| 摘要 |
The present invention relates to a method for manufacturing shells, on which shells there on the outer surface of the shell body is attached a belt by friction welding, and for the object of providing a process which is specifically favourable in connection with friction welding of bands to thin-walled shells, it is according to the invention suggested that the shell (1) prior to the welding process is hardened and/or tempered for optimum use properties, and that the shell (1) after hardening and/or tempering receives the belt (3) by friction welding, the temperature of the shell or granade (1) at the same time being kept at a level which does not to a substantial degree reduce the material qualities of said shell. <IMAGE> <IMAGE> |
