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首页> 外文期刊>Journal of Materials Engineering and Performance >Influence of laser hardening and resulting microstructure on fatigue properties of carbon steels
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Influence of laser hardening and resulting microstructure on fatigue properties of carbon steels

机译：激光淬火及其组织对碳钢疲劳性能的影响

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摘要

Cylindrical specimens of a CSN 12050 carbon steel, equivalent to the UNS G 10420 steel, with two different initial microstructures, normalized and heat treated, were surface processed without melting by a 2.5 kW, CO{sub}2 laser to study theeffects of laser-beam hardening and resulting microstructure on fatigue properties and mechanisms. Two configurations of circumferential laser passes were made, resulting in one and three separate surface hardened lines, respectively. Fatigue resistancewas studied using alternating bend tests. A detailed metallographic study and x-ray measurements of surface stresses were carried out. It was shown that the laser beam hardening under different conditions either reduced or slightly improved the fatiguelife.
机译：使用2.5 kW CO {sub} 2激光在不熔化的情况下对CSN 12050碳钢圆柱试样（等效于UNS G 10420钢，具有两种不同的初始微观结构，进行了规范化和热处理）进行了表面处理而未熔化，以研究激光的影响-束硬化以及由此产生的微观结构对疲劳性能和机理的影响。进行了两种配置的周向激光加工，分别产生了一条和三条单独的表面硬化线。使用交替弯曲试验研究了抗疲劳性。进行了详细的金相研究和表面应力的X射线测量。结果表明，在不同条件下的激光束硬化会降低或略微改善疲劳寿命。

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