Effects of skew rolling piercing process friction coefficient on tube twisting, strain rate and forming velocity

• DOI: 10.1016/j.jmrt.2023.07.167
• Publication Date: 2023-07-22T07:53:30Z
• Authors: Hamed Aghajani De...; Eduardo Garcia; Alberto Murillo-M...
• Keywords: Finite element method; Mining engineering. Metallurgy; Super-martensitic Cr13 stainless steel; TN1-997; Friction coefficient; Plastic deformation; Skew rolling piercing

In this paper the effects of rollers-billet friction coefficient (RFC) and plug-billet (PFC) during skew rolling piercing process are investigated. The has been simulated plastic deformation, temperature evolution, surface twisting pierced tube analysed. Results show that deformation super-martensitic Cr13 stainless steel increases at higher RFC decreases PFC. same trend observed for material strain rate, which with but increasing addition, it found does not affect evolution billet. fact, heating is related to deformation. Comparison fracture surfaces hot tension test samples 0.01s-1 10s-1 confirm point. forward velocity, PFC process. velocity due ductile growth obstacle inside tube. More leads twisting. maximum was 68o RFC=0.6 PFC=0.06, minimum 12o RFC=0.2 PFC=0.15.