CN103981498A - Method for improving wear resistant property of metal material - Google Patents

Abstract

The invention discloses a method for improving the wear resistance of metal materials. The steps of the method are to use magnetron sputtering technology to deposit a layer of pure aluminum with a thickness of 20-30 microns on the surface of metal materials; use micro-arc oxidation technology to deposit The pure aluminum layer is partially micro-arc oxidized, and the thickness of the micro-arc oxidized film is in the range of 10-15 microns; the finally obtained micro-arc oxidized film mainly composed of aluminum oxide has good wear resistance. The advantages of the present invention are: the combination between the aluminum oxide-based micro-arc oxidation film and the magnetron sputtered aluminum layer and between the magnetron sputtered aluminum layer and the substrate prepared by the method is excellent and low in cost, and can be applied to Metal materials with iron as the main content and metal materials with titanium as the main content have a wide range of applications and have important application value and promotion value.

Description

A method of improving the wear resistance of metal materials

technical field

The invention relates to the fields of material science, friction and wear, and in particular to a method for improving the wear resistance of metal materials.

Background technique

Metal materials with iron as the main content and metal materials with titanium as the main content have low hardness, the Vickers hardness is generally less than 1000, and the wear resistance is poor, especially the metal materials with titanium as the main content have a large friction coefficient Sexuality has become one of the main reasons limiting its wide application. Alumina ceramic materials have the characteristics of high hardness, Vickers hardness up to 1500-2000, and excellent wear resistance. As wear-resistant coating materials, they are widely used in the field of surface protection of metal materials. At present, there are two main techniques for the preparation of aluminum oxide protective coatings on the surface of metal materials: one is to use thermal spraying technology to prepare aluminum oxide coatings on the surface of metal materials, but the coating has large thickness, high brittleness, high roughness and porosity. , The combination with the substrate is not good; the second is to use micro-arc oxidation technology to prepare a protective coating mainly composed of alumina on the surface of aluminum alloy, which is widely used.

Magnetron sputtering technology is currently the most widely used sputtering deposition technology. It is based on the two-pole DC sputtering, adding a magnetic field near the target surface. Due to the action of electric field and magnetic field, electrons do spiral motion, which greatly improves the life of electrons and increases the ionization yield, so that the degree of ionization in the discharge area increases, that is, the density of ions and electrons increases, and metal coatings can be prepared on the surface of metal materials. layer, nitride coating, oxide coating, etc. The present invention skillfully utilizes magnetron sputtering technology and micro-arc oxidation technology, first utilizes magnetron sputtering technology to deposit a layer of pure aluminum with a thickness of 20-30 microns on the surface of the metal material, and then utilizes micro-arc oxidation technology to deposit this layer The pure aluminum layer is partially micro-arc oxidized, and the thickness of the micro-arc oxidized film ranges from 10 to 15 microns. The obtained micro-arc oxidized film mainly composed of aluminum oxide has good wear resistance.

Contents of the invention

The purpose of the present invention is to provide a method for improving the wear resistance of metal materials. The method is based on the bonding performance between the aluminum oxide-based micro-arc oxidation film and the magnetron sputtering aluminum layer and between the magnetron sputtering aluminum layer and the substrate. Excellent, low cost, can significantly improve the wear resistance of metal materials with iron as the main content and metal materials with titanium as the main content.

The present invention is achieved in this way, a method for improving the wear resistance of metal materials, which is characterized in that the method steps are as follows: (1) using magnetron sputtering technology, deposit a layer of 20-30 micron thick on the surface of the metal material Pure aluminum layer; (2) Using micro-arc oxidation technology, this layer of pure aluminum layer is partially micro-arc oxidized, and the thickness of the micro-arc oxidation film is in the range of 10-15 microns; Arc oxidation film has good wear resistance.

The metal material in the present invention includes a metal material mainly containing iron and a metal material mainly containing titanium.

The advantages of the present invention are: the combination between the aluminum oxide-based micro-arc oxidation film and the magnetron sputtered aluminum layer and between the magnetron sputtered aluminum layer and the substrate prepared by the method is excellent and low in cost, and can be applied to Metal materials with iron as the main content and metal materials with titanium as the main content have a wide range of applications and have important application value and promotion value.

Description of drawings

Figure 1 shows the magnetron sputtering aluminum layer and its micro-arc oxidation layer on the surface of TC4 titanium alloy.

Detailed ways

Specific implementation mode 1

Micro-arc oxidation of titanium alloy surface after magnetron sputtering aluminum plating. Firstly, the DM-3 multifunctional magnetron sputtering system developed and produced by Shenyang Beiyu Vacuum Co., Ltd. was used to plate aluminum on the surface of TC4 titanium alloy. 1 mm test piece, before magnetron sputtering aluminum plating, TC4 titanium alloy is ground, chamfered and polished with 400#, 800#, 1200# and 2000# water-based sandpaper, ultrasonically cleaned in acetone solution, and dried before use. After the vacuum chamber is evacuated to 3.2×10 ^-2 Pa during aluminum plating, a small amount of argon gas is introduced and heated to 200 ^o C. The background vacuum pressure is 3.0×10 ^-3 Pa, and the partial pressure of argon gas is 0.6 during operation. Pa, the purity of the aluminum target is 99.999%, the distance from the substrate is 16 cm, the thickness of the aluminum layer deposited on the sample surface is controlled at 25-28 μm, the sputtering power is 500 W, and the sputtering time is 2.5 h.

Then, the samples of TC4 titanium alloy after sputtering and aluminum plating were subjected to micro-arc oxidation treatment under DC pulse mode. The aluminum-plated sample was used as the anode, and the 304 stainless steel solution tank was used as the cathode. The composition of the micro-arc oxidation solution and the main process parameters of the micro-arc oxidation are as follows: NaSiO ₃ 9H ₂ O: 8.0 g/L, (NaPO ₃ ) ₆ : 6.0 g/L, NaOH: 4.0 g/L; current density: 5 A/ dm ² , the temperature of the solution is controlled below 60 ^o C, the treatment time: 60 min, after micro-arc oxidation, rinse with deionized water and then blow dry. The thickness of the micro-arc oxidation film is about 12 μm.

The hardness test shows that the average hardness of the micro-arc oxidation film after magnetron sputtering aluminum plating on titanium alloy is Hv1574, the friction coefficient is 0.3-0.4, the wear amount under the same conditions is 1/3 of that of TC4 titanium alloy, and the wear resistance is significantly improved .

Specific implementation mode 2

Micro-arc oxidation of A3 steel surface after magnetron sputtering aluminum plating. Firstly, the DM-3 multifunctional magnetron sputtering system developed and produced by Shenyang Beiyu Vacuum Co., Ltd. was used to plate aluminum on the surface of A3 steel. Before magnetron sputtering aluminum plating, A3 steel is ground, chamfered and polished with 400#, 800#, 1200# and 2000# water-based sandpaper, ultrasonically cleaned in acetone solution, and dried before use. After the vacuum chamber is evacuated to 3.2×10 ^-2 Pa during aluminum plating, a small amount of argon gas is introduced and heated to 200 ^o C. The background vacuum pressure is 3.0×10 ^-3 Pa, and the partial pressure of argon gas is 0.6 during operation. Pa, the purity of the aluminum target is 99.999%, the distance from the substrate is 16 cm, the thickness of the aluminum layer deposited on the sample surface is controlled at 22-25 microns, the sputtering power is 480W, and the sputtering time is 2 h.

Then, the samples of A3 steel after sputtering and aluminum plating were subjected to micro-arc oxidation treatment under DC pulse mode. The aluminum-plated sample was used as the anode, and the 304 stainless steel solution tank was used as the cathode. The composition of the micro-arc oxidation solution and the main process parameters of the micro-arc oxidation are as follows: NaSiO ₃ 9H ₂ O: 6.0 g/L, (NaPO ₃ ) ₆ : 6.5 g/L, NaOH: 4.0 g/L; current density: 5 A/ dm ² , the temperature of the solution is controlled below 60 ^o C, the treatment time: 60 min, after micro-arc oxidation, rinse with deionized water and then blow dry. The thickness of the micro-arc oxidation film is about 14 microns.

The hardness test shows that the average hardness of the micro-arc oxide film after magnetron sputtering aluminum plating on A3 steel is Hv1650, the friction coefficient is 0.3-0.4, the wear amount under the same conditions is 1/4 of that of A3 steel, and the wear resistance is significantly improved.

Claims (2)

1. improve a method for abrasive resistance of metal material, it is characterized in that method steps is as follows:

(1) utilizing magnetron sputtering technique, is the aluminum layer of 20-30 micron in metal material surface deposition a layer thickness;

(2) utilize differential arc oxidization technique, by this layer of aluminum layer part differential arc oxidation, the thickness range of micro-arc oxidation films is 10-15 micron.

2. according to a kind of method that improves abrasive resistance of metal material described in claim 1, described metallic substance comprises the metallic substance taking iron as main content and the metallic substance taking titanium as main content.