Title:
PRODUCTION OF CONTINUOUSLY CAST SLAB FOR PRODUCING SEAMLESS STEEL TUBE
Document Type and Number:
Japanese Patent JP3646417
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce the producing cost of a seamless steel tube containing Cr by using saddle type roll having a prescribed angle range of an opening angle at the caliber bottom in one pair of rolls.
SOLUTION: Rolling reduction is applied to a cast billet 1 during continuous casting through a round mold with one pair of rolls 43 arranged near the completion of solidifying of the cast billet 2. Successively, in a method for producing a tube stock for the seamless steel tube by cutting off the cast billet to make a round billet and using a Mannesman piercing method, the saddle type roll having 70°≤δ≤115° opening angle δ45 at the caliber bottom is used as one pair of rolls 43, or a flat roll as one side roll in one pair of rolls and the saddle type roll having 100°≤δ≤140° opening angle δ45 at the caliber bottom as the other side roll, are used.
Inventors:
Tatsuro Katsumura
Takashi Arizumi
Yu Tsuchida
Takashi Arizumi
Yu Tsuchida
Application Number:
JP20045496A
Publication Date:
May 11, 2005
Filing Date:
July 30, 1996
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B22D11/00; B21B1/46; B21B19/04; B21J1/02; B22D11/128; B22D11/20; C22C38/00; C22C38/18; (IPC1-7): B22D11/128; B21B1/46; B21B19/04; B22D11/20
Domestic Patent References:
| JP9174211A | ||||
| JP5337510A | ||||
| JP59137169A | ||||
| JP58009258U | ||||
| JP59191554A | ||||
| JP7108358A | ||||
| JP5007990A | ||||
| JP7164020A | ||||
| JP7204812A | ||||
| JP63171255A | ||||
| JP59076651A |
Attorney, Agent or Firm:
Yasumitsu Nakahama