SE545732C2 - Method for producing ausferritic steel and ductile iron, austempered in rapid cycles followed by baking - Google Patents

Method for producing ausferritic steel and ductile iron, austempered in rapid cycles followed by baking

Info

Publication number
SE545732C2
SE545732C2 SE1950152A SE1950152A SE545732C2 SE 545732 C2 SE545732 C2 SE 545732C2 SE 1950152 A SE1950152 A SE 1950152A SE 1950152 A SE1950152 A SE 1950152A SE 545732 C2 SE545732 C2 SE 545732C2
Authority
SE
Sweden
Prior art keywords
ductile iron
ausferritic
steel
steel alloy
producing
Prior art date
Application number
SE1950152A
Other versions
SE1950152A1 (en
Inventor
Richard Larker
Original Assignee
Ausferritic 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 Ausferritic Ab filed Critical Ausferritic Ab
Priority to SE1950152A priority Critical patent/SE545732C2/en
Priority to EP20155854.1A priority patent/EP3693479A1/en
Publication of SE1950152A1 publication Critical patent/SE1950152A1/en
Publication of SE545732C2 publication Critical patent/SE545732C2/en

Links

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
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • 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
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/607—Molten salts
    • 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
    • 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
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • 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
    • C21D2211/005—Ferrite
    • 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

Abstract

Method for producing an ausferritic steel or an ausferritic ductile iron, which comprises the steps of subjecting a steel alloy having a silicon content of 1.5-4.4 wt% Si and a carbon content of 0.3-0.8 wt% C, or a ductile iron having a silicon content of 2.0-4.6 wt% Si and a carbon content of 2.9-3. 8 wt% C, to an austempering heat treatment comprising the following steps: austenitizing said steel alloy or ductile iron, quenching said steel alloy or ductile iron at a cooling rate that is sufficiently high to prevent predominant formation of proeutectoid ferrite or pearlite, transforming austenite in said quenched steel alloy or ductile iron into an ausferritic structure, and subsequently baking said steel alloy or ductile iron at one or more temperatures to complete said transformation of any remaining austenite into ausferrite, to equalize the carbon distribution within its austenite phase, and to temper any martensite that has formed, to produce an ausferritic steel or an ausferritic ductile iron having a microstructure containing at least 50 volume-% of ausferrite with superior properties at a substantially lower process cost.
SE1950152A 2019-02-08 2019-02-08 Method for producing ausferritic steel and ductile iron, austempered in rapid cycles followed by baking SE545732C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE1950152A SE545732C2 (en) 2019-02-08 2019-02-08 Method for producing ausferritic steel and ductile iron, austempered in rapid cycles followed by baking
EP20155854.1A EP3693479A1 (en) 2019-02-08 2020-02-06 Method for producing ausferritic steel and ductile iron, austempered in rapid cycles followed by baking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1950152A SE545732C2 (en) 2019-02-08 2019-02-08 Method for producing ausferritic steel and ductile iron, austempered in rapid cycles followed by baking

Publications (2)

Publication Number Publication Date
SE1950152A1 SE1950152A1 (en) 2020-08-09
SE545732C2 true SE545732C2 (en) 2023-12-27

Family

ID=69526050

Family Applications (1)

Application Number Title Priority Date Filing Date
SE1950152A SE545732C2 (en) 2019-02-08 2019-02-08 Method for producing ausferritic steel and ductile iron, austempered in rapid cycles followed by baking

Country Status (2)

Country Link
EP (1) EP3693479A1 (en)
SE (1) SE545732C2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112159937B (en) * 2020-09-28 2021-03-30 南京工程学院 High-stability friction-resistant train brake disc and preparation method thereof
CN113699359B (en) * 2021-07-28 2023-03-31 厦门真冈热处理有限公司 Heat treatment method for piston ring of automobile engine
CN114273857A (en) * 2021-12-17 2022-04-05 绍兴力欣液压件有限公司 Preparation process of clutch booster
CN114807544B (en) * 2022-04-07 2023-09-08 扬州大学 Double-temperature double-time combined heat treatment method for high-wear-resistance CrMnMoN alloy

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5522949A (en) * 1994-09-30 1996-06-04 Industrial Materials Technology, Inc. Class of ductile iron, and process of forming same
US5753055A (en) * 1996-11-05 1998-05-19 Standard Car Truck Company Process for austempering ductile iron
WO2004022792A2 (en) * 2002-09-04 2004-03-18 Intermet Corporation Austempered cast iron article and a method of making the same
WO2008076051A1 (en) * 2006-12-16 2008-06-26 Indexator Ab Austempered ductile iron, method for producin this and component comprising this iron
EP2294231A1 (en) * 2008-05-29 2011-03-16 Indexator AB Method&work piece
US20110114229A1 (en) * 2009-08-20 2011-05-19 Southern Cast Products, Inc. Ausferritic Wear-Resistant Steel Castings
EP2465952A1 (en) * 2010-12-16 2012-06-20 General Electric Company Method of producing large components form austempered ductile iron alloys
KR20130034213A (en) * 2011-09-28 2013-04-05 현대제철 주식회사 Working product and method of manufacturing the same
KR20130046928A (en) * 2011-10-28 2013-05-08 현대제철 주식회사 Steel sheet and method of manufacturing the steel sheet
US20130167984A1 (en) * 2012-01-03 2013-07-04 General Electric Company Method Of Making An Austempered Ductile Iron Article
EP2982769A1 (en) * 2014-08-06 2016-02-10 Indexator Group AB Austempered steel, method for producing it, component and semi-finished bad
CN105803312A (en) * 2016-03-28 2016-07-27 长兴德田工程机械有限公司 Air-cooled austenite-bainite abrasion-resistant alloy and manufacturing method thereof

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US4838956A (en) * 1987-04-16 1989-06-13 Mazda Motor Corporation Method of producing a spheroidal graphite cast iron
US5139579A (en) * 1990-04-27 1992-08-18 Applied Process Method for preparing high silicon, low carbon austempered cast iron
US6258180B1 (en) * 1999-05-28 2001-07-10 Waupaca Foundry, Inc. Wear resistant ductile iron
US8657972B2 (en) * 2007-12-26 2014-02-25 Wayne State University Development of a high strength high toughness steel
WO2014145421A2 (en) * 2013-03-15 2014-09-18 Wayne State University Development of nanostructure austempered ductile iron with dual phase microstructure
CN107400821B (en) * 2017-08-04 2019-04-19 河北工业大学 The rolling preparation method of Ultra-low carbon ductile iron abrading-ball

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5522949A (en) * 1994-09-30 1996-06-04 Industrial Materials Technology, Inc. Class of ductile iron, and process of forming same
US5753055A (en) * 1996-11-05 1998-05-19 Standard Car Truck Company Process for austempering ductile iron
WO2004022792A2 (en) * 2002-09-04 2004-03-18 Intermet Corporation Austempered cast iron article and a method of making the same
WO2008076051A1 (en) * 2006-12-16 2008-06-26 Indexator Ab Austempered ductile iron, method for producin this and component comprising this iron
EP2294231A1 (en) * 2008-05-29 2011-03-16 Indexator AB Method&work piece
US20110114229A1 (en) * 2009-08-20 2011-05-19 Southern Cast Products, Inc. Ausferritic Wear-Resistant Steel Castings
EP2465952A1 (en) * 2010-12-16 2012-06-20 General Electric Company Method of producing large components form austempered ductile iron alloys
KR20130034213A (en) * 2011-09-28 2013-04-05 현대제철 주식회사 Working product and method of manufacturing the same
KR20130046928A (en) * 2011-10-28 2013-05-08 현대제철 주식회사 Steel sheet and method of manufacturing the steel sheet
US20130167984A1 (en) * 2012-01-03 2013-07-04 General Electric Company Method Of Making An Austempered Ductile Iron Article
EP2982769A1 (en) * 2014-08-06 2016-02-10 Indexator Group AB Austempered steel, method for producing it, component and semi-finished bad
CN105803312A (en) * 2016-03-28 2016-07-27 长兴德田工程机械有限公司 Air-cooled austenite-bainite abrasion-resistant alloy and manufacturing method thereof

Also Published As

Publication number Publication date
SE1950152A1 (en) 2020-08-09
EP3693479A1 (en) 2020-08-12

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