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 goodsInfo
- 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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE905982C (en) * | 1948-10-05 | 1954-03-08 | Deutsche Edelstahlwerke Ag | Purge or blow-off pipes |
-
1949
- 1949-01-01 DE DEP29108A patent/DE945931C/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE905982C (en) * | 1948-10-05 | 1954-03-08 | Deutsche Edelstahlwerke Ag | Purge or blow-off pipes |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2920719C2 (en) | Process for the production of dense, low-alloy sintered parts | |
DE2023064C3 (en) | Process for the production of bearing rings | |
DE945931C (en) | Process for the production of wear-resistant pipes for the hydraulic or pneumatic transport of bulk goods | |
DE1021235B (en) | Forging paste | |
AT266364B (en) | Coating process for working walls of continuous casting molds | |
DE69914240T2 (en) | Process for soft annealing a high-carbon steel | |
DE602373C (en) | Process for the production of wear-resistant pipes | |
DE719151C (en) | Process for the production of highly stressed or specifically light cast bodies | |
DE1228399B (en) | Process for the production of hollow plastic bodies, such as pipes or the like. | |
CH648350A5 (en) | METHOD FOR isothermal austempering OF workpieces made of ferrous materials. | |
DE451203C (en) | Mandrel. Die or the like for pressing a copper pipe placed in or around an iron pipe | |
DE853593C (en) | Procedure for operating pusher ovens | |
DE945930C (en) | Process for the production of wear-resistant pipes for the hydraulic and pneumatic conveying of bulk goods | |
DE638493C (en) | Composite sheet for the production of pipes | |
DE620127C (en) | Method of making hollow metal rods and the like the like, e.g. Hollow steel for rock drill | |
DE973272C (en) | Method and device for hardening and tempering blowing or flushing displacement pipes or conveyor channels | |
DE550491C (en) | Process for the manufacture of rolls | |
DE1092360B (en) | Method for producing bodies from a cement fiber mixture or the like. | |
EP0271696A3 (en) | Process and device for the manufacture of thin-walled hollow bodies made of concentric metal layers | |
DE610365C (en) | Rotary kiln with internals made of chains | |
DE2361330A1 (en) | CYLINDRICAL ROLLER BODIES FOR ROLLER BEARINGS | |
AT105167B (en) | Process for the production of pipes lined with asphalt. | |
DE3005886A1 (en) | Steel tube for transporting solid materials, esp. sand and gravel - where heat treatment is used to form martensite in tube bore, and tough outer zone of ferrite and pearlite | |
AT115617B (en) | Cadmium-containing lead alloy and heat treatment thereof. | |
DE814862C (en) | Manufacture of concrete bodies |