Process of making seamless metal tube

Details Process of making seamless metal tube Process of making seamless metal tube

1992-05-21

1992-10-27

Heinrich, Samuel M.

Metal fusion bonding

Process

With shaping

228155, 228232, 228 175, 164465, 219 85, 219 612, B23K 1301, B23K 1302

Patent

active

051582279

ABSTRACT:
A process for the continuous manufacture of seamless tube by confining a selected length of metal strip in the form of a tube and with at least two longitudinal abutting edges and completely melting a selected length of such tubular form to form a seamless tube and cooling the formed seamless tube. The cooling is preferably in a controlled atmosphere of nitrogen and the temperature is reduced to about 700.degree. F. before further processing takes place. In a preferred process the material is a single strip of metal formed into a tube with only one longitudinal seam and it is moved continuously through a mould heated by induction heating selectively controlled to cause the tube to preheat to a selected temperature and then be subjected to a temperature bringing the metal to its molten state to form a seamless tube and while the seamless tube is moving it is cooled downstream from the melting zone solidifying the metal and bringing it to a selected temperature before exiting the mould.

REFERENCES:
patent: 2788426 (1957-04-01), Thompson
patent: 2792482 (1957-05-01), Logan et al.
patent: 3164896 (1965-01-01), Fullman
patent: 3248512 (1966-04-01), Sommer
patent: 3610320 (1971-10-01), Izn
patent: 3728782 (1973-04-01), Ziemek
patent: 4129846 (1978-12-01), Yablochnikov
patent: 4560849 (1985-12-01), Migliori et al.

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