Investigation of microstructure and properties of TiN-strengthened mooring chain steel
As a high-strength low-alloy (HSLA) steel, 22MnCrNiMo steel is widely utilized in critical marine engineering applications, such as offshore oil platforms, wind power installations, and naval vessels. The incorporation of second-phase particles in steel can significantly enhance its mechanical prope...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025019735 |
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| Summary: | As a high-strength low-alloy (HSLA) steel, 22MnCrNiMo steel is widely utilized in critical marine engineering applications, such as offshore oil platforms, wind power installations, and naval vessels. The incorporation of second-phase particles in steel can significantly enhance its mechanical properties. This study investigates the effects of varied TiN additions (0–0.24 wt. %) on the microstructure, phase composition, and mechanical performance of 22MnCrNiMo steel fabricated via selective laser melting (SLM). Experimental results indicated that the optimal comprehensive properties were achieved at a TiN content of 0.24 wt. % under the following SLM parameters: laser power of 175 W, scanning speed of 800 mm/s, layer thickness of 30 μm, and hatch spacing of 110 μm. The SLM-fabricated sample exhibited ultimate tensile strength (UTS) of 1416 MPa, yield strength (YS) of 1338 MPa, elongation of 9.7 %, and Charpy impact energy of 228.4 J. These findings elucidate the underlying mechanisms of microstructural evolution and mechanical property enhancements in TiN-modified 22MnCrNiMo steel processed by SLM, providing valuable insights for optimizing the performance of HSLA steels in demanding marine environments. |
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| ISSN: | 2590-1230 |