EP3913104A1 - Utilisation d'un matériel en acier - Google Patents

Utilisation d'un matériel en acier Download PDF

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Publication number
EP3913104A1
EP3913104A1 EP21169902.0A EP21169902A EP3913104A1 EP 3913104 A1 EP3913104 A1 EP 3913104A1 EP 21169902 A EP21169902 A EP 21169902A EP 3913104 A1 EP3913104 A1 EP 3913104A1
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EP
European Patent Office
Prior art keywords
steel material
steel
use according
nickel
carbon
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.)
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Application number
EP21169902.0A
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German (de)
English (en)
Inventor
Seyed Amin MOUSAVI RIZZI
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.)
Bilstein GmbH and Co KG
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Bilstein GmbH and Co KG
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Publication date
Application filed by Bilstein GmbH and Co KG filed Critical Bilstein GmbH and Co KG
Publication of EP3913104A1 publication Critical patent/EP3913104A1/fr
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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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
    • 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273—Final recrystallisation annealing
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
    • 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
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • 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
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni

Definitions

  • the invention is based on a stainless austenitic steel St 1.4404 according to the material data sheet of the Deutsche Austechnike from 08.06.2016.
  • a stainless steel should be useful for many areas of application.
  • the main disadvantage of this steel is that it contains a high proportion of nickel as an alloying element, on the order of 10 to 13 percent by weight. Due to the high nickel prices, this leads to a considerable increase in the price of the product, so that due to the high price, the use of this material for many areas of application is out of the question.
  • the aim of the invention is to provide an inexpensive austenitic steel which makes these steel qualities accessible to new areas of application.
  • a nickel-free austenitic steel with a high manganese content is specified, which is extremely useful for the specified use and thus also makes the material accessible for new areas of application.
  • Such a so-called high manganese austenite is sufficiently corrosion-resistant and easily formable, in particular cold-formable, with the steel being able to be used in new areas of application due to its inexpensive composition.
  • nickel is only intended as an exception and in small amounts in order to optimize the ductility properties and improve the corrosion resistance. If the improved corrosion resistance is dispensed with, the proportion of nickel can remain set to zero.
  • the material contains less than 5% deformation-indexed martensite in the case of cold deformation using predominantly the TWIP mechanism.
  • a special feature is also seen in the fact that the technological properties of the steel material are set by rolling the material with a suitable degree of rolling and / or annealing the material at a suitable annealing temperature.
  • alloying elements In the case of alloying elements, a basic distinction must be made as to whether they are carbide, austenite or ferrite formers and for what purpose they are added to the steel.
  • each individual element gives the steel certain specific properties depending on its proportion. If several elements are present, the effect can be increased. However, there are alloy variants in which the individual elements with regard to a certain behavior do not exert their influence in the same direction, but can counteract each other.
  • the presence of the alloying elements in the steel only provides the prerequisite for the desired properties; this can only be achieved through processing and heat treatment.
  • Carbon is the most important and most influential alloying element in steel.
  • every unalloyed steel contains silicon, manganese, phosphorus and sulfur, which are unintentionally added during manufacture.
  • the addition of further alloying elements to achieve special effects as well as the deliberate increase in the manganese and silicon content leads to alloyed steel.
  • With increasing C content the strength and hardenability of the steel increase, whereas its elongation, forgeability, weldability and machinability (using cutting tools) are reduced.
  • the corrosion resistance to water, acids and hot gases is practically not influenced by the carbon.
  • the proportion of carbon is kept relatively low, so that an optimal relationship between strength and elongation is obtained.
  • the aim is to achieve maximum formability.
  • carbon is an austenite former.
  • Mn is an austenite former and is mainly used according to the invention as a cheaper substitute for Ni. This is why a proportion of 10-20% is used in this concept.
  • the main task of Cr is to protect against corrosion. Since in this concept the product is to be used in a corrosive medium, a Cr content of 14-16% is used here in order to obtain increased corrosion protection.
  • Nickel is one of the alloying elements that promote solidification according to the stable iron-carbon system. By reducing the critical cooling rate, nickel increases the hardening and tempering. Nickel also increases the toughness, especially in the low temperature range, has a grain-refining effect and reduces the sensitivity to overheating.
  • the 18/10 chrome-nickel steel (1.4301) is one of the main representatives of corrosion-resistant austenitic steels.
  • nickel is a relatively expensive alloying element and, according to the invention, the proportion here is replaced by manganese.
  • a certain proportion can increase the toughness and also have a positive influence on the stability of the austenite.
  • nickel has a positive effect on corrosion resistance.
  • Nitrogen acts as an austenite former in a similar way to carbon.
  • the nitrogen content in the steel can be increased significantly, some of the nickel in austenitic steels replaces the effect of carbon and the carbon content can be reduced.
  • nitrogen serves as a substitute for carbon and improves corrosion resistance. Furthermore, nitrogen acts as a substitute for the autenite former nickel.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
EP21169902.0A 2020-05-19 2021-04-22 Utilisation d'un matériel en acier Withdrawn EP3913104A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020113495 2020-05-19

Publications (1)

Publication Number Publication Date
EP3913104A1 true EP3913104A1 (fr) 2021-11-24

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EP21169902.0A Withdrawn EP3913104A1 (fr) 2020-05-19 2021-04-22 Utilisation d'un matériel en acier

Country Status (4)

Country Link
US (1) US20210348255A1 (fr)
EP (1) EP3913104A1 (fr)
JP (1) JP2021181614A (fr)
KR (1) KR20210143116A (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904401A (en) * 1974-03-21 1975-09-09 Carpenter Technology Corp Corrosion resistant austenitic stainless steel
EP0249117A2 (fr) * 1981-03-20 1987-12-16 Kabushiki Kaisha Toshiba Procédé de fabrication d'un acier magnétique résistant à la corrosion par fissuration
US5308577A (en) * 1990-04-12 1994-05-03 Crs Holdings, Inc. Austenitic, non-magnetic, stainless steel alloy and articles made therefrom
EP0687745A1 (fr) * 1993-03-25 1995-12-20 Armco Inc. Acier austénitique inoxydable à haute résistance mécanique et présentant une excellente résistance à l'excoriation par frottement
ES2142756A1 (es) * 1998-04-22 2000-04-16 Acerinox Sa Acero inoxidable austenitico con bajo contenido en niquel.
EP1944385A1 (fr) * 2005-11-01 2008-07-16 Nippon Steel & Sumikin Stainless Steel Corporation Acier austenitique inoxydable a forte teneur en manganese pour gaz d'hydrogene sous haute pression

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904401A (en) * 1974-03-21 1975-09-09 Carpenter Technology Corp Corrosion resistant austenitic stainless steel
EP0249117A2 (fr) * 1981-03-20 1987-12-16 Kabushiki Kaisha Toshiba Procédé de fabrication d'un acier magnétique résistant à la corrosion par fissuration
US5308577A (en) * 1990-04-12 1994-05-03 Crs Holdings, Inc. Austenitic, non-magnetic, stainless steel alloy and articles made therefrom
EP0687745A1 (fr) * 1993-03-25 1995-12-20 Armco Inc. Acier austénitique inoxydable à haute résistance mécanique et présentant une excellente résistance à l'excoriation par frottement
ES2142756A1 (es) * 1998-04-22 2000-04-16 Acerinox Sa Acero inoxidable austenitico con bajo contenido en niquel.
EP1944385A1 (fr) * 2005-11-01 2008-07-16 Nippon Steel & Sumikin Stainless Steel Corporation Acier austenitique inoxydable a forte teneur en manganese pour gaz d'hydrogene sous haute pression

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Publication number Publication date
KR20210143116A (ko) 2021-11-26
JP2021181614A (ja) 2021-11-25
US20210348255A1 (en) 2021-11-11

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