EP0135554A1 - Improvements to processes for torch cutting metal products - Google Patents

Improvements to processes for torch cutting metal products

Info

Publication number
EP0135554A1
EP0135554A1 EP19840900957 EP84900957A EP0135554A1 EP 0135554 A1 EP0135554 A1 EP 0135554A1 EP 19840900957 EP19840900957 EP 19840900957 EP 84900957 A EP84900957 A EP 84900957A EP 0135554 A1 EP0135554 A1 EP 0135554A1
Authority
EP
European Patent Office
Prior art keywords
burr
face
slab
deposited
product
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.)
Pending
Application number
EP19840900957
Other languages
German (de)
French (fr)
Inventor
Raymond D'haeyer
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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 Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Publication of EP0135554A1 publication Critical patent/EP0135554A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/126—Accessories for subsequent treating or working cast stock in situ for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
    • B23D79/02—Machines or devices for scraping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K7/00—Cutting, scarfing, or desurfacing by applying flames
    • B23K7/08—Cutting, scarfing, or desurfacing by applying flames by applying additional compounds or means favouring the cutting, scarfing, or desurfacing procedure

Definitions

  • the present invention relates to an improvement to the oxycutting process for metal products, in particular slabs for continuous casting.
  • slabs for continuous casting are obtained by cutting off the strand, when the latter is at a high temperature, of the order of 700 ° C. to 1000 ° C.
  • This cutting operation is generally carried out by flame cutting by means of torches arranged above the strand and movable along a trajectory perpendicular to that of the slabs.
  • a burr which, due to the high temperature of the metal, remains firmly attached to the face of the slab. This burr must be removed before sending the slab to the rolling mill, otherwise it risks damaging the rolls and consequently giving rise to surface defects in the rolled product, or blocking the channels for recovering working fluids and consequently to cause stops of the rolling mill train.
  • the subject of the present invention is a method making it possible to remedy this drawback, by ensuring rapid elimination of the oxy-fuel flash.
  • the interface between the burr and the slab generally comprises two zones.
  • the burr In a first zone, the burr is actually welded to the metal of the slab, while in the second zone, it simply adheres to the layer of scale existing on the surface of the slab. It is the weld zone which offers the greatest mechanical resistance to the removal of the burr.
  • the method of the invention aims to facilitate the removal of an oxycutting burr, in particular by preventing or counteracting the formation of a weld zone between the burr and the slab.
  • the process which is the subject of the present invention, in which a slab of continuous casting at a high temperature is subjected to an oxygen cutting operation giving rise to the formation of a burr, is essentially characterized in that the 'a separation surface is created between said burr and the continuous casting slab.
  • said burr is subjected, as soon as it is solidified, to sudden cooling by means of at least one jet of a refrigerant.
  • the refrigerant is preferably water.
  • the zone in which the burr simply adheres to the scale of the slab acts as a crack between the burr and the slab; the present embodiment of the process of the invention makes it possible to ensure the pro pagation of this crack as a result of the contraction caused by the sudden cooling of the burr.
  • a material which is contrary to or prevents the adhesion of the burr to said face is deposited on the appropriate face of the slab, before flame cutting.
  • a material reducing the resistance of the weld between the burr and the slab for example a carbonaceous material having the effect of weakening the area of the weld between the burr and the slab.
  • a layer of a material constituting a thermal barrier is deposited on the face of the slab, before depositing the non-stick substance, between the face of the slab and the non-stick substance, which improves the working conditions of the latter.
  • This double layer prevents any contact and therefore any welding between the burr and the slab.
  • the welding of the burr on the face of the slab is prevented, by applying a plate to said face, preferably metallic, on which the burr is deposited and which can then be removed, mechanically.
  • Elimination of oxygen cutting burrs at the outlet of the continuous casting machine cutting of the strand (continuous) in slabs).
  • a ramp controlled by the computer of the cutting machine projects on the underside of the cutting zones a very thin layer of a thermally insulating substance, having properties of adhesion when hot slab scale, and differential expansion properties different from the behavior of steel.
  • This substance also has diffusing elements in the liquid steel to weaken it and prevent it from being welded to the slab.
  • a mixture of colloidal silica, graphite and vermiculite is used.
  • the cutting is then carried out using the torches.
  • the burr forms on the deposited layer.
  • the burr is then cooled by means of spray bars arranged at the outlet of the cutting zone.
  • the burr receives a thermal shock and contracts.
  • the deposited layer also contracts, but differently, because its composition is studied to favor the differential contraction which leads to the shearing of the burr - layer interface.
  • the deposited layer adheres less well to the slab at low temperature.
  • the steel contained in the burr was fra gilised by local diffusion of the carbon emanating from the layer: it is only very poorly welded to the steel flows which remain in the cutting groove. The combination of all these effects minimizes the adhesion of the burr to the slab. A summary scraping is enough to remove it leaving a clean cutting edge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)

Abstract

Pour éliminer la bavure d'oxycoupage d'un produit métallique, en particulier d'une brame de coulée continue, on crée une surface de séparation entre la dite bavure et la surface du produit, soit en la refroidissant brusquement au moyen d'un agent réfrigérant, soit en déposant sur la surface une substance antiadhérente. Le refroidissement brusque provoque la fissuration de la zone d'adhérence, tandis que la substance antiadhérente forme une barrière, notamment thermique, entre la bavure et le produit.To eliminate the oxycut burr from a metal product, in particular from a continuous casting slab, a separation surface is created between said burr and the surface of the product, either by abruptly cooling it with an agent. refrigerant, or by depositing a non-stick substance on the surface. The sudden cooling causes the adhesion zone to crack, while the non-stick substance forms a barrier, in particular a thermal barrier, between the burr and the product.

Description

Perfectionnements aux procédés d'oxycoupaqe de produits métalliques. Improvements to the oxy-fuel processes of metallic products.
La présente invention concerne une amélioration au procédé d'oxycoupage des produits métalliques, en particulier des brames de coulée continue.The present invention relates to an improvement to the oxycutting process for metal products, in particular slabs for continuous casting.
On sait que les brames de coulée continue sont obtenues par tronçonnage du brin, alors que celui-ci se trouve à une température élevée, de l'ordre de 700°C à 1000°C.It is known that slabs for continuous casting are obtained by cutting off the strand, when the latter is at a high temperature, of the order of 700 ° C. to 1000 ° C.
Cette opération de tronçonnage est généralement exécutée par oxycoupage au moyen de chalumeaux disposés au-dessus du brin et mobiles suivant une trajectoire perpendiculaire à celle des brames.This cutting operation is generally carried out by flame cutting by means of torches arranged above the strand and movable along a trajectory perpendicular to that of the slabs.
Il se forme à cette occasion, du côté opposé aux becs de chalumeaux, une bavure qui, en raison de la température élevée du métal, reste solidement accrochée à la face de la brame. Cette bavure doit être éliminée avant l'envoi de la brame au laminoir, sinon elle risque sόit d'endommager les cylindres et par conséquent de donner lieu à des défauts de surface dans le produit laminé, soit de boucher des canaux de récupération des fluides de travail et par conséquent de provoquer des arrêts du train de laminoir.There is formed on this occasion, on the side opposite to the torches, a burr which, due to the high temperature of the metal, remains firmly attached to the face of the slab. This burr must be removed before sending the slab to the rolling mill, otherwise it risks damaging the rolls and consequently giving rise to surface defects in the rolled product, or blocking the channels for recovering working fluids and consequently to cause stops of the rolling mill train.
Outre divers moyens mécaniques, on a déjà proposé d'éliminer cette bavure, pendant ou après sa formation, soit en la chassant au moyen d'un jet de gaz comprimé, soit en déposant à la surface de la brame une substance assurant le détachement de la bavure après refroidissement suffisant de la brame.In addition to various mechanical means, it has already been proposed to eliminate this burr, during or after its formation, either by expelling it by means of a jet of compressed gas, or by depositing on the surface of the slab a substance ensuring the detachment of burr after sufficient cooling of the slab.
Le recours à un jet de gaz comprimé ne permet cependant pas la complète élimination de la bavure; en outre, sa mise en oeuvre est quelquefois difficile, car elle nécessite un espace qui n' est pas toujours disponible entre les rouleaux du convoyeur.However, the use of a compressed gas jet does not completely eliminate the burr; in addition, its implementation is sometimes difficult, because it requires a space which is not always available between the rollers of the conveyor.
L'application d'une substance antiadhérente à l'endroit où se forme la bavure donne actuellement des résultats variables selon la composition de l'acier. En effet, cette composition conditionne d'une part, la viscosité de l'acier liquide et d'autre part la production et l'adhérence de la calamine. L'acier liquide constituant la bavure entraîne, selon sa viscosité, une érosion plus ou moins importante de la couche de substance déposée et peut compromettre sérieusement son efficacité. Par ailleurs, l'accrochage de cette substance peut être déficient si la calamine n'adhère pas suffisamment à la brame.The application of a non-stick substance to the place where the burr is formed currently gives variable results depending on the composition of the steel. Indeed, this composition conditions on the one hand, the viscosity of the liquid steel and on the other hand the production and the adhesion of the scale. The liquid steel constituting the burr causes, depending on its viscosity, a more or less significant erosion of the layer of deposited substance and can seriously compromise its effectiveness. In addition, the attachment of this substance may be deficient if the scale does not adhere sufficiently to the slab.
En outre, même lorsque le dépôt de substance joue correctement son rôle, la bavure ne se détache aisément que lorsque la brame est suffisamment refroidie. Il peut en résulter des pertes de temps et d'énergie inacceptables. La présente invention a pour objet un procédé permettant de remédier à cet inconvénient, en assurant une élimination rapide de la bavure d ' oxycoupage.In addition, even when the deposit of substance plays its role correctly, the burr does not come off easily until the slab is sufficiently cooled. This can result in unacceptable loss of time and energy. The subject of the present invention is a method making it possible to remedy this drawback, by ensuring rapid elimination of the oxy-fuel flash.
Ce procédé est basé sur la constatation selon laquelle l'interface entre la bavure et la brame comporte généralement deux zones. Dans une première zone, la bavure est réellement soudée au métal de la brame, tandis que dans la seconde zone, elle adhère simplement à la couche de calamine existant à la surface de la brame. C'est la zone de soudure qui oppose la plus grande résistance mécanique à l'enlèvement de la bavure.This process is based on the observation that the interface between the burr and the slab generally comprises two zones. In a first zone, the burr is actually welded to the metal of the slab, while in the second zone, it simply adheres to the layer of scale existing on the surface of the slab. It is the weld zone which offers the greatest mechanical resistance to the removal of the burr.
Le procédé de l'invention vise à faciliter l'enlèvement d'une bavure d 'oxycoupage, notamment en empêchant ou en contrariant la formation d'une zone de soudure entre la bavure et la brame.The method of the invention aims to facilitate the removal of an oxycutting burr, in particular by preventing or counteracting the formation of a weld zone between the burr and the slab.
Le procédé qui fait l'objet de la présente invention, dans lequel on soumet une brame de coulée continue se trouvant à une température élevée à une opération d'oxycoupage donnant lieu à la formation d'une bavure, est essentiellement caractérisé en ce que l'on crée une surface de séparation entre la dite bavure et la brame de coulée continue.The process which is the subject of the present invention, in which a slab of continuous casting at a high temperature is subjected to an oxygen cutting operation giving rise to the formation of a burr, is essentially characterized in that the 'a separation surface is created between said burr and the continuous casting slab.
Selon une première variante d'exécution du procédé de l'invention, on soumet la dite bavure, dès qu'elle est solidifiée, à un refroidissement brusque au moyen d'au moins un jet d'un agent réfrigérant.According to a first alternative embodiment of the method of the invention, said burr is subjected, as soon as it is solidified, to sudden cooling by means of at least one jet of a refrigerant.
Selon l'invention, l'agent réfrigérant est de préférence l'eau.According to the invention, the refrigerant is preferably water.
Le demandeur a en effet constaté que la zone dans laquelle la bavure adhère simplement à la calamine de la brame agit comme une fissure entre la bavure et la brame; la présente forme d' exécution du procédé de l'invention permet d'assurer la pro pagation de cette fissure par suite de la contraction provoquée par le refroidissement brusque de la bavure.The applicant has in fact found that the zone in which the burr simply adheres to the scale of the slab acts as a crack between the burr and the slab; the present embodiment of the process of the invention makes it possible to ensure the pro pagation of this crack as a result of the contraction caused by the sudden cooling of the burr.
Selon une seconde variante d'exécution du procédé de l'invention, on dépose sur la face appropriée de la brame, avant l'oxycoupage, un matériau contrariant ou empêchant l'adhérence de la bavure à la dite face.According to a second alternative embodiment of the method of the invention, a material which is contrary to or prevents the adhesion of the burr to said face is deposited on the appropriate face of the slab, before flame cutting.
Selon l'invention, on peut utiliser à cet effet un matériau diminuant la résistance de la soudure entre la bavure et la brame, par exemple un matériau carboné ayant pour effet de fragiliser la zone de la soudure entre la bavure et la brame.According to the invention, one can use for this purpose a material reducing the resistance of the weld between the burr and the slab, for example a carbonaceous material having the effect of weakening the area of the weld between the burr and the slab.
Selon une deuxième modalité d'exécution de cette variante du procédé de l'invention, on dépose sur la face de la brame, préalablement au dépôt de la substance antiadhérente, une couche d'une matière constituant une barrière thermique, entre la face de la brame et la substance antiadhérente, ce qui améliore les conditions de travail de cette dernière.According to a second embodiment of this variant of the process of the invention, a layer of a material constituting a thermal barrier is deposited on the face of the slab, before depositing the non-stick substance, between the face of the slab and the non-stick substance, which improves the working conditions of the latter.
En particulier, il a été trouvé avantageux de déposer une couche de lait de chaux, sur laquelle on dépose la substance antiadhérente.In particular, it has been found advantageous to deposit a layer of lime milk, on which the non-stick substance is deposited.
Cette couche double empêche tout contact et par conséquent toute soudure entre la bavure et la brame.This double layer prevents any contact and therefore any welding between the burr and the slab.
Il est alors particulièrement intéressant, toujours selon l'invention, de combiner le dépôt de la substance antiadhêrente sur la brame et le refroidissement brusque de la bavure.It is therefore particularly advantageous, still according to the invention, to combine the deposition of the non-stick substance on the slab and the sudden cooling of the burr.
Selon une troisième modalité de mise en oeuvre de cette variante de l'invention, on empêche la soudure de la bavure sur la face de la brame, en appliquant sur la dite face une plaque, dé préférence métallique, sur laquelle la bavure se dépose et qui peut ensuite être enlevée, par voie mécanique.According to a third embodiment of this variant of the invention, the welding of the burr on the face of the slab is prevented, by applying a plate to said face, preferably metallic, on which the burr is deposited and which can then be removed, mechanically.
Bien que la description qui précède ait porté sur l ' enlèvement des bavures d 'oxycoupage formées lors du tronçonnage des brames de coulée continue, il ne sortirait pas du cadre de la présente invention, d ' appliquer ce procédé à d ' autres opérations, telles que le refendage ou découpage longitudinal de brames de coulée continue, ou à d ' autres types de produits susceptibles de présenter des bavures de nature similaire.Although the foregoing description has concerned the removal of the oxy-fuel burrs formed during the cutting of slabs of continuous casting, it would not be departing from the scope of the present invention to apply this method to other operations, such as than the longitudinal slitting or cutting of continuous casting slabs, or to other types of products liable to present burrs of a similar nature.
Exemple :Example:
Elimination des bavures d'oxycoupage à la sortie de la machine de coulée continue (tronçonnage du brin (continu) en brames) . Juste avant la zone d'action des chalumeaux, une rampe commandée par le calculateur de la machine de coupe projette sur la face inférieure des zones de coupe une très fine couche d'une substance thermiquement isolante, ayant des propriétés d'adhérence à chaud à la calamine de brames, et des propriétés de dilatation différentielle différentes du comportement de l'acier. Cette substance comporte aussi des éléments diffusant dans l' acier liquide pour le fragiliser et empêcher son soudage à la brame. On utilise par exemple un mélange de silice colloïdale, de graphite et de vermiculite. On procède alors à la coupe au moyen des chalumeaux. La bavure se forme sur la couche déposée. On refroidit ensuite la bavure au moyen de rampes d'aspersion disposées à la sortie de la zone de coupe.Elimination of oxygen cutting burrs at the outlet of the continuous casting machine (cutting of the strand (continuous) in slabs). Just before the zone of action of the torches, a ramp controlled by the computer of the cutting machine projects on the underside of the cutting zones a very thin layer of a thermally insulating substance, having properties of adhesion when hot slab scale, and differential expansion properties different from the behavior of steel. This substance also has diffusing elements in the liquid steel to weaken it and prevent it from being welded to the slab. For example, a mixture of colloidal silica, graphite and vermiculite is used. The cutting is then carried out using the torches. The burr forms on the deposited layer. The burr is then cooled by means of spray bars arranged at the outlet of the cutting zone.
La bavure reçoit un.choc thermique et se contracte. La couche déposée se contracte également, mais différemment, car sa composition est étudiée pour favoriser la contraction différentielle qui conduit au cisaillement de l'interface bavure - couche. De plus, la couche déposée adhère moins bien à la brame à basse température. Enfin, l'acier contenu dans la bavure a été fra gilisé par diffusion locale du carbone émanant de la couche : il n'est soudé que très médiocrement aux coulées d'acier qui subsistent dans la saignée de coupe. La conjugaison de tous ces effets minimise l'adhérence de la bavure à la brame. Un raclage sommaire suffit pour l'enlever en laissant un bord de coupe net. The burr receives a thermal shock and contracts. The deposited layer also contracts, but differently, because its composition is studied to favor the differential contraction which leads to the shearing of the burr - layer interface. In addition, the deposited layer adheres less well to the slab at low temperature. Finally, the steel contained in the burr was fra gilised by local diffusion of the carbon emanating from the layer: it is only very poorly welded to the steel flows which remain in the cutting groove. The combination of all these effects minimizes the adhesion of the burr to the slab. A summary scraping is enough to remove it leaving a clean cutting edge.

Claims

Revendications.. Claims ..
1. Procédé d' oxycoupage de produits métalliques, en particulier de brames de coulée continue, donnant lieu à la formation d'une bavure, caractérisé en ce que l'on crée une surface de séparation entre la dite bavure et la surface du produit.1. A method of flame cutting metallic products, in particular slabs of continuous casting, giving rise to the formation of a burr, characterized in that a separation surface is created between said burr and the surface of the product.
2. Procédé suivant la revendication 1, caractérisé en ce que l'on soumet la dite bavure, de préférence dès qu'elle est solidifiée, à un refroidissement brusque au moyen d'au moins un jet d'un agent réfrigérant.2. Method according to claim 1, characterized in that said burr is subjected, preferably as soon as it is solidified, to sudden cooling by means of at least one jet of a refrigerant.
3. Procédé suivant la revendication 2, caractérisé en ce que l'agent réfrigérant est un liquide, de préférence l'eau.3. Method according to claim 2, characterized in that the cooling agent is a liquid, preferably water.
4. Procédé suivant l'une ou l'autre des revendications 1 à 3, caractérisé en ce que l'on dépose sur la face du dit produit, de préférence uniquement dans les zones où doit être pratiqué l' oxycoupage, un matériau contrariant ou empêchant l'adhérence de la bavure à la dite face.4. Method according to any one of claims 1 to 3, characterized in that one deposits on the face of said product, preferably only in the areas where must be practiced flame cutting, a contrarian material or preventing the adhesion of the burr to said face.
5. Procédé suivant la revendication 4, caractérisé en ce que l'on dépose sur la dite face un matériau carboné.5. Method according to claim 4, characterized in that a carbonaceous material is deposited on said face.
6. Procédé suivant la revendication 4, caractérisé en ce que l'on dépose sur la dite face, préalablement au dépôt d'une substance antiadhérente, une couche d'une matière constituant une barrière thermique entre la dite face et la substance antiadhérente.6. Method according to claim 4, characterized in that is deposited on said face, prior to the deposition of a non-stick substance, a layer of a material constituting a thermal barrier between said face and the non-stick substance.
7. Procédé suivant la revendication 4, caractérisé en ce que l'on applique sur la dite face une plaque, de préférence métallique, sur laquelle la bavure se dépose, et en ce que l'on enlève ensuite la dite plaque portant la bavure. 7. Method according to claim 4, characterized in that one applies to said face a plate, preferably metallic, on which the burr is deposited, and in that one then removes said plate carrying the burr.
8. Procédé suivant l' une ou l' autre des revendications 1 à 7, caractérisé en ce que l' on détache la bavure de la dite face, en lui appliquant un choc mécanique .8. Method according to one or the other of claims 1 to 7, characterized in that one detaches the burr from said face, applying a mechanical shock to it.
EP19840900957 1983-03-09 1984-03-08 Improvements to processes for torch cutting metal products Pending EP0135554A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE6047790 1983-03-09
BE6047790 1983-03-09

Publications (1)

Publication Number Publication Date
EP0135554A1 true EP0135554A1 (en) 1985-04-03

Family

ID=3874920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840900957 Pending EP0135554A1 (en) 1983-03-09 1984-03-08 Improvements to processes for torch cutting metal products

Country Status (2)

Country Link
EP (1) EP0135554A1 (en)
WO (1) WO1984003465A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5556678A (en) * 1991-07-25 1996-09-17 Cebal Sa Plastics tube head provided with a lining having a barrier effect and an internal member which can be used for this lining

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5510195A (en) * 1991-03-01 1996-04-23 Nikko Kogyo Kabushiki Kaisha Resin membrane having metallic layer and method of producing the same
CN102990514A (en) * 2012-12-06 2013-03-27 无锡透平叶片有限公司 Method for cutting flashes of blade forged piece

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541344A (en) * 1947-12-30 1951-02-13 Air Reduction Method of facilitating the removal of beads that adhere to ferrous metal cut thermochemically
US3486744A (en) * 1968-01-02 1969-12-30 Caterpillar Tractor Co Flame cutting installation with fluid flow waste removal means
US3787247A (en) * 1972-04-06 1974-01-22 Hypertherm Inc Water-scrubber cutting table
GB1427177A (en) * 1973-05-16 1976-03-10 Caterpillar Tractor Co Waste removal
DE2831152A1 (en) * 1978-07-15 1980-01-24 Ipu Ltd Flame cut continuously cast billets or slabs - where slag beard formed during flame cutting is melted and blown away by gas burners
DE2925419A1 (en) * 1979-06-23 1981-01-08 Ipu Ltd Flame cutting of continuous castings - with simultaneous removal of slag beards via streams of gas supplied by nozzles moving synchronously with flame cutting burner
DE2943539A1 (en) * 1979-10-27 1981-05-07 I.P.U. Ltd., Nassau Flame cutting of continuous castings etc. - where jets of high pressure oxygen are used to remove slag beards formed during cutting
US4329187A (en) * 1979-12-29 1982-05-11 Nippon Speng Co., Ltd. Apparatus and method for cutting continuous metal sheet by melting portion thereof and trimming end of cut sheet
DE3019691A1 (en) * 1980-05-23 1981-12-03 I.P.U. Ltd., Nassau Removing slag beams from continuously cast slabs etc. - by flame de-seaming burners directing streams of fuel gas and oxygen onto edges of cut slabs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8403465A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5556678A (en) * 1991-07-25 1996-09-17 Cebal Sa Plastics tube head provided with a lining having a barrier effect and an internal member which can be used for this lining

Also Published As

Publication number Publication date
WO1984003465A1 (en) 1984-09-13

Similar Documents

Publication Publication Date Title
EP0304654B1 (en) Process for welding a groove machined in a massive steel work piece, and use of this process to repair a fissured rotor
EP2240291B1 (en) Device for feeding gas to a wave brazing or tinning machine
EP0135554A1 (en) Improvements to processes for torch cutting metal products
BE1006267A3 (en) Treatment surface refractaires.
FR2522552A1 (en) METHOD OF HORIZONTALLY CONTINUOUS CASTING OF METALS, IN PARTICULAR LIGHT ALLOYS, AND INSTALLATION FOR ITS IMPLEMENTATION
BE896117A (en) Flash removal from rolling slabs - produced by oxygen cutting continuously cast metal strands
FR2724337A1 (en) System for cooling material to be machined
CN113814602B (en) Production method and special equipment of sandwich composite brazing filler metal for hard alloy brazing
CN101333637A (en) Process for repairing continuous casting crystal roller
CN1083742C (en) Composite shearing blade for shearing hot steel billet and its producing method
EP1628786B1 (en) Method for separating cropped layers from plated strips by roll bonding
JP2011036880A (en) Scarfing device
EP0670190A1 (en) Foundry mould and process for making it
EP0033270B1 (en) Method of cutting a metal or a metal-alloy wall by splitting
BE900314A (en) Oxy-acetylene cutting of metal blooms - with torch followed by oxygen jet to prevent burr formation
EP0172800A2 (en) Oxygen cutting method for a metal product
FR2559692A1 (en) Method for preparing stratified metallic semi-finished products, particularly made from steel, and device for implementing this
SU1224101A1 (en) Method of continuous production of bimetallic workpieces
FR2666756A1 (en) CYLINDER FOR THE CONTINUOUS CASTING OF METAL STRIPS BETWEEN TWO CYLINDERS, PARTICULARLY STEEL, AND METHOD FOR MANUFACTURING THE SAME.
KR930007665B1 (en) Surface treatment of welding sputtering accessible member
Dubrovskii et al. Electric resistance surfacing with a wire and with melting of the metals to be joined
BE894887A (en) Oxygen cutting of metals, esp. continuously cast slabs - with continuous removal of flash during cutting, esp. by compressed air jets blowing flash off cut edges
Hashim et al. Brazing Remedy for Solidification Cracking During Copper to Aluminum Welding
JPS5828701Y2 (en) Fusing slag removal equipment
YAZAR et al. The Use of Cu-W Sinters in MIG-MAG Welding Contact Tips for Improved Continuous Wire Abrasion Performance

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT DE FR GB LU NL

17P Request for examination filed

Effective date: 19850226

17Q First examination report despatched

Effective date: 19860410

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

RIN1 Information on inventor provided before grant (corrected)

Inventor name: D'HAEYER, RAYMOND