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| 1 | INFLUENCE OF HOT DEFORMATION ON CONTINUOUSCOOLING BAINITIC TRANSFORMATION IN A LOWCARBON STEEL显示文摘The influence of hot deformation conditions on continuous cooling bainitic transformation has been investigated for a low carbon microalloyed steel. The CCT diagrams show that deformation in unrecrpstallized austcnite ation can accelerate transformation process. Bainitic transformation in intermediate transformation temperature region is prominent, and the proeutectoid polygonal ferrite transformation at evelated high temperature is suppressed. According to optical and TEM analyses, low carbon bainitic ferrite is characterized by granular and lathlike ferrite, based on the cooling rate and deformation conditions. For nondeformation, groaps of coarse parallel ferrite lath form from the prior austenite grain boundaries with the same crystallographic orientation. For heavy deformaton, cell structure within the austenite grains due to the high dislocation density formed, which provides more nucleation sites for bainite ferrite. So deformation can discontinue the growth of ferrite laths and decrease the length of ferrite laths. | Z.D.Wang J.B.Qu X.H.Liu G.D.Wang | 1998 | Acta Metallurgica Sinica(English Letters)1998，11，2： | 4 |
| 2 | 查看详情显示文摘 | M.C.Zhao Y.Y.Shan J.B.Qu K.Yang | | 0，，2： | 1 |
| 3 | MODELLING FOR PREDICTION OF CONTINUOUS COOLING TRANSFORMATION KINETICS OF HOT-DEFORMED AUSTENITE STEEL显示文摘On the thermodynamics basis of regular solution sub-lattice model and soperelement model, kinetics basis of Cahn’s transformation kinetics theory, and according to Scheil’s additivity rule and eoperimental results obtained by thermal dilation method,a prediction model of transformations from hot-deformed austenite to ferrite, pearlite and bainite in low alloy steels, which could be applied to continuoas cooling process, is developed. The calculated transformed junctions of each phase based on laboratory controlled rolling and controlled cooling conditions in a low alloy steel are in reasonable agreement with the measured ones. | J.B.Qu Z.D.Wang X.H.Liu G.D.Wang | 1998 | Acta Metallurgica Sinica(English Letters)1998，11，3： | 1 |
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