EP0481844A1 - Stahl mit verbesserter Schweissbarkeit - Google Patents

Stahl mit verbesserter Schweissbarkeit Download PDF

Info

Publication number: EP0481844A1
Authority: EP; European Patent Office
Prior art keywords: steel; improved weldability; silicon; nickel; titanium
Prior art date: 1990-10-18
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

EP91402670A

Other languages

English (en)

French (fr)

Other versions

EP0481844B1 (de

Inventor

Thierry Maurickx

Pascal Verrier

Roland Taillard

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.)

Sollac SA

Original Assignee

Sollac SA

Lorraine de Laminage Continu SA SOLLAC

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.)

1990-10-18

Filing date

1991-10-07

Publication date

1992-04-22

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9401369&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0481844(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1991-10-07 Application filed by Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA

1992-04-22 Publication of EP0481844A1 publication Critical patent/EP0481844A1/de

1995-08-02 Application granted granted Critical

1995-08-02 Publication of EP0481844B1 publication Critical patent/EP0481844B1/de

2011-10-07 Anticipated expiration legal-status Critical

Status Revoked legal-status Critical Current

Links

229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
239000010959 steel Substances 0.000 title claims abstract description 49
PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 26
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 21
229910052710 silicon Inorganic materials 0.000 claims abstract description 19
239000010703 silicon Substances 0.000 claims abstract description 19
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 13
229910052759 nickel Inorganic materials 0.000 claims abstract description 13
RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 11
239000000203 mixture Substances 0.000 claims abstract description 9
239000010936 titanium Substances 0.000 claims abstract description 9
229910052719 titanium Inorganic materials 0.000 claims abstract description 9
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
229910052799 carbon Inorganic materials 0.000 claims abstract description 8
229910052742 iron Inorganic materials 0.000 claims abstract description 8
WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims abstract description 8
229910052758 niobium Inorganic materials 0.000 claims abstract description 8
239000010955 niobium Substances 0.000 claims abstract description 8
GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 8
229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
239000010949 copper Substances 0.000 claims abstract description 7
229910052802 copper Inorganic materials 0.000 claims abstract description 7
238000001816 cooling Methods 0.000 claims description 16
238000000034 method Methods 0.000 claims description 4
230000009466 transformation Effects 0.000 claims description 4
238000003303 reheating Methods 0.000 claims description 3
230000008569 process Effects 0.000 claims description 2
238000003466 welding Methods 0.000 abstract description 15
238000005336 cracking Methods 0.000 abstract description 4
230000001747 exhibiting effect Effects 0.000 abstract 1
XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 22
229910001566 austenite Inorganic materials 0.000 description 8
230000007704 transition Effects 0.000 description 8
PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 5
230000000717 retained effect Effects 0.000 description 5
238000005096 rolling process Methods 0.000 description 5
229910000734 martensite Inorganic materials 0.000 description 3
238000005266 casting Methods 0.000 description 2
238000009749 continuous casting Methods 0.000 description 2
238000004519 manufacturing process Methods 0.000 description 2
230000009467 reduction Effects 0.000 description 2
229910000746 Structural steel Inorganic materials 0.000 description 1
XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
229910052782 aluminium Inorganic materials 0.000 description 1
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
239000000969 carrier Substances 0.000 description 1
238000010276 construction Methods 0.000 description 1
238000000354 decomposition reaction Methods 0.000 description 1
238000006073 displacement reaction Methods 0.000 description 1
238000005553 drilling Methods 0.000 description 1
239000007789 gas Substances 0.000 description 1
238000010438 heat treatment Methods 0.000 description 1
239000001257 hydrogen Substances 0.000 description 1
229910052739 hydrogen Inorganic materials 0.000 description 1
125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
230000006872 improvement Effects 0.000 description 1
150000001247 metal acetylides Chemical class 0.000 description 1
239000001301 oxygen Substances 0.000 description 1
229910052760 oxygen Inorganic materials 0.000 description 1
239000003208 petroleum Substances 0.000 description 1
238000010791 quenching Methods 0.000 description 1
230000000171 quenching effect Effects 0.000 description 1
238000005204 segregation Methods 0.000 description 1
238000003860 storage Methods 0.000 description 1
229910000859 α-Fe Inorganic materials 0.000 description 1

Images

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
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel

Definitions

the present invention relates to a structural steel with improved weldability.
the grades of steel for welded constructions must satisfy a high level of brittle tensile strength at low temperature, this temperature being a function of the stress conditions and the service temperature of the structure.
CTOD Chip Tip Opening Displacement
Fig. 1 represents the transition temperature for a resilience energy of 28 joules as a function of the cooling time from 700 ° to 300 ° C, for a steel of type 355 EMZ.
the resistance to cold cracking of such a steel can be assessed from the hardness-cooling criterion shown in FIG. 2.
the Vickers hardness is greater than 350Hv5. This is explained by the fact that the structure has 80 to 100% martensite.
the subject of the present invention is a steel with improved weldability having good resilience for high welding energies and not requiring preheating before welding.
the subject of the present invention is therefore a steel with improved weldability, characterized in that it contains silicon in a proportion of less than 0.15% and titanium in a proportion of between 0.005 and 0.020%.
Such a steel therefore has good resilience even at high welding energy.
the hardness-cooling criteria curve shown in Fig. 2 shows that the steel with improved weldability has a lower hardness than that of conventional steel 355 EMZ.
the Vickers hardness for cooling the area affected by heat from 700 ° to 300 ° C in 10s is only 280 HV5, against at least 350 HV5 for common steel.
the improved weldability steel according to the invention now has very little martensite, less than 20%.
the steel with improved weldability according to the invention makes it possible to guarantee the mechanical characteristics on a sheet of 50mm thickness as follows:
Such a steel therefore makes it possible, either to guarantee the same characteristics as the usual 355 EMZ steel but to weld with higher welding energies, or by retaining the same welding energy, to guarantee the mechanical characteristics of toughness at a service temperature. weaker allowing then to consider applications in a harsher environment.
the silicon content has an influence on the transition temperature at 28 Joules (TK 28J), therefore on the toughness of the area affected by heat.
the transition temperature at 28 Joules is of the order of -70 ° C.
this temperature below which an energy necessary for rupture at least equal to 28 Joules is guaranteed is no more than -50 ° C.
the improvement in the toughness of the welded joint involves the reduction of the volume fraction of austenite retained which is ensured by the reduction of the silicon content of the steel.
Steel with improved weldability can be obtained, for example, by ladle casting, continuous casting, production in an oven, production in an oxygen steelworks or aluminum quenching.
the description below relates to an example of a method for obtaining sheets 50mm thick with steel according to the present invention.
the steel with improved weldability according to the invention is obtained by continuous casting of a known type, taking the necessary precautions to combat segregation.
the steel undergoes heating at low temperature between the ferrite-austenite transformation temperature AC3 and 1100 ° C., followed by rolling.
the temperature at the end of rolling is between 850 ° and 720 ° C.
the steel is then subjected to accelerated cooling from the end of rolling temperature to 450 ° C at a speed of 3 to 10 ° C per second.

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Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Heat Treatment Of Steel (AREA)
Laminated Bodies (AREA)
Arc Welding In General (AREA)
Rod-Shaped Construction Members (AREA)
Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

EP91402670A 1990-10-18 1991-10-07 Stahl mit verbesserter Schweissbarkeit Revoked EP0481844B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR9012916		1990-10-18
FR9012916A FR2668169B1 (fr)	1990-10-18	1990-10-18	Acier a soudabilite amelioree.

Publications (2)

Publication Number	Publication Date
EP0481844A1 true EP0481844A1 (de)	1992-04-22
EP0481844B1 EP0481844B1 (de)	1995-08-02

Family

ID=9401369

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP91402670A Revoked EP0481844B1 (de)	1990-10-18	1991-10-07	Stahl mit verbesserter Schweissbarkeit

Country Status (11)

Country	Link
US (1)	US5183633A (de)
EP (1)	EP0481844B1 (de)
JP (1)	JPH04297549A (de)
KR (1)	KR940004033B1 (de)
AT (1)	ATE125878T1 (de)
CA (1)	CA2053197C (de)
DE (1)	DE69111744T2 (de)
ES (1)	ES2076490T3 (de)
FI (1)	FI100340B (de)
FR (1)	FR2668169B1 (de)
NO (1)	NO178796C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2728591A1 (fr) *	1994-12-27	1996-06-28	Lorraine Laminage	Acier a soudabilite amelioree

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
TW444109B (en) *	1997-06-20	2001-07-01	Exxon Production Research Co	LNG fuel storage and delivery systems for natural gas powered vehicles
TW436597B (en) *	1997-12-19	2001-05-28	Exxon Production Research Co	Process components, containers, and pipes suitable for containign and transporting cryogenic temperature fluids
JP3524790B2 (ja)	1998-09-30	2004-05-10	株式会社神戸製鋼所	塗膜耐久性に優れた塗装用鋼材およびその製造方法
JP2003124783A (ja) *	2001-10-10	2003-04-25	Mitsubishi Electric Corp	Ｇｍ−Ｃフィルタ
US6852175B2 (en) *	2001-11-27	2005-02-08	Exxonmobil Upstream Research Company	High strength marine structures
JP2005525509A (ja)	2001-11-27	2005-08-25	エクソンモービルアップストリームリサーチカンパニー	天然ガス車両のためのｃｎｇ貯蔵及び送出システム

Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2239092A1 (de) *	1972-08-09	1974-02-28	Rheinstahl Giesserei Ag	Verwendung einer schweissbaren, hoeherfesten, kohlenstoffarmen und schwingungsbeanspruchbaren stahllegierung fuer stahlgusserzeugnisse
FR2212434A1 (de) *	1972-12-31	1974-07-26	Nippon Steel Corp
DE2436419A1 (de) *	1973-07-31	1975-02-20	Nippon Steel Corp	Verfahren zur verbesserung der schweissbarkeit eines stahls
DE2517164A1 (de) *	1975-04-18	1976-10-21	Rheinstahl Giesserei Ag	Verwendung einer schweissbaren, hoeherfesten stahllegierung fuer dickwandige stahlgusserzeugnisse
FR2500482A1 (fr) *	1981-02-26	1982-08-27	Nippon Kokan Kk	Acier pour soudage avec energie mise en jeu elevee
EP0080809A1 (de) *	1981-10-31	1983-06-08	Nippon Steel Corporation	Verfahren zur Herstellung von Stahl mit hoher Festigkeit und hoher Kaltzähigkeit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS4861316A (de) *	1971-12-04	1973-08-28
JPS59110725A (ja) *	1982-12-16	1984-06-26	Kawasaki Steel Corp	溶接性と低温靭性の優れた高張力鋼の製造方法
JPS6089550A (ja) *	1983-10-21	1985-05-20	Sumitomo Metal Ind Ltd	溶接性に優れた耐候性鋼
JPS60174820A (ja) *	1984-02-17	1985-09-09	Kawasaki Steel Corp	低温じん性及び大入熱溶接性が優れた調質高張力鋼の製造方法
JPS6123715A (ja) *	1984-07-10	1986-02-01	Nippon Steel Corp	高張力高靭性鋼板の製造法
JPS6293346A (ja) *	1985-10-18	1987-04-28	Nippon Steel Corp	溶接部のｃｏｄ特性の優れた高張力鋼
JPS63103051A (ja) *	1986-10-20	1988-05-07	Kawasaki Steel Corp	高靭性溶接用鋼

1990
- 1990-10-18 FR FR9012916A patent/FR2668169B1/fr not_active Expired - Fee Related
1991
- 1991-10-07 AT AT91402670T patent/ATE125878T1/de not_active IP Right Cessation
- 1991-10-07 ES ES91402670T patent/ES2076490T3/es not_active Expired - Lifetime
- 1991-10-07 DE DE69111744T patent/DE69111744T2/de not_active Revoked
- 1991-10-07 EP EP91402670A patent/EP0481844B1/de not_active Revoked
- 1991-10-09 US US07/773,434 patent/US5183633A/en not_active Expired - Fee Related
- 1991-10-10 CA CA002053197A patent/CA2053197C/fr not_active Expired - Fee Related
- 1991-10-16 NO NO914055A patent/NO178796C/no not_active IP Right Cessation
- 1991-10-17 KR KR1019910018344A patent/KR940004033B1/ko not_active Expired - Fee Related
- 1991-10-17 FI FI914907A patent/FI100340B/fi not_active IP Right Cessation
- 1991-10-18 JP JP3271272A patent/JPH04297549A/ja active Pending

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2239092A1 (de) *	1972-08-09	1974-02-28	Rheinstahl Giesserei Ag	Verwendung einer schweissbaren, hoeherfesten, kohlenstoffarmen und schwingungsbeanspruchbaren stahllegierung fuer stahlgusserzeugnisse
FR2212434A1 (de) *	1972-12-31	1974-07-26	Nippon Steel Corp
DE2436419A1 (de) *	1973-07-31	1975-02-20	Nippon Steel Corp	Verfahren zur verbesserung der schweissbarkeit eines stahls
DE2517164A1 (de) *	1975-04-18	1976-10-21	Rheinstahl Giesserei Ag	Verwendung einer schweissbaren, hoeherfesten stahllegierung fuer dickwandige stahlgusserzeugnisse
FR2500482A1 (fr) *	1981-02-26	1982-08-27	Nippon Kokan Kk	Acier pour soudage avec energie mise en jeu elevee
EP0080809A1 (de) *	1981-10-31	1983-06-08	Nippon Steel Corporation	Verfahren zur Herstellung von Stahl mit hoher Festigkeit und hoher Kaltzähigkeit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2728591A1 (fr) *	1994-12-27	1996-06-28	Lorraine Laminage	Acier a soudabilite amelioree

Also Published As

Publication number	Publication date
US5183633A (en)	1993-02-02
NO178796C (no)	1996-06-05
NO178796B (no)	1996-02-26
FI914907L (fi)	1992-04-19
CA2053197C (fr)	1997-09-09
DE69111744D1 (de)	1995-09-07
JPH04297549A (ja)	1992-10-21
KR920008204A (ko)	1992-05-27
CA2053197A1 (fr)	1992-04-19
FI914907A0 (fi)	1991-10-17
FR2668169B1 (fr)	1993-01-22
EP0481844B1 (de)	1995-08-02
DE69111744T2 (de)	1996-01-18
FI100340B (fi)	1997-11-14
NO914055D0 (no)	1991-10-16
KR940004033B1 (ko)	1994-05-11
ES2076490T3 (es)	1995-11-01
NO914055L (no)	1992-04-21
FR2668169A1 (fr)	1992-04-24
ATE125878T1 (de)	1995-08-15

Legal Events

Date	Code	Title	Description
1992-03-06	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1992-04-22	17P	Request for examination filed	Effective date: 19920213
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1994-09-14	17Q	First examination report despatched	Effective date: 19940729
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1995-12-06	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)	Effective date: 19951107
1996-05-04	PLBQ	Unpublished change to opponent data	Free format text: ORIGINAL CODE: EPIDOS OPPO
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1996-06-12	PLBF	Reply of patent proprietor to notice(s) of opposition	Free format text: ORIGINAL CODE: EPIDOS OBSO
1996-06-26	26	Opposition filed	Opponent name: THYSSEN STAHL AG Effective date: 19960430
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1998-05-06	NLR2	Nl: decision of opposition

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EP0481844A1 - Stahl mit verbesserter Schweissbarkeit - Google Patents

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