Abstract
The microstructure of samples of low-alloy CrMo steel subjected to various heat treatments is studied by transmission electron microscopy. The observations indicate that the decisive factors which control the coercive force Hc are the density and the arrangement of the dislocations. The precipitates have only a secondary effect. The observed linear dependencc of Hc vs. ϱ1/2 (ϱ dislocation density) confirms well theoretical predictions. Die Mikrostruktur von Proben aus niedrig legiertem CrMo-Stahl nach verschiedenen Warmebehandlungen wird mittels Durchstrahlungselektronenmikroskopieuntersucht. Die Beobachtungen deuten an, daß die für die Koerzitivkraft Hc maagebenden Faktoren die Dichte und Verteilung von Versetzungen sind. Die Einschldsse haben nur einen sekundären Effekt. Die beobachtete lineare Abhangigkeit von Hc über ϱ1/2 (ϱ Versetzungsdichte) bestätigt gut die theoretischen Voraussagen.
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