The results show that gradient hard coatings on cermet substrate and the cohesion are ideal.Surface hardness is improved, but the transverse rupture strength does not change.

• 结果表明：多弧离子镀处理能在金属陶瓷表面形成硬质梯度薄膜，膜与基体的结合力良好，表面硬度大大提高，而材料的抗弯强度却没有发生变化。