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Product containing NiCrN ternary coating and preparation method thereof

A product and coating technology, applied in the field of new PVD ternary 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 film base

Active Publication Date: 2013-04-10
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 CrTiN 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 tool and die steel is extremely harsh, and the CrTiN 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 NiCrN ternary coating and preparation method thereof
  • Product containing NiCrN ternary coating and preparation method thereof
  • Product containing NiCrN ternary coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Pretreatment of the base part: take He H13 mold steel as the product base part, ultrasonically clean the product base part in 10 g / L sodium hydroxide aqueous solution for 8 minutes, then ultrasonically clean it in acetone for 9 minutes, and finally clean it in absolute ethanol Ultrasonic cleaning for 8 minutes to obtain the pretreated product substrate.

[0031] (2) The NiCrN ternary coating was prepared by Teer-UDP850 / 4 closed-field unbalanced magnetron sputtering ion plating equipment (see the schematic diagram of the coating structure in figure 1 shown) the main steps are as follows:

[0032] 1) Turn on the machine to preheat, pass cooling water, turn on the mechanical pump to vacuum to 4.0×10 -4 Pa, and heat the vacuum chamber to 100°C;

[0033] 2) Introduce argon gas, adjust the gas cylinder valve and flow meter, and adjust the air pressure in the vacuum chamber to make the target glow;

[0034] 3) Ion cleaning: rotate the substrate, adjust the bias voltage ...

Embodiment 2

[0045] The pretreated H13 die steel was nitriding at 570°C for 8 hours in a nitriding furnace, and then a NiCrN ternary coating was prepared using Teer-UDP850 / 4 closed-field unbalanced 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, the product containing the NiCrN ternary coating is obtained, and the product containing the NiCrN ternary coating is used as a sample for performance testing.

[0046] The VEGA-3-S scanning electron microscope produced by the Czech TESCAN company was used to observe the surface morphology of the sample, and the results are shown in Figure 4 shown. Figure 4 The nanocrystalline morphology of the NiCrN ternary coating surface is shown.

[0047] 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, measure the m...

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Abstract

The invention discloses a product containing an NiCrN ternary coating. On the product, a Cr layer is used as a bottom layer, an NiCrN layer is used as a transition layer, and a plurality of NiCrN-CrN composite coatings are deposited on the NiCrN transition layer, so that the thickness of the composite coating reaches 2-5 mu m. By adopting the multilayer gradient design and nitriding technique before filming, the invention greatly enhances the film-base bonding strength of the coating. The critical load of the gradient coating prepared by the invention in a scarification test is up to 75N which is much higher than that of a related coating prepared by any other method or technique; and the hardness of the product containing an NiCrN ternary coating can reach 2780HV. The invention greatly enhances the shock resistance, abrasion resistance, friction resistance and heat stability on the surface of a mold or cutter, and greatly lowers the friction factor and weight loss rate by abrasion. The NiCrN ternary coating greatly enhances the wetting angle of mold steel for organic solvents, which indicates that the coating can greatly improve the demoldability of the mold.

Description

(1) Technical field [0001] The invention relates to a new type of PVD ternary coating, which is used to improve the surface hardness, surface thermal stability and impact wear resistance of tools and molds, greatly increase the service life of tools and molds; improve the mold release performance of mold surfaces, and improve plastic The forming accuracy of the product is a product containing NiCrN ternary composite coating and its preparation method. (2) Background technology [0002] With the rapid development of the automobile industry, the demand for automobile accessories has increased significantly. 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 often occur in die steel. In order to prevent early failure of the mold and prolong the service life of the mold, the most economical and effective way is to carry...

Claims

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Application Information

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IPC IPC(8): B32B9/04B32B15/04C23C14/35C23C14/06C23C14/16
Inventor 金杰安腾李晓
Owner 郎溪品旭科技发展有限公司
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