Study on cutting performance of DLC/TiAlN composite coated tools with liquid-phase-assisted laser textures

doi:10.16731/j.cnki.1671-3133.2025.03.001

Abstract

Abstract: In order to achieve high performance dry cutting of difficult-to-machine materials,the DLC/TiAlN composite coating tool with both antifriction and wear resistance was prepared by using TiAlN with high hardness and high bonding strength as the support layer and DLC coating with self-lubricating properties as the top layer. At the DLC/TiAlN interface, liquid-phase assisted laser texturing was performed to enhance the interlayer bonding strength.Using dry cutting 316 stainless steel test, 4 kinds of cutting tools,including TiAlN coated (NC) tool,untreated DLC/TiAlN composite coating (UC) tool,air laser treated DLC/TiAlN composite coating (AC) tool and liquid phase assisted laser treated DLC/TiAlN composite coating (LC) tool,were used to study cutting properties such as force/heat,chip morphology,coating peeling,tool bonding etc, when dry cutting stainless steel under different cutting parameters. The test results showed that the cutting forces of UC,AC and LC tools were reduced in different degrees compared with NC tools.When the cutting speed is 200 m/min,the total cutting force of LC tool was the lowest,which was reduced by 26.5 %. At the same time,the front and back tool face wear of LC tool was the least,and the coating integrity was the best.

Key words: DLC/TiAlN coatings, liquid-assisted, laser treatment, cutting performance

CLC Number:

LI Haishan, JIANG Mingjing, ZHANG Chuang, YIN Junhao, ZHANG Kedong. Study on cutting performance of DLC/TiAlN composite coated tools with liquid-phase-assisted laser textures[J]. Modern Manufacturing Engineering, 2025, 534(3): 1-8.

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