DE881354C - Process for quenching and tempering alloyed and unalloyed steels with hypoeutectoid composition - Google Patents

Process for quenching and tempering alloyed and unalloyed steels with hypoeutectoid composition

Info

Publication number
DE881354C
DE881354C DEO789D DEO0000789D DE881354C DE 881354 C DE881354 C DE 881354C DE O789 D DEO789 D DE O789D DE O0000789 D DEO0000789 D DE O0000789D DE 881354 C DE881354 C DE 881354C
Authority
DE
Germany
Prior art keywords
tempering
quenching
alloyed
temperatures
steel
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
DEO789D
Other languages
German (de)
Inventor
Otto Dr Kukla
Wolfgang Dr Kuentscher
Hugo Sajosch
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 DEO789D priority Critical patent/DE881354C/en
Application granted granted Critical
Publication of DE881354C publication Critical patent/DE881354C/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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium

Description

Verfahren zum Vergüten von legierten und unlegierten Stählen untereutektoider Zusammensetzung Bisher war es üblich, die Zähigkeit von Stählen für Tieftemperaturen durch besondere Schmeliverfahren, Legierung, Wärmebehandlung (Vergütung), Diffusionsglühung und Anlaßstoßglühung zu erhöhen. Es wurde nun gefunden, daß gegenüber üblicher Vergütung die Zähigkeit der Stähle bei Tieftemperaturen und dynamischer Beanspruchung merkbar verbessert wird, wenn der Stahl nicht wie bisher von Temperaturen über Ac. gehärtet, sondern aus Temperaturgebieten zwischen Ac, und Ac, abgeschreckt wird. Eine ähnliche Wirkung wurde gefunden, wenn der Stahl, von hohen Temperaturen kommend, sei es nun bei der üb- lichen Vergütung oder Walz- oder Schmiedehärtung, aus Temperaturen, die zwischen Ar, und Ar, liegen, abgeschreckt wird.Process for quenching and tempering alloyed and unalloyed steels with hypoeutectoid composition Up to now it has been customary to increase the toughness of steels for low temperatures by special smelting processes, alloying, heat treatment (quenching and tempering), diffusion annealing and impact annealing. It has now been found that the toughness of the steels at low temperatures and dynamic loading is noticeably improved compared to conventional tempering if the steel is not subjected to temperatures above Ac as before. hardened, but rather quenched from temperature ranges between Ac, and Ac,. A similar effect was found when the steel, coming from high temperatures, be it with the usual tempering or rolling or forging hardening, is quenched from temperatures between Ar and Ar.

Beispiel Ein Stahl mit folgender chemischer Zusammensetzung: # O#; 1- Mn si P S V'Jül 0,35 bis 0,45 1,6 bis 1,9 0,40 wie üblich o,i bis o,2 in der Abmessung 5o mm o wurde üblicherweise von 82o' C (über Ac.) in Wasser gehärtet und bei 69o' C 30 Minuten angelassen sowie in Wasser abgekühlt. Die hierbei erreichten Kerbschlagzähigkeitswerte bei - 30, - 45 und_6o' betrugen 5 bis 9 mkg/cm2 (Probeabmessung von DVM), wobei die niedrigeren Kerbschlagzähigkeitswerte der tieferen Prüftemperatur zuzuordnen sind.Example A steel with the following chemical composition: # O #; 1- Mn si PS V'Jül 0.35 to 0.45 1.6 to 1.9 0.40 as usual o, i to o, 2 in the dimension 50 mm o was usually hardened at 82 ° C (above Ac.) in water and tempered at 69 ° C for 30 minutes and cooled in water. The notched impact strength values achieved here at - 30, - 45 und_6o 'were 5 to 9 mkg / cm2 (sample dimension of DVM), wherein the lower notched impact strength values of the lower test temperature are attributable.

Wurde nun der Stahl nicht über Ac, sondern in Temperaturgebieten zwischen Ac, und Ac, z. B. von 74o bis 76o', unter den gleichen Bedingungen wie oben angeführt gehärtet und anschließend bei 69o' 3o Minuten angelassen, so wurden Kerbschlagzähigkeitswerte gefunden, die zwischen 8 und 1:3 mkg/cnil lagen.If the steel was not made above Ac, but in temperature ranges between Ac, and Ac, e.g. B. from 74o to 76o ', hardened under the same conditions as mentioned above and then tempered at 69o' 30 minutes, notched impact strength values were found which were between 8 and 1: 3 mkg / cnil.

Die gleichen Zähigkeitswerte wurden bei Tieftemperaturen erreicht, wenn der Stahl auf Temperaturen über Ac, erwärmt, z. B. 82o', anschließend auf Temperaturen zwischen Ar, und Arl abgekühlt und dann abgeschreckt wurde. Die Kerbschla'gz914keitswerte ergaben unter den gleichen Anlaßbedingungen wie oben Werte von 7 bis ii mkg/cm2.The same toughness values were achieved at cryogenic temperatures when the steel was heated to temperatures above Ac, e.g. B. 82o ', then cooled to temperatures between Ar, and Arl and then quenched. Under the same tempering conditions as above, the notch impact strength values gave values of 7 to 11 mkg / cm2.

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zur Erhöhung der Zähigkeitswerte bei Raum- und Tieftemperaturen durch Vergüten von legierten und unlegierten Stählen untereutektoider Zusammensetzung, insbesondere mit schlagartiger'Beanspruchung, dadurch gekennzeichnet daß der Stahl auf Temperaturen zwischen Ac, und Ac, erwärmt, in Wasser, Öl, Luft oder Warmbad abgeschreckt und dann in bekannter Weise angelassen wird. PATENT CLAIMS: i. Process for increasing the toughness values at room and low temperatures by quenching and tempering alloyed and unalloyed steels with hypoeutectoid composition, in particular with sudden stress, characterized in that the steel is heated to temperatures between Ac and Ac, quenched in water, oil, air or a hot bath and then started in a known manner. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß der Stahl auf Temperaturen über Ac, erwärmt, auf Temperaturen zwischen Ar, und Ar, abgekühlt, dann in Wasser, Öl, Luft oder Warmbad abgeschreckt und anschließend in bekannter Weise angelassen wird.2. The method according to claim i, characterized in that the steel is heated to temperatures above Ac, cooled to temperatures between Ar and Ar, then quenched in water, oil, air or hot bath and then tempered in a known manner.
DEO789D 1944-07-08 1944-07-08 Process for quenching and tempering alloyed and unalloyed steels with hypoeutectoid composition Expired DE881354C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEO789D DE881354C (en) 1944-07-08 1944-07-08 Process for quenching and tempering alloyed and unalloyed steels with hypoeutectoid composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO789D DE881354C (en) 1944-07-08 1944-07-08 Process for quenching and tempering alloyed and unalloyed steels with hypoeutectoid composition

Publications (1)

Publication Number Publication Date
DE881354C true DE881354C (en) 1953-06-29

Family

ID=7349327

Family Applications (1)

Application Number Title Priority Date Filing Date
DEO789D Expired DE881354C (en) 1944-07-08 1944-07-08 Process for quenching and tempering alloyed and unalloyed steels with hypoeutectoid composition

Country Status (1)

Country Link
DE (1) DE881354C (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

Similar Documents

Publication Publication Date Title
DE881354C (en) Process for quenching and tempering alloyed and unalloyed steels with hypoeutectoid composition
DE3136722C2 (en) Process for the production of valves for internal combustion engines
DE102020208972A1 (en) bearing arrangement
DE940836C (en) Process for the production of thick-walled forgings and rolling mills with increased toughness inside
DE872956C (en) Intermediate quenching of unalloyed and alloyed steels
DE1212306B (en) Age-hardening, corrosion-resistant steel alloy
DE973413C (en) Process to achieve a hardness of at least 54RC with high impact resistance
DE854364C (en) Production of thick-walled steel castings with increased toughness in the core
DE2225517A1 (en) Hypereutectic bearing steel and method of making bearings from it
DE2451182C3 (en) Process for the heat treatment of chromed steel
DE734902C (en) Process for eliminating or avoiding the tempering of nitrided workpieces made of Mo-free steel
DE651165C (en) Process for achieving a high level of resistance to permanent changes in shape
DE102022211254A1 (en) Heat treatment method for a steel product, steel product and bearing ring
DE928651C (en) Process for the production of objects with high quality values from alloyed or unalloyed steels
DE669788C (en) Process for producing a steel with high resistance to hydrogen at elevated temperature and pressure
AT166035B (en) Material for the production of deep-drawn objects
DE730622C (en) Process to achieve high elasticity in chromium-copper-manganese steels
DE1179969B (en) Process for the heat treatment and deformation of steel
DE1225217B (en) Process for increasing the nitriding depth of steel
DE575001C (en) Manufacture of items that require aging protection from low-carbon iron or steel
DE888555C (en) Use of heat-treated steel as a material for the production of deep-drawn objects
DE659831C (en) Structural steel with high strength and yield strength and at the same time high elongation
DE602751C (en) Process for reducing the electrical resistance of aluminum
DE1433822A1 (en) Special process for the heat treatment of steel
DE651846C (en) Manufacture of seamless tubes for high-performance steam boilers