DE601241C - Procedure for avoiding high stress levels when hardening armor plates on one side - Google Patents

Procedure for avoiding high stress levels when hardening armor plates on one side

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Publication number
DE601241C
DE601241C DEK125445D DEK0125445D DE601241C DE 601241 C DE601241 C DE 601241C DE K125445 D DEK125445 D DE K125445D DE K0125445 D DEK0125445 D DE K0125445D DE 601241 C DE601241 C DE 601241C
Authority
DE
Germany
Prior art keywords
hardening
armor plates
procedure
high stress
stress levels
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
DEK125445D
Other languages
German (de)
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.)
Krupp Stahl AG
Original Assignee
Krupp Stahl AG
Publication date
Priority to DEK125445D priority Critical patent/DE601241C/en
Application granted granted Critical
Publication of DE601241C publication Critical patent/DE601241C/en
Expired legal-status Critical Current

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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
    • C21D9/42—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for armour plate

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)
  • Laminated Bodies (AREA)

Description

Verfahren zur Vermeidung großer Härtespannungen beim einseitigen Härten von Panzerplatten Es ist bekannt, bei Dampfüberhitzern die den heißen Gasen zugekehrten Flächen durch Aussparungen gegen Temperaturschwankungen widerstandsfähig zu machen. Ferner ist es bekannt, bei der Zementation von Eisen und Stahl die vor der Zementation zu schützenden Stellen durch Lehm oder ähnliche Stoffe abzudecken.Process for avoiding large hardening stresses when hardening on one side of armor plates It is known that steam superheaters face the hot gases To make surfaces resistant to temperature fluctuations through recesses. It is also known, in the cementation of iron and steel, before cementation to cover areas to be protected with clay or similar materials.

Bei einseitig gehärteten Panzerplatten hat sich der Übelstand herausgestellt, daß sie sich infolge der einseitigen-Härtung in einem Zustand hoher Spannung befinden. Dieser Spannungszustand äußert sich einerseits in einem Verbiegen der Platte beim Härten, dem durch entsprechendes Vorbiegen der Platte in entgegengesetzter Richtung Rechnung getragen werden muß, und anderseits in einer Verringerung der Widerstandsfähigkeit der Panzerplatte gegen auftreffende Geschosse.In the case of armor plates hardened on one side, the problem has turned out to be that they are in a state of high stress due to the one-sided hardening. This state of tension manifests itself on the one hand in a bending of the plate during Hardening by pre-bending the plate in the opposite direction Must be taken into account, and on the other hand in a reduction in resistance the armor plate against impacting projectiles.

Den Gegenstand der Erfindung bildet ein Verfahren zur Vermeidung großer Härtespannungen beim einseitigen Härten von Panzerplatten, bei welchem die Panzerplatten auf der zu härtenden Seite mit Vertiefungen versehen werden.The subject of the invention is a method for avoiding large Hardness stresses when hardening armor plates on one side, in which the armor plates be provided with indentations on the side to be hardened.

Abb. i zeigt als Ausführungsbeispiel des Erfindungsgegenstandes eine erfindungsgemäß zu härtende Panzerplatte im Querschnitt. A ist die zu härtende Seite der Panzerplatte, in die Schlitze A1 eingefräst sind. Die Abb. 2 und 3 zeigen je eine Draufsicht einer jerfindungsgemäß mit Vertiefungen versehenen Panzerplatte. Bei der Platte nach Abb. 2 treffen sich die auf der gehärteten Seite befindlichen Schlitze A2 unter rechten Winkeln, während sich bei der in Abb. 3 dargestellten Platte die Schlitze A3 unter spitzen bzw. stumpfen Winkeln schneiden, so daß die Platte in rautenförmige Felder eingeteilt ist. Die Schlitze A1, A2, A3 werden zweckmäßig, wie in Abb. i dargestellt, am unteren Ende gut abgerundet. Die Tiefe der Schlitze richtet sich nach der Dicke der Panzerplatte, nach der Zusammensetzung der verwendeten Stahllegierung und nach der Dicke der gehärteten Schicht; sie kann beispielsweise etwa ein Drittel der Plattendicke betragen. Beim Härten der Panzerplatten werden die Rillen z. B. mit Lehm verschmiert, so daß in den Schlitzen keine, Härtung eintritt und die in der gehärteten Schicht erzeugten Spannungen durch die Schlitze ausgeglichen ,werden. An die Stelle der Schlitze können auch entsprechend angeordnete Bohrungen treten, die ebenfalls das Entstehen großer Härtespannungen verhindern.As an embodiment of the subject matter of the invention, FIG. 1 shows an armor plate to be hardened according to the invention in cross section. A is the side of the armor plate to be hardened, in which slots A1 are milled. Figs. 2 and 3 each show a top view of an armor plate provided with depressions according to the invention. In the plate according to Fig. 2 the slots A2 on the hardened side meet at right angles, while in the plate shown in Fig. 3 the slots A3 intersect at acute or obtuse angles, so that the plate is divided into diamond-shaped fields is. The slots A1, A2, A3 are expediently well rounded at the lower end, as shown in Fig. I. The depth of the slots depends on the thickness of the armor plate, the composition of the steel alloy used and the thickness of the hardened layer; it can for example be about a third of the plate thickness. When hardening the armor plates, the grooves are z. B. smeared with clay so that no hardening occurs in the slots and the tensions generated in the hardened layer are balanced by the slots. In place of the slots, appropriately arranged bores can also be used, which likewise prevent the occurrence of large hardness stresses.

Die vorliegende Erfindung bezieht sich sowohl auf zementierte als auch auf nicht zementierte, einseitig gehärtete Panzerplatten.The present invention relates to both cemented and also on non-cemented armor plates hardened on one side.

Claims (3)

PATENTANSPRÜCHE: i. Verfahren zur Vermeidung großer Härtespannungen beim einseitigen Härten von Panzerplatten, dadurch gekennzeichnet, daß die Panzerplatten auf der zu härtenden Seite mit Vertiefungen versehen werden. PATENT CLAIMS: i. Procedure for avoiding large hardening stresses when hardening armor plates on one side, characterized in that the armor plates be provided with indentations on the side to be hardened. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die Vertiefungen aus sich kreuzenden Schlitzen bestehen. 2. The method according to claim i, characterized in that the depressions consist of intersecting slots. 3. Verfahren nach Anspruch i und 2, dadurch gekennzeichnet, daß die Vertiefungen bei der Wärmebehandlung der Panzerplatten z. B. durch Verschmieren mit Lehm gegen die Härtung geschützt werden.3. The method according to claim i and 2, characterized in that the depressions in the heat treatment of armor plates z. B. by smearing with clay against the hardening are protected.
DEK125445D Procedure for avoiding high stress levels when hardening armor plates on one side Expired DE601241C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK125445D DE601241C (en) Procedure for avoiding high stress levels when hardening armor plates on one side

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK125445D DE601241C (en) Procedure for avoiding high stress levels when hardening armor plates on one side

Publications (1)

Publication Number Publication Date
DE601241C true DE601241C (en) 1934-08-10

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Family Applications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403564A1 (en) * 1988-03-01 1990-12-27 General Dynamics Land Systems, Inc. Method of producing case-hardened plate armor
DE19855557C1 (en) * 1998-12-02 2000-04-13 Alexander Esser Production of a wear plate used in conveying and storage apparatus comprises dividing the covering layer into several flat segments after joining the covering layer to the base layer and hardening the covering layer
NL1013819C2 (en) * 1999-12-10 2001-06-12 Alexander Esser Slide plate with hardened metal surface divided into rectangular segments by lattice of grooves

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403564A1 (en) * 1988-03-01 1990-12-27 General Dynamics Land Systems, Inc. Method of producing case-hardened plate armor
EP0403564A4 (en) * 1988-03-01 1991-03-13 General Dynamics Land Systems, Inc. Case-hardened plate armor
DE19855557C1 (en) * 1998-12-02 2000-04-13 Alexander Esser Production of a wear plate used in conveying and storage apparatus comprises dividing the covering layer into several flat segments after joining the covering layer to the base layer and hardening the covering layer
NL1013819C2 (en) * 1999-12-10 2001-06-12 Alexander Esser Slide plate with hardened metal surface divided into rectangular segments by lattice of grooves

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