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公开(公告)号:US6006789A
公开(公告)日:1999-12-28
申请号:US776664
申请日:1997-01-31
申请人: Takaaki Toyooka , Akira Yorifuji , Motoaki Itadani , Toshio Ohnishi , Yuji Hashimoto , Nobuki Tanaka , Hiroyuki Matsui
发明人: Takaaki Toyooka , Akira Yorifuji , Motoaki Itadani , Toshio Ohnishi , Yuji Hashimoto , Nobuki Tanaka , Hiroyuki Matsui
IPC分类号: B21B17/14 , B21B37/00 , B21B37/74 , B21B37/78 , B21B45/00 , B21B45/02 , B21C37/06 , B21C37/08 , B21C37/30 , C21D8/10 , C21D9/08 , F16L9/00 , B23K17/14
CPC分类号: C21D8/10 , B21B37/74 , B21C37/08 , B21C37/0807 , B21C37/30 , B21B17/14 , B21B2045/0227 , B21B37/78 , B21B45/004
摘要: A steel mother pipe obtained by a solid phase butt-welding pipe-making process or a welding pipe-making process is reduced by heating the pipe prior to the reduction at a temperature exceeding 100.degree. C. and lower than 800.degree. C. wherein the temperature of the steel pipe being reduced is controlled within a defined range. The temperature difference along the circumferential direction of the mother pipe at the inlet side of a reducer is within a defined range, and the temperature of the steel pipe at interstand positions of the reducer is also controlled. By virtue of this control, the reduction becomes possible at low load while suppressing work hardening without degrading surface properties. The resultant product pipe has a dimensional accuracy maintained at a high level.
摘要翻译: PCT No.PCT / JP96 / 02334 Sec。 371日期1997年1月31日 102(e)日期1997年1月31日PCT PCT 1996年8月21日PCT公布。 公开号WO97 / 07906 日期1997年3月6日通过在超过100℃且低于800℃的温度下通过加热管道,通过固相对接制管工艺或焊接制管工艺获得的钢母管被减少 ℃,其中钢管的温度降低控制在规定的范围内。 在减速机的入口侧的母管的周向的温差在规定的范围内,也可以控制还原器的夹板位置处的钢管的温度。 通过该控制,能够在低负荷的同时抑制加工硬化而不会降低表面性能。 所得产品管具有维持在高水平的尺寸精度。