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等离子弧熔覆添加Al2O3+TiO2铁基合金涂层组织和耐磨性

Microstructure and wear resistance of plasma cladding Al2O3+TiO2/Fe alloy composite coating

    摘要
  • 摘要: 提出一种基于小波变换的焊缝截面形态建模方法。基于小波变换模极大原理提取了典型焊缝截面轮廓,分别采用三次样条、带约束的三次样条以及B样条曲线方法对提取的焊缝轮廓进行插值,并基于最小二乘法对插值后的焊缝边缘轮廓进行了数据拟合,得到了焊缝轮廓数学模型。结果表明,采用小波变换提取焊缝截面轮廓是可行的,带约束的三次样条曲线过渡平滑、无突变点,在该试验条件下得到的焊缝截面轮廓数学模型为正弦曲线。

     

    Abstract: Plasma cladding Ni-Cr-B-Si-Fe-based alloy coating and Fe-based alloy composite coating with Al2O3+TiO2 were obtained on the Q235 substrate, and microstructure, microhardness and wear resistance of the two coatings were investigated contrastively. The results show that the interface solidification form of Fe-based alloy composite coating with Al2O3+TiO2 have changed.They become small dendrite from primary lathy dendrite, and offer core for solidification.The microstructure is mainly based on γ 

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