Powder Metallurgy Processing of Rapidly Solidified Alloyed Cast Iron Powders for Machine Components

摘要

Cast iron powders containing little amount of Al, Cr, and Si were produced via water atomization technique and then got annealed at 900°C for removing oxygen in hydrogen atmosphere. The advantages of rapid solidification remained undisturbed in spite of high temperature. The powders after pre-compaction studies were cold compacted up to 700 MPa pressure and then sintered at different temperatures like 720, 850, and 1000°C. Growth like dimensional changes was observed in all the samples. The sample which was compacted at 700 MPa and sintered at 1000°C showed 48 HRC hardness. High hardness values could enable these materials for manufacturing high-strength machine components.