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18 February 2009 Influence of compound laser life-extension treatment on mechanical properties of key parts of pellet traveling grate
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Abstract
An new composite strengthening and prolongation technique was discussed on the key components of pellet traveling grate, which are prone to thermal vibration fatigue, contact fatigue and wear resistance under the alternating high/low temperature. CO2 laser remelting was used to subject the key components of pellet traveling grate, improving the material's surface hardness, and the advanced surface treatment technique by utilizing intense laser shockwave was adopt. The impact of residual compressive stress generated by laser shock processing on fatigue life of surface cracks was discussed, and laser shock could effectively alleviate the residual stress at the surface and significantly improve the fatigue life and anti-stress corrosion performance. The result shows that composite laser treatment could effectively close up and repair cracks.
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X. D. Ren, Y. K. Zhang, A. X. Feng, S. C. Zhu, and X. L. Zhang "Influence of compound laser life-extension treatment on mechanical properties of key parts of pellet traveling grate", Proc. SPIE 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications, 727616 (18 February 2009); https://doi.org/10.1117/12.822148
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