| JIANG Tao.Effect of Bias-voltage on Physical Properties and Cutting GH4169 Performance of TiAlN Coatings[J],49(12):330-335 |
| Effect of Bias-voltage on Physical Properties and Cutting GH4169 Performance of TiAlN Coatings |
| Received:November 20, 2019 Revised:March 09, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2020.12.039 |
| KeyWord:AlTiN coatings substrate bias-voltage nano-hardness residual stresses crater wear high-temperature alloy cutting |
| Author | Institution |
| JIANG Tao |
Xiamen Golden Egret Special Alloy Co., Ltd, Xiamen , China |
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| Abstract: |
| The work aims to study the effect of different substrate bias-voltage on physical properties of TiAlN coatings, to obtain TiAlN coatings of superior cutting high-temperature alloy performance. TiAlN coatings were deposited on WC-Co cemented carbide substrate by multi-arc ion plating technology under different bias-voltage. The microstructure and composition were observed and analyzed by SEM and EDS. The phase structure and the residual stress were analyzed by XRD, and the nano-hardness (H), indentation modulus (E), factor of plastic deformation resistance (H3/E2), microhardness dissipation parameter (MDP) were tested by CSM nano-hardness tester. The cutting performance of AlTiN coatings of cutting high-temperature alloy as prepared was compared. Their failure modes of cutting were analyzed. The effect of coating properties on the crater wear failure was explored TiAlN coatings prepared under different bias-voltage showed a dense structure with NaCl face-centered cubic. The coating prepared under -40 V bias-voltage was (200) preferred orientation, while -120 V was (111) preferred orientation. The compressive residual stress of the coatings was increased with the increase of bias-voltage. The coating deposited under -40 V had lower hardness and larger MDP compared with coatings prepared under -80 V and -120 V. In cutting high temperature alloy GH4169, coating prepared under -80 V had stronger crater wear resistance, and showed equivalent performance to coatings prepared under -40 V and -120 V. For TiAlN coating, the balance of hardness and residual stress of coating prepared under –80 V can get excellent crater wear resistance. In cutting TiAlN, TiAlN deposited under -80 V exhibits more excellent cutting performance. |
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