FARKLI MENEVİŞLEME SICAKLIKLARININ 51CrV4 ÇELİĞİNİN MEKANİK ÖZELLİKLERİNE ETKİLERİNİN İNCELENMESİ

Abstract

In this study, samples of 51CrV4 steel tempered at two different temperatures after annealing and oil cooling were examined. The changes in the morphology and mechanical properties of the samples processed at different temperatures were analyzed. The effects of tempering on wear resistance were discussed. Figure A. Schematic representation of experimental studies Purpose: The aim of the study is to discuss and compare the effects of different tempering temperatures on microstructure and mechanical properties. Theory and Methods: Samples of 51CrV4 steel were annealed at 970 °C and oil cooled. Then, they were tempered at 220 °C and 315 °C and examined. Microstructures and morphological changes of steel samples were examined using optical microscope, SEM-EDS and XRD. Changes in mechanical properties were examined by tensile, charpy impact and dry sand rubber wheel abrasion tests. Results: Results show that two different microstructures consisting of carbide sediments in the ferritic matrix and containing a bainitic structure were reached. No significant difference was observed in the hardness measurements taken from the section and the surface. However, as a result of the tensile, charpy impact, and dry sand rubber wheel abrasion tests, significant differences were observed between the sample groups and it was concluded that the most suitable tempering temperature was 315 °C. Conclusion: 51CrV4 steel were tempered at two different temperatures after annealing and oil cooling and examined in this study. The changes in the morphology and mechanical properties of the samples processed at different temperatures were analyzed and presented.