Share
Export Citation
Analysis of the Effect of High Carbon Steel Softening Process on the Quality of Lathe Machining Results
Aminy A.Y.
Aip Conference Proceedings
Abstract
In this paper, we studied lathe machining characteristics of hard materials that have been softening with an annealing process. We utilized carbide cutting tools with variations of machining parameters and machining perform without cooling water. The data was obtained experimentally by giving machining variables of spindle speed of 750 rpm, 1000 rpm and 1250 rpm; feed (f) of 0.035 mm/rev, 0.05 mm/rev, 0.085 mm/rev and 0.18 mm/rev; and cutting depth of 0.5 mm. The materials used were high hardenability antifriction bearing steel ASTM A 485 and annealing process was carried out at a temperature of 1000 °C. After the machining process, surface roughness (Ra) measurement was performed using Mitutoyo Surface Tester 301. Measurements were performed on both materials which were annealed and without annealing as a reference. The results show that annealing treatment increased the surface roughness. The Ra value for material without annealing was 1.150 µm to 2.865 µm and annealed material of 1.394 µm to 6.999 µm. Maximum roughness occurred in spindle speed of 1000 rpm for material without annealing, while annealed material it happened at 750 rpm. On the other hand, minimum roughness occurred in spindle speed of the 750 rpm for material without annealing, while annealed material happened at 1250 rpm. In conclusion, this indicated that the softer material due to annealing treatment will largely depend on spindle speed choice on produced high quality (low surface roughness) in machining process especially on dry machining.