公开(公告)号：US06357297B1

公开(公告)日：2002-03-19

申请号：US09587415

申请日：2000-06-01

申请人： Taizo Makino ,  Takashi Fujimura

发明人： Taizo Makino ,  Takashi Fujimura

IPC分类号： G01N2904

CPC分类号： G01N29/4427 ,  G01N29/227 ,  G01N29/30 ,  G01N29/4472 ,  G01N2291/2696

摘要： A method for easily and effectively preventing shattered-rim fracture in a railway wheel. Generally, the method comprises the steps of providing a railway wheel, measuring the maximum defect size within the rim of the railway wheel, and determining whether the maximum defect size is less than a predetermined maximum permissible defect size, the maximum permissible defect size being determined based on an analysis of the likelihood of Mode II crack propagation from the defect when the railway wheel has been subjected to the load. The disclosed invention also encompasses a method for grading railway wheels for maximum load suitability.

摘要翻译： 一种易于有效防止铁路车轮破碎边缘断裂的方法。 通常，该方法包括以下步骤：提供铁路车轮，测量铁路车轮边缘内的最大缺陷尺寸，以及确定最大缺陷尺寸是否小于预定的最大允许缺陷尺寸，确定最大允许缺陷尺寸 基于对铁路车轮已经承受负载时的缺陷的模式II裂纹扩展的可能性的分析。 所公开的发明还包括用于对铁路车轮进行分级以最大负载适应性的方法。

公开(公告)号：US06663727B2

公开(公告)日：2003-12-16

申请号：US10080312

申请日：2002-02-21

申请人： Takashi Fujimura ,  Taizo Makino

发明人： Takashi Fujimura ,  Taizo Makino

IPC分类号： C22C38708

CPC分类号： C22C38/001 ,  C21D9/34 ,  C22C38/40

摘要： Disclosed is a steel alloy that includes as alloying ingredients carbon, silicon, manganese, aluminum, and oxygen. In accordance with this embodiment of the disclosed invention, carbon is present in an amount ranging from 0.40 to 0.77 wt. %; silicon is present in an amount ranging from 0.40 to 1.20 wt. %; manganese is present in an amount ranging from 0.40 to 1.20 wt. %, aluminum is present in an amount ranging from 0.003 to 0.060 wt. %; and oxygen is present in an amount ranging up to 0.0030 wt. %. Also disclosed is a railway wheel that comprises a hub, a rim, and a connecting plate. In accordance with this embodiment of the disclosed invention, at least the rim, and preferably the entire railway wheel, is composed of the disclosed steel composition.

公开(公告)号：US06372057B1

公开(公告)日：2002-04-16

申请号：US09587422

申请日：2000-06-01

申请人： Takashi Fujimura ,  Taizo Makino

发明人： Takashi Fujimura ,  Taizo Makino

IPC分类号： C22C3840

CPC分类号： C22C38/001 ,  C21D9/34 ,  C22C38/40

摘要： Disclosed is a steel alloy that includes as alloying ingredients carbon, silicon, manganese, aluminum, and oxygen. In accordance with this embodiment of the disclosed invention, carbon is present in an amount ranging from 0.40 to 0.77 wt. %; silicon is present in an amount ranging from 0.40 to 1.20 wt. %; manganese is present in an amount ranging from 0.40 to 1.20 wt. %, aluminum is present in an amount ranging from 0.003 to 0.060 wt. %; and oxygen is present in an amount ranging up to 0.0030 wt. %. Also disclosed is a railway wheel that comprises a hub, a rim, and a connecting plate. In accordance with this embodiment of the disclosed invention, at least the rim, and preferably the entire railway wheel, is composed of the disclosed steel composition.

摘要翻译： 公开了一种钢合金，其包括作为合金成分的碳，硅，锰，铝和氧。 根据所公开的本发明的该实施方案，碳的存在量为0.40至0.77wt。 ％; 硅的存在量为0.40至1.20重量％。 ％; 锰的存在量为0.40至1.20重量％。 ％，铝的含量为0.003-0.060wt。 ％; 氧气的存在量可达0.0030wt。 ％。 还公开了一种包括轮毂，轮辋和连接板的铁路车轮。 根据所公开的本发明的这个实施例，至少轮辋，最好是整个铁路车轮由所公开的钢组合物构成。

公开(公告)号：US5899516A

公开(公告)日：1999-05-04

申请号：US787218

申请日：1997-01-22

申请人： Takashi Fujimura ,  Manao Anjiki ,  Taizo Makino ,  Yoshihiro Daitoh

发明人： Takashi Fujimura ,  Manao Anjiki ,  Taizo Makino ,  Yoshihiro Daitoh

IPC分类号： B60B17/00 ,  C21D1/84 ,  C21D9/34 ,  C22C38/00 ,  C22C38/18 ,  B60B37/00

CPC分类号： B60B17/00 ,  C21D1/84 ,  C21D9/34

摘要： A wheel has both wear resistance and heat-crack resistance sufficient for use in a high-speed railway vehicle. The chemical composition of a base steel comprises 0.4 to 0.75 % C, 0.4 to 0.95% Si, 0.6 to 1.2% Mn and less than 0.2% Cr. The wheel has a pearlitic microstructure in a region of at least 50 mm in depth from the tread surface of the wheel. When the tread of the wheel is quenched, a particular cooling process is applied in order to obtain the pearlitic structure.

摘要翻译： 轮具有足以用于高速铁路车辆的耐磨性和耐热裂纹性。 基础钢的化学成分包含0.4〜0.75％的C，0.4〜0.95％的Si，0.6〜1.2％的Mn和小于0.2％的Cr。 该车轮在与车轮的胎面表面相距至少50mm的区域中具有珠光体组织。 当车轮的胎面被淬火时，应用特定的冷却过程以获得珠光体结构。