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铁基Fe-Cr-Mo-C-B非晶合金具有高耐腐蚀性能和高硬度的特点,因而非常适合应用于表面及涂层材料,其较高的非晶形成能力使得采用激光表面处理技术获得理想非晶表面成为可能。采用激光表面熔化技术成功实现了Fe-CrMo-C-B合金的表面非晶化,研究了激光表面熔化工艺参数对合金表面非晶化的影响并建立了最佳工艺。发现合金经激光表面熔化处理后形成了从表面到基体的非晶层、非晶-晶体复合层和晶态基体的多层次结构,并探讨了其形成机理及与腐蚀行为和硬度的相关性。研究表明:Fe-Cr-Mo-C-B合金的硬度和腐蚀行为等表面性能显著依赖于其微观结构,激光表面熔化所获得的非晶表层表现出高硬度和优异的耐腐蚀性能。研究结果也为采用激光表面熔覆技术在其他金属材料表面制备具有实际应用价值的耐腐蚀、耐磨损Fe-Cr-Mo-C-B非晶合金涂层奠定了一定的理论和实验基础。
Iron-based Fe-Cr-Mo-CB amorphous alloy with high corrosion resistance and high hardness characteristics, and therefore very suitable for the surface and coating materials, its high amorphous ability to make use of laser surface treatment technology to achieve the ideal Amorphous surface becomes possible. The surface amorphization of Fe-CrMo-C-B alloy was successfully achieved by laser surface melting technology. The influence of laser surface melting process parameters on the surface of the alloy was studied and the best process was established. It was found that the multilayered structure of the amorphous, amorphous-crystalline composite and crystalline matrix from the surface to the substrate was formed after the laser surface melting treatment. The formation mechanism and the correlation between corrosion behavior and hardness were also discussed. The results show that the surface properties such as hardness and corrosion behavior of Fe-Cr-Mo-C-B alloy are significantly dependent on their microstructure. The amorphous surface obtained by laser surface melting shows high hardness and excellent corrosion resistance. The results also lay a solid theoretical and experimental foundation for the preparation of a practical coating of corrosion-resistant and wear-resistant Fe-Cr-Mo-C-B amorphous alloy coating on the surface of other metal materials by laser surface cladding technique.