Title:
METHOD OF MANUFACTURING ENGINE EXHAUST VALVE FOR LARGE VESSEL
Document Type and Number:
WIPO Patent Application WO/2014/014069
Kind Code:
A1
Abstract:
This method of manufacturing an engine exhaust valve for a large vessel is characterized in that, following multiple iterations of build up welding (S2) using a weld material comprising an Ni-Cr-Al system Ni-base age-hardened alloy so as to cover the distal end of a round bar of steel material, the distal end is subjected to hot die forging to form a head portion while imparting texture adjustments to the weld (S3), and undergoes a solution heat treatment (S4) and an age-hardening heat treatment (S5). This manufacturing method provides an engine exhaust valve for large vessel, having high durability such that it can withstand the high loads encountered in a diesel engine of a large vessel. The weld material may be an alloy wire for build up welding use.
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Inventors:
HORIO HIROTSUGU (JP)
HARA OSAMU (JP)
SUZUKI YOSHITO (JP)
MASUNAGA ATSUO (JP)
HARA OSAMU (JP)
SUZUKI YOSHITO (JP)
MASUNAGA ATSUO (JP)
Application Number:
PCT/JP2013/069558
Publication Date:
January 23, 2014
Filing Date:
July 18, 2013
Export Citation:
Assignee:
DAIDO STEEL CO LTD (JP)
HORIO HIROTSUGU (JP)
HARA OSAMU (JP)
SUZUKI YOSHITO (JP)
MASUNAGA ATSUO (JP)
HORIO HIROTSUGU (JP)
HARA OSAMU (JP)
SUZUKI YOSHITO (JP)
MASUNAGA ATSUO (JP)
International Classes:
B21K1/24; B23K9/00; B23K9/04; B23K31/00; B23K35/30; C22C19/05; F01L3/02; C22C38/00; C22C38/54
Foreign References:
| JPS4722444B | ||||
| JP2011162803A | 2011-08-25 | |||
| JPH1122427A | 1999-01-26 | |||
| JP2000328163A | 2000-11-28 | |||
| JPS59225845A | 1984-12-18 | |||
| JPH1119790A | 1999-01-26 | |||
| JPH0639545A | 1994-02-15 |
Attorney, Agent or Firm:
HAMADA Yuriko et al. (JP)
Yuriko Hamada (JP)
Yuriko Hamada (JP)
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