US3858859A - Process and tank for the patenting of metal wires - Google Patents

Process and tank for the patenting of metal wires Download PDF

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Publication number
US3858859A
US3858859A US321414A US32141473A US3858859A US 3858859 A US3858859 A US 3858859A US 321414 A US321414 A US 321414A US 32141473 A US32141473 A US 32141473A US 3858859 A US3858859 A US 3858859A
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US
United States
Prior art keywords
tank
wire
lead
head portion
ridge
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
US321414A
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English (en)
Inventor
Paul Baguet
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.)
D'ETUDES ET DE PARTICIPATIONS INDUSTRIELLES Cie
PARTICIPATIONS IND COMP D ET
Original Assignee
PARTICIPATIONS IND COMP D ET
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
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    • 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
    • C21D1/84—Controlled slow cooling
    • 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
    • C21D1/48—Metal baths
    • 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
    • C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
    • 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
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5732—Continuous furnaces for strip or wire with cooling of wires; of rods

Definitions

  • ABSTRACT [30] Foreign Application Priority Data A wire is cooled while in motion by immersing the Jan. 6, 1972 Luxembourg 64560 We in a PFC-Cooled molten lead which flows in the same direction in a lead bath as the moving wire.
  • the wire which has attained a substantially uniform temperature over its en- 5 References Cited tire core section, is then subjected to structural trans- UNITED STATES PATENTS formation in another zone of the lead bath at substantially uniform temperature.
  • 2,556,349 6/1951 Trautman 266/3 R X 1 2,716,079 8/1955 Wick et al 266/3 R X 6 Claims, 5 Drawing Figures PROCESS AND TANK FOR THE PATENTING OF METAL WIRES DESCRIPTION OF THE PRIOR ART It is known that patenting consists of cooling in a lead bath a wire which has been previously brought to a high temperature. During this operation, the austenite constituting the metal decomposes and gives rise to a precipitation of pearlite.
  • Double Cascade Quench in which the wire is caused to pass through two salt baths at different temperatures, the purpose of the first bath being to cool the wire rapidly, while in the second bath the wire is gradually reheated, the latter stage of which has the purpose of enabling the structural transformation of the metal to take place at approximately uniform temperature (about 500C).
  • This known process is very complicated and its use is difficult to control when the wires have different diameters.
  • salts nitrates and nitrites
  • the process according to this invention like the conventional process, uses a lead bath which avoids any corrosion but in contrast to the arrangements of this conventional process, and in order to obviate its inherent inadequacies it provides a sequence of operations conceived with the purpose of making uniform the temperature of the cross-section of the wire before the structural transformation commences, which is the essential object of patenting.
  • the wire is cooled while in motion by immersing it in a stream of molten lead which has been previously cooled and which surrounds it all over and of which the direction of outflow coincides with the direction of progress of the wire.
  • the wire is maintained at a substantially uniform temperature by complete immersion of the wire in a lead bath receiving the aforesaid stream and reheated, in normal operation, by the calories given off by the wire,
  • the wire which has reached a substantially uniform temperature over its entire cross-section, is subjected to the structural transformation stage in another zone of same lead bath at substantially uniform temperature.
  • the patenting tank utilised to carry out this process is characterised essentially in that it comprises, at the side from which the hot wire arrives, a head portion separated from the rest of the tank by a partition, preferably heat-insulated, a lead pump located in the tank at the side where the patented wires leave it, and a pump delivery pipe discharging into the head portion of the tank.
  • the stream of lead whose direction of outflow coincides with the direction of progress of the wire penetrating into the tank, is obtained by discharging the relatively cold lead contained in the head portion of the tank over the upper ridge of the partition separating the head portion fromthe rest of the tank.
  • FIG. 1 is a longitudinal section of the patenting tank in accordance with the invention:
  • FIG. 2 is a plan view from above of said tank, from which there have been removed the wire lead-in guides and the guide members which hold the wires in the patenting tank;
  • FIG. 3 is a cross-section of a wire guide
  • FIG. 4 is a partial view in elevation of a wire guide, viewed in the direction of the arrow F in FIG. 3, and
  • FIG. 5 is a graph of the variations in the temperature of the wire as a function of time, for the purpose of ex plaining the phenomena.
  • FIGS. 1 and 2 represent a patenting tank generally designated by l, in which there is found the known arrangement for cooling the tank head (left-hand part of drawings); the tank is surrounded at the inlet by a cooling casing comprising a transverse chamber 2 connected to two lateral chambers 3 which extend externally along the tank up to partitions S.
  • a fan 6 forces air into the chamber 2, from where the air passes into the lateral chambers 3 to finally escape from the latter through adjustable apertures 4.
  • the essentially novel arrangements of the tank comprise a vertical partition 7 which is heat-insulated (extended in the described embodiment by a wall 7a).
  • the outlet of the tube I4 into the chamber 13 I takes place near a deflector 17 arranged so as to impart
  • the partition 7 is formed by a panel provided with lifting lugs such as 7b sliding between pairs of flanges, one of which is fixed to the partition 11, the other to the lateral opposite wall of the tank. It is thus possible to interchange the panels 7 and adjust the height of their ridge 70 in relation to the bottom of the tank, according to the required conditions.
  • the wall 10 of the chamber 2 carries supports 18 behind which a wire guide 19 is positioned, said guide being visible in greater detail in FIGS. 3 and 4.
  • the wire guide 19 comprises a body 20 having on its upper surface teeth 21 between which there are situated grooves 22.
  • the wire 23 passes along the bottom of these grooves.
  • the body 20 of the wire guide is extended by a support butt 24 and by a stem 25, the two latter elements being bevelled-off so as to apply against the wall 10.
  • the stem 25 of the wire guide is immersed into the mass of liquid lead contained in the tank 8 and thus imparts to the bottom of the grooves 22 a temperature near that of the lead contained in the tank portion 8.
  • the pump discharges the relatively cool lead, taken from the outlet end of the tank, into the chamber 13 from where the cold lead passes into the first portion, called the head portion 8 of the tank.
  • the lead level rises in this portion until a flow of molten lead is caused above the ridge 70 of the partition 7. It is into the stream of cold lead, which passes above this overflow element, that the wire 23 passes in the same direction before plunging into the bath contained in the portion 9 of the tank.
  • the cooling method for the wire is explained as follows: the wire heated in a furnace (not shown, situated to the left in FIG. 1 of the tank 1) firstly passes between the teeth of the wire guide 19.
  • the mass of wire is altogether at a temperature T of about 950C for example, substantially corresponding to the maximum temperature attained by the wire on emerging from the furnace.
  • the wire then arrives in the stream of lead which flows from the portion 8 to the portion 9 of the tank.
  • the lead accompanies the wire and cools it until imparting to it a surface temperature T, lower than the temperature T (near to 500C for example) considered favourable for patenting.
  • the passage of the wire from temperature T to temperature T corresponds to a reheating of the wire which takes place between the ridge 70 and the guide member 26.
  • a wire patenting tank comprising:
  • said tank having a head portion positioned at a location in the tank at which a hot wire enters the tank;
  • a partition means for separating said head portion from a second portion of the tank
  • a lead pump positioned in the second portion of said tank near a side thereof from which a patented wire leaves the tank;
  • the tank of claim 1 including a cooling coil immersed in the lead bath in the head portion of said tank.
  • the tank includes a wire guide positioned at a side of the tank at which the hot wire enters the tank, said guide formed by a metal body having a comb shape, said wire passing along the bottom of the grooves of said comb shaped body, a stem comprising heat well immersed in the head portion of the tank below a plane of a free surface of the relatively cool lead which occupies said portion of the tank.

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)
  • Coating With Molten Metal (AREA)
US321414A 1972-01-06 1973-01-05 Process and tank for the patenting of metal wires Expired - Lifetime US3858859A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU64560 1972-01-06

Publications (1)

Publication Number Publication Date
US3858859A true US3858859A (en) 1975-01-07

Family

ID=19726915

Family Applications (1)

Application Number Title Priority Date Filing Date
US321414A Expired - Lifetime US3858859A (en) 1972-01-06 1973-01-05 Process and tank for the patenting of metal wires

Country Status (7)

Country Link
US (1) US3858859A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE793716A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2300315A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2166375B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1385301A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT973067B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
LU (1) LU64560A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4249720A (en) * 1978-07-03 1981-02-10 Trefilarbed S.A. Apparatus for the continuous treatment of metal objects
US4944174A (en) * 1987-04-21 1990-07-31 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Process for cooling heated material
US5215702A (en) * 1989-05-10 1993-06-01 N.V. Bekaert S.A. Avoiding lead drag-out during patenting

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2339674A1 (fr) * 1976-01-30 1977-08-26 December 4 Drotmuevek Installation de patentage avec circulation de metal fondu
DE3535453A1 (de) * 1985-10-04 1987-04-09 Berg Ag Verfahren zum patentieren von draht im durchlauf und vorrichtung zur durchfuehrung des verfahrens

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556349A (en) * 1945-04-30 1951-06-12 Oscar C Trautman Apparatus for heat-treating wire and the like
US2716079A (en) * 1949-10-11 1955-08-23 Bethlehem Steel Corp Heat treatment of metal
US3277270A (en) * 1965-04-09 1966-10-04 Oscar C Trautman Continuous heat treating of strapping and the like

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556349A (en) * 1945-04-30 1951-06-12 Oscar C Trautman Apparatus for heat-treating wire and the like
US2716079A (en) * 1949-10-11 1955-08-23 Bethlehem Steel Corp Heat treatment of metal
US3277270A (en) * 1965-04-09 1966-10-04 Oscar C Trautman Continuous heat treating of strapping and the like

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4249720A (en) * 1978-07-03 1981-02-10 Trefilarbed S.A. Apparatus for the continuous treatment of metal objects
US4944174A (en) * 1987-04-21 1990-07-31 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Process for cooling heated material
US5215702A (en) * 1989-05-10 1993-06-01 N.V. Bekaert S.A. Avoiding lead drag-out during patenting

Also Published As

Publication number Publication date
BE793716A (fr) 1973-07-05
GB1385301A (en) 1975-02-26
IT973067B (it) 1974-06-10
DE2300315A1 (de) 1973-07-12
FR2166375B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-03-18
LU64560A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-07-16
FR2166375A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-08-17

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