Title:
継目無鋼管の製造方法及び酸化性ガス供給装置
Document Type and Number:
Japanese Patent JP4688037
Kind Code:
B2
Abstract:
A production method of a seamless pipe or tube according to the present invention comprises the steps of applying a lubricant containing carbon to a mandrel bar, producing a material pipe or tube with a mandrel mill using the mandrel bar to which the lubricant is applied, and reheating the material pipe or tube in a reheating furnace, wherein when a temperature of the material pipe or tube is 550°C or higher and 1000°C or lower in the reheating step, an oxidizing gas is fed into the material pipe or tube.
Inventors:
Hiroshi Nakaike
Yasuyoshi Hidaka
Hiroshi Nogami
Yasuyoshi Hidaka
Hiroshi Nogami
Application Number:
JP2006096888A
Publication Date:
May 25, 2011
Filing Date:
March 31, 2006
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
B21B25/04; C21D1/74; C21D9/08
Domestic Patent References:
| JP8057505A | ||||
| JP11090511A |
Attorney, Agent or Firm:
Minoru Ohnaka