用TEM 研究了6—5—4—2高速钢中的贝氏体转变。结果表明,在贝氏铁素体的宽面上存在巨型长大台阶。贝氏铁素体亚片端部的曲率半径随转变温度降低而减小。贝氏铁素体中的位错密度都远低于周围板条马氏体中的位错密度,这些特征都表征贝氏体长大系扩散机制。
Bainite transformation in a 6-5-4-2 high speed steel has been investiga-ted by means of TEM.The results show that superledges exist on the broadfaces of bainite ferrite.The radius of curvature at top of bainite subunitdecreases with the decrease of transf
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