Investigation into Effects of Different Tempering Temperatures on Mechanical Properties of 51CrV4 Steel

Abstract

In the automotive and machinery industries; 51CrV4 steels are preferred due to their high strength, high impact strength, and excellent fatigue performance for the manufacturing of fatigue sensitive parts. They are included in the group of heat treatable and hardenable steels. 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. As a result of the study, 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.

Keywords

• 51crv4
• heat treatment
• dry sand rubber wheel
• wear
• mechanical properties