Method for preparing high-temperature-oxidation-preventing titanium alloy coating by compounding laser alloying with micro-arc oxidation
A technology of laser alloying and high temperature oxidation prevention, applied in the direction of metal material coating process, coating, anodization, etc., can solve problems such as inability to meet, and achieve the effect of improving quality, improving high temperature oxidation resistance, and reducing damage
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[0033]Example 1
[0034]1) Pre-treatment of titanium alloy, including grinding, cleaning and drying.
[0035]2) Pre-place the alloy paint on the surface of the material with a control layer thickness of 0.5mm. The alloy components in the alloy paint are: Al: 80wt.%, Si: 15wt.%, Nb: 5wt.%, and wait until it is completely air-dried. Next step.
[0036]3) Set the laser alloying processing technology: laser power 1000W, scanning speed 1000mm / s, scanning distance 0.04mm, laser alloying treatment on the sample;
[0037]4) Polish the sample surface after laser alloying treatment to Ra 0.8μm;
[0038]5) Configuration electrolyte: NaAlO2 15g / L, Na2SiO3 4g / L, ZrO2 2g / L;
[0039]6) Set the pulse power current density of the micro-arc oxidation process to 9A / dm2, Pulse frequency is 500Hz, duty ratio is 30%, electrode spacing is 10mm, electrolyte flow rate is 0.5mm / s, cathode moving speed is 3mm / min, film overlap rate is 40%, and micro-arc oxidation is performed;
[0040]The prepared coating surface was tested, and ...
Example Embodiment
[0042]Example 2
[0043]The alloy composition in the alloy coating is: Al: 50wt.%, Si: 25wt.%, Nb: 25wt.%, and the control layer thickness is 0.5mm.
[0044]Set the laser alloying processing technology: laser power 1000W, scanning speed 1000mm / s, scanning distance 0.04mm.
[0045]Polish the sample surface after laser alloying treatment to Ra 0.8μm
[0046]Configuration electrolyte: NaAlO2 4g / L, Na2SiO3 8g / L, ZrO2 5g / L.
[0047]Set the pulse power current density of the micro-arc oxidation process to 9A / dm2The pulse frequency is 500 Hz, the duty ratio is 30%, the electrode spacing is 10 mm, the electrolyte flow rate is 0.5 mm / s, the cathode movement speed is 3 mm / min, and the film layer is 40%.
[0048]Other process steps are as in Example 1.
[0049]The surface of the prepared coating is detected, and the surface of the coating is good, no defects.
[0050]After 100 hours of high temperature at 900 ° C, the matrix oxidation weight is 27.92 mg / cm.2, Single laser alloying treatment sample oxidation wei...
Example Embodiment
[0051]Example 3
[0052]Alloy components in alloy coatings are divided into: Al: 80 wt.%, Si: 15 wt.%, Nb: 5Wt. %%, the control layer thick at 0.2.
[0053]Set the laser alloying process: laser power is 500W, the scan speed is 200mm / s, the scan spacing is 0.08mm.
[0054]Grinding the sample surface after laser alloying treatment to RA 1.6 μm
[0055]Configuring electrolyte: Naalo2 15g / L, NA2SiO3 4G / L, ZRO2 2g / L.
[0056]Set micro-arc oxidation art pulse power current density 3A / DM2The pulse frequency is 1000 Hz, the duty cycle is 10%, the electrode spacing is 15 mm, the electrolyte flow rate is 1.5 mm / s, the cathode movement speed is 5 mm / min, and the film layer is 20%.
[0057]Other process steps are as in Example 1.
[0058]The surface of the prepared coating is detected, and the surface of the coating is good, no defects.
[0059]After 100 hours of high temperature at 900 ° C, the matrix oxidation weight is 27.92 mg / cm.2, Single laser alloying treatment sample oxidation weight is 14.32mg...
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