Title:
PROCESS FOR PRODUCING SEAMLESS TUBE
Document Type and Number:
WIPO Patent Application WO/2006/106961
Kind Code:
A1
Abstract:
A process which comprises: a first coating step in which a first liquid is applied to the surface of a high-temperature mandrel bar immediately after preceding stretching/rolling to thereby form a water-resistant coating film; a water-cooling step in which the mandrel bar which has undergone the first coating step is cooled with water; a second coating step in which a second liquid is applied to the mandrel bar surface which has undergone the water-cooling step to thereby infiltrate the second liquid into the water-resistant coating film and impart high-temperature adhesion; and a stretching/rolling step, wherein in this stretching/rolling step, the stretching/rolling of a hollow shell with this mandrel bar is initiated within 10 seconds after the second coating step.
Inventors:
SAITOU KENICHI (JP)
IIDA SUMIO (JP)
MORI SHIZUO (JP)
MOTOKI AKIRA (JP)
IIDA SUMIO (JP)
MORI SHIZUO (JP)
MOTOKI AKIRA (JP)
Application Number:
PCT/JP2006/306928
Publication Date:
October 12, 2006
Filing Date:
March 31, 2006
Export Citation:
Assignee:
SUMITOMO METAL IND (JP)
PALACE CHEMICAL CO LTD (JP)
SAITOU KENICHI (JP)
IIDA SUMIO (JP)
MORI SHIZUO (JP)
MOTOKI AKIRA (JP)
PALACE CHEMICAL CO LTD (JP)
SAITOU KENICHI (JP)
IIDA SUMIO (JP)
MORI SHIZUO (JP)
MOTOKI AKIRA (JP)
International Classes:
B21B25/04; B21B17/04
Foreign References:
| JPS61252293A | 1986-11-10 | |||
| JPS63230797A | 1988-09-27 | |||
| JPH08165489A | 1996-06-25 |
Other References:
See also references of EP 1872878A4
None
None
Attorney, Agent or Firm:
Hoshino, Tetsuro c/o Tokyo, Central Patent Firm 3rd Floor (Oak Building Kyobashi 16-10 Kyobashi 1-chom, Chuou-ku Tokyo 31, JP)
Download PDF: