DE945931C - Process for the production of wear-resistant pipes for the hydraulic or pneumatic transport of bulk goods - Google Patents

Process for the production of wear-resistant pipes for the hydraulic or pneumatic transport of bulk goods

Info

Publication number
DE945931C
DE945931C DEP29108A DEP0029108A DE945931C DE 945931 C DE945931 C DE 945931C DE P29108 A DEP29108 A DE P29108A DE P0029108 A DEP0029108 A DE P0029108A DE 945931 C DE945931 C DE 945931C
Authority
DE
Germany
Prior art keywords
fields
pipe
production
wear
hydraulic
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
DEP29108A
Other languages
German (de)
Inventor
Dipl-Ing Hermann Holtey
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.)
GEWERK REUSS
Original Assignee
GEWERK REUSS
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 GEWERK REUSS filed Critical GEWERK REUSS
Priority to DEP29108A priority Critical patent/DE945931C/en
Application granted granted Critical
Publication of DE945931C publication Critical patent/DE945931C/en
Expired legal-status Critical Current

Links

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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/14—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes

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 Articles (AREA)

Description

Verfahren zur Herstellung verschleißfester Rohre für den hydraulischen oder pneumatischen Transport von Schüttgütern Die Erfindung betrifft verschleißfeste, aus härtharem Stahl bestehende Rohre für den hydraulaschen oder pneumatischlen Transport von Schüttgütern.Process for the production of wear-resistant pipes for the hydraulic or pneumatic transport of bulk goods The invention relates to wear-resistant, Hardened steel pipes for hydraulic or pneumatic transport of bulk solids.

Die Erfindung besteht darin, daß an der Arbeitsfläche des Rohrkörpers Felder aus gehärtetem Stahl gebildet sind, die von Feldern aus ungehärtetem Material wie ein Netzwerk umgeben sind. The invention consists in that on the working surface of the tubular body Fields of hardened steel are formed by fields of unhardened material are surrounded like a network.

Die gehärteten Felder können rechteckig oder rautenförmig, kreisförmig oder oval sein oder eine andere geetguete Form besitzen. Vorzugsweise ist die Größe der Felder aus ungehärtetem Stahl kleiner als die der Felder aus gehärtetem Stahl. The hardened fields can be rectangular or diamond-shaped, circular or oval or have some other shape. Preferably the size is the fields made of unhardened steel are smaller than those of the fields made of hardened steel.

Zur Herstellung derartiger Rohre sieht die Erfindung vor, ein aus härtbarem Stahl bestehendes Rohr derart mit einem von einem Kühlmittel durchflossenen Kühisystem, z. B. Kühlrohren, zu umgehen daß Felder der gewünsehten Art durch Kühlhalten während des Erwärmens auf Härtetemperatur abgegrenzt werden. Wird das so erhitze Rohr abgeschreckt, so härten nur die auf Härtetemperatur erhitzten Felder. Es ist auch möglich, das aus härtbarem Stahl bestehende Rohr gleichmäßig auf Härtetemperatur zu erhitzen und erst dann mit dem erwähnten Kühl system zu umgehen. in diesem Falle wird das Rohr zunächst im Bereich des gewinde wirkenden Kühl Systems lang- sam, d h. nicht härtend abgekühlt, während s.chließlich die glühend gebliebenen Felder abgeschreckt werden. Bei größerem Durchmesser der Transportrohre kann. das Kühlsystem auch im- Innern des Rohres angeordnet werden. For the production of such tubes, the invention provides a Hardenable steel existing pipe with a coolant flowing through it Cooling system, e.g. B. cooling pipes to bypass that fields of the desired type by keeping cool be delimited during heating to hardening temperature. Will it heat up like that? If the pipe is quenched, only the fields heated to the hardening temperature harden. It is It is also possible to heat the pipe, which is made of hardenable steel, evenly to hardening temperature to heat and only then to deal with the mentioned cooling system. in this case if the pipe is first long in the area of the thread-acting cooling system sam, i.e. did not cool down while hardening, while finally the glowing fields be deterred. With a larger diameter of the transport pipes. the cooling system can also be arranged inside the pipe.

PATENTANSPROCHE: I. Verschlei,ßfestes Rohr für den hydraulischen oder pneumatischen Transport von Schüftgut, dadurch gekennDeichnlet, daß das aus härtbarem Stahl bestehende Rohr an seiner Arbeitsfläche Felder aus gehärtetem Stahl be-Sitzt, die von Feldern aus nicht gehärtetem Stahl umgehen sind, welche ihrerseits. ineinwander übergehen. PATENT CLAIM: I. Wear, ß-resistant pipe for the hydraulic or pneumatic transport of bulk goods, characterized by the fact that the hardenable steel pipe on its work surface fields made of hardened steel who are bypassed by fields of non-hardened steel, which in turn. merge into one another.

Claims (1)

2. Verfahren zur Herstellung von Rohren nach Anspruch 1, dadurch gekennzeichnet, daß das aus härtbarem Stahl bestehende Rohr mit einem derartigen von einem Kühlmittel durchflossenen Kühlsystem umgeben und mit diesem zusammen erhitzt wird, daß sich durch das Erhitzen über die Ausdehnung des Rohres verteilt Felder von auf Härtetemperatur gebrachtem Stahl abwechselnd mit Feldern von nicht auf Härtetemperatur gebrachtem Stahl ergeben und daß dann das ganze Rohr abgeschreckt wird. 2. A method for the production of pipes according to claim 1, characterized characterized in that the existing hardenable steel pipe with such surrounded by a coolant flowing through the cooling system and heated together with it that by heating over the expansion of the pipe fields are distributed of steel brought to hardening temperature alternating with fields of not hardened temperature brought steel and that the whole pipe is then quenched. 3. Abänderung des Verfahrens nach Anspruch 2, dadurch gekennzeichnet, daß das Kühlsystem mit dem Rohr erst nach dessen Erhitzung auf Härtetemperatur verbunden wird, so daß sich zunächst die im Bereich des Kühlsystems liegenden Felder langsam, d. h. nicht härtend abkühlen, und daß dann die iiber Härtetemperatur gebliebenen Felder abgeschreckt werden. 3. Modification of the method according to claim 2, characterized in that that the cooling system is connected to the pipe only after it has been heated to the hardening temperature so that the fields in the area of the cooling system move slowly, d. H. do not cool down hardening, and that then the temperature remaining above the hardening temperature Fields are deterred. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 905 982. Publications considered: German Patent No. 905 982.
DEP29108A 1949-01-01 1949-01-01 Process for the production of wear-resistant pipes for the hydraulic or pneumatic transport of bulk goods Expired DE945931C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP29108A DE945931C (en) 1949-01-01 1949-01-01 Process for the production of wear-resistant pipes for the hydraulic or pneumatic transport of bulk goods

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP29108A DE945931C (en) 1949-01-01 1949-01-01 Process for the production of wear-resistant pipes for the hydraulic or pneumatic transport of bulk goods

Publications (1)

Publication Number Publication Date
DE945931C true DE945931C (en) 1956-08-09

Family

ID=7371461

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP29108A Expired DE945931C (en) 1949-01-01 1949-01-01 Process for the production of wear-resistant pipes for the hydraulic or pneumatic transport of bulk goods

Country Status (1)

Country Link
DE (1) DE945931C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE905982C (en) * 1948-10-05 1954-03-08 Deutsche Edelstahlwerke Ag Purge or blow-off pipes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE905982C (en) * 1948-10-05 1954-03-08 Deutsche Edelstahlwerke Ag Purge or blow-off pipes

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