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Effect of rare earth oxide on the properties of laser cladding layer and machining vibration suppressing in side milling

机译：稀土氧化物对激光熔覆层性能和侧铣削加工振动抑制的影响

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摘要

Laser cladding, which can increase the hardness and wear resistance of the used components, is widely used in remanufacture and sustainable manufacturing field. Generally, laser cladding layer should to be machined to meet the function as well as the assembly requirements. Milling is an effective mean for precision machining. However, there exist great differences of physical and mechanical performances between laser cladding layer and substrate material, including microstructure, hardness, wear resistance, etc. This produces some new milling problems for laser cladding layer, such as machining vibration which may lead to low productivity and worse surface integrity. Thus, it is necessary to develop a novel laser cladding powder which can improve the surface hardness and wear resistance, while reducing the machining vibration in milling. Laser cladding layer was prepared by FeCr alloy and La_2O_3 mixed powder. The effect of La_2O_3 on the coating properties was investigated. Signal analysis methods of the time and frequency domain were used to evaluate the effect of the La_2O_3 on machining vibration in the side milling laser cladding layer. The key findings of this study are: (a) with the La_2O_3 content increasing, the grain size decreases dramatically and the microstructure of laser cladding layer are refine; (b) the hardness and wear resistance of the coatings with La_2O_3 are improved significantly; and (c) the machining vibrations of laser cladding layer with La_2O_3 are obviously reduced and the chatter is effectively avoided occurring.
机译：激光熔覆可提高所用组件的硬度和耐磨性，被广泛用于再制造和可持续制造领域。通常，应加工激光熔覆层以满足功能和组装要求。铣削是进行精密加工的有效手段。然而，激光熔覆层与基材之间的物理和机械性能存在很大差异，包括微观结构，硬度，耐磨性等。这给激光熔覆层带来了一些新的铣削问题，例如加工振动，可能导致生产率降低。和更差的表面完整性。因此，有必要开发一种新型的激光熔覆粉末，该粉末可以改善表面硬度和耐磨性，同时减少铣削中的加工振动。用FeCr合金和La_2O_3混合粉制备激光熔覆层。研究了La_2O_3对涂层性能的影响。利用时域和频域的信号分析方法，评价了La_2O_3对侧面铣削激光熔覆层加工振动的影响。这项研究的主要发现是：（a）随着La_2O_3含量的增加，晶粒尺寸急剧减小，激光熔覆层的微观结构得到改善； （b）La_2O_3涂层的硬度和耐磨性得到明显改善； （c）明显降低了La_2O_3激光熔覆层的加工振动，有效避免了颤动的发生。

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  • 来源
    《Applied Surface Science》 |2014年第1期|387-395|共9页
  • 作者

    Yanhua Zhao; Jie Sun; Jianfeng Li;

  • 作者单位

    School of Mechanical Engineering, Shandong University, Jinan 250061, PR China, Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, Shandong University, Jinan 250061, PR China;

    School of Mechanical Engineering, Shandong University, Jinan 250061, PR China, Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, Shandong University, Jinan 250061, PR China;

    School of Mechanical Engineering, Shandong University, Jinan 250061, PR China, Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, Shandong University, Jinan 250061, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Rare earth; Laser cladding layer; Grain refine; Side milling; Machining vibration suppressing;

    机译：稀土;激光熔覆层;晶粒细化;侧铣;机械振动抑制;

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