TiSiN-WS2/Zr-WS2 coated cutting tool and preparation process thereof
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A zr-ws2, cutting tool technology, applied in the direction of metal material coating process, coating, layered products, etc., can solve the problems of high friction coefficient, low coating hardness, easy to wear and so on
Inactive Publication Date: 2014-09-24
SHANDONG UNIV
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[0003] The Chinese patent "Application No.: 200910256536.9" reports the periodic deposition of multi-coated cutting tools by physical vapor deposition and its preparation method. Each cycle of the coating includes a TiN layer to a TiSiN layer to a TiAlSiN layer to a TiSiN layer. The coating consists of Multiple cycles are superimposed; the tool coating has high hardness and wear resistance, which can improve tool life during cutting, but its friction coefficient is still high during dry cutting
The coated tool combines the high hardness, high wear resistance of ZrN coating and MoS 2 The lubricity of the coating improves the performance of the tool in the dry cutting process to a certain extent, but due to the 2 The hardness of the coating is low, and it is easy to wear under the high stress and high temperature environment of the cutting process, which reduces its self-lubricating effect
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Embodiment 1
[0020] TiSiN-WS 2 / Zr-WS 2 Coated tool and its preparation process. The base of the tool is YS8 cemented carbide turning tool. From the base to the surface of the tool, the order is: Ti+TiN transition layer, TiSiN layer, TiN+Ti+Ti / Zr+Zr transition layer, WS 2 / Zr layer, WS 2 layer. It is prepared by the method of multi-arc ion plating + intermediate frequency magnetron sputtering, and the specific steps are as follows:
[0021] (1) Pretreatment: Polish the substrate YS8 cemented carbide to the mirror surface, remove the surface contamination layer, and put
[0022] In alcohol and acetone, ultrasonically clean for 15 minutes each time to remove surface oil, and put it into the
[0023] Coating machine vacuum chamber, vacuum chamber background vacuum 7.0×10 -3 Pa, heat to 200°C, keep warm for 30min;
[0024] (2) Ion cleaning: Ar gas is introduced, the air pressure is 1.5Pa, the pulse bias power supply is turned on, the voltage is 800V, the duty cycle is 0.2, the glow clean...
Embodiment 2
[0032] TiSiN-WS 2 / Zr-WS 2Coated tool and its preparation process, the base of the tool is YG6X carbide twist drill, from the base to the surface of the tool are: Ti+TiN transition layer, TiSiN layer, TiN+Ti+Ti / Zr+Zr transition layer, WS 2 / Zr layer, WS 2 layer. It is prepared by the method of multi-arc ion plating + intermediate frequency magnetron sputtering, and the specific steps are as follows:
[0033] (1) Pre-treatment: Polish the substrate YG6X hard alloy, remove the surface contamination layer, put it in alcohol and acetone in turn, ultrasonically clean it for 15 minutes each time, remove the surface oil, and put it into the vacuum chamber of the coating machine after it is fully dried. Bottom vacuum 7.0×10 -3 Pa, heat to 200°C, hold for 50min;
[0034] (2) Ion cleaning: Introduce Ar gas, the air pressure is 1.5Pa, turn on the pulse bias power supply, the voltage is 900V, the duty cycle is 0.2, the glow cleaning is 15min, the bias voltage is reduced to 200V, the ...
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Abstract
The invention relates to a TiSiN-WS2 / Zr-WS2 coated cutting tool and a preparation process thereof. The matrix material of the TiSiN-WS2 / Zr-WS2 coated cutting tool is a hard alloy, and the cutting tool is prepared by adopting a multi-arc ion plating and intermediate-frequency magnetron sputtering combined method; and a coating is of a multilayer structure and sequentially comprises a Ti+TiN transition layer, a TiSiN layer, a TiN+Ti+Ti / Zr+Zr transition layer, a WS2 / Zr layer and a WS2 layer from the matrix to the surface coating of the tool, wherein the content of Zr element in the WS2 / Zr layer is gradually reduced from inside to outside. Due to the gradient change of Zr element in the WS2 / Zr layer, the hardness and the bearing capability of a lubricating layer are increased, a better transition between the TiSiN layer and the WS2 layer is achieved, and thus the lubricating effect is enhanced. The high hardness and high wear resistance of the TiSiN layer and the lubricating property of the WS2 coating are well combined, thereby preventing adhering, reducing a cutting force and a cutting temperature, reducing the abrasion of the tool, and prolonging the service life of the tool. The cutting tool can be widely applied to dry cutting and cutting of a difficult-to-machine material.
Description
1. Technical field [0001] The invention belongs to the technical field of mechanical cutting tool manufacturing, and in particular relates to a coating tool and a preparation process thereof. 2. Background technology [0002] As a superhard coating, TiSiN coating has extremely high hardness, oxidation resistance and wear resistance are also outstanding, and has been applied in cutting tools and other aspects. However, its friction coefficient is high, and high friction temperature is prone to occur during the friction process; in dry cutting processing, it is prone to sticking to the knife. WS 2 、MoS 2 , BN and other "soft" coatings have a very low coefficient of friction and very good self-lubricating properties, but their hardness is very low. During the cutting process, under the action of high stress and high temperature, they are easy to wear, which greatly limits their use in cutting tools. Applications. With the development of coating technology, diversification, ...
Claims
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