JPS5689307A - Manufacture of seamless steel pipe of sulfur free-cutting steel - Google Patents
Manufacture of seamless steel pipe of sulfur free-cutting steelInfo
- Publication number
- JPS5689307A JPS5689307A JP16541979A JP16541979A JPS5689307A JP S5689307 A JPS5689307 A JP S5689307A JP 16541979 A JP16541979 A JP 16541979A JP 16541979 A JP16541979 A JP 16541979A JP S5689307 A JPS5689307 A JP S5689307A
- Authority
- JP
- Japan
- Prior art keywords
- sulfur free
- steel
- steel pipe
- round billet
- cutting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Metal Rolling (AREA)
- Piles And Underground Anchors (AREA)
Abstract
PURPOSE: To mass produce a seamless steel pipe of sulfur free-cutting steel by the Mannesmann system, while preventing generation of cracks due to the piercing work, by welding an ordinary steel chip to the piercing side of the round billet of the sulfur free-cutting steel.
CONSTITUTION: At manufacturing the seamless steel pipe of sulfur free-cutting steel by the Mannesmann system, a chip of ordinary steel, provided with 60 degrees X-groove, is welded to the tip of a round billet as a blank material on the side of starting the piercing work. Hereupon, a welding is performed so as to prevent anywhere in surface and interior of the jointed part from any defect. Next, a guide hole is bored in the outer end face of the chip welded to the round billet; then, the piercing work is applied all through the round billet by the conventional Mannesmann system. This pierced pipe blank is next stretch reduced and a seamless steel pipe of sulfur free-cutting steel is obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16541979A JPS6035205B2 (en) | 1979-12-19 | 1979-12-19 | Io free-cutting steel manufacturing method for seamless steel pipes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16541979A JPS6035205B2 (en) | 1979-12-19 | 1979-12-19 | Io free-cutting steel manufacturing method for seamless steel pipes |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5689307A true JPS5689307A (en) | 1981-07-20 |
JPS6035205B2 JPS6035205B2 (en) | 1985-08-13 |
Family
ID=15812055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16541979A Expired JPS6035205B2 (en) | 1979-12-19 | 1979-12-19 | Io free-cutting steel manufacturing method for seamless steel pipes |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6035205B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01266905A (en) * | 1988-04-18 | 1989-10-24 | Nippon Steel Corp | Method for rolling tube |
EP0743106A1 (en) * | 1995-05-19 | 1996-11-20 | Nkk Corporation | Method for manufacturing seamless pipe |
EP0801996A1 (en) * | 1994-10-18 | 1997-10-22 | Nkk Corporation | Method for producing a seamless steel tubular product |
-
1979
- 1979-12-19 JP JP16541979A patent/JPS6035205B2/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01266905A (en) * | 1988-04-18 | 1989-10-24 | Nippon Steel Corp | Method for rolling tube |
EP0801996A1 (en) * | 1994-10-18 | 1997-10-22 | Nkk Corporation | Method for producing a seamless steel tubular product |
US5816087A (en) * | 1994-10-18 | 1998-10-06 | Nkk Corporation | Method for producing a seamless steel tubular product |
EP0743106A1 (en) * | 1995-05-19 | 1996-11-20 | Nkk Corporation | Method for manufacturing seamless pipe |
US5778714A (en) * | 1995-05-19 | 1998-07-14 | Nkk Corporation | Method for manufacturing seamless pipe |
US6073331A (en) * | 1995-05-19 | 2000-06-13 | Nkk Corporation | Method for manufacturing seamless pipe |
Also Published As
Publication number | Publication date |
---|---|
JPS6035205B2 (en) | 1985-08-13 |
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