The austenitic stainless steel AISI 316L has been chosen as the material for orthodontic bracket. This paper reported our studies on the surface of the stainless steel 316L treated by laser heat input. We substantiated the effects of laser heat input including the microstructure, microhardness and corrosion resistance. The results showed that laser surface treatment not only refined grain, but also enhanced microhardness of the 316L orthodontic bracket at certain heat input. Through X-ray diffraction with Cu–Kα radiation, Cr0.19Fe0.7Ni0.11 was the main component phase. The corrosive characteristic of 316L orthodontic bracket with E = 0.67 kJ/cm was higher than that of the 316L without heat treatment.
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机译：奥氏体不锈钢AISI 316L已被选作正畸托槽的材料。本文报道了我们对通过激光热输入处理的316L不锈钢表面的研究。我们证实了激光热输入的影响，包括微观结构，显微硬度和耐腐蚀性。结果表明，在一定的热量输入下，激光表面处理不仅可以细化晶粒，而且可以增强316L正畸托槽的显微硬度。通过Cu-Kα射线的X射线衍射，Cr0.19Fe0.7Ni0.11是主要成分相。 E = 0.67 kJ / cm的316L正畸托槽的腐蚀特性高于未经热处理的316L。
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