Effect of Turning Parameters on Roundness and Hardness of Stainless Steel: SUS 303

Stainless steel JIS:SUS 303 is widely used for automotive part. This part is mostly manufactured by turning operation. However, turning parameters could be affected to roundness and hardness of workpieces. The purpose of this research was to study factors, which were affecting to roundness and hardness of stainless steel turning. Cutting tool was inserted carbide coated TiCN+Al2O3+TiN with polycrystalline vapor deposited (PVD) cutting tools. Experimental design was conducted as two factors and three levels. The parameters were consisted of cutting speed at 100, 150 and 200 m/min. Feed rate was setting at 0.08, 0.12 and 0.16 mm./rev. Furthermore, the experiment was done by turning with cooling and non-cooling. The results showed that only one factor affected to roundness was cooling condition. It means that cooling would cause on better roundness than non-cooling. On the other hand, cutting speed and feed rate was not affected to roundness. Moreover, the hardness of specimens was not increasing after turning. The studied parameters were not affected to hardness after turning significantly.