A method for removing surface carbon from a titanium alloy

Abstract

The present application provides a kind of method for removing the carbon on the surface of titanium alloy, comprising the following steps: first, loose agent is ultrasonically dispersed;The loose agent that is uniformly dispersed is coated on the surface of the carbon deposit layer of titanium alloy, and is left for a period of time;Wherein, loose agent is used to weaken the internal molecular interaction of carbon deposit layer While increasing the internal porosity of carbon deposit layer;Real-time monitoring the temperature of the surface of titanium alloy to be cleaned;Pulse laser is used to clean the carbon deposit layer of titanium alloy, to reduce the thickness of carbon deposit layer;Continuous laser is used to continue cleaning the carbon deposit layer of titanium alloy, so that the carbon deposit layer is vaporized under the action of continuous laser. At the same time, in the process of pulse laser and continuous laser cleaning, the temperature of the surface of titanium alloy to be cleaned is kept within the preset temperature range. One technical effect of the present application is that the carbon layer on the surface of titanium alloy can be effectively removed, not only the surface of titanium alloy is well protected, but also the cleaning efficiency of the carbon on the surface of titanium alloy is significantly improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of titanium alloy surface cleaning, and particularly relates to a method for removing surface carbon of titanium alloy. BACKGROUND

[0002] With the development of laser technology, laser cleaning is widely used in more and more industries due to its non-contact, automation, no pollution, low energy consumption and other characteristics. Laser is divided into pulse laser and continuous laser according to the control mode, and the two kinds of lasers are widely used in the laser cleaning industry. Although laser cleaning has many advantages over traditional cleaning, single type of laser cleaning also has certain defects. For example, when continuous laser is used for laser cleaning, the energy generated by the laser will exceed the ablation threshold of the substrate, and at the same time of the gasification of the surface pollutants, the surface of the substrate is also easily damaged, so that the cleaning effect is poor. When pulse laser is used for laser cleaning, the cleaning efficiency is low, and the surface of the substrate is easily impacted, which causes irreversible mechanical damage to the substrate.

[0003] In the prior art, the cleaning method for the surface carbon of titanium alloy is mainly laser cleaning, and the laser cleaning of the surface carbon of titanium alloy has the technical problems of low cleaning efficiency and easy damage to the surface of titanium alloy. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art, and provide a new technical scheme of a method for removing surface carbon of titanium alloy.

[0005] According to one aspect of the present application, a method for removing surface carbon of titanium alloy is provided, comprising the following steps:

[0006] In step S100, first, the loose agent is ultrasonically dispersed, then the uniformly dispersed loose agent is coated on the surface of the carbon deposition layer of the titanium alloy, and is left to stand for 20-30 min. The loose agent is used to weaken the internal molecular interaction force of the carbon deposition layer while increasing the internal porosity of the carbon deposition layer.

[0007] In step S200, the temperature of the surface of the titanium alloy to be cleaned is monitored in real time.

[0008] In step S300, the carbon deposition layer of the titanium alloy is cleaned by pulse laser to reduce the thickness of the carbon deposition layer, and at the same time, the temperature of the surface of the titanium alloy to be cleaned is maintained within a preset temperature range during the pulse laser cleaning.

[0009] In step S400, the carbon deposition layer of the titanium alloy is further cleaned by continuous laser to make the carbon deposition layer vaporize under the action of the continuous laser, and at the same time, the temperature of the surface of the titanium alloy to be cleaned is maintained within a preset temperature range during the continuous laser cleaning.

[0010] Optionally, the bulking agent is prepared from raw materials with the following mass percentages: deionized water 30%-80%; sodium carbonate 5%-30%; sodium silicate 5%-10%; sodium hydroxide 0-10%; sodium nitrate 5%-30%; sodium chloride 5%-30%.

[0011] Optionally, the bulking agent is prepared from raw materials with the following mass percentages: deionized water 40%-70%, sodium carbonate 15%-25%, sodium silicate 5%-7%, sodium hydroxide 5%-7%, sodium chloride 10%-20%.

[0012] Optionally, the bulking agent is prepared from raw materials with the following mass percentages: deionized water 58%, sodium carbonate 20%, sodium silicate 6%, sodium hydroxide 6%, and sodium chloride 10%.

[0013] Optionally, the ultrasonic dispersion time is 2min-5min.

[0014] Optionally, a plurality of air supply openings are arranged at intervals along the cleaning direction to cool the titanium alloy surface to be cleaned through the air supply openings; at the same time, a plurality of air suction openings are arranged at intervals along the cleaning direction, the air suction openings and the air supply openings are located on opposite sides of the titanium alloy respectively, and the air suction openings and the air supply openings are arranged one by one, and waste generated during the cleaning process is collected through the air suction openings.

[0015] Optionally, the pulsed laser generates a first laser scanning line on the surface of the carbon deposition layer of the titanium alloy, and the continuous laser generates a second laser scanning line on the surface of the carbon deposition layer of the titanium alloy.

[0016] The first laser scanning line is located on the scanning path of the second laser scanning line, and a preset gap is formed between the first laser scanning line and the second laser scanning line.

[0017] Optionally, the first laser scanning line reciprocally moves in a direction close to or away from the second laser scanning line.

[0018] Optionally, the preset distance is 1mm-4mm.

[0019] Optionally, the preset temperature range is 150°-200°.

[0020] One technical effect of the present application is that:

[0021] The method for removing surface carbon of titanium alloy in the embodiment of the present application is reasonable in design, which utilizes the chemical-laser combined cleaning method to act on the carbon deposition layer of titanium alloy, first makes the carbon deposition layer loose, then causes high-efficiency and rapid peeling under the action of pulsed laser, and finally causes vaporization under the action of continuous laser, so that the carbon deposition layer on the surface of titanium alloy is completely removed. The method is green, high in efficiency and does not damage the surface of titanium alloy, and greatly improves the cleaning effect.

[0022] Specifically, in the first aspect, the loose agent is ultrasonically dispersed, and the uniformly dispersed loose agent is coated on the surface of the carbon deposition layer of titanium alloy and is left for a period of time. This allows the loose agent to perform softening and loosening treatment on the carbon deposition layer on the surface of titanium alloy, so as to weaken the internal intermolecular interaction force of the carbon deposition layer while increasing the internal porosity of the carbon deposition layer, and then increase the absorption of pulsed laser by the carbon deposition layer, and also make the carbon deposition layer easy to peel off and remove from the surface of titanium alloy.

[0023] In the second aspect, before the carbon deposition layer of titanium alloy is cleaned by continuous laser scanning, the carbon deposition layer is scanned and cleaned by pulsed laser, so that the thickness of the carbon deposition layer of titanium alloy is quickly thinned, thereby effectively reducing the energy density of the continuous laser and avoiding thermal damage to the surface of titanium alloy, so as to be able to completely remove the carbon deposition layer while protecting the titanium alloy.

[0024] In the third aspect, the temperature of the surface of titanium alloy to be cleaned is monitored in real time, so that the temperature of the surface of titanium alloy to be cleaned is always maintained within a preset temperature range during the process of pulsed laser cleaning and the process of continuous laser cleaning, thereby avoiding the energy generated by the laser exceeding the ablation threshold of titanium alloy and damaging the surface of titanium alloy, and thereby protecting the surface of titanium alloy during the process of laser cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A flowchart of a method for removing surface carbon of titanium alloy according to an embodiment of the present application;

[0026] Figure 2 An SEM image of the surface of the carbon deposition layer of titanium alloy;

[0027] Figure 3 An SEM image of the carbon deposition layer of titanium alloy after cleaning by the prior art;

[0028] Figure 4 An SEM image of the carbon deposition layer of titanium alloy after cleaning by the method of the present application. DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0030] The embodiments of the present application will be described in detail below with reference to the drawings, in which the same or similar components have the same or similar designations throughout the drawings and a repeated description is omitted. The embodiments described below are examples in which the present application is applied to the description and are not understood as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative work are within the scope of the present application.

[0031] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and " / " generally means that the front and rear associated objects are in an "or" relationship.

[0032] According to one aspect of the present application, referring to Figure 1 , a method for removing surface carbon of a titanium alloy is provided, which is used for removing surface carbon of a titanium alloy. For example, it can clean and remove the carbon deposition layer of a thin-walled titanium alloy.

[0033] Specifically, the method for removing surface carbon of a titanium alloy comprises the following steps:

[0034] Step S100, first, the loose agent is ultrasonically dispersed; then, the uniformly dispersed loose agent is coated on the surface of the carbon deposition layer of the titanium alloy, and is left to stand for 20-30 min; wherein the loose agent is used to weaken the internal molecular interaction force of the carbon deposition layer while increasing the internal pores of the carbon deposition layer.

[0035] Step S200, the temperature of the surface of the titanium alloy to be cleaned is monitored in real time. By monitoring the temperature of the surface of the titanium alloy to be cleaned in real time, it is ensured that the temperature of the titanium alloy during the cleaning process is always below the safe temperature, avoiding damage to the surface of the titanium alloy by the energy of the laser. For example, a plurality of temperature sensors can be arranged on the side of the titanium alloy away from the carbon deposition layer to monitor the temperature of the surface of the titanium alloy to be cleaned in real time and accurately.

[0036] Step S300, the carbon deposition layer of the titanium alloy is cleaned by using a pulsed laser to reduce the thickness of the carbon deposition layer; at the same time, the temperature of the surface of the titanium alloy to be cleaned is maintained within a preset temperature range during the pulsed laser cleaning.

[0037] Step S400, the carbon deposition layer of the titanium alloy is further cleaned by using a continuous laser to cause the carbon deposition layer to vaporize under the action of the continuous laser; at the same time, the temperature of the surface of the titanium alloy to be cleaned is maintained within a preset temperature range during the continuous laser cleaning.

[0038] In the embodiments of the present application, the method for removing the carbon on the surface of the titanium alloy is reasonable in design. The chemical-laser combined cleaning method is used to act on the carbon deposition layer of the titanium alloy. The carbon deposition layer is first loosened, then high-efficiency and rapid peeling occurs under the action of the pulsed laser, and finally vaporization occurs under the action of the continuous laser, so that the carbon on the surface of the titanium alloy is completely removed. The method is green, efficient and does not damage the surface of the titanium alloy, greatly improving the cleaning effect.

[0039] Specifically, in the first aspect, the loose agent is ultrasonically dispersed, and the uniformly dispersed loose agent is coated on the surface of the carbon deposition layer of the titanium alloy and is left for a period of time. This allows the loose agent to soften and loosen the carbon deposition layer on the surface of the titanium alloy, thereby weakening the internal molecular interaction force of the carbon deposition layer while increasing the internal pores of the carbon deposition layer, and further increasing the absorption of the carbon deposition layer to the pulsed laser, and also making the carbon deposition layer easy to peel off and remove from the surface of the titanium alloy.

[0040] In the second aspect, before the continuous laser is used to scan and clean the carbon deposition layer of the titanium alloy, the pulsed laser is used to scan and clean the carbon deposition layer, so that the thickness of the carbon deposition layer of the titanium alloy is quickly thinned, thereby effectively reducing the energy density of the continuous laser and avoiding thermal damage to the surface of the titanium alloy, so that the carbon deposition layer can be completely removed while the titanium alloy is protected.

[0041] In the third aspect, the temperature of the surface of the titanium alloy to be cleaned is monitored in real time, so that the temperature of the surface of the titanium alloy to be cleaned is always maintained within a preset temperature range during the pulsed laser cleaning process and the continuous laser cleaning process, thereby avoiding the energy generated by the laser exceeding the ablation threshold of the titanium alloy and damaging the surface of the titanium alloy, and thereby protecting the surface of the titanium alloy during the laser cleaning process.

[0042] Optionally, the loose agent is prepared from raw materials with the following mass percentages: deionized water 30%-80%; sodium carbonate 5%-30%; sodium silicate 5%-10%; sodium hydroxide 0-10%; sodium nitrate 5%-30%; and sodium chloride 5%-30%.

[0043] In the above embodiment, the method for removing surface carbon of titanium alloy of the present application uses deionized water as one of the solvents of the porosifier, and is matched with sodium carbonate, sodium silicate, sodium hydroxide and sodium chloride. Through the mutual cooperation of the above-mentioned solvents, a good dissolution effect can be achieved on the unsaturated olefins, paraffins and gum in the carbon deposition layer, so as to decompose the gum in the carbon deposition layer into smaller particles, destroy the internal structure of the carbon deposition layer, increase the absorption of the carbon deposition layer to the pulsed laser, and help the carbon deposition layer to be better peeled off from the surface of the titanium alloy, thereby significantly improving the efficiency of laser cleaning. Further, through the action of continuous laser and keeping the temperature of the titanium alloy surface to be cleaned within the preset temperature range, the carbon deposition layer can be directly gasified and removed, reducing the surface thermal damage of the titanium alloy and better protecting the surface of the titanium alloy.

[0044] Optionally, the porosifier is prepared from raw materials with the following mass percentages: deionized water 40%-70%, sodium carbonate 15%-25%, sodium silicate 5%-7%, sodium hydroxide 5%-7%, and sodium chloride 10%-20%.

[0045] In the above embodiment, the porosifier with the above formula can further weaken the intermolecular interaction force of the carbon deposition layer and further increase the internal pores of the carbon deposition layer, thereby significantly increasing the absorption of the carbon deposition layer to the pulsed laser, effectively reducing the difficulty of peeling off the carbon deposition layer from the surface of the titanium alloy, and facilitating the complete cleaning of the carbon deposition layer on the surface of the titanium alloy by the continuous laser.

[0046] Optionally, the porosifier is prepared from raw materials with the following mass percentages: deionized water 58%, sodium carbonate 20%, sodium silicate 6%, sodium hydroxide 6%, and sodium chloride 10%.

[0047] In the above embodiment, the porosifier with the above formula can maximize the weakening of the intermolecular interaction force of the carbon deposition layer and maximize the increase of the internal pores of the carbon deposition layer, thereby optimizing the absorption effect of the carbon deposition layer to the pulsed laser, significantly reducing the difficulty of peeling off the carbon deposition layer from the surface of the titanium alloy, and further optimizing the cleaning effect of the carbon deposition layer on the surface of the titanium alloy by the continuous laser. See Figure 4 .

[0048] Optionally, the ultrasonic dispersion time is 2-5 min. This helps to achieve uniformity of the porosifier mixture and also helps to ensure the effect of the porosifier, so that the softening and porosifying effect of the carbon deposition layer of the titanium alloy can be effectively achieved when the porosifier is coated on the surface of the carbon deposition layer of the titanium alloy, thereby facilitating the subsequent complete cleaning and removal of the carbon deposition layer of the titanium alloy by the pulsed laser and the continuous laser.

[0049] Preferably, the time for ultrasonic dispersion is 3-4 minutes. This helps to further realize the uniformity of the mixing of the loose agent, thereby better ensuring the loose effect of the loose agent.

[0050] Optionally, a plurality of air supply openings are arranged at intervals along the cleaning direction to cool the titanium alloy surface to be cleaned through the air supply openings; meanwhile, a plurality of air suction openings are arranged at intervals along the cleaning direction, the air suction openings and the air supply openings are respectively located on opposite sides of the titanium alloy, and the air suction openings and the air supply openings are arranged one by one in correspondence, to collect waste surfaces generated in the cleaning process through the air suction openings.

[0051] In the above embodiment, through the cooperation of the air supply openings and the air suction openings, not only can the temperature of the titanium alloy surface to be cleaned in the laser cleaning process be significantly reduced to avoid the damage of the titanium alloy surface caused by the energy generated by the laser exceeding the ablation threshold of the titanium alloy, but also the waste generated in the removal process of the carbon deposition layer of the titanium alloy can be effectively removed to avoid the pollution of the surface of the titanium alloy, thereby effectively ensuring the cleanliness of the surface of the titanium alloy and better ensuring the removal effect of the carbon deposition on the surface of the titanium alloy.

[0052] In a specific embodiment, an air compressor is used to realize the cooling function of the titanium alloy surface to be cleaned through the air supply openings, and a dust collection device is used to collect the waste surfaces generated in the cleaning process through the air suction openings, for example, the titanium alloy is placed on the laser cleaning platform, and the air supply openings and the air suction openings are arranged on opposite sides of the laser cleaning platform, the dust collection device collects the waste generated by the laser cleaning into a storage box, and then the waste is manually collected and treated, and the treatment process is relatively efficient. Therefore, through the air supply openings and the air suction openings, the waste generated in the cleaning process can be collected, and the temperature of the titanium alloy surface to be cleaned can be reduced, thereby better protecting the titanium alloy.

[0053] Optionally, the pulsed laser generates a first laser scanning line on the surface of the carbon deposition layer of the titanium alloy, and the continuous laser generates a second laser scanning line on the surface of the carbon deposition layer of the titanium alloy.

[0054] The first laser scanning line is located on the scanning path of the second laser scanning line, and a preset gap is formed between the first laser scanning line and the second laser scanning line.

[0055] In the above embodiment, by adopting the first laser scanning line to perform pulsed laser cleaning on the carbon deposition layer of the titanium alloy before the second laser scanning line performs continuous laser cleaning on the carbon deposition layer of the titanium alloy, the first laser scanning line and the second laser scanning line are sequentially arranged to clean the carbon deposition layer of the titanium alloy, and a preset gap is formed between the first laser scanning line and the second laser scanning line to shorten the cleaning time interval of the first laser scanning line and the second laser scanning line, so that the second laser scanning line can utilize the energy generated by the first laser scanning line in the cleaning process, which not only helps to improve the cleaning efficiency of the second laser scanning line, but also helps to save energy.

[0056] Optionally, the first laser scanning line reciprocates in a direction close to or away from the second laser scanning line. This helps the first laser scanning line to scan and clean the carbon deposition layer of the titanium alloy, which can improve the scanning and cleaning effect of the carbon deposition layer of the titanium alloy, thereby effectively reducing the thickness of the carbon deposition layer of the titanium alloy and significantly reducing the peeling difficulty of the carbon deposition layer from the surface of the titanium alloy, which helps the second laser scanning line to better remove the carbon deposition layer of the titanium alloy when cleaning, thereby improving the removal efficiency and effect of the carbon deposition layer of the titanium alloy.

[0057] Optionally, the preset distance is 1mm-4mm. This makes the gap between the first laser scanning line and the second laser scanning line smaller, thereby shortening the cleaning time interval of the first laser scanning line and the second laser scanning line, which helps the second laser scanning line to fully utilize the energy generated by the first laser scanning line in the cleaning process, thereby not only helping to improve the cleaning efficiency of the second laser scanning line, but also helping to save energy.

[0058] Further preferably, the preset distance is 2mm-3mm. This makes the first laser scanning line and the second laser scanning line form a better cooperation effect, which reduces the thickness of the carbon deposition layer of the titanium alloy through the first laser scanning line, and then effectively removes the carbon deposition layer of the titanium alloy through the second laser scanning line, thereby making the removal effect of the carbon deposition layer on the surface of the titanium alloy better, and also effectively protecting the surface of the titanium alloy.

[0059] Optionally, the preset temperature range is 150°-200°. This makes the energy generated by the laser always below the ablation threshold of the titanium alloy, thereby effectively avoiding damage to the surface of the titanium alloy by the laser, and thereby better protecting the surface of the titanium alloy in the process of removing the carbon deposition layer on the surface of the titanium alloy, thereby ensuring the effectiveness and safety of the method for removing the carbon deposition layer on the surface of the titanium alloy.

[0060] In the embodiments of the present application, Figure 2 is an SEM image of the surface of the carbon deposition layer of the titanium alloy; Figure 3 is an SEM image of the carbon deposition layer of the titanium alloy after cleaning by the prior art;Figure 4 SEM image of the carbon deposition layer of the titanium alloy after cleaning by the method of the present application. Comparison Figures 2 to 4 The method for removing surface carbon deposition of the titanium alloy can effectively remove the carbon deposition layer on the surface of the titanium alloy, and the removal effect is better.

[0061] In summary, the method for removing surface carbon deposition of the titanium alloy can effectively remove the surface carbon deposition layer of the titanium alloy, not only better protecting the surface of the titanium alloy, but also significantly improving the cleaning efficiency of the surface carbon deposition of the titanium alloy.

[0062] It can be understood that the above embodiments are only exemplary embodiments adopted for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also considered as the protection scope of the present application.

Claims

1. A method for removing carbon deposits from the surface of titanium alloys, characterized in that, Includes the following steps: Step S100: First, the loosening agent is ultrasonically dispersed; then, the uniformly dispersed loosening agent is coated onto the surface of the carbon deposit layer of the titanium alloy and left to stand for 20 min to 30 min; wherein, the loosening agent is used to weaken the intermolecular interaction forces within the carbon deposit layer while increasing the internal porosity of the carbon deposit layer. The loosening agent is prepared from the following raw materials in the indicated mass percentages: 30%-80% deionized water; 5%-30% sodium carbonate; 5%-10% sodium silicate; 0-10% sodium hydroxide; 5%-30% sodium nitrate; and 5%-30% sodium chloride. Step S200: Monitor the temperature of the titanium alloy surface to be cleaned in real time; In step S300, a pulsed laser is used to clean the carbon deposit layer of the titanium alloy to reduce the thickness of the carbon deposit layer; at the same time, during the pulsed laser cleaning process, the temperature of the titanium alloy surface to be cleaned is kept within a preset temperature range. In step S400, a continuous laser is used to continue cleaning the carbon deposit layer of the titanium alloy so that the carbon deposit layer vaporizes under the action of the continuous laser; at the same time, during the continuous laser cleaning process, the temperature of the titanium alloy surface to be cleaned is kept within a preset temperature range.

2. The method for removing surface carbon from titanium alloys according to claim 1, characterized in that, The loosening agent is prepared from the following raw materials in the indicated mass percentages: 40%-70% deionized water, 15%-25% sodium carbonate, 5%-7% sodium silicate, 5%-7% sodium hydroxide, and 10%-20% sodium chloride.

3. The method for removing surface carbon from titanium alloys according to claim 2, characterized in that, The loosening agent is prepared from the following raw materials in the indicated mass percentages: 58% deionized water, 20% sodium carbonate, 6% sodium silicate, 6% sodium hydroxide, and 10% sodium chloride.

4. The method for removing carbon from the surface of titanium alloys according to claim 1, characterized in that, The ultrasonic dispersion time is 2 min to 5 min.

5. The method for removing carbon from the surface of titanium alloys according to claim 1, characterized in that, Multiple air outlets are spaced apart along the cleaning direction to cool the titanium alloy surface to be cleaned; at the same time, multiple air suction ports are spaced apart along the cleaning direction. The air suction ports and the air outlets are located on opposite sides of the titanium alloy, and the air suction ports and the air outlets are arranged in a one-to-one correspondence to collect the waste generated on the surface during the cleaning process.

6. The method for removing carbon from the surface of titanium alloys according to claim 1, characterized in that, A pulsed laser generates a first laser scanning line on the surface of the carbon deposit layer of the titanium alloy, and a continuous laser generates a second laser scanning line on the surface of the carbon deposit layer of the titanium alloy. The first laser scanning line is located on the scanning path of the second laser scanning line, and a preset gap is formed between the first laser scanning line and the second laser scanning line.

7. The method for removing surface carbon from titanium alloys according to claim 6, characterized in that, The first laser scanning line moves back and forth along the direction that is close to or away from the second laser scanning line.

8. The method for removing surface carbon from titanium alloys according to claim 6, characterized in that, The preset gap is 1mm-4mm.

9. The method for removing carbon from the surface of titanium alloys according to claim 1, characterized in that, The preset temperature range is 150°-200°.

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