公开(公告)号：US07217329B2

公开(公告)日：2007-05-15

申请号：US10228802

申请日：2002-08-26

申请人： J. Vincent Cordova

发明人： J. Vincent Cordova

IPC分类号： C21D9/04 ,  C22C38/50

CPC分类号： E01B5/02 ,  C21D8/005 ,  C21D9/04 ,  C21D2211/009 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/50

摘要： An improved steel railroad rail, and methods for producing same, having a carbon content in a range from 0.7 to 0.95 wt % and titanium in the range of 0.005 to 0.105 wt % is provided that has increased wear resistance and increased fracture toughness over conventional steel rail. The rail is characterized as having a pearlitic phase of an eutectoid nature. The average ultimate tensile strength is in a range from 178,000 to 207,000 psi, with a minimum of 174,000 psi. The average yield strength is in a range from 122,000 to 141,000 psi, with the minimum of 120,000 psi. The average percent elongation is in a range from 10.3 to 12.5, with a minimum of 10.00. The Brinell hardness on the surface at any position of the head top and upper gage corners of the rail is in a range from 370 to 420 BHN. The hardness 19 mm below the top surface is in a range from 360 to 405 BHN and 19 mm below the surface at the upper gage corners is in a range from 360 to 410 BHN. The characteristics of the steel rail produced in accordance with the present invention is a substantial improvement as compared with rail used today. The production of a fully pearlitic steel rail having a carbon content from 0.7 to 0.95 wt % and titanium in the range of 0.005 to 0.105 wt % Ti is remarkable and unexpected. A steel rail of this type having a hardness in a range from 370 to 420 BHN and a combination of yield strength, ultimate tensile strength, elongation and surface and in-depth Brinell hardness goes beyond all expectations and results in a superior and commercially important steel rail.

摘要翻译： 提供一种改进的钢铁轨道及其制造方法，其碳含量在0.7至0.95重量％的范围内，钛的范围为0.005至0.105重量％，其具有比常规钢具有更高的耐磨性和增加的断裂韧性 轨。 轨道的特点是具有共析性质的珠光体相。 平均极限拉伸强度在178,000至207,000psi的范围内，最小为174,000psi。 平均屈服强度在122,000至141,000psi的范围内，最小值为120,000psi。 平均伸长率范围为10.3至12.5，最小为10.00。 轨道头顶和上限角的任何位置的表面上的布氏硬度在370至420 BHN的范围内。 上表面下方19mm的硬度在360〜405HBN的范围内，上限角处的表面下方的19mm在360〜410HBN的范围内。 与现在使用的轨道相比，根据本发明生产的钢轨的特征是显着的改进。 碳含量为0.7〜0.95重量％，钛为0.005〜0.105重量％Ti的完全珠光体钢轨的生产是非常出乎意料的。 这种类型的钢轨具有在370至420HBN范围内的硬度以及屈服强度，极限拉伸强度，伸长率和表面以及深度布氏硬度的组合超出了所有期望值，并且导致了优异和商业上重要的钢 轨。

公开(公告)号：US07288159B2

公开(公告)日：2007-10-30

申请号：US10120471

申请日：2002-04-10

申请人： J. Vincent Cordova

发明人： J. Vincent Cordova

IPC分类号： C21D9/06

CPC分类号： C22C38/42 ,  C21D7/13 ,  C21D8/00 ,  C21D9/04 ,  C21D2211/009 ,  C22C38/04

摘要： An improved steel railroad rail, and methods for producing same, having a high-carbon content in a range from more than 0.9 to 1.1 wt % is provided that has increased wear resistance and increased fracture toughness over conventional steel rail. The high-carbon rail is characterized as having a pearlitic phase of an eutectoid nature. The average ultimate tensile strength is in a range from 204,860 to 222,120 psi, with a minimum of 174,000 psi. The average yield strength is in a range from 132,320 to 148,450 psi, with the minimum of 120,000 psi. The average percent elongation is in a range from 10.50 to 11.14, with a minimum of 10.00. The Brinell hardness on the surface at any position of the head top and upper gage corners of the rail is in a range from 390 to 440 BHN. The hardness 19 mm below the top surface is in a range from 360 to 435 BHN and 19 mm below the surface at the upper gage corners is in a range from 360 to 410 BHN. The characteristics of the steel rail produced in accordance with the present invention is a substantial improvement as compared with rail used today. The production of a fully pearlitic steel rail having a carbon content from more than 0.9 to 1.1 wt % is remarkable and unexpected. A steel rail of this type having a hardness in a range from 400 to 440 BHN and a combination of yield strength, ultimate tensile strength, elongation and surface and in-depth Brinell hardness goes beyond all expectations and results in a superior and commercially important steal rail.

摘要翻译： 提供了一种改进的钢铁轨道及其制造方法，其具有大于0.9至1.1重量％的高碳含量，其具有比常规钢轨更高的耐磨性和增加的断裂韧性。 高铁轨道的特点是具有共晶性质的珠光体相。 平均极限拉伸强度在204,860至222,120psi的范围内，最小值为174,000psi。 平均屈服强度在132,320至148,450psi的范围内，最小值为120,000psi。 平均百分比伸长率范围为10.50至11.14，最小为10.00。 轨道头顶和上限角的任何位置的表面上的布氏硬度在390至440 BHN的范围内。 上表面下方19mm的硬度在360〜435HBN的范围内，上限角处的表面下方的19mm的硬度在360〜410HBN的范围内。 与现在使用的轨道相比，根据本发明生产的钢轨的特征是显着的改进。 碳含量大于0.9〜1.1重量％的完全珠光体钢轨的生产是出人意料的。 这种类型的钢轨具有400至440 BHN的硬度以及屈服强度，极限拉伸强度，伸长率和表面以及深度布氏硬度的组合超出了所有预期，并导致了卓越和商业上重要的偷 轨。