临界区淬火铁素体对钢性能的影响

Effect of Ferrite On Steel Property With Hardening In Critical Zone

研究了铁素体形态和亚结构对临界区淬火强韧化的影响。表明：临界区淬火温度不同时，铁素体形态有所差异，当铁素体呈针状，与马氏体相间分布且含量为２０～２５％时强韧化效果最佳。临界区淬火时，铁素体可产生位错强化、固容强化等强化效果，提高铜的强韧性。

The effect of morphology and substructure of ferrite on steel property with hardening in critical zone has been studied.It shows that the morphology of ferrite changes with the temperature of hardening in critical zone, when ferrite assumes acicular constituent and alterates with martensite and the amoumt of ferrite is 15～25%,its effect of the strengthing and toughening is the best.when hardening in critical zone,the dislocation strengthing and solution strengthing in ferrite occeerred,increasing strength and toughness of the steel.