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采用响应面设计方法对TiAlN涂层刀具强流脉冲电子束表面后处理工艺进行优化设计,结合回归统计建立硬质合金涂层刀具的表面粗糙度、硬度以及弹性模量数学模型。此外,分别对三个数学模型进行显著性分析,以揭示输入电压、输入电流和脉冲次数对涂层刀具表面粗糙度、硬度及弹性模量的影响。结果表明,强流脉冲电子束轰击过程中的输入电压、输入电流和脉冲次数对涂层刀具的表面粗糙度、硬度以及弹性模量均具有显著影响。通过多响应值进行优化,得到了最佳工艺参数组合。经此工艺条件处理后的TiAlN刀具表面粗糙度为0.17μm、显微硬度为33.39 GPa、弹性模量为660.20 GPa;切削实验结果表明,经处理后的TiAlN涂层刀具后刀面磨损量较未经处理的下降了60%左右。
The response surface design method was used to optimize the post-treatment process of TiAlN coated high current pulsed electron beam. The surface roughness, hardness and elastic modulus mathematical model of the carbide coated cutting tools were established by regression statistics. In addition, the saliency analysis of three mathematical models were carried out to reveal the influence of input voltage, input current and pulse number on the surface roughness, hardness and elastic modulus of the coated tool. The results show that the input voltage, the input current and the number of pulses during the bombardment of the intense pulsed electron beam have a significant effect on the surface roughness, hardness and elastic modulus of the coated tool. Optimized through multiple response values, the best combination of process parameters was obtained. The surface roughness of the TiAlN tool treated by this process was 0.17μm, the microhardness was 33.39GPa and the modulus of elasticity was 660.20 GPa. The results of the cutting experiments showed that the flank wear of the treated TiAlN coated tool was less than that of the untreated TiAlN coated tool Decreased by about 60% after treatment.