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Wednesday, September 12, 2012: 8:30 AM
Atlantic D (Radisson Blu Aqua)
This article presents analysis of the mechanical properties, structure and deformation of the gears after vacuum carburizing process followed by the quenching of gases at high pressure.
Case-hardened (to the effective case depth of 0.3 mm and 0.6 mm for the criterion 450HV1) gears of module 2 (16MnCr5) and 5 (15CrNi6) were investigated. The processes were carried out in temperatures 9500C and 10000C. The cooling ratios in nitrogen and helium and their effects on microstructure, shape and dimensional changes in the characteristic points of the geometry of gears was compared and analyzed.
Moreover, processes were also carried out for layers of thickness 1.2 mm and 1.5 mm, what aimed to investigate the effect of case depth layer thickness on the deformation with the invariant other parameters of heat treatment.
On the basis of research results, the basic relations between the temperature of the process, carburized layer thickness, the type of cooling medium and their influence on the volume gears deformation after heat treatment processes were determined. These results were compared with the results of heat treatments realized with oil quenching with vigorous agitation.
Case-hardened (to the effective case depth of 0.3 mm and 0.6 mm for the criterion 450HV1) gears of module 2 (16MnCr5) and 5 (15CrNi6) were investigated. The processes were carried out in temperatures 9500C and 10000C. The cooling ratios in nitrogen and helium and their effects on microstructure, shape and dimensional changes in the characteristic points of the geometry of gears was compared and analyzed.
Moreover, processes were also carried out for layers of thickness 1.2 mm and 1.5 mm, what aimed to investigate the effect of case depth layer thickness on the deformation with the invariant other parameters of heat treatment.
On the basis of research results, the basic relations between the temperature of the process, carburized layer thickness, the type of cooling medium and their influence on the volume gears deformation after heat treatment processes were determined. These results were compared with the results of heat treatments realized with oil quenching with vigorous agitation.