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DE2405427B2 - METHOD OF MANUFACTURING HIGH FREQUENCY WELDED PIPES - Google Patents

METHOD OF MANUFACTURING HIGH FREQUENCY WELDED PIPES

Info

Publication number
DE2405427B2
DE2405427B2 DE19742405427 DE2405427A DE2405427B2 DE 2405427 B2 DE2405427 B2 DE 2405427B2 DE 19742405427 DE19742405427 DE 19742405427 DE 2405427 A DE2405427 A DE 2405427A DE 2405427 B2 DE2405427 B2 DE 2405427B2
Authority
DE
Germany
Prior art keywords
heat treatment
welded pipes
tubes
frequency welded
high frequency
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
DE19742405427
Other languages
German (de)
Other versions
DE2405427A1 (en
DE2405427C3 (en
Inventor
Werner 4330 Mülheim; Wilke Werner 5757 Wickede Friehe
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.)
Vodafone GmbH
Original Assignee
Mannesmannroehren Werke AG
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 Mannesmannroehren Werke AG filed Critical Mannesmannroehren Werke AG
Priority to DE19742405427 priority Critical patent/DE2405427C3/en
Priority claimed from DE19742405427 external-priority patent/DE2405427C3/en
Priority to FR7503182A priority patent/FR2259655A1/en
Priority to SE7501040A priority patent/SE7501040L/xx
Publication of DE2405427A1 publication Critical patent/DE2405427A1/en
Publication of DE2405427B2 publication Critical patent/DE2405427B2/en
Application granted granted Critical
Publication of DE2405427C3 publication Critical patent/DE2405427C3/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/09—Making tubes with welded or soldered seams of coated strip material ; Making multi-wall tubes
    • 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
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0807—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D65/00—Designing, manufacturing, e.g. assembling, facilitating disassembly, or structurally modifying motor vehicles or trailers, not otherwise provided for
    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Combustion & Propulsion (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Heat Treatment Of Articles (AREA)
  • Coating With Molten Metal (AREA)

Description

Die Erfindung betrifft ein Verfahren nach dem Oberbegriff des Anspruchs I.The invention relates to a method according to the preamble of claim I.

Bisher wurden für den Chassisbau von Kraftfahrzeugen vorzugsweise HF-geschweißte Rechteckrohre in tormalgeglühter Ausführung verwendet. Der erforderliche Korrosionsschutz wurde durch Außenanstrich erzielt Ein Schutz gegen die Hohlraumkorrosion unterblieb in den meisten Fällen. Aus verzinktem Band gefertigte Rohre konnten wegen der notwendigen Normalisierungsglühung, bei deren Temperatur das Zink verdampfte bzw. verbrannte, nicht angewendet werden.Up to now, HF-welded rectangular tubes in normalized version used. The required corrosion protection was provided by painting the exterior Achieved protection against cavity corrosion was omitted in most cases. Made of galvanized tape Due to the necessary normalization annealing, at the temperature of which the Zinc evaporated or burned, not used.

Aufgabe der Erfindung ist es, ein Verfahren zu schaffen, mit dem <8e Herstellung von korrosionsbeständigen Chassisronren für den Bau von Kraftfahrzeugen, insbesondere Rechteckrohren für den Autobusbau in wirtschaftlicher Weise möglich wird.The object of the invention is to provide a method create, with the <8e manufacture of corrosion-resistant Chassis runners for the construction of motor vehicles, in particular rectangular tubes for bus construction becomes economically feasible.

Zur Lösung dieser Aufgabe wird erfindungsgemäß das im Kennzeichen des Anspruchs I Erfaßte vorgeschlagen. Die Wärmebehandlung erfolgt vorteilhafterweise, nachdem der äußere Nahtbereich im Anschluß an ίο das Außenentgraten in bekannter Weise mit Zinkdraht oder vergleichbaren Materialien nachgespritzt wurde.In order to achieve this object, what is covered in the characterizing part of claim I is proposed according to the invention. The heat treatment is advantageously carried out after the outer seam area has followed ίο the external deburring was sprayed in the known manner with zinc wire or comparable materials.

Durch die erfindungsgemäße Wärmehehandlung wird der Zinküberzug in eine Eisen-Zink-Legierungsphase überführt, die in ihrer Korrosionsschutzwirkung is der ursprünglichen Verzinkung gleichwertig oder gar überlegen ist Gleichzeitig bewirkt die Wärmebehandlung in wünschenswerter Weise einen Abbau der Kaltverfestigung aus der Rohrherstellung, die dieses Rohr für die Weiterverarbeitung besonders geeignet macht Auch ist der entstehende Oberflächenzustand für Anstriche besonders geeignet.The heat treatment according to the invention turns the zinc coating into an iron-zinc alloy phase transferred, which in its anti-corrosive effect is equivalent or even to the original galvanizing is superior. At the same time, the heat treatment desirably degrades the Work hardening from pipe production, which makes this pipe particularly suitable for further processing The resulting surface condition is also particularly suitable for painting.

Der lnnenschweißgrat ist zinkfrei. Der Korrosionsschutz ist durch die Fernschutzwirkung des Zinks auf der Innenfläche gegeben. Zudem stellt der Nahtwulst eine Korrosionsschutzreserve dar.The inner weld burr is zinc-free. The corrosion protection is given by the remote protective effect of the zinc on the inner surface. In addition, the seam bead represents represents a corrosion protection reserve.

Durch das erfindungsgemäße Verfahren wird die Lebensdauer der Chassisrohre, die als tragende Elemente im Automobilbau besondere Bedeutung haben, gegenüber den bisher zur Anwendung gekornmenen, normalisierend geglühten Rohren ohne Innenkorrosionsschutz wesentlich erhöhtThe inventive method, the life of the chassis tubes, which are used as a load-bearing Elements in automotive engineering are of particular importance compared to the previously used, normalizing annealed pipes without internal corrosion protection are significantly increased

Untersuchungen haben bewiesen, daß die mechanischen Eigenschaften und das Schweißverhalten bei den erfindungbgeinäß behandelten Rohren problemlos sind.Investigations have proven that the mechanical properties and the welding behavior in the According to the invention treated pipes are problem-free.

Claims (2)

Patentansprüche:Patent claims: L Verfahren zur Her^elluag von hochfrequenzgeschweißten Rohren aus sendzimierverzinktem Spaltband, die nach dem Schweißen einer Wärmebehandlung unterzogen werden, die als Chassisrohre für den Bau von Kraftfahrzeugen, insbesondere Vierkantrohren für den Autobusbau verwendet werden, dadurch gekennzeichnet, daß die Wärmebehandlung zwei bis drei Minuten lang im Durchlaufofen bei 600 bis 650° C erfolgtL Process for the manufacture of high-frequency welded Pipes made from sendzimir galvanized split strip, which are subjected to heat treatment after welding used as chassis tubes for the construction of motor vehicles, in particular Square tubes are used for bus construction, characterized in that the Heat treatment takes place for two to three minutes in a continuous furnace at 600 to 650 ° C 2. Verfahren nach Anspruch I, bei dem der äußere Nahtbereich der Rohre entgratet wird, dadurch gekennzeichnet, daß dieser Nahtbereich vor der Wärmebehandlung in bekannter Weise mit Zinkdrahtoder vergleichbaren Materialien nachgespritzt wird.2. The method according to claim I, wherein the outer seam area of the tubes is deburred, thereby characterized that this seam area before the heat treatment in a known manner with zinc wire or comparable materials is re-sprayed.
DE19742405427 1974-02-01 1974-02-01 Process for the production of high frequency welded pipes Expired DE2405427C3 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19742405427 DE2405427C3 (en) 1974-02-01 Process for the production of high frequency welded pipes
FR7503182A FR2259655A1 (en) 1974-02-01 1975-01-27 Mfr of zinc-coated welded tube - esp for bus chassis, given stress-relieving heat-treatment after welding
SE7501040A SE7501040L (en) 1974-02-01 1975-01-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742405427 DE2405427C3 (en) 1974-02-01 Process for the production of high frequency welded pipes

Publications (3)

Publication Number Publication Date
DE2405427A1 DE2405427A1 (en) 1975-08-21
DE2405427B2 true DE2405427B2 (en) 1977-03-03
DE2405427C3 DE2405427C3 (en) 1977-10-20

Family

ID=

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3630625A1 (en) * 1986-09-09 1988-03-17 Benteler Werke Ag Method for the production of an internally galvanised pipe (tube)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3630625A1 (en) * 1986-09-09 1988-03-17 Benteler Werke Ag Method for the production of an internally galvanised pipe (tube)

Also Published As

Publication number Publication date
SE7501040L (en) 1975-08-04
FR2259655A1 (en) 1975-08-29
DE2405427A1 (en) 1975-08-21
FR2259655B3 (en) 1977-10-21

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)