ATE312208T1 - METHOD FOR PRODUCING STEEL PIPE WITH ULTRA FINE STRUCTURE - Google Patents

METHOD FOR PRODUCING STEEL PIPE WITH ULTRA FINE STRUCTURE

Info

Publication number
ATE312208T1
ATE312208T1 AT98929659T AT98929659T ATE312208T1 AT E312208 T1 ATE312208 T1 AT E312208T1 AT 98929659 T AT98929659 T AT 98929659T AT 98929659 T AT98929659 T AT 98929659T AT E312208 T1 ATE312208 T1 AT E312208T1
Authority
AT
Austria
Prior art keywords
steel pipe
thetam
tred
transformation point
fine structure
Prior art date
Application number
AT98929659T
Other languages
German (de)
Inventor
Takaaki Toyooka
Akira Yorifuji
Masanori Nishimori
Motoaki Itadani
Yuji Hashimoto
Takatoshi Okabe
Taro Kanayama
Masahiko Morita
Saiji Matsuoka
Nobuki Tanaka
Osamu Furukimi
Takaaki Hira
Original Assignee
Jfe 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
Priority claimed from JP24093097A external-priority patent/JP3896647B2/en
Priority claimed from JP13393398A external-priority patent/JP3622499B2/en
Application filed by Jfe Steel Corp filed Critical Jfe Steel Corp
Priority claimed from PCT/JP1998/002811 external-priority patent/WO1999000525A1/en
Application granted granted Critical
Publication of ATE312208T1 publication Critical patent/ATE312208T1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2201/00—Treatment for obtaining particular effects

Abstract

A steel pipe containing fine ferrite crystal grains, which has excellent toughness and ductility and good ductility-strength balance as well as superior collision impact resistance, and a method for producing the same are provided. A steel pipe containing super-fine crystal grains can be produced by heating a base steel pipe having ferrite grains with an average crystal diameter of di (mum), in which C, Si, Mn and Al are limited within proper ranges, and if necessary, Cu, Ni, Cr and Mo, or Nb, Ti, V, B, etc. are further added, at not higher than the Ac3 transformation point, and applying reducing at an average rolling temperature of thetam (° C.) and a total reduction ratio Tred (%) within s temperature range of from 400 to Ac3 transformation point, with di, thetam and Tred being in a relation satisfying a prescribed equation.
AT98929659T 1997-06-26 1998-06-24 METHOD FOR PRODUCING STEEL PIPE WITH ULTRA FINE STRUCTURE ATE312208T1 (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP17079097 1997-06-26
JP19603897 1997-07-22
JP22331597 1997-08-20
JP22857997 1997-08-25
JP24093097A JP3896647B2 (en) 1997-09-05 1997-09-05 Manufacturing method of high-strength steel pipe with excellent workability
JP13393398A JP3622499B2 (en) 1997-05-15 1998-05-15 Steel pipe manufacturing method
PCT/JP1998/002811 WO1999000525A1 (en) 1997-06-26 1998-06-24 Ultrafine-grain steel pipe and process for manufacturing the same

Publications (1)

Publication Number Publication Date
ATE312208T1 true ATE312208T1 (en) 2005-12-15

Family

ID=29716380

Family Applications (1)

Application Number Title Priority Date Filing Date
AT98929659T ATE312208T1 (en) 1997-06-26 1998-06-24 METHOD FOR PRODUCING STEEL PIPE WITH ULTRA FINE STRUCTURE

Country Status (5)

Country Link
US (1) US20030221753A1 (en)
KR (1) KR100330432B1 (en)
AT (1) ATE312208T1 (en)
DE (1) DE69832684T2 (en)
ID (1) ID21234A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100530078B1 (en) * 2001-12-24 2005-11-22 주식회사 포스코 35kg/mm2 grade hot-rolled steel sheet with a good pipe formability by the mini-mill process and method for manufacturing thereof
US7727342B2 (en) * 2002-02-12 2010-06-01 The Timken Company Low carbon microalloyed steel
DE102014205392A1 (en) * 2014-03-24 2015-09-24 Comtes Fht A. S. Components made of a steel alloy and method for producing high-strength components
JP5909014B1 (en) * 2015-06-08 2016-04-26 オリジン電気株式会社 Bonding member manufacturing method and bonding member manufacturing apparatus
KR20190003649A (en) * 2016-08-30 2019-01-09 신닛테츠스미킨 카부시키카이샤 Flow tube for expandable tubular

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4466842A (en) * 1982-04-03 1984-08-21 Nippon Steel Corporation Ferritic steel having ultra-fine grains and a method for producing the same
DE3415590A1 (en) * 1984-04-24 1985-10-31 Mannesmann AG, 4000 Düsseldorf USE OF A STEEL IN HYDROGEN-LIQUID
CA2004548C (en) * 1988-12-05 1996-12-31 Kenji Aihara Metallic material having ultra-fine grain structure and method for its manufacture
JP2913115B2 (en) * 1990-10-03 1999-06-28 住友金属工業株式会社 Manufacturing method of steel bars with ultrafine structure
US5200005A (en) * 1991-02-08 1993-04-06 Mcgill University Interstitial free steels and method thereof

Also Published As

Publication number Publication date
KR100330432B1 (en) 2002-03-27
DE69832684D1 (en) 2006-01-12
US20030221753A1 (en) 2003-12-04
DE69832684T2 (en) 2006-06-22
KR20000068335A (en) 2000-11-25
ID21234A (en) 1999-05-06

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