Wear-resistant and corrosion-resistant water jet nozzle

Abstract

The utility model provides a wear-resistant and corrosion-resistant water jet nozzle. The wear-resistant and corrosion-resistant water jet nozzle comprises a water jet nozzle and a Ni / CrNbTiMoZr / DLC composite coating deposited on the surface of an inner cavity of the water jet nozzle. The Ni / CrNbTiMoZr / DLC composite coating comprises a middle layer and a functional layer, the middle layer is deposited on the inner cavity of the water jet nozzle, and the functional layer is deposited on the middle layer. And the middle layer is a metal Ni layer. The Ni layer is deposited on the surface of the substrate through the direct-current magnetron sputtering technology and serves as a middle layer, and the binding force between the whole composite coating and the substrate is improved. The CrNbTiMoZr layer and the DLC layer are sequentially deposited on the surface of the Ni layer through the direct-current magnetron sputtering technology, the Ni / CrNbTiMoZr / DLC composite structure is formed by the CrNbTiMoZr layer and the DLC layer, the CrNbTiMoZr / DLC composite structure serves as a functional layer and has abrasion resistance and corrosion resistance, and the service life of the water jet nozzle is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to a water knife nozzle, which belongs to a wear-resistant and corrosion-resistant water knife nozzle. Background Art

[0002] With the continuous advancement of science and technology, all walks of life are seeking new ways to achieve high efficiency, low cost and reduce resource waste. As an innovative industrial processing technology, water jet technology has played a lot of roles in various material cutting scenarios and is constantly developing and improving.

[0003] Water jet cutting technology has been widely used in all walks of life. This technology allows water to be as sharp as a blade, controlling the water jet within the cutting range to achieve perfect cutting. The nozzle plays a decisive role. The high-pressure water jet device is centered on the nozzle. The nozzle is the direct device for forming the water jet, and the effect it can achieve directly determines the overall effect. At the same time, the nozzle is an important component of the water jet device, which not only controls the cutting speed of the water jet but also restricts other components of the system.

[0004] In the prior art, water jet cutting generates huge friction when water flows through the nozzle due to the high pressure, which affects the service life of the nozzle.

[0005] In 2004, the concept of high entropy alloy (HEA) was first proposed. High entropy alloy is a new type of solid solution alloy material, which is alloyed by 5 or more elements in equiatomic ratio or nearly equiatomic ratio, in which the molar content of each component is between 5% and 35%, and can form an alloy of high entropy solid solution. It has been found that high entropy alloys have the following four effects: high entropy effect in thermodynamics, slow diffusion effect in kinetics, lattice distortion effect in structure and "cocktail" effect in performance. The unique design concept of high entropy alloys makes it have thermodynamic properties superior to traditional alloys, such as high hardness, high strength, high toughness, corrosion resistance, thermal stability, etc. At the same time, due to the complex composition and global disorder, high entropy alloys have multi-principal element effects, showing relatively excellent comprehensive performance, and have high academic research value and application prospects. High entropy alloys (HEAs) have a unique multi-component element design. Based on the microstructural characteristics of high entropy alloys, HEAs tend to form face-centered cubic (fcc), body-centered cubic (bcc) or hexagonal closure structure solid solutions. In addition, due to the slow diffusion and severe lattice distortion of HEAs, they have excellent mechanical properties such as high strength, high hardness, high corrosion resistance and wear resistance. Therefore, HEAs show good application potential in various fields. Utility Model Content

[0006] The utility model aims to provide a wear-resistant and corrosion-resistant water jet nozzle to solve the problem of short service life of the nozzle in the background technology.

[0007] The utility model designs a new type of Ni / CrNbTiMoZr / DLC composite coating based on high hardness, high wear resistance and corrosion resistance on the inner surface of the ordinary stainless steel water jet nozzle to improve the service life of the water jet nozzle. The composite coating is composed of a Ni coating in direct contact with the substrate, a CrNbTiMoZr high entropy alloy coating and a DLC coating.

[0008] In order to achieve the above object, the utility model provides the following technical solutions:

[0009] A wear-resistant and corrosion-resistant water jet nozzle, comprising:

[0010] Water jet nozzles; and

[0011] A composite coating is deposited on the inner cavity surface of the water jet nozzle, the composite coating includes an intermediate layer bonded to the substrate of the inner cavity of the water jet nozzle, and a functional layer deposited on the intermediate layer, the intermediate layer is a metal Ni layer, and the functional layer includes a CrNbTiMoZr coating close to the intermediate layer and a DLC coating away from the intermediate layer.

[0012] Furthermore, the intermediate layer is prepared by single-target magnetron sputtering technology and has a thickness of 3 to 4 μm.

[0013] Furthermore, the CrNbTiMoZr layer is prepared by magnetron three-target co-sputtering technology and has a thickness of 2 to 3 μm.

[0014] Furthermore, the DLC coating is prepared by single-target magnetron sputtering technology and has a thickness of 1 to 1.5 μm.

[0015] Furthermore, the water jet nozzle is made of 304 stainless steel.

[0016] The beneficial effects of the utility model are:

[0017] The utility model deposits a Ni coating on the surface of a substrate by means of a DC magnetron sputtering technique, and the layer serves as an intermediate layer to enhance the bonding force between the entire composite coating and the substrate. The CrNbTiMoZr layer and the DLC layer are deposited on the surface of the Ni layer by means of a DC magnetron sputtering technique to form a Ni / CrNbTiMoZr / DLC composite coating therewith, and the CrNbTiMoZr / DLC composite coating serves as a functional layer and has wear and corrosion resistance. The utility model greatly increases the service life of a water jet nozzle by depositing a Ni / CrNbTiMoZr / DLC composite coating on the water jet nozzle.

[0018] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the preferred embodiments of the utility model are described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of Ni / CrNbTiMoZr / DLC composite coating.

[0020] Figure 2 This is a schematic diagram of the structure of the wear-resistant and corrosion-resistant water jet nozzle of the utility model.

[0021] Reference numerals:

[0022] 1-substrate, 2-Ni layer, 3-CrNbTiMoZr layer, 4-DLC layer, 5-water jet nozzle, 6-Ni / CrNbTiMoZr / DLC composite coating. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description, unless otherwise specified, the materials used can be obtained commercially. The technical solution of the utility model is further described below in conjunction with specific embodiments, but the utility model should not be limited to these embodiments. Unless otherwise specified, they can be replaced by other alternative features that are equivalent or have similar purposes. Unless otherwise specified, each feature is just an example of a series of equivalent or similar features. The terms used in the utility model, unless otherwise specified, generally have the meanings commonly understood by ordinary technicians in the field.

[0025] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Name Explanation

[0027] Single-target magnetron sputtering technology: is a thin film preparation technology that uses a magnetic field to control the ionization and deposition of sputtered materials on a substrate. Single-target magnetron sputtering refers to the use of only one target material for deposition in a magnetron sputtering system. In a single-target magnetron sputtering system, the target material is placed in a vacuum chamber and bombarded with an electron beam or ion beam to ionize the target material surface. These ions are then deposited on the substrate under the action of a magnetic field to form a thin film. Single-target magnetron sputtering technology has the advantages of high efficiency, strong controllability, and stable preparation process.

[0028] Magnetron three-target co-sputtering technology: It is a technology that uses magnetron sputtering technology to simultaneously use three targets of different materials to deposit on the target substrate. This technology can produce composite films with multiple physical and chemical properties. In the magnetron three-target co-sputtering technology, the plasma generated by magnetron sputtering extracts the surface atoms of the three different target materials to form an ion flow, which is deposited on the substrate surface to form a film. By controlling the deposition ratio and sequence of the three targets, the physical and chemical properties of the composite film can be controlled.

[0029] See also Figure 2 , which is a schematic structural diagram of a wear-resistant and corrosion-resistant water jet nozzle according to an embodiment of the utility model, including a water jet nozzle and a Ni / CrNbTiMoZr / DLC composite coating deposited on the surface of its inner cavity.

[0030] See also Figure 1 , which is a schematic diagram of the layer structure of the Ni / CrNbTiMoZr / DLC composite coating of the utility model. The Ni / CrNbTiMoZr / DLC composite coating includes an intermediate layer and a functional layer, wherein the intermediate layer is deposited on the substrate 1 of the inner cavity of the water jet nozzle, and the functional layer is deposited on the intermediate layer.

[0031] Furthermore, the intermediate layer is prepared by single-target magnetron sputtering technology and has a thickness of 3 to 4 μm.

[0032] In a preferred embodiment of the present invention, the intermediate layer is a metal Ni layer 2, which can improve the bonding force between the composite coating and the substrate 1. The metal Ni layer 2 is an existing material and can also be obtained by existing technical means. In this embodiment, the Ni layer 2 is formed on the substrate 1 by magnetron sputtering technology and the bonding force between the Ni layer 2 and the substrate 1 is strong. The preparation method of the Ni layer 2 has no effect on its performance and is not specifically limited here. It can also be prepared by other methods, which can be selected according to actual needs.

[0033] As described above, the functional layer is a CrNbTiMoZr / DLC composite coating 6, which includes a CrNbTiMoZr layer 3 close to the middle Ni layer and a DLC layer 4 far from the middle. The CrNbTiMoZr / DLC composite coating 6 has wear and corrosion resistance.

[0034] Further, the CrNbTiMoZr layer 3 is prepared by magnetron three-target co-sputtering technology, with a thickness of 2 to 3 μm. CrNbTiMoZr is an existing material. In this embodiment, the CrNbTiMoZr layer 3 is made of Cr-Mo alloy, Ti-Nb alloy and metal Zr. In other embodiments, other methods can be used, which have no effect on their performance and are not limited here. They can be selected according to actual needs.

[0035] The DLC coating is prepared by single-target magnetron sputtering technology, with a thickness of 1-1.5 μm. In this embodiment, pure graphite target is used as the target material, and other carbon sources can be used in other embodiments, which are not limited here and can be rotated according to actual needs.

[0036] In a preferred embodiment of the present invention, the water jet nozzle 1 is made of 304 stainless steel. In other embodiments, the water jet nozzle 1 can be made of other corrosion-resistant and high-strength materials.

[0037] The preparation process of the wear-resistant and corrosion-resistant water jet nozzle of the utility model:

[0038] In the first step, before the coating is deposited, the 304 stainless steel water jet nozzle substrate 1 is ultrasonically cleaned with ethanol and deionized water in sequence to remove oil and dust on the surface.

[0039] In the second step, a single-target magnetron sputtering technique was used to deposit a Ni layer 2 on the inner surface of the water jet nozzle substrate. The target material was 99.99% pure Ni metal. When the vacuum chamber pressure was lower than 1.0×10 -3 After 1.0 Pa, 99.99% argon (Ar) was introduced to make the vacuum pressure of the sputtering chamber 1.0 Pa. The working temperature was room temperature. DC sputtering was implemented with a sputtering power of 60 W, a bias voltage of 50 V, and a deposition time of 12 min.

[0040] In the third step, a CrNbTiMoZr layer 3 is deposited on the surface of the Ni layer 2 using a three-target synchronous magnetron sputtering technique: the stainless steel water jet nozzle substrate on which the Ni layer 2 is deposited is used as the substrate 1, and the three target materials are Cr-Mo alloy (atomic content ratio of 1:1), Ti-Nb alloy (atomic content ratio of 1:1), and metal Zr (purity 99.99%). When the vacuum chamber pressure is lower than 1.0×10- 3After 1.5 Å, 99.99% argon (Ar) is introduced to make the vacuum pressure of the sputtering chamber 0.5-0.9 Pa, the working temperature is room temperature, the sputtering power of the Cr-Mo alloy target is 80W, the sputtering power of the Ti-Nb alloy target is 95W, the sputtering power of the metal Zr target is 40W, the bias voltage is 90V, and the deposition time is 30min. Cr-Mo alloy, Ti-Nb alloy and metal Zr are all existing materials and can also be obtained by existing technical means. The preparation method of Cr-Mo alloy, Ti-Nb alloy and metal Zr has no effect on their performance, and is not specifically limited here. They can also be prepared by other methods, which can be selected according to actual needs.

[0041] In the fourth step, a DLC layer 4 is deposited on the surface of the Ni / CrNbTiMoZr composite layer prepared above by using a single target magnetron sputtering technique: a stainless steel water jet nozzle substrate on which a Ni / CrNbTiMoZr composite layer is deposited is used as a substrate 1, and a pure graphite target is used as a target. When the vacuum chamber pressure is lower than 1.0×10 -3 After 1.5 % argon (Ar) is introduced, the vacuum pressure of the sputtering chamber is 0.8 Pa, the working temperature is room temperature, DC sputtering is performed, the sputtering power is 30 W, the bias voltage is 70 V, and the deposition time is 22 min. The pure graphite target is an existing material and can also be obtained by existing technical means. The preparation method of the pure graphite target has no effect on its performance and is not specifically limited here. It can also be prepared by other methods and can be selected according to actual needs.

[0042] The inner surface of the wear-resistant and corrosion-resistant water jet nozzle of the utility model has a Ni / CrNbTiMoZr / DLC composite coating. The overall thickness of the composite structure coating is about 6 to 8.5 μm, and the coating structure is dense. The mechanical property test results are: the overall hardness of the composite coating is 35-38 GPa. The corrosion resistance test results are: the inner surface of the stainless steel water jet nozzle is immersed in a 3.5wt.% NaCl aqueous solution at room temperature for 720 hours without obvious rust spots and pits. It shows that the wear resistance and corrosion resistance of the inner surface of the stainless steel water jet nozzle deposited with the above-mentioned Ni / CrNbTiMoZr / DLC composite coating are good. The utility model deposits the Ni coating on the surface of the substrate 1 by DC magnetron sputtering technology. This layer serves as an intermediate layer to enhance the bonding force between the entire composite coating and the substrate 1. The CrNbTiMoZr coating 3 and the DLC coating 4 are deposited on the surface of the Ni layer 2 by direct current magnetron sputtering technology, forming a Ni / CrNbTiMoZr / DLC composite coating 6. The CrNbTiMoZr / DLC composite structure is used as a functional layer and has wear and corrosion resistance. The utility model greatly improves the service life of the water jet nozzle 1 by depositing the Ni / CrNbTiMoZr / DLC composite coating 6 on the water jet nozzle 1.

[0043] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A wear-resistant and corrosion-resistant water jet nozzle, characterized in that: include: Water jet nozzle; and A composite coating is deposited on the inner cavity surface of the water jet nozzle, the composite coating includes an intermediate layer bonded to the substrate of the inner cavity of the water jet nozzle, and a functional layer deposited on the intermediate layer, the intermediate layer is a metal Ni layer, and the functional layer includes a CrNbTiMoZr coating close to the intermediate layer and a DLC coating away from the intermediate layer.

2. The wear-resistant and corrosion-resistant water jet nozzle according to claim 1, characterized in that: The intermediate layer is prepared by single-target magnetron sputtering technology and has a thickness of 3 to 4 μm.

3. The wear-resistant and corrosion-resistant water jet nozzle according to claim 2, characterized in that: The CrNbTiMoZr layer is prepared by magnetron three-target co-sputtering technology and has a thickness of 2 to 3 μm.

4. The wear-resistant and corrosion-resistant water jet nozzle according to claim 3, characterized in that: The DLC coating is prepared by single-target magnetron sputtering technology and has a thickness of 1 to 1.5 μm.

5. The wear-resistant and corrosion-resistant water jet nozzle according to claim 1, characterized in that: The water jet nozzle is made of 304 stainless steel.

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