Patents by Inventor Bruce L. Bramfitt
Bruce L. Bramfitt 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: 10604819Abstract: A method of making a high strength head-hardened crane rail and the crane rail produced by the method. The method comprises the steps of providing a steel rail having a composition comprising, in weight percent: C 0.79-1.00%; Mn 0.40-1.00; Si 0.30-1.00; Cr 0.20-1.00; V 0.05-0.35; Ti 0.01-0.035; N 0.002 to 0.0150; and the remainder being predominantly iron. The steel rail is cooled from a temperature between about 700 and 800° C. at a cooling rate having an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 800° C.), (40 s, 700° C.), and (140 s, 600° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 700° C.), (40 s, 600° C.), and (140 s, 500° C.).Type: GrantFiled: October 25, 2016Date of Patent: March 31, 2020Assignee: ARCELORMITTAL INVESTIGACION Y DESARROLLO, S.L.Inventors: Bruce L. Bramfitt, Frederick B. Fletcher, Jason T McCullough, Michael A. Muscarella, John S. Nelson
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Publication number: 20190338386Abstract: A method of making a high strength head-hardened crane rail and the crane rail produced by the method. The method comprises the steps of providing a steel rail having a composition comprising, in weight percent: C 0.79-1.00%; Mn 0.40-1.00; Si 0.30-1.00; Cr 0.20-1.00; V 0.05-0.35; Ti 0.01-0.035; N 0.002 to 0.0150; and the remainder being predominantly iron. The steel rail is cooled from a temperature between about 700 and 800° C. at a cooling rate having an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 800° C.), (40 s, 700° C.), and (140 s, 600° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 700° C.), (40 s, 600° C.), and (140 s, 500° C.).Type: ApplicationFiled: October 25, 2016Publication date: November 7, 2019Inventors: Bruce L. Bramfitt, Frederick B. Fletcher, Jason T. McCullough, Michael A. Muscarella, John S. Nelson
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Publication number: 20180112284Abstract: A method of making a high strength head-hardened crane rail and the crane rail produced by the method. The method comprises the steps of providing a steel rail having a composition comprising, in weight percent: C 0.79-1.00%; Mn 0.40-1.00; Si 0.30-1.00; Cr 0.20-1.00; V 0.05-0.35; Ti 0.01-0.035; N 0.002 to 0.0150; and the remainder being predominantly iron. The steel rail is cooled from a temperature between about 700 and 800° C. at a cooling rate having an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 800° C.), (40 s, 700° C.), and (140 s, 600° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 700° C.), (40 s, 600° C.), and (140 s, 500° C.).Type: ApplicationFiled: October 25, 2016Publication date: April 26, 2018Inventors: Bruce L. Bramfitt, Frederick B. Fletcher, Jason T. McCullough, Michael A. Muscarella, John S. Nelson
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Patent number: 9512501Abstract: A method of making a hypereutectoid, head-hardened steel rail is provided that includes a step of head hardening a steel rail having a composition containing 0.86-1.00 wt % carbon, 0.40-0.75 wt % manganese, 0.40-1.00 wt % silicon, 0.05-0.15 wt % vanadium, 0.015-0.030 wt % titanium, and sufficient nitrogen to react with the titanium to form titanium nitride. Head hardening is conducted at a cooling rate that, if plotted on a graph with xy-coordinates with the x-axis representing cooling time in seconds, and the y-axis representing temperature in Celsius of the surface of the head of the steel rail, is maintained in a region between an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 775° C.), (20 s, 670° C.), and (110 s, 550° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 750° C.), (20 s, 610° C.), and (110 s, 500° C.).Type: GrantFiled: May 13, 2014Date of Patent: December 6, 2016Assignee: ArcelorMittal Investigacion y Desarrollo, S.L.Inventors: Bruce L. Bramfitt, Fred B. Fletcher, John A. Davis, Jr.
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Patent number: 9476107Abstract: A method of making a high strength head-hardened crane rail and the crane rail produced by the method. The method comprises the steps of providing a steel rail having a composition comprising, in weight percent: C 0.79-1.00%; Mn 0.40-1.00; Si 0.30-1.00; Cr 0.20-1.00; V 0.05-0.35; Ti 0.01-0.035; N 0.002 to 0.0150; and the remainder being predominantly iron. The steel rail is cooled from a temperature between about 700 and 800° C. at a cooling rate having an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 800° C.), (40 s, 700° C.), and (140 s, 600° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 700° C.), (40 s, 600° C.), and (140 s, 500° C.).Type: GrantFiled: November 15, 2013Date of Patent: October 25, 2016Assignee: ArcelormittalInventors: Bruce L. Bramfitt, Frederick B. Fletcher, Jason T McCullough, Michael A. Muscarella, John S. Nelson
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Publication number: 20140246130Abstract: A method of making a hypereutectoid, head-hardened steel rail is provided that includes a step of head hardening a steel rail having a composition containing 0.86-1.00 wt % carbon, 0.40-0.75 wt % manganese, 0.40-1.00 wt % silicon, 0.05-0.15 wt % vanadium, 0.015-0.030 wt % titanium, and sufficient nitrogen to react with the titanium to form titanium nitride. Head hardening is conducted at a cooling rate that, if plotted on a graph with xy-coordinates with the x-axis representing cooling time in seconds, and the y-axis representing temperature in Celsius of the surface of the head of the steel rail, is maintained in a region between an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 775° C.), (20 s, 670° C.), and (110 s, 550° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 750° C.), (20 s, 610° C.), and (110 s, 500° C.).Type: ApplicationFiled: May 13, 2014Publication date: September 4, 2014Applicant: ArcelorMittal Investigacion y Desarrollo, S.L.Inventors: Bruce L. BRAMFITT, Fred B. FLETCHER, John A. Davis, Jr.
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Publication number: 20140130943Abstract: A method of making a high strength head-hardened crane rail and the crane rail produced by the method. The method comprises the steps of providing a steel rail having a composition comprising, in weight percent: C, 0.79-1.00%; Mn, 0.40-1.00; Si, 0.30-1.00; Cr, 0.20-1.00; V, 0.05-0.35; Ti, 0.01-0.035; N, 0.002 to 0.0150; and the remainder being predominantly iron. The steel rail is cooled from a temperature between about 700 and 800° C. at a cooling rate having an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 800° C.), (40 s, 700° C.), and (140 s, 600° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 700° C.), (40 s, 600° C.), and (140 s, 500° C.).Type: ApplicationFiled: November 15, 2013Publication date: May 15, 2014Inventors: Bruce L. Bramfitt, Frederick B. Fletcher, Jason T McCullough, Michael A. Muscarella, John S. Nelson
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Patent number: 8721807Abstract: A method of making a hypereutectoid, head-hardened steel rail is provided that includes a step of head hardening a steel rail having a composition containing 0.86-1.00 wt % carbon, 0.40-0.75 wt % manganese, 0.40-1.00 wt % silicon, 0.05-0.15 wt % vanadium, 0.015-0.030 wt % titanium, and sufficient nitrogen to react with the titanium to form titanium nitride. Head hardening is conducted at a cooling rate that, if plotted on a graph with xy-coordinates with the x-axis representing cooling time in seconds, and the y-axis representing temperature in Celsius of the surface of the head of the steel rail, is maintained in a region between an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 775° C.), (20 s, 670° C.), and (110 s, 550° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 750° C.), (20 s, 610° C.), and (110 s, 500° C.).Type: GrantFiled: August 13, 2012Date of Patent: May 13, 2014Assignee: Arcelormittal Investigacion Y Desarrollo, S.L.Inventors: Bruce L. Bramfitt, Fred B. Fletcher, John A. Davis, Jr.
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Publication number: 20120298263Abstract: A method of making a hypereutectoid, head-hardened steel rail is provided that includes a step of head hardening a steel rail having a composition containing 0.86-1.00 wt % carbon, 0.40-0.75 wt % manganese, 0.40-1.00 wt % silicon, 0.05-0.15 wt % vanadium, 0.015-0.030 wt % titanium, and sufficient nitrogen to react with the titanium to form titanium nitride. Head hardening is conducted at a cooling rate that, if plotted on a graph with xy-coordinates with the x-axis representing cooling time in seconds, and the y-axis representing temperature in Celsius of the surface of the head of the steel rail, is maintained in a region between an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 775° C.), (20 s, 670° C.), and (110 s, 550° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 750° C.), (20 s, 610° C.), and (110 s, 500° C.).Type: ApplicationFiled: August 13, 2012Publication date: November 29, 2012Inventors: Bruce L. BRAMFITT, Fred B. Fletcher, John A. Davis, JR.
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Patent number: 8241442Abstract: A method of making a hypereutectoid, head-hardened steel rail is provided that includes a step of head hardening a steel rail having a composition containing 0.86-1.00 wt % carbon, 0.40-0.75 wt % manganese, 0.40-1.00 wt % silicon, 0.05-0.15 wt % vanadium, 0.015-0.030 wt % titanium, and sufficient nitrogen to react with the titanium to form titanium nitride. Head hardening is conducted at a cooling rate that, if plotted on a graph with xy-coordinates with the x-axis representing cooling time in seconds, and the y-axis representing temperature in Celsius of the surface of the head of the steel rail, is maintained in a region between an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 775° C.), (20 s, 670° C.), and (110 s, 550° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 750° C.), (20 s, 610° C.), and (110 s, 500° C.).Type: GrantFiled: June 4, 2010Date of Patent: August 14, 2012Assignee: Arcelormittal Investigacion y Desarrollo, S.L.Inventors: Bruce L. Bramfitt, Fred B. Fletcher, John A. Davis, Jr.
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Publication number: 20110139320Abstract: A method of making a hypereutectoid, head-hardened steel rail is provided that includes a step of head hardening a steel rail having a composition containing 0.86-1.00 wt % carbon, 0.40-0.75 wt % manganese, 0.40-1.00 wt % silicon, 0.05-0.15 wt % vanadium, 0.015-0.030 wt % titanium, and sufficient nitrogen to react with the titanium to form titanium nitride. Head hardening is conducted at a cooling rate that, if plotted on a graph with xy-coordinates with the x-axis representing cooling time in seconds, and the y-axis representing temperature in Celsius of the surface of the head of the steel rail, is maintained in a region between an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 775° C.), (20 s, 670° C.), and (110 s, 550° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 750° C.), (20 s, 610° C.), and (110 s, 500° C.).Type: ApplicationFiled: June 4, 2010Publication date: June 16, 2011Inventors: Bruce L. BRAMFITT, Fred B. Fletcher, John A. Davis, JR.
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Patent number: 5387392Abstract: A high strength, high toughness steel comprising from about 0.32 to about 0.36 percent by weight carbon, from about 0.40 to about 0.60 percent by weight manganese, from about 0.15 to about 0.35 percent by weight silicon, from about 0.80 to about 1.10 percent by weight chromium, from about 0.55 to about 0.70 percent by weight molybdenum, from about 0.01 to about 0.05 percent by weight aluminum, from about 0.002 to about 0.004 calcium, no more than about 0.015 percent by weight phosphorus, no more than about 0.008 percent by weight sulfur, with the balance being iron.Type: GrantFiled: August 25, 1993Date of Patent: February 7, 1995Assignee: Bethlehem Steel CorporationInventors: Bruce L. Bramfitt, Leonard C. Luscomb
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Patent number: 5017335Abstract: A microalloyed, fully killed steel has a composition, in weight percent, of from about 0.20 to about 0.45 percent carbon, from about 0.90 to about 1.70 percent manganese, from about 0.10 to about 0.35 percent silicon, from about 0.01 to about 0.04 percent aluminum, from about 0.05 to about 0.20 percent vanadium, from about 0.008 to about 0.024 percent nitrogen, balance iron. The steel is particularly useful when hot rolled to a railway joint bar section, and air cooled. The resulting joint bar meets AREA specifications in the as-rolled condition, without the need for a reheat and oil quench heat treatment after rolling.Type: GrantFiled: June 29, 1989Date of Patent: May 21, 1991Assignee: Bethlehem Steel Co.Inventors: Bruce L. Bramfitt, Steven S. Hansen
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Patent number: 4415376Abstract: This invention is directed to a hot-rolled steel sheet having an essentially refined ferritic grain size, a balanced chemical composition comprising, by weight, 0.06 to 0.09% carbon, 1.0 to 1.6% manganese, 0.5% maximum silicon, 0.03 to 0.05% columbium, 0.06 to 0.12% vanadium, 0.010 to 0.025% nitrogen, 0.004% maximum sulfur, 0.02% maximum phosphorus, 0.02 to 0.08% aluminum, balance essentially iron, and characterized by 80 ksi minimum yield strength, improved transverse bendability, and improved sheared edge stretchability.Type: GrantFiled: February 16, 1982Date of Patent: November 15, 1983Assignee: Bethlehem Steel CorporationInventors: Bruce L. Bramfitt, Steven S. Hansen, Donald L. Harper, Roger R. Pradhan
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Patent number: 4398970Abstract: This invention is directed to a method and to the resulting product, wherein said product is a low-carbon dual phase steel having a combination of high strength, good ductility and a YS/TS ratio .ltoreq.0.6. The method includes the steps of (1) preparing an Al-killed steel consisting essentially of 0.05 to 0.15 wt. % C, up to 2.0 wt. % Mn, up to 1.0 wt. % Si, 0.03 to 0.15 wt. % V and a sufficient amount of titanium to "getter" the excess sulfur and nitrogen, with the balance essentially being iron, where the titanium addition should be at least equal to the atomic percent of the sulfur plus nitrogen, but no more than about 1.6 times, (2) intercritically annealing such steel within the .alpha.+.gamma. temperature range, and (3) cooling to room temperature.Type: GrantFiled: October 5, 1981Date of Patent: August 16, 1983Assignee: Bethlehem Steel CorporationInventors: Arnold R. Marder, Bruce L. Bramfitt