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1. 发明申请

US20110139320A1 METHOD OF MAKING A HYPEREUTECTOID, HEAD-HARDENED STEEL RAIL 有权
标题翻译：制备高强度钢，硬化钢铁的方法
公开(公告)号：US20110139320A1
公开(公告)日：2011-06-16
申请号：US12794191
申请日：2010-06-04
申请人： Bruce L. BRAMFITT , Fred B. Fletcher , John A. Davis, JR.
发明人： Bruce L. BRAMFITT , Fred B. Fletcher , John A. Davis, JR.
IPC分类号： C21D9/04
CPC分类号： C21D9/04 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/14
摘要： 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.).
摘要翻译：提供了一种制造过共析的头硬化钢轨的方法，其包括头硬化钢轨的步骤，该钢轨具有含有0.86-1.00重量％碳，0.40-0.75重量％锰，0.40-1.00重量％硅，0.05 -0.15重量％的钒，0.015-0.030重量％的钛和足够的氮与钛反应形成氮化钛。头部硬化以冷却速度进行，如果绘制在xy坐标，x轴表示冷却时间（秒），y轴表示钢轨头部表面温度摄氏度的曲线图上，保持在由连接xy坐标（0s，775℃），（20s，670℃）和（110s，550℃）的上部线限定的上部冷却速率边界图之间的区域中。）和由连接xy坐标（0s，750℃），（20s，610℃）和（110s，500℃）的下一行限定的较低冷却速率边界图。

2. 发明授权

US08721807B2 Hypereutectoid, head-hardened steel rail 有权
标题翻译：过共晶，头硬化钢轨
公开(公告)号：US08721807B2
公开(公告)日：2014-05-13
申请号：US13584145
申请日：2012-08-13
申请人： Bruce L. Bramfitt , Fred B. Fletcher , John A. Davis, Jr.
发明人： Bruce L. Bramfitt , Fred B. Fletcher , John A. Davis, Jr.
IPC分类号： C22C38/02 , C22C38/04 , C22C38/14 , C22C38/12
CPC分类号： C21D9/04 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/14
摘要： 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.).
摘要翻译：提供了一种制造过共析的头硬化钢轨的方法，其包括头硬化钢轨的步骤，该钢轨具有含有0.86-1.00重量％碳，0.40-0.75重量％锰，0.40-1.00重量％硅，0.05 -0.15重量％的钒，0.015-0.030重量％的钛和足够的氮与钛反应形成氮化钛。头部硬化以冷却速度进行，如果绘制在xy坐标，x轴表示冷却时间（以秒为单位），y轴表示钢轨头部表面温度（摄氏度）的曲线图上，保持在由连接xy坐标（0s，775℃），（20s，670℃）和（110s，550℃）的上部线限定的上部冷却速率边界图之间的区域中。）和由连接xy坐标（0s，750℃），（20s，610℃）和（110s，500℃）的下一行限定的较低冷却速率边界图。

3. 发明授权

US08241442B2 Method of making a hypereutectoid, head-hardened steel rail 有权
标题翻译：制造过共析，硬化钢轨的方法
公开(公告)号：US08241442B2
公开(公告)日：2012-08-14
申请号：US12794191
申请日：2010-06-04
申请人： Bruce L. Bramfitt , Fred B. Fletcher , John A. Davis, Jr.
发明人： Bruce L. Bramfitt , Fred B. Fletcher , John A. Davis, Jr.
IPC分类号： C21D9/04
CPC分类号： C21D9/04 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/14
摘要： 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.).
摘要翻译：提供了一种制造过共析的头硬化钢轨的方法，其包括头硬化钢轨的步骤，该钢轨具有含有0.86-1.00重量％碳，0.40-0.75重量％锰，0.40-1.00重量％硅，0.05 -0.15重量％的钒，0.015-0.030重量％的钛和足够的氮与钛反应形成氮化钛。头部硬化以冷却速度进行，如果绘制在xy坐标，x轴表示冷却时间（以秒为单位），y轴表示钢轨头部表面温度（摄氏度）的曲线图上，保持在由连接xy坐标（0s，775℃），（20s，670℃）和（110s，550℃）的上部线限定的上部冷却速率边界图之间的区域中。）和由连接xy坐标（0s，750℃），（20s，610℃）和（110s，500℃）的下一行限定的较低冷却速率边界图。

4. 发明申请

US20120298263A1 METHOD OF MAKING HYPEREUTECTOID, HEAD-HARDENED STEEL RAIL 有权
标题翻译：制备高强度钢，硬化钢铁的方法
公开(公告)号：US20120298263A1
公开(公告)日：2012-11-29
申请号：US13584145
申请日：2012-08-13
申请人： Bruce L. BRAMFITT , Fred B. Fletcher , John A. Davis, JR.
发明人： Bruce L. BRAMFITT , Fred B. Fletcher , John A. Davis, JR.
IPC分类号： C22C38/02 , C22C38/04
CPC分类号： C21D9/04 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/14
摘要： 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.).
摘要翻译：提供了一种制造过共析的头硬化钢轨的方法，其包括头硬化钢轨的步骤，该钢轨具有含有0.86-1.00重量％碳，0.40-0.75重量％锰，0.40-1.00重量％硅，0.05 -0.15重量％的钒，0.015-0.030重量％的钛和足够的氮与钛反应形成氮化钛。头部硬化以冷却速度进行，如果绘制在xy坐标，x轴表示冷却时间（以秒为单位），y轴表示钢轨头部表面温度（摄氏度）的曲线图上，保持在由连接xy坐标（0s，775℃），（20s，670℃）和（110s，550℃）的上部线限定的上部冷却速率边界图之间的区域中。）和由连接xy坐标（0s，750℃），（20s，610℃）和（110s，500℃）的下一行限定的较低冷却速率边界图。

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