 1976Date of Patent: October 18, 1977Assignee: Allegheny Ludlum Industries, Inc.Inventor: Frank A. Malagari, Jr.
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Patent number: 4030950Abstract: 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; normalizing said steel at a temperature of from 1300.degree. to 2000.degree. F in a hydrogen-bearing atmosphere having a dew point of from +20.degree. to +110.degree. F; applying a refractory oxide base coating to said steel; and final texture annealing said steel. The variables of time, temperature and dew point are monitored during normalizing so as to result in a steel having at least 320 parts per million of oxygen, based on the total weight of the steel, within 10 microns of the surfaces of said steel.Type: GrantFiled: June 17, 1976Date of Patent: June 21, 1977Assignee: Allegheny Ludlum Industries, Inc.Inventors: Jack W. Shilling, Amitava Datta, Frank A. Malagari, Jr.
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Patent number: 4000015Abstract: 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 containing from 0.02 to 0.06% carbon, from 0.0006 to 0.0080% boron, up to 0.0100% nitrogen and from 2.5 to 4.0% silicon; casting said steel; hot rolling said steel; cold rolling said steel; decarburizing said steel to a carbon level below 0.02% in a hydrogen-bearing atmosphere havng a dew point of from +20.degree. F to +60.degree. F; and final texture annealing said steel.Type: GrantFiled: May 15, 1975Date of Patent: December 28, 1976Assignee: Allegheny Ludlum Industries, Inc.Inventor: Frank A. Malagari, Jr.
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Patent number: 3954521Abstract: The application describes a process for producing grain oriented silicon steel wherein advantages are realized from the utilization of starting material with a relatively high carbon content. The process involves a series of steps including hot rolling, heat treating, cold rolling, normalizing, decarburizing and annealing.Type: GrantFiled: August 19, 1974Date of Patent: May 4, 1976Assignee: Allegheny Ludlum Industries, Inc.Inventor: Frank A. Malagari, Jr.