EP0787812B1 - Procédé de fabrication d'une pièce forgée en acier - Google Patents

Procédé de fabrication d'une pièce forgée en acier Download PDF

Info

Publication number: EP0787812B1
Authority: EP; European Patent Office
Prior art keywords: optionally; process according; temperature; steel; heat treatment
Prior art date: 1996-02-08
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.): Expired - Lifetime

Application number

EP97400025A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP0787812A1 (fr

Inventor

Jacques Bellus

Pierre Jolly

Claude Pichard

Vincent Jacot

Christian Tomme

Daniel Robat

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.)

Ascometal France Holding SAS

Original Assignee

Ascometal SA

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.)

1996-02-08

Filing date

1997-01-08

Publication date

2004-03-17

1997-01-08 Application filed by Ascometal SA filed Critical Ascometal SA

1997-08-06 Publication of EP0787812A1 publication Critical patent/EP0787812A1/fr

2004-03-17 Application granted granted Critical

2004-03-17 Publication of EP0787812B1 publication Critical patent/EP0787812B1/fr

2017-01-08 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

229910000831 Steel Inorganic materials 0.000 title claims description 31
239000010959 steel Substances 0.000 title claims description 31
238000000034 method Methods 0.000 title claims description 23
230000008569 process Effects 0.000 title claims description 15
238000005242 forging Methods 0.000 title claims description 12
238000004519 manufacturing process Methods 0.000 title claims description 9
238000001816 cooling Methods 0.000 claims description 17
238000010438 heat treatment Methods 0.000 claims description 12
229910001563 bainite Inorganic materials 0.000 claims description 11
239000000203 mixture Substances 0.000 claims description 10
229910052710 silicon Inorganic materials 0.000 claims description 10
239000010703 silicon Substances 0.000 claims description 10
229910052799 carbon Inorganic materials 0.000 claims description 8
239000010955 niobium Substances 0.000 claims description 8
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
239000000126 substance Substances 0.000 claims description 7
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
239000011572 manganese Substances 0.000 claims description 6
PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
229910000859 α-Fe Inorganic materials 0.000 claims description 6
OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 5
NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
229910052782 aluminium Inorganic materials 0.000 claims description 5
XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
229910052797 bismuth Inorganic materials 0.000 claims description 5
JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 5
239000011575 calcium Substances 0.000 claims description 5
229910052791 calcium Inorganic materials 0.000 claims description 5
229910000734 martensite Inorganic materials 0.000 claims description 5
229910052758 niobium Inorganic materials 0.000 claims description 5
GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 5
PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims description 5
ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 4
229910052796 boron Inorganic materials 0.000 claims description 4
229910052748 manganese Inorganic materials 0.000 claims description 4
239000010936 titanium Substances 0.000 claims description 4
229910052719 titanium Inorganic materials 0.000 claims description 4
239000004411 aluminium Substances 0.000 claims description 3
229910052802 copper Inorganic materials 0.000 claims description 3
239000010949 copper Substances 0.000 claims description 3
239000012535 impurity Substances 0.000 claims description 3
229910052742 iron Inorganic materials 0.000 claims description 3
238000012423 maintenance Methods 0.000 claims description 3
238000010791 quenching Methods 0.000 claims description 3
230000000171 quenching effect Effects 0.000 claims description 3
229910052711 selenium Inorganic materials 0.000 claims description 3
239000011669 selenium Substances 0.000 claims description 3
229910052714 tellurium Inorganic materials 0.000 claims description 3
230000009466 transformation Effects 0.000 claims description 2
239000005864 Sulphur Substances 0.000 claims 1
235000019362 perlite Nutrition 0.000 claims 1
239000010451 perlite Substances 0.000 claims 1
XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 14
230000015572 biosynthetic process Effects 0.000 description 8
229910052717 sulfur Inorganic materials 0.000 description 5
240000008042 Zea mays Species 0.000 description 4
VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
229910001566 austenite Inorganic materials 0.000 description 3
239000011651 chromium Substances 0.000 description 3
229910052720 vanadium Inorganic materials 0.000 description 3
LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
229910052804 chromium Inorganic materials 0.000 description 2
230000000694 effects Effects 0.000 description 2
WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
229910052759 nickel Inorganic materials 0.000 description 2
238000012545 processing Methods 0.000 description 2
238000003303 reheating Methods 0.000 description 2
239000011593 sulfur Substances 0.000 description 2
238000005496 tempering Methods 0.000 description 2
230000007704 transition Effects 0.000 description 2
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
229910001868 water Inorganic materials 0.000 description 2
XACAZEWCMFHVBX-UHFFFAOYSA-N [C].[Mo] Chemical compound [C].[Mo] XACAZEWCMFHVBX-UHFFFAOYSA-N 0.000 description 1
238000005452 bending Methods 0.000 description 1
230000008901 benefit Effects 0.000 description 1
VNTLIPZTSJSULJ-UHFFFAOYSA-N chromium molybdenum Chemical compound [Cr].[Mo] VNTLIPZTSJSULJ-UHFFFAOYSA-N 0.000 description 1
230000002542 deteriorative effect Effects 0.000 description 1
230000000670 limiting effect Effects 0.000 description 1
238000003754 machining Methods 0.000 description 1
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 description 1
238000005259 measurement Methods 0.000 description 1
229910052750 molybdenum Inorganic materials 0.000 description 1
239000011733 molybdenum Substances 0.000 description 1
IOUVKUPGCMBWBT-QNDFHXLGSA-N phlorizin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC(O)=CC(O)=C1C(=O)CCC1=CC=C(O)C=C1 IOUVKUPGCMBWBT-QNDFHXLGSA-N 0.000 description 1
230000001737 promoting effect Effects 0.000 description 1
238000012360 testing method Methods 0.000 description 1

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
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite

Definitions

the present invention relates to the manufacture of forged parts at high characteristics, in steel.
High-characteristic forgings made of steel, and in particular the forgings with high characteristics for the automobile, are manufactured according to different techniques which each have drawbacks.
the parts are made of steel of the chromium-molybdenum type, the chemical composition of which comprises, by weight, 0.25% to 0.45% carbon, approximately 1% chromium and approximately 0.25% carbon molybdenum.
the parts are forged and then subjected to a heat treatment of quenching and tempering intended to give them a tempered martensitic structure to obtain in particular a tensile strength Rm of the order of 1000 MPa.
This technique has the disadvantage of being costly and sometimes of generating deformations of the geometry of the parts.
the forged parts can also be made of a steel containing less carbon than in the previous case, and be soaked with water in the hot forging to give them a bainitic or bainito-martensitic structure.
This technique makes it possible to obtain a tensile strength Rm greater than 1000 MPa and an elastic limit Rp 0.2 greater than 800 MPa, but it has the drawback of requiring water quenching which, sometimes, generates geometric deformations imposing the need for a straightening operation or which may even be unacceptable.
Some parts finally, are made of steel containing between 0.3% and 0.4% carbon and between 1.9% and 2.5% manganese. They are cooled to the air after forging so as to present a bainitic structure to high mechanical characteristics. But, these pieces often have segregated bands with martensitic structure making machining difficult.
the aim of the present invention is to propose a method for the manufacture of forgings with high characteristics which remedies these disadvantages.
the carbon content is less than or equal to 0.3%, of preferably also, the manganese content is less than 1.6%.
the silicon content can be, preferably, either greater than 1.2% or less than 0.8%.
the cooling rate Vr is greater than 2 ° C / s.
the part After maintaining between Tm and Tf, the part can be cooled to the ambient temperature and possibly subject to tempering between 150 ° C and 650 ° C.
the part can also be reheated to a temperature below 650 ° C, then cooled to the ambient temperature.
the heat treatment can be carried out either after heating the forged part to a temperature higher than AC 3 , or directly after forging.
a piece of steel is supplied with this composition and it is hot forged after having heated it to a temperature above AC 3, preferably above 1150 ° C., and better still, between 1200 ° C and 1280 ° C, so as to give it an entirely austenitic structure and a sufficiently low flow stress.
the part is subjected to a heat treatment which can be carried out either directly in the hot forging, or after cooling of the part and reheating above the temperature AC 3 of the steel.
the heat treatment involves cooling at a speed of cooling Vr measured at the passage at 700 ° C greater than 0.5 ° C / s, and preferably greater than 2 ° C / s, up to a temperature Tm between Ms + 100 ° C and Ms-20 ° C, Ms being the temperature at the start of transformation martensitic of steel.
This cooling is followed by holding for a time greater than 2 min between the temperature Tm and a temperature Tf ⁇ Tm-100 ° C, and preferably Tf ⁇ Tm-60 ° C. Maintenance is followed by either cooling to room temperature possibly supplemented by a heat between 150 ° C and 650 ° C, i.e. reheating to a temperature less than or equal to 650 ° C before cooling to temperature room.
This heat treatment is to give the room a structure essentially bainitic with less than 20% ferrite and at least 15%, and preferably at least 30%, of lower bainite formed between Tm and Tf. he can be carried out on the whole part or simply on a part having a special functionality.
Tm, Tf, duration The conditions of maintenance (Tm, Tf, duration), as well as the proportions of each of the structures, and in particular the proportion of lower bainite, can be determined, in a manner known to those skilled in the art, using dilatometric measurements on test bars.
the parts thus obtained have the advantage of having a tensile strength Rm between 950 MPa and 1150 MPa, an elastic limit Rp 0.2 greater than 750 MPa, a Mesnager K resilience greater than 25 Joules / Cm 2 at 20 ° C, machinability at least equal to that of parts with a ferritic-pearlitic structure and good fatigue strength: ⁇ D / Rm> 0.5 in rotary bending at 2x10 6 cycles.
an axle was manufactured with a steel whose chemical composition included in% by weight: VS Yes mn Or Cr MB Cu V al B Ti Nb 0.25 0.5 1.67 0.09 0.52 - 0.199 0.2 0.03 - 0.02 - this steel also contained 0.065% S to improve machinability. Its Ms temperature was 380 ° C.
the part was hot forged between 1280 ° C and 1050 ° C. Directly after forging, the part was cooled with blown air at a speed of 2.6 ° C / s until the temperature of 425 ° C, then maintained between 425 ° C and 400 ° C for 10 min; finally, the part was cooled to room temperature by natural air cooling.
a rocket was made from steel, the chemical composition of which, in% by weight: VS Yes mn Or Cr MB Cu V al B Ti Nb 0.25 0.5 1.63 0.006 0.51 0.09 0.196 0,107 0,038 0,003 0,023 - this steel also contained 0.05% S to improve machinability. Its Ms temperature was 385 ° C.
the part was hot forged between 1270 ° C and 1040 ° C. Directly after forging, the part was cooled with blown air at a speed of 2.6 ° C / s until the temperature of 400 ° C, then maintained between 400 ° C and 380 ° C for 10 min; the room was then brought to the temperature of 550 ° C for 1 hour, then it has been cooled to room temperature by natural air cooling.
a ball joint was made with a steel whose chemical composition included, in% by weight: VS Yes mn Or Cr MB Cu V al B Ti Nb 0.28 0.79 1.63 0.05 0.5 0.09 0.19 - 0.04 0.0033 0,023 - this steel also contained 0.06% S to improve machinability. Its Ms temperature was 350 ° C.
the part was hot forged between 1270 ° C and 1060 ° C. Directly after forging, the workpiece was cooled in still air at a speed of 1.19 ° C / s until the temperature of 380 ° C, then maintained between 380 ° C and 360 ° C for 10 min; finally, the part was cooled to room temperature by natural air cooling.
the parts thus obtained can in particular be parts for automotive such as wishbones, drive shafts, connecting rods, but they can also be shafts, cams or any another forged part for various machines.

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Physics & Mathematics (AREA)
Thermal Sciences (AREA)
Crystallography & Structural Chemistry (AREA)
Heat Treatment Of Steel (AREA)
Forging (AREA)

EP97400025A 1996-02-08 1997-01-08 Procédé de fabrication d'une pièce forgée en acier Expired - Lifetime EP0787812B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR9601525A FR2744733B1 (fr)	1996-02-08	1996-02-08	Acier pour la fabrication de piece forgee et procede de fabrication d'une piece forgee
FR9601525		1996-02-08

Publications (2)

Publication Number	Publication Date
EP0787812A1 EP0787812A1 (fr)	1997-08-06
EP0787812B1 true EP0787812B1 (fr)	2004-03-17

Family

ID=9488967

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP97400025A Expired - Lifetime EP0787812B1 (fr)	1996-02-08	1997-01-08	Procédé de fabrication d'une pièce forgée en acier

Country Status (18)

Country	Link
US (1)	US5820706A (pt)
EP (1)	EP0787812B1 (pt)
JP (1)	JP3915043B2 (pt)
KR (1)	KR970062058A (pt)
AR (1)	AR005719A1 (pt)
AT (1)	ATE262047T1 (pt)
BR (1)	BR9700917A (pt)
CA (1)	CA2196029A1 (pt)
CZ (1)	CZ293691B6 (pt)
DE (1)	DE69728076T2 (pt)
DK (1)	DK0787812T3 (pt)
ES (1)	ES2217374T3 (pt)
FR (1)	FR2744733B1 (pt)
HU (1)	HUP9700269A3 (pt)
NO (1)	NO970548L (pt)
PL (1)	PL182920B1 (pt)
PT (1)	PT787812E (pt)
SI (1)	SI9700025B (pt)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2011124851A2 (fr)	2010-04-07	2011-10-13	Ascometal	Pièce mécanique en acier à hautes caractéristiques et son procédé de fabrication
WO2013117953A1 (en)	2012-02-10	2013-08-15	Ascometal	Process for making a steel part, and steel part so obtained
EP2957643A1 (fr)	2014-06-16	2015-12-23	ASCO Industries	Acier pour pièces mécaniques à hautes caractéristiques traitées superficiellement, et pièces mécaniques en cet acier et leur procédé de fabrication
EP3168312A1 (de)	2015-11-16	2017-05-17	Deutsche Edelstahlwerke GmbH	Edelbaustahl mit bainitischem gefüge, daraus hergestelltes schmiedeteil und verfahren zur herstellung eines schmiedeteils
WO2022253912A1 (fr)	2021-06-02	2022-12-08	Ascometal France Holding Sas	Pièce en acier mise en forme à chaud et procédé de fabrication

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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
WO2001047500A1 (en) *	1999-12-23	2001-07-05	Pfizer Products Inc.	Hydrogel-driven drug dosage form
JP3888865B2 (ja) *	2000-10-25	2007-03-07	株式会社ゴーシュー	鍛造方法
US7416617B2 (en)	2002-10-01	2008-08-26	Sumitomo Metal Industries, Ltd.	High strength seamless steel pipe excellent in hydrogen-induced cracking resistance
FR2847910B1 (fr) *	2002-12-03	2006-06-02	Ascometal Sa	Procede de fabrication d'une piece forgee en acier et piece ainsi obtenue.
JP4375971B2 (ja) *	2003-01-23	2009-12-02	大同特殊鋼株式会社	高強度ピニオンシャフト用鋼
AR047467A1 (es)	2004-01-30	2006-01-18	Sumitomo Metal Ind	Tubo de acero sin costura para pozos petroliferos y procedimiento para fabricarlo
EP1700925B1 (en)	2005-03-09	2009-09-09	Ovako Bar Oy Ab	High-strength air cooled steel alloy and hot worked product
JP3816937B1 (ja) *	2005-03-31	2006-08-30	株式会社神戸製鋼所	熱間成形品用鋼板およびその製造方法並びに熱間成形品
JP4677868B2 (ja) *	2005-09-26	2011-04-27	大同特殊鋼株式会社	高強度かつ高靱性で溶接可能な鋼とそれを使用した部材の製造方法
DE102006060994B4 (de) *	2006-12-20	2010-02-11	Zf Friedrichshafen Ag	Kugelzapfen und -hülsen aus nichtrostendem Stahl
US9132567B2 (en)	2007-03-23	2015-09-15	Dayton Progress Corporation	Tools with a thermo-mechanically modified working region and methods of forming such tools
US8968495B2 (en) *	2007-03-23	2015-03-03	Dayton Progress Corporation	Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels
FR2916371B1 (fr) *	2007-05-24	2010-02-26	Fwu Kuang Entpr Co Ltd	Procede de preparation de pieces forgees ayant une resistance a la traction et un allongement excellents a partir de fils mamchine en acier
FR2931166B1 (fr) *	2008-05-15	2010-12-31	Arcelormittal Gandrange	Acier pour forge a chaud a hautes caracteristiques mecaniques des pieces produites
JP5483859B2 (ja) *	2008-10-31	2014-05-07	臼井国際産業株式会社	焼入性に優れた高強度鋼製加工品及びその製造方法、並びに高強度かつ耐衝撃特性及び耐内圧疲労特性に優れたディーゼルエンジン用燃料噴射管及びコモンレールの製造方法
NL2002248C2 (en) *	2008-11-24	2010-05-26	Weweler Nv	Hardening of flexible trailing arms.
DE102009016079B4 (de)	2009-04-03	2018-09-06	Zf Friedrichshafen Ag	Kugelzapfen aus einem Stahl mit bainitischem Gefüge und Verfahren zur Herstellung derartiger Kugelzapfen
CN102444573A (zh) *	2010-10-11	2012-05-09	上海腾辉锻造有限公司	一种锻件泵轴的制造方法
ES2391322B1 (es) *	2011-04-29	2013-10-14	Consejo Superior De Investigaciones Científicas (Csic)	ACERO BAINÍTICO 38MnV6, PROCEDIMIENTO DE OBTENCIÓN Y USO.
US9440693B2 (en) *	2014-03-20	2016-09-13	Caterpillar Inc.	Air-hardenable bainitic steel part
WO2016151345A1 (fr)	2015-03-23	2016-09-29	Arcelormittal	Pieces a structure bainitique a hautes proprietes de resistance et procede de fabrication
WO2019180492A1 (en)	2018-03-23	2019-09-26	Arcelormittal	Forged part of bainitic steel and a method of manufacturing thereof

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1996
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1997
- 1997-01-08 AT AT97400025T patent/ATE262047T1/de active
- 1997-01-08 PT PT97400025T patent/PT787812E/pt unknown
- 1997-01-08 ES ES97400025T patent/ES2217374T3/es not_active Expired - Lifetime
- 1997-01-08 DE DE69728076T patent/DE69728076T2/de not_active Expired - Lifetime
- 1997-01-08 EP EP97400025A patent/EP0787812B1/fr not_active Expired - Lifetime
- 1997-01-08 DK DK97400025T patent/DK0787812T3/da active
- 1997-01-27 CA CA002196029A patent/CA2196029A1/fr not_active Abandoned
- 1997-01-28 HU HU9700269A patent/HUP9700269A3/hu unknown
- 1997-02-04 SI SI9700025A patent/SI9700025B/sl unknown
- 1997-02-05 AR ARP970100459A patent/AR005719A1/es unknown
- 1997-02-06 KR KR1019970003801A patent/KR970062058A/ko not_active Application Discontinuation
- 1997-02-06 NO NO970548A patent/NO970548L/no unknown
- 1997-02-07 BR BR9700917A patent/BR9700917A/pt not_active IP Right Cessation
- 1997-02-07 PL PL97318366A patent/PL182920B1/pl unknown
- 1997-02-07 CZ CZ1997378A patent/CZ293691B6/cs not_active IP Right Cessation
- 1997-02-10 US US08/797,135 patent/US5820706A/en not_active Expired - Lifetime
- 1997-02-10 JP JP04166097A patent/JP3915043B2/ja not_active Expired - Fee Related

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Publication number	Priority date	Publication date	Assignee	Title
WO2011124851A2 (fr)	2010-04-07	2011-10-13	Ascometal	Pièce mécanique en acier à hautes caractéristiques et son procédé de fabrication
WO2013117953A1 (en)	2012-02-10	2013-08-15	Ascometal	Process for making a steel part, and steel part so obtained
EP2957643A1 (fr)	2014-06-16	2015-12-23	ASCO Industries	Acier pour pièces mécaniques à hautes caractéristiques traitées superficiellement, et pièces mécaniques en cet acier et leur procédé de fabrication
EP3168312A1 (de)	2015-11-16	2017-05-17	Deutsche Edelstahlwerke GmbH	Edelbaustahl mit bainitischem gefüge, daraus hergestelltes schmiedeteil und verfahren zur herstellung eines schmiedeteils
WO2017085072A1 (de)	2015-11-16	2017-05-26	Deutsche Edelstahlwerke Gmbh	Edelbaustahl mit bainitischem gefüge, daraus hergestelltes schmiedeteil und verfahren zur herstellung eines schmiedeteils
RU2703085C1 (ru) *	2015-11-16	2019-10-15	Дойче Эдельштальверке Спешелти Стил Гмбх Унд Ко. Кг	Конструкционная сталь с бейнитной структурой, получаемые из нее кованые детали и способ производства кованой детали
WO2022253912A1 (fr)	2021-06-02	2022-12-08	Ascometal France Holding Sas	Pièce en acier mise en forme à chaud et procédé de fabrication
FR3123659A1 (fr)	2021-06-02	2022-12-09	Ascometal France Holding Sas	Pièce en acier mise en forme à chaud et procédé de fabrication

Also Published As

Publication number	Publication date
CA2196029A1 (fr)	1997-08-09
HUP9700269A3 (en)	1999-04-28
NO970548L (no)	1997-08-11
DE69728076D1 (de)	2004-04-22
PL318366A1 (en)	1997-08-18
PT787812E (pt)	2004-09-30
PL182920B1 (pl)	2002-04-30
DK0787812T3 (da)	2004-07-26
FR2744733B1 (fr)	1998-04-24
CZ293691B6 (cs)	2004-07-14
SI9700025B (sl)	2002-02-28
NO970548D0 (no)	1997-02-06
EP0787812A1 (fr)	1997-08-06
AR005719A1 (es)	1999-07-14
MX9700924A (es)	1998-05-31
ATE262047T1 (de)	2004-04-15
HUP9700269A2 (hu)	1998-04-28
US5820706A (en)	1998-10-13
DE69728076T2 (de)	2004-08-05
FR2744733A1 (fr)	1997-08-14
CZ37897A3 (en)	1997-08-13
BR9700917A (pt)	1998-09-01
ES2217374T3 (es)	2004-11-01
JPH09209086A (ja)	1997-08-12
HU9700269D0 (en)	1997-03-28
SI9700025A (en)	1997-10-31
JP3915043B2 (ja)	2007-05-16
KR970062058A (ko)	1997-09-12

Publication	Publication Date	Title
EP0787812B1 (fr)	2004-03-17	Procédé de fabrication d'une pièce forgée en acier
EP0851038B1 (fr)	2003-03-26	Acier et procédé pour la fabrication d'une piéce en acier mise en forme par déformation plastique à froid
EP0709481B1 (fr)	2000-01-26	Acier faiblement allié pour la fabrication de moules pour matières plastiques ou pour caoutchouc
EP0629714B1 (fr)	2000-04-12	Acier inoxydable martensitique à usinabilité améliorée
JP5503195B2 (ja)	2014-05-28	摩擦圧接に適した機械構造用鋼材およびその製造方法、摩擦圧接部品
EP0717116B1 (fr)	2001-06-13	Procédé de fabrication d'une pièce en acier de construction mécanique et pièce ainsi fabriquée
EP1051531B1 (fr)	2001-08-29	Acier et procede pour la fabrication de pieces de mecanique secables
JP5278660B2 (ja)	2013-09-04	鋼製部品の製造方法
EP2134882B1 (fr)	2019-10-30	Acier micro-allié à bonne tenue à l'hydrogène pour le formage à froid de pièces mécaniques à hautes caractéristiques
EP3274483A1 (fr)	2018-01-31	Pieces a structure bainitique a hautes proprietes de resistance et procede de fabrication
EP1426452B1 (fr)	2009-09-02	Procédé de fabrication d'une pièce en acier bainitique
JP5111014B2 (ja)	2012-12-26	高周波焼入れ軸部品用鋼及び軸部品
JPS6033338A (ja)	1985-02-20	高温浸炭用鋼
EP0845544B1 (fr)	2003-01-02	Produit sidérurgique en acier ayant une structure bainitique et procédé pour la fabrication du produit sidérurgique
US20060057419A1 (en)	2006-03-16	High-strength steel product excelling in fatigue strength and process for producing the same
FR2671106A1 (fr)	1992-07-03	Procede d'elaboration d'un acier inoxydable a structure biphasee ferrite-martensite et acier obtenu selon ce procede.
KR20180067252A (ko)	2018-06-20	응력부식 저항성이 우수한 고강도 스프링용 강선 및 그 제조방법
JP2020139185A (ja)	2020-09-03	肌焼鋼の製造方法
EP0884399B1 (fr)	2002-08-14	Procédé de fabrication d'un ressort en acier, ressort obtenu et acier pour la fabrication d'un tel ressort
EP1725689A2 (fr)	2006-11-29	Pièce mecanique de taille moyenne ou petite issue de la forge ou de la frappe
MXPA97000924A (en)	1998-10-23	Steel for the manufacture of forged pieces and manufacturing procedure of one piece forj

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