摘要
Inordertolocateareasonableheatingsystem,theaustenitegraingrowthbehaviorofNbmicroalloyedmediumcarbonsteelhasbeenexperimentallystudiedatvariousaustenitizingtemperaturesandfordifferentholdingtimes.Itisindicatedthataustenitegraingrowthincreaseswithincreasingaustenitizingtemperaturesandholdingtimes.Particularlywhentheaustenitizingtemperaturewasabove1100℃,austenitegrainsgrewrapidly,andanabnormalaustenitegraingrowthwasobserved.Whentheaustenitizingtemperaturewaslowerthan1100℃,austenitegrainsizeandgrowthrateweresmall.Theactivationenergyofgraingrowthinthetestedsteelis397679.5J/mol.Toensureanabsenceofcoarsegrainsinmicrostructures,theheatingtechnologyofthetestedsteelshouldbecontrolledfor1hat1100℃.Therelationshipsofausteniteaveragegrainsizewithsoakingtemperatureandtimeoftestedsteelwereobtainedbymathematicalcalculation,andausteniteaveragegrainsizewasfoundtobeinagreementwiththemeasuredsizefordifferentholdingtimes.
出版日期
2011年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
