Warm compaction of stainless steel powder injection

Due to the stainless steel powder injection powder particles is hard and poor compression, room temperature compression molding forming, required to suppress higher pressure, on the press and die, higher requirements and sintered products elastic aftereffect is serious, low density and only of preparation of simple shape parts. Warm compaction is a process of mixing and heating the powder and special lubricant to a certain temperature.

Compared to cold pressure forming, it can with lower pressure to obtain higher pressure on the green density and strength and can reduce the elastic aftereffect. Temperature and pressure conditions, powder plastic deformation enhanced, and improve green density; at the same time lubricant in under the temperature of warm compaction was semi solid, the liquid phase composition will flow in the pore by the grain boundaries, thereby increasing the particle contact.