喷射成形GCr15钢过喷粉末的粒度大小不一,其中颗粒直径在50~100μm之间的颗粒占60%以上。大部分粉末颗粒呈球状或类球状,并且粉末越细小形状越规则。这些不同粒度过喷粉末的显微组织均以快速凝固的枝晶形态出现,随着粉末粒度的减小其显微组织越细化。 Spray forming GCr15 steel oversized powder particle size varies, including particles with a diameter of 50 ~ 100μm particles accounted for more than 60%. Most of the powder particles are spherical or spheroidal, and the finer the powder, the more regular the shape. The microstructures of these oversized powders with different particle sizes appeared in the form of rapidly solidified dendrites. The microstructures became finer with the decrease of particle size.