Selective laser sintering of single-phase powder Cr-V tool steel |
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| Authors: | A. I. Kovalev V. P. Mishina D. L. Wainstein V. I. Titov V. F. Moiseev N. K. Tolochko |
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| Affiliation: | (1) Surface Phenomena Researches Group (SPRG), Physical Metallurgy Institute, 9/23, 2-nd Baumanskaya str., 107005 Moscow, Russia;(2) Institute of Metallurgy, Russian Academy of Sciences, 117911 Moscow, Russia;(3) Moscow State Technological University STANKIN, Vadkovsky per., 3a, 111472 Moscow, Russia;(4) Institute of Technical Acoustics, National Academy of Sciences of Belarus, 210717 Vitebsk, Belarus |
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| Abstract: | Presented is positive experience from selective laser sintering (SLS) of cylindrical steel specimens (3.0% C, 3.0% Cr, 1.0% Si, 12.0% V, Fe balance) 30 mm long and 5 mm in diameter by rapid prototyping. It was demonstrated that monolithic steel material could be successfully fabricated by this technology. Differential thermal analysis (DTA), scanning electron microscopy (SEM), and x-ray diffractometry (XRD) were used to study the microstructure, phase, and chemical composition of the source material and obtained specimens. Low-melting cementite-based eutectic was found to provide the liquid phase sintering of powder tool steel. The porosity of the green sintered specimens did not exceed 5%. The mean hardness value of sintered specimens was 825 HV. |
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| Keywords: | powder tool steel rapid prototyping selective laser sintering |
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