Technical Paper

Journal of the Brazilian Society of Mechanical Sciences and Engineering

, Volume 36, Issue 4, pp 763-774

Influence of the cutting edge micro-geometry of PCBN tools on the flank wear in orthogonal quenched and tempered turning M2 steel

  • Dilson José Aguiar de SouzaAffiliated withDepartment of Mechanical Engineering, Universidade do Vale do Rio dos Sinos, UNISINOS Email author 
  • , Walter Lindolfo WeingaertnerAffiliated withLaboratory for Precision Engineering, Department of Mechanical Engineering, Universidade Federal de Santa Catarina, UFSC
  • , Rolf Bertrand SchroeterAffiliated withLaboratory for Precision Engineering, Department of Mechanical Engineering, Universidade Federal de Santa Catarina, UFSC
  • , Cleiton Rodrigues TeixeiraAffiliated withSchool of Engineering, Study Group on Manufacturing and Materials, Universidade Federal do Rio Grande, FURG

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Abstract

Quenched and tempered high-speed steels obtained by powder metallurgy are commonly used in automotive components, such as valve seats of combustion engines. In order to machine these components, tools with high wear resistance and appropriate cutting edge geometry are required. This work aims to investigate the influence of the edge preparation of polycrystalline cubic boron nitride (PCBN) tools on the wear behavior in the orthogonal longitudinal turning of quenched and tempered M2 high-speed steels obtained by powder metallurgy. For this research, PCBN tools with high and low-CBN content have been used. Two different cutting edge geometries with a honed radius were tested: with a ground land (S shape) and without it (E shape). Also, the cutting speed was varied from 100 to 220 m/min. A rigid CNC lathe was used. The results showed that the high-CBN, E-shaped tool presented the longest life for a cutting speed of 100 m/min. High-CBN tools with a ground land and honed edge radius (S shaped) showed edge damage and lower values of the tool’s life. Low-CBN, S-shaped tools showed similar results, but with an inferior performance when compared with tools with high CBN content in both forms of edge preparation.

Keywords

PCBN Edge geometry Ground land Honed edge radius High-speed steel obtained by powder metallurgy Orthogonal longitudinal turning