Abstract
This research paper exhibits an experimental investigation of plasma arc cutting of hardox-400 using different types of plasma gases. Nature and behavior of the plasma arc were studied and described the effect of plasma gas on the workpiece. The experiments were performed on 10 mm hardox-400 using CNC plasma cutting machine. The selected workpiece material has very good mechanical properties like high toughness, good bendability, and good weldability. This special abrasion resistance steel is used in part manufacturing of front loaders, buckets, barges, and various mining equipment. Four different plasma gases were chosen for this experiment, i.e., air, argon, oxygen, and nitrogen. Thermophysical properties of plasma gases, properties of generated arc, cutting performance, and energy balance are explained for different plasma gases used. The kerf shape and material removal rate (MRR) due to the generated arc were measured and analyzed the effect. This paper clarifies the potential of cutting process by varying the flow rate and chemical composition of the plasma gas.
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