Microstructure of Rapidly Solidified Powders and Characteristic of Microsegregation

The microsegregation characteristic with which structure of rapidly solidified Powders of maraging steel is accompanied has been studied. The experimental results are as follows:with increasing cooling rates, segregation characteristic changed as the structure changed from dendritic→cellular-dendritic→cellular→pisolitic morphology. Microsegregation extent decreased obvious.It is found that nosegregation occurs when the microstructure is Pisolitic structure.