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针对汽车发动机缸体、缸套、模具侧壁等垂直表面激光强化的需求 ,研制了垂直面送粉喷嘴和垂直面送粉激光强化系统 ,适合于内侧和外侧垂直面送粉激光熔覆和合金化及不送粉熔凝、相变硬化 ;利用该系统 ,选择合适的激光处理工艺参数 ,在垂直放置的灰铸铁表面进行了激光熔凝、送粉激光合金化、送粉激光熔覆等表面处理 ,分析了处理层的显微组织 ,合金元素成分分布与硬度分布。激光强化显著提高了基材的使用性能。垂直面送粉激光强化技术有良好的工业应用前景。
In order to meet the need of laser surface hardening on the vertical surfaces of automobile engine cylinder block, cylinder liner and mold sidewall, a vertical surface powder delivery nozzle and a vertical surface powder delivery laser enhancement system are developed, which are suitable for laser powder cladding and alloy feeding on the inside and outside vertical surfaces And without powder fusion, phase transformation hardening; the use of the system, select the appropriate laser processing parameters in the vertical placement of gray cast iron surface laser melting, powder feeding laser alloying, laser cladding powder feeding surface Processing, analysis of the treatment layer microstructure, alloy elements distribution and hardness distribution. Laser strengthening significantly improves the serviceability of the substrate. Vertical powder feeding laser enhancement technology has good prospects for industrial applications.