【摘要】 对10Ni5CrMoV高强度船用钢板进行二次不同温度的淬火处理;测量其奥氏体晶粒度,确定了该钢晶粒度与加热温度的关系。结果表明:10Ni5CrMoV钢第一次淬火加热温度高于1200℃后晶粒急剧长大;二次淬火加热温度稍高于Ac3时,存在明显的组织遗传性,随二次淬火加热温度的升高,组织遗传性逐步消除,当淬火加热温度为810℃时组织遗传性开始消除;加热温度为960℃时发生再结晶,晶粒得到细化,组织遗传性完全消除,当加热温度高于970℃时细化的奥氏体晶粒开始长大。通过二次淬火,使该钢组织得到调整,晶粒细化,可获得更好的强韧性,满足工程的特殊性能需求。更多还原

【Abstract】 The 10Ni5CrMoV steel was quenched at different temperature. The austenite grain size was measured, and the relationship between grain size and temperature was determined. The results show that: grains of 10Ni5CrMoV steel grow evidently when the temperature of first quenching is above 1200 ℃; obvious microstructure heredity occurs when specimens are secondary-quenched above Ac3. Microstructure heredity disappears gradually while the temperature of secondary quenching increases. Microstructure heredity begins to disappear at 810 ℃; the recrystallization and finer grains appear and microstructure heredity disappears completely at 960 ℃. Fine austenite grains grow again at 970 ℃. Metallographic structure and grain size is adjusted by secondary quenching, which gets good obdurability and meets the requirement.更多还原