公开(公告)号：US06361625B1

公开(公告)日：2002-03-26

申请号：US09231440

申请日：1999-01-14

申请人： Masahisa Fujikake ,  Jun Furukawa ,  Kiyotaka Morioka ,  Kozo Fukuda ,  Hideyuki Yamanaka ,  Kazutaka Kobayashi ,  Shinichi Nagahashi

发明人： Masahisa Fujikake ,  Jun Furukawa ,  Kiyotaka Morioka ,  Kozo Fukuda ,  Hideyuki Yamanaka ,  Kazutaka Kobayashi ,  Shinichi Nagahashi

IPC分类号： C21D118

摘要： A high-strength, high damage-resistant rail made of 0.6 to 0.85 wt % C, 0.1 to 1.0 wt % Si, 0.5 to 1.5 wt % Mn, 0.035 wt % or less P, 0.040 wt % or less S, and 0.05 wt % or less Al, with the balance being Fe and inevitable impurities, and having corner and head side portions having a Brinell hardness of 341 to 405, and a head top portion in which a Brinell hardness of a site 20-mm distant from the central portion of the head top portion in a width direction is 341 to 405, and a hardness of the central portion of the head top portion is at least 10 lower in Brinell hardness than that of the site 20-mm distant from the central portion.

公开(公告)号：US4933024A

公开(公告)日：1990-06-12

申请号：US252878

申请日：1988-10-03

申请人： Kozo Fukuda ,  Tsunemi Wada ,  Ichiro Nakauchi ,  Shinichi Nagahashi ,  Yoshio Saito ,  Kiyotaka Morioka ,  Yuzuru Kataoka ,  Yuzu Kato ,  Toyokazu Teramoto ,  Akio Fujibayashi

发明人： Kozo Fukuda ,  Tsunemi Wada ,  Ichiro Nakauchi ,  Shinichi Nagahashi ,  Yoshio Saito ,  Kiyotaka Morioka ,  Yuzuru Kataoka ,  Yuzu Kato ,  Toyokazu Teramoto ,  Akio Fujibayashi

IPC分类号： C21D9/04 ,  C22C38/00 ,  C22C38/06 ,  C22C38/50

CPC分类号： C21D9/04

摘要： A method for manufacturing a high strength rail with good toughness, comprises cooling a rail to Ar.sub.3 transformation point or less after hot rolling; heating said cooled rail at a temperature of an austenite temperature zone ranging from Ac.sub.3 transformation point to 950.degree. C.; and cooling the heated rail. The chemical composition of the rail consists of 0.50 to 0.85 wt. % C, 0.50 to 1.50 wt. % Mn, 0.035 wt. % S or less, 0.10 to 1.00 wt. % Si, 0.035 wt. % P or less, 0.050 wt. % Al or less and the balance of Fe and inevitable impurities.

摘要翻译： 一种制造具有良好韧性的高强度钢轨的方法，包括在热轧后将钢轨冷却至Ar3相变点以下。 在从Ac3相变点到950℃的奥氏体温度区的温度下加热所述冷却的轨道。 并冷却加热的轨道。 轨道的化学成分为0.50〜0.85wt。 ％C，0.50〜1.50wt。 ％Mn，0.035重量％ ％S以下，0.10〜1.00重量％ ％Si，0.035wt。 ％P以下，0.050重量％ ％Al以下，余量为Fe和不可避免的杂质。

公开(公告)号：US4886558A

公开(公告)日：1989-12-12

申请号：US196317

申请日：1988-05-20

申请人： Toyokazu Teramoto ,  Akio Fujibayashi ,  Kozo Fukuda ,  Mashiro Ueda ,  Shinichi Nagahashi ,  Yazuru Kataoka ,  Hiroaki Sato ,  Tsunemi Wada ,  Takao Gino ,  Yoshio Saito ,  Kiyotaka Morioka

发明人： Toyokazu Teramoto ,  Akio Fujibayashi ,  Kozo Fukuda ,  Mashiro Ueda ,  Shinichi Nagahashi ,  Yazuru Kataoka ,  Hiroaki Sato ,  Tsunemi Wada ,  Takao Gino ,  Yoshio Saito ,  Kiyotaka Morioka

IPC分类号： C21D1/19 ,  C21D9/04

CPC分类号： C21D9/04 ,  C21D1/19

摘要： A method for heat-treating a steel rail head, which comprises: heating a steel rail head to the austenization temperature; then, cooling the rail head by means of a hot water jet until a surface temperature of the rail head decreases to a temperature not below 420.degree. C.; and then cooling the rail head by means of an air jet at least to the pearlite transformation temperature, thereby transforming the structure of a surface portion of the rail head into a uniform and fine pearlite structure. The above-described method includes a method in which the rail head is previously cooled by means of a water spray until the surface temperature of the rail head decreases to a temperature not below 530.degree. C. prior to the cooling of the rail head by means of the above-mentioned hot water jet.

公开(公告)号：US4767475A

公开(公告)日：1988-08-30

申请号：US919059

申请日：1986-10-15

申请人： Kozo Fukuda ,  Tsunemi Wada ,  Shinichi Nagahashi ,  Yoshio Saito ,  Masahiro Ueda ,  Minoru Tanaka

发明人： Kozo Fukuda ,  Tsunemi Wada ,  Shinichi Nagahashi ,  Yoshio Saito ,  Masahiro Ueda ,  Minoru Tanaka

IPC分类号： E01B5/02 ,  C21D9/04 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/46 ,  C22C38/02

CPC分类号： C22C38/00 ,  C21D9/04 ,  Y10S148/902

摘要： A wear resistance rail which comprises 0.50 to 0.85 wt. % of C, 0.10 to 1.0 wt. % of Si, 0.50 to 1.50 wt. % of Mn, less than 0.035 wt. % of P, less than 0.035 wt. % of S, less than 0.050 wt. % of Al, and the balance of iron and impurities. The web has a high toughness tempered bainite structure, tempered martensite structure or a tempered mixed structure of bainite and martensite and the head rail has high wear resistance which prevents unstable destructive cracks from propagating. The rail can further contain one or more of 0.05 to 1.50 wt. % of Cr, 0.05 to 0.20 wt. % of Mo, 0.03 to 0.10 wt. % of V, 0.10 to 1.00 wt. % of Ni, and 0.005 to 0.050 wt. % of Nb.

摘要翻译： 耐磨轨，其含有0.50〜0.85重量％ C％，0.10〜1.0重量％ Si％，0.50〜1.50wt。 Mn％，小于0.035wt。 P％，小于0.035wt。 S％，小于0.050wt。 ％的Al，余量的铁和杂质。 网具有高韧性回火贝氏体组织，回火马氏体结构或贝氏体和马氏体的回火混合结构，并且头轨具有高耐磨性，防止不稳定的破坏性裂纹传播。 轨道可以进一步包含0.05至1.50重量％的一种或多种。 Cr％，0.05〜0.20wt。 ％的Mo，0.03〜0.10wt。 V％，0.10〜1.00重量％ 的Ni，0.005〜0.050重量％ Nb％。