| 摘要 |
PURPOSE: To eliminate the danger of damage because two wall surfaces of a groove have the contacting surface layer in each material by arranging a carbon steel plate at a fixed distance from the wall in the groove, filling the space between the plate and wall with an alloy steel layer having a specific low carbon content and further, leaving only the layer on the wall. CONSTITUTION: The annular groove 1 is machined in a steel-made solid rotor. Thereafter, the layer 2 is formed by using the filling metal, such as the low carbon steel, on the bottom part at two or three times. Successively, the steel plate 4 is set in the groove 1 and at the time of fitting a rim 6 so as to match the wide groove 7 on a supporting surface 3, a surface 8 is pressed to the wall 11 of the groove 1, and as a result, a space 12 is formed between an inclining surface 9 and the second wall 13 of the groove 1. Successively, the layer 14 is laminated in the space 12 and filled to the mouth part 10 of the space. When in use of the filling metal for forming the layer 14 of the low alloy steel having 0.08-0.12% in the range of carbon content, the filling metal is shrunk according to the solidification. As a result, the plate 4 is turned around a part of the plate in the bottom part of the groove and this surface 8 recedes from the wall 11. The groove 7 is engaged with the supporting surface 3 and therefore, the leaving distance of the surface 8 is limited. |
