The Organization And Performance Of The The .10 Cr9molvnbn Steel Austenitizing And Aging Research

In this paper,the relationships of structures and properties of 10Cr9MolVNbNsteel austenization normalizing at different temperature and time and dustenizationnormalizing and high temperature tempering following aging at 580 - 660℃ for zero to5000h were studied by means of transmission electron microscope (TEM) and scanningelectron microscope (SEM).The results are as follow: The optimum austenitise temperatrue of domestic manufacture 10Cr9MolVNbNsteel is 1040 l060℃ .Residual carbide such as NbC or Nb(C,N)still exist when the steelwas austenitise at super-high temperature,1120℃ .There are carbides M₃Cthat like meedlesseparate out from plank martensite after normalizing.The value of strength and toughness was lowest When 10Cr9MolVNbN aging at580 660℃ for 500 1000h.ttis phenomenon was explain as too much coarse carbideM₂₃C₆ continuous separate out along austenite boundary like net and carbide M₂₃C₆ gathertogether as branches of tree or fishbone.The impact toughness of this kind of steel will bedescent when it is aged at 580 660℃.