US20150090378A1 - Method of hot-shaping and hardening a sheet steel blank - Google Patents

Method of hot-shaping and hardening a sheet steel blank Download PDF

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Publication number
US20150090378A1
US20150090378A1 US13/261,782 US201213261782A US2015090378A1 US 20150090378 A1 US20150090378 A1 US 20150090378A1 US 201213261782 A US201213261782 A US 201213261782A US 2015090378 A1 US2015090378 A1 US 2015090378A1
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US
United States
Prior art keywords
tool pair
temperature
formed product
product
cooled
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.)
Abandoned
Application number
US13/261,782
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English (en)
Inventor
Katarina Eriksson
Jan Larsson
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.)
Gestamp Hardtech AB
Original Assignee
Gestamp Hardtech AB
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
Application filed by Gestamp Hardtech AB filed Critical Gestamp Hardtech AB
Assigned to GESTAMP HARDTECH AB reassignment GESTAMP HARDTECH AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ERIKSSON, KATARINA, LARSSON, JAN
Publication of US20150090378A1 publication Critical patent/US20150090378A1/en
Abandoned legal-status Critical Current

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    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with 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
    • 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
    • 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
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die quenching
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous 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
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • 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 invention relates to a method of hot forming and hardening a sheet steel blank by forming the material heated to the austenite range in a tool pair that rapidly cools the shaped product.
  • a steel with bainite structure can have approximately the same high tensile strength as the one obtained with the press-hardening process but the bainite structure is tougher and more ductile than the martensitic structure.
  • U.S. Pat. No. 6,149,743 describes a method for bainite hardening. The material is rapidly cooled from the austenite range to just above Ms (the temperature for the start of the formation of martensite) and this temperature is maintained for approximately 10 hours and, toward the end of the holding time, the temperature is raised in order to shorten the hardening time. This process can be used for roller bearings.
  • the formed product is rapidly cooled until the product's temperature drops below the temperature for the start of the formation of martensite and the product's temperature is then raised until it exceeds the temperature for the start of the formation of martensite and is maintained there until bainite is formed.
  • the times and the temperatures for the formation of martensite and the formation of bainite can be selected so that the material comes to contain more than 50% by volume bainite.
  • the forming and the rapid cooling take a few seconds while maintaining the heat takes a few minutes.
  • the time for maintaining the heat (the holding time) can be utilized for subsequent working, e.g. edge cutting.
  • FIG. 1 is a time-temperature diagram for an example of a process in accordance with the invention.
  • FIG. 2 is a block diagram that shows the process.
  • FIG. 2 shows a block diagram with an austenitic phase in a furnace 11 , a forming phase in a cooled forming tool 12 , and a subsequent temperature holding in a furnace 13 .
  • the temperature curve in FIG. 1 for an example of a process in accordance with the invention shows a first part 20 that is the heating in a furnace of a blank to the austenite range.
  • the moving of the material to a cooled forming tool pair normally takes 5-10 seconds and entails a small reduction of temperature.
  • the forming in the cold tool pair is in the order of magnitude of one or a few seconds but the product must remain in the tools until it is rapidly cooled to somewhat below Ms (the temperature for the start of a formation of martensite).
  • Ms the temperature for the start of a formation of martensite
  • the formation of martensite is instantaneous and is a function of the temperature but is not a function of the time. This cooling is accordingly carried out with the tool pair as fixture.
  • the forming and rapid cooling is designated as 22 .
  • the product is rapidly taken out of the tool pair and the started formation of martensite generates heat and entails an elevation of temperature 23 that may exceed Ms. Additional heat can be used, e.g., induction heat or radiant heat in order to rapidly bring the temperature up above Ms.
  • the product is then moved to a furnace where the product is maintained at a rather even temperature somewhat above Ms for a number of minutes represented by the curve part 24 .
  • the product is thereafter cooled down in the air, which is represented by the dashed curve part 25 or is speeded up as is represented by the curve part 26 .
  • the start of formation of martensite favours the formation of bainite and the holding time for the formation of bainite is shortened, generally to less than half an hour or below 10 minutes or even below 1 min. This is a prerequisite for an economical process
  • the amount of martensite can be predetermined by selecting how much the temperature is lowered below Ms.
  • the temperature for the formation of bainite can be made to vary by a few tens of degrees and therefore the holding time can be used for subsequent working, e.g. edge cutting, which is advantageous to carry out before the material reaches its full hardness, since this reduces the wear on the tool and also reduces the risk for the initiation of fissures and the following formation of fissures when the product is used.
  • the subsequent working can also be integrated into the shaping tool and be integrated in the curve part 22 , i.e. it can be carried out before or during the formation of martensite.
  • the product can be formed in a first tool pair and cooled down to just over Ms and the formed product can then be moved to a second tool pair that makes the fixture and cools the product down to somewhat below Ms.
  • This second tool pair can carry out the subsequent work at the same time, e.g. edge cutting, before the product is moved to the furnace for maintaining the heat.
  • the subsequent working can be integrated in the first tool pair.
  • the two tool pairs can work simultaneously, which shortens the cycle time.
  • Boron steel is used in conventional press hardening, that is, a carbon-manganese steel with boron, that completely hardens to martensite.
  • a carbon-silicon-manganese steel can be suitably used in a process in accordance with the invention.
  • the steel can have a carbon content of 0.2-0.3 weight %, a manganese content of 1-2 weight % and a silicon content of 1-2 weight %.
  • chromium and other customary alloy substances with a total content less than 1 weight % may be present. Silicon prevents the separation of cementite and creates the desired microstructure.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
US13/261,782 2011-07-06 2012-07-04 Method of hot-shaping and hardening a sheet steel blank Abandoned US20150090378A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE1100523-8 2011-07-06
SE1100523A SE1100523A1 (sv) 2011-07-06 2011-07-06 Sätt att varmforma och härda ett tunnplåtsämne
PCT/SE2012/000104 WO2013006108A1 (en) 2011-07-06 2012-07-04 A method of hot-shaping and hardening a sheet steel blank

Publications (1)

Publication Number Publication Date
US20150090378A1 true US20150090378A1 (en) 2015-04-02

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Application Number Title Priority Date Filing Date
US13/261,782 Abandoned US20150090378A1 (en) 2011-07-06 2012-07-04 Method of hot-shaping and hardening a sheet steel blank

Country Status (7)

Country Link
US (1) US20150090378A1 (sv)
EP (1) EP2729587A4 (sv)
JP (1) JP2014524979A (sv)
KR (1) KR20140051934A (sv)
CN (1) CN103582707A (sv)
SE (1) SE1100523A1 (sv)
WO (1) WO2013006108A1 (sv)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3327152A1 (en) * 2016-11-29 2018-05-30 Tata Steel UK Ltd Method for hot-forming a steel blank
US11050383B2 (en) 2019-05-21 2021-06-29 Nextracker Inc Radial cam helix with 0 degree stow for solar tracker
US11159120B2 (en) 2018-03-23 2021-10-26 Nextracker Inc. Multiple actuator system for solar tracker
US11387771B2 (en) 2018-06-07 2022-07-12 Nextracker Llc Helical actuator system for solar tracker

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014016614A1 (de) * 2014-10-31 2016-05-04 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung eines Bauteils durch Umformen einer Platine aus Stahl
US20210115527A1 (en) 2016-11-29 2021-04-22 Tata Steel Ijmuiden B.V. Method for manufacturing a hot-formed article, and obtained article
WO2018174082A1 (ja) 2017-03-24 2018-09-27 新日鐵住金株式会社 ハット部材およびその製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02153019A (ja) * 1988-12-06 1990-06-12 Mazda Motor Corp 鋼部材の製造方法
US20070107203A1 (en) * 2005-10-25 2007-05-17 Benteler Automobiltechnik Gmbh Method of making a shaped sheet-metal part
US20110094282A1 (en) * 2009-10-23 2011-04-28 Thyssenkrupp Umformtechnik Gmbh Method and hot forming system for producing a hardened, hot formed workpiece
US20130048161A1 (en) * 2010-03-09 2013-02-28 Jfe Steel Corporation High strength press-formed member and method for manufacturing the same

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337376A (en) * 1966-12-27 1967-08-22 United States Steel Corp Method of hardening hypereutectoid steels
JPS5235756A (en) * 1975-09-16 1977-03-18 Honda Motor Co Ltd Method of making brake disc
JPH09296214A (ja) * 1996-04-29 1997-11-18 Aisin Seiki Co Ltd 固体成形オーステンパー処理方法及び装置
NL1006539C2 (nl) * 1997-07-10 1999-01-12 Skf Ind Trading & Dev Werkwijze voor het uitvoeren van een warmtebehandeling op metalen ringen, en aldus verkregen lagerring.
SE510344C2 (sv) * 1997-08-01 1999-05-17 Ovako Steel Ab Sätt för fullständig bainithärdning av stål
FR2839727B1 (fr) * 2002-05-14 2004-06-25 Technologica Sarl Procede d'elaboration et de mise en forme de pieces en fonte a graphite spheroidal a caracteristiques mecaniques elevees
US20060011274A1 (en) * 2002-09-04 2006-01-19 Colorado School Of Mines Method for producing steel with retained austenite
JP2005177805A (ja) * 2003-12-19 2005-07-07 Nippon Steel Corp ホットプレス成形方法
JP2006089795A (ja) * 2004-09-22 2006-04-06 Ntn Corp 転がり軸受軌道輪およびその製造方法ならびに転がり軸受
JP4724538B2 (ja) * 2005-11-22 2011-07-13 新日本製鐵株式会社 トランスファープレスによる成形方法及びトランスファープレス装置
DE102008051992B4 (de) * 2008-10-16 2011-03-24 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Werkstücks, Werkstück und Verwendung eines Werkstückes
CN102458708B (zh) * 2009-06-22 2014-07-23 新日铁住金株式会社 钢板的热压成型方法、钢板的热压成型装置及钢成型部件

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02153019A (ja) * 1988-12-06 1990-06-12 Mazda Motor Corp 鋼部材の製造方法
US20070107203A1 (en) * 2005-10-25 2007-05-17 Benteler Automobiltechnik Gmbh Method of making a shaped sheet-metal part
US20110094282A1 (en) * 2009-10-23 2011-04-28 Thyssenkrupp Umformtechnik Gmbh Method and hot forming system for producing a hardened, hot formed workpiece
US20130048161A1 (en) * 2010-03-09 2013-02-28 Jfe Steel Corporation High strength press-formed member and method for manufacturing the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3327152A1 (en) * 2016-11-29 2018-05-30 Tata Steel UK Ltd Method for hot-forming a steel blank
US11159120B2 (en) 2018-03-23 2021-10-26 Nextracker Inc. Multiple actuator system for solar tracker
US11283395B2 (en) 2018-03-23 2022-03-22 Nextracker Inc. Multiple actuator system for solar tracker
US11711051B2 (en) 2018-03-23 2023-07-25 Nextracker Llc Multiple actuator system for solar tracker
US11387771B2 (en) 2018-06-07 2022-07-12 Nextracker Llc Helical actuator system for solar tracker
US11050383B2 (en) 2019-05-21 2021-06-29 Nextracker Inc Radial cam helix with 0 degree stow for solar tracker
US11705859B2 (en) 2019-05-21 2023-07-18 Nextracker Llc Radial cam helix with 0 degree stow for solar tracker

Also Published As

Publication number Publication date
WO2013006108A1 (en) 2013-01-10
KR20140051934A (ko) 2014-05-02
CN103582707A (zh) 2014-02-12
EP2729587A1 (en) 2014-05-14
SE535821C2 (sv) 2013-01-02
SE1100523A1 (sv) 2013-01-02
JP2014524979A (ja) 2014-09-25
EP2729587A4 (en) 2015-03-18

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AS Assignment

Owner name: GESTAMP HARDTECH AB, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ERIKSSON, KATARINA;LARSSON, JAN;REEL/FRAME:031719/0338

Effective date: 20131113

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION