Title:
金属管の製造方法
Document Type and Number:
Japanese Patent JP4586938
Kind Code:
B2
Abstract:
In this method, the inner surface of a metal pipe containing, by mass percent, 20 to 55% of Cr and 20 to 70% of Ni is subjected to mechanical treatment, the metal pipe is subjected to heat treatment such as to be held in a temperature range of 1050 to 1270°C for 0.5 to 60 minutes, and thereby an oxide scale layer consisting mainly of Cr is formed on at least the inner surface of the metal pipe. A metal pipe excellent in carburization resistance and coking resistance in a carburizing gas environment can be obtained by the method.
Inventors:
Yoshitaka Nishiyama
Masaki Ueyama
Hitoshi Toyota
Masaki Ueyama
Hitoshi Toyota
Application Number:
JP2010506734A
Publication Date:
November 24, 2010
Filing Date:
February 15, 2010
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
C23C8/10; C21D1/76; C21D9/08; C22C19/05; C22C27/06; C22C38/00; C22C38/60; C22F1/10; C22F1/11; C23C8/12; C23C8/14; C23C8/16; C23C8/18; B24C1/00; C21D7/06; C22F1/00
Domestic Patent References:
| JPH0247249A | 1990-02-16 | |||
| JP2002121630A | 2002-04-26 | |||
| JP2007284704A | 2007-11-01 | |||
| JPH01259156A | 1989-10-16 | |||
| JPH01279741A | 1989-11-10 | |||
| JPH0339461A | 1991-02-20 | |||
| JP2003176824A | 2003-06-27 | |||
| JP2003239060A | 2003-08-27 | |||
| JPH0499860A | 1992-03-31 |
Foreign References:
| WO2005078148A1 | 2005-08-25 |
Attorney, Agent or Firm:
Mikiji Sugioka
Terutada Hogami
Chihara
Terutada Hogami
Chihara