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1. 发明申请

WO1997036016A1 LOW-ALLOY HEAT-TREATED PEARLITIC STEEL RAILS WITH EXCELLENT WEAR RESISTANCE AND WELDING CHARACTERISTICS AND PROCESS FOR PRODUCTION THEREOF 审中-公开
标题翻译：具有优异耐磨性和焊接特性的低合金热处理精密钢轨及其生产工艺
公开(公告)号：WO1997036016A1
公开(公告)日：1997-10-02
申请号：PCT/JP1996001265
申请日：1996-05-14
申请人： NIPPON STEEL CORPORATION , UEDA, Masaharu , KAGEYAMA, Hideaki , UCHINO, Kouichi , BABAZONO, Koji , KUTARAGI, Ken
发明人： NIPPON STEEL CORPORATION
IPC分类号： C22C38/18
CPC分类号： C22C38/32 , C21D9/04 , C22C38/24 , C22C38/26
摘要： Pearlitic steel rails remarkably improved in wear resistance and welding characteristics (weldability and welded joint characteristics) required of heavy-road railway rails. The rail steel contains on the weight basis over 0.85 to 1.20 % C, 0.10 to 1.00 % Si, 0.20 to 1.50 % Mn and over 0.50 to 1.00 % Cr, or over 0.85 to 1.20 % C, 0.40 to 1.00 % Si, 0.20 to less than 0.40 % Mn and 0.35 to 0.50 % Cr, the sum of Si/4, Mn/2 and Cr being 0.80 to 1.80 %, further contains at least one of Mo, V, Nb and B, and the balance consisting of Fe and inevitable impurities. In order to prevent the indention of the head of a welded joint due to local wear without detriment to the welding characteristics, the rail is characterized in that the corner of the rail head and the surface of the welded joint have a pearlitic structure to the depth of at least 20 mm, that the hardness of the pearlitic structure is at least Hv320, and that difference in hardness between the base metal of the rail and the welded joint is at most Hv30.
摘要翻译：珍珠岩钢轨显着提高了重型铁路轨道所需的耐磨性和焊接特性（焊接性和焊接接头特性）。轨道钢的重量基于0.85〜1.20％的C，0.10〜1.00％的Si，0.20〜1.50％的Mn和0.50〜1.00％的Cr，或0.85〜1.20％的C，0.40〜1.00％的Si，0.20〜小于0.40％的Mn和0.35〜0.50％的Cr，Si / 4，Mn / 2和Cr的总和为0.80〜1.80％，还含有Mo，V，Nb和B中的至少一种，余量由Fe 和不可避免的杂质。为了防止由于局部磨损导致的焊接头部的头部的损伤而不损害焊接特性，该轨道的特征在于，轨头的角部和焊接接头的表面具有到深度的珠光体结构至少为20mm，珠光体组织的硬度至少为Hv320，轨道的基体金属和焊接接头之间的硬度差异至多为Hv30。

2. 发明申请

WO1996028581A1 RAIL HAVING HIGH WEAR RESISTANCE AND HIGH INTERNAL DAMAGE RESISTANCE, AND ITS PRODUCTION METHOD 审中-公开
标题翻译：具有高耐磨性和高内部耐损性的轨道及其生产方法
公开(公告)号：WO1996028581A1
公开(公告)日：1996-09-19
申请号：PCT/JP1996000605
申请日：1996-03-11
申请人： NIPPON STEEL CORPORATION , UEDA, Masaharu , UCHINO, Kouichi
发明人： NIPPON STEEL CORPORATION
IPC分类号： C22C38/00
CPC分类号： C22C38/002 , C21D9/04 , C21D2221/02 , C22C38/12 , C22C38/32
摘要： A rail haiving a high wear resistance and a high internal damage resistance required for heavy load railways. The head of steel contains 0.85 (more than 0.85) to 1.20 wt.% of C, 0.10 to 1.00 wt.% of Si, 0.40 to 1.50 wt.% of Mn, 0.0005 to 0.0040 wt.% of B, and if necessary, at least one of 0.05 to 1.00 wt.% of Cr, 0.01 to 0.50 wt.% of Mo, 0.02 to 0.30 wt.% of V, 0.002 to 0.05 wt.% of Nb and 0.10 to 2.00 wt.% of Co. The head is acceleratedly cooled at a cooling rate of 5-15 DEG C/sec from the austenite temperature zone to 650-500 DEG C. The range of the rail from the surface of the head to the depth of a least 20 mm has a pearlite structure and has a hardness of at least Hv 370. The difference of the hardness within this range is not greater than Hv 30.
摘要翻译：铁路承受重负荷铁路所需的高耐磨性和高内部损坏阻力。钢头含有0.85（0.85以上）至1.20重量％的C，0.10〜1.00重量％的Si，0.40〜1.50重量％的Mn，0.0005〜0.0040重量％的B，如果需要， 0.05〜1.00重量％的Cr，0.01〜0.50重量％的Mo，0.02〜0.30重量％的V，0.002〜0.05重量％的Nb和0.10〜2.00重量％的Co中的至少1种。头部以5-15℃/秒的冷却速度从奥氏体温度区域加速冷却至650-500℃。从头部表面到深度至少20mm的轨道的范围具有珠光体结构，并且具有至少Hv 370的硬度。该范围内的硬度差不大于Hv 30。

3. 发明申请

WO1996015282A1 PERLITE RAIL OF HIGH ABRASION RESISTANCE AND METHOD OF MANUFACTURING THE SAME 审中-公开
标题翻译：高耐磨性的铁素体及其制造方法
公开(公告)号：WO1996015282A1
公开(公告)日：1996-05-23
申请号：PCT/JP1995002312
申请日：1995-11-13
申请人： NIPPON STEEL CORPORATION , UEDA, Masaharu , KAGEYAMA, Hideaki , UCHINO, Kouichi , BABAZONO, Koji , KUTARAGI, Ken
发明人： NIPPON STEEL CORPORATION
IPC分类号： C22C38/32
CPC分类号： C21D9/04 , C21D1/84 , C21D2211/009
摘要： The present invention aims at improving the abrasion resistance and damage resistance of a rail used in a steeply curved section of a heavy load railway. A perlite rail of high abrasion resistance and damage resistance characterized in that a head portion of a steel rail containing from more than 0.85 % to 1.20 % of C, 0.10-1.00 % of Si and 0.40-1.50 % of Mn, and, in addition to these, one or not less than two kinds of elements out of Cr, Mo, V, Nb, Co and B as necessary, or a head portion of a steel rail heated to a high temperature so as to be heat treated is acceleration cooled at 1 DEG -10 DEG C/sec between an austenite region temperature and a cooling stopping temperature of 700 DEG -500 DEG C to set the hardness of the head portion to not lower than Hv 320 and heighten that of a corner part of the head portion; and a manufacturing method therefor.
摘要翻译：本发明旨在提高在重载铁路的陡峭弯曲部分中使用的轨道的耐磨性和耐损伤性。具有高耐磨性和耐损伤性的珍珠岩轨道，其特征在于钢轨头部含有C：0.85〜1.20％，Si：0.10〜1.00％，Mn为0.40〜1.50％，另外还有对于这些，根据需要，可以从Cr，Mo，V，Nb，Co，B中选出1种以上的元素，或加热到高温的钢轨头部进行加热冷却在奥氏体区域温度和700℃-500℃的冷却停止温度之间为1〜10℃/秒，将头部的硬度设定为不低于Hv 320，并提高头部的角部的硬度一部分; 及其制造方法。

4. 发明申请

WO1995017532A1 RAIL OF HIGH ABRASION RESISTANCE AND HIGH TENACITY HAVING PEARLITE METALLOGRAPHIC STRUCTURE AND METHOD OF MANUFACTURING THE SAME 审中-公开
标题翻译：具有PEARLITE METALLOGRAPHIC结构的高耐磨性和高刚度的铁路及其制造方法
公开(公告)号：WO1995017532A1
公开(公告)日：1995-06-29
申请号：PCT/JP1994002137
申请日：1994-12-19
申请人： NIPPON STEEL CORPORATION , UCHINO, Kouichi , KUROKI, Toshiya , UEDA, Masaharu
发明人： NIPPON STEEL CORPORATION
IPC分类号： C22C38/00
CPC分类号： C21D8/00 , C21D9/04 , C21D2211/009 , C22C38/00 , Y10S148/902
摘要： This invention relates to a high-tenacity rail having a strength, an abrasion resistance, and a high carbon pearlite structure excellent in ductility and tenacity; and a method of manufacturing the same. A high-tenacity rail having elongation of not less than 12 % and a U-notch Charpy impact value of not less than 25 J/cm obtained by forming fine pearlite blocks by a special rolling operation in steel of a high abrasion resistance containing 0.60-1.20 wt.% of C, 0.10-1.20 wt.% of Si and 0.40-1.50 wt.% of Mn, and one or not less than two kinds of elements out of Cr, Mo, V, Nb and Co as necessary; and a method of manufacturing the same. This invention enables the ductility and tenacity of a high carbon steel rail of a high abrasion resistance to be improved, and a rail of a high safety to be provided for railways in a cold district.
摘要翻译：本发明涉及具有优异的延展性和韧性的强度，耐磨性和高碳珠光体结构的高强度钢轨。及其制造方法。通过在耐磨性高的钢中通过特殊的轧制操作形成细珠光体块而得到的，具有不小于12％的伸长率的高韧性钢轨以及不小于25J / cm 2的U形缺口夏比冲击值含有0.60-1.20重量％的C，0.10-1.20重量％的Si和0.40-1.50重量％的Mn，以及Cr，Mo，V，Nb和Co中的一种或不少于两种元素作为必要; 及其制造方法。本发明能够提高高耐磨性的高碳钢轨道的延展性和韧性，并且可以在寒冷地区为铁路提供高安全性的轨道。

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