Ti/TiN/Zr/ZrN coating with a thickness of 18. 7 μm was deposited on TC11 substrate by multi-arc ion plating. Erosion resistance of titanium alloy and Ti/TiN/Zr/ZrN coating was evaluated using white a-lundum abrasive of 45 μm by micro-blasting equipment at the impact angle of 30° and 90°, and the erosion mechanism was also analysed. The results show that the multilayer coatings are broken when the erosion sand weight is 70 g at the impact angle of 30°, and the erosion depth of the coating is 21. 88 μm while titanium alloy is 269. 9 μm. The multilayer coatings are broken when the erosion sand weight is 20 g at the impact angle of 90°, and the erosion depth of the coatings is 8. 95 μm while titanium alloy is 46. 96 μm. The erosion mechanism of titanium alloy is micro-cutting at the impact angle of 30°and pitting at the impact angle of 90°, while multilayer coatings is micro-cutting and micro-cracks at the impact angle of 30°and micro-crack fracture at the impact angle of 90°.%采用多弧离子镀技术在TC11钛合金表面制备了厚度为18.7 μm的Ti/TiN/Zr/ZrN多层膜,用45 μm白刚玉通过微喷砂试验机评价TC11钛合金及Ti/TiN/Zr/ZrN多层膜在30°和90°攻角下的抗冲蚀性能,并分析其冲蚀机理.结果表明:30°攻角下,冲蚀砂量为70 g时,Ti/TiN/Zr/ZrN多层膜被冲破,此时该多层膜的冲蚀坑深度为21.88 μm,TC11钛合金基材为269.9 μm.90°攻角下,冲蚀砂量为20 g时,Ti/TiN/Zr/ZrN多层膜被冲破,此时该多层膜的冲蚀坑深度为8.95 μm,TC11钛合金基材为46.96 μm.30°攻角下,钛合金的冲蚀以微切削为主,多层膜以微切削和微断裂为主.在90°攻角下,钛合金的冲蚀以点坑冲蚀为主,多层膜以裂纹萌生扩展和点坑冲蚀的混合冲蚀为主.
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