DK3899062T3 - Varmvalset stål og en fremgangsmåde til fremstilling heraf - Google Patents

Varmvalset stål og en fremgangsmåde til fremstilling heraf Download PDF

Info

Publication number
DK3899062T3
DK3899062T3 DK19821210.2T DK19821210T DK3899062T3 DK 3899062 T3 DK3899062 T3 DK 3899062T3 DK 19821210 T DK19821210 T DK 19821210T DK 3899062 T3 DK3899062 T3 DK 3899062T3
Authority
DK
Denmark
Prior art keywords
hot
manufacturing
rolled steel
rolled
steel
Prior art date
Application number
DK19821210.2T
Other languages
English (en)
Inventor
Lode Duprez
Tom Waterschoot
Steenberge Nele Van
Sanchez Laura Moli
Original Assignee
Arcelormittal
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 Arcelormittal filed Critical Arcelormittal
Application granted granted Critical
Publication of DK3899062T3 publication Critical patent/DK3899062T3/da

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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • C21D6/001—Heat treatment of ferrous alloys containing Ni
    • 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
    • C21D6/007—Heat treatment of ferrous alloys containing Co
    • 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
    • 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
    • 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
    • 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
    • C21D8/0263—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 following 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
    • 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
    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • 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
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • C22C38/105—Ferrous alloys, e.g. steel alloys containing cobalt containing Co and Ni
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing 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
    • C22C38/42—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
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
    • 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
    • C21D2211/004—Dispersions; Precipitations
    • 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

Landscapes

  • 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 Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
DK19821210.2T 2018-12-17 2019-12-11 Varmvalset stål og en fremgangsmåde til fremstilling heraf DK3899062T3 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/IB2018/060185 WO2020128568A1 (en) 2018-12-17 2018-12-17 Hot rolled and steel and a method of manufacturing thereof
PCT/IB2019/060647 WO2020128725A1 (en) 2018-12-17 2019-12-11 Hot rolled and steel and a method of manufacturing thereof

Publications (1)

Publication Number Publication Date
DK3899062T3 true DK3899062T3 (da) 2025-03-31

Family

ID=65409110

Family Applications (1)

Application Number Title Priority Date Filing Date
DK19821210.2T DK3899062T3 (da) 2018-12-17 2019-12-11 Varmvalset stål og en fremgangsmåde til fremstilling heraf

Country Status (23)

Country Link
US (2) US12123081B2 (da)
EP (1) EP3899062B1 (da)
JP (3) JP2022513973A (da)
KR (1) KR102634503B1 (da)
CN (1) CN113166827A (da)
BR (1) BR112021010529B1 (da)
CA (1) CA3121604C (da)
DK (1) DK3899062T3 (da)
ES (1) ES3019383T3 (da)
FI (1) FI3899062T3 (da)
HR (1) HRP20250393T1 (da)
HU (1) HUE070755T2 (da)
LT (1) LT3899062T (da)
MA (1) MA54506B1 (da)
MX (1) MX2021007122A (da)
PL (1) PL3899062T3 (da)
PT (1) PT3899062T (da)
RS (1) RS66749B1 (da)
SI (1) SI3899062T1 (da)
SM (1) SMT202500163T1 (da)
UA (1) UA127398C2 (da)
WO (2) WO2020128568A1 (da)
ZA (1) ZA202103681B (da)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113549842A (zh) * 2021-06-21 2021-10-26 首钢集团有限公司 一种高强度防弹头盔壳及其制备方法
CN113751679B (zh) * 2021-09-09 2022-10-28 中南大学 一种无钴马氏体时效钢冷轧薄带的制造方法
CN114369769B (zh) * 2021-11-30 2022-10-11 中国科学院金属研究所 一种超高强高韧贝氏体时效钢及其热处理工艺
CN119137305A (zh) * 2022-07-12 2024-12-13 安赛乐米塔尔公司 热轧钢及其制造方法
CN117758161B (zh) * 2023-12-15 2025-10-24 东北大学 一种双峰异质结构的马氏体时效钢及其制备方法
CN121046743B (zh) * 2025-10-28 2026-01-06 嘉兴精科科技有限公司 一种注射成型用高强耐蚀马氏体时效钢粉末及利用其制备的高强耐蚀马氏体时效钢

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453102A (en) * 1966-03-08 1969-07-01 Int Nickel Co High strength,ductile maraging steel
GB1142555A (en) * 1966-08-25 1969-02-12 Int Nickel Ltd Nickel-cobalt steels
JPS5122616A (en) * 1974-08-21 1976-02-23 Hitachi Ltd Nitsukeru marueejingukokeihankoshitsujiseizairyono seiho
JPS5621051B2 (da) * 1975-02-21 1981-05-16
JPS51117915A (en) * 1975-04-11 1976-10-16 Hitachi Ltd High strength and high toughness maraging steel type semi-hard magneti c material
JPS5323818A (en) * 1976-08-18 1978-03-04 Hitachi Ltd Production of rotor material for high speed hysteresis motors
JPS5629623A (en) * 1979-08-14 1981-03-25 Mitsubishi Heavy Ind Ltd Processing and heat treatment of steel
JPS60234920A (ja) * 1984-05-04 1985-11-21 Nippon Kokan Kk <Nkk> 超高張力マルエ−ジング冷延鋼板の製造方法
US4832909A (en) 1986-12-22 1989-05-23 Carpenter Technology Corporation Low cobalt-containing maraging steel with improved toughness
JPH07216510A (ja) * 1994-02-04 1995-08-15 Hitachi Metals Ltd 高強度リードフレーム材料およびその製造方法
EP1111080B1 (en) 1999-12-24 2007-03-07 Hitachi Metals, Ltd. Maraging steel having high fatigue strength and maraging steel strip made of same
JP4213503B2 (ja) * 2003-04-15 2009-01-21 本田技研工業株式会社 マルエージング鋼の熱処理方法
US20100037994A1 (en) 2008-08-14 2010-02-18 Gopal Das Method of processing maraging steel
CN101736140A (zh) * 2008-11-14 2010-06-16 沈阳科金特种材料有限公司 一种马氏体时效钢板材冲压成型的方法
JP6653113B2 (ja) 2013-08-23 2020-02-26 大同特殊鋼株式会社 疲労特性に優れたマルエージング鋼
CN105331890B (zh) 2015-11-23 2017-07-28 南京钢铁股份有限公司 一种在线淬火生产高韧性5Ni钢中厚板的方法

Also Published As

Publication number Publication date
RS66749B1 (sr) 2025-05-30
ES3019383T3 (en) 2025-05-20
EP3899062A1 (en) 2021-10-27
PL3899062T3 (pl) 2025-06-09
SI3899062T1 (sl) 2025-05-30
BR112021010529A2 (pt) 2021-08-24
US12123081B2 (en) 2024-10-22
US20250011906A1 (en) 2025-01-09
JP2026032202A (ja) 2026-02-25
MA54506A (fr) 2022-03-23
CN113166827A (zh) 2021-07-23
FI3899062T3 (fi) 2025-04-10
US20220074029A1 (en) 2022-03-10
PT3899062T (pt) 2025-04-11
KR20210091774A (ko) 2021-07-22
HUE070755T2 (hu) 2025-07-28
UA127398C2 (uk) 2023-08-09
JP2022513973A (ja) 2022-02-09
EP3899062B1 (en) 2025-01-29
LT3899062T (lt) 2025-04-25
WO2020128725A1 (en) 2020-06-25
JP2023182698A (ja) 2023-12-26
MX2021007122A (es) 2021-08-11
WO2020128568A1 (en) 2020-06-25
ZA202103681B (en) 2022-04-28
BR112021010529B1 (pt) 2024-01-23
CA3121604C (en) 2023-08-15
KR102634503B1 (ko) 2024-02-07
HRP20250393T1 (hr) 2025-05-09
MA54506B1 (fr) 2025-04-30
CA3121604A1 (en) 2020-06-25
SMT202500163T1 (it) 2025-05-12

Similar Documents

Publication Publication Date Title
DK3899062T3 (da) Varmvalset stål og en fremgangsmåde til fremstilling heraf
DK3884111T3 (da) Tp-fri monopæl og fremgangsmåde til dannelse heraf
EP3569727A4 (en) STEEL PLATE AND PROCESS FOR PRODUCING THE SAME
DK3563348T3 (da) Håndholdt indretning og fremgangsmåde til at bestemme en plantestatus
DK3955576T3 (da) Fremgangsmåde og anordning til interframe-forudsigelse
DK3335434T3 (da) System og fremgangsmåde til at personliggøre et høreapparat
DK3259405T3 (da) Fremgangsmåde til at bygge et fundament omfattende en stålmonopæl og en betondel og et associeret fundament til byggearbejde
EP3686310A4 (en) NPR ANCHOR ROD STEEL MATERIAL AND ITS PRODUCTION PROCESS
ES2805875T5 (en) Cr-mn-n austenitic heat-resistant steel and a method for manufacturing the same
EP3653745A4 (en) HIGH-STRENGTH STEEL SHEET AND MANUFACTURING METHOD THEREOF
IL280549A (en) Material and method for producing cell receiving scaffold
ZA202005177B (en) Forged part of bainitic steel and a method of manufacturing thereof
DK4000045T3 (da) Renderingsfremgangsmåde og renderingsindretning til udførelse deraf
PL3401032T3 (pl) Przyrząd złożony oraz sposób wytwarzania blaszanego elementu konstrukcyjnego
DK3397733T3 (da) Anordning og fremgangsmåde til fremstilling af en gas
EP3611292A4 (en) TINNED STEEL SHEET AND TINNED STEEL SHEET MANUFACTURING PROCESS
ZA201906697B (en) Non-pickled hot-rolled steel sheet and method for manufacturing same
DK3300810T3 (da) Indretning og fremgangsmåde til planering af et metalprodukt
DK3285061T3 (da) Fremgangsmåde og indretning til hårdhedsafprøvning
DK3771211T3 (da) Fremgangsmåde og anordning til tovejsinterforudsigelse
DK4034794T3 (da) Annulus-forbindelse og fremgangsmåde til forbindelse
SG11202005101PA (en) High-mn steel and method for manufacturing same
DK3519645T3 (da) Betonloft, kit til fremstilling af et betonloft, og fremgangsmåde til fremstilling af et betonloft
DK4028371T3 (da) Betonelement og fremgangsmåde til fremstilling heraf
DK3951676T3 (da) Hjælpeindretning til oprettelse af en tidsplan og hjælpefremgangsmåde til oprettelse af en tidsplan