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Product containing CrNiTiAlN quinary coating and preparation method thereof

A product and coating technology, applied in the field of new PVD five-element coating, can solve the problems of coating application limitation, easy cracking, peeling, poor toughness, etc., and achieve the effect of improving the bonding strength of the film base

Active Publication Date: 2013-04-17
郎溪品旭科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of CrTiAlN coating on tools such as drill bits and turning tools has been widely recognized, but for molds, the application of this coating is limited
This is mainly because the working environment of die steel is extremely harsh, and the CrTiAlN coating itself has relatively large defects, such as its poor toughness, and it is easy to crack and peel off under impact load

Method used

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  • Product containing CrNiTiAlN quinary coating and preparation method thereof
  • Product containing CrNiTiAlN quinary coating and preparation method thereof
  • Product containing CrNiTiAlN quinary coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Base part pretreatment: Using H13 mold steel as the base part of the product, the base part of the product was ultrasonically cleaned in 10 g / L sodium hydroxide aqueous solution for 8 minutes, then ultrasonically cleaned in acetone for 9 minutes, and finally ultrasonicated in anhydrous ethanol After cleaning for 8 minutes, a pretreated product base was obtained.

[0030] (2) The (NiCrN-CrN-AlN-TiN) composite coating was deposited using a Teer-UDP850 / 4 closed-field non-equilibrium magnetron sputtering ion plating equipment (see the schematic diagram of the coating structure). figure 1 shown) the main steps are as follows:

[0031] 1) Turn on the machine to preheat, pass the cooling water, turn on the mechanical pump and pump the vacuum to 4.0×10 -4 Pa, and heat the vacuum chamber to 100°C;

[0032] 2) Pour in argon, adjust the valve and flowmeter of the gas cylinder, and adjust the air pressure in the vacuum chamber to make the target glow;

[0033] 3) Ion cleanin...

Embodiment 2

[0044] The pretreated H13 die steel was nitrided in a nitriding furnace at 570 ℃ for 8 hours, and then the NiCrN ternary coating was prepared by a Teer-UDP850 / 4 closed-field non-equilibrium magnetron sputtering ion plating equipment. Other operations and methods are the same as in Example 1. The thickness of the NiCrN-CrN composite coating in the product is 3 μm, that is, a product containing a NiCrN ternary coating is obtained.

[0045] The surface morphology of the samples was observed with a VEGA-3-S scanning electron microscope produced by Czech TESCAN Company, and the results are shown in Figure 4 , showing the nanocrystalline morphology of the CrNiTiAlN coating surface.

[0046] The HMV-1T microhardness tester was used to measure the microhardness value under a load of 10g, and the holding time was 10s. In order to reduce the error, the microhardness value of each sample is measured five times, and the arithmetic mean value of the five times is taken as the hardness va...

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Abstract

The invention discloses a product containing a CrNiTiAlN quinary coating. The product takes a Cr layer as a bottom layer and takes an NiCrN layer as a transition layer, wherein a plurality of NiCrN-CrN-AlN-TiN composite coatings with the thickness are deposited on the NiCrN layer, and the thickness of the composite coatings can achieve 2-5 mu m; and according to the product disclosed by the invention, a multi-layer gradient design and a nitriding process before film plating are adopted, so that a coating-substrate bonding strength is greatly improved, and the critical load of the prepared gradient coatings in a scratch test is as high as 68N, which is relatively higher than related plated layers prepared by other methods and processes. The hardness of the product containing the CrNiTiAlN quinary coating can achieve 2880HV; the anti-impact, wear-resistant and anti-friction performances and the thermal stability of the surfaces of a mold and a cutter are greatly improved, and the friction coefficient and the rate of weight loss caused by wear are greatly reduced; and the wetting angle of mold steel to an organic solvent is improved, thereby showing that the coating can be used for greatly improving the demolding performance of the mold.

Description

(1) Technical field [0001] The invention relates to a new type of PVD five-element coating, which is used for improving the surface hardness, surface thermal stability and impact wear resistance of cutting tools and moulds, greatly increasing the service life of cutting tools and moulds; The forming accuracy of the product is a product containing a CrNiTiAlN quinary coating and a preparation method thereof. Compared with similar preparation methods, the method has lower cost. (2) Background technology [0002] With the rapid development of the automobile industry, the demand for automobile accessories has increased substantially. Among them, the quality, output and production cost of the workpiece often depend on the quality and effective service life of the mold. However, under extremely harsh working conditions, early surface failures of die steel often occur. In order to prevent early failure of the mold and prolong the service life of the mold, the most economical and...

Claims

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Application Information

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IPC IPC(8): C23C14/06C23C14/35
Inventor 金杰田正磊李娜
Owner 郎溪品旭科技发展有限公司
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