| 摘要 |
A pressure-sensitive device for detecting fluid pressure in which fluid flows in a cap member via a joint is disclosed so as to securely joint the cap member to the joint. A washer-shaped nickel plate is arranged between a flange portion of the copper joint and the stainless-steel cap member, and the outer peripheral edge thereof is laser-welded. The nickel plate, a part of the flange portion and a part of the flat portion are melt and welded. As a result, a melt-solidified layer is formed in all over gap between the flange portion of the joint and the flat portion of the cap member so as to enter deeply from the outer peripheral edge of the flange portion toward the axis L of the joint between the flat portion and the flange portion. Furthermore, the melt-solidified layer is composed on copper, nickel and iron that are melt and solidified. |
