【摘要】 研究了X80钢在不同奥氏体化温度下调质处理后的力学性能和组织变化。结果表明,奥氏体化温度为1150℃时,X80钢的奥氏体晶粒严重粗化,导致粗板条贝氏体铁素体的产生,致使X80钢的强度升高和韧性严重降低;通过奥氏体化温度为850℃、950℃的淬火处理,同时辅以650℃的回火处理,可以使X80钢获得以细小针状铁素体为主的组织,从而获得良好的强韧性配合。更多还原

【Abstract】 The mechanical properties and microstructure of X80 pipeline steel after quenching at different austenizing temperatures,and tempering treatment were investigated.The results show that austenite grain of the X80 steel austenized at 1150 ℃ is coarsened,resulting in thicker lath bainite ferrite after quenching and tempering treatment,which increases the strength and descreases greatly the toughness of X80 steel.Quenching at 850 ℃-950 ℃ and tempering at 650 ℃,large amount of fine acicular ferrite forms in X80 steel,achieving high strength and toughness.更多还原