INVESTIGATIONS ON THE INFLUENCE OF ISOTROPY IMPROVING ALLOY ADDITIVES WHEN MACHINING 38MNSIVS6

Abstract

Resulfurized steels are commonly used in the industry due to its good machinability, which can be related to the formation of microstructural manganese sulfide (MnS) inclusions. On the downside, MnS inclusions cause a high steel anisotropy due to its elongated form. Within this paper, the effect of a MnS reduction and the influence of different countermeasures on the machinability is investigated. The addition of either selenium (Se) or bismuth (Bi) is combined with a reduction of the sulfur content with the aim to increase the isotropy and, consequently, the fatigue performance of the steel variants. Drilling investigations in longitudinal and transversal direction to the steel fiber are conducted and evaluated regarding wear development and cutting forces. The experiments showed that the addition of the two elements resulted in a good compensation of the MnS reduction regarding the machinability.

Recommended articles

THE INFLUENCE OF CUTTING CONDITIONS ON SURFACE INTEGRITY IN HIGH FEED MILLING OF Ti-6Al-4V WITH SUPERCRITICAL CO2 COOLING

P. Litwa, K. K. Wika, A. Zonuzi, C. Hitchens
Keywords: Milling; Ti-6Al-4V; Supercritical carbon dioxide; Surface integrity

ADAPTIVE TOOLPATH FOR 3-AXIS MILLING OF THIN WALLED PARTS

N. Grossi, A. Scippa, L. Croppi, L. Morelli, G. Campatelli
Keywords: Toolpath; Milling; Thin-wall workpiece

LONG-TERM THERMAL COMPENSATION OF 5-AXIS MACHINE TOOLS DUE TO THERMAL ADAPTIVE LEARNING CONTROL

P. Blaser, J. Mayr, K. Wegener
Keywords: Thermal behavior; Compensation; Self-optimization; Machine learning

THE IMPACT OF SIZE REDUCTION ON THE ENERGY EFFICIENCY, DYNAMICS AND MACHINING PERFORMANCES IN MILLING

P. Haas, A. Schorderet, C. Jeannerat, J. Richard, Ch. Balistreri, N. P. Gilani
Keywords: Size reduction; Micro-machine; Milling; Energy; Dynamics; Machining performances; Air consumption; Thermal characteristics; Modal analysis