PURPOSE: To provide the manufacturing method of a powder and granular material-packed tube with good quality without cracking on the outer skin of the tube by obtaining a sound joining welded part.
CONSTITUTION: In the manufacturing method of a powder and granular packed- tube that a powder and granular material preliminarily granulated is fed to a tube like body on the way making a metal plate the tube like body, both edges of the tube like body are joined with a high frequency welding, and a welded tube packed with the powder and granular material is shrunk, the powder and granular material whose susceptibility χg is χg≤(2.00+246P-0.89).10-4 [emu/g{9147/28}, in where P is the welding heat input [kVA], is supplied so as to be made, at least, to the upper layer inside the tube like body. The grain size d of the powder and granular material is preferably d≥0.02P0.6 [mm].
KAGAMI TAKEJI
ONO TORU
YAMADA IWAO
HASHIMOTO HARUJI
