Quantitative Vollanalyse von Oxydverbindungen mit der Elektronenstrahlmikrosonde. Analyse der Reaktionspartner, Analyse des Sauerstoffs. Ermittlung eines Sauerstoffstandards. Mikrosondenmessungen bekannter Oxydverbindungen. Bestimmung der Massenaisorptionskoeffizienten einiger Elemente. Quantitative Schlackenanalyse.
Carbide segregations in tool steels containing about 1% C. On hypereutectoid tools steels containing about 1.0% C and up to6.0% Cr, 1.0% Mo, 0.5% V and 3.3% W theauthors studied the formation of "quasi-ledeburitic" carbides during the solidification of the residual melt. Effect of the chemical composition and solidification rate on the proportion of surface, arrangement and configuration as uell. as number of the carbides and the'ir cristallographic structure. Elimination of the carbides by solution heat treatment. Discussion, on the background of the experimental results, of the oriqim and size of carbide segregations. Segregations de carbnres dans les aciers it ontil avec environ 1% C. Etude de la formation de carbures «quasiledeburitiques» lors de la solidification de la coulee nfsiduelle d'aciers a outilhypereutectoides, tenant environ1,(J% C et jusqu'a 6,0% Cr, 1,0% JIo, 0,5% Vet 3,3% W. Influence de la composition chimique et de la vitesse de solidification sur la quote-part de surface, l'arrangement, la configuration et le nombre des carbures et leurstructure cristallographique. Elimina#on des carbures par un recuit de mise en solution. Discussion, a la base des resuliais d'essai, de la naissance et de la grosseur des segregations de carbures.
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