Component structure double-gradient functional coating for cutting tool and preparation method of component structure double-gradient functional coating

A cutting tool, dual gradient technology, applied in coating, metal material coating process, ion implantation plating and other directions, can solve the limited improvement of coating performance, affecting the overall stability of the coating and comprehensive service performance, coating The problem of reducing the adhesion between the layer and the coating is to achieve the effect of service reliability guarantee, good film-base adhesion, and excellent film-film adhesion.

Active Publication Date: 2020-06-12
ZHUZHOU HUARUI PRECISION CUTTINGS TOOLS CO LTD
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Problems solved by technology

On the one hand, the composite effect of multiple elements cannot be better comprehensively utilized, and the performance improvement of the coating is limited; on the other hand, the performance transition of the gradient coating with different components formed by superimposition at the junction of the two gradient layers also becomes crack initiation. Or the weak point that inhibits crack propagation, and the bonding force between coatings is reduced, which in turn affects the overall stability and comprehensive service performance of the coating

Method used

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  • Component structure double-gradient functional coating for cutting tool and preparation method of component structure double-gradient functional coating
  • Component structure double-gradient functional coating for cutting tool and preparation method of component structure double-gradient functional coating
  • Component structure double-gradient functional coating for cutting tool and preparation method of component structure double-gradient functional coating

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preparation example Construction

[0031] Correspondingly, the present invention also provides a method for preparing a composition-structure dual-gradient functional coating for cutting tools, which is characterized in that it comprises the following steps:

[0032] (1) Prepare the tool base and carry out grinding, sandblasting and polishing;

[0033] (2) Pretreatment of the tool substrate, including cleaning and drying, argon ion bombardment etching and activation treatment;

[0034] (3) Using cathodic arc ion plating technology to alternately deposit Ti on the tool substrate in different trends of decreasing and increasing 1-x- y Al x Me' y N layer and Ti 1-x-y Al x Me" y The N layer is naturally cooled to a temperature lower than 200°C under vacuum, and then released from the furnace to obtain a dual-gradient functional coating with composition and structure for cutting.

[0035] Wherein, the substrate bias of the cathodic arc ion plating technology is 30-150V, the target source current is 100-240A, ...

Embodiment 1

[0041] Deposition of Ti on Tool Substrate by Cathodic Arc Ion Plating Technology 0.3 Al 0.6 (BC) 0.1 N / Ti 0.3 Al 0.6 Si 0.1 N (B:C atomic ratio is 1:1, atomic composition is the theoretical design value) composition structure double-gradient functional coating, each adjacent Ti from the surface of the tool substrate 0.3 Al 0.6 (BC) 0.1 N layer and Ti 0.3 Al 0.6 Si 0.1 The N layer constitutes a period, and the total thickness of each period is m (m value is 0.6 μm), Ti 0.3 Al 0.6 (BC) 0.1 N layer and Ti 0.3 Al 0.6 Si 0.1 The variation of the thickness of the N layer by alkali and incremental deposition is n (the n value is 0.1 μm), and the fluctuation of the n value of each layer is ±10%. In this embodiment, by turning on and off different targets, the deposition time of different targets is controlled, and then the coating thickness of different components is gradually increased and decreased. The specific deposition process is as follows: the working gas N 2 A...

Embodiment 2

[0043] Deposition of Ti on Tool Substrate by Cathodic Arc Ion Plating Technology 0.3 Al 0.6 (BC) 0.1 N / Ti 0.3 Al 0.6 Si 0.1 N (B:C atomic ratio is 8:2, the atomic composition is the theoretical design value) composition structure double-gradient functional coating, starting from the surface of the tool substrate, every adjacent Ti 0.3 Al 0.6 (BC) 0.1 N layer and Ti 0.3 Al 0.6 Si 0.1 The N layer constitutes a period, and the total thickness of each period is m (m value is 0.02μm), Ti 0.3 Al 0.6 (BC) 0.1 N layer and Ti 0.3 Al 0.6 Si 0.1 The variation of the thickness of the N layer by alkali and incremental deposition is n (the n value is 0.005 μm), and the fluctuation of the n value of each layer is ±10%. In this embodiment, the evaporation ionization rate of different targets is controlled by the gradient change of the target source current, and then the coating thickness of different components is gradually increased and decreased. The specific deposition proce...

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Abstract

The invention provides a component structure double-gradient functional coating for a cutting tool and a preparation method of the component structure double-gradient functional coating. The coating is formed by alternately depositing two performance variation layers, namely a Ti<1-x-y>Al<x>Me'<y>N layer and a Ti <1-x-y>Al<x>Me"<y>N layer, on the surface of a tool base body in thickness progressive decreasing and processing increasing trends. The preparation method comprises the following steps that the tool base body is prepared; the tool base body is pretreated; and the Ti<1-x-y>Al<x>Me'<y>Nlayer and the Ti <1-x-y>Al<x>Me"<y>N layer are alternatively deposited on the tool base body in the different progressively decreasing and progressively increasing trends by adopting a cathodic arc ion plating technology to obtain the component structure double-gradient functional coating for cutting. Compared with a common-structure multi-element coating, the component structure double-gradientfunctional coating for the cutting tool has the advantages that the multi-element composite effect is maximized, the gradient structure design is optimized, the stress of the coating is reduced, the good film-base and film-film binding force is guaranteed, meanwhile, the wear resistance, the impact resistance and the thermal stability of the coating are further improved, the machining life of a correspondingly coated tool is also greatly prolonged, and the service reliability of the corresponding coated tool is also greatly improved.

Description

technical field [0001] The invention relates to the field of coating tools for cutting, in particular to a composition-structure dual-gradient functional coating for cutting tools and a preparation method thereof. Background technique [0002] In coating applications, simple single-layer coatings are no longer able to meet the stringent requirements of modern high-speed machining and difficult-to-machine materials on tool performance. Modern tool coating structures are developing in the direction of ultra-thick, multi-layer, and gradient structures. The design idea of ​​the gradient coating gradient comes from the concept of "functionally graded materials" proposed by Japanese scholars in the 1980s. Compared with traditional structural coatings, gradient structural coatings can provide a gentle transition between the thermal expansion coefficient and mechanical properties of the substrate and the coating, reduce the internal stress of the coating, improve the bonding force a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/32
CPCC23C14/0641C23C14/325C23C14/0021
Inventor 张华栋梅方胜林孝良肖旭凯高江雄袁铁锤俞洋
Owner ZHUZHOU HUARUI PRECISION CUTTINGS TOOLS CO LTD
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