Experimental Investigation of Deformation and Spring-Back and Spring-Go Amounts of 1.5415 (16MO3) Sheet Material

Abstract

The spring-go and spring-back behavior of 16Mo3 sheet metal as a result of the V-deep bending process was examined. In the bending process, the effect of normalization and tempering heat treatment on 16Mo3 sheet metals was also microstructurally examined. The experimental study was performed in two stages. In the first stage, the effects of the thickness of the sheet metal on spring-go and spring-back behavior were inspected. Thus, 3-, 4-, 5-, and 6-mm-thick sheet metals to which unheated treatment was applied were subject to normalization and tempering, then bending processes were applied at a 150o bending angle in a punch tip radius of R 4.5 mm, and their spring-back and spring-go behaviors were examined. Secondly, the bending processes were applied. By removing small samples from the middle deformation area of the unheated treatment, normalization, and tempered sheet metals, their ferrite, pearlite, and martensite structures were microstructurally characterized, as a result of which, it was found that the material used in the heating process had a ferrite phase and pearlite structure, the normalization materials had fine pearlite structure and ferrite phase, and the annealed materials had a random and acicular martensite structure.