Papers by Keyword: Recrystallization Behavior

Abstract: Along with the rapid development of the science and technology, the requirements of microstructure and properties for the bearing steel are more and more strict. The recrystallization behavior of hot deformed austenite in GCr15 bearing steel was systematically studied under the different deformation amount, deformation temperature and dwell time after rolling, the changes of microstructure and recrystallization percentage was analyzed. The research results show that the recrystallization behavior of hot deformed austenite in GCr15 bearing steel is more and more obvious as the deformation amount, deformation temperature and dwell time after rolling increase, the microstructure is more uniform, and the recrystallization percentage increases; When the deformation amount is 20%, the deformation temperature is 850°C and the dwell time after rolling is 10s, the recrystallization percentage is 32.09%, when the deformation amount is 45%, the deformation temperature is 950°C and the dwell time after rolling is 60s, the recrystallization percentage is 64.31%, comparing it to 32.09%, it increases 100.4%.

Abstract: The effects of alloying elements and impurities on the microstructure and properties of metals and alloys are important. Understanding of these effects may help to control and produce products with desired properties at lower cost. In the present work the effects of Al, Si and Mn on the recrystallization behavior, hardness and microstructural changes of an Fe- containing brass during annealing were studied. The results show that alloying elements strongly affect recrystallization kinetics and resulted finer microstructures. Hardness variations during annealing are consistent with microstructural observations and the presence of alloying elements. All elements slow down recrystallization progress and increase resulted hardness values. The resulted microstructures in the presence of alloying elements are much finer than that of plain 70B brass. It was concluded that the present alloying elements affect the recrystallization behavior of 70B brass in a similar manner. Their mechanism of interactions is solute drag effect and their effects sum up when they present together.