Title:
A valve gear and a manufacturing method for the same
Document Type and Number:
Japanese Patent JP6157937
Kind Code:
B2
Abstract:
According to one embodiment, there is provided a valve apparatus including a cladding portion that is integrally formed on a sliding-contact surface of either a valve rod (205) or a valve body (204), which serves as a movable member, wherein the cladding portion is formed by inducing a pulsed discharge between an electrode, which is formed of a molded body consisting mainly of a metal, and a treatment target portion of either the valve rod (205) or the valve body (204), so as to weld and deposit a material of the electrode on a surface of the treatment target portion; and a surface layer that is integrally formed on a sliding-contact surface of either a bushing (201) or a sleeve, which serves as a stationary member, wherein the surface layer is formed by forming a first coating film by surface-hardening heat treatment using a metallic cementation.
Inventors:
Tsuji Daisuke
Shindo Kura
Shindo Kura
Application Number:
JP2013121235A
Publication Date:
July 05, 2017
Filing Date:
June 07, 2013
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
F16K1/32; C23C8/64; C23C10/36; C23C10/38; C23C12/00; C23C26/00; F01D25/00
Domestic Patent References:
| JP2004019918A | ||||
| JP2008275035A | ||||
| JP62243778A | ||||
| JP2010110794A | ||||
| JP5179459A | ||||
| JP6010114A | ||||
| JP62255671A |
Foreign References:
| WO2004111305A1 |
Attorney, Agent or Firm:
Kurata Masatoshi
Yoshihiro Fukuhara
Makoto Nakamura
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Katsu Sunagawa
Morisezo Iseki
Takao Ako
Tadashi Inoue
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Yoshihiro Fukuhara
Makoto Nakamura
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Katsu Sunagawa
Morisezo Iseki
Takao Ako
Tadashi Inoue
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi