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  • 1
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: A review of the devolopment and the properties of nitrogen containing austenitic steels for chemical apparatus constructionAddition of nitrogen results in increased strength austenitic steels and in increased austenite stability, so that the formation of undesirable phases is suppressed or at least delayed. This feature eliminates in particular the Structural stability problems encountered during welding. The increase of mechanical strength involves qualitatively all the properties related to strength, including fatigue strength and corrosion fatigue strength; it should be noted that this improvement has not been achieved at the expense of ductility, so that the steels are suitable for low temperature application as well. For these reasons it is recommended to include nitrogen alloyed steels in standardization projects.
    Notes: En alliant des aciers austénitiques au nitrogène, on peut augmenter la résistance mécanique des ariers et Clever la stabilité de l'austénite, de façn que la formation de phases non désirables est supprimée ou au moins décélérée. Cela permet de largement éliminer les problèes se manifestant au cours du soudage en connection avec la stabilité structurelle. L'augmentation de la résistance mécanique concerne toutes les propriétés mécaniques, y comprise la résistance à la fatigue et la fatigue à la corrosion. Cette amélioration n'a pas été atteint au dépens de la ductilité, fait qui permet l'utilisation de ces aciers également aux températures assez basses. Sur la base de cette évidence on recommande que les aciers alliés ai nitrogène se fassent objets de la normalisation.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 27 (1976), S. 701-705 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Influence of an ultimate heat treatment of the mechanical properties and the corrosion behaviour of stainless steelsUnfavorable structures as may arise during steel processing and may impair their behaviour can be eliminated by an ultimate heat treatment. Cold hardening can be removed by heating to about 1000°C for about 1 min; dissolution of chromium carbide precipitated requires 3 min at 1030°C and dissolution of sigma phase about 10 min at 1050°C. The treatment, however, will not be successful, unless the temperatures mentioned are achieved throughout the whole workpiece and a sufficiently high colling rate is maintained after the treatment.
    Notes: Ungünstige Gefügezustände, die bei der Verarbeitung von Stählen entstehen und deren Verhalten beeinträchtigen können, lassen sich durch nachträgliche Wärmebehandlung beseitigen. Eine Kaltverfestigung kann durch Glühen bei etwa 1000°C bei einer Haltezeit von etwa 1 min weitgehend beseitigt werden; Auflösung von Chromcarbidausscheidungen erfordert etwa 3 min Haltezeit bei 1030 °C und Auflösung der Sigma-Phase etwa 10 min Haltezeit bei 1050°C. Voraussetzung für den Erfolg ist, daß die genannten Temperaturen im gesamten Werkstück erreicht werden und daß die Abkühlung nach der Wärmebehandlung ausreichend rasch erfolgt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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