铜元素对FeCr合金激光熔覆层性能影响及铣削加工减振机理研究
发布时间：2018-07-14 12:35
【摘要】：针对大型离心式管线压缩机叶片激光熔覆修复层难加工问题,进行激光熔覆减振合金配方与修复层铣削加工一体化工艺理论研究。使用添加不同质量分数铜元素的Fe Cr合金粉料在KMN钢基体上制备激光熔覆修复层;通过扫描电镜、X射线衍射仪及能谱分析仪对修复层微观组织及物相组成进行观察分析;对修复层显微硬度进行测试;对修复层室温干摩擦情况下的耐磨性进行测试;采集修复层侧铣过程中的振动信号,分析铜元素质量分数对修复层铣削振动及表面粗糙度的影响。结果表明,铜元素的加入起到细化晶粒的作用,含铜修复层的硬度、耐磨性均优于不含铜元素的修复层;含铜修复层铣削振动有显著降低,有效避免了颤振出现。
[Abstract]:Aiming at the difficult processing of laser cladding repair layer for large centrifugal pipeline compressor blade, the theoretical study on the formula of laser cladding damping alloy and milling process of repair layer is carried out. The laser cladding repair layer was prepared on KMN steel by adding Fe Cr alloy powder with different mass fraction of copper, and the microstructure and phase composition of the repair layer were observed and analyzed by scanning electron microscope (SEM) and X-ray diffraction (SEM) and energy spectrum analyzer (EDS). The microhardness of the repair layer is tested; the wear resistance of the repair layer under dry friction at room temperature is tested; the vibration signals of the repair layer during the side milling are collected and the effect of the mass fraction of copper on the milling vibration and surface roughness of the repair layer is analyzed. The results show that the addition of copper elements plays a role in grain refinement, the hardness and wear resistance of the repair layer containing copper are better than those of the repair layer without copper element, and the milling vibration of the repair layer containing copper is significantly reduced, which effectively avoids chatter.
【作者单位】： 山东大学机械工程学院;高效洁净机械制造教育部重点试验室;
【基金】：国家973计划(2011CB013403) 泰山学者建设工程资助
【分类号】：TG665;TG54
本文编号：2121659
[Abstract]:Aiming at the difficult processing of laser cladding repair layer for large centrifugal pipeline compressor blade, the theoretical study on the formula of laser cladding damping alloy and milling process of repair layer is carried out. The laser cladding repair layer was prepared on KMN steel by adding Fe Cr alloy powder with different mass fraction of copper, and the microstructure and phase composition of the repair layer were observed and analyzed by scanning electron microscope (SEM) and X-ray diffraction (SEM) and energy spectrum analyzer (EDS). The microhardness of the repair layer is tested; the wear resistance of the repair layer under dry friction at room temperature is tested; the vibration signals of the repair layer during the side milling are collected and the effect of the mass fraction of copper on the milling vibration and surface roughness of the repair layer is analyzed. The results show that the addition of copper elements plays a role in grain refinement, the hardness and wear resistance of the repair layer containing copper are better than those of the repair layer without copper element, and the milling vibration of the repair layer containing copper is significantly reduced, which effectively avoids chatter.
【作者单位】： 山东大学机械工程学院;高效洁净机械制造教育部重点试验室;
【基金】：国家973计划(2011CB013403) 泰山学者建设工程资助
【分类号】：TG665;TG54
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