CrN-Cr gradient coating on 45 steel surface and preparation method and application of CrN-Cr gradient coating

A gradient coating, crn-cr technology, applied in the coating, metal material coating process, ion implantation plating, etc., can solve the problems of poor bonding force of the film base, insufficient wear resistance, etc., to protect the base material, Combining good effects with performance

Pending Publication Date: 2021-10-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of insufficient wear resistance of 45 steel substrate and poor binding force of traditional hard coating film base, and provides a CrN-Cr gradient coating on the surface of 45 steel and its preparation method and application; that is, it is prepared on the surface of 45 steel CrN-Cr gradie

Method used

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  • CrN-Cr gradient coating on 45 steel surface and preparation method and application of CrN-Cr gradient coating
  • CrN-Cr gradient coating on 45 steel surface and preparation method and application of CrN-Cr gradient coating
  • CrN-Cr gradient coating on 45 steel surface and preparation method and application of CrN-Cr gradient coating

Examples

Experimental program
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Example Embodiment

[0032] Example 1

[0033] like figure 1 (A), a 45 steel surface CRN-Cr gradular coating is prepared by a double-fragrant plasma surface technique, and the surface of the coating is a CRN layer, the thickness is 7 μm; the interior of the coating is Cr, N diffuses Layer, thickness is 20 μm.

[0034] The preparation method of the above 45 steel surface CRN-Cr gradular coating includes the following steps:

[0035] Step 1, matrix material pretreatment

[0036] Preparing 45 steel, the matrix sample is ground graded with different types of sandpaper, and the mechanical polish is formed into a smooth mirror. Finally, the ultrasound cleaning, spare, spare, 200 #, 1500 in a beaker containing anhydrous ethanol. #, 2000 # model of sandpaper is graded step by step;

[0037] Step 2, cleaning and placing the workpiece

[0038] The inner wall of the vacuum furnace and the surface of the target are used to remove the surface oxide film and impurities, and then use the dust-free cloth to remove an...

Example Embodiment

[0050] Example 2

[0051] like figure 1 (B), a 45 steel surface CRN / Cr grader coating is prepared by a double-rai plasma surface technology, and the surface of the coating is a CRN deposition layer, the thickness is 6 μm; the interior of the coating is Cr, N diffusion Layer, thickness is 15 μm.

[0052] The preparation method of the above 45 steel surface CRN-Cr gradular coating includes the following steps:

[0053] Step 1, matrix material pretreatment

[0054] Preparing 45 steel, the matrix sample is ground graded with different types of sandpaper, and the mechanical polish is formed into a smooth mirror. Finally, the ultrasound cleaning, spare, spare, 200 #, 1500 in a beaker containing anhydrous ethanol. #, 2000 # model of sandpaper is graded step by step;

[0055] Step 2, cleaning and placing the workpiece

[0056] The inner wall of the vacuum furnace and the surface of the target are used to remove the surface oxide film and impurities, and then use the dust-free cloth to r...

Example Embodiment

[0068] Example 3

[0069] like figure 1 (C), a 45 steel surface CRN / Cr grader coating is prepared from a 45 steel surface using a Shuanghui plasma surface technology, and the surface of the coating is a CRN deposition layer, the thickness is 7 μm; the coating is Cr, N diffuses Layer, thickness at 14 μm.

[0070] Preparation method of 45 steel surface CRN / Cr gradular coating, including the following steps:

[0071] Step 1, matrix material pretreatment

[0072] Preparing 45 steel, the matrix sample is ground graded with different types of sandpaper, and the mechanical polish is formed into a smooth mirror. Finally, the ultrasound cleaning, spare, spare, 200 #, 1500 in a beaker containing anhydrous ethanol. #, 2000 # model of sandpaper is graded step by step;

[0073] Step 2, cleaning and placing the workpiece

[0074] The inner wall of the vacuum furnace and the surface of the target are used to remove the surface oxide film and impurities, and then use the dust-free cloth to re...

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Abstract

The invention discloses a CrN-Cr gradient coating on 45 steel surface and a preparation method and application of the CrN-Cr gradient coating. The gradient coating deposited on the 45 steel surface is obtained through a double glow plasma surface technology, and the CrN/Cr gradient coating comprises a Fe, Cr and N diffusion layer close to the side of a substrate and an outer CrN layer; the thickness of the diffusion layer is 10-20 microns, Fe, Cr and N elements in the diffusion layer are diffused, the Fe element is diffused from the substrate to the coating, and the Cr and N elements are diffused from the coating to the substrate; and the thickness of the CrN layer is 5-20 microns, the N element diffuses from the coating to the substrate, and the content of the N element is gradually reduced. The CrN/Cr gradient coating has good binding force with the 45 steel substrate, and reduces damage and failure caused by property difference between coating substrates, so that the effects of protecting the substrates and prolonging the service life are achieved, and the CrN/Cr gradient coating is suitable for connecting rods, gears, shafts or other steel parts which are likely to generate frictional wear.

Description

technical field [0001] The invention belongs to the field of 45 steel surface treatment, and in particular relates to a CrN-Cr gradient coating on the surface of 45 steel, a preparation method and application thereof. Background technique [0002] 45 steel is a medium-carbon high-quality structural steel widely used in engineering. After quenching and tempering, it is often used to manufacture transmission parts with high strength requirements such as connecting rods, gears, and shafts. However, complex and harsh working conditions will cause severe wear on the surface of 45 steel. With the development of modern industry, the contradiction between the continuous improvement of equipment requirements and the insufficient surface performance of parts has gradually emerged. Under the conditions of high speed, high temperature, high pressure, heavy load, and corrosive media, the damage of parts and materials often starts from the surface, such as wear, corrosion, high temperatu...

Claims

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Application Information

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IPC IPC(8): C23C14/38C23C14/16C23C14/06
CPCC23C14/34C23C14/0036C23C14/16C23C14/0641
Inventor 梁文萍亓艳林浩缪强易锦伟史伟伟马海瑞
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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