The purpose of shot peening is to induce a residual compressive stress on the gear floor that’s used to enhance tooth bending fatigue properties. The residual compressive stress offsets the utilized tensile stress that may cause bending fatigue fail. • On-demand consumption of energy by the gear and course of only when wanted due to the nature of the vacuum operation. • Process and cycle flexibility allows a larger diversity of supplies to be processed. The hydrocarbon at present being used for vacuum carburizing are acetylene , acetylene/hydrogen (C2H2/H2), acetylene/ethylene/hydrogen C2H2/ C2H4/H2, propane , propane/methane (C3H8/ CH4) and cyclohexane , …