JPS5689307A - Manufacture of seamless steel pipe of sulfur free-cutting steel - Google Patents

Manufacture of seamless steel pipe of sulfur free-cutting steel

Info

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
Application number
JP16541979A
Other languages
Japanese (ja)
Other versions
JPS6035205B2 (en
Inventor
Yasuhiro Sayama
Fusao Togashi
Akio Ejima
Yutaka Hirano
Toru Sugimoto
Takeshi Takahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP16541979A priority Critical patent/JPS6035205B2/en
Publication of JPS5689307A publication Critical patent/JPS5689307A/en
Publication of JPS6035205B2 publication Critical patent/JPS6035205B2/en
Expired legal-status Critical Current

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
JP16541979A 1979-12-19 1979-12-19 Io free-cutting steel manufacturing method for seamless steel pipes Expired JPS6035205B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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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