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采用持久试样方法,结合Gleeble、硬度分析、SEM、EDS、TEM等分析手段,对TP310HCbN耐热钢热变形以及在650℃与700℃条件下持久及析出行为进行了分析.结果表明:两种持久温度条件下,硬度变化趋势差别不大;随着持久时间延长,TP310HCbN耐热钢晶内析出物由颗粒状转变为棒状,并存在大量与位错相互作用的蠕虫状NbCrN析出物;太钢生产的TP310HCbN耐热钢650℃/700℃-100000h外推持久强度均满足标准要求.

Using persistent experiment method, combined with Gleeble,hardness analysis, SEM, EDS, TEM and other analytical methods, the hot deformation, stress rupture and precipitation behavior of TP310HCbN heat resistance steel was analysed at 650℃ and 700 ℃, the results show that: the change of the hardness is not obviously under two different stress rupture temperature;with stress rupture time prolongs, TP310HCbN heat-resistant steel intragranular precipitates from granular into rod-shaped, and presence of wormlike NbCrN rich precipitates and dislocation interactions;Taiyuan Iron and Steel production of TP310HCbN heat-resistant steel at 650/700℃-100000h extrapolation lasting strength meet the standard requirements.

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