采用形变热处理的方法来改善含0.36％C、1.48％B的亚共晶Fe-C-B合金的组织和性能.结果表明,高温形变后,合金中的含硼硬质相由连续网状分布转变为块状聚集态分布,α-Fe中形成了(110)晶面的择优取向.形变后的试样经1050℃奥氏体化淬火后,硬质相聚集现象消失,转变为条块状弥散分布在基体中,基体完全转变成马氏体,α-Fe中(110)晶面的择优取向消失.经过形变热处理后,合金硬度达58 HRC,冲击韧性与形变热处理前有较大提高,达到9.3 J/cm2.
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