Acta Metallurgica Sinica (English Letters) ›› 2018, Vol. 31 ›› Issue (8): 807-814.DOI: 10.1007/s40195-018-0717-5
• Orginal Article • Previous Articles Next Articles
Received:
2018-11-30
Revised:
2018-01-16
Online:
2018-08-10
Published:
2018-07-27
Lin-Zhi Wang, Wen-Hou Wei. Selective Laser Melting of 30CrMnSiA Steel: Laser Energy Density Dependence of Microstructural and Mechanical Properties[J]. Acta Metallurgica Sinica (English Letters), 2018, 31(8): 807-814.
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Element | C | Si | Mn | Cr | Ni | Co | Mo | Cu | Fe |
---|---|---|---|---|---|---|---|---|---|
Composition (wt%) | 0.25 | 1.05 | 0.9 | 3.74 | 1.99 | 0.058 | 0.48 | 0.02 | Balance |
Table 1 Chemical composition of the 30CrMnSiA powder in this work
Element | C | Si | Mn | Cr | Ni | Co | Mo | Cu | Fe |
---|---|---|---|---|---|---|---|---|---|
Composition (wt%) | 0.25 | 1.05 | 0.9 | 3.74 | 1.99 | 0.058 | 0.48 | 0.02 | Balance |
Laser power (W) | Exposure time (μs) | Laser energy density (J mm-3) |
---|---|---|
170 | 130 | 43.59 |
180 | 130 | 46.15 |
190 | 130 | 48.72 |
200 | 130 | 51.28 |
200 | 160 | 63.12 |
Table 2 Laser power, exposure time and LEDs used in the SLM-processed 30CrMnSiA samples
Laser power (W) | Exposure time (μs) | Laser energy density (J mm-3) |
---|---|---|
170 | 130 | 43.59 |
180 | 130 | 46.15 |
190 | 130 | 48.72 |
200 | 130 | 51.28 |
200 | 160 | 63.12 |
Fig. 2 Microstructures of a the wrought 30CrMnSiA sample and the SLM-processed samples with different LEDs of b 43.59, c 46.15, d 48.72, e 51.28, f 63.12 J mm-3
Fig. 3 TEM images of a the wrought 30CrMnSiA sample, b the SLM-processed sample with an LED of 46.15 J mm-3. The insets present corresponding diffraction patterns in the white rectangles
Fig. 4 ICT images of the 30CrMnSiA samples, a cross section image map of a the wrought sample, b the SLM-processed sample with an LED of 46.15 J mm-3, the 3D image of cthe wrought sample, d the SLM-processed sample
Fig. 7 Tensile fracture morphologies of a the wrought 30CrMnSiA sample and the SLM-processed samples with different LEDs of b 43.59, c 46.15, d 48.72, e 51.28, f63.12 J mm-3
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