(Cr,Ti,Al,Zr)N梯度膜性能优异.采用多弧离子镀技术,使用Ti-Al-Zr合金靶和Cr单质靶在高速钢表面制备(Cr,Ti,Al,Zr)N多元超硬梯度膜,利用扫描电镜、能谱、X射线衍射仪、硬度计、划痕仪对膜层形貌、成分、结构、硬度、附着力进行分析,并通过热震性能试验考察了膜层的抗热震性能.结果表明:制备的膜层为面心立方结构,择优生长取向为(220)面;与TiN,(Ti,Al)N,(Ti,Cr)N,(Ti,Al,Zr)N等硬质膜相比,制备的(Cr,Ti,Al,Zr)N多元梯度膜具有更高的硬度和膜/基附着力,硬度可达4 400 HV,膜/基附着力大于200 N,实现了从硬质膜到超硬膜的转变;膜层中N含量梯度可有效减少应力集中,Cr,Al含量的增加有利于提高膜层抗热震性能;负偏压对膜层硬度影响较大,对膜层成分、结构、抗热震性能影响较小,对膜/基附着力基本无影响.
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