An apparatus for grain etching of single crystal high temperature alloy castings

Abstract

The utility model relates to a kind of equipment for monocrystal high-temperature alloy casting grain corrosion, including sequentially arranged chemical etching tank, electrochemical etching tank, ash-removal tank, neutralization tank, ultrasonic cleaning tank and drying tank, first cleaning tank is respectively arranged between chemical etching tank and electrochemical etching tank, between electrochemical etching tank and ash-removal tank;Ash-removal tank and neutralization tank between, between neutralization tank and ultrasonic cleaning tank, ultrasonic cleaning tank and drying tank between second cleaning tank are respectively arranged. Through the equipment with multiple processing tank, monocrystal high-temperature alloy casting is handled, the compatibility to complex workpiece can be improved, avoid manual operation exists corrosion liquid concentration gradient, improve the reproducibility of detection;By setting two etching barrels, two kinds of etching formula can be configured simultaneously, so that the corrosion of different castings can be realized, the waste of time and reagent caused by reagent replacement is avoided, and the cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of quality inspection technology, and in particular to a device for grain corrosion of single-crystal high-temperature alloy castings. Background Technology

[0002] Nickel-based single-crystal superalloys are industrial alloys with excellent high-temperature properties and are the main materials for manufacturing advanced aero-engine and gas turbine blades. The grain boundary structure and defect distribution of nickel-based single-crystal superalloys directly affect the service life of the workpiece. In order to detect the grain boundary structure and defects of nickel-based single-crystal superalloys, it is necessary to etch the workpiece.

[0003] Existing grain etching equipment for single-crystal superalloys exhibits poor etching performance, making grain boundaries difficult to distinguish. Furthermore, after electrochemical etching, corrosion products adhere to the workpiece surface, further obscuring grain boundaries and hindering observation. Moreover, existing grain etching equipment for single-crystal superalloy castings suffers from poor compatibility and cannot meet the etching requirements of various types of single-crystal superalloy castings.

[0004] Based on the above-mentioned technical problems, this application proposes a device for grain corrosion of single-crystal high-temperature alloy castings. Utility Model Content

[0005] The purpose of this invention is to provide a device for grain corrosion of single-crystal high-temperature alloy castings, so as to solve the technical problems mentioned in the background art. This purpose is achieved through the following technical solution: An apparatus for grain etching of single-crystal high-temperature alloy castings includes a chemical etching tank, an electrochemical etching tank, an ash removal tank, a neutralization tank, an ultrasonic cleaning tank, and a drying tank arranged in sequence. A first cleaning tank is provided between the chemical etching tank and the electrochemical etching tank, and between the electrochemical etching tank and the ash removal tank. A second cleaning tank is provided between the ash removal tank and the neutralization tank, between the neutralization tank and the ultrasonic cleaning tank, and between the ultrasonic cleaning tank and the drying tank.

[0006] Furthermore, the chemical etching tank is equipped with a first chemical etching tank, a second chemical etching tank, and a first rinsing tank; the electrochemical etching tank is equipped with a first electrochemical etching tank, a second electrochemical etching tank, and a second rinsing tank.

[0007] Furthermore, the chemical corrosion tank, the electrochemical corrosion tank, the ash removal tank, and the ultrasonic cleaning tank are all equipped with heating mechanisms.

[0008] Furthermore, an air gun and a water gun are installed in the first cleaning tank.

[0009] Furthermore, the second cleaning tank, the ash removal tank, the neutralization tank, and the ultrasonic cleaning tank are all equipped with a bubbling mechanism.

[0010] Furthermore, the chemical corrosion tank, the electrochemical corrosion tank, and the first cleaning tank are all connected to the ventilation mechanism via pipes.

[0011] Furthermore, electrodes are provided inside the electrochemical corrosion tank.

[0012] The technical solutions provided in this application have at least the following technical effects or advantages: 1. Pretreatment of single-crystal high-temperature alloy castings by chemical corrosion can improve the uniformity of surface potential distribution, optimize the surface condition of the workpiece, enhance the corrosion effect of electrochemical corrosion, and improve the identification of grain boundaries. 2. The descaling process can remove corrosion products that adhere to the surface of the workpiece after electrochemical corrosion, making it easier to observe the grain boundaries and improving the accuracy and efficiency of inspection. 3. Processing single-crystal high-temperature alloy castings with equipment equipped with multiple processing tanks can improve compatibility with complex workpieces, avoid the corrosion solution concentration gradient caused by manual operation, and improve the reproducibility of detection. 4. By setting up two corrosion tanks, two corrosion formulas can be configured simultaneously, thereby enabling the corrosion of different castings, avoiding the waste of time and reagents caused by changing reagents, and saving costs. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the device structure according to an embodiment of this application.

[0015] Reference numerals: 1. Chemical etching tank; 11. First chemical etching tank; 12. Second chemical etching tank; 13. First rinsing tank; 2. Electrochemical etching tank; 21. First electrochemical etching tank; 22. Second electrochemical etching tank; 23. Second rinsing tank; 3. Ash removal tank; 4. Neutralization tank; 5. Ultrasonic cleaning tank; 6. Drying tank; 7. First cleaning tank; 8. Second cleaning tank. Detailed Implementation

[0016] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0017] like Figure 1 The device shown is for grain etching of single-crystal high-temperature alloy castings, comprising a chemical etching tank 1, an electrochemical etching tank 2, a dust removal tank 3, a neutralization tank 4, an ultrasonic cleaning tank 5, and a drying tank 6 arranged sequentially. First cleaning tanks 7 are respectively arranged between the chemical etching tank 1 and the electrochemical etching tank 2, and between the electrochemical etching tank 2 and the dust removal tank 3. Second cleaning tanks 8 are respectively arranged between the dust removal tank 3 and the neutralization tank 4, between the neutralization tank 4 and the ultrasonic cleaning tank 5, and between the ultrasonic cleaning tank 5 and the drying tank 6.

[0018] The chemical etching tank 1 includes a first chemical etching tank 11, a second chemical etching tank 12, and a first rinsing tank 13. Each of these tanks is equipped with a heating mechanism to heat the liquids within them. The first and second chemical etching tanks hold different chemical etching solutions, allowing for the selection of a suitable formula based on the workpiece and avoiding waste caused by changing the etching solution.

[0019] The electrochemical etching tank 2 is equipped with a first electrochemical etching tank 21, a second electrochemical etching tank 22, and a second rinsing tank 23. Each of these tanks is equipped with a heating mechanism to heat the liquids within them. The first and second electrochemical etching tanks 21 and 22 each contain different electrochemical etching solutions, allowing for the selection of a suitable formula based on the workpiece and avoiding waste caused by changing the etching solution. Both the first and second electrochemical etching tanks 21 and 22 are equipped with positive and negative electrodes, which are electrically connected to a control power supply via wires.

[0020] The first cleaning tank 7 is equipped with an air gun and a water gun. The water gun is connected to the tap water storage tank via a high-pressure water pump to provide high-pressure tap water for rinsing. The air gun is connected to the air compressor storage tank via an air pipe to provide high-pressure air for drying.

[0021] Chemical corrosion tank 1, electrochemical corrosion tank 2, and first cleaning tank 7 are all connected to the exhaust system via pipes to promptly extract chemical waste gas, avoid affecting the workshop environment, and ensure the safety of operators.

[0022] Both the ash removal tank 3 and the ultrasonic cleaning tank 5 are equipped with heating mechanisms to heat the ash removal solution and the ultrasonic cleaning fluid. Bubbling mechanisms are installed at the bottom of the ash removal tank 3, neutralization tank 4, ultrasonic cleaning tank 5, and the second cleaning tank 8. These mechanisms cause the liquid in the tanks to tumble, thereby improving the treatment effect. The second cleaning tank 8, located downstream of the ultrasonic cleaning tank 5, is connected to a deionized water storage tank.

[0023] The working principle of this utility model is as follows: 1. Immerse the sandblasted single-crystal high-temperature alloy casting in chemical etching tank 1 containing chemical etching solution, and treat it at a temperature of 30-50℃ for 5-20 minutes. The chemical etching solution is a mixed solution of ferric chloride and hydrochloric acid, with the ferric chloride content being 300g / L-500g / L and the hydrochloric acid content being 30g / L-150g / L.

[0024] 2. In the first rinsing tank 13 of the chemical etching tank 1, rinse the single-crystal high-temperature alloy casting after chemical etching with tap water. The rinsing temperature is 30-50℃, and the rinsing time is 0.5-2 minutes. After rinsing, rinse the casting with 20 bar high-pressure tap water for 1 minute in the first cleaning tank 7 downstream of the chemical etching tank 1, and then dry it with a high-pressure air gun.

[0025] 3. Immerse the chemically etched single-crystal high-temperature alloy casting in an electrochemical etching tank 2 containing an electrochemical etching solution, and treat it at a temperature of 20-50℃ for 3-20 minutes. The electrochemical etching parameters are a voltage of 3-5V or a current density of 0.2-1mA / mm2. The electrochemical etching solution is a mixture of sulfuric acid and phosphoric acid, with a ratio of sulfuric acid to phosphoric acid of 1:3-1:5.

[0026] 4. Rinse the electrochemically etched single-crystal high-temperature alloy casting with tap water in the second rinsing tank 23 of the electrochemical etching tank 2. The rinsing temperature is 30-50℃, and the rinsing time is 0.5-2 minutes. After rinsing, rinse the casting with 20 bar high-pressure tap water for 1 minute in the first cleaning tank 7 downstream of the electrochemical etching tank 2, and then dry it with a high-pressure air gun.

[0027] 5. Immerse the electrochemically corroded single-crystal high-temperature alloy casting in a ash removal tank 3 containing a ash removal solution and bubble it. The ash removal solution is a sodium hydroxide solution with a sodium hydroxide content of 44-55 g / L, the ash removal temperature is 60-80℃, and the ash removal time is 15-25 min.

[0028] 6. In the second cleaning tank 8 downstream of the ash removal tank 3, the single crystal high-temperature alloy casting after ash removal treatment is rinsed and bubbled with tap water. The rinsing temperature is 30-50℃ and the rinsing time is 0.5-2min.

[0029] 7. Immerse the de-ashed single-crystal high-temperature alloy casting in neutralization tank 4 containing neutralization solution and bubble it for 1-2 minutes at room temperature; wherein, the neutralization solution is sodium carbonate solution with a sodium carbonate content of 30-60 g / L.

[0030] 8. In the second cleaning tank 8 downstream of the neutralization tank 4, rinse and bubble the neutralized single crystal high-temperature alloy casting with tap water. The rinsing temperature is 30-50℃ and the rinsing time is 0.5-2min.

[0031] 9. Immerse the neutralized single-crystal high-temperature alloy casting in an ultrasonic cleaning tank containing ultrasonic cleaning fluid. Set the ultrasonic frequency to 40-100kHz, the ultrasonic power density to 0.3–0.5 W / cm², and the cleaning temperature to 40-80℃. Simultaneously turn on the bubbling cleaning for 3-10 minutes.

[0032] 10. Immerse the ultrasonically cleaned single-crystal high-temperature alloy casting into the second cleaning tank 8 downstream of the ultrasonic cleaning tank 5, and rinse the ultrasonically cleaned single-crystal high-temperature alloy casting with deionized water at a temperature of 30-50℃ for 0.5-2 minutes.

[0033] 11. Move the rinsed single-crystal high-temperature alloy castings to the drying tank 6 and dry them at a temperature of 80-100℃.

[0034] The technical solutions provided in this application have at least the following technical effects or advantages: 1. Pretreatment of single-crystal high-temperature alloy castings by chemical corrosion can improve the uniformity of surface potential distribution, optimize the surface condition of the workpiece, enhance the corrosion effect of electrochemical corrosion, and improve the identification of grain boundaries. 2. The descaling process can remove corrosion products that adhere to the surface of the workpiece after electrochemical corrosion, making it easier to observe the grain boundaries and improving the accuracy and efficiency of inspection. 3. Processing single-crystal high-temperature alloy castings with equipment equipped with multiple processing tanks can improve compatibility with complex workpieces, avoid the corrosion solution concentration gradient caused by manual operation, and improve the reproducibility of detection. 4. By setting up two corrosion tanks, two corrosion formulas can be configured simultaneously, thereby enabling the corrosion of different castings, avoiding the waste of time and reagents caused by changing reagents, and saving costs.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An apparatus for grain etching of single-crystal superalloy castings, characterized in that, The system includes a chemical etching tank, an electrochemical etching tank, an ash removal tank, a neutralization tank, an ultrasonic cleaning tank, and a drying tank arranged sequentially. A first cleaning tank is provided between the chemical etching tank and the electrochemical etching tank, and between the electrochemical etching tank and the ash removal tank. A second cleaning tank is provided between the ash removal tank and the neutralization tank, between the neutralization tank and the ultrasonic cleaning tank, and between the ultrasonic cleaning tank and the drying tank. The chemical etching tank contains a first chemical etching bucket, a second chemical etching bucket, and a first rinsing bucket, with the first and second chemical etching buckets each containing different chemical etching solutions. The electrochemical etching tank contains a first electrochemical etching bucket, a second electrochemical etching bucket, and a second rinsing bucket, with the first and second electrochemical etching buckets each containing different electrochemical etching solutions.

2. The equipment for grain etching of single-crystal high-temperature alloy castings according to claim 1, characterized in that, The chemical corrosion tank, the electrochemical corrosion tank, the ash removal tank, and the ultrasonic cleaning tank are all equipped with heating mechanisms.

3. The equipment for grain etching of single-crystal high-temperature alloy castings according to claim 1, characterized in that, The first cleaning tank is equipped with an air gun and a water gun.

4. The equipment for grain etching of single-crystal high-temperature alloy castings according to claim 1, characterized in that, The second cleaning tank, the ash removal tank, the neutralization tank, and the ultrasonic cleaning tank are all equipped with a bubbling mechanism.

5. The equipment for grain etching of single-crystal high-temperature alloy castings according to claim 1, characterized in that, The chemical corrosion tank, the electrochemical corrosion tank, and the first cleaning tank are all connected to the ventilation system via pipes.

6. The equipment for grain etching of single-crystal high-temperature alloy castings according to claim 1, characterized in that, Electrodes are installed inside the electrochemical corrosion tank.

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