EP1561833B1 - Acier pour la fabrication d'éléments à haute résistance mécanique et excellente ténacité aux basses températures et son utilisation - Google Patents

Acier pour la fabrication d'éléments à haute résistance mécanique et excellente ténacité aux basses températures et son utilisation Download PDF

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Publication number
EP1561833B1
EP1561833B1 EP04002612A EP04002612A EP1561833B1 EP 1561833 B1 EP1561833 B1 EP 1561833B1 EP 04002612 A EP04002612 A EP 04002612A EP 04002612 A EP04002612 A EP 04002612A EP 1561833 B1 EP1561833 B1 EP 1561833B1
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EP
European Patent Office
Prior art keywords
weight
steel
use according
content
components
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
EP04002612A
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German (de)
English (en)
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EP1561833A1 (fr
Inventor
Agnes Dipl.-Ing. Bauk
Rolf Dr.-Ing. Sinz
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.)
Deutsche Edelstahlwerke En Rud Ketten Rieger GmbH
Original Assignee
RUD Kettenfabrik Rieger und Dietz GmbH and Co KG
Edelstahlwerke Suedwestfalen GmbH
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
Priority to EP04002612A priority Critical patent/EP1561833B1/fr
Application filed by RUD Kettenfabrik Rieger und Dietz GmbH and Co KG, Edelstahlwerke Suedwestfalen GmbH filed Critical RUD Kettenfabrik Rieger und Dietz GmbH and Co KG
Priority to DE502004003457T priority patent/DE502004003457D1/de
Priority to ES04002612T priority patent/ES2286518T3/es
Priority to DK04002612T priority patent/DK1561833T3/da
Priority to DE200420021326 priority patent/DE202004021326U1/de
Priority to AT04002612T priority patent/ATE359382T1/de
Priority to JP2006551811A priority patent/JP2007520633A/ja
Priority to US10/551,506 priority patent/US20070107808A1/en
Priority to CN200580000079.7A priority patent/CN1764734B/zh
Priority to PCT/EP2005/001163 priority patent/WO2005075693A1/fr
Priority to BRPI0503588-0B1A priority patent/BRPI0503588B1/pt
Publication of EP1561833A1 publication Critical patent/EP1561833A1/fr
Priority to ZA200507292A priority patent/ZA200507292B/xx
Application granted granted Critical
Publication of EP1561833B1 publication Critical patent/EP1561833B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten

Definitions

  • the invention relates to a steel for the production of high-strength components with outstanding low-temperature toughness.
  • Such steels are used for example for the production of stop or lashing, as they are needed for the attachment and securing of loads.
  • these steels are processed into hot-rolled bar steel, wire rod or bright steel, from which welded round steel chains are then made.
  • the stainless steels 23 MnNiCrMo 5 3 and 23 MnNiCrMo 5 which are known for this purpose and are specified in DIN 17 115, each have (in% by weight) 0.20-0.26% C, ⁇ 0.25% Si, 1, 10-1.40% Mn, each 0.020% P and S, the sum of the contents of P and S not exceeding 0.035%, if necessary 0.020-0.050% Al, up to 0.014% N and 0.40-0.60% Cr.
  • the steel 23 MnNiCrMo 5 2 is additionally supplemented with 0.20-0.30% Mo and 0.70-0.90% Ni, while the steel 23 MnNiCrMo 5 4 additionally has 0.50-0.60% Mo and 0.90 - contains 1.10% Ni.
  • the object of the invention was therefore to provide a high-strength steel, which still has an excellent toughness even at low temperatures, so that the risk of breakage of each of the steel component produced is reduced to a minimum, even under unfavorable, harsh operating conditions.
  • advantageous uses of this steel are to be specified.
  • steel according to the invention for the production of high-strength components with outstanding low-temperature toughness has the following composition (in% by weight): C: 0.08 - 0.25%, Si: 0.10 - 0.30%, Mn: 0.80 - 1.60%, P: ⁇ 0.020%, S: ⁇ 0.015%, where the sum of P and S content is ⁇ 0.030%, Cr: 0.40 - 0.80%, Not a word: 0.30 - 0.50%, Ni: 0.70 - 1.20%, al: 0.020-0.060%, N: 0.007-0.018%, V: ⁇ 0.15%, Nb: ⁇ 0.07%, where the sum of V and Nb content is ⁇ 0.020%, Remaining iron and unavoidable impurities.
  • the individual alloy components are selected such that a property profile which optimally meets the requirements is achieved.
  • This is achieved by the inventively predetermined contents of Cr, Ni and N and the minimum sum of the contents of Nb and V.
  • inventive Steel good cold forming and has high strength in the finished state.
  • it is characterized by a high notched impact strength and such a low brittle fracture transition temperature that it comes only at temperatures for brittle fracture, which are substantially lower than the brittle fracture temperature of known from the prior art steels.
  • the C contents lying in the range from 0.08 to 0.25% by weight ensure the good low-temperature resistance of steels according to the invention. Particularly positive results are obtained in this context if the C content is 0.16-0.23% by weight.
  • the good through-hardenability and tempering resistance of the steel according to the invention is achieved .
  • the safety with which this combined effect is achieved can be increased by increasing the Cr content to 0.40-0.65% by weight and the Mo contents to 0.35-0.50% by weight. % can be set.
  • steel according to the invention in the sum contains at least 0.02 wt .-% Nb and V and at the same time the contents of V to max. 0.15 wt .-% and Nb to max. 0.07 wt .-% are limited, ensuring that the desired fine grain structure is still preserved even at higher temperatures.
  • V is not present in the steel according to the invention or only as an unavoidable impurity.
  • finished steel according to the invention regularly has an austenite grain size finer than ASTM 10.
  • the fineness of the structure of the invention steel is thus substantially larger than that of known steels, for which according to DIN 17 115 an austenite grain size of ASTM 5 is required.
  • the invention thus provides a steel which still has excellent toughness even at low temperatures. Due to the favorable combination of its properties, the risk of breakage of a component produced from inventive steel is reduced to a minimum even under unfavorable, harsh operating conditions.
  • Steel according to the invention is preferably processed into rolled steel.
  • the aim of the processing is to preserve the finest possible fine-grained structure of the steel according to the invention via each of the processing steps. This includes not only the process steps performed during heating and rolling, but also the annealing treatments that occur and performed after deformation to the component.
  • the heating and rolling conditions are selected such that, despite onset of diffusion processes during heating, high rolling temperatures are avoided in order to suppress the formation of coarse grain.
  • the temperatures during further forming are also selected by a controlled withdrawal of energy during hot forming so that the desired microstructure is obtained with its fine-grained structure.
  • steel according to the invention is particularly suitable for the production of high-strength components by cold forming with subsequent tempering.
  • These components may be, for example, means for carrying, pulling, lifting, conveying or securing loads associated with the highest strength class.
  • Such summarized under the preamble stop and lashing items include, for example, attachment points, hooks, brackets, loops, chains, joints, swirl elements, rockers, struts, spindle and ratchet tensioner, load blocks and the like.
  • inventive steel means for connecting components with excellent performance properties are, for example, bolts or other connection or force transmission elements, such as screws, clamps, rods or the like.
  • Chains produced according to the invention can safely withstand high loads even in great cold, without the risk of breakage or comparable damage occurring.
  • round steel chains, in particular welded round steel chains can be produced which are able to cope with the highest demands.
  • the components made of steel according to the invention regularly have a strength of at least 1200 MPa, in particular more than 1550 MPa, 1600 MPa or 1650 MPa. It should be emphasized in this context that, with a strength of at least 1550 MPa, the brittle fracture transition temperature FATT of the components made from steel according to the invention is regularly at most - 60 ° C. This limit temperature is significantly lower than in known steels.
  • the notch impact value is regularly more than 45 J and the respective component has a technical crack initiation toughness J IC of more than 170 N / mm at -60 ° C., in particular more than 185 N / mm.
  • the crack initiation toughness J IC is one in the ASTM 1820 defined value, which allows an assessment of the ductile fracture tendency of a steel material.
  • the high toughness of the steel according to the invention is also noticeable in that the components produced from such steel regularly have an elongation at break of more than 28%.
  • the rolled steel After hot rolling and a long-term heat treatment, which was done to set a favorable for the subsequent cold working strength, the rolled steel has been formed into chain links, which have been closed after assembly of the chain by welding.
  • the chains produced in this way had a fine grain structure of ASTM 11, a strength of 1270 N / mm 2 and a brittle fracture transition temperature FATT of -70 ° C determined at this strength. Its impact value was 557 J at -60 ° C test temperature and the elongation at break was 28%.

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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)
  • Heat Treatment Of Articles (AREA)

Claims (23)

  1. Acier destiné à fabriquer des éléments à haute résistance mécanique et excellente ténacité à basse température, lequel acier présente la composition suivante (en % en poids): C: 0, 08 - 0,25 %, Si: 0,10 - 0,30 %, Mn: 0,80 - 1,60 %, P: ≤ 0,020 %, S: ≤ 0,015 %,
    la somme des teneurs en P et en S étant ≤ 0,030 %, Cr: 0,40 - 0,80 %, Mo: 0,30 - 0,50 %, Ni: 0,70 - 1,20 %; Al: 0,020 - 0,060 %, N: 0,007 - 0,018 %, V: ≤ 0,15 %, Nb: ≤ 0,07 %,
    la somme des teneurs en V et en Nb étant ≥ 0,020 %, le solde étant du fer et les impuretés inévitables.
  2. Acier selon la revendication 1, caractérisé en ce que sa teneur en C est comprise entre 0,16 % en poids et 0,23 % en poids.
  3. Acier selon l'une des revendications précédentes, caractérisé en ce que sa teneur en Mn est comprise entre 1,00 % en poids et 1,35 % en poids.
  4. Acier selon l'une des revendications précédentes, caractérisé en ce que sa teneur en Cr est comprise entre 0,40 % en poids et 0,65 % en poids.
  5. Acier selon l'une des revendications précédentes, caractérisé en ce que sa teneur en Mo est comprise entre 0,35 % en poids et 0,50 % en poids.
  6. Acier selon l'une des revendications précédentes, caractérisé en ce que sa teneur en Ni est comprise entre 0,75 % en poids et 1,00 % en poids.
  7. Acier selon l'une des revendications précédentes, caractérisé en ce que sa teneur en Al est comprise entre 0,020 % en poids et 0,045 % en poids.
  8. Acier selon l'une des revendications précédentes, caractérisé en ce que sa teneur en N est comprise entre 0,007 % en poids et 0,015 % en poids.
  9. Acier selon l'une des revendications précédentes, caractérisé en ce qu'il présente une granulométrie austénitique plus fine que celle d'un acier ASTM 10.
  10. Utilisation d'un acier qui présente une composition selon l'une des revendications précédentes, pour la fabrication d'éléments à haute résistance mécanique, par déformation à froid et ensuite revenu.
  11. Utilisation selon la revendication 10, caractérisée en ce que les éléments sont des moyens pour porter, tirer, lever, transporter ou fixer des charges.
  12. Utilisation selon la revendication 10, caractérisée en ce que les éléments sont des moyens de liaison de composants de construction.
  13. utilisation selon l'une des revendications 10 à 12, caractérisée en ce que les éléments sont des chaînes.
  14. Utilisation selon la revendication 13, caractérisée en ce que les chaînes sont des chaînes en acier rond.
  15. Utilisation selon les revendications 13 ou 14, caractérisée en ce que les chaînes sont soudées.
  16. Utilisation selon l'une des revendications 10 à 15, caractérisée en ce que les éléments ont une résistance mécanique d'au moins 1 200 MPa.
  17. Utilisation selon la revendication 16, caractérisée en ce que la résistance mécanique est d'au moins 1 550 MPa.
  18. Utilisation selon les revendications 16 ou 17, caractérisée en ce que la résistance mécanique est d'au moins 1 600 MPa et en particulier d'au moins 1 650 MPa.
  19. Utilisation selon l'une des revendications 10 à 18, caractérisée en ce que pour une résistance mécanique d'au moins 1 550 MPa, la température de transition de rupture fragile FATT des éléments est d'au plus -60° C.
  20. Utilisation selon l'une des revendications 10 à 19, caractérisée en ce que le travail de percussion sur éprouvette entaillée est supérieur à 45 J.
  21. Utilisation selon l'une des revendications 10 à 20, caractérisée en ce que le matériau de l'élément présente une ténacité technique à l'amorçage des fissures JIC supérieure à 170 N/mm2.
  22. Utilisation selon la revendication 21, caractérisée en ce que le matériau de l'élément présente une ténacité technique à l'amorçage des fissures JIC supérieure à 185 N/mm2.
  23. Utilisation selon l'une des revendications 10 à 22, caractérisée en ce que les éléments ont un allongement à la rupture supérieur à 28 %.
EP04002612A 2004-02-05 2004-02-05 Acier pour la fabrication d'éléments à haute résistance mécanique et excellente ténacité aux basses températures et son utilisation Expired - Lifetime EP1561833B1 (fr)

Priority Applications (12)

Application Number Priority Date Filing Date Title
DE502004003457T DE502004003457D1 (de) 2004-02-05 2004-02-05 Stahl zur Herstellung von hochfesten Bauteilen mit herausragender Tieftemperaturzähigkeit und Verwendungen eines solchen Stahls
ES04002612T ES2286518T3 (es) 2004-02-05 2004-02-05 Acero para la fabricacion de componentes altamente resistentes con sobresaliente tenacidad a bajas temperaturas y usos de un acero de este tipo.
DK04002612T DK1561833T3 (da) 2004-02-05 2004-02-05 Stål til fremstilling af höjstyrkekomponenter med fremragende lavtemperatursejhed samt anvendelser af et sådant stål
DE200420021326 DE202004021326U1 (de) 2004-02-05 2004-02-05 Stahl zur Herstellung von hochfesten Bauteilen mit herausragender Tieftemperaturzähigkeit und Verwendungen eines solchen Stahls
AT04002612T ATE359382T1 (de) 2004-02-05 2004-02-05 Stahl zur herstellung von hochfesten bauteilen mit herausragender tieftemperaturzähigkeit und verwendungen eines solchen stahls
EP04002612A EP1561833B1 (fr) 2004-02-05 2004-02-05 Acier pour la fabrication d'éléments à haute résistance mécanique et excellente ténacité aux basses températures et son utilisation
JP2006551811A JP2007520633A (ja) 2004-02-05 2005-02-04 優れた低温じん性を有する高強度部品を製造するための鋼及び前記タイプの鋼の使用
US10/551,506 US20070107808A1 (en) 2004-02-05 2005-02-04 Steel for production of high-strength components with excellent low-temperature toughness and uses of a steel of this type
CN200580000079.7A CN1764734B (zh) 2004-02-05 2005-02-04 生产具有良好的低温韧性的高强度部件用钢以及这种类型钢的使用
PCT/EP2005/001163 WO2005075693A1 (fr) 2004-02-05 2005-02-04 Acier pour la fabrication de composants hautement resistants ayant une tenacite basse temperature superieure, et utilisations d'un tel acier
BRPI0503588-0B1A BRPI0503588B1 (pt) 2004-02-05 2005-02-04 aÇo para produÇço de componentes de alta resistÊncia com excelente tenacidade em baixa temperatura e componentes de aÇo
ZA200507292A ZA200507292B (en) 2004-02-05 2005-09-09 Steel for producing high tensile structural components with excellent toughness at low temperatures and uses of such a steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04002612A EP1561833B1 (fr) 2004-02-05 2004-02-05 Acier pour la fabrication d'éléments à haute résistance mécanique et excellente ténacité aux basses températures et son utilisation

Publications (2)

Publication Number Publication Date
EP1561833A1 EP1561833A1 (fr) 2005-08-10
EP1561833B1 true EP1561833B1 (fr) 2007-04-11

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EP04002612A Expired - Lifetime EP1561833B1 (fr) 2004-02-05 2004-02-05 Acier pour la fabrication d'éléments à haute résistance mécanique et excellente ténacité aux basses températures et son utilisation

Country Status (11)

Country Link
US (1) US20070107808A1 (fr)
EP (1) EP1561833B1 (fr)
JP (1) JP2007520633A (fr)
CN (1) CN1764734B (fr)
AT (1) ATE359382T1 (fr)
BR (1) BRPI0503588B1 (fr)
DE (1) DE502004003457D1 (fr)
DK (1) DK1561833T3 (fr)
ES (1) ES2286518T3 (fr)
WO (1) WO2005075693A1 (fr)
ZA (1) ZA200507292B (fr)

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DE102005034140A1 (de) * 2005-07-19 2007-01-25 Rud-Kettenfabrik Rieger & Dietz Gmbh U. Co. Hochfeste Stahlkette für den Tieftemperaturbereich
CN101407893B (zh) * 2008-11-25 2011-04-06 武汉钢铁(集团)公司 一种高强度大线能量焊接耐火抗震建筑用钢及其生产方法
DE102011054840A1 (de) * 2011-10-26 2013-05-02 Rud Ketten Rieger & Dietz Gmbh U. Co. Kg Härtbarer Stahl für Hebe-, Anschlag-, Spann- und/oder Zurrmittel der Güteklasse 8 und darüber, Bauelement der Hebe-, Anschlag-, Spann- und/oder Zurrtechnik sowie Verfahren zur Herstellung eines solchen Bauelements
CN103451529B (zh) * 2013-08-23 2015-09-16 苏州长盛机电有限公司 一种铝钛铁合金材料
CN104532143B (zh) * 2014-12-22 2016-11-16 江阴兴澄特种钢铁有限公司 一种矿用大规格、高强度链条钢及其制备方法
WO2017141424A1 (fr) * 2016-02-19 2017-08-24 新日鐵住金株式会社 Acier
CN108603259B (zh) * 2016-02-19 2020-11-06 日本制铁株式会社 在淬火回火后具有高强度且低温韧性优异的钢
US10947610B2 (en) 2018-08-21 2021-03-16 Exxonmobil Upstream Research Company Mooring chains comprising high manganese steels and associated methods
CN109058278A (zh) * 2018-09-26 2018-12-21 安徽博耐克摩擦材料有限公司 一种汽车刹车线
CN109026974A (zh) * 2018-09-26 2018-12-18 安徽博耐克摩擦材料有限公司 一种汽车用刹车线
CN109266975B (zh) * 2018-10-25 2021-08-31 青岛天赢智能工业股份有限公司 一种高强度高低温冲击韧性合金及其制备和热处理工艺
KR102065276B1 (ko) * 2018-10-26 2020-02-17 주식회사 포스코 극저온 인성 및 연성이 우수한 압력용기용 강판 및 그 제조 방법
CN110484818B (zh) * 2019-09-03 2020-08-14 山东钢铁股份有限公司 一种石油防喷器胶芯支撑体用钢及其生产方法
CN116623103A (zh) * 2023-05-16 2023-08-22 南京钢铁股份有限公司 一种破断力120kN级高强链条及其制备方法

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Also Published As

Publication number Publication date
JP2007520633A (ja) 2007-07-26
CN1764734A (zh) 2006-04-26
BRPI0503588B1 (pt) 2013-09-10
ES2286518T3 (es) 2007-12-01
DE502004003457D1 (de) 2007-05-24
WO2005075693A1 (fr) 2005-08-18
ATE359382T1 (de) 2007-05-15
DK1561833T3 (da) 2007-08-20
ZA200507292B (en) 2007-04-25
EP1561833A1 (fr) 2005-08-10
US20070107808A1 (en) 2007-05-17
CN1764734B (zh) 2010-12-08
BRPI0503588A (pt) 2006-03-07

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