Details
| Original language | English |
|---|---|
| Pages (from-to) | 447-454 |
| Number of pages | 8 |
| Journal | Surface and Coatings Technology |
| Volume | 254 |
| Publication status | Published - 8 Jul 2014 |
Abstract
The use of cemented tungsten carbide inserts in hard machining requires proper coatings and edge micro-geometries. A suitable choice of these factors enables the reduction of cutting forces, the increase of tool life and the improvement of workpiece surface quality. However, the effects of the edge preparation method and coating process on the substrate properties influence the performance of the insert during cutting. In this context, the influence of two different edge preparation methods (plunge-face grinding and brushing) on the performance of TiAlN-coated cemented tungsten carbide inserts during hard turning is investigated. In general, higher values of surface roughness (Rz ≅ 0.3. μm) and edge chipping (Rk ≅ 4.5. μm) were observed for brushed inserts in comparison to the ground tools (Rz ≅ 0.2. μm, Rk ≅ 3.7. μm). Moreover, higher compressive residual stresses are induced by brushing in comparison to grinding (≅ 500. MPa against ≅ 400. MPa). In turning tests, cutting forces for the ground inserts are approximately 10% higher than for the brushed inserts. However, higher wear values are better related to lower compressive residual stresses in the substrate than to higher cutting forces.
Keywords
- Cemented tungsten carbide, Cutting edge preparation, Hard turning, PVD-TiAlN coating, Residual stress
ASJC Scopus subject areas
- Chemistry(all)
- Physics and Astronomy(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Materials Science(all)
- Surfaces, Coatings and Films
- Materials Science(all)
- Materials Chemistry
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In: Surface and Coatings Technology, Vol. 254, 08.07.2014, p. 447-454.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of the cutting edge preparation method on characteristics and performance of PVD coated carbide inserts in hard turning
AU - Denkena, B.
AU - Köhler, J.
AU - Breidenstein, B.
AU - Abrão, A. M.
AU - Ventura, C. E.H.
N1 - Funding information: The authors of the paper gratefully acknowledge the financial support received from CAPES (Brazilian Federal Agency for the Support and Evaluation of Graduate Education, Grant number BEX4202/10-4) .
PY - 2014/7/8
Y1 - 2014/7/8
N2 - The use of cemented tungsten carbide inserts in hard machining requires proper coatings and edge micro-geometries. A suitable choice of these factors enables the reduction of cutting forces, the increase of tool life and the improvement of workpiece surface quality. However, the effects of the edge preparation method and coating process on the substrate properties influence the performance of the insert during cutting. In this context, the influence of two different edge preparation methods (plunge-face grinding and brushing) on the performance of TiAlN-coated cemented tungsten carbide inserts during hard turning is investigated. In general, higher values of surface roughness (Rz ≅ 0.3. μm) and edge chipping (Rk ≅ 4.5. μm) were observed for brushed inserts in comparison to the ground tools (Rz ≅ 0.2. μm, Rk ≅ 3.7. μm). Moreover, higher compressive residual stresses are induced by brushing in comparison to grinding (≅ 500. MPa against ≅ 400. MPa). In turning tests, cutting forces for the ground inserts are approximately 10% higher than for the brushed inserts. However, higher wear values are better related to lower compressive residual stresses in the substrate than to higher cutting forces.
AB - The use of cemented tungsten carbide inserts in hard machining requires proper coatings and edge micro-geometries. A suitable choice of these factors enables the reduction of cutting forces, the increase of tool life and the improvement of workpiece surface quality. However, the effects of the edge preparation method and coating process on the substrate properties influence the performance of the insert during cutting. In this context, the influence of two different edge preparation methods (plunge-face grinding and brushing) on the performance of TiAlN-coated cemented tungsten carbide inserts during hard turning is investigated. In general, higher values of surface roughness (Rz ≅ 0.3. μm) and edge chipping (Rk ≅ 4.5. μm) were observed for brushed inserts in comparison to the ground tools (Rz ≅ 0.2. μm, Rk ≅ 3.7. μm). Moreover, higher compressive residual stresses are induced by brushing in comparison to grinding (≅ 500. MPa against ≅ 400. MPa). In turning tests, cutting forces for the ground inserts are approximately 10% higher than for the brushed inserts. However, higher wear values are better related to lower compressive residual stresses in the substrate than to higher cutting forces.
KW - Cemented tungsten carbide
KW - Cutting edge preparation
KW - Hard turning
KW - PVD-TiAlN coating
KW - Residual stress
UR - http://www.scopus.com/inward/record.url?scp=84905046724&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2014.07.003
DO - 10.1016/j.surfcoat.2014.07.003
M3 - Article
AN - SCOPUS:84905046724
VL - 254
SP - 447
EP - 454
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
SN - 0257-8972
ER -