Effect of copper and silicon addition on the ring fracture strength and hardness of sintered-hot forged carbon steels

Present investigation pertains to studying the effect of addition of 0.40% Cu with 1.0% Si on the fractional theoretical density and radial crushing strength for sintered-hot deformed Fe-0.8% C Powder Metallurgy ring preforms. Rings of predetermined geometry were machined out of the hot deformed preforms to various height strains. Increasing density of the rings raised the radial crushing strength. The hardness was continuously increasing with fractional theoretical density. Decreasing the initial height-to-diameter ratio substantially increased the hardness for any theoretical density attained. Majority of the rings crushed in a highly brittle manner.