Influence of Process Parameters on Forming Defects of H13 Steel Processed by Selective Laser Melting

Jingang Xu; Yong Chen; Hui Chen; Bing Yang

doi:10.3788/LOP55.041405

Laser & Optoelectronics Progress, Volume. 55, Issue 4, 041405(2018)

Influence of Process Parameters on Forming Defects of H13 Steel Processed by Selective Laser Melting

Jingang Xu¹, Yong Chen¹, Hui Chen^、*, and Bing Yang¹

Author Affiliations

¹ School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China

¹ State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, Sichuan 610031, China

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Figures & Tables(10)

Fig. 1. Single-channel morphologies under different laser powers. (a) 250 W; (b) 300 W; (c) 350 W; (d) 400 W; (e) 450 W

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Fig. 2. Single-channel morphologies under different scanning speeds. (a) 800 mm?s-1; (b) 1000 mm?s-1; (c) 1200 mm?s-1; (d) 1400 mm?s-1; (e) 1600 mm?s-1

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Fig. 3. Effect of laser power on forming part quality.(a) 250 W; (b) 350 W; (c) 400 W; (d) 450 W

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Fig. 4. Effect of scanning speed on forming part quality. (a) 300 mm?s-1; (b) 400 mm?s-1; (c) 500 mm?s-1; (d) 800 mm?s-1; (e) 1200 mm?s-1

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Fig. 5. Effect of scanning spacing on forming part quality. (a) 40 μm; (b) 60 μm; (c) 70 μm; (d) 80 μm

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Fig. 6. Schematic of SLM scanning strategy. (a) Single X direction scanning; (b) Z-shaped orthogonal scanning; (c) S-shaped orthogonal scanning

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Fig. 7. Forming quality under different scanning modes. (a) S-shaped orthogonal scanning; (b) Z-shaped orthogonal scanning; (c) single X direction scanning

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Table 1. Compositions of H13 steel (mass fraction, %)
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Table 1. Compositions of H13 steel (mass fraction, %)
Element C Si Mn Cr Mo V P S
Content 0.32-0.45 0.80-1.20 0.20-0.50 4.75-5.50 1.10-1.75 0.80-1.20 ≤0.030 ≤0.030

Table 2. Single-layer single-channel forming parameters
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Table 2. Single-layer single-channel forming parameters
Parameter Laserpower /W Scanningspeed /(mm∙s^-1) Powderthickness /μm Spotdiameter /μm
Value 250-450 800-1600 40 100

Table 3. Multi-layer multi-channel forming parameters
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Table 3. Multi-layer multi-channel forming parameters
Parameter Laser power /W Scanning speed /(mm∙s^-1) Scanning pitch /μm Scanning method
Item 250-450 300-1600 40-80 Z-shaped orthogonal scanning,S-shaped orthogonal scanning,single X-direction scanning

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Jingang Xu, Yong Chen, Hui Chen, Bing Yang. Influence of Process Parameters on Forming Defects of H13 Steel Processed by Selective Laser Melting[J]. Laser & Optoelectronics Progress, 2018, 55(4): 041405

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