Title:
TURBINE ROTOR
Document Type and Number:
Japanese Patent JPS6057011
Kind Code:
A
Abstract:
PURPOSE:To improve yield of a journal by molding low alloy steel portion on a journal body by electroslag rewelding, annealing the low alloy steel portion and then machining it in a journal contour. CONSTITUTION:A turbine rotor 1 is vertically disposed in a rotor bit 2, and half copper molds 3 are joined by bolts around the outer periphery of a journal body to form a mold for a journal. After a molding start plate 5 is placed at the lower end of the copper mold 3 on the rotor bit 2, a consumable electrode material 6 is inserted into the copper mold 3. When the consumable electrode material 6 and the molding start plate 5 are energized, the consumable electrode material 6 is heated by electric resistance of molten slag 7 in the copper mold 3 and drops for settlement from the free end thereof in globules 8 to gradually form a low alloy steel portion 9. Then the low alloy steel portion 9 is machined in such a way as to have a circular section to form notched peripheral grooves 10.
Inventors:
TORITANI HAJIME
ISA HITOSHI
SHIBASHITA NAOAKI
ISA HITOSHI
SHIBASHITA NAOAKI
Application Number:
JP16416783A
Publication Date:
April 02, 1985
Filing Date:
September 08, 1983
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F16C3/02; B22D23/06; B22D23/10; (IPC1-7): B22D23/06; B22D25/02; B22D27/02; F16C3/02
Domestic Patent References:
| JPS5819376U | 1983-02-05 | |||
| JPS56117875A | 1981-09-16 | |||
| JPS577356A | 1982-01-14 |
Attorney, Agent or Firm:
Masami Akimoto