Analysis of Twin-Nozzle-Scanning Spray Forming Process and Spray Formed High Speed Steel (HSS)

The process characteristics of the twin-nozzle-scanning spray forming were introduced in the paper briefly. Additionally, the microstructure of high-speed steels produced by spray forming was inspected using scanning electron microscopy (SEM, back diffraction morphology) and energy dispersive spectroscopic analyses (EDS). Without thermal isotropic pressure (HIP) and hot forge, at some position of spray deposited HSS billet some porosity was found, the forming reason of porosity was analyzed.