Title:
排気弁棒の補修方法
Document Type and Number:
Japanese Patent JP6818978
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a repair method for an exhaust valve rod, capable of maintaining high-temperature strength of a seat surface, securing sufficient heat resistance and corrosion resistance, and reducing damage for repair work.SOLUTION: An exhaust valve rod has a substantially columnar shaft part with heat-resistant steel as a base material, and a substantially disc-shaped valve body part 3 provided continuously to a tip part of the shaft part. A repair method for the exhaust valve rod is characterized in that at a repair portion of a valve seat region 6 on a seat surface 3a of the valve body part 3, a padding material is padded with laser welding to form a first padding layer 4, and a second padding layer 5 obtained by padding the padding material with arc welding is formed so as to overlap with the first padding layer 4.SELECTED DRAWING: Figure 3
Inventors:
Daisuke Obama
Nakata Kyoshiro
Hiroshi Sakamoto
Yuichi Ishida
Noboru Ono
Ryosuke Kimura
Hikotaro Ochiai
Ban Keiryu
Nakata Kyoshiro
Hiroshi Sakamoto
Yuichi Ishida
Noboru Ono
Ryosuke Kimura
Hikotaro Ochiai
Ban Keiryu
Application Number:
JP2017045461A
Publication Date:
January 27, 2021
Filing Date:
March 09, 2017
Export Citation:
Assignee:
Mitsui e&s machinery Co., Ltd.
International Classes:
F01L3/20; B23K9/04; B23K26/21; B23K26/342; B23K28/02; B23K31/00; B23K35/30; C22C19/05; F01L3/02; F01L3/24
Domestic Patent References:
JP2000246438A | ||||
JP3175779U | ||||
JP62033089A |
Foreign References:
US4787736 |
Attorney, Agent or Firm:
Eiichi Maruyama
Maruyama Shigeki
Maruyama Tomoki
Maruyama Shigeki
Maruyama Tomoki