激光淬火对气缸套寿命的影响-（毕业论文设计）.docVIP

激光淬火对气缸套寿命的影响 山东交通学院毕业设计（论文） PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT 4 PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT 4 山东交通学院毕业设计（论文） 3 山东交通学院海运学院 激光淬火对气缸套寿命的影响 专 业　 轮机工程 届 别　 2014 学 号　 101612320 姓 名　 指导教师　 山东交通学院海运学院 二○一四年六月 摘 要 本文在综合分析了国内外激光加工技术的基础上，提出了柴油机缸套的激光淬火处理。其原理是利用高能量密度的激光束快速扫描工件，使被照射的金属以极快的速度升到高于相变点而低于熔化温度，当激光束离开被照射的部位时，由于热传导的作用，处于冷态的基体使其迅速冷却而进行自冷淬火，进而实现工件表面的相变硬化。 本文从理论上分析了柴油机缸套激光淬火的工艺参数，提出了几种形式的激光淬火硬化网纹图案和16V240ZJ柴油机气缸套淬硬带螺距的计算方法。探讨了激光淬火提高柴油机缸套使用寿命的机理，分析了激光淬火工艺温度。实验研究了16V240ZJ柴油机气缸套(硼合金铸铁)表面激光淬火中的激光参数对淬火强化结果的影响，测量了缸套激光淬火处理后的硬度，观察和分析了硬化层的组织、形态，并通过磨损试验，得出了激光淬火硬化的微观解释，验证了激光淬火可显著提高柴油机缸套的使用寿命。 关键词：激光淬火，柴油机缸套，使用寿命，硼合金铸铁，耐磨性 Abstract Based on the comprehensive analysis of?domestic and international?laser processing technology,?the laser?quenching?machine?cylinder of diesel engine .The principle is the use of a laser beam scanning the work piece with high energy density, so that the irradiated metal in order to speed up above the transition point and lower than the melting temperature, when the laser beam from the irradiated area, due to the role of heat conduction in the substrate, cold the rapid cooling and self quenching then, the phase transformation hardening work piece table. This paper analyses the technical parameters of laser quenching cylinder diesel engine in theory, puts forward the calculation method of reticulate pattern hardening laser quenching several forms of 16V240ZJ diesel engine cylinder liner hardened with pitch. To investigate the mechanism of laser hardening can improve the service life of diesel engine cylinder liner, analyzed the temperature of laser quenching technique. Experimental study of 16V240ZJ diesel engine cylinder sleeve (boron alloy cast iron) effect of laser parameters of laser hardening of the surface of the cylinder liner of hardening, laser quenching after measuring the hardness, the observation and analysis of the hardening