【摘要】 研究了0.18C-0.95Cr钢层片状双相组织的拉伸性能。通过修正的C-J分析,研究了临界淬火温度和预淬温度对层片状双相组织应变硬化指数（m）的影响。同一预淬温度下,随临界淬火温度提高,m₁略有提高,m₂明显提高。同一临界淬火温度下,随预淬温度提高,m₁略有降低,m₂明显提高。同一临界淬火温度下,预淬温度愈低,得到的层片状双相组织愈细,不仅具有较高强度,尚有较高塑性。更多还原

【Abstract】 The tensile properties of lamellar-type dual-phase structures of 0.18 C-0.95Cr steet have been studied. The influence of the intereritical quenching temperatures and prequenching temPeratures on the values of work-hardening exponents （m） for lamellar type of dual-phase structures has been studied by modified C-J analysis. The values of m₁ are increased slightly but the values of m₂ are increased considerably with the increasing of intercritical quenching temperatures at the same prequenching temperatures. The Values of m₁ are decreased slightly but the values of m₂ are increased considerably With the increasing of prequenching temperatures at the same intercritical temperature. The values of m₁ are less sensitive than that of m₂ changing with the volume fraction, morphology, lamellar and particle size and distribution of martensite constituent. A finer lamellar type of dualphase structure with higher strength and ductility is achieyed after prequenching from the lower temperature followed by intercritical quenching.更多还原