Study on Effect of Selective Laser Melting on Formability of GCr15 High Carbon Steel

Liu Shifeng; Li Yunzhe; Zhang Zhichang; Zhang Guangxi; Yang Xin; Wang Yan

doi:10.3788/LOP57.211402

Laser & Optoelectronics Progress, Volume. 57, Issue 21, 211402(2020)

Study on Effect of Selective Laser Melting on Formability of GCr15 High Carbon Steel

Liu Shifeng¹, Li Yunzhe¹, Zhang Zhichang¹, Zhang Guangxi¹, Yang Xin², and Wang Yan¹

Author Affiliations

¹西安建筑科技大学冶金工程学院, 陕西西安 710055

²西安理工大学材料科学与工程学院, 陕西西安710048

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Abstract Get PDF(in Chinese)

Figures & Tables(13)

Fig. 1. Micromorphology of GCr15 powder. (a) Low magnification; (b) high magnification

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Fig. 2. Size distribution of GCr15 powder

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Fig. 3. Effect of laser power on relative density of GCr15 samples

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Fig. 4. Metallographic diagrams of GCr15 samples at different laser powers. (a) 70 W; (b) 85 W; (c) 100 W

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Fig. 5. Relative density of GCr15 samples at different scanning speeds

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Fig. 6. Metallographic diagrams of GCr15 samples at different scanning speeds. (a) 250 mm/s; (b) 300 mm/s; (c) 350 mm/s; (d) 400 mm/s

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Fig. 7. Result graph. (a) Relationship between volume energy density and density; (b) volume energy density is fitted linearly with the density

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Fig. 8. Microstructure of GCr15 sample. (a) Low magnification; (b) high magnification

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$X-ray diffraction patterns of GCr15 samples at different powers$

Fig. 9. X-ray diffraction patterns of GCr15 samples at different powers

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Table 1. Chemical composition of GCr15 powder
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Table 1. Chemical composition of GCr15 powder
Element C Cr Si H O N S Fe
Mass fraction /% 1.230 2.060 0.310 0.136 0.017 0.220 0.200 Balance

Table 2. Energy density under different parameters unit: J/mm³
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Table 2. Energy density under different parameters unit: J/mm³
Power /W Speed /(mm·s^-1)
250 300 350 400 450
70 93.3 77.8 66.7 - -
85 - - 81 70.8 63
100 133.3 111.1 95.2 83.3 74.1

Table 3. Density of samples under different parametersunit: %
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Table 3. Density of samples under different parametersunit: %
Power /W Speed /(mm·s^-1)
250 300 350 400 450
70 88.4 88.6 88.3 - -
85 - - 90.3 89.8 88.4
100 97.7 94.8 93.2 91.5 89.7

Table 4. [in Chinese]
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Table 4. [in Chinese]
Item Power/W
70 85 100
α-Fe 77.3 71.9 77.5
γ-Fe 22.7 28.1 22.5

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Liu Shifeng, Li Yunzhe, Zhang Zhichang, Zhang Guangxi, Yang Xin, Wang Yan. Study on Effect of Selective Laser Melting on Formability of GCr15 High Carbon Steel[J]. Laser & Optoelectronics Progress, 2020, 57(21): 211402

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