采用双扫描喷射成形炉制备了SFT15高速钢,对喷射成形SFT15的体密度、关键力学性能及其微观组织进行了研究.结果表明:SFT15沉积坯平均体密度为8.2g/cm3,达到理论密度的99.3％.采用双扫描喷射成形设备制备的SFT15高速钢晶粒细小,无宏观偏析,组织致密.经锻造热加工后,喷射成形SFT15高速钢的力学性能大幅提高,硬度达到HRC67.6,抗弯强度超过4200MPa.采用SEM研究SFT15的内部组织发现,SFT15高速钢内部包括均匀分布的细小碳化物.
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