Investigação de desvios geométricos na furação de aço avançado de alta resistência strenx® 700 com ferramentas de aço-rápido revestidas

Abstract

This research investigated the behavior of two commercial steel drills - Dormer A100 standard edging steam-annealed and Dormer A002 cross-edged coated with TiN - in the drilling of an advanced high strength steel (AHSS), Strenx® 700 of SSAB. The purpose of this study was to select the best drill through the analyzes of roughness, circularity and diameter of the holes. In the experiment, three replicates were made for each coating, so that the tolerances and roughness of the holes were measured. Due to the characterization of Strenx® 700 Steel, which was made using an X-ray fluorescence spectrometer, optical and scanning electron microscopy, durometer and microdurometer, it was concluded that this is a martensitic AHSS. The roughness parameters were inconclusive to contribute to the decision of which drill had the best performance. The results of the circularity at the beginning and at the end of the holes made by the drill A002 were worse than the drill A100. Considering the parameters used, the drill A100 presented a better cost-benefit.