EP0216044B1 - Procédé de fabrication de bandes en acier résistant au vieillissement et apte au formage à froid - Google Patents

Procédé de fabrication de bandes en acier résistant au vieillissement et apte au formage à froid Download PDF

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Publication number
EP0216044B1
EP0216044B1 EP86109521A EP86109521A EP0216044B1 EP 0216044 B1 EP0216044 B1 EP 0216044B1 EP 86109521 A EP86109521 A EP 86109521A EP 86109521 A EP86109521 A EP 86109521A EP 0216044 B1 EP0216044 B1 EP 0216044B1
Authority
EP
European Patent Office
Prior art keywords
max
steel
rolling
cold
maximum
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.)
Expired - Lifetime
Application number
EP86109521A
Other languages
German (de)
English (en)
Other versions
EP0216044B2 (fr
EP0216044A3 (en
EP0216044A2 (fr
Inventor
Ernst Jürgen dr. Drewes
Bernhard Dr. Engl
Klaus Dieter Horn
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.)
Krupp Hoesch Stahl AG
Original Assignee
Krupp Hoesch Stahl 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6278246&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0216044(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Krupp Hoesch Stahl AG filed Critical Krupp Hoesch Stahl AG
Priority to AT86109521T priority Critical patent/ATE104362T1/de
Publication of EP0216044A2 publication Critical patent/EP0216044A2/fr
Publication of EP0216044A3 publication Critical patent/EP0216044A3/de
Publication of EP0216044B1 publication Critical patent/EP0216044B1/fr
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Publication of EP0216044B2 publication Critical patent/EP0216044B2/fr
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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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0426—Hot rolling
    • 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
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/041—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing involving a particular fabrication or treatment of ingot or slab

Definitions

  • the invention relates to a method for producing an aging-resistant steel strip with high cold formability.
  • Cold rolled steel strip is widely used for the production of cold formed products.
  • different properties characteristics (characteristic values) are required, whereby in all cases of high deformation, low yield strengths and high elongation at break values are advantageous.
  • a high strengthening exponent n m is also sought for stretch-drawing processes and for deep-drawing stress, especially when producing complicated parts, for. B. of automobile bodies, the value of the vertical anisotropy r m should also be as high as possible.
  • EP-A-108 268 describes a process for the production of cold-rolled strip with the highest deep-drawability, which contains the use of low slab preheating temperatures below 1170 ° C. as a measure, but the subject of this document is IF steel with the lowest C - held by max. 0.007% C and the need to add Ti and niobium is limited.
  • the favorable effect of the low preheating temperatures is linked to the presence of (Ti.Nb) C.
  • DE-OS 31 38 302 describes a process for producing cold-rolled high-strength steel strip from a steel which has a high phosphorus content of 0.05 to 0.10% by weight. It is proposed that the steel slabs be heated to a maximum of 1,200 ° C or in the range 1,200 to 1,000 ° C.
  • the desired tensile limits are, as Table 2 shows, over 20 kp / mm, which means that according to this state of the art the production of age-resistant steel strips with maximum cold formability has not yet been satisfactorily resolved, and this known method in particular also fulfills the wishes for exclusively Use of continuous production processes with increased economy and improved properties of the finished products, differentiated according to the respective deformation process, material stresses and characteristics not met.
  • the finish hot rolling is preferably above a 3.
  • This AI-calmed steel has a low alloy content. It was preheated in comparative example 1 as a prior art slab at 1,270 ° C. and hot-rolled in a conventional manner with a final temperature of 920 ° C. and cold-rolled and annealed and dressed in a recrystallizing manner. Examples 1 and 2 show the effects of reduced preheating and roll temperatures. The material properties for the high preheating and final roll temperatures are plotted in the left half of the fields. The mechanical properties for the variant with high preheating and final roll temperature in Example 1, ie proof strength and elongation at break, are no longer sufficient for very demanding applications. The same characteristic values are shown in the right half of the corresponding fields when the cold strip is produced according to the invention.
  • the slab was first preheated to a temperature of 1,100 ° C and then the strip was cooled between the preliminary and finishing stages, so that the strip emerged from the last finishing stand at 800 ° C.
  • the percentage decrease in thickness of the strip after passing through the transition temperature still reached 40%.
  • Cold strip produced from this hot strip despite the low alloying effort, achieved such favorable values of yield strength, elongation at break and strengthening exponent that these products can also be used for the most demanding purposes using stretch drawing and folding.
  • the characteristic value of the vertical anisotropy r m with 1.3 is not sufficient for the production of complicated deep-drawn parts.
  • the combination according to the invention of the process step mentioned leads te to the effect that cold-rolled steel strips can be produced more reliably with improved productivity and with improved cold formability specifically for certain purposes.

Claims (7)

1. Procédé pour la fabrication de feuillard d'acier résistant au vieillissement, avec une grande aptitude au formage à froid, par laminage de feuillard à chaud, laminage à froid, recuit de recristallisation et dressage ultérieur, dans lequel des aciers présentant la composition suivante (% en masse)
max. 0,06 % C
max. 0,10 % Si
max. 0,40 % Mn
max. 0,03 % P
max. 0,03 % S
max. 0,01 % N
au moins l'un des éléments du groupe suivant
0 - 0,10 % AI,
0 - 0,006 % B
impuretés dues à l'élaboration
reste fer
sont coulés en brames, chauffés avant le laminage à chaud à des températures de 1000 à maximum 1200 ° C et sont soumis à laminage de finition à chaud à une température inférieure à A3, la réduction d'épaisseur sous A3 étant au moins de 35% de l'épaisseur lors du passage de A3, mis en bobines, laminés à froid et, ensuite, soumis à un recuit de recristallisation pour atteindre une limite d'élasticité de 200N/mm2 au plus.
2. Procédé selon la revendication 1, caractérisé en ce que les aciers contiennent au maximum 0,05% de Si.
3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que les aciers contiennent au maximum 0,006% de N.
4. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'acier est chauffé avant le laminage à chaud à une température de 1150 ° C au plus et, en particulier, de 1100 ° C au plus, mais néanmoins supérieure à 1000°C.
5. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que l'acier subit un recuit de recristallisation après le laminage à froid, dans un four à passage continu pour feuillards.
6. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que l'acier est soumis à un traitement de survieillis- sement de courte durée, comportant un revenu dans la gamme des températures d'environ 250 à 450 ° C, et avant le dressage.
7. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que l'acier laminé à froid est recuit en continu et est pourvu ensuite, et en particulier tout de suite après, d'un revêtement métallique appliqué au trempé.
EP86109521A 1985-08-10 1986-07-11 Procédé de fabrication de bandes en acier résistant au vieillissement et apte au formage à froid Expired - Lifetime EP0216044B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86109521T ATE104362T1 (de) 1985-08-10 1986-07-11 Verfahren zum herstellen eines alterungsbestaendigen bandstahles mit hoher kaltumformbarkeit.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3528782 1985-08-10
DE19853528782 DE3528782A1 (de) 1985-08-10 1985-08-10 Verfahren zum herstellen eines alterungsbestaendigen bandstahles mit hoher kaltumformbarkeit

Publications (4)

Publication Number Publication Date
EP0216044A2 EP0216044A2 (fr) 1987-04-01
EP0216044A3 EP0216044A3 (en) 1989-06-14
EP0216044B1 true EP0216044B1 (fr) 1994-04-13
EP0216044B2 EP0216044B2 (fr) 1997-09-03

Family

ID=6278246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109521A Expired - Lifetime EP0216044B2 (fr) 1985-08-10 1986-07-11 Procédé de fabrication de bandes en acier résistant au vieillissement et apte au formage à froid

Country Status (3)

Country Link
EP (1) EP0216044B2 (fr)
AT (1) ATE104362T1 (fr)
DE (2) DE3528782A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0496416A1 (fr) * 1991-01-25 1992-07-29 Nkk Corporation Tôle d'acier laminée à froid revétue électrolytiquement d'un alliage de nickel, possédant une excellente aptitude du formage et à la phosphatation, ainsi que son procédé de fabrication
WO2000014288A1 (fr) * 1998-09-08 2000-03-16 Thyssen Krupp Stahl Ag Procede de production de bandes ou de toles laminees a froid

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3422612B2 (ja) * 1996-01-19 2003-06-30 Ｊｆｅスチール株式会社 極低炭素冷延鋼板の製造方法
DE19701443A1 (de) * 1997-01-17 1998-07-23 Thyssen Stahl Ag Stahl
DE19740148C1 (de) 1997-09-12 1999-07-15 Thyssenkrupp Stahl Ag Verfahren zur Herstellung von beulfesten einbrennlackierten Bauteilen aus alterungsempfindlichem Stahl
DE19834361A1 (de) * 1998-07-30 2000-02-03 Schaeffler Waelzlager Ohg Bauteil, insbesondere Wälzlager- und Motorenbauteil
DE19946889C1 (de) * 1999-09-30 2000-11-09 Thyssenkrupp Stahl Ag Verfahren zum Erzeugen von alterungsbeständigen Bändern aus einem aluminiumberuhigten Stahl
DE10020118B4 (de) * 2000-04-22 2009-11-12 Schaeffler Kg Wälzlagerbauteil
CN107099648A (zh) * 2017-06-27 2017-08-29 中国航空工业集团公司沈阳飞机设计研究所 激光沉积成形a‑100钢的组织性能均匀化热处理方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7412582A (nl) * 1974-09-24 1976-03-26 Armco Steel Corp Werkwijze voor de vervaardiging van koudgewalst en ontlaten staalplaat.
JPS5849627B2 (ja) * 1979-02-27 1983-11-05 川崎製鉄株式会社 非時交性冷延鋼板の製造方法
JPS56166330A (en) * 1980-04-25 1981-12-21 Nippon Steel Corp Manufacture of cold rolled steel plate for deep drawing by continuous annealing
JPS5857492B2 (ja) * 1980-09-25 1983-12-20 新日本製鐵株式会社 自動車用高強度冷延鋼板の製造方法
EP0072874B1 (fr) * 1981-08-25 1985-05-29 Nippon Steel Corporation Installation à double function pour la fabrication d'une tôle d'acier laminée à froid et revêtue à chaud
JPS6045689B2 (ja) * 1982-02-19 1985-10-11 川崎製鉄株式会社 プレス成形性にすぐれた冷延鋼板の製造方法
US4504326A (en) * 1982-10-08 1985-03-12 Nippon Steel Corporation Method for the production of cold rolled steel sheet having super deep drawability
US4473411A (en) * 1983-07-20 1984-09-25 Armco Inc. Process of making aluminum killed low manganese deep drawing steel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0496416A1 (fr) * 1991-01-25 1992-07-29 Nkk Corporation Tôle d'acier laminée à froid revétue électrolytiquement d'un alliage de nickel, possédant une excellente aptitude du formage et à la phosphatation, ainsi que son procédé de fabrication
US5336567A (en) * 1991-01-25 1994-08-09 Nkk Corporation Nickel alloy electroplated cold-rolled steel sheet excellent in press-formability and phosphating-treatability
US5456816A (en) * 1991-01-25 1995-10-10 Nkk Corporation Nickel alloy electroplated cold-rolled steel sheet excellent in press-formability and phosphating-treatability and method for manufacturing same
WO2000014288A1 (fr) * 1998-09-08 2000-03-16 Thyssen Krupp Stahl Ag Procede de production de bandes ou de toles laminees a froid
AU749783B2 (en) * 1998-09-08 2002-07-04 Thyssen Krupp Stahl Ag Method for producing cold-rolled bands or sheets
US6582537B1 (en) 1998-09-08 2003-06-24 Thyssen Krupp Stahl Ag Method for producing cold-rolled bands or sheets

Also Published As

Publication number Publication date
EP0216044B2 (fr) 1997-09-03
DE3528782A1 (de) 1987-02-19
DE3689781D1 (de) 1994-05-19
EP0216044A3 (en) 1989-06-14
ATE104362T1 (de) 1994-04-15
DE3528782C2 (fr) 1990-06-13
EP0216044A2 (fr) 1987-04-01

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