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1. 发明授权

US5513511A Method of producing seamless steel tube by using mandrel mill 失效
标题翻译：使用芯棒式无缝管轧机生产无缝钢管的方法
公开(公告)号：US5513511A
公开(公告)日：1996-05-07
申请号：US231333
申请日：1994-04-22
申请人： Toshio Imae , Hiromu Oka
发明人： Toshio Imae , Hiromu Oka
IPC分类号： B21B17/04
CPC分类号： B21B17/04
摘要： A mandrel mill for rolling seamless steel tubes includes a plurality of roll stands each having a pair of rolls defining a roll groove therebetween, an axis of the rolls of each roll stand being orthogonal to the axis of the rolls of the adjacent roll stands. The mandrel mill further includes a mandrel bar disposed in the roll grooves configured by the roll stands. The ratio between the radius of curvature of a groove bottom of the groove and a distance between the groove bottom of the roll groove of the first stand ranges from 0.46 to 0.54, and that of the second stand ranges from 0.48 to 0.52.
摘要翻译：用于轧制无缝钢管的芯棒式无缝管轧机包括多个辊架，每个辊架具有在其间限定辊槽的一对辊，每个辊架的辊的轴线与相邻辊架的辊的轴线正交。芯棒式无缝管轧机还包括设置在由辊架构成的辊槽中的芯棒。槽的凹槽底部的曲率半径与第一支架的辊槽的槽底之间的距离的比率为0.46〜0.54，第二支架的槽底的距离为0.48〜0.52。

2. 发明授权

US4806163A Mold additives for use in continuous casting 失效
标题翻译：用于连铸的模具添加剂
公开(公告)号：US4806163A
公开(公告)日：1989-02-21
申请号：US122498
申请日：1987-11-05
申请人： Hakaru Nakato , Tsutomu Nozaki , Yasuhiro Habu , Hiromu Oka , Tsunehiro Ueda , Takao Koshikawa , Hideaki Kishimoto , Fumitaka Shimokawa
发明人： Hakaru Nakato , Tsutomu Nozaki , Yasuhiro Habu , Hiromu Oka , Tsunehiro Ueda , Takao Koshikawa , Hideaki Kishimoto , Fumitaka Shimokawa
IPC分类号： C21C7/076 , B22D11/10 , B22D11/108 , B22D11/111 , B28B7/36 , C03C3/112
CPC分类号： B22D11/111
摘要： A mold additive for use in continuous casting, which includes a base material having a chemical composition of CaO--BaO--SiO.sub.2 --F system, and contains 2-15% by weight in total of at least one carbonate of alkali and alkaline earth metals, 2-30% by weight in total of at least one fluoride of alkali and alkaline earth metals and 0.2-10% by weight of carbon, and, if necessary, 2-10% by weight in total of at least one oxide of Fe, Mn and Ni, and has a solidification temperature of not more than 900.degree. C. and a viscosity at 1,300.degree. C. of not more than 3 poises. The base material has a weight ratio of (CaO+BaO)/SiO.sub.2 of 0.6-2.5 and contains not less than 2% by weight of BaO and 2-15% by weight of F.
摘要翻译：一种用于连续铸造的模具添加剂，其包括具有化学组成为CaO-BaO-SiO 2 -F体系的基材，并且含有2-15重量％的至少一种碱金属和碱土金属的碳酸盐， 2-30重量％的碱金属和碱土金属的至少一种氟化物和0.2-10重量％的碳，如果需要，总共含有2-10重量％的至少一种Fe， Mn和Ni，固化温度不超过900℃，1,300℃下的粘度不大于3泊。基材的重量比（CaO + BaO）/ SiO 2为0.6〜2.5，含有不少于2重量％的BaO和2〜15重量％的F。

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