Turbine blade high-temperature alloy grinding fluid and preparation method thereof
By preparing a high-temperature alloy grinding fluid with a specific composition for turbine blades, the problems of thermal damage and precision during the grinding process of high-temperature alloys were solved, achieving efficient cooling and improved surface precision, and extending the service life of the grinding wheel.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-03-10
AI Technical Summary
Turbine blade high-temperature alloys are prone to thermal damage, surface cracks and deformation during grinding, and existing grinding fluids are difficult to effectively cool and suppress remelted layers and microcracks, which cannot meet the requirements of high-precision machining.
Grinding fluids, which consist of rust inhibitors, pH adjusters, lubricants, wetting agents, settling agents, and defoamers in specific proportions, including phosphate esters and high molecular weight polyether lubricants, are mixed by heating to form a transparent liquid for grinding high-temperature alloys.
It improves the cooling effect of grinding, reduces friction, reduces wear, improves surface accuracy, extends the service life of grinding wheels, and meets the high-precision machining requirements of turbine blades.
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Figure CN121628709A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a high-temperature alloy grinding fluid for turbine blades and its preparation method, belonging to the field of grinding fluids. Background Technology
[0002] As a core component of marine gas turbines and aero engines, turbine blades face extremely stringent requirements in terms of material properties, machining precision, and surface quality during manufacturing. Grinding fluid for turbine blades is a crucial auxiliary material, and its performance and technological advancements directly impact blade machining efficiency and final performance. Turbine blades typically utilize high-temperature alloys (such as single-crystal alloys and composite casting alloys). These materials possess high hardness, high toughness, and high-temperature resistance, making them prone to thermal damage, surface cracks, and deformation during grinding. The following issues must be addressed simultaneously during grinding: local temperatures can reach over 1000℃ during grinding of high-temperature alloys, necessitating rapid cooling and reduction of thermal stress through grinding fluid; the grinding fluid must suppress remelted layers and microcracks, ensuring a blade surface roughness ≤0.2μm; and ultra-high-speed grinding (wheel speed ≥150m / s) requires the grinding fluid to possess high lubricity and excellent chip removal and settling properties. Summary of the Invention
[0003] The purpose of this invention is to provide a grinding fluid for high-temperature alloy turbine blades and its preparation method, specifically for the grinding processing of high-temperature alloy materials for turbine blades.
[0004] The technical solution adopted by this invention to solve its technical problem is: In a first aspect, this application provides a high-temperature alloy grinding fluid for turbine blades, comprising, by mass, 4%~10% rust inhibitor, 5%~10% pH adjuster, 20%~40% lubricant, 1%~5% friction reducer, 2%~5% wetting agent, 1%~5% settling agent, 0.1%~0.5% defoamer, with the balance being water; the lubricant is selected from at least one of phosphate ester lubricants and high molecular weight polyether lubricants; the wetting agent is selected from at least one of diethylene glycol butyl ether, propylene glycol butyl ether, triethylene glycol butyl ether, and isohexyl glycol; and the settling agent is selected from at least one of polyquaternary ammonium salt, polyacrylamide, and polyaluminum chloride.
[0005] The high-temperature alloy grinding fluid for turbine blades provided in this application effectively improves the surface precision of ship turbine blades after grinding by selecting lubricants, wetting agents, and settling agents suitable for high-temperature alloy processing.
[0006] Further, by weight, it comprises 5%~8% of the rust inhibitor, 5%~10% of the pH adjuster, 20%~30% of the lubricant, 1%~3% of the friction reducer, 3%~5% of the wetting agent, 1%~3% of the settling agent, 0.1%~0.3% of the defoamer, and the balance being water.
[0007] Furthermore, the rust inhibitor includes borate ester rust inhibitors and organic acid rust inhibitors, wherein the mass ratio of the borate ester rust inhibitor to the organic acid rust inhibitor is 1:2.
[0008] Furthermore, the borate ester rust inhibitor is selected from at least one of monoethanolamine borate ester and triethanolamine borate ester; the organic acid rust inhibitor is selected from at least one of undecanoic acid, dodecanoic acid, sebacic acid, and ternary polymeric acid (2,4,6-tris(aminohexanoic acid)-1,3,5-triazine).
[0009] Further, the pH adjuster includes a first pH adjuster and a second pH adjuster; the first pH adjuster is selected from at least one of triethanolamine and diethanolamine; the second pH adjuster is selected from at least one of diethylene glycolamine, triethylenetetramine, tetraethylenepentamine, and 2-amino-2-methyl-1-propanol.
[0010] Furthermore, the mass ratio of the first pH adjuster to the second pH adjuster is 4:1.
[0011] Further, the phosphate ester lubricant is selected from at least one of isotridecyl phosphate and fatty alcohol polyoxyethylene ether phosphate; the polymeric polyether lubricant is selected from at least one of polyethylene glycol with a molecular weight of 1000-2000 and a random copolymer of methyl ethylene oxide with ethylenediamine and ethylene oxide with a molecular weight of 3000-4000; the lubricant is a mixture of the phosphate ester lubricant and the polymeric polyether lubricant, and the mass ratio of the phosphate ester lubricant to the polymeric polyether lubricant is 1:20.
[0012] Furthermore, the friction reducer is selected from at least one of polyetheramine D400, polyetheramine D2000, and polyetheramine T403.
[0013] Furthermore, the high-temperature alloy grinding fluid for turbine blades further includes 0.1% to 0.5% (preferably 0.1% to 0.3%) of defoamer by mass, wherein the defoamer is selected from at least one of polyether-type defoamers, silicone-type defoamers, and acetylenic diol-type defoamers.
[0014] Secondly, this application provides a method for preparing the high-temperature alloy grinding fluid for turbine blades as described in the first aspect, the steps of which include: adding the rust inhibitor, the pH adjuster and water, heating to 40℃~50℃, stirring and mixing, and after natural cooling, adding the lubricant, the friction reducer, the wetting agent and the settling agent, mixing until transparent, to obtain the high-temperature alloy grinding fluid for turbine blades.
[0015] The beneficial effects of the present invention are: the high-temperature alloy grinding fluid for turbine blades of the present invention can reduce friction and wear during grinding, has rapid dispersion and wetting properties, and is conducive to rapid cooling during grinding. The high-temperature alloy grinding fluid for turbine blades can achieve a smaller surface roughness for turbine blades, which is beneficial to enhance the protection of grinding wheels and extend their service life. Attached Figure Description
[0016] Figure 1 This is a comparison chart showing the friction coefficient test results of the grinding fluids obtained in the comparative example and each embodiment in the reciprocating friction test.
[0017] Figure 2 This is a super-depth-of-field image of the YG8 cemented carbide lower plate after applying the grinding fluid obtained in Comparative Example 1 during a reciprocating friction test.
[0018] Figure 3 This is a super-depth-of-field image of a silicon carbide sphere after applying the grinding fluid obtained in Comparative Example 1 during a reciprocating friction test.
[0019] Figure 4 This is a super depth-of-field image of the YG8 cemented carbide lower plate after applying the grinding fluid obtained in Example 1 during a reciprocating friction test.
[0020] Figure 5 This is a super-depth-of-field image of a silicon carbide sphere after applying the grinding fluid obtained in Example 1 during a reciprocating friction test.
[0021] Figure 6 This is a super depth-of-field image of the YG8 cemented carbide lower plate after applying the grinding fluid obtained in Example 2 during a reciprocating friction test.
[0022] Figure 7 This is a super-depth-of-field image of a silicon carbide sphere after applying the grinding fluid obtained in Example 2 during a reciprocating friction test.
[0023] Figure 8 This is a super depth-of-field image of the YG8 cemented carbide lower plate after applying the grinding fluid obtained in Example 3 during a reciprocating friction test.
[0024] Figure 9 This is a super-depth-of-field image of a silicon carbide sphere after applying the grinding fluid obtained in Example 3 during a reciprocating friction test.
[0025] Figure 10 This is a super depth-of-field image of the YG8 cemented carbide lower plate after applying the grinding fluid obtained in Example 4 during a reciprocating friction test.
[0026] Figure 11 This is a super-depth-of-field image of a silicon carbide sphere after applying the grinding fluid obtained in Example 4 during a reciprocating friction test. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure are described clearly and completely below. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this invention.
[0028] It should be understood that, without conflict, any and all embodiments of the present invention can be combined with technical features of any other embodiment or multiple other embodiments to obtain other embodiments. The present invention includes such combinations to obtain other embodiments.
[0029] In this specification, groups and their substituents may be selected by those skilled in the art to provide stable structural moieties and compounds. When a substituent is described by a conventional chemical formula written from left to right, the substituent also includes chemically equivalent substituents obtained when the structural formula is written from right to left.
[0030] Unless otherwise specified, all technical and scientific terms used herein have the standard meaning in the field to which the claimed subject matter pertains. Where multiple definitions exist for a term, the definition herein shall prevail.
[0031] This application provides a high-temperature alloy grinding fluid for turbine blades, comprising, by weight, 4%~10% rust inhibitor, 5%~10% pH adjuster, 20%~40% lubricant, 1%~5% friction reducer, 2%~5% wetting agent, 1%~5% settling agent, and the balance being water; the lubricant includes phosphate ester lubricants and high molecular weight polyether lubricants; the wetting agent is selected from at least one of diethylene glycol butyl ether, propylene glycol butyl ether, triethylene glycol butyl ether, and isohexyl glycol; the settling agent is selected from at least one of polyquaternary ammonium salt, polyacrylamide, and polyaluminum chloride.
[0032] Accordingly, the preparation steps are as follows: 1) In a clean, constant-temperature stirred reactor, add deionized water, rust inhibitor, and pH adjuster in sequence.
[0033] 2) Heat to 40℃~50℃ and stir well. Take a sample for observation. If it is a clear and transparent liquid, stop stirring and let it cool naturally to room temperature.
[0034] 3) After cooling, add lubricant, friction reducer, wetting agent and settling agent in sequence, stirring evenly while adding. After filtration, take a sample for observation. If it is a transparent and clear liquid, the grinding fluid product is obtained.
[0035] The grinding fluid formulation for Comparative Example 1 is shown in Table 1 below.
[0036]
[0037] Table 1 The formula of the grinding fluid in Example 1 is shown in Table 2 below.
[0038]
[0039] Table 2 The formulation of the grinding fluid in Example 2 is shown in Table 3 below.
[0040]
[0041] Table 3 The formula for the grinding fluid in Example 3 is shown in Table 4 below.
[0042]
[0043] Table 4 The formulation of the grinding fluid in Example 4 is shown in Table 5 below.
[0044]
[0045] Table 5 The properties of the grinding fluids obtained in Comparative Example 1 and each embodiment were observed. The pH value of the 5% diluted grinding fluids obtained in Comparative Example 1 and each embodiment was tested. The rust prevention of the 5% diluted grinding fluids obtained in Comparative Example 1 and each embodiment was tested. The PB value (maximum non-seize load) of the 5% diluted grinding fluids obtained in Comparative Example 1 and each embodiment was tested. The surface tension of the grinding fluids obtained in Comparative Example 1 and each embodiment was tested. The results are shown in Table 6 below.
[0046]
[0047] Table 6 From the test results above, we can conclude that: Comparative Example 1, which uses a single multi-component polymeric carboxylic acid as a rust inhibitor, triethanolamine as a single alkali reserve for pH value, and polyethylene glycol 400 as a lubricant, shows that the overall rust-preventive and lubricating properties are weak and the surface tension is high.
[0048] In Examples 1, 2, 3, and 4, a ternary polymeric carboxylic acid (2,4,6-tris(aminohexanoic acid)-1,3,5-triazine) and dodecanoic acid were used as rust inhibitors. The pH adjuster was a mixture of triethanolamine and diethylene glycolamine (or tetraethylenepentamine). The combination of common alcohol amines and special amines provided a higher alkali reserve. At the same time, the random copolymer of methyl ethylene oxide, ethylenediamine, and ethylene oxide, phosphate ester, and polyether amine were compounded together as a lubricating and friction-reducing component, providing a better PB value and stronger oil film protection ability.
[0049] To further verify the lubrication characteristics of each embodiment, reciprocating friction tests were conducted using an SRV-5 friction testing machine to test the friction coefficient, roughness, and wear of the comparative and individual embodiments. This experiment can realistically simulate the grinding process of high-temperature alloys.
[0050] Test materials: silicon carbide upper sphere; high-temperature alloy YG8 (tungsten-cobalt alloy) lower plate; Force applied: 100N; Vibration frequency: 20Hz; Friction length: 2mm; Test duration: 300 seconds.
[0051] The results for the friction coefficient are shown below. Figure 1 , Figure 1 The vertical axis represents the coefficient of friction (COF), and the horizontal axis represents the test time; roughness results are shown in Table 7; wear conditions are shown in... Figures 2 to 11 Super depth-of-field images.
[0052]
[0053] Table 7 Based on the above friction curve data and the observation of the friction between the upper sphere and the lower plate under super depth of field, Comparative Example 1 is compared with each embodiment. It can be seen that Comparative Example 1 has a high friction curve trend, a large friction coefficient, significant wear on the silicon carbide upper sphere, and blackened wear marks and high roughness on the high-temperature alloy YG8 lower plate. All four embodiments are better than Comparative Example 1 in terms of friction curve, wear mark size, and roughness.
[0054] Comparing the various embodiments, Example 4, which uses tetraethylenepentamine, a random copolymer of methyl ethylene oxide and ethylenediamine and ethylene oxide, and fatty alcohol polyoxyethylene ether phosphate, exhibits the lowest coefficient of friction, shallow wear scars, and low roughness on the silicon carbide upper ball and the high-temperature alloy YG8 lower disc. This indicates that under this lubrication composition ratio, the oil film formed during carbide grinding is stable, effectively reducing the coefficient of friction and improving grinding accuracy. It is particularly important to emphasize that the addition of tetraethylenepentamine, a special amine, in Example 4 not only provides a high alkali reserve capacity for the grinding fluid but also, as it is often used as a major component of adhesives, helps maintain the self-sharpening properties of the grinding wheel in the carbide grinding fluid for a long time, effectively preserving the integrity of the grinding wheel's grain size and extending its service life.
[0055] The above demonstrates that this application can meet the requirements for grinding turbine blades.
[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0057] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.
Claims
1. A turbine blade high temperature alloy grinding fluid, characterized by, The rust inhibitor is 4-10% by mass, the pH value regulator is 5-10% by mass, the lubricant is 20-40% by mass, the friction reducer is 1-5% by mass, the wetting agent is 2-5% by mass, the settling agent is 1-5% by mass, and the balance is water; the lubricant is at least one selected from phosphate ester lubricants and high molecular polyether lubricants; the wetting agent is at least one selected from diethylene glycol butyl ether, propylene glycol butyl ether, triethylene glycol butyl ether and isohexanediol; and the settling agent is at least one selected from polyquaternary ammonium salt, polyacrylamide and polyaluminum chloride.
2. The turbine blade high-temperature alloy grinding fluid of claim 1, wherein, The rust inhibitor is 5-8% by mass, the pH value regulator is 5-10% by mass, the lubricant is 20-30% by mass, the friction reducer is 1-3% by mass, the wetting agent is 3-5% by mass, and the settling agent is 1-3% by mass, and the balance is water.
3. The turbine blade superalloy grinding fluid of claim 1 or 2, wherein, The rust inhibitor comprises borate rust inhibitors and organic acid rust inhibitors, and the mass ratio of the borate rust inhibitors to the organic acid rust inhibitors is 1:
2.
4. The turbine blade superalloy grinding fluid of claim 3, wherein, The borate rust inhibitors are at least one selected from monoethanolamine borate and triethanolamine borate, and the organic acid rust inhibitors are at least one selected from undecanoic acid, dodecanoic acid, sebacic acid and ternary polymerized acid.
5. The turbine blade superalloy grinding fluid of claim 1 or 2, wherein, The pH value regulator comprises a first pH value regulator and a second pH value regulator; the first pH value regulator is at least one selected from triethanolamine and diethanolamine; and the second pH value regulator is at least one selected from diglycolamine, triethylenetetramine, tetraethylenepentamine and 2-amino-2-methyl-1-propanol.
6. The turbine blade high-temperature alloy grinding fluid of claim 5, wherein, The mass ratio of the first pH value regulator to the second pH value regulator is 4:
1.
7. The turbine blade superalloy grinding fluid of claim 1 or 2, wherein, The phosphate ester lubricant is at least one selected from isotridecanol phosphate ester and ester aliphatic alcohol polyoxyethylene ether phosphate; the high molecular polyether lubricant is at least one selected from polyethylene glycol with a molecular weight of 1000-2000 and a random copolymer of methyl oxirane with an ethylene diamine and oxirane with a molecular weight of 3000-4000; the lubricant is a mixture of the phosphate ester lubricant and the high molecular polyether lubricant, and the mass ratio of the phosphate ester lubricant to the high molecular polyether lubricant is 1:
20.
8. The turbine blade high-temperature alloy grinding fluid of claim 1 or 2, wherein, The friction reducer is at least one selected from polyetheramine D400, polyetheramine D2000 and polyetheramine T403.
9. The turbine blade superalloy grinding fluid of claim 1 or 2, wherein, The antifoaming agent is at least one selected from polyether antifoaming agents, silicone antifoaming agents and acetylenic diol antifoaming agents.
10. The method of making a turbine blade superalloy grinding fluid according to any one of claims 1 to 9, wherein the step of The method comprises the following steps: The rust inhibitor, the pH value regulator and water are added, heated to 40-50 DEG C, stirred and mixed, and then the lubricant, the friction reducer, the wetting agent and the settling agent are added, mixed to be transparent, and the turbine blade high-temperature alloy grinding fluid is obtained.