THE INFLUENCE OF THE COMBINED DEFORMATION AND PRERECRYSTALLIZATION HEAT TREATMENT ON THE SUBSTRUCTURE AND HARDNESS OF STEELS 40X AND 12X13
Journal Title: Вестник Харьковского национального автомобильно-дорожного университета - Year 2018, Vol 82, Issue
Abstract
Problem. Increasing the physical and mechanical properties of materials by nanostructurization is the main problem of modern material science. Combination of previous deformation by 70 % and the fol-lowing pre-recrystallization heat treatment of metals and alloys is the effective way of improving proper-ties. Yet this method has some disadvantages. The main shortcoming of this is small exposure time. It does not allow the usage of this method for manufacture of massive parts of machines and mechanisms. Goal. Researching the influence of combined deformation and subsequent prerecrystallization heat treatment on the hardness and substructure of 40X and 12X13 alloyed steels. Methodology. Methods of computer metallography were used. The X-Ray methods were used to determine the size of coherent scattering areas, quantity of nanoscale sub-grains and the angle of orientation of subgrains. Results. The hardness of examples increases with the increasing angle of orientation after prerecrystallization heat treatment. Originality. The possibility of thermal stabilization of poligonization substrucrure by combined deformation by 60 % and the following pre-recrystallization heat treatment was established. Practical value. The possibility of using pre-recrystallization heat treatment for details of overall dimensions was created.
Authors and Affiliations
A. N. Dubovyi, T. A. Makruha
Keywords
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- EP ID EP479968
- DOI 10.30977/BUL.2219-5548.2018.82.0.92
- Views 110
- Downloads 0
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