Alloy coating material for sports equipment and preparation method thereof

Abstract

The present invention discloses an alloy coating material for sports equipment and a preparation method thereof. Traditional CrAlN coating can improve the wear resistance of magnesium alloy, but the wear resistance is still insufficient. After the present invention continues to add element W to the CrAlN coating, its wear resistance can be further improved. Studies have shown that with the increase of the content of element W, the wear resistance of the composite coating shows a trend of first increasing and then decreasing. In actual use, the content of W should be controlled at 6.3wt%-24.2wt%.

Description

Technical Field

[0001] The invention relates to the field of magnetron sputtering coatings, and in particular to a method for preparing an alloy coating material for sports equipment. Background Art

[0002] As people pay more and more attention to their physical fitness and health, the sporting goods industry has developed rapidly, and higher requirements have been placed on the quality of sports equipment. The continuous use of sports equipment will cause wear on its surface, and the wear is mainly caused by high-intensity and high-frequency use. In view of this, how to improve the wear resistance of sports equipment and extend its service life is a topic worth studying. Summary of the invention

[0003] The object of the present invention is to provide a method for preparing an alloy coating material for sports equipment, wherein the coating material prepared by the method has excellent wear resistance.

[0004] The technical solution of the present invention is as follows:

[0005] A method for preparing an alloy coating material for sports equipment comprises the following steps:

[0006] Substrate pretreatment: AZ91D magnesium alloy was selected as the substrate, and was pickled in a 15-20wt% HCl solution for 30-45min to remove the surface oxide layer, and was alkaline washed in an 8-10wt% Na2CO3 solution for 20-30min to remove the surface oil stains, and then ultrasonically cleaned in ethanol and deionized water, and dried under nitrogen conditions for standby use;

[0007] Magnetron sputtering composite coating: Place the substrate into a magnetron sputtering coating machine, select CrAl alloy target and metal tungsten target as sputtering sources, and sputter in a nitrogen and argon mixed atmosphere to form a composite coating containing Cr, Al, N and W. During the sputtering process, the background vacuum degree is 1*10 -5 Pa, sputtering pressure is 1-3Pa, sputtering temperature is 200-220℃, sputtering time is 30-45min, total gas flow rate is 100-120sccm, flow ratio of nitrogen and argon is 5-7:1, molar ratio of two elements in CrAl alloy target is 1:1, by adjusting the sputtering power of two targets, the mass content of metal tungsten in the whole coating is 6.3-24.2%;

[0008] Stress relief annealing: The magnesium alloy containing the composite coating is placed in a vacuum annealing furnace for stress relief annealing at a temperature of 300-320°C for 2.5-3h, and finally cooled in the furnace.

[0009] Preferably, the total gas flow rate is 100 sccm.

[0010] Preferably, the sputtering time is 45 minutes.

[0011] Preferably, the sputtering temperature is 200°C.

[0012] Preferably, the sputtering pressure is 1Pa.

[0013] Preferably, the mass content of the metal tungsten in the entire coating is 17.5%.

[0014] Furthermore, the present invention also provides an alloy coating material for sports equipment, wherein the coating material is prepared by the above method.

[0015] Traditional CrAlN coating can improve the wear resistance of magnesium alloy, but the wear resistance is still insufficient. After the present invention continues to add the element W to the CrAlN coating, its wear resistance can be further improved. Studies have shown that with the increase of the content of element W, the wear resistance of the composite coating shows a trend of first increasing and then decreasing. In actual use, the content of W should be controlled at 6.3wt%-24.2wt% to meet the use requirements of sports equipment. DETAILED DESCRIPTION

[0016] The technical effects of the present invention are verified below through specific examples, but the embodiments of the present invention are not limited thereto.

[0017] Example 1

[0018] Substrate pretreatment: AZ91D magnesium alloy was selected as the substrate, pickled in 15wt% HCl solution for 30min to remove the surface oxide layer, alkaline washed in 10wt% Na2CO3 solution for 20min to remove the surface oil, ultrasonically cleaned in ethanol and deionized water, and dried under nitrogen for later use;

[0019] Magnetron sputtering composite coating: Place the substrate into a magnetron sputtering coating machine, select CrAl alloy target and metal tungsten target as sputtering sources, and sputter in a nitrogen and argon mixed atmosphere to form a composite coating containing Cr, Al, N and W. During the sputtering process, the background vacuum degree is 1*10 -5 Pa, sputtering pressure is 1Pa, sputtering temperature is 220℃, sputtering time is 45min, total gas flow rate is 100sccm, flow ratio of nitrogen and argon is 5:1, molar ratio of two elements in CrAl alloy target is 1:1, by adjusting the sputtering power of two targets, the mass content of metal tungsten in the whole coating is 6.3%;

[0020] Stress relief annealing: The magnesium alloy containing the composite coating is placed in a vacuum annealing furnace for stress relief annealing at a temperature of 300°C for 2.5 hours, and then cooled in the furnace.

[0021] Example 2

[0022] Substrate pretreatment: AZ91D magnesium alloy was selected as the substrate, pickled in 15wt% HCl solution for 30min to remove the surface oxide layer, alkaline washed in 10wt% Na2CO3 solution for 20min to remove the surface oil, ultrasonically cleaned in ethanol and deionized water, and dried under nitrogen for later use;

[0023] Magnetron sputtering composite coating: Place the substrate into a magnetron sputtering coating machine, select CrAl alloy target and metal tungsten target as sputtering sources, and sputter in a nitrogen and argon mixed atmosphere to form a composite coating containing Cr, Al, N and W. During the sputtering process, the background vacuum degree is 1*10 -5 Pa, sputtering pressure is 1Pa, sputtering temperature is 220℃, sputtering time is 45min, total gas flow rate is 100sccm, flow ratio of nitrogen and argon is 5:1, molar ratio of two elements in CrAl alloy target is 1:1, by adjusting the sputtering power of two targets, the mass content of metal tungsten in the whole coating is 9.5%;

[0024] Stress relief annealing: The magnesium alloy containing the composite coating is placed in a vacuum annealing furnace for stress relief annealing at a temperature of 300°C for 2.5 hours, and then cooled in the furnace.

[0025] Example 3

[0026] Substrate pretreatment: AZ91D magnesium alloy was selected as the substrate, pickled in 15wt% HCl solution for 30min to remove the surface oxide layer, alkaline washed in 10wt% Na2CO3 solution for 20min to remove the surface oil, ultrasonically cleaned in ethanol and deionized water, and dried under nitrogen for later use;

[0027] Magnetron sputtering composite coating: Place the substrate into a magnetron sputtering coating machine, select CrAl alloy target and metal tungsten target as sputtering sources, and sputter in a nitrogen and argon mixed atmosphere to form a composite coating containing Cr, Al, N and W. During the sputtering process, the background vacuum degree is 1*10 -5 Pa, sputtering pressure is 1Pa, sputtering temperature is 220℃, sputtering time is 45min, total gas flow rate is 100sccm, flow ratio of nitrogen and argon is 5:1, molar ratio of two elements in CrAl alloy target is 1:1, by adjusting the sputtering power of two targets, the mass content of metal tungsten in the whole coating is 14.0%;

[0028] Stress relief annealing: The magnesium alloy containing the composite coating is placed in a vacuum annealing furnace for stress relief annealing at a temperature of 300°C for 2.5 hours, and then cooled in the furnace.

[0029] Example 4

[0030] Substrate pretreatment: AZ91D magnesium alloy was selected as the substrate, pickled in 15wt% HCl solution for 30min to remove the surface oxide layer, alkaline washed in 10wt% Na2CO3 solution for 20min to remove the surface oil, ultrasonically cleaned in ethanol and deionized water, and dried under nitrogen for later use;

[0031] Magnetron sputtering composite coating: Place the substrate into a magnetron sputtering coating machine, select CrAl alloy target and metal tungsten target as sputtering sources, and sputter in a nitrogen and argon mixed atmosphere to form a composite coating containing Cr, Al, N and W. During the sputtering process, the background vacuum degree is 1*10 -5 Pa, sputtering pressure is 1Pa, sputtering temperature is 220℃, sputtering time is 45min, total gas flow rate is 100sccm, flow ratio of nitrogen and argon is 5:1, molar ratio of two elements in CrAl alloy target is 1:1, by adjusting the sputtering power of two targets, the mass content of metal tungsten in the whole coating is 17.5%;

[0032] Stress relief annealing: The magnesium alloy containing the composite coating is placed in a vacuum annealing furnace for stress relief annealing at a temperature of 300°C for 2.5 hours, and then cooled in the furnace.

[0033] Example 5

[0034] Substrate pretreatment: AZ91D magnesium alloy was selected as the substrate, pickled in 15wt% HCl solution for 30min to remove the surface oxide layer, alkaline washed in 10wt% Na2CO3 solution for 20min to remove the surface oil, ultrasonically cleaned in ethanol and deionized water, and dried under nitrogen for later use;

[0035] Magnetron sputtering composite coating: Place the substrate into a magnetron sputtering coating machine, select CrAl alloy target and metal tungsten target as sputtering sources, and sputter in a nitrogen and argon mixed atmosphere to form a composite coating containing Cr, Al, N and W. During the sputtering process, the background vacuum degree is 1*10 -5 Pa, sputtering pressure is 1Pa, sputtering temperature is 220℃, sputtering time is 45min, total gas flow rate is 100sccm, flow ratio of nitrogen and argon is 5:1, molar ratio of two elements in CrAl alloy target is 1:1, by adjusting the sputtering power of two targets, the mass content of metal tungsten in the whole coating is 24.2%;

[0036] Stress relief annealing: The magnesium alloy containing the composite coating is placed in a vacuum annealing furnace for stress relief annealing at a temperature of 300°C for 2.5 hours, and then cooled in the furnace.

[0037] Comparative Example 1

[0038] Substrate pretreatment: AZ91D magnesium alloy was selected as the substrate, pickled in 15wt% HCl solution for 30min to remove the surface oxide layer, alkaline washed in 10wt% Na2CO3 solution for 20min to remove the surface oil, ultrasonically cleaned in ethanol and deionized water, and dried under nitrogen for later use;

[0039] Magnetron sputtering composite coating: Place the substrate into a magnetron sputtering coating machine, select a CrAl alloy target as the sputtering source, and sputter in a nitrogen and argon mixed atmosphere to form a composite coating containing Cr, Al, and N. During the sputtering process, the background vacuum is 1*10 -5 Pa, the sputtering pressure is 1Pa, the sputtering temperature is 220℃, the sputtering time is 45min, the total gas flow rate is 100sccm, the flow ratio of nitrogen and argon is 5:1, and the molar ratio of the two elements in the CrAl alloy target is 1:1;

[0040] Stress relief annealing: The magnesium alloy containing the composite coating is placed in a vacuum annealing furnace for stress relief annealing at a temperature of 300°C for 2.5 hours, and then cooled in the furnace.

[0041] Comparative Example 2

[0042] Substrate pretreatment: AZ91D magnesium alloy was selected as the substrate, pickled in 15wt% HCl solution for 30min to remove the surface oxide layer, alkaline washed in 10wt% Na2CO3 solution for 20min to remove the surface oil, ultrasonically cleaned in ethanol and deionized water, and dried under nitrogen for later use;

[0043] Magnetron sputtering composite coating: Place the substrate into a magnetron sputtering coating machine, select CrAl alloy target and metal tungsten target as sputtering sources, and sputter in a nitrogen and argon mixed atmosphere to form a composite coating containing Cr, Al, N and W. During the sputtering process, the background vacuum degree is 1*10 -5 Pa, sputtering pressure is 1Pa, sputtering temperature is 220℃, sputtering time is 45min, total gas flow rate is 100sccm, flow ratio of nitrogen and argon is 5:1, molar ratio of two elements in CrAl alloy target is 1:1, by adjusting the sputtering power of two targets, the mass content of metal tungsten in the whole coating is 35%;

[0044] Stress relief annealing: The magnesium alloy containing the composite coating is placed in a vacuum annealing furnace for stress relief annealing at a temperature of 300°C for 2.5 hours, and then cooled in the furnace.

[0045] Next, we evaluated the wear resistance of the samples in Examples 1-5 and Comparative Examples 1-2, and the specific method was as follows:

[0046] The wear resistance of the samples of Examples 1-5 and Comparative Examples 1-2 was evaluated by using a CETR-3 friction and wear tester (untreated magnesium alloy was selected as a blank group), the load was 5N, the friction pair was a GCr15 steel ball with a diameter of 5mm, the friction frequency was 8Hz, the friction stroke was 3mm, the friction time was 60min, and the mass before and after wear was weighed with an electronic balance to calculate the wear amount. The experimental results of each group are shown in Table 1.

[0047] Table 1 Test data of each sample

[0048] serial number Wear amount / mg Example 1 5.1 Example 2 4.2 Example 3 3.0 Example 4 1.3 Example 5 3.7 Comparative Example 1 8.3 Comparative Example 2 7.1 Blank Group 15.6

[0049] It can be seen from Table 1 that the traditional CrAlN coating can improve the wear resistance of magnesium alloy. After further adding element W to the CrAlN coating, its wear resistance can be further improved. With the increase of the content of element W, the wear resistance of the composite coating shows a trend of first increasing and then decreasing. In actual use, the content of W should be controlled at 6.3wt%-24.2wt% to meet the use requirements of sports equipment.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing an alloy coating material for sports equipment, characterized in that: The following steps are involved: Substrate pretreatment: AZ91D magnesium alloy was selected as the substrate, and was pickled in a 15-20wt% HCl solution for 30-45min to remove the surface oxide layer, and was alkaline washed in an 8-10wt% Na2CO3 solution for 20-30min to remove the surface oil stains, and then ultrasonically cleaned in ethanol and deionized water, and dried under nitrogen conditions for standby use; Magnetron sputtering composite coating: Place the substrate into a magnetron sputtering coating machine, select CrAl alloy target and metal tungsten target as sputtering sources, and sputter in a nitrogen and argon mixed atmosphere to form a composite coating containing Cr, Al, N and W. During the sputtering process, the background vacuum degree is 1*10 -5 Pa, sputtering pressure is 1-3Pa, sputtering temperature is 200-220℃, sputtering time is 30-45min, total gas flow rate is 100-120sccm, flow ratio of nitrogen and argon is 5-7:1, molar ratio of two elements in CrAl alloy target is 1:1, by adjusting the sputtering power of two targets, the mass content of metal tungsten in the whole coating is 6.3-24.2%; Stress relief annealing: The magnesium alloy containing the composite coating is placed in a vacuum annealing furnace for stress relief annealing at a temperature of 300-320°C for 2.5-3h, and finally cooled in the furnace.

2. A preparation method according to claim 1, characterized in that: The total gas flow rate is 100 sccm.

3. A preparation method as claimed in claims 1-2, characterized in that: The sputtering time is 45 min.

4. A preparation method according to claim 1, characterized in that: The sputtering temperature is 200°C.

5. A preparation method according to claim 1, characterized in that: The sputtering pressure is 1Pa.

6. A preparation method according to claim 1, characterized in that: The mass content of metallic tungsten in the entire coating is 17.5%.

7. An alloy coating material for sports equipment, characterized in that: The coating material is prepared by the method according to any one of claims 1 to 6.