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Wear-resistant anti-seismic coating and preparation method thereof

A technology of coating and porous ceramics, applied in the direction of coating, surface reaction electrolytic coating, metal material coating technology, etc., can solve the problem of affecting the magnesium alloy fluidity and filling ability of magnesium alloy processing technology, and it is difficult to take care of the substrate Problems such as processing technology and adding magnesium alloy base material defects can avoid the adjustment of base material die-casting process parameters, realize the effect of improving the wear resistance and shock absorption performance of the bottom surface, and the wear resistance and shock absorption performance

Active Publication Date: 2021-02-12
浙江机电职业技术学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach can only achieve a single performance improvement
In addition, some existing technologies, such as patents (CN201510372334.6) (CN201010586192.0), etc., use the method of adding other alloy elements to adjust the composition of magnesium alloys and affect the microstructure of magnesium alloys to improve the wear resistance and reduce the wear resistance of the magnesium alloy matrix. However, this type of method greatly affects the processing technology of magnesium alloys (such as the fluidity and filling ability of magnesium alloys during die-casting) while changing the alloy composition, although it improves the magnesium alloys to a certain extent. Shock absorption and wear resistance, but it will greatly increase the defects of the magnesium alloy substrate and it is difficult to take into account the later processing technology of the substrate

Method used

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  • Wear-resistant anti-seismic coating and preparation method thereof
  • Wear-resistant anti-seismic coating and preparation method thereof
  • Wear-resistant anti-seismic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1: Preparation of Magnesium Alloy Wear-resistant and Anti-seismic Coating

[0052] (1) Three-step pretreatment of cast magnesium alloy substrate (AZ91D):

[0053] Clean the die-casting magnesium alloy substrate to be treated with a mixed solution of acetone and ethanol (volume ratio 1:1) in an ultrasonic environment for 20 minutes to remove impurities and grease on the surface of the substrate, and then use 100g / L of NaOH solution soaked for 15 minutes, and then in 180g / L CrO 3 Soak in the solution for 10 minutes to complete the first step of pretreatment.

[0054] In order to improve the bonding strength between the 3D printing resin and the magnesium alloy substrate in the later stage, the second pretreatment is carried out, that is, a layer of 20-30 micron thick porous layer is prepared by micro-arc oxidation technology on the surface of the magnesium alloy substrate after the first pretreatment. For the ceramic layer, the micropore diameter range of the c...

Embodiment 2

[0066] Example 2: Test of shock-absorbing performance of magnesium alloy wear-resistant and shock-resistant coating

[0067] Adopting damping tester to test the measurement of damping performance adopts dynamic thermomechanical analyzer (DMA2980 type), under the single cantilever mode, the wear-resistant and shock-absorbing coating magnesium alloy prepared in embodiment 1 is tested, and the damping performance is tested by forced vibration. It is characterized by the tangent value of the phase difference of the strain lagging behind the stress, and the evaluation standard refers to GB / T 16406-1996.

[0068] The test conditions are as follows: the strain amplitude is 2*10-4, the frequency is 0.1, 1 and 4 Hz, and the temperature is from room temperature to 150°C.

[0069] The control group was tested with the above-mentioned instruments and the same standard under the same conditions. The samples of the control group were uncoated magnesium alloy plates, magnesium alloy plates c...

Embodiment 3

[0071] Example 3: Wear resistance test of magnesium alloy wear-resistant and shock-resistant coating

[0072] MRH-2 high-speed ring block wear tester was used to test the wear resistance of the wear-resistant and anti-shock coating magnesium alloy prepared in Example 1, and the counter piece was an AISI52100 steel ring.

[0073] The experimental conditions are: temperature room temperature 22 degrees, relative humidity 45%, two lubrication conditions (no lubrication, water lubrication), speed 200r / min, load 50-200N.

[0074] The control group was tested with the above-mentioned instruments and the same standard under the same conditions. The sample blocks of the control group were polyurethane-coated samples, epoxy resin-coated samples and uncoated magnesium alloy substrate samples. All coatings The thickness is 2mm (except for uncoated samples).

[0075] The wear resistance test data under non-lubricated conditions and water-lubricated conditions are as follows: Figure 7-8...

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Abstract

The invention discloses a wear-resistant and shock-resistant coating and a preparation method thereof. The wear-resistant and shock-resistant coating comprises a porous ceramic layer covering the surface of a base material and a composite resin layer printed on the surface of the porous ceramic layer, the composite resin layer comprises a plurality of criss-cross coating units, each coating unit is formed by printing a TPE composite wire containing graphite powder and a TPE composite wire containing tungsten carbide at intervals, and all the coating units form a functional grid. A crossed space grid structure is established on the surface of a die-cast formed base material, and two or more specific materials with different properties are laid in the space structure in a penetrating manner,so that the abrasion resistance and the shock absorption performance of the surface of the die-cast magnesium alloy part are improved, and the base material can be selected from magnesium alloy, aluminum alloy, cast iron, cast copper, stainless steel and the like; and on the premise of not changing components of the base material, the wear resistance and shock absorption performance requirementsof the surface (especially a certain specific surface) of the base material are better met.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a wear-resistant and shock-resistant coating and a preparation method thereof. Background technique [0002] Magnesium alloy is a commonly used metal material, and its die-casting substrate is widely used in new energy vehicles (such as new energy vehicle battery boxes). At present, the wear resistance and shock absorption of the surface (especially the bottom surface) of the die-casting magnesium alloy battery box still need to be further improved in order to better protect the battery and improve the service performance of the supporting substrate. [0003] In the prior art, surface treatment technologies such as laser cladding and shot peening are generally used to improve the surface hardness of the magnesium alloy to improve wear resistance; in addition, the shock absorption performance of the battery box is improved by laying rubber pads. But such a processing method can only achie...

Claims

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Application Information

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IPC IPC(8): C25D11/30C23C26/02C23C28/00
CPCC23C26/02C23C28/00C25D11/026C25D11/30
Inventor 陈光王琪竣马寅涛宋一鸣余杰
Owner 浙江机电职业技术学院