M/A岛对粒状贝氏体钢冲击韧性的影响  

Influence of M/A Island on Impact Toughness of Granular Bainite Steel

作　　者：于庆波[1] 

机构地区：[1]徐州工程学院江苏省大型工程装备检测与控制重点建设实验室,江苏徐州221008

出　　处：《热加工工艺》2012年第24期41-42,共2页Hot Working Technology

基　　金：江苏省第四期"333工程"培养资金资助项目(BRA2011037)

摘　　要：钢的成分、冷却速度及终冷温度等因素会影响M/A岛形貌和分布。通过力学性能检验和显微组织观察,研究了M/A岛形貌及分布状态对钢的冲击韧性的影响。结果表明:终冷温度是决定M/A岛颗粒大小的重要工艺;细小的M/A岛对粒状贝氏体钢韧性的降低不明显;粗大的M/A岛能降低粒状贝氏体钢的冲击韧性。The effects of composition, cooling rate and quenching temperature on the morphology and distribution of M/A island were studied. The influences of morphology and distribution of M/A island on the impaet toughness of granular bainite steel were investigated. The results indicate that final cooling temperature is one of important processing parameters to determine the size of M/A island particles; small M/A island can slightly decrease the toughness of granular bainite steel, while the coarse M/A island can significantly reduce the impact toughness of bainite steel.

关 键 词：M A岛 粒状贝氏体 冲击韧性 

分 类 号：TG113.26[金属学及工艺—物理冶金]