Abstract Scope |
Three types of carbon steel (316L, 45 steel and GCr15 according to Chinese standard) with different contents of carbon were selected as raw materials for additive manufacture. Selective laser melting (SLM) and electron-beam melting (EBM) were employed to fabricate samples. Microstructure and properties of the samples prepared by different process techniques were investigated and compared. The influence of carbon content on the formability of carbon steel during additive manufacturing was studied. The results show that 45 steel (C:0.42~0.50 wt.%) fabricated by EBM presents the highest tensile stress, while SLMed GCr15 (C:0.95~1.05 wt.%) exhibits the best tribological performance due to its high microhardness. It is noticed that samples manufactured by EBM has less residual stress than those via SLM for the benefit of preheating process during EBM process. The formability of the carbon steel show close relation with its carbon content during SLM et EBM. |