EP0705908A2 - Acier C-Mn faiblement allié - Google Patents

Acier C-Mn faiblement allié Download PDF

Info

Publication number
EP0705908A2
EP0705908A2 EP95250205A EP95250205A EP0705908A2 EP 0705908 A2 EP0705908 A2 EP 0705908A2 EP 95250205 A EP95250205 A EP 95250205A EP 95250205 A EP95250205 A EP 95250205A EP 0705908 A2 EP0705908 A2 EP 0705908A2
Authority
EP
European Patent Office
Prior art keywords
steel
weight
content
max
titanium
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
EP95250205A
Other languages
German (de)
English (en)
Other versions
EP0705908A3 (fr
EP0705908B1 (fr
Inventor
Bernhard Koschlig
Wilhelm Nickel
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0705908A2 publication Critical patent/EP0705908A2/fr
Publication of EP0705908A3 publication Critical patent/EP0705908A3/en
Application granted granted Critical
Publication of EP0705908B1 publication Critical patent/EP0705908B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese

Definitions

  • the invention relates to a low-alloy C-Mn steel for steel pipes, in particular for the oil and gas industry according to the preamble of the main claim.
  • the steel specified in the generic term with a C content in percent by weight between 0.20 to 0.40 and a manganese content between 1.0 and 2.0 and an optional addition of chromium, molybdenum and vanadium is preferably used with aluminum but also in combination with Titan calms down. With usual aluminum contents of 0.025 to 0.035, this steel tends to hot crack during solidification, especially during ingot casting. But continuous casting as a raw material also shows this phenomenon.
  • the object of the invention is to provide a low-alloy C-Mn steel which, regardless of whether cast as block or continuous casting, shows only a low susceptibility to hot cracking.
  • the aluminum content in particular has a very significant influence on the susceptibility to hot cracking.
  • the usual additions of aluminum in the range of 0.025 to 0.035 to fully soothe the steel are detrimental in terms of avoiding hot cracks during solidification.
  • the quasi halving of the usual aluminum content does not bring the desired effect if titanium is not simultaneously added in amounts of more than 0.007, preferably more than 0.01. Larger additions of titanium, i.e. H. above 0.025 are not considered to be advantageous since the degree of purity may deteriorate as a result.
  • a steel according to the invention with the standard designation P32MnCrV6 was cast as a block and the hot crack sensitivity was examined using the Gleeble test.
  • the samples showed a constriction of fracture of 96% even at a test temperature of 1350 ° C and no melting phenomena could be seen in the micrograph.
  • the pipes made with this steel on a plug rolling mill showed no defects that could be attributed to hot cracks in the block.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Articles (AREA)
  • Body Structure For Vehicles (AREA)
EP95250205A 1994-09-02 1995-08-20 Acier C-Mn faiblement allié Expired - Lifetime EP0705908B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4432390 1994-09-02
DE4432390A DE4432390C2 (de) 1994-09-02 1994-09-02 Verfahren zur Senkung der Heißrißanfälligkeit bei der Herstellung eines niedriglegierten C-Mn-Stahles

Publications (3)

Publication Number Publication Date
EP0705908A2 true EP0705908A2 (fr) 1996-04-10
EP0705908A3 EP0705908A3 (fr) 1996-05-22
EP0705908B1 EP0705908B1 (fr) 1999-04-28

Family

ID=6527991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95250205A Expired - Lifetime EP0705908B1 (fr) 1994-09-02 1995-08-20 Acier C-Mn faiblement allié

Country Status (5)

Country Link
EP (1) EP0705908B1 (fr)
AT (1) ATE179461T1 (fr)
BR (1) BR9503886A (fr)
DE (2) DE4432390C2 (fr)
ES (1) ES2130525T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2128240A1 (es) * 1996-07-26 1999-05-01 Gsb Grupo Siderurgico Vasco S Procedimiento de fabricacion de aceros microaleados.
CN114606443A (zh) * 2022-03-17 2022-06-10 襄阳金耐特机械股份有限公司 一种高淬透性铸钢

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155950B (en) * 1984-03-01 1988-01-20 Nippon Steel Corp Erw-oil well pipe and process for producing same
JPS63230819A (ja) * 1987-03-20 1988-09-27 Sumitomo Metal Ind Ltd 耐食性に優れた油井管用鋼の製造方法
JPH01283322A (ja) * 1988-05-10 1989-11-14 Sumitomo Metal Ind Ltd 耐食性に優れた高強度油井管の製造方法
JPH0320443A (ja) * 1989-06-15 1991-01-29 Sumitomo Metal Ind Ltd 耐ｓｓｃｃ性に優れた高強度油井管およびその製造方法
GB9116412D0 (en) * 1990-08-03 1991-09-11 Samsung Heavy Ind High toughness non-refined steels and method for manufacturing them
JP2661845B2 (ja) * 1992-09-24 1997-10-08 新日本製鐵株式会社 含オキサイド系耐火用形鋼の制御圧延による製造方法
JPH06116635A (ja) * 1992-10-02 1994-04-26 Kawasaki Steel Corp 耐硫化物応力腐食割れ性に優れた高強度低合金油井用鋼の製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2128240A1 (es) * 1996-07-26 1999-05-01 Gsb Grupo Siderurgico Vasco S Procedimiento de fabricacion de aceros microaleados.
CN114606443A (zh) * 2022-03-17 2022-06-10 襄阳金耐特机械股份有限公司 一种高淬透性铸钢

Also Published As

Publication number Publication date
EP0705908A3 (fr) 1996-05-22
DE59505760D1 (de) 1999-06-02
EP0705908B1 (fr) 1999-04-28
BR9503886A (pt) 1996-09-17
DE4432390C2 (de) 1998-03-26
ATE179461T1 (de) 1999-05-15
DE4432390A1 (de) 1996-03-07
ES2130525T3 (es) 1999-07-01

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