| 摘要 |
According to an embodiment, a valve apparatus (1) includes a movable member (9 or 5) operating in conjunction with opening and closing of a valve, and a stationary member (10, 4, or 8) in sliding or abutting contact with the movable member (9 or 5). The valve apparatus (1) includes a cladding portion (11 or 211) that is integrally formed on a sliding-contact surface or an abutting contact surface of at least one of the movable member (9 or 5) or the stationary member (10, 4, or 8). The cladding portion (11 or 21) is formed by inducing a pulsed discharge between an electrode (102), which is formed of a molded body consisting mainly of a metal, and a treatment target portion of the movable member (9 or 5) or the stationary member (10, 4, or 8), so as to weld and deposit a material of the electrode (102) on a surface of the treatment target portion. |
