Effect of Multi-Coats of Cutting Tools on Surface Roughness in Machining AISI 1045 Steel | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 26, Issue 12, December 2008, Pages 1523-1533 PDF (263.64 K) | ||
| DOI: 10.30684/etj.26.12.7 | ||
| Author | ||
| Maan Aabid Tawfiq | ||
| Abstract | ||
| In this study, orthogonal machining tests in dry turning method are performed on (AISI 1045 St.), in order to examine the influences for the type and number of coatings on surface roughness. The cutting tools used are (TiN, TiN/TiC, and TiN/Al2O3/TiC); multiple layers coated cemented carbide inserts. The tests are performed at five different cutting speeds (80, 112, 155, 220 and 300) m/min, while the feed rates are kept to be (0.08, 0.11, 0.14, 0.16 and 0.2) mm/rev respectively, at constant depth of cut and tool geometry. The results showed that (TiN/TiC) coated cutting tools gave best results for surface finish compared with TiN/Al2O3/TiC, TiN and uncoated tool, for all the selected machining conditions. The experimental results showed that, when the cutting speed is increased from (80-300)m/min and feed rate is reduced by (250%), the values of surface roughness is decreased by: (20%) for uncoated tool insert ,(27%) for single coated layer insert (TiN), (55%) for double coated layer insert (TiN/TiC) and (49%) for triple coated layer insert (TiN/Al2O3/TiC). | ||
| Keywords | ||
| surface finish; roughness; machining parameters; coated tools | ||
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