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功率對激光熔敷Ni基WC涂層組織與硬度的影響
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北京工業(yè)大學材料科學與工程學院,北京工業(yè)大學材料科學與工程學院,北京工業(yè)大學材料科學與工程學院,北京工業(yè)大學材料科學與工程學院,北京工業(yè)大學材料科學與工程學院,北京首鋼機電有限公司

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感謝國家自然科學基金(51475005、51275006)和北京市教委科研項目(PXM2015-014204-500170)的資助。


The Influence of Power on Microstructure and Hardness of Laser Cladding Ni-based WC Coating
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School of Materials Science and Engineering,Beijing University of Technology,School of Materials Science and Engineering,Beijing University of Technology,School of Materials Science and Engineering,Beijing University of Technology,School of Materials Science and Engineering,Beijing University of Technology,School of Materials Science and Engineering,Beijing University of Technology,Beijing Shougang Machinery Co,LTD

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    摘要:

    利用6kW光纖激光器在Q235鋼板表面激光熔覆Ni基WC復合涂層。使用光學顯微鏡、掃描電子顯微鏡、能譜儀、顯微硬度計，研究了不同激光功率下熔覆層組織形態(tài)、成分和顯微硬度的變化規(guī)律。結(jié)果表明：WC部分發(fā)生溶解并與其他元素相互作用形成共晶物，析出后以塊狀、條狀、粒狀等形態(tài)存在；隨著激光功率的增加，熔覆層的高度、熔深和稀釋率逐漸增加，熔覆層平均硬度先增加后減小，當激光功率為2500W時能夠獲得最高硬度，可達基體硬度的5倍左右。

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    Abstract: Laser cladding Ni-based WC composite coating was fabricated on the surface of Q235 steel by using 6kW fiber laser. By using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and micro-hardness tester, we investigated the morphology, composition, and micro-hardness of composite coating in different laser power. The results show that WC particles partially dissolve and react with other elements to form eutectics, which exist in the shape of block, strip and grain. The cladding height, penetration and dilution of laser cladding coating increased gradually with the increase of laser power. Moreover, the average hardness of the coating increased first and then decreased with the increase of laser power. When the laser power was 2500W, cladding coating could get the highest hardness, which could reach 5 times of the matrix hardness.

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王開明,雷永平,符寒光,楊勇維,李慶棠,蘇振清.功率對激光熔敷Ni基WC涂層組織與硬度的影響[J].稀有金屬材料與工程,2017,46(11):3474~3478.[Wang-Kaiming, Lei-Yongping, Fu-Hanguang, Yang-Yongwei, Li-Qingtang, Su-Zhenqing. The Influence of Power on Microstructure and Hardness of Laser Cladding Ni-based WC Coating[J]. Rare Metal Materials and Engineering,2017,46(11):3474~3478.]
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  • 收稿日期:2015-08-10
  • 最后修改日期:2015-11-17
  • 錄用日期:2015-12-08
  • 在線發(fā)布日期: 2017-12-13
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