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1. 发明授权

US6090226A Steel plate excellent in brittle crack propagation arrest characteristics and low temperature toughness and process for producing same 失效
标题翻译：钢板脆性裂纹扩展停止特性和低温韧性优良，生产工艺相同
公开(公告)号：US6090226A
公开(公告)日：2000-07-18
申请号：US553307
申请日：1995-11-21
申请人： Toshiei Hasegawa , Tadashi Ishikawa , Yuji Nomiyama
发明人： Toshiei Hasegawa , Tadashi Ishikawa , Yuji Nomiyama
IPC分类号： C21D8/02 , C22C38/00 , C22C38/06 , C22C38/14 , C21C8/02
CPC分类号： C22C38/001 , C21D8/02 , C21D8/0226 , C22C38/06 , C22C38/14 , C21D2211/00 , C21D2221/10
摘要： The present invention relates to a process for producing a structural steel plate, which process greatly improves the excellent brittle crack propagation arrest characteristics and Charpy characteristics at the same time without relying on the addition of costly alloying elements such as Ni. The steel plate is characterized in that the steel plate comprises, based on weight, 0.04 to 0.30% of C, up to 0.5% of Si, up to 2.0% of Mn, up to 0.1% of Al, 0.001 to 0.10% of Ti, 0.001 to 0.01% of N and the balance Fe and unavoidable impurities, that the structure in the front surface region and the back surface region each having a thickness corresponding to 2 to 33% of the plate thickness has an average grain size d of up to 3 .mu.m, and that the structure has a controlled Vickers hardness.
摘要翻译： PCT No.PCT / JP95 / 00602 Sec。 371日期：1995年11月21日 102（e）1995年11月21日日期PCT 1995年3月29日PCT PCT。出版物WO95 / 26424 PCT 日期1995年10月5日本发明涉及一种结构钢板的制造方法，该方法同时大大提高了优异的脆性裂纹扩展停止特性和夏比特性，而不依赖于添加昂贵的合金元素如Ni。所述钢板的特征在于，所述钢板的重量为C：0.04〜0.30％，Si：0.5％以下，Mn：2.0％以下，Al：0.1％以下，Ti：0.001〜0.10％，0.001〜0.01％的N，余量为Fe和不可避免的杂质，表面区域和后表面区域的厚度对应于板厚的2〜33％的结构的平均粒径d为上到3米，并且该结构具有受控维氏硬度。

2. 发明授权

US5389164A Production method of strong and tough thick steel plate 失效
标题翻译：强韧钢板的生产方法
公开(公告)号：US5389164A
公开(公告)日：1995-02-14
申请号：US192875
申请日：1994-02-07
申请人： Atsuhiko Yoshie , Takashi Fujita , Masaaki Fujioka , Yuji Nomiyama , Hiroki Miyawaki
发明人： Atsuhiko Yoshie , Takashi Fujita , Masaaki Fujioka , Yuji Nomiyama , Hiroki Miyawaki
IPC分类号： B21B1/22 , B21B15/00 , C21D8/02
CPC分类号： C21D8/0242 , B21B1/22 , B21B2015/0071 , C21D2211/005 , C21D8/0226
摘要： A steel containing predetermined components is rolled in a recrystallization temperature region or a non-recrystallization temperature region of an austenite and is subsequently subjected to repeated hot bending. Alternatively, a surface layer portion is cooled during rolling of the steel described above to an .alpha. single phase or a .gamma./.alpha. dual phase temperature region, rolling is then effected and is finished at the point of time when the surface temperature of the plate rises above an Ac.sub.3 point due to recuperative heat, and repeated bending is carried out. Still alternatively, the steel described above is rolled to a cumulative reduction ratio of at least 20% in the non-recrystallization temperature region and is then subjected to repeated bending. Further alternatively, the surface layer portion is cooled during hot rolling of the steel described above to an .alpha. single or .gamma./.alpha. dual phase temperature region, rolling is then continued at a cumulative reduction ratio of at least 20% and is finished at the point when the surface temperature of the steel plate rises less than (Ac.sub.3 point--200.degree. C.) due to recuperative heat, and subsequently, repeated bending is carried out.
摘要翻译：含有预定组分的钢在奥氏体的再结晶温度区域或未再结晶温度区域中轧制，随后经受热重复弯曲。或者，在将上述钢轧制期间将表面层部分冷却至α单相或γ/α双相温度区域，然后进行轧制，并在板的表面温度升高的时间点完成由于回热而高于Ac3点，并且进行重复弯曲。或者，将上述钢轧制至非再结晶温度区域的至少20％的累积压下率，然后进行反复弯曲。或者，表面层部分在上述钢的热轧过程中被冷却到α单个或γ/α双相温度区域，然后以至少20％的累积压缩比继续轧制，并在该点当由于回热而使钢板的表面温度升高小于（Ac3点-200℃）时，进行反复弯曲。

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