Experimental Assessment if Changes in Structural Steel Composition by Progressive Technology Cutting

Abstract

The submitted paper deals with the issue of change in structure, hardness and thermally affected zone of the samples of a toothed wheel part produced by technology of cutting by plasma, laser and water jet. The cutting process by laser and plasma technology causes intensive thermal affection of material and change in structure and microhardness in the cutting area referred to as thermally affected zone. The paper describes three material cutting technologies of the toothed wheel part. The experimental part contains description of experimental sample preparation, its hardness measurement and examination of structure along with further evaluation through graphs and photo documentation of structures.

The influence of the laser cutting process parameters on the quality of the cut edge

“…The results of the hardness measurement are presented in Figure 2. In general, hardness for all samples is approximately 8 % higher than that for the literature data [22,23]. This stems from the fact that even a lower value of the torch velocity is more than 1.4 m/min, which allows a martensitic or bainitic transformation to occur.…”