DE749645C - Process for the heat treatment of caps made of hardenable steel for tank shells or tank projectiles - Google Patents

Process for the heat treatment of caps made of hardenable steel for tank shells or tank projectiles

Info

Publication number
DE749645C
DE749645C DEA89548D DEA0089548D DE749645C DE 749645 C DE749645 C DE 749645C DE A89548 D DEA89548 D DE A89548D DE A0089548 D DEA0089548 D DE A0089548D DE 749645 C DE749645 C DE 749645C
Authority
DE
Germany
Prior art keywords
tank
heat treatment
projectiles
hardenable steel
shells
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
DEA89548D
Other languages
German (de)
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 filed Critical
Application granted granted Critical
Publication of DE749645C publication Critical patent/DE749645C/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
    • C21D9/16—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for explosive shells

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  • 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)
  • Adornments (AREA)
  • Emergency Lowering Means (AREA)

Description

Verfahren zur Wärmebehandlung von aus einem härtbaren Stahl bestehenden Kappen für Panzergranaten oder Panzergeschosse Für Panzergranaten verwendete man bisher Kappen in ausgeglühtem (weich geglühtem) oder zähe vergütetem Zustand, d. h. gehärtet und auf eine Temperatur oberhalb von 500° C nachgelassen.Process for the heat treatment of hardenable steel Caps for tank shells or tank projectiles One used for tank shells Previously caps in an annealed (soft annealed) or tough tempered condition, d. H. hardened and eased to a temperature above 500 ° C.

Mit dem Ausglühen oder Veredeln wurde bezweckt, eine hohe Zähigkeit des Kappeninaterials zu erreichen, da bisher vorausgesetzt worden ist, daß die Zähigkeit die wichtigste Bedingung für die richtige Funktion der Granatenkappen beim Aufschlag auf zementierte Panzer bildet.The purpose of annealing or refining was to achieve a high level of toughness To achieve the cap material, since it was previously assumed that the toughness the most important condition for the correct function of the grenade caps on impact on cemented armor forms.

Das Ergebnis der beschriebenen Wärmebehandlung des Kappenmaterials war ein perlitischer (nach dem Glühen) bzw. sorbitischer (nach der Veredelung) Strukturzustand.The result of the described heat treatment of the cap material was a pearlitic (after annealing) or sorbitic (after refinement) structural state.

Erfindungsgemäß wurde jedoch festgestellt, daß der optimale Strukturzustand des Materials für die erwünschte Wirkung der Panzergranaten oder -geschosse beim Aufschlag auf zementierte Panzer der inartensitische Zustand ist, gleichgültig ob in Form von tetragonalem oder kubischem Martensit. Dieser Gefügezustand wird durch Abschrekken (tetragonäler Martensit) bzw. durch Abschrecken und Nachlassen bei niedrigen Temperaturen maximal bis 300° C (kubischer Martensit) erzielt. Der Gegenstand vorliegender Erfindung ist also genau das Gegenteil des bisherigen Standes der Technik, da die Zähigkeit des Materials im martensitischen Zustand sehr gering ist.According to the invention, however, it was found that the optimal structural state the material for the desired effect of the tank shells or projectiles Impact on cemented armor is inartensitic condition, regardless of whether in the form of tetragonal or cubic martensite. This structural condition is through Quenching (tetragonal martensite) or by quenching and easing at low temperatures Temperatures up to a maximum of 300 ° C (cubic martensite) are achieved. The subject matter at hand Invention is exactly the opposite of the prior art, since the Toughness of the material in the martensitic state is very low.

Das erfindungsgemäße Abschrecken der Kappen wird je nach der Natur des verwendeten Materials entweder von einer oberhalb des kritischen Intervalls, d. 1i. über dem oberen Umwandlungspunkt liegenden Temperatur, oder von einer im kritischen Intervall, d. h. zwischen dem unteren und dein oberen Umwandlungspunkt, liegenden Temperatur durchgeführt.The quenching of the caps according to the invention will depend on the nature the material used either from one above the critical interval, d. 1i. temperature above the upper transition point, or of one in the critical interval, d. H. between the lower and your upper transition point, lying temperature carried out.

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zur Wärmebehandlung von aus einem härtbaren Stahl bestehenden Kappen für Panzergranaten oder Panzergeschosse, dadurch gekennzeichnet, daß durch Abschrecken und gegebenenfalls Anlassen auf eine Temperatur bis höchstens 3oo° ein tetragonal-martensitisches oder kubisch-martensitisches Gefüge erzeugt wird. PATENT CLAIMS: i. Process for the heat treatment of caps made of hardenable steel for tank shells or tank projectiles, characterized in that a tetragonal-martensitic or cubic-martensitic structure is produced by quenching and optionally tempering to a temperature of at most 300 °. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß das Abschrecken im kritischen Intervall, d. h. bei Temperaturen zwischen dem unteren und oberen Umwandlungspunkt, erfolgt. Zur Abgrenzung des Anmeldungsgegenstandes vom Stand der Technik sind im Erteilungsverfahren folgende Druckschriften in Detracht gezogen worden: französische Patentschrift , . 1Tr. Sig 716; Auszug aus dem belgischen Patent 419 573 in »Recueil de Brevets d'Inventiow; (1937), S.130.2. The method according to claim i, characterized in that the quenching in the critical interval, d. H. at temperatures between the lower and upper Conversion point, takes place. To distinguish the subject of the registration from the status of Technology, the following publications are considered in the granting procedure been: French patent specification,. 1Tr. Sig 716; Extract from the Belgian patent 419 573 in “Recueil de Brevets d'Inventiow; (1937), 130.
DEA89548D 1938-06-01 1939-05-18 Process for the heat treatment of caps made of hardenable steel for tank shells or tank projectiles Expired DE749645C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS749645X 1938-06-01

Publications (1)

Publication Number Publication Date
DE749645C true DE749645C (en) 1944-11-28

Family

ID=5455336

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA89548D Expired DE749645C (en) 1938-06-01 1939-05-18 Process for the heat treatment of caps made of hardenable steel for tank shells or tank projectiles

Country Status (1)

Country Link
DE (1) DE749645C (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE419573A (en) *
FR819716A (en) * 1936-03-27 1937-10-26 Arbed Steel for the manufacture of armor-piercing projectiles and its heat treatment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE419573A (en) *
FR819716A (en) * 1936-03-27 1937-10-26 Arbed Steel for the manufacture of armor-piercing projectiles and its heat treatment

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