Influência do ângulo e do coeficiente de atrito nas tensões residuais geradas na trefilação de barras de aço AISI 1045

Abstract

Influência do ângulo e do coeficiente de atrito nas tensões residuais geradas na trefilação de barras de aço AISI 1045 Die angle and friction coefficient influence on residual stresses generated in wire drawing in bars of AISI 1045 steel

Bending Distortion Analysis of a Steel Shaft Manufacturing Chain from Cold Drawing to Grinding

“…The higher hardened depth generated higher curvatures for the different drawing angles. A DoE specific for the distortion after induction hardening was presented in a previous work where more details are given by Dong et al [9] After the grinding process, the curvature vectors (circle marks) show a large reduction in their magnitude, but the remaining curvature is still slightly higher for the 15 deg drawing angle than for 20 deg. It is also possible to It is also clear that the results for all bars drawn in the 15 deg drawing tool presented a preferred distortion direction.…”

“…The analysis of the curvature results shows that the drawing process variation is the most significant factor with a confidence of 98 pct. A previous DoE analysis [9] before the grinding process also presented the drawing variations as the most significant factor. The interaction between drawing and cutting also appears significant, as well as interaction of cutting and induction hardening.…”

“…These segregations show different properties than the rest of the material due to higher carbon and manganese content. [9] In order to simulate this effect, a different material at the core of the sample bar was defined in the simulation. In a first approximation, the steel Grade 1060 was chosen from the available possibilities in the database of the software Simufact.formingGP Ò to represent this richer carbon zone.…”