Abstract
Dual-phase steels are manufactured from low and medium carbon steels. DP steels are high in strength and can be machined using non-traditional techniques. The challenge in machining the dual-phase steel is to obtain the minimum surface roughness and the highest material removal rate. WEDM is chosen for machining the DP 980 steel, as it is capable of maintaining low surface roughness, high accuracy, quick processing and is very cost-efficient. For this experimental study 27 pieces of DP (980) steel of dimensions 20 mm diameter and 20 mm length are used for conducting 27 experiments on WEDM. The experiment layout is based on Taguchi's L-27 orthogonal array. The experiment was executed considering the parameters like voltage (V), pulse on (TON) and pulse off (TOFF). It was noticed that the optimum parameters for the minimum surface are voltage (30 V), pulse on (110 µs), pulse off (54 µs) and for maximum material removal rate are voltage (20 V), pulse on (120 µs), pulse off (50 µs).
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