A semi-synthetic cutting fluid for titanium alloys, its preparation method and application

Abstract

This invention belongs to the field of cutting technology and discloses a semi-synthetic cutting fluid for titanium alloys, its preparation method, and its application. The semi-synthetic cutting fluid for titanium alloys of this invention comprises the following components in parts by weight: 20-25 parts base oil, 5-15 parts alkali reserve agent, 5-10 parts rust inhibitor, 2-5 parts titanium alloy corrosion inhibitor, 20-30 parts lubricant, 3-6 parts dispersant, 3-5 parts coupling agent, 3-6 parts surfactant, 2-4 parts bactericide, and 0.05-0.2 parts defoamer. The semi-synthetic cutting fluid for titanium alloys of this invention has excellent corrosion inhibition, lubrication, defoaming, cooling, and stability properties for titanium alloys. It can be applied to the cutting process of difficult-to-machine metal materials such as titanium alloys. It not only meets the machining requirements of materials and reduces the cutting force and cutting temperature during the cutting process, but also protects the tool and workpiece from wear and burns. Furthermore, it does not contain formaldehyde-releasing materials and complies with RoHS 2.0 environmental protection requirements.

Description

Technical Field

[0001] This invention relates to the field of cutting technology, specifically to a semi-synthetic cutting fluid for titanium alloys, its preparation method, and its application. Background Technology

[0002] Titanium alloys possess advantages such as high specific strength, strong corrosion resistance, high temperature resistance, and good biocompatibility, making them applicable in aerospace, biomedicine, and electronics industries. Over the next 20 years, titanium alloys will gradually replace aluminum alloys as the primary material in aircraft manufacturing; for example, important components such as landing gear and turbine blades utilize titanium alloys. Titanium alloys account for 40% of the structural weight of the F-22 fighter jet, and each C919 large passenger aircraft requires approximately 200,000 titanium alloy fasteners. The proportion of titanium alloys used has become a key indicator of an aircraft's sophistication. Simultaneously, titanium alloys are among the most commonly used materials in the medical field, used to manufacture bone implants, artificial joints, and dental restorations. Their biocompatibility and excellent mechanical properties make them ideal materials for medical devices. In the electronics field, titanium alloys are used in electronic casings, connectors, and aerospace electronic equipment, primarily utilizing their electrical conductivity and lightweight properties. However, high-speed machining of titanium alloys presents challenges such as excessively high cutting temperatures, severe tool sticking, intense tool wear, and poor surface finish. Furthermore, titanium alloys have poor thermal conductivity and high chemical reactivity, leading to difficulties in machining and lubrication, thus limiting their processing efficiency and quality.

[0003] The existing titanium alloy semi-synthetic cutting fluids have the following shortcomings: (1) Insufficient cooling performance, which causes the workpiece and tool to overheat during the cutting process; (2) Poor lubrication effect, which cannot reduce tool wear while ensuring the quality of the cutting surface; (3) Strong corrosiveness, which causes corrosion to the workpiece and machine tool; (4) Contains harmful chemical substances, and the cutting waste fluid produced has a negative impact on the environment.

[0004] Therefore, there is an urgent need to further develop a new type of titanium alloy semi-synthetic cutting fluid with excellent cooling, lubrication, stability and corrosion inhibition properties, and whose waste liquid will not pollute the aquatic environment. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a titanium alloy semi-synthetic cutting fluid, its preparation method, and its application.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, the present invention provides a semi-synthetic cutting fluid for titanium alloys, comprising the following components in parts by weight: 20-25 parts base oil, 5-15 parts alkali reserve agent, 5-10 parts rust inhibitor, 2-5 parts titanium alloy corrosion inhibitor, 20-30 parts lubricant, 3-6 parts dispersant, 3-5 parts coupling agent, 3-6 parts surfactant, 2-4 parts bactericide, and 0.05-0.2 parts defoamer; wherein the lubricant comprises a synthetic acid ester and a vulcanized polymeric ester; and the mass ratio of the synthetic acid ester to the vulcanized polymeric ester is (6-11):1.

[0008] This invention relates to a semi-synthetic cutting fluid for titanium alloys, formulated from base oil, alkali reserve agent, rust inhibitor, titanium alloy corrosion inhibitor, lubricant, dispersant, coupling agent, surfactant, bactericide, and defoamer. This fluid exhibits excellent corrosion inhibition, lubrication, anti-foaming, and cooling properties for titanium alloys. The synthetic ester and sulfurized polymeric ester, combined as lubricants, work synergistically with other components to impart excellent extreme pressure and oxidation resistance, ensuring stable lubrication and rust prevention even under harsh conditions such as high temperature and high pressure. Furthermore, this cutting fluid not only meets the machining requirements of materials, significantly reducing the coefficient of friction during machining, decreasing cutting force and temperature, and protecting tools and workpieces from wear and burns, but also contains no formaldehyde-releasing materials, complying with RoHS 2.0 environmental requirements. It is an environmentally friendly, highly lubricating, highly cooling, and highly stable semi-synthetic cutting fluid for titanium alloys.

[0009] In a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the synthetic acid ester is trimethylolpropane nonanoate and / or isopropyl dodecanoate.

[0010] In a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the vulcanized polymer ester is polydithiocarbamate.

[0011] In a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the mass ratio of the synthetic ester to the sulfurized polymeric ester is (7-9):1.

[0012] Through research on the content ratio of each component in the semi-synthetic cutting fluid of titanium alloy, the inventors found that the content ratio of each component has a significant impact on the performance of the semi-synthetic cutting fluid of titanium alloy. When the mass ratio of synthetic acid ester to sulfurized polymeric ester is (7-9):1, the obtained semi-synthetic cutting fluid of titanium alloy has better corrosion inhibition performance, lubrication performance, anti-foaming performance, cooling performance and stability.

[0013] As a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the rust inhibitor includes 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoic acid)-1,3,5-triazine and sebacic acid.

[0014] Preferably, the mass ratio of 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoic acid)-1,3,5-triazine and sebacic acid is (3-5):(1-2):1.

[0015] The preparation method of the rust inhibitor in the semi-synthetic cutting fluid for titanium alloys of this invention is as follows: 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoic acid)-1,3,5-triazine, and sebacic acid are mixed and stirred. The synergistic effect of 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoic acid)-1,3,5-triazine, and sebacic acid allows the rust inhibitor to form strong chemical bonds with the metal, thereby adsorbing onto the metal surface to form a dense protective film, preventing corrosive media such as oxygen and moisture from eroding the metal, and providing a long-lasting rust-preventive effect. Furthermore, the prepared rust-preventive composite agent, together with other components, gives the semi-synthetic cutting fluid for titanium alloys excellent dispersibility and stability, better protecting titanium alloy workpieces from oxidation or corrosion during use and further extending the overall service life of the cutting fluid.

[0016] In a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the surfactant is at least one selected from vegetable oleic acid ethoxyalkyl alcohol amide, amide-3 ether carboxylic acid, and oleyl alcohol polyether-10 carboxylic acid.

[0017] Preferably, the surfactant is oleic acid ethoxyalkanolamide and oleyl alcohol polyether-10 carboxylic acid; the mass ratio of oleic acid ethoxyalkanolamide to oleyl alcohol polyether-10 carboxylic acid is (1-3):1; more preferably, the mass ratio of oleic acid ethoxyalkanolamide to oleyl alcohol polyether-10 carboxylic acid is 2:1.

[0018] As a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the alkali reserve agent is at least one selected from 2-amino-2-methylpropanol, triethanolamine, 2-(aminoethoxy)ethanol and N,N',N”-trimethylpropane-1,3-diamine.

[0019] Preferably, the alkali stockpile is N,N',N”-trimethylpropane-1,3-diamine.

[0020] In a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the mass ratio of the alkali reserve agent to the bactericide is (2-4):1.

[0021] In a preferred embodiment of the present invention, the titanium alloy corrosion inhibitor is at least one of organosiloxanes, silicate corrosion inhibitors, and polycarboxylic acids.

[0022] Preferably, the corrosion inhibitor for the titanium alloy is an organosiloxane.

[0023] In a preferred embodiment of the present invention, the dispersant is at least one of acrylic acid-ethyl acrylate-itaconic acid copolymer, ammonium salt solution of acrylate copolymer, and modified styrene-maleic acid copolymer.

[0024] Preferably, the dispersant is an acrylic acid-ethyl acrylate-itaconic acid copolymer.

[0025] In a preferred embodiment of the present invention, the coupling agent is at least one of methylcellulose and 3-butoxypropylamine.

[0026] Preferably, the coupling agent is 3-butoxypropylamine.

[0027] In a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the defoamer is at least one of modified polysiloxane, polyether compound and polyurethane.

[0028] Preferably, the defoamer is a modified polysiloxane and polyether compound.

[0029] In a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the bactericide comprises 2-methyl-4-isothiazolin-3-one and 1,2-benzisothiazolin-3-one; the mass ratio of 2-methyl-4-isothiazolin-3-one to 1,2-benzisothiazolin-3-one is (1-2):1; preferably, the mass ratio of 2-methyl-4-isothiazolin-3-one to 1,2-benzisothiazolin-3-one is 1:1.

[0030] The bactericide in the semi-synthetic cutting fluid for titanium alloys of this invention is a compound of 2-methyl-4-isothiazolin-3-one and 1,2-benzisothiazolin-3-one. It is free of chlorine, formaldehyde, formaldehyde release agents and volatile organic compounds (VOCs), and has the characteristics of high temperature resistance and strong alkali resistance. In addition, it does not contain metal ions, has low irritation to emulsions and emulsifiers, reduces the risk of adverse reactions with emulsions and emulsifiers, protects the stability and performance of the cutting fluid, and avoids potential contamination of the workpiece surface by metal ions. Meanwhile, the synergistic effect of 2-methyl-4-isothiazolin-3-one and 1,2-benzisothiazolin-3-one enables this bactericide to comprehensively capture and rapidly inhibit the growth of microorganisms, including common bacteria, fungi, and algae, and even effectively remove biofilms and headspace molds, ensuring the cleanliness of the cutting fluid and the hygiene of the processing environment. In addition, the combined action of 2-methyl-4-isothiazolin-3-one and 1,2-benzisothiazolin-3-one with other components gives the titanium alloy semi-synthetic cutting fluid excellent stability and corrosion resistance, which not only ensures the cleanliness and quality of the machining process, but also improves cutting efficiency and protects tools and workpieces, reducing production costs and scrap rates.

[0031] Secondly, the present invention provides the application of the titanium alloy semi-synthetic cutting fluid in the cutting and machining of aerospace parts, medical device materials, and electronic equipment.

[0032] The titanium alloy semi-synthetic cutting fluid of the present invention fully demonstrates its significant advantages in improving processing efficiency, protecting tools and workpieces, maintaining a clean processing environment, and extending the service life of cutting fluid due to its excellent cooling, lubrication, rust prevention, stability, and environmental friendliness. It can effectively extend the service life of tools and protect the processing quality and subsequent performance of workpieces during the cutting of difficult-to-machine materials such as titanium alloys, and can be applied to the manufacture of aerospace parts, medical device materials, and electronic equipment.

[0033] Thirdly, the present invention provides a method for preparing the semi-synthetic cutting fluid for titanium alloys, comprising the following steps: mixing and stirring base oil, alkali stocking agent, titanium alloy corrosion inhibitor, and dispersant evenly; adding coupling agent, rust inhibitor, lubricant, surfactant, and bactericide and stirring evenly; then adding water and stirring; finally adding defoamer and stirring to obtain the fluid.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows: First, the titanium alloy semi-synthetic cutting fluid of the present invention can effectively prevent oxidation and corrosion of the workpiece during the processing, ensuring the processing quality and subsequent performance of the workpiece; it significantly reduces cutting force and friction coefficient, reduces tool wear, and improves processing efficiency and surface finish; it can quickly eliminate foam, maintaining the cleanliness and effectiveness of the cutting fluid; and it effectively reduces cutting temperature, protecting the tool and workpiece from high-temperature damage. Second, the titanium alloy semi-synthetic cutting fluid of the present invention does not contain formaldehyde-releasing materials, complies with the environmental protection RoHS 2.0 requirements, and reduces harm to the environment and operators. Finally, the preparation method of the titanium alloy semi-synthetic cutting fluid of the present invention does not require special processes and equipment, is simple to operate, can achieve industrial production, and meet the needs of large-scale processing. Detailed Implementation

[0035] To better illustrate the objectives, technical solutions, and advantages of this invention, the invention will be further described below with reference to specific embodiments. Those skilled in the art should understand that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0036] Unless otherwise specified, the experimental methods used in the examples are conventional methods; the materials, reagents, equipment, etc. used are all commercially available unless otherwise specified.

[0037] The names and sources of the raw materials used in the embodiments and comparative examples of this invention are shown in Table 1, but are not limited to these materials:

[0038] Table 1 Raw Materials and Manufacturers

[0039] Raw material name model Manufacturer Naphthenic oil 1004 Panjin Mingyu Petrochemical Co., Ltd. Organosiloxane corrosion inhibitors XP40 BASF Silicate sustained-release agent SA-785 Hangzhou Lvpu Chemical Technology Co., Ltd. Polycarboxylic acid TECNOCR 1905 Tecnofluid SRL Trimethylolpropane nonanoate Matrilox LP101m Tecnofluid SRL Polydithiocarbamate T323 Shandong Ruixing Flame Retardant Technology Co., Ltd. Acrylic acid-ethyl acrylate-itaconic acid copolymer HC0604 Shanghai Zhouyuan Biotechnology Co., Ltd. ammonium salt solution of acrylate copolymer Dispex*CX 4340 BASF Modified styrene-maleic acid copolymer DISPERBYK-190 Troy Methylcellulose MC Ashland Vegetable oleic acid ethoxyalkyl alcohol amide TECNOCOR ODL Tecnofluid SRL Oleol polyether-10 carboxylic acid AKYPO RO90VG KAO CHEMICALS EUROPE Amide-3 ether carboxylic acid AKYPO RO20VG KAO CHEMICALS EUROPE Modified polysiloxanes and polyether compounds BYK-028 Troy polyurethane YRXP-07B Guangzhou Yourun Synthetic Materials Co., Ltd.

[0040] In the following examples and comparative examples, the method for preparing the rust inhibitor is as follows: 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoic acid)-1,3,5-triazine and sebacic acid are mixed and stirred for 1 hour to obtain the rust inhibitor.

[0041] The preparation method of the titanium alloy semi-synthetic cutting fluid involved in the following examples and comparative examples is as follows: First, the base oil is added to the reaction vessel and stirred evenly with the alkali stock agent, titanium alloy corrosion inhibitor and dispersant; then, the coupling agent, rust inhibitor, lubricant, surfactant and bactericide are added and stirred evenly; then, deionized water is added and stirred evenly for 30 minutes; finally, the defoamer is added and stirred at room temperature for 1 hour to obtain the titanium alloy semi-synthetic cutting fluid.

[0042] The raw materials (by weight) of the titanium alloy semi-synthetic cutting fluids of Examples 1-9 and Comparative Examples 1-9 are shown in Tables 2 and 3.

[0043] Table 2. Raw material ratios (parts by weight) of the titanium alloy semi-synthetic cutting fluid in the embodiments of the present invention.

[0044]

[0045]

[0046] Table 3. Raw material ratios (parts by weight) of the comparative titanium alloy semi-synthetic cutting fluid of the present invention.

[0047]

[0048]

[0049] Test Example: Performance Testing of Semi-Synthetic Cutting Fluid for Titanium Alloys

[0050] (1) Stability test: 50 mL of the titanium alloy semi-synthetic cutting fluid stock solution from Examples 1-9 and Comparative Examples 1-9 was placed in a constant temperature drying oven (70℃±3℃) to simulate a high-temperature environment and left to stand for 5 hours. Afterward, it was removed and cooled to room temperature (15℃~35℃) for 3 hours, and then placed in a low-temperature environment (-12℃±3℃) for 24 hours. After being removed and allowed to stand at room temperature for 1 hour, no stratification, phase change, or gel-like phenomena were observed. The fluid recovered its original state after the test, indicating that the titanium alloy semi-synthetic cutting fluid has good stability.

[0051] The titanium alloy semi-synthetic cutting fluids prepared in Examples 1-9 and Comparative Examples 1-9 were diluted with deionized water to a mass fraction of 5%, and their performance was tested.

[0052] (2) Corrosion, rust prevention and defoaming performance test: The dilutions of the titanium alloy semi-synthetic cutting fluids of Examples 1-9 and Comparative Examples 1-9 were tested for corrosion, rust prevention and defoaming performance using the test methods of GB / T 6144 standard.

[0053] (3) Wear resistance test: The wear resistance (wear scar diameter) of the diluted titanium alloy semi-synthetic cutting fluids of Examples 1-9 and Comparative Examples 1-9 was tested using the ASTM D4172 standard test method. The smaller the wear scar diameter, the better the wear resistance of the titanium alloy semi-synthetic cutting fluid, and the longer it can protect the contact surface from wear.

[0054] (4) Average Torque Test: The average torque force required by the diluted titanium alloy semi-synthetic cutting fluids of Examples 1-9 and Comparative Examples 1-19 during the cutting or deformation process in metal processing was measured using a Microtap Teast system to simulate the on-site machining process (using a Ti alloy plate, at room temperature, a rotation speed of 800 rpm, a maximum torque of 400 Ncm, and a tapping depth of 20 mm). The average torque force reflects the magnitude of the interaction force between the tool and the workpiece during the cutting process. A lower average torque force means a smoother cutting process and less resistance to the tool, which helps to reduce cutting heat and cutting force during the cutting process, thereby reducing the risk of tool wear and workpiece deformation.

[0055] (5) Cooling performance test: The Microtap Teast system was used to simulate the on-site machining process (using a Ti alloy plate, at room temperature, a rotation speed of 800 rpm, a maximum torque of 400 Ncm, and a tapping diameter of 20 mm) to measure the cooling performance of the diluted titanium alloy semi-synthetic cutting fluids of Examples 1-9 and Comparative Examples 1-19 during the cutting or deformation process in metal processing. Cooling performance T [°C] indicates the temperature change value of the cutting zone during the cutting process after using the cutting fluid. A smaller temperature change value means that the cutting fluid can maintain the temperature change during the cutting process in a relatively stable state, indicating that it can effectively remove the heat during the cutting process and prevent the local temperature from becoming too high, which would lead to overheating of the tool and workpiece.

[0056] Table 4 Performance test results of titanium alloy semi-synthetic cutting fluid

[0057]

[0058]

[0059]

[0060]

[0061] As shown in Table 4, the titanium alloy semi-synthetic cutting fluid prepared using specific amounts of lubricant, surfactant, bactericide, and rust inhibitor in this embodiment exhibits excellent stability in its stock solution. It maintains a yellow and transparent state for an extended period without stratification, precipitation, or deterioration. When diluted to a concentration of 5%, its pH value remains stable between 9.26 and 9.58, meeting the requirements for cutting fluid use. Furthermore, its corrosion and rust prevention properties comply with GB / T 6144 standards, achieving grade AB. This indicates that the titanium alloy semi-synthetic cutting fluid of this embodiment can effectively prevent corrosion and rust damage to titanium alloys and other metals during processing. It also demonstrates excellent defoaming performance, with a defoaming time of 9-20 seconds. Furthermore, the titanium alloy semi-synthetic cutting fluid of this invention exhibits excellent anti-wear performance according to the ASTM D4172 standard test, with a wear scar diameter of 0.420 mm-0.608 mm. This proves that it can effectively reduce tool and workpiece wear during the cutting process. When simulating the on-site machining process using the Microtap teast system, the titanium alloy semi-synthetic cutting fluid of this invention has an average torque force between 99.4 Ncm and 125.6 Ncm, and a cooling performance T of 3.15℃-5.82℃.

[0062] Compared to Example 1, the semi-synthetic titanium alloy cutting fluids in Comparative Examples 1 and 2 used trimethylolpropane nonanoate and polydithiocarbamate in mass ratios of 27:1 and 5:1, respectively, resulting in poor anti-wear and lubrication properties. The semi-synthetic titanium alloy cutting fluids in Comparative Examples 3 and 4 did not use polydithiocarbamate as a lubricant, resulting in poor anti-wear, lubrication, and cooling properties. The semi-synthetic titanium alloy cutting fluids in Comparative Examples 5, 6, and 7 did not use 2-methyl-4-isothiazolin-3-one and 1,2-dimethylolpropane nonanoate as bactericides. The combination of benzisothiazolin-3-one or its mass ratio not being (1-2):1 resulted in poor stability, poor defoaming performance, and poor cooling performance of the cutting fluid in Comparative Example 5; poor stability and poor cooling performance of the cutting fluid in Comparative Example 6; poor stability and poor cooling performance of the cutting fluid in Comparative Example 7; and the rust inhibitors of the titanium alloy semi-synthetic cutting fluids in Comparative Examples 8 and 9 did not use the combination of 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoic acid)-1,3,5-triazine, and sebacic acid, resulting in poor rust prevention performance and long defoaming time of the cutting fluids in Comparative Examples 8 and 9.

[0063] Therefore, the titanium alloy cutting fluid prepared using the specific components of this invention exhibits excellent stability, lubrication, corrosion resistance, defoaming, and cooling properties. It can effectively prevent oxidation and corrosion of titanium alloy materials during processing, ensuring the processing quality and subsequent performance of the materials; significantly reduce cutting forces and friction coefficients during processing, reduce tool wear, and improve processing efficiency and surface finish; rapidly eliminate foam, maintaining the cleanliness and effectiveness of the cutting fluid; and effectively reduce cutting temperature, protecting tools and workpieces from high-temperature damage.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A semi-synthetic cutting fluid for titanium alloys, characterized in that, The product comprises the following components in parts by weight: 20-25 parts base oil, 5-15 parts alkali stockpile, 5-10 parts rust inhibitor, 2-5 parts titanium alloy corrosion inhibitor, 20-30 parts lubricant, 3-6 parts dispersant, 3-5 parts coupling agent, 3-6 parts surfactant, 2-4 parts bactericide, and 0.05-0.2 parts defoamer; the lubricant includes synthetic esters and polydithiocarbamates; the synthetic esters include trimethylolpropane nonanoate and / or isopropyl dodecanoate; the mass ratio of the synthetic esters to the polydithiocarbamates is (6-11):1; the rust inhibitor includes 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoic acid)-1,3,5-triazine, and sebacic acid.

2. The titanium alloy semi-synthetic cutting fluid according to claim 1, characterized in that, The mass ratio of the synthetic ester to the polydithiocarbamate is (7-9):

1.

3. The titanium alloy semi-synthetic cutting fluid according to claim 1, characterized in that, The mass ratio of 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoic acid)-1,3,5-triazine and sebacic acid is (3-5):(1-2):

1.

4. The titanium alloy semi-synthetic cutting fluid according to claim 1, characterized in that, The surfactant is at least one of oleic acid ethoxyalkyl alcohol amide and oleyl alcohol polyether-10-carboxylic acid.

5. The titanium alloy semi-synthetic cutting fluid according to claim 1, characterized in that, The bactericide comprises 2-methyl-4-isothiazolin-3-one and 1,2-benzisothiazolin-3-one; the mass ratio of the 2-methyl-4-isothiazolin-3-one to the 1,2-benzisothiazolin-3-one is (1-2):

1.

6. The application of the titanium alloy semi-synthetic cutting fluid according to any one of claims 1-5 in the cutting and machining of aerospace parts, medical device materials, and electronic equipment.

7. The method for preparing the titanium alloy semi-synthetic cutting fluid according to any one of claims 1-5, characterized in that, The process includes the following steps: mixing the base oil, alkali reserve agent, titanium alloy corrosion inhibitor, and dispersant evenly; adding the coupling agent, rust inhibitor, lubricant, surfactant, and bactericide and mixing evenly; then adding water and mixing; finally adding the defoamer and mixing.

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