研究目的
Investigating the microstructural effect of laser cladding Titanium and Titanium boride on steel rail to improve wear resistance and longevity.
研究成果
Optimum hardness and best synergised microstructure of Titanium and Titanium boride were achieved at a mixed ratio of 50:50. This ratio provides the best rail longevity through laser cladding additive manufacturing techniques.
研究不足
The study focuses on the microstructural and hardness effects of laser cladding Ti and TiB2 on steel rail but does not address long-term wear performance under actual rail operating conditions.
1：Experimental Design and Method Selection:
Laser cladding technique was employed to deposit Ti and TiB2 powders on steel rail substrate at different mix ratios.
2：Sample Selection and Data Sources:
Steel rail plates (200 mm x 50 mm x 20 mm in size) were used as the substrate. Ti (
3：8% pure _87 μm), TiB2 (8% pure _87 μm) powders were used as protective covering materials. List of Experimental Equipment and Materials:
Scanning electron microscopy (SEM, JSM-7600F) with energy dispersive X-ray spectrometer (EDS), WAB Tubular Shaker, ytterbium laser system (YLS) of 2 kW maximum power, microhardness tester (QIV 1000Z), X-Ray diffractometry (XRD).
4：Experimental Procedures and Operational Workflow:
Powders were mixed at different ratios, sandblasted, cleaned with acetone, dried, and then laser cladded with specific parameters.
5：Data Analysis Methods:
Microhardness profiles were measured, and phases were analyzed with XRD.
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