DE926074C - Use of steels treated according to patent 753198 - Google Patents

Use of steels treated according to patent 753198

Info

Publication number
DE926074C
DE926074C DEO1024D DEO0001024D DE926074C DE 926074 C DE926074 C DE 926074C DE O1024 D DEO1024 D DE O1024D DE O0001024 D DEO0001024 D DE O0001024D DE 926074 C DE926074 C DE 926074C
Authority
DE
Germany
Prior art keywords
steels
resistant
treated according
temperatures
aging
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
DEO1024D
Other languages
German (de)
Inventor
Wolfgang Dr-Ing Kuentscher
Otto Dr-Ing Kukla
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.)
OBERHUETTEN VEREINIGTE OBERSCH
Original Assignee
OBERHUETTEN VEREINIGTE OBERSCH
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 OBERHUETTEN VEREINIGTE OBERSCH filed Critical OBERHUETTEN VEREINIGTE OBERSCH
Priority to DEO1024D priority Critical patent/DE926074C/en
Application granted granted Critical
Publication of DE926074C publication Critical patent/DE926074C/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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment

Description

Verwendung von nach Patent 753198 behandelten Stählen Die Herstellung alterungsbeständiger und gegen interkristalline Korrosion widerstandsfähiger Stähle geschieht entweder unter Anwendung einer besonders weitgehenden Desoxydation, beispiels-@veise durch Aluminium, oder durch das Hinzulegieren besonders kräftiger Karbidbil@dner und schließlich auch durch besondere Wärmebehandlungsmaßnahme.n (Sondervergütung). Alle diese Verfahren wirken nicht nur verteuernd, sondern auch häufig störend auf den Betrieb. Demgegenüber ergab sich aus einer Reihe von Beobachtungen und Untersuchungen, daß man einen gut alterungsbeständigen und, gegen interkristall.ine Korrosion widerstandsfähigen Stahl erhält, wenn die Endverformung der Stähle bei möglichst niedrigen Temperaturen am oberen Umwandlungspunkt oder kurz oberhalb desselben stattfindet und die Stähle unmittelbar von diesen Endverformungstemperaturen aus in an sich bekannter Weise gehärtet werden. Eine solche Wärmebehandlung ist Gegenstand des Patents 753 198, das auch vorsieht, die aus der EndverformungLstemperatur gehärteten Stähle gegebenenfalls noch anzulassen.Use of steels treated according to patent 753198 The manufacture of aging-resistant steels that are resistant to intergranular corrosion is either carried out using particularly extensive deoxidation, for example using aluminum, or by adding particularly strong carbide formers and finally also using special heat treatment measures. Special remuneration). All of these processes not only make them more expensive, but also often disrupt operations. In contrast, a number of observations and investigations have shown that a steel that is resistant to aging and resistant to intercrystalline corrosion is obtained if the final deformation of the steels takes place at the lowest possible temperatures at the upper transformation point or just above it and the steels directly from this Final deformation temperatures can be cured in a manner known per se. Such a heat treatment is the subject of patent 753 198, which also provides for the steels hardened from the final deformation temperature to be tempered if necessary.

Demgemäß besteht die Erfindung darin., unlegserte oder auch legierte Stähle : mimt einem Kohlenstoffgehalt über o,o6'°/a, die naoh Patent 733 198 von möglichst niedrigen Walz- oder Sehmiedetemp:eraturen am oberen Umwandlungspunkt oder kurz oberhalb desselben in Wasser oder einem anderen Härtemittel abgeschreckt sind und dann noch einer je nach :der Zus-ammensetzung abgestuften üblichen Anlaßglühung bei Temperaturen von etwa Zoo bis 700° C unterworfen werden, für Gegenstände zu verwenden, die bei tiefen Temperaturen eine sehr hohe Kerbschlagzähigkeit und vor allen Dingen eine außerordentlich geringe Alterungsanfälligkent besitzen sollen und dabei widerstandsfähig gegen iinterkristalIine Korrosion (Kesselsalze, Ammonitrat usw.) .sein sollen.Accordingly, the invention consists in, non-alloyed or alloyed Steels: mimt a carbon content above 0.06 '° / a, the naoh patent 733 198 of The lowest possible rolling or boiling temperature at the upper transition point or quenched just above it in water or another hardening agent are and then another, depending on: the composition, graded usual annealing at temperatures of about zoo to 700 ° C for objects too use that have a very high impact strength at low temperatures and above all things should have an extremely low susceptibility to aging and at the same time resistant to inter-crystalline corrosion (boiler salts, ammonitrate etc.). should be.

Claims (2)

PATENTANSPRÜCHE: i. Die Verwendung urilegierter oder legierter Stähle, die nach Patent 753 198 bei möglichst niedrigen Temperaturen am oberen Umwan@dlungspunkt oder kurz oberhalb desselben endverformt und unmittelbar von den: E:ndverformungstempera,turen aus gehärtet s,i.nd, zur Herstellung von Gegenständen, die alterungsbeständig und gegen interkri.stalline Korrosion widerstandsfähig sein sollen. PATENT CLAIMS: i. The use of uralloyed or alloyed steels, that according to patent 753 198 at the lowest possible temperatures at the upper transformation point or just above the same end deformed and immediately from the: E: nd deformation temperatures from hardened s, i.nd, for the production of objects that are resistant to aging and should be resistant to intercrystalline corrosion. 2. D.ie Verwendung von Stählen gemäß Änsprueh i, die jedoch nach der Härtung noch ein. Anlassen bei Zoo bis 700° C erfahren haben, für den Zweck nach Anspruch i.2. The use of steels according to Änsprueh i, which, however, still have a. Starting at Zoo have experienced up to 700 ° C, for the purpose according to claim i.
DEO1024D 1941-10-26 1941-10-26 Use of steels treated according to patent 753198 Expired DE926074C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEO1024D DE926074C (en) 1941-10-26 1941-10-26 Use of steels treated according to patent 753198

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO1024D DE926074C (en) 1941-10-26 1941-10-26 Use of steels treated according to patent 753198

Publications (1)

Publication Number Publication Date
DE926074C true DE926074C (en) 1955-04-04

Family

ID=7349409

Family Applications (1)

Application Number Title Priority Date Filing Date
DEO1024D Expired DE926074C (en) 1941-10-26 1941-10-26 Use of steels treated according to patent 753198

Country Status (1)

Country Link
DE (1) DE926074C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1275559B (en) * 1958-08-25 1968-08-22 Yawata Seitetsu Kabushiki Kais Process for the production of steel with high tensile strength and notched impact strength

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1275559B (en) * 1958-08-25 1968-08-22 Yawata Seitetsu Kabushiki Kais Process for the production of steel with high tensile strength and notched impact strength

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