Title:
MANUFACTURING METHOD OF HEAT TRANSFER PIPE, HEAT TRANSFER PIPE, AND BOILER INCLUDING THE SAME
Document Type and Number:
Japanese Patent JP2018136085
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a heat transfer pipe capable of executing solid solution heat treatment and shot-peening for a necessary region, and manufacturing a heat transfer pipe efficiently.SOLUTION: A manufacturing method of a heat transfer pipe comprises: a bending step of bending a heat transfer pipe 63 so as to form a steam inlet part 63, a folding part 63c and a steam outlet part 63b; a heat treatment step of, after the bending step, heating the heat transfer pipe 63 to perform solid solution heat treatment; an inlet side shot-peening step of, after the heat treatment step, subjecting an internal surface of the heat transfer pipe 63 to shot-peening from the steam inlet part 63a to a middle position reaching the folding part 63c, to form an inlet side shot-peening region L1; and an outlet side shot-peening step of, after the heat treatment step, subjecting the internal surface of the heat transfer pipe 63 to shot-peening from the steam outlet part 63b to a middle position reaching the folding part 63c, to form an outlet side shot-peening region L2.SELECTED DRAWING: Figure 5
Inventors:
TAZAKI KENICHI
KUBOTA OSAMU
NAKAGAWA RYOSUKE
MIYAZAWA NORIYUKI
MANABE KOSEI
KUBOTA OSAMU
NAKAGAWA RYOSUKE
MIYAZAWA NORIYUKI
MANABE KOSEI
Application Number:
JP2017031188A
Publication Date:
August 30, 2018
Filing Date:
February 22, 2017
Export Citation:
Assignee:
MITSUBISHI HITACHI POWER SYS
International Classes:
F22B37/10; B24C1/10; C21D7/06; F22B37/04; F28F19/00; F28F21/08
Domestic Patent References:
| JP2010164207A | 2010-07-29 | |||
| JPH0979776A | 1997-03-28 | |||
| JPS5341617B2 | 1978-11-06 | |||
| JPS6353212A | 1988-03-07 | |||
| JP2012201975A | 2012-10-22 | |||
| JP2009068079A | 2009-04-02 | |||
| JP2006307313A | 2006-11-09 |
Foreign References:
| WO2013073055A1 | 2013-05-23 | |||
| US20080149047A1 | 2008-06-26 | |||
| WO2008023410A1 | 2008-02-28 |
Attorney, Agent or Firm:
Noriharu Fujita
Miori Takao
Kawakami Miki
Daisuke Nagata
Miori Takao
Kawakami Miki
Daisuke Nagata