Chao Xiang, Tao Zhang, Wenwei Wu, Zhihang Zou, Yongfei Sun, Jinpeng Liu, Xiaolei Xu, Enhou Han. Effect of Heat Treatment on Microstructure and Mechanical Properties of Selective Laser Melted 18Ni300 Maraging Steel[J]. Chinese Journal of Lasers, 2024, 51(16): 1602302
- Chinese Journal of Lasers
- Vol. 51, Issue 16, 1602302 (2024)
Fig. 1. Morphology and particle size distribution of 18Ni300 powder. (a) Morphology; (b) particle size distribution
Fig. 2. Dimension and shape of 18Ni300 tensile specimen
Fig. 3. Microstructures of 18Ni300 steel in different states. (a)‒(c) OM images; (d)‒(f) SEM images
Fig. 4. XRD patterns of 18Ni300 steel in different states. (a) DA2 state; (b) different states
Fig. 5. EBSD diagrams of 18Ni300 maraging in different states. (a)‒(c) Inverse pole figures (IPFs); (d)‒(f) phase distributions
Fig. 6. Rockwell hardness of 18Ni300 maraging in different states
Fig. 7. Tensile properties of 18Ni300 maraging steel in different states. (a) Engineering stress-engineering strain curves; (b) statistical histogram of tensile properties
Fig. 8. Relationship between reverse-austenite content and strength
Fig. 9. Tensile fracture morphology of 18Ni300 maraging steel in different states. (a) PS; (b) DA2; (c) SA2
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Table 1. Chemical composition of 18Ni300 maraging steel
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Table 2. Heat treatment process of SLM formed 18Ni300 maraging steel
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Table 3. Volume fraction of α and γ phases and hardness of 18Ni300 maraging steel after different heat treatments
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Table 4. Tensile properties of 18Ni300 maraging steel after different heat treatments
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