Title:
MANUFACTURE OF SEAMLESS PIPE
Document Type and Number:
Japanese Patent JPS5870955
Kind Code:
A
Abstract:
A process for producing seamless tubes of austenitic steels is disclosed. A metallic melt is continuously poured into a cooled mold having a round molding cavity. The as yet fully unsolidified extracted billet is electromagnetically agitated in a direction about its longitudinal axis. Once hardened, the billet is cross cut, and the castings are subjected to annealing at a temperature between 1100 DEG C. and 1250 DEG C. (preferably between 1150 DEG C. and 1200 DEG C.) for between 30 minutes and 4 hours (preferably between 1 hour and 2 hours). The castings are allowed to cool, are machined into extrusion blooms and the seamless tubes produced by extrusion of the blooms.
Inventors:
YOOHAN SHIYUTEIIBERUREENERU
PEETERU MATSUHANERU
PEETERU MATSUHANERU
Application Number:
JP17336882A
Publication Date:
April 27, 1983
Filing Date:
October 04, 1982
Export Citation:
Assignee:
VER EDELSTAHLWERKE AG
International Classes:
B21C23/08; B22D11/00; B22D11/10; B22D11/115; (IPC1-7): B21C23/08; B22D11/10; B22D11/124
Domestic Patent References:
| JPS5326731A | 1978-03-13 | |||
| JPS5371620A | 1978-06-26 | |||
| JPS55161026A | 1980-12-15 | |||
| JPS55100928A | 1980-08-01 |
Attorney, Agent or Firm:
Osamu Nakahira
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