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Method for improving adhesive force of AlCrN coating on surface of metal ceramic

A cermet, adhesion technology, applied in the direction of metal material coating process, coating, vacuum evaporation plating, etc., can solve the problem of low adhesion of surface coating, easy peeling of coating, difficulty of cermet surface coating, etc. Problems, to achieve good bonding strength, improve the effect of bonding force

Active Publication Date: 2022-06-28
SHANGHAI INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, for AlCrN coatings, there are problems such as the difficulty of coating the cermet surface, the low adhesion of the surface coating, and the coating is easy to fall off.

Method used

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  • Method for improving adhesive force of AlCrN coating on surface of metal ceramic
  • Method for improving adhesive force of AlCrN coating on surface of metal ceramic
  • Method for improving adhesive force of AlCrN coating on surface of metal ceramic

Examples

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Embodiment 1

[0030] A method for improving the adhesion of AlCrN coating on cermet surface. First, the cermet sample was placed in a homogeneous solution of 80mL, 15% methanol solution, 20mL, 37% concentrated hydrochloric acid and 0.2g, 70% ferric chloride, and the reaction was continued for 25min in a closed cell in a constant temperature water bath at 100°C , dissolve the trace metal oxides on the surface of the cermet, and expose the grains on the surface of the sample in a large area.

[0031] The pickled samples were placed in anhydrous ethanol and deionized water for 10 minutes, and then taken out and dried with dry nitrogen.

[0032] Pump the furnace chamber to a background vacuum of 1×10 -3 Pa. First, 200sccm of argon gas was poured into the furnace cavity, and the cermet substrate was etched under -650V bias for 15 minutes; the Cr target was connected to a current of 160A, and 100nm of Cr was deposited on the surface of the sample under -100V bias.

[0033] Then, 200sccm of argo...

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Abstract

The invention relates to a method for improving the adhesive force of an AlCrN coating on the surface of metal ceramic, which comprises the following steps: (1) pickling the surface of a metal ceramic sample to expose crystal grains on the surface of the sample, and then washing and drying the pickled metal ceramic sample; (2) the sample is placed in a furnace chamber of cathode arc ion plating equipment for autorotation, the furnace chamber is pumped to background vacuum of 1 * 10 <-3 > Pa, and a Cr base layer is deposited on the surface of the metal ceramic sample; (3) depositing a Cr layer on the Cr base layer; and (4) a CrN layer and an AlCrN layer are sequentially deposited on the Cr layer, and attachment of the AlCrN coating on the surface of the metal ceramic is completed. Compared with the prior art, the gradient composite coating has good bonding strength with a matrix.

Description

technical field [0001] The invention relates to the field of coating modification, in particular to a method for improving the adhesion of an AlCrN coating on a cermet surface. Background technique [0002] CrN coating is widely used in wear protection of cutting tools, gears, piston rings and stamping tools, and the effect is considerable. For example, Balzers, which is mainly used for coating, has launched coating milling cutters for processing nickel alloys and aluminum alloys. The processed products have high surface quality. [0003] Although the coating of CrN prepared by physical vapor deposition technology has many excellent characteristics and has been widely used in various fields, its low hardness and anti-abrasive wear ability make the coating prone to premature failure during use and cannot meet the requirements. Many emerging industrial applications require further improvements in coating performance. On the basis of the CrN film, a multi-component technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/02C23C14/06C23C14/16C23C14/32
CPCC23C14/021C23C14/022C23C14/025C23C14/325C23C14/16C23C14/0641C23C14/0021
Inventor 周琼杜俊龙张而耕黄彪陈强梁丹丹姚松骏
Owner SHANGHAI INST OF TECH