EP0008423B1 - Anordnung zur Wärmebehandlung eines länglichen Bleches - Google Patents

Anordnung zur Wärmebehandlung eines länglichen Bleches Download PDF

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Publication number
EP0008423B1
EP0008423B1 EP79102901A EP79102901A EP0008423B1 EP 0008423 B1 EP0008423 B1 EP 0008423B1 EP 79102901 A EP79102901 A EP 79102901A EP 79102901 A EP79102901 A EP 79102901A EP 0008423 B1 EP0008423 B1 EP 0008423B1
Authority
EP
European Patent Office
Prior art keywords
sheet
roll
surrounding
blocs
cooling
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
Application number
EP79102901A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0008423A1 (de
Inventor
Erik Rune Hellman
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.)
Westinghouse Electric Sweden AB
Original Assignee
ASEA Atom 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 ASEA Atom AB filed Critical ASEA Atom AB
Publication of EP0008423A1 publication Critical patent/EP0008423A1/de
Application granted granted Critical
Publication of EP0008423B1 publication Critical patent/EP0008423B1/de
Expired legal-status Critical Current

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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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material

Definitions

  • the present invention relates to an arrangement for the heat treatment of an elongated sheet according to the preamble of claim 1.
  • Such an arrangement is known from US-A-1 624 204.
  • the heating takes place in such a way that electrical resistance elements heat the conveyor rollers for the metal sheets by radiation, which in turn then emit the heat to the metal sheets.
  • a preheating and a cooling zone is provided in the known arrangement, which consists of a plurality of chambers which are formed by baffles and each contain a pair of rollers in which the sheet is preheated or cooled by flowing protective gas. Both the volume of the heating chamber and the volume of the chambers in which the rollers are housed are relatively large, so that a very large amount of protective gas is required to operate the arrangement.
  • a further disadvantage of the known arrangement is that the cooling of the sheet takes place relatively slowly, so that the arrangement is at least unsuitable for easily oxidizable material.
  • a heating of the sheet to a temperature of at least 800 ° C and a subsequent rapid cooling is necessary, for example in such a way that a heated sheet zone is immediately subjected to a temperature reduction of at least 200 ° C within a maximum of 60 seconds.
  • the present invention has for its object to develop an arrangement for heat treatment of the type mentioned, in which the amount of shielding gas required and the consumption of shielding gas is relatively small and at the same time rapid heating and cooling of the sheet is possible.
  • the sheet can be heated to a temperature of at least 900 ° C and cooled immediately to a cooling rate of at least 40 ° C / second to 800 o e and then with a cooling rate of at least 5 ° C / second. Thanks to the small volume of the heating chamber and thanks to the volume of the spaces in which the rollers are housed, which is only slightly larger in relation to the roller volume, only a small amount of protective gas is required to operate the arrangement according to the invention. The protective gas is practically not used as the flowing coolant.
  • the low protective gas volume of the arrangement is particularly advantageous because, even when the arrangement is briefly shut down, the protective gas escapes through the unavoidable stomata or mixes with air, so that it must be fully replaced when restarting.
  • the arrangement shown in the figures is largely encapsulated in a substantially parallelepiped-shaped stand, which has a base plate 1, a cover plate 2, two side plates 3 and 4 and two end plates 5 and 6 contains, each with a horizontal gap 7 or 8 for on slide or is provided for removing the sheet transported through the arrangement.
  • Each of the side plates 3 and 4 has bushings for twelve shaft journals, which belong to six pairs of rollers.
  • the shaft journals passing through the side plates 3 are designated 9 ', 9 ", 10', 10", 11 ', 11 ", 12', 12", 13 ', 13 ", 14', 14" (see FIG.
  • Each roll encasing block has an inner, not closed, circular cylinder surface, the radius of which is somewhat larger than the radius of the enclosed roll and which limits a roll pocket 49 directed towards the belt (see FIGS. 4 and 5), in which a roll is arranged in such a way that that a gap 49 'is formed between the roller and the cylindrical surface of the roller pocket 49.
  • Each roller shaft journal passing through the side plates 3 and 4 carries a ball bearing which is mounted in a corresponding bearing block L9 ', L9 ", L10', L10” etc.
  • the bearing blocks on the side plate 4 are designed and arranged in exactly the same way as the bearing blocks on the side plate 3.
  • Each bearing block has a circular-cylindrical guide cam which bears against the cylindrical inner surface at the associated end of a roll-enclosing block without any play and which, together with this, limits the roll pocket 49.
  • a fixation of each roll enclosing block in relation to the associated bearing blocks is achieved.
  • the lower bearing blocks L9 ', L10' etc. are fixed to the side plates 3 and 4 of the tripod.
  • the upper bearing blocks are suspended in the cover plate 2 of the tripod with the aid of a resilient arrangement acting downwards, which can be adjusted with the aid of adjusting screws 15 and 16.
  • the spring force is so low that there is no reduction in the thickness of the sheet running through the pairs of rollers.
  • the heat treatment arrangement shown in the figures contains an elongated treatment space 17, which extends between the entry gap 7 and the exit gap 8, through which the sheet 18 to be treated runs.
  • the treatment room 17 is delimited at the top by inner and outer surfaces of the upper enclosing blocks B9 “, B10", B12 “, B13", B14 ".
  • the delimiting downwards is carried out accordingly by the lower enclosing blocks and bearing blocks.
  • the treatment room 17 becomes partly limited by the bearing blocks and partly by the side plates 3 and 4.
  • the treatment room 17 is always closed in the vicinity of the entry gap and the exit gap, since the rolls of the pairs of rolls located there are in direct connection with each other or with one side of the sheet 18 to be treated .
  • a heating chamber 19 belonging to the treatment room 17 is formed , in which a heating coil, which is connected to a high-frequency generator and is designed with directly cooled conductors, is arranged in the transverse direction of the treatment room in such a way that the sheet 18 made of one piece or strip, which is conveyed between the rollers, flows through the magnetic field of the coil and thereby being heated by induced currents.
  • a cooling fluid e.g.
  • Water is supplied to an inner cooling channel running in the longitudinal direction of the coil via an inlet pipe 20 'and leaves the channel through an outlet pipe 21'.
  • the upper side of the coil is designated 20 and the lower side 21.
  • the heating coil is fixed in a central position in the heating chamber 19, specifically by means of four coil supports 22 provided with electrical insulation for the upper coil side 20, each of which passes through a corresponding hole 23 in the enclosing block B11 ", and by means of four provided with electrical insulation, the upper coil supports directly opposite and attached to the coil side 21 coil supports 24 for the lower coil side 21, each of which passes through a corresponding hole 25 in the lower enclosing block B11 '.
  • the distance of the coil support ends from the center plane through the treatment room 17 can be individually adjusted A number of adjusting screws 26 and 27 can be set, which are attached in the cover plate 2 and in the base plate 1.
  • adjusting screws 26 and 27 can be set, which are attached in the cover plate 2 and in the base plate 1.
  • the sheet temperature can be measured with the aid of pyrometers, which are arranged gas-tight in through holes 28 provided in the enclosing block B11 '. If only some of the holes 28 are provided with pyrometers, the remaining holes are closed.
  • Each of the holes 28 corresponds to a hole in the cover plate 2, not shown in the figures, which is either closed or contains a gas-tight bushing for a pyrometer.
  • the heating chamber 19 is connected to an inlet chamber 29 on the side wall 3 for a protective gas, e.g. B. argon, and on the side wall 4 in connection with an outlet chamber 30 (Fig. 7).
  • a protective gas e.g. B. argon
  • the connection between the inlet chamber 29 and the heating chamber takes place via several inlet openings 31, and the connection between the heating chamber and the outlet chamber 30 takes place via several outlet openings 32, the total flow cross-section of the inlet openings 31 being significantly larger than that of the outlet openings 32.
  • the outlet chamber 30 can expediently also be used as the inlet chamber, the gas consumption becoming relatively small.
  • the heating chamber 19 is cooled with the aid of four cooling channels 51, 52, 53 and 54, which are formed in the adjacent roll enclosing blocks and through which cooling water flows in the longitudinal direction of the heating chamber.
  • These cooling channels are created in that corresponding grooves which run parallel to the longitudinal direction of the rolls and are directed towards the heating chamber are each made in a roll enclosing block and are closed with the aid of copper plates 51 ', 52', 53 ', 54' which each belong to a roll enclosing block and are attached to this by brazing.
  • Each of the four dash-dotted lines 33 shown in FIG. 1 indicates the position of a pair of coil supports 22, 24.
  • Each roller encasing block is provided on the inside with preferably more than six outlet openings 34 (FIG. 5) for protective gas directed towards the enclosed roller, which exit from an elongated distribution channel 35 which is connected to a plurality of inlet openings 36 for protective gas.
  • Each of the inlet openings 36 is connected to a gas pipe, which gas pipes are tightly guided through their respective opening 37 in the upper cover plate 2 or in the lower base plate 1.
  • the roll enclosing blocks B11 'and B11 "are each provided with two essentially ring-shaped seals, as a result of which the space between the blocks and the roll is divided into three axially successive subspaces. These are individually provided with protective gas via their respective inlet opening 36 and their respective distribution channel , wherein the cooling effect of the protective gas on the sheet 18 can be varied along the length of the roller.
  • Each roll enclosing block is provided with two cooling channels 38 and 39 (FIG. 5) running in the longitudinal direction of the block, the ends of which are connected to substantially vertical inlet channels 40 and outlet channels 41 for cooling water connected to pipes.
  • the channels 40 and 41 are either connected to water pipes 42, which are guided with a seal through openings 43 in the cover plate 2 or the base plate 1, or they are connected to water pipes 44, which are provided for the series connection of the two cooling channels 38 and 39 in a roll enclosing block are.
  • At least the roller surfaces of the pair of rollers which are closest to the heating coil in the transport direction must be water-cooled.
  • rollers are preferably water-cooled. In the embodiment shown in the figures, all the roller pairs are water-cooled, except for the one that is closest to the entry nip 7.
  • the water-cooled rollers can be designed in the manner shown in FIGS. 6 and 8.
  • the roller shown in the figures consists of an essentially cylindrical core 45, at the ends of which a circular cylindrical body 46 is welded in such a way that a circular cylindrical cooling water space 47 is formed between the core 45 and the circular cylindrical body.
  • the core 45 is provided with two shaft journals 11 "and 11" ', each of which has an inlet channel for cooling water 55 and 56, respectively.
  • each shaft journal has two outlet channels 57 and 58.
  • the roller therefore has two separate cooling circuits.
  • the flow directions are indicated in Fig. 6 for one cooling circuit by solid arrows and for the other cooling circuit by dashed arrows.
  • Each of the inlet channels 55 and 56 is divided into three branches 55 'and 56', which open into the circular cylindrical cooling water chamber 47 at the central part of the roller.
  • One cooling circuit mainly cools only the left half of the roller, the other cooling circuit mainly only cools the right half of the roller.
  • the rollers have chain drive and are equipped with a common drive motor.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Articles (AREA)
  • General Induction Heating (AREA)
EP79102901A 1978-08-22 1979-08-10 Anordnung zur Wärmebehandlung eines länglichen Bleches Expired EP0008423B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7808831A SE420218B (sv) 1978-08-22 1978-08-22 Anordning for vermebehandling av en langstreckt plat
SE7808831 1978-08-22

Publications (2)

Publication Number Publication Date
EP0008423A1 EP0008423A1 (de) 1980-03-05
EP0008423B1 true EP0008423B1 (de) 1982-12-22

Family

ID=20335627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79102901A Expired EP0008423B1 (de) 1978-08-22 1979-08-10 Anordnung zur Wärmebehandlung eines länglichen Bleches

Country Status (7)

Country Link
US (1) US4241903A (es)
EP (1) EP0008423B1 (es)
JP (1) JPS5528398A (es)
DE (1) DE2964355D1 (es)
ES (1) ES8101128A1 (es)
FI (1) FI68666C (es)
SE (1) SE420218B (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0206601A1 (en) * 1985-06-10 1986-12-30 Slidex Corporation Propulsion apparatus for displaying a model
DE10215118C1 (de) * 2002-04-05 2003-06-12 Rainer Menge Anordnung zum Kühlen wärmebehandelter Drähte
JP5626956B2 (ja) * 2009-10-22 2014-11-19 日本碍子株式会社 析出硬化型合金薄帯の製造装置、冷却ロール及び析出硬化型合金薄帯の製造方法
US8512629B2 (en) * 2010-01-18 2013-08-20 General Electric Company System and method for annealing alloy steel components

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1624204A (en) * 1925-06-06 1927-04-12 Thaddeus F Baily Annealing machine
US2293873A (en) * 1941-05-22 1942-08-25 Gen Motors Corp Annealing apparatus
DE890804C (de) * 1942-08-25 1953-09-21 Westfalenhuette Dortmund Ag Verfahren und Vorrichtung zum Haerten und Vergueten von Metallbaendern und -blechen
US2529690A (en) * 1945-06-29 1950-11-14 Selas Corp Of America Heating apparatus
US2806130A (en) * 1955-11-03 1957-09-10 Western Electric Co Strand annealing apparatus
US3109044A (en) * 1959-07-07 1963-10-29 Crucible Steel Co America Heat treating apparatus
NL7602275A (nl) * 1975-03-14 1976-09-16 Asea Atom Ab Werkwijze voor een corrosiewerende behandeling van zirkoonlegering.

Also Published As

Publication number Publication date
FI792572A (fi) 1980-02-23
JPS5528398A (en) 1980-02-28
ES483545A0 (es) 1980-12-01
ES8101128A1 (es) 1980-12-01
SE420218B (sv) 1981-09-21
JPS5732089B2 (es) 1982-07-08
SE7808831L (sv) 1980-02-23
DE2964355D1 (en) 1983-01-27
FI68666B (fi) 1985-06-28
EP0008423A1 (de) 1980-03-05
US4241903A (en) 1980-12-30
FI68666C (fi) 1985-10-10

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