应用激光, 2010, 30 (6): 442, 网络出版: 2011-03-24
送粉法激光强化合金灰铸铁气门座圈的工艺稳定性研究
Investigation on Process Stability of Laser Strengthening Exhaust Valve Ring by Feeding Powder
合金灰铸铁 气门座圈 送粉激光合金化 镍基复合涂层 gray cast iron exhaust valve ring powder feeding laser alloying nickelbase composite coating
摘要
在合金灰铸铁基体上利用新型镍基粉末进行侧向送粉激光合金化制备原位合成颗粒增强高镍复合涂层，探究适用于合金灰铸铁送粉激光合金化的工艺参数。在合金灰铸铁气门座圈表面利用侧向送粉激光合金化进行小批量试制。重点解决了气门座圈强化层出现的硬度过高、加工裂纹、气孔缺陷等问题，制备出无气孔缺陷、硬度较低，满足技术要求的强化层，实现对合金灰铸铁气门座圈的激光强化。
Abstract
The paper investigates the reinforcement of exhaust valve ring by powder feeding laser alloying with new Nibased powders. The influence of laser alloying process parameters to the organization, microstructure, hardness and defects of the alloy coatings on the surface of gray cast iron are investigated. Through optimize the process parameters and the ratios of powder, the technical problems of high hardness, cracks and porosity defects were solved.
马明星, 王雁启, 朱有慧, 杨林, 张伟明, 张红军, 刘文今. 送粉法激光强化合金灰铸铁气门座圈的工艺稳定性研究[J]. 应用激光, 2010, 30(6): 442. Ma Mingxing, Wang Yanqi, Zhu Youhui, Yang Lin, Zhang Weiming, Zhang Hongjun, Liu Wenjin. Investigation on Process Stability of Laser Strengthening Exhaust Valve Ring by Feeding Powder[J]. APPLIED LASER, 2010, 30(6): 442.
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