EP0910675B1 - Feuillard acier lamine a chaud et son procede de fabrication - Google Patents
Feuillard acier lamine a chaud et son procede de fabrication Download PDFInfo
- Publication number
- EP0910675B1 EP0910675B1 EP97931775A EP97931775A EP0910675B1 EP 0910675 B1 EP0910675 B1 EP 0910675B1 EP 97931775 A EP97931775 A EP 97931775A EP 97931775 A EP97931775 A EP 97931775A EP 0910675 B1 EP0910675 B1 EP 0910675B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hot
- less
- rolled strip
- steel
- temperature
- 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
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
-
- 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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D2211/008—Martensite
Definitions
- the invention relates to a hot strip which is at most 5 mm thick made of high strength steel and a process for its Production.
- Hot strip means hot rolled Tape.
- hot strip is only manufactured up to strengths of around 800 N / mm 2 . These are thermomechanically rolled micro-alloyed steels. For applications that require additional strengths, soft hot strip is used and the strength required on the component is set by a subsequent heat treatment. For the thickness range below 2.0 mm, additional cold rolling is usually required to set the desired thickness. The required strength is also set in this case by a suitable heat treatment.
- From GB 2 195 658 A1 are forgings from one Steel with 0.01 to 0.20% C, up to 1.0% Si, 0.5 to 2.25% Mn, up to 1.5% Cr, up to 0.05% Ti, up to 0.10% Nb, 0.005 to 0.015% N and up to 0.06% A1 are known.
- the cooling of the Steel from the austenite area is to be controlled that the structure is fully martensitic. Be revealed however only examples with carbon contents below 0.10% and silicon contents over 0.17%. The Sulfur contents are relatively high at over 0.01%.
- the hot strip has after a broken cooling a dual-phase structure made of polygonal ferrite and one Mixture of pearlite and bainite.
- the hot strip known from DE 30 07 560 A1 is also used after hot rolling at a cooling rate cooled from 1 K / s or faster to a dual phase structure to produce from ferrite and martensite.
- a cooling rate cooled from 1 K / s or faster to a dual phase structure to produce from ferrite and martensite.
- Respect for satisfactory ductility and Weldability properties are carbon content in the Range of 0.02 to 0.09% recommended.
- the preferred Silicon content is relatively high at 1.0%.
- EP 0 492 623 A1 describes a steel made from a silicon-calmed steel Hot strip known, the Si contents of 0.1 wt .-% and more and has a martensite content of 60 - 100%.
- the known Hot strip is used for the production of welded steel pipe without that special emphasis is placed on a good surface quality becomes. Lowering the Si content below a lower limit of 0.03 % By weight is advised against on the grounds that lower ones Si content no longer has the properties of the known hot strip let achieve.
- the invention has for its object to produce a hot strip with tensile strength values over 800 N / mm 2 and at the same time good cold formability in the thickness range ⁇ 5 mm. This would mean an expansion of the direct use of hot strip for cold forming purposes, such as cold pressing, with clear economic advantages that result from the elimination of cold rolling and heat treatment.
- Carbon can preferably be from 0.08 to 0.15%, manganese from 1.75 to 1.90%, chromium from 0.5 to 0.6% and Nitrogen from 0.005 to 0.009% may be included.
- the tensile strength of the hot strip is preferably set to a value in the range from 800 to 1400 N / mm 2 by appropriate selection of the reel temperature within the aforementioned temperature range.
- the hot strip can be hot-dip galvanized to to become more corrosion resistant.
- Well cold-formable high-strength galvanized sheets are preferred for mechanically highly stressed components in automotive engineering used, e.g. for side impact beams and bumpers.
- the steel according to the invention achieves high strength without expensive alloying elements and without annealing like this is the case with known steels.
- a steel with 0.15% C, 0.01% Si, 1.77% Mn, 0.014% P, 0.003% S, 0.028% Al, 0.0043% N, 0.526% Cr, 0.017% Cu, 0.003% Mo, 0.027% Ni, balance Fe became to shed a slab.
- the slab was reduced to approx. 1250 ° C warmed up, at approx. Pre-rolled at 1120 ° C and at 840 ° C Final temperature rolled to a final thickness of 2 mm, then cooled and coiled at 50 ° C. This creates a Structure with more than 95% martensite.
- the yield strength reached values of 1120 N / mm 2 and the tensile strength values of 1350 N / mm 2 with elongation values A 50 to 11.1%.
- Example 2 A steel with the same analysis as in Example 1 was processed into 3.5 mm thick hot strip. The data are given in Table 1. The strength values are significantly higher when reeling instead of over 400 ° C to 95 ° C. sample Final rolling temperature ° C Reel temperature ° C Rp0.2 N / mm 2 rm N / mm 2 1 845 95 940 1243 2 845 95 997 1305 3 845 95 983 1199 4 * 850 420 742 803 5 * 850 420 691 793 6 * 850 420 641 741 7 845 95 916 1089 8th 845 95 1037 1293 9 845 95 1073 1328 10 * 835 455 672 768 11 * 835 455 643 760 12 * 835 455 676 778
- the hot strip can be hot-dip galvanized into the final shape before cold forming. Through the heat treatment cycle at. The martensite is left galvanized. Starting from a hot strip with tensile strengths in the range of 1200 - 1400 N / mm 2 , depending on the heat treatment cycle, tensile strengths between 800 and 1100 N / mm 2 are established during galvanizing.
- a 2.0 and 1.6 mm thick hot strip was galvanized.
- the following table 2 compares the properties in the rolled state and after galvanizing: rolled condition after galvanizing thickness re rm A80 re rm A80 mm N / mm 2 % N / mm 2 % 1.6 1052 1393 5.7 1065 1095 7 1.6 1048 1387 7.6 1040 1082 5.5 2.0 1098 1361 6.6 1058 1082 5.9
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 Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Coating With Molten Metal (AREA)
- Meat, Egg Or Seafood Products (AREA)
Claims (8)
- Feuillard à chaud avec une épaisseur inférieure à 5 mm, en particulier inférieure à 2 mm, qui possède une résistance à la traction comprise entre 800 et 1400 N/mm2,
réalisé en un acier qui contient (en pourcentage en masse)
entre 0,08 et 0,25 % de carbone,
entre 1,20 et 2,0 % de manganèse,
entre 0,02 et 0,05 % d'aluminium,
moins de 0,04 % de silicium,
ainsi qu'un ou plusieurs des éléments suivants au choix : chrome, cuivre, molybdène, nickel, azote, titane et bore avec les teneurs ci-dessous :jusqu'à 1,0 % de chrome,jusqu'à 0,1% de cuivre,jusqu'à 0,5 % de molybdène,jusqu'à 0,1 % de nickel,jusqu'à 0,009 % d'azote,
jusqu'à 0,0025 % de B
et pour le reste, du fer et des impuretés inévitables incluant jusqu'à 0,015 % de phosphore et jusqu'à 0,003 % de soufre,
et qui présente une structure martensitique avec, au total, moins de 5 % d'autres constituants structuraux. - Feuillard à chaud selon la revendication 1, caractérisé en ce que l'acier contient entre 0,12 et 0,2 % de carbone.
- Feuillard à chaud selon l'une quelconque des revendications précédentes, caractérisé en ce que (en pourcentage en masse) la teneur en carbone est comprise entre 0,08 et 0,15 %, la teneur en manganèse entre 1,75 et 1,90 %, la teneur en chrome entre 0,5 et 0,6 % et la teneur en azote entre 0,005 et 0,009 %.
- Feuillard à chaud selon l'une des revendications 1 à 3, caractérisé en ce qu'il est galvanisé à chaud.
- Procédé de fabrication de feuillards à chaud d'une épaisseur finale inférieure à 5 mm, en particulier inférieure à 2 mm, réalisé en un acier de la composition selon l'une des revendications 1 à 3, avec des valeurs de résistance à la traction supérieures à 800 N/mm2,
caractérisé par les actions suivantes :une brame est portée à une température comprise entre 1000 et 1300°C,dégrossie dans la plage de température comprise entre 950 et 1150°C,finie au laminoir à une température de fin de laminage supérieure à Ar3,le feuillard à chaud ainsi produit est refroidi et bobiné pour atteindre une température de bobinage dans la plage de 20°C jusqu'à en dessous de la température de départ de la martensite, grâce à quoi une structure avec plus de 95 % de martensite est obtenue. - Procédé selon la revendication 5, caractérisé en ce que le refroidissement pour passer de la température de laminoir finisseur à la température de bobinage se fait avec t 8/5 inférieur à 10 s.
- Procédé selon la revendication 5 ou 6, caractérisé en ce que la résistance à la traction du feuillard à chaud est fixée à une valeur comprise entre 800 et 1400 N/mm2 par la sélection correspondante de la température de bobinage à l'intérieur de la plage de température mentionnée à la revendication 5.
- Application du feuillard à chaud galvanisé à chaud, constitué selon l'une des revendications 1 à 3 et fabriqué selon un procédé développé selon les revendications 5 à 7 pour les pièces mécaniques fortement sollicitées dans la construction automobile, par exemple des poutres de protection latérale et des boucliers.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19628135 | 1996-07-12 | ||
DE19628135 | 1996-07-12 | ||
DE19719546 | 1997-05-09 | ||
DE19719546A DE19719546C2 (de) | 1996-07-12 | 1997-05-09 | Warmband aus Stahl und Verfahren zu seiner Herstellung |
PCT/EP1997/003541 WO1998002589A1 (fr) | 1996-07-12 | 1997-07-04 | Feuillard acier lamine a chaud et son procede de fabrication |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0910675A1 EP0910675A1 (fr) | 1999-04-28 |
EP0910675B1 true EP0910675B1 (fr) | 2004-10-06 |
Family
ID=26027441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97931775A Expired - Lifetime EP0910675B1 (fr) | 1996-07-12 | 1997-07-04 | Feuillard acier lamine a chaud et son procede de fabrication |
Country Status (12)
Country | Link |
---|---|
US (1) | US6284063B1 (fr) |
EP (1) | EP0910675B1 (fr) |
CN (1) | CN1089811C (fr) |
AT (1) | ATE278811T1 (fr) |
BR (1) | BR9710285A (fr) |
CA (1) | CA2260231A1 (fr) |
CZ (1) | CZ6999A3 (fr) |
ES (1) | ES2230613T3 (fr) |
HU (1) | HU220900B1 (fr) |
PL (1) | PL185228B1 (fr) |
TR (1) | TR199900053T2 (fr) |
WO (1) | WO1998002589A1 (fr) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5393617A (en) * | 1993-10-08 | 1995-02-28 | Electro Energy, Inc. | Bipolar electrochmeical battery of stacked wafer cells |
US6312536B1 (en) * | 1999-05-28 | 2001-11-06 | Kabushiki Kaisha Kobe Seiko Sho | Hot-dip galvanized steel sheet and production thereof |
FI114484B (fi) * | 2002-06-19 | 2004-10-29 | Rautaruukki Oyj | Kuumavalssattu nauhateräs ja sen valmistusmenetelmä |
CN1318630C (zh) * | 2004-04-13 | 2007-05-30 | 王洪珂 | 高强度包装钢带及其制造工艺 |
CN100439543C (zh) * | 2006-03-24 | 2008-12-03 | 宝山钢铁股份有限公司 | 热轧超高强度马氏体钢及其制造方法 |
US7846275B2 (en) * | 2006-05-24 | 2010-12-07 | Kobe Steel, Ltd. | High strength hot rolled steel sheet having excellent stretch flangeability and its production method |
PL1918402T3 (pl) * | 2006-10-30 | 2009-10-30 | Thyssenkrupp Steel Ag | Sposób wytwarzania płaskich produktów stalowych ze stali tworzącej strukturę o fazach złożonych |
ES2325962T3 (es) * | 2006-10-30 | 2009-09-25 | Thyssenkrupp Steel Ag | Procedimiento para fabricar productos planos de acero a partir de un acero multifasico microaleado con boro. |
PL1918403T3 (pl) * | 2006-10-30 | 2009-10-30 | Thyssenkrupp Steel Ag | Sposób wytwarzania płaskich produktów stalowych ze stali tworzącej strukturę martenzytyczną |
ATE432375T1 (de) * | 2006-10-30 | 2009-06-15 | Thyssenkrupp Steel Ag | Verfahren zum herstellen von stahl-flachprodukten aus einem mit silizium legierten mehrphasenstahl |
ATE432374T1 (de) * | 2006-10-30 | 2009-06-15 | Thyssenkrupp Steel Ag | Verfahren zum herstellen von stahl-flachprodukten aus einem mit aluminium legierten mehrphasenstahl |
CN101781735B (zh) * | 2009-01-16 | 2011-04-13 | 宝山钢铁股份有限公司 | 抗拉强度≥1000MPa的经济性高强度捆带钢及其制造方法 |
CN102328191B (zh) * | 2011-10-19 | 2013-08-28 | 无锡市锡州冷拉型钢有限公司 | 一种c型槽钢的生产工艺 |
UA113529C2 (xx) * | 2011-11-28 | 2017-02-10 | Мартенситні сталі з міцністю при розтягуванні 1700-2200 мпа | |
CN102864377B (zh) * | 2012-09-10 | 2015-05-20 | 山西太钢不锈钢股份有限公司 | 一种热轧带钢及其制造方法 |
DE112015005690T8 (de) | 2014-12-19 | 2018-04-19 | Nucor Corporation | Warmgewalztes martensitisches Leichtbau-Stahlblech und Verfahren zum Herstellen desselben |
WO2020002285A1 (fr) * | 2018-06-26 | 2020-01-02 | Tata Steel Nederland Technology B.V. | Acier martensitique laminé à froid à haute résistance et haute aptitude au cintrage et son procédé de production |
KR102209552B1 (ko) * | 2018-12-19 | 2021-01-28 | 주식회사 포스코 | 구멍확장성이 우수한 고강도 열연강판 및 그 제조방법 |
EP4324576A3 (fr) * | 2019-02-08 | 2024-05-22 | Nucor Corporation | Acier résistant aux intempéries à ultra-haute résistance et laminage à frottement élevé de celui-ci |
CN112522580A (zh) * | 2019-09-19 | 2021-03-19 | 宝山钢铁股份有限公司 | 一种马氏体钢带及其制造方法 |
KR102404770B1 (ko) * | 2019-12-20 | 2022-06-07 | 주식회사 포스코 | 항복비가 우수한 고강도 열연강판 및 그 제조방법 |
CN113308648B (zh) * | 2021-05-14 | 2022-11-15 | 唐山钢铁集团高强汽车板有限公司 | 一种冷轧马氏体钢基板及其生产方法 |
CN113528932A (zh) * | 2021-05-31 | 2021-10-22 | 唐山钢铁集团高强汽车板有限公司 | 一种马氏体钢板及其制备方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU527097B2 (en) | 1979-01-12 | 1983-02-17 | Nippon Steel Corporation | Artifically aged low yield to tensile strength ratio high strength steel sheet |
JPS55131168A (en) * | 1979-03-30 | 1980-10-11 | Sumitomo Metal Ind Ltd | Manufacture of high tensile alloyed zinc-plated steel sheet |
DE3007560A1 (de) | 1980-02-28 | 1981-09-03 | Kawasaki Steel Corp., Kobe, Hyogo | Verfahren zum herstellen von warmgewalztem blech mit niedriger streckspannung, hoher zugfestigkeit und ausgezeichnetem formaenderungsvermoegen |
JPS5719322A (en) * | 1980-07-08 | 1982-02-01 | Nippon Steel Corp | Improvement of sulfide stress corrosion cracking of low alloy steel |
US4406713A (en) | 1981-03-20 | 1983-09-27 | Kabushiki Kaisha Kobe Seiko Sho | Method of making high-strength, high-toughness steel with good workability |
JPS58136716A (ja) | 1982-01-28 | 1983-08-13 | Nippon Steel Corp | 加工用強高度低降伏比複合組織熱延鋼板の製造方法 |
US4830686A (en) * | 1984-04-12 | 1989-05-16 | Kawasaki Steel Corporation | Low yield ratio high-strength annealed steel sheet having good ductility and resistance to secondary cold-work embrittlement |
DE3440752A1 (de) | 1984-11-08 | 1986-05-22 | Thyssen Stahl AG, 4100 Duisburg | Verfahren zur herstellung von warmband mit zweiphasen-gefuege |
GB8621903D0 (en) | 1986-09-11 | 1986-10-15 | British Steel Corp | Production of steel |
JP2627164B2 (ja) | 1988-02-03 | 1997-07-02 | 新日本製鐵株式会社 | 耐亜鉛めっき割れ性に優れた溶接構造物の製造方法 |
JP2546070B2 (ja) | 1990-12-25 | 1996-10-23 | 日本鋼管株式会社 | 車輛用ドアインパクトバー用高強度電縫鋼管およびその製造方法 |
JP3061218B2 (ja) * | 1991-12-26 | 2000-07-10 | 株式会社神戸製鋼所 | 高張力熱間圧延鋼板の製造方法 |
WO1996023083A1 (fr) * | 1995-01-26 | 1996-08-01 | Nippon Steel Corporation | Acier soudable de haute resistance ayant une durete excellente a basse temperature |
-
1997
- 1997-07-04 CZ CZ9969A patent/CZ6999A3/cs unknown
- 1997-07-04 BR BR9710285A patent/BR9710285A/pt not_active IP Right Cessation
- 1997-07-04 CA CA002260231A patent/CA2260231A1/fr not_active Abandoned
- 1997-07-04 PL PL97331212A patent/PL185228B1/pl unknown
- 1997-07-04 US US09/214,480 patent/US6284063B1/en not_active Expired - Lifetime
- 1997-07-04 EP EP97931775A patent/EP0910675B1/fr not_active Expired - Lifetime
- 1997-07-04 AT AT97931775T patent/ATE278811T1/de not_active IP Right Cessation
- 1997-07-04 ES ES97931775T patent/ES2230613T3/es not_active Expired - Lifetime
- 1997-07-04 WO PCT/EP1997/003541 patent/WO1998002589A1/fr active IP Right Grant
- 1997-07-04 CN CN97196345A patent/CN1089811C/zh not_active Expired - Lifetime
- 1997-07-04 TR TR1999/00053T patent/TR199900053T2/xx unknown
- 1997-07-04 HU HU9903306A patent/HU220900B1/hu not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CZ6999A3 (cs) | 1999-10-13 |
CA2260231A1 (fr) | 1998-01-22 |
ATE278811T1 (de) | 2004-10-15 |
WO1998002589A1 (fr) | 1998-01-22 |
PL331212A1 (en) | 1999-07-05 |
CN1089811C (zh) | 2002-08-28 |
HUP9903306A2 (hu) | 2000-02-28 |
CN1225141A (zh) | 1999-08-04 |
PL185228B1 (pl) | 2003-04-30 |
EP0910675A1 (fr) | 1999-04-28 |
ES2230613T3 (es) | 2005-05-01 |
US6284063B1 (en) | 2001-09-04 |
HU220900B1 (en) | 2002-06-29 |
HUP9903306A3 (en) | 2000-05-29 |
TR199900053T2 (xx) | 1999-03-22 |
BR9710285A (pt) | 1999-08-17 |
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