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High strength steels are used in many high-end applications. Due to the high cost of raw material, manufacturing engineers should be very careful during their machining process. Surface finish is the critical factor in the turning process of combustion chambers of gun barrels. It should conform to the required accuracy values. This paper analyzes the impact and parameters of the process have on the roughness of the surface. The impact is analyzed during turning operations of high strength steel material. The parameters considered include feed rate, depth of cut and cutting speed. The test plan was implemented through 125 test specimens. The latters were divided into 25 groups. Each five groups were subjected to one common machining speed. Each group was machined using five levels of cutting depth. Each depth was processed using feed rate having five levels. Tessa was used for the examination of the roughness of surface. The experimental findings were compared to the requirement of the surface finish on the basis of the design drawing of gun barrel. The combination of the process variables showed excellent agreement with the design drawing of gun barrels.

Influence of Process Parameters on the Surface Roughness during turning operation of High Strength Steel