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Multi-layer gradient structure coating for cutting tool and preparation method thereof

A cutting tool and gradient structure technology, applied in the field of multi-layer gradient structure coatings for cutting tools and their preparation, can solve the problems of insufficient strength and toughness, increased cutting resistance, degree of stickiness on the surface of the tool, peeling of the tool coating, etc. Achieve the effect of overcoming the incompatibility of wear resistance and toughness, excellent oxidation resistance and high temperature stability, and reducing sticky chips on the surface of the tool

Active Publication Date: 2021-10-26
ZHUZHOU HUARUI PRECISION CUTTINGS TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of hard coating has insufficient strength and toughness. Under the conditions of semi-machining and rough machining, the coating of the tool is prone to peeling and chipping, which will quickly aggravate the failure of the tool, and the processing efficiency and quality will also decrease. reduce
In addition, the friction coefficient between the surface of the coated tool and the processing material is high, which increases the cutting resistance and the degree of chip sticking on the tool surface. certain inapplicability
Chinese patent "Application No. 201711082887.3" reports a Mo-Se-Ta+TiAlTaN soft-hard composite coating tool and its preparation method. The surface layer is a Mo-Se-Ta soft coating, although this type of coating can reduce friction Lubrication, but due to its softness and insufficient wear resistance, it will be worn off quickly, and cannot continue to provide lubrication protection before the coated tool completely fails
At present, there are no reports of AlCrN, TiAlTaN, TiAlSiN multi-layer alternately deposited gradient structure coatings at home and abroad

Method used

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  • Multi-layer gradient structure coating for cutting tool and preparation method thereof
  • Multi-layer gradient structure coating for cutting tool and preparation method thereof
  • Multi-layer gradient structure coating for cutting tool and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] a kind of like figure 1 The shown multi-layer gradient structure coating tool of the present invention is composed of a tool substrate, 2 (AlCrN / TiAlTaN), 2 (AlCrN / TiAlTaN / TiAlSiN), and 2 (TiAlTaN / TiAlSiN) coatings from inside to outside. The total thickness is 3.18 μm.

[0038] The thickness of the 2 (AlCrN / TiAlTaN) coating is 0.82 μm, the thickness of the 2 (AlCrN / TiAlTaN / TiAlSiN) coating is 1.29 μm, and the thickness of the 2 (TiAlTaN / TiAlSiN) coating is 1.08 μm.

[0039] The 2 (AlCrN / TiAlTaN) composite coating includes AlCrN layers and TiAlTaN layers that are periodically deposited alternately from the inside to the outside, including two periods. The thickness of the single layer of AlCrN is 0.16 μm, and the thickness of the single layer of TiAlTaN is 0.25 μm.

[0040] 2 (AlCrN / TiAlTaN / TiAlSiN) composite coatings include AlCrN layers, TiAlTaN layers and TiAlSiN layers that are periodically deposited alternately from the inside to the outside, including two periods...

Embodiment 2

[0069] a kind of like figure 1 The shown multi-layer gradient structure coating tool of the present invention is composed of tool substrate, 80 (AlCrN / TiAlTaN), 80 (AlCrN / TiAlTaN / TiAlSiN), 50 (TiAlTaN / TiAlSiN) coating successively from inside to outside, and the coating The total thickness is 2.45 μm.

[0070] The thickness of 80 (AlCrN / TiAlTaN) coating is 0.78 μm, the thickness of 80 (AlCrN / TiAlTaN / TiAlSiN) coating is 1.19 μm, and the thickness of 50 (TiAlTaN / TiAlSiN) coating is 0.48 μm.

[0071] The 80 (AlCrN / TiAlTaN) composite coating includes AlCrN layers and TiAlTaN layers that are periodically deposited alternately from the inside to the outside, including 80 cycles, the thickness of the single layer of AlCrN is 4.3nm, and the thickness of the single layer of TiAlTaN is 5.5nm; 80( AlCrN / TiAlTaN / TiAlSiN) composite coatings include AlCrN layers, TiAlTaN layers and TiAlSiN layers that are periodically deposited alternately from the inside to the outside, including 80 cycle...

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Abstract

The invention provides a multilayer gradient structure coating for a cutting tool and a preparation method thereof. The coating comprises m(AlCrN / TiAlTaN) layers, n(AlCrN / TiAlTaN / TiAlSiN) layers and k(AlCrN / TiAlTaN / TiAlSiN) layers and k( TiAlTaN / TiAlSiN) layer, the thickness of the coating is 0.7-9 μm; wherein, m, n, k are modulation periods, 1≤m≤1500; 0≤n≤1000; 0≤k≤1500. The method includes: removing dirt on the surface of the cutting tool, and activating the surface of the cutting tool; using cathode arc ion plating technology to periodically and alternately deposit the above-mentioned coatings on the cutting tool substrate; Floor. The above-mentioned multi-layer gradient structure coating overcomes the contradiction that the traditional hard coating cannot have both wear resistance and toughness, and at the same time exhibits excellent oxidation resistance and high temperature stability.

Description

technical field [0001] The invention relates to the coating field of cutting tools, in particular to a multilayer gradient structure coating for cutting tools and a preparation method thereof. Background technique [0002] Coating technology is a revolution in the cutting field. By depositing a layer of high wear resistance and oxidation resistance coating on the surface of cutting tools, the service life of cutting tools, processing efficiency and surface quality of processed materials can be effectively improved. TiAlN coating is currently a widely used coating material due to its good oxidation resistance, mechanical properties and comprehensive performance. However, with the rapid development of modern manufacturing industry and the wide application of difficult-to-machine materials such as superalloys, titanium alloys and stainless steel alloys, advanced processing such as green, high-speed, high-efficiency and high-precision cutting for various difficult-to-machine mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/06C23C14/32
CPCC23C14/0021C23C14/0641C23C14/325C23C28/044
Inventor 张华栋林孝良肖旭凯高江雄
Owner ZHUZHOU HUARUI PRECISION CUTTINGS TOOLS CO LTD
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