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AlCrSiN coating with intermediate layer with Si content gradient change, and preparation method

A gradient change, intermediate layer technology, applied in the field of AlCrSiN coating preparation of the intermediate layer, to achieve low friction coefficient, easy industrial production, and good high temperature stability

Active Publication Date: 2018-06-05
ANHUI DUOJINTUCENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Previous reports mainly improved the cutting performance of tool coatings by adjusting and designing the working layer in direct contact with the material to be cut, and improved the AlCrSiN gradient tool coating by using the intermediate layer with Si content, structure and grain size gradient changes. The method of layering has not been reported yet, and the high-speed steel tool with AlCrSiN gradient coating reinforced by the intermediate layer with Si content gradient change can be applied to the cutting of high-hardness steel materials under high-speed conditions.

Method used

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  • AlCrSiN coating with intermediate layer with Si content gradient change, and preparation method
  • AlCrSiN coating with intermediate layer with Si content gradient change, and preparation method
  • AlCrSiN coating with intermediate layer with Si content gradient change, and preparation method

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Experimental program
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Effect test

Embodiment 1

[0027] The preparation method of the AlCrSiN composite coating tool cutting life coating of the present embodiment is as follows:

[0028] Fix the pretreated high-speed steel cutter evenly on the turntable in the furnace cavity, control the rotation speed of the turntable to 3rpm, and pump to a background vacuum of 1×10 -4 ~2×10 -4 Pa, turn on the heater at the same time, and raise the temperature to 480°C;

[0029] Open the Ar gas flow valve, control the vacuum in the furnace chamber to about 4.0Pa, reduce the negative bias of the substrate to -180V, turn on the cylindrical Ti target as the arc target, and control the target current to 80A to complete the high-energy ion bombardment on the surface of the substrate. Etching cleaning, cleaning time 45min;

[0030] Cylindrical Ti target closed, N open 2 The flow valve controls the negative bias voltage of the substrate to -60V, adjusts the vacuum in the furnace chamber to about 3.5Pa, and the N 2 Input in the way of constant...

Embodiment 2

[0036] The composite coating in this embodiment does not use an intermediate layer, and the AlCrSiN composite coating consists of an AlCrN primer layer and an AlCrSiN working layer, which is denoted as AlCrSiN-1. Concrete preparation process is as follows:

[0037]Fix the pretreated high-speed steel cutter evenly on the turntable in the furnace cavity, control the rotation speed of the turntable to 3rpm, and pump to a background vacuum of 1×10 -4 ~2×10 -4 Pa, turn on the heater at the same time, and raise the temperature to 480°C;

[0038] Open the Ar gas flow valve, control the vacuum in the furnace chamber to about 4.0Pa, reduce the substrate negative bias to -180V, turn on the cylindrical Ti arc target, control the target current to 80A, and complete the etching of the substrate surface by high-energy ion bombardment Cleaning, the cleaning time is 45min;

[0039] Close cylindrical Ti arc target, open N 2 The flow valve controls the negative bias voltage of the substrate...

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Abstract

The invention discloses an AlCrSiN coating with an intermediate layer with a Si content gradient change, and a preparation method. The coating is prepared from an AlCrSiN working layer, the intermediate layer, and an AlCrSiN priming coat from a surface to a base material in sequence; from the AlCrSiN priming coat to the AlCrSiN working layer, the Si content of the intermediate layer is sequentially increased from 1 percent by weight to 5 percent by weight, an organization structure is prepared from a coarse columnar crystal, a fine columnar crystal and a fine isometric crystal in sequence, andthe grain size is reduced to 20nm from 60nm. According to a cutter manufactured by using the coating provided by the invention, a cutting test shows that the working durability of the coating cutteron a high-speed steel substrate can be improved by 2 times or more, the mechanical wear resistance and the high temperature oxidation resistance are greatly improved, the requirement of high-speed processing on the cutter material can be met, and the coating has great market potential and use value.

Description

technical field [0001] The invention relates to a modification method of an AlCrSiN composite coating tool, in particular to an AlCrSiN coating and a preparation method of an intermediate layer with a gradient change in Si content. Background technique [0002] With the development of science and technology, the machining industry has put forward higher requirements for cutting tools. The manufacturing concept of high efficiency, composite and environmental protection has been widely mentioned, and hard coatings have been widely used in cutting tools. At the same time, the processed workpiece and environmental protection issues have put forward higher requirements for cutting processing: faster cutting speed, higher workpiece surface quality and less or no cutting fluid used in the cutting process. The emergence of coated tools has further improved the high-speed cutting performance of the tool. It combines a substrate with high strength and good toughness with a hard film s...

Claims

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Application Information

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IPC IPC(8): C23C14/34C23C14/06C23C14/02
CPCC23C14/0084C23C14/022C23C14/0641C23C14/3464C23C28/044C23C28/048
Inventor 张世宏高营蔡飞张林方炜王启民
Owner ANHUI DUOJINTUCENG TECH CO LTD
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