Título

EFFECT OF THE VARIATION OF CUTTING PARAMETERS IN SURFACE INTEGRITY IN TURNING PROCESSING OF AN AISI 304 AUSTENITIC STAINLESS STEEL

EFFECT OF THE VARIATION OF CUTTING PARAMETERS IN SURFACE INTEGRITY IN TURNING PROCESSING OF AN AISI 304 AUSTENITIC STAINLESS STEEL

Autoria

Orrego, Daniel Alexander Flórez; Jiménez, Luis Bernardo Varela; Atehortua, Julian David Escobar; Ochoa, Diana Maria López

DOI

10.5151/5463-5463-17296

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Resumo

This paper focuses in understanding the effect of the variation of cutting speed and feed rate in surface integrity and microstructural changes in turning of AISI 304 using cemented carbide tool. Feed rates between 0.15 mm rev-1 and 0.6 mm rev-1 and cutting speeds between 40 m min-1 and 120 m min-1 were used. Depth of cut, lubrication conditions and cutting tool material were set as constants. Different roughness parameters were analyzed in order to describe the effect of cutting parameters on surface integrity. Tool wear and chip structure were studied too. Results showed that hybrid roughness parameters such as Rpk, Rvk and Rp/Rv described the topography of the turned surfaces in a better way, giving relevance to the peak formation. It was found that for austenitic stainless steel and under these tested conditions, the evaluation of surface integrity only through roughness measurements may be unsatisfactory, since high amounts of micro-defects such as voids and pits were found for the lowest roughness values.

 

This paper focuses in understanding the effect of the variation of cutting speed and feed rate in surface integrity and microstructural changes in turning of AISI 304 using cemented carbide tool. Feed rates between 0.15 mm rev-1 and 0.6 mm rev-1 and cutting speeds between 40 m min-1 and 120 m min-1 were used. Depth of cut, lubrication conditions and cutting tool material were set as constants. Different roughness parameters were analyzed in order to describe the effect of cutting parameters on surface integrity. Tool wear and chip structure were studied too. Results showed that hybrid roughness parameters such as Rpk, Rvk and Rp/Rv described the topography of the turned surfaces in a better way, giving relevance to the peak formation. It was found that for austenitic stainless steel and under these tested conditions, the evaluation of surface integrity only through roughness measurements may be unsatisfactory, since high amounts of micro-defects such as voids and pits were found for the lowest roughness values.

Palavras-chave

Turning; Austenitic stainless steel; Surface integrity; Roughness parameters.

Turning; Austenitic stainless steel; Surface integrity; Roughness parameters.