【摘要】 用18Cr2Ni4WA钢研究了M－A组织对包中格效应（BF）的影响，结果表明，M对BE的影响显著，BE与M体积分数（VM）之间呈良好的线性相关关系，VM足够高时，包申格系数（B）可为负值，当用多次高温回火去除M后，其B变为正值。VM对B和屈服强度（σ0.2）的影响均与VM对拉伸曲线初始阶段“圆化”程度的影响密切相关，对含有M-A组织的粒状组织（GS）和粒状贝氏体（Bg）的B～σ0.2的回归分析表明，B与σ0.2之间存在着良好的线性相关关系。更多还原

【Abstract】 l8Cr2Ni4WA steel is used to study the influence of M-A tissue on bauschinger effect (BE). The re-sults show that M affects BE sharply and that BE is well linear with the volume fraction of M (VM). When VM is highenough,bauschinger coefficient (B) may be negative,but B becomes fositive after M has been ellminated by multiplehigb temrerature temper. The influences of VM on B and the yield strengeh (oo.2) are clearIy related to the influence onthe circularization degree of the initial stage of tension curve. B～σ0.2 regression anaIysis of granular tissue (GS) andgranular bainite (Bg) containing MuA tissue shows that B and σ0.2 are good linear dependence reIation.更多还原