EP0348300A1 - Verfahren und Vorrichtung zur Herstellung eines mehrfachbeschichteten Verbundmetallkörpers - Google Patents

Verfahren und Vorrichtung zur Herstellung eines mehrfachbeschichteten Verbundmetallkörpers Download PDF

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Publication number
EP0348300A1
EP0348300A1 EP89401755A EP89401755A EP0348300A1 EP 0348300 A1 EP0348300 A1 EP 0348300A1 EP 89401755 A EP89401755 A EP 89401755A EP 89401755 A EP89401755 A EP 89401755A EP 0348300 A1 EP0348300 A1 EP 0348300A1
Authority
EP
European Patent Office
Prior art keywords
insert
mold
product
ingot
casting
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.)
Granted
Application number
EP89401755A
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English (en)
French (fr)
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EP0348300B1 (de
Inventor
Pascal Gressin
Roland Bar
Marc Henry
Pierre Pedarre
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.)
Ugine Savoie SA
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Ugine Savoie SA
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 Ugine Savoie SA filed Critical Ugine Savoie SA
Priority to AT89401755T priority Critical patent/ATE79792T1/de
Publication of EP0348300A1 publication Critical patent/EP0348300A1/de
Application granted granted Critical
Publication of EP0348300B1 publication Critical patent/EP0348300B1/de
Anticipated expiration legal-status Critical
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00Casting ingots, e.g. from ferrous metals
    • B22D7/02Casting compound ingots of two or more different metals in the molten state, i.e. integrally cast

Definitions

  • the subject of the present invention is a method and a device for manufacturing a multilayer polymetallic composite product such as a wire, a bar or a sheet, in particular based on steel.
  • the core of a steel part such as a stamped wire or thin sheet, must give the part mechanical strength, the ability to stamp or thermal conductivity while the surface layers are contact with the external environment must resist the aggressiveness of this environment or its abrasive nature, not alter its properties (in the case of food) and have an aesthetic appearance, among others.
  • the core metal and the skin metal consist of products such as a laminated polymetallic sheet, that is to say a composite sheet formed of at least two layers whose nature and composition of the constituent metals of each layer is different.
  • Hot laminating consists of superimposing two or more layers by bringing their large faces into contact, welding their edges and hot laminating the laminate thus obtained in order to achieve a metallurgical bond. as various layers.
  • Cold co-lamination relates to thin products and the bond is not as intimate as that obtained by the process which is the subject of the present invention.
  • the explosion plating process consists in making the metallurgical connection between two superposed sheets thanks to the high speed impact of the latter under the effect of the pressure generated by an explosive material placed above the free surface of a sheets.
  • the reloading process consists in welding a layer of skin metal onto a sheet or structure that has already undergone the transformation steps.
  • the object of the present invention is to: - Producing a multi-layer polymetallic composite product economically and industrially so as to combine in the same product the positive characteristics of each of the constituents, in particular high mechanical characteristics, excellent resistance to all types of corrosion and possibly good thermal conductivity and good drawing properties. - Obtain a constant proportion on the final product (wire, bar, sheet), in the section of these products, of the different materials constituting the composite product. This constant proportion is necessary in order to obtain, after transformation by rolling, a homogeneous product having in particular constant geometric, mechanical and corrosion resistance characteristics. - Take into consideration, the difficulty brought by the absolute necessity, when using an implementation by casting an alloy in a mold, to use an ingot mold having a certain taper or draft in order to be able to demold the piece certified as well obtained.
  • the subject of the invention is therefore a method of manufacture of a polymetallic composite product comprising at least two different metallic layers, characterized in that: an insert covered with a layer of paraffin is suspended, an insert constituting the base metal in a mold which is homothetic to said insert, - And after having poured at source at a determined temperature and a rising rate a filler metal covering the entire insert to obtain a polymetallic ingot, the ingot is surrounded surrounded by the filler metal to a hot rolling process, then optionally cold until the product is obtained, under the usual rolling conditions, - Then an annealing is carried out suitable for the two metal layers to homogenize the mechanical characteristics of the core and the surface of the product.
  • the casting temperature of the filler metal corresponds to an overheating of 30 ° C to 200 ° C.
  • the rate of rise of the filler metal is between 0.5 m / min and 5 m / min and in particular between 1.5 m / min and 2.5 m / min .
  • the invention also relates to a device for manufacturing a polymetallic composite product by source casting formed from at least two different metallic layers, from an ingot mold and an insert constituting the base metal, characterized in that the mold is homothetic with respect to the insert and in that it comprises means for centering the insert.
  • the device constituted by an ingot mold 1 for example in the form of a pyramid trunk open at its lower part and at its upper part.
  • the mold 1 is fixed on a plate 2 so that its small base is oriented downwards.
  • the plate 2 includes centering means 3 of the mold.
  • the plate 2 constituting the bottom of the mold, comprises on the one hand in the axis of the mold a blind hole 4 for centering an insert 5 constituting the base metal and on the other hand two channels 6 for casting in source of a filler metal as will be seen later.
  • the insert 5 for example made of ordinary steel and in the shape of a pyramid trunk, has at its lower part, that is to say on the side of its smallest base, a centering stud 7 constituted by the rest of the pouring channel , and at its upper part, a rod 8 for handling and centering.
  • the ingot mold 1 is homothetic with respect to the insert 5.
  • edges of the pyramid trunk formed by the surface of the insert in position in the ingot mold and the internal surface of the ingot mold must have the same point of convergence.
  • an ingot mold with an internal slope of 3.13%, conical height of 1585 mm, foot width of 388 mm, head length of 492 mm which makes it possible to produce an ingot of 2.7 tonnes, of which the counterweight is cut to obtain an insert of 2.6 tonnes.
  • the mold in which the insert is then placed on which the centering and suspension means 7 and 8 are fixed has a slope of 3.76%, a conical height of 1585 mm, a foot width of 441 mm, a width 560 mm head.
  • a proportion of metal from the insert is thus obtained from 77% of the head part to the foot part of the composite ingot.
  • the ends of the composite ingot over a length not exceeding 100 mm (i.e. less than 1% of the product) are entirely made up of the filler metal so as to completely cover the insert and thus prevent oxidation of the interface between the two materials during hot rolling.
  • the general process for manufacturing a polymetallic composite ingot is carried out as follows.
  • the insert 5 is introduced into the ingot mold 1 so that the centering stud 7 enters the blind hole 4.
  • This stud 7 has a height determined so as to also provide a gap between the bottom of the ingot mold and the lower part of the insert.
  • the mold 1 is closed by a cover 10 which also provides a gap with the upper part of the insert and a frame 11 is put in place which ensures the upper centering of said insert by means of the rod 8.
  • the filler metal consisting of, for example, stainless steel is poured in, which penetrates in the interval 9 through the channels 6 and completely covers the insert, both the lateral faces and the head and the foot of said ordinary steel insert.
  • the paraffin layer coating the insert serves to protect it from oxidation until the last moment when the liquid metal covers it.
  • the casting temperature of the filler metal corresponds to an overheating with respect to the liquidus of at least 30 ° C, and generally between 50 ° and 150 ° C.
  • the stainless steel casting overheating is around 80 ° C
  • the casting speed is between 1.5 and 2.5 m / min
  • the diameter of the feed channels is between 40 and 80 mm.
  • the polymetallic ingot thus obtained is extracted from the ingot mold 1, then is hot rolled.
  • the rolling process is continued until the desired product is obtained, such as a sheet, bar or wire having the desired thickness, possibly supplemented by cold rolling. Since stainless steel covers the core at the top and bottom, the internal material does not come out of its sheath during rolling.
  • an annealing suitable for the two materials present is carried out to homogenize the characteristics mechanics of the core and the surface of the product.
  • the surface stainless steel gives the product resistance to corrosion and oxidation.
  • the final product has a uniform thickness of stainless steel.
  • the manufacture of a composite ingot will be described below, the core of which is a mild steel and the filler metal is a stainless steel.
  • the source-cast stainless steel is of type Z 2CN 18.09, the chemical composition of which is as follows: VS Yes Mn Or Cr Mo 0.019 0.307 1,294 9,148 18.36 0.430 Cu NOT W V Co S 0.235 0.064 0.038 0.073 0.155 0.022 P 0.027 (% by weight)
  • the insert with a diameter equal to 300 mm is of the XC200 type and corresponds to approximately 50% of the total product.
  • the chemical composition of the insert is as follows: VS Yes Mn Or Cr Mo 0.203 0.393 0.874 0.169 0.853 0.410 Cu Al NOT Sn W V 0.114 0.010 0.012 0.010 0.005 0.005 Co S P 0.017 0.024 0.014 (% by weight)
  • the pouring temperature of the stainless steel was 1539 ° C and the rise was smooth over 1 10 ".
  • the diameter of the source channels was 56 mm.
  • the polymetallic ingot was roughened to a diameter of 148 mm and then rolled to a diameter of 10.5 mm, at a temperature of 1120 ° C.
  • annealing of the hyper quenching and / or tempering type was carried out to homogenize the mechanical characteristics, and to avoid decohesions at the interface stainless steel mild steel.
  • Cold rolling was carried out up to a diameter of 2 mm.
  • the surface appearance of the products obtained is excellent and the good adhesion of the filler metal to the base metal makes it possible to avoid any decohesion.
  • the composite material developed according to the process forming the subject of the invention has an outer layer of great inclusiveness and good adhesion.
  • the composite material may have one or more of the following characteristics: - good resistance to corrosion by solutions - good resistance to hot oxidation - good mechanical characteristics - good thermal conductivity - good drawability - aptitude for flow turning - good magnetic property - low coefficient of expansion.
  • the uses of the product thus obtained according to the invention are numerous and varied thanks to the particular qualities provided by the method of obtaining the composite material.
  • the applications in long products, such as wires are for example, vine wire and concrete rods.
  • the material obtained with a judicious combination between the core and the outer layer provides the characteristics and resistance to corrosion, and its price is lower than "solid" stainless steel, if the shades are chosen correctly.
  • Sheets can also be produced which find application in heat exchangers for the chemical and petrochemical industries, diffusers and cookware and exhaust mufflers can be cited as examples.
  • a polymetallic composite sheet obtained according to the process of the present invention is particularly suitable for the manufacture of cooking vessels of which only the surface layers are made of stainless steel and over a very small thickness of the order of one tenth of a mm.
  • An article is thus obtained which has good resistance to corrosion and excellent thermal conductivity which makes it possible to dispense with the heat diffusing inserts.
  • the core of the composite sheet allows easy shaping by stamping in flow forming.
  • the invention is particularly advantageous for exterior stainless steel - interior ordinary steel materials.
  • the invention can be used with other materials.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Non-Insulated Conductors (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
EP89401755A 1988-06-21 1989-06-21 Verfahren und Vorrichtung zur Herstellung eines mehrfachbeschichteten Verbundmetallkörpers Expired - Lifetime EP0348300B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89401755T ATE79792T1 (de) 1988-06-21 1989-06-21 Verfahren und vorrichtung zur herstellung eines mehrfachbeschichteten verbundmetallkoerpers.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8808311A FR2632977A1 (fr) 1988-06-21 1988-06-21 Procede et dispositif de fabrication d'un produit composite polymetallique multicouches par coulee autour d'une insert, suspendu dans une lingotiere
FR8808311 1988-06-21

Publications (2)

Publication Number Publication Date
EP0348300A1 true EP0348300A1 (de) 1989-12-27
EP0348300B1 EP0348300B1 (de) 1992-08-26

Family

ID=9367534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401755A Expired - Lifetime EP0348300B1 (de) 1988-06-21 1989-06-21 Verfahren und Vorrichtung zur Herstellung eines mehrfachbeschichteten Verbundmetallkörpers

Country Status (5)

Country Link
EP (1) EP0348300B1 (de)
AT (1) ATE79792T1 (de)
DE (1) DE68902599T2 (de)
ES (1) ES2034690T3 (de)
FR (1) FR2632977A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011110137A1 (en) 2010-02-04 2011-09-15 Afe Cronite Cz S.R.O. Technology of production of bimetallic and multilayer casts by gravity or spun casting
CN104353793A (zh) * 2014-11-26 2015-02-18 广东省工业技术研究院(广州有色金属研究院) 一种层状复合铝锭的液固相铸造方法
CN108655351A (zh) * 2018-05-30 2018-10-16 舞阳钢铁有限责任公司 加氢反应器用钢12Cr2Mo1R(H)钢锭浇注方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR429942A (fr) * 1911-05-19 1911-10-04 Societe Des Fonderies Forges Et Acieries De Saint- Procédé et dispositif pour la fabrication d'un métal composé de plusieurs métaux superposés
DE329502C (de) * 1917-09-04 1920-11-26 Felten & Guilleaume Carlswerk Verfahren zur Herstellung von Verbundmetallkoerpern
DE650752C (de) * 1933-11-08 1937-09-30 Union Steel Corp Of S A Ltd Kanalstein zur Verwendung beim steigenden Giessen von Hohlbloecken
US2464163A (en) * 1945-02-01 1949-03-08 Sharon Steel Corp Manufacture of stainless clad steel
LU60289A1 (de) * 1969-02-04 1970-06-11
DE2049757A1 (de) * 1969-10-10 1971-04-15 Cie Des Ateliers Et Forges De Verfahren zum Herstellen beschichteter Gegenstände
US4102033A (en) * 1977-03-21 1978-07-25 Kawasaki Steel Corporation Method of producing layer-like clad metal materials
EP0256609A2 (de) * 1986-08-14 1988-02-24 Nobuyoshi Sasaki Formkern für Metallausschmelzverfahren

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR429942A (fr) * 1911-05-19 1911-10-04 Societe Des Fonderies Forges Et Acieries De Saint- Procédé et dispositif pour la fabrication d'un métal composé de plusieurs métaux superposés
DE329502C (de) * 1917-09-04 1920-11-26 Felten & Guilleaume Carlswerk Verfahren zur Herstellung von Verbundmetallkoerpern
DE650752C (de) * 1933-11-08 1937-09-30 Union Steel Corp Of S A Ltd Kanalstein zur Verwendung beim steigenden Giessen von Hohlbloecken
US2464163A (en) * 1945-02-01 1949-03-08 Sharon Steel Corp Manufacture of stainless clad steel
LU60289A1 (de) * 1969-02-04 1970-06-11
DE2049757A1 (de) * 1969-10-10 1971-04-15 Cie Des Ateliers Et Forges De Verfahren zum Herstellen beschichteter Gegenstände
US4102033A (en) * 1977-03-21 1978-07-25 Kawasaki Steel Corporation Method of producing layer-like clad metal materials
EP0256609A2 (de) * 1986-08-14 1988-02-24 Nobuyoshi Sasaki Formkern für Metallausschmelzverfahren

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011110137A1 (en) 2010-02-04 2011-09-15 Afe Cronite Cz S.R.O. Technology of production of bimetallic and multilayer casts by gravity or spun casting
US8746322B2 (en) 2010-02-04 2014-06-10 Cronite Cz S.R.O. Technology of production of bimetallic and multilayer casts by gravity or spun casting
CN104353793A (zh) * 2014-11-26 2015-02-18 广东省工业技术研究院(广州有色金属研究院) 一种层状复合铝锭的液固相铸造方法
CN104353793B (zh) * 2014-11-26 2016-06-29 广东省工业技术研究院(广州有色金属研究院) 一种层状复合铝锭的液固相铸造方法
CN108655351A (zh) * 2018-05-30 2018-10-16 舞阳钢铁有限责任公司 加氢反应器用钢12Cr2Mo1R(H)钢锭浇注方法
CN108655351B (zh) * 2018-05-30 2020-09-11 舞阳钢铁有限责任公司 加氢反应器用钢12Cr2Mo1R(H)钢锭浇注方法

Also Published As

Publication number Publication date
ES2034690T3 (es) 1993-04-01
EP0348300B1 (de) 1992-08-26
ATE79792T1 (de) 1992-09-15
DE68902599D1 (de) 1992-10-01
DE68902599T2 (de) 1993-04-15
FR2632977A1 (fr) 1989-12-22

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