EP1015653B1 - Cuve metallurgique - Google Patents

Cuve metallurgique Download PDF

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Publication number
EP1015653B1
EP1015653B1 EP98947371A EP98947371A EP1015653B1 EP 1015653 B1 EP1015653 B1 EP 1015653B1 EP 98947371 A EP98947371 A EP 98947371A EP 98947371 A EP98947371 A EP 98947371A EP 1015653 B1 EP1015653 B1 EP 1015653B1
Authority
EP
European Patent Office
Prior art keywords
steel
quenching
max
lengths
tempering
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
EP98947371A
Other languages
German (de)
English (en)
Other versions
EP1015653A1 (fr
Inventor
Walter Bendick
Günter Schmitz
Siegfried Müller
Dieter Uwer
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP1015653A1 publication Critical patent/EP1015653A1/fr
Application granted granted Critical
Publication of EP1015653B1 publication Critical patent/EP1015653B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C22C38/18—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
    • 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
    • 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

Definitions

  • the invention relates to a metallurgical vessel, in particular converter for the Treatment of molten metal, consisting of a refractory Brick lining and a surrounding metal shell according to the Preamble of claim 1.
  • Metallurgical vessels such as B. Converters or steel mill pans are next to the static load from the weight of the lining and the filled liquid molten metal also a thermal load due to the high Exposed to temperatures.
  • the supporting metal jacket of these vessels must therefore be made of a material that has a certain creep rupture strength, e.g. B. for Has 100 000 h based on a predetermined temperature.
  • B. for Has 100 000 h based on a predetermined temperature.
  • the tolerable maximum temperature is 355 400 ° C.
  • the Vessel jacket temperatures Connected due to the use of high carbon brick lining with a strong burning of the lining towards the end of the journey, the Vessel jacket temperatures. It also requires increasing secondary metallurgical treatment, e.g. B.
  • a tolerable temperature 500 ° C., preferably of 550 ° C.
  • Fig. 1 discloses a steel with the composition according to the invention, but without Mo content; among other things, the steel is stated to be suitable for reaction vessels in chemical engineering with elevated pressures and temperatures; it is vacuum degassed and rolled into heavy plate, which is water-tempered. Heat-resistant steels are also known from the boiler tube area which are suitable for a temperature range of 500 or 550 ° C., for example 15 Mo 3, 13 CrMo 44 or 10 CrMo 9.10.
  • the object of the invention is to provide a metallurgical vessel of the generic type to specify, the load-bearing metal sheath a sufficient creep strength up to to max. 550 ° C and after welding none Stress relieving is required.
  • FIG. 1 shows a converter 1 produced according to the invention in a longitudinal section. This has one of several shots 6, 7 and dumplings 8 Composite metal jacket 2, a foot ring 3 and a muzzle ring 4 arranged at the upper edge.
  • refractory material 5 Within the Metal sheath 2 is arranged refractory material 5, the thickness of which with the travel time of the converter 1 decreases as a result of burning and washing out. The waning insulating thickness of the refractory material leads to higher temperatures in the Metal sheath that must be endured over the long term.
  • FIG. 2 shows an external view of the converter 1 shown in FIG. 1.
  • a steel melt is treated with calcium and vacuum before pouring and then shows the following actual analysis in percent by weight.
  • This molten steel is cast in a continuous casting process to form a slab with a thickness of 260 mm and a width of 2300 mm.
  • a sheet with a thickness of 80 mm and a width of 2900 mm and a length of 6000 mm is rolled out of the slab in several passes in a hot rolling mill ,
  • the individual shape change ⁇ h in the individual stitches is greater than 0.1.
  • the heavy plate produced in this way is subjected to tempering, consisting of heating to an austenite temperature of 920 ° C with subsequent water quenching. This heat treatment can be repeated depending on the requirements for fine grain.
  • the heavy plates are cut to the required bending dimensions. This is followed by bending to form shells at room temperature or, if the rolling pressure is insufficient, by heating to up to 650 ° C.
  • the bent shells are cut to the required size and the welding edges are worked on.
  • several trays are put together, measured and stapled.
  • the welding is then carried out in transportable units. On the construction site, the individual shots or debris parts are put together and, for example, welded together to form a converter.
  • the otherwise required stress relief annealing after welding can be omitted according to the invention.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Heat Treatment Of Articles (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Claims (6)

  1. Récipient métallurgique, en particulier convertisseur pour le traitement de matières en fusion métalliques liquides, en particulier de l'acier, constitué d'une maçonnerie réfractaire et d'une enveloppe métallique porteuse entourant celle-ci, qui est constituée de viroles et de pièces embouties soudées les unes aux autres en acier résistant à la chaleur ayant des épaisseurs de tôle jusqu'à 100 mm,
    caractérisé en ce que, comme acier résistant à la chaleur, on utilise un acier de construction à grains fins, ayant subi une trempe à l'eau et un revenu, à résistance élevée, ayant la composition, en pourcentage pondéral :
    C 0,14 - 0,22
    Cr 0,4 - 1,0
    Mo 0,3 - 0,8
    Ni 1,5 - 3,0
    V 0,05 - 0,12
    Mn 0,7 - 1,3
    Pmax 0,015
    Smax 0,003
    Al 0,015 - 0,065
    Si 0,20 - 0,60
    Cumax 0,15
    Nmax 0,012
    Camax 0,004
    le restant étant du fer et des impuretés liées à la fabrication.
  2. Récipient métallurgique selon la revendication 1,
    caractérisé en ce que la rupture de fluage pour une durée de 10000 h vaut, à 500°C, 220 N/mm2 et, à 550°C, 130 N/mm2.
  3. Procédé pour fabriquer un récipient métallurgique selon la revendication 1, comportant les étapes de procédé
    faire fondre un acier calmé selon le procédé de soufflage d'oxygène ayant une composition selon la revendication 1,
    couler en continu une brame,
    réchauffer la brame,
    laminer en grosse tôle,
    faire subir une trempe et un revenu à la grosse tôle,
    cuire des pièces de tôle,
    cintrer en viroles et/ou presser en pièces embouties,
    souder les viroles et pièces embouties en une enveloppe métallique,
    appliquer la maçonnerie réfractaire,
    avant la coulée, l'acier étant traité par du calcium par soufflage d'un composé de calcium dans le bain d'acier et, ensuite, étant traité sous vide, et le laminage à chaud étant effectué en liaison avec une trempe et un revenu en plusieurs étapes de déformation, qui présentent une modification de forme individuelle de εh > 0,1, et, après le soudage des pièces embouties ou viroles réalisées à partir de la grosse tôle, un recuit léger de détensionnement ne s'appliquant pas.
  4. Procédé selon la revendication 3,
    caractérisé en ce que la trempe et le revenu comportent une trempe à l'eau à partir du domaine austénitique avec un revenu final.
  5. Procédé selon la revendication 3,
    caractérisé en ce que la trempe et le revenu comportent un réchauffement double à la température austénitique avec trempe à l'eau respective et un revenu final.
  6. Procédé selon les revendications 4 et 5,
    caractérisé en ce que la température de revenu se trouve dans la plage entre 690 - 720°C.
EP98947371A 1997-08-19 1998-07-24 Cuve metallurgique Expired - Lifetime EP1015653B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19736720A DE19736720C1 (de) 1997-08-19 1997-08-19 Metallurgisches Gefäß
DE19736720 1997-08-19
PCT/DE1998/002203 WO1999009232A1 (fr) 1997-08-19 1998-07-24 Cuve metallurgique

Publications (2)

Publication Number Publication Date
EP1015653A1 EP1015653A1 (fr) 2000-07-05
EP1015653B1 true EP1015653B1 (fr) 2002-01-09

Family

ID=7839941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98947371A Expired - Lifetime EP1015653B1 (fr) 1997-08-19 1998-07-24 Cuve metallurgique

Country Status (8)

Country Link
US (1) US6368549B1 (fr)
EP (1) EP1015653B1 (fr)
JP (1) JP2001515148A (fr)
AT (1) ATE211778T1 (fr)
AU (1) AU9431498A (fr)
DE (2) DE19736720C1 (fr)
ES (1) ES2166618T3 (fr)
WO (1) WO1999009232A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK1052296T3 (da) * 1999-05-08 2005-04-11 Thyssenkrupp Stahl Ag Anvendelse af et stål til fremstilling af panserplader
DE10359345B3 (de) * 2003-12-16 2005-09-15 Daimlerchrysler Ag Vorrichtung zur Verbesserung der Sichtverhältniesse in einem Kraftfahrzeug
JP3903321B2 (ja) * 2004-12-28 2007-04-11 株式会社大紀アルミニウム工業所 溶融金属取鍋
US8486251B2 (en) * 2008-08-05 2013-07-16 Exxonmobil Research And Engineering Company Process for regenerating alkali metal hydroxides by electrochemical means

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE540263A (fr) *
US3989231A (en) * 1972-03-09 1976-11-02 British Steel Corporation Heat treatment of steel
SE371211B (fr) * 1973-03-12 1974-11-11 Uddeholms Ab
JPS5925957A (ja) * 1982-08-03 1984-02-10 Nittoku Kako Center:Kk ブレ−カ−用高じん性チゼル
US4468249A (en) * 1982-09-16 1984-08-28 A. Finkl & Sons Co. Machinery steel
JPH0250911A (ja) * 1988-08-15 1990-02-20 Nippon Steel Corp 疲労特性の良い金型用鋼板の製造方法
JP2986601B2 (ja) * 1991-12-25 1999-12-06 川崎製鉄株式会社 高強度高靱性高温圧力容器用鋼
JPH0681078A (ja) * 1992-07-09 1994-03-22 Sumitomo Metal Ind Ltd 低降伏比高強度鋼材およびその製造方法
DE4223895C1 (de) * 1992-07-21 1994-03-17 Thyssen Stahl Ag Verfahren zur Herstellung von dicken Panzerblechen
US5525167A (en) * 1994-06-28 1996-06-11 Caterpillar Inc. Elevated nitrogen high toughness steel article
JPH0841582A (ja) * 1994-07-29 1996-02-13 Nippon Steel Corp 大入熱溶接部靱性の優れた低合金耐熱鋼
JP3238031B2 (ja) * 1995-01-18 2001-12-10 新日本製鐵株式会社 高寿命浸炭軸受鋼
US5853502A (en) * 1995-08-11 1998-12-29 Sumitomo Metal Industries, Ltd. Carburizing steel and steel products manufactured making use of the carburizing steel

Also Published As

Publication number Publication date
EP1015653A1 (fr) 2000-07-05
DE19736720C1 (de) 1999-05-06
JP2001515148A (ja) 2001-09-18
ES2166618T3 (es) 2002-04-16
ATE211778T1 (de) 2002-01-15
WO1999009232A1 (fr) 1999-02-25
AU9431498A (en) 1999-03-08
US6368549B1 (en) 2002-04-09
DE59802854D1 (de) 2002-02-28

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