US3865640A - Method for thermal treatment of rings consisting of wire or strip material - Google Patents

Method for thermal treatment of rings consisting of wire or strip material Download PDF

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Publication number
US3865640A
US3865640A US309748A US30974872A US3865640A US 3865640 A US3865640 A US 3865640A US 309748 A US309748 A US 309748A US 30974872 A US30974872 A US 30974872A US 3865640 A US3865640 A US 3865640A
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United States
Prior art keywords
rings
thermal treatment
wire
ring
oscillations
Prior art date
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Expired - Lifetime
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US309748A
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English (en)
Inventor
Hans Eberhard Mobius
Jakob Kubini
Sorayapour Soraya
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Individual
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Individual
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Priority claimed from DE19712158459 external-priority patent/DE2158459C3/de
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Publication of US3865640A publication Critical patent/US3865640A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/023—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes by immersion in a bath
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/24—Transferring coils to or from winding apparatus or to or from operative position therein; Preventing uncoiling during transfer
    • B21C47/242—Devices for swinging the coil from horizontal to vertical, or vice versa
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
    • 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
    • C21D1/62—Quenching devices
    • C21D1/63—Quenching devices for bath quenching
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F3/00—Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons
    • 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
    • C21D1/34—Methods of heating
    • C21D1/44—Methods of heating in heat-treatment baths
    • C21D1/50—Oil baths

Definitions

  • An apparatus for carrying out this method comprises a pivotable hook for receiving the rings;
  • At least one oscillating generator connected to the hooks
  • means to subject the rings to a radial flow including a pipe system and a cover positioned on the side of the ring which faces away from the hook;
  • the invention relates to a method for thermal treatment of rings of wire or strip material, and to devices for carrying out such method.
  • the thermal treatment of wire is carried out in various ways.
  • it is known to move wire in the form of strands through a furnace, harden it in a connected cooling path and temper it in a further furnace (German Pat. No. No. 951,725).
  • Such a process of continuous movement is customary, e.g., for prestressed concrete wires and requires a high expenditure in capital and in continuous operating cost.
  • An object of the invention is to provide a possibility of thermally treating wire or strips in the shape of rings, paiticularly rings of fairly high weight.
  • the medium surrounding the article to be treated is pressed radially through the ring. Thereby the heat transfer coefficient is raised.
  • Another object of the invention is to provide a thermal treatment of rings of wire or strip material of a fairly high weight, including heavy rings or rings combined to bunches weighing, e.g., 1,000 kg or more with great uniformity.
  • Yet another object of the invention is to provide by the method stated a simple and inexpensive production of the subject articles.
  • Still another object of the invention is to produce the articles, e.g., steel wire. of a lower temper brittleness than is achieved by conventional methods.
  • FIG. 1 is a schematic diagram of the apparatus of the invention
  • FIG. 2 is a diagram similar to that of FIG. 1 showing additional optional processing
  • FIG. 3 is a flow diagram of the sequence of steps employed.
  • the described type of intense heat exchange between the ring of wire or strip material and the surrounding medium is important, e.g., in the hardening in an oil or water bath.
  • the method can also be used in a thermal treatment in the range of medium temperatures which require the employment of hot oil baths, salt baths, or of a fluidized bed. Examples thereof are the intermediate stage tempering of steels, the hot precipiation of non-ferrous metals, and the patenting of rope wire.
  • the method can also be used when the surrounding medium is gaseous and when it is important that the thermal treatment be carried out with particular uniformity and speed.
  • the support of the ring of wire carried out oscillations of an amplitude of 3 mm and frequency of 25 cycles. I000 cubic meter/per hour of oil were pumped through the ring of wire in one of the variants of the experiment. Then the hardness was measured at various cross sections of the ring.
  • the hardness HV3O fluctuated between 280 and 550 kp/square mm.
  • the hardness fluctuated between 400 and 550 kp/square mm.
  • the wire was subsequently tempered, so that a tensile strength of kp/square mm resulted.
  • the fluctuating range of the tensile strength after this tempering amounted to i 1.5 kp/sqare mm.
  • FIGS. 1 and 2 show devices for carrying out the method.
  • a hook I is provided which can be pivoted, e.g., between the rollers of a roller bed 2 (shown in dash lines). There, hook 1 receives the ring of wire or strip material 3 to be treated, after a partial element of roller bed 2 has been moved laterally. Then hook I pivots downwards and the ring is submerged in a container 4 which is filled, e.g., with steel-hardening oil.
  • a container 4 which is filled, e.g., with steel-hardening oil.
  • imbalance motors 5 By means of one or more imbalance motors 5, ring 3 is induced to natural oscillations. Springs 6 serve to absorb the oscillations in bearings 7. To induce ring 3 to natural oscillations, the frequency of the imbalance motors must be chosen in such a way that it is within the range of natural frequency of the oscillatory article,
  • a ring 3 wound from wire or strip material is an oscillatory system which has no single natural frequency, but positively a natural frequency range.
  • the frequency of the oscillation generators (imbalance motors 5) must therefore range within the wide resonance curve of ring 3, so that at least a portion of ring 3 oscillates in resonance.
  • the oscillation generators may also be, e.g., magnetic vibrators whose amplitude and possibly frequency can be adapted to the type and quality of the article. For instance, the natural frequency of rings of wire with a smaller wire diameter and larger winding diameter is lower. When the natural frequencies of the individual oscillatory elements differ very widely, it is advantageous to pass through an entire frequency range continuously and possibly repeatedly, in order to induce successively the various elements of the article to oscillate.
  • Ring 3 is subjected to radial flow by means of a pipe system 8 in which a pump 9 is provided.
  • Hook 1 after immersion (position shown in the drawing) in container 4 abuts against an aperture of pipe system 8.
  • pump 9 an oil circulation in the manner indicated by arrows is forced when ring 3, on the side facing away from hook I, is closed by a cover 10.
  • Numeral 17 indicates the oil or water feeding pipe by which the oil or water necessary to be flown through the ring is supplied.
  • FIG. 2 can likewise be employed if the rings are to be processed further in a fluidized bed or furnace.
  • the fluid media to which the articles are exposed may be gaseous, liquid or solid, or combinations thereof and may be f.i. the same as described in the German Auslegeschrift No. 1,696,320.
  • oscillations employed also may be the same, f.i. as those employed in treatment of rings, wire or strip material in chemically active media as described in the cited Auslegeschrift No. 1,696,320.
  • Method of uniform thermal treatment of a plurality of rings of wire or strip material including heavy rings and in bunches weighing up to l.000 kgs or more comprising the steps of exposing the rings to a fluid medium, and inducing in the article to be treated directional oscillations of natural frequencies of said rings to vary the locations of the adjacent rings and provide openings between them, while they are subjected to a heat-exchange fluidmedium to circulate through the said openings.
  • Method for thermal treatment as claimed in claim 1, further comprising the step of adjusting the frequency of the oscillations to correspond to the upper and lower limits of the natural frequency range of the article to be treated.
  • Method for thermal treatement as claimed in claim 1 further comprising the step of directing a flow of said medium in radial direction through the said rings.
  • Method for thermal treatment as claimed in claim 1, further comprising the step of austempering said materials at about 850 to 900 C prior to said step of exposing;
  • Method for thermal treatment as claimed in claim 4, further comprising the step of tempering said materials to a tensile strength of about kp/mm 6.
  • Method for thermal treatment as claimed in claim 4, further comprising the step of processing said materials in a fluidized bed.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Articles (AREA)
US309748A 1971-11-25 1972-11-27 Method for thermal treatment of rings consisting of wire or strip material Expired - Lifetime US3865640A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712158459 DE2158459C3 (de) 1971-11-25 Vorrichtung zum Wärmebehandeln von zu Ringen gehaspeltem Draht

Publications (1)

Publication Number Publication Date
US3865640A true US3865640A (en) 1975-02-11

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US309748A Expired - Lifetime US3865640A (en) 1971-11-25 1972-11-27 Method for thermal treatment of rings consisting of wire or strip material

Country Status (6)

Country Link
US (1) US3865640A (it)
BE (1) BE791171A (it)
FR (1) FR2160841B1 (it)
IT (1) IT971093B (it)
LU (1) LU66395A1 (it)
NL (1) NL176279C (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4402757A (en) * 1980-02-18 1983-09-06 Kobe Steel, Limited Method of vibrating coiled wires
WO2023148771A1 (en) * 2022-02-03 2023-08-10 Hindalco Industries Limited Apparatus for cooling of hot rolled sheet coils

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2830153C2 (de) * 1978-07-08 1984-02-09 ARBED Saarstahl GmbH, 6620 Völklingen Verfahren und Vorrichtung zum Wärmebehandeln von zu Ringen gehaspeltem Draht oder Band
DE3050265A1 (de) * 1980-02-13 1982-04-15 Vnii Pi Otschistke Gazov Furnace for heating articles

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424794A (en) * 1941-12-05 1947-07-29 Rca Corp Surface hardening of ferrous metal by self-quenching
US2798832A (en) * 1954-03-08 1957-07-09 Richard F Harvey Method of hardening ferrous metals
US2848775A (en) * 1953-09-17 1958-08-26 Etma S A Method of controlling the properties of metals and metal alloys by irradiation with vibrations
US3276918A (en) * 1963-06-11 1966-10-04 Langenecker Bertwin Method for strengthening metals
US3284192A (en) * 1963-01-22 1966-11-08 Gen Motors Corp Method of determining graphite shapes in nodular iron
US3449163A (en) * 1965-02-10 1969-06-10 Hans Eberhard Mobius Process for pickling bundled materials
US3622404A (en) * 1969-02-19 1971-11-23 Leonard E Thompson Method and apparatus for stress relieving a workpiece by vibration

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424794A (en) * 1941-12-05 1947-07-29 Rca Corp Surface hardening of ferrous metal by self-quenching
US2848775A (en) * 1953-09-17 1958-08-26 Etma S A Method of controlling the properties of metals and metal alloys by irradiation with vibrations
US2798832A (en) * 1954-03-08 1957-07-09 Richard F Harvey Method of hardening ferrous metals
US3284192A (en) * 1963-01-22 1966-11-08 Gen Motors Corp Method of determining graphite shapes in nodular iron
US3276918A (en) * 1963-06-11 1966-10-04 Langenecker Bertwin Method for strengthening metals
US3449163A (en) * 1965-02-10 1969-06-10 Hans Eberhard Mobius Process for pickling bundled materials
US3622404A (en) * 1969-02-19 1971-11-23 Leonard E Thompson Method and apparatus for stress relieving a workpiece by vibration

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4402757A (en) * 1980-02-18 1983-09-06 Kobe Steel, Limited Method of vibrating coiled wires
WO2023148771A1 (en) * 2022-02-03 2023-08-10 Hindalco Industries Limited Apparatus for cooling of hot rolled sheet coils

Also Published As

Publication number Publication date
FR2160841B1 (it) 1976-08-20
DE2158459A1 (de) 1975-02-27
LU66395A1 (it) 1973-01-23
IT971093B (it) 1974-04-30
NL176279C (nl) 1985-03-18
BE791171A (fr) 1973-03-01
FR2160841A1 (it) 1973-07-06
DE2158459B2 (de) 1977-01-20
NL7214877A (it) 1973-05-29

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