Title:
原子力プラント用金属管の熱処理方法、およびそれに用いるバッチ式真空熱処理炉、並びにそれにより処理された原子力プラント用金属管
Document Type and Number:
Japanese Patent JP4858659
Kind Code:
B2
Abstract:
In a method for heat treating a metal tube or pipe for a nuclear power plant, the tube or pipe being accommodated in a batch-type vacuum heat treatment furnace, when the tube or pipe is laid down on and is subjected to heat treatment on a plurality of metal cross beams arranged along a longitudinal direction of the tube or pipe, it is possible to suppress scratches to be formed on the outer surface of the tube or pipe and attributable to heat treatment, and to reduce the discoloration on the outer surface of the tube or pipe by holding the tube or pipe and the metal cross beams in indirect contact with each other by virtue of a heat resistant fabric having a thickness of 0.1 to 1.2 mm interposed in between. In this occasion, it is preferable to use a metal tube or pipe having a composition consisting of, in mass%, C: 0.15% or less, Si: 1.00% or less, Mn: 2.0% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 40.0%, Ni: 8.0 to 80.0%, Ti: 0.5% or less, Cu: 0.6% or less, Al: 0.5% or less, and N: 0.20% or less, the balance being Fe and impurities.
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Inventors:
Shoji Kinomura
Shin Takenaka
Shin Takenaka
Application Number:
JP2011503297A
Publication Date:
January 18, 2012
Filing Date:
January 25, 2011
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
G21D1/00; C21D9/08; C22C19/05; F22B1/16; F27B17/00; F27D7/06; C22F1/00; C22F1/10
Domestic Patent References:
| JPH0587305A | 1993-04-06 | |||
| JPH0413653A | 1992-01-17 | |||
| JP2003247023A | 2003-09-05 | |||
| JPS60362A | 1985-01-05 | |||
| JPS6211166A | 1987-01-20 |
Attorney, Agent or Firm:
Michio Mori
Hideyuki Matsunaga
Hideyuki Matsunaga