H.S.Di
,
G.Z.Cui
,
G.D.Wang
,
X.H.Liu
金属学报(英文版)
The ductility map of 304HC stainIess was determinae by using the Gleeble-1500dy-namic thermal-mechanical simulator.The effect of Cu on the hot ductility of 304HC stainless steel was analyzed and the mathematical model of resistance to deformation was estoblished.The microstructur,inclusion and fracture surface wer studied by using the methad of microstructure analysis,scanning,eneryy spectrum and electron microscope.The results show that Cu has effect on the hot uctility,and the hot ductility of 304HC stainless steel decrease with the increase of content of Cu.The deformation temperature also has much effect on the hot ductility,the suitable defor-mation temperature are 1100-1200℃.The reason of it is that the Cu rich chemical compounds were precipitated from austenite phase during cooling.The Cu rich chem-ical compounds are brittle substance such as Cu2S,Cu2O and ε-Cu etc.
关键词:
304HC stainless steel
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null
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null
Y.B.Xu
,
G.D.Wang
,
X.H.Liu
金属学报(英文版)
On the basis of superelement model,Cahn's transformation kinetics theory and Scheil's additivity rule,the CCT diagrams and transformation kinetics in low carbon steel were predicted considering both undeformed and deformed conditions.The influence of deformation on phase equilibria and transformation incubation period was evaluated quantitatively.The recrystallization kinetics and the evolution of dislocation density were calculated during continuous cooling.The results show deformation considerably shortens transformation incubation period,accelerates transformation kinetics and makes CCT curve shift leftwards.The calculated CCT diagrams and the volume fraction of each phase are in good agreement with measurements.
关键词:
thermodynamics
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null
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