Titanium alloy semi-synthetic cutting fluid as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of cutting processing, and discloses a titanium alloy semi-synthetic cutting fluid as well as a preparation method and application thereof. The titanium alloy semi-synthetic cutting fluid comprises the following components in parts by weight: 20-25 parts of base oil, 5-15 parts of an alkali storage agent, 5-10 parts of an antirust agent, 2-5 parts of a titanium alloy corrosion inhibitor, 20-30 parts of a lubricant, 3-6 parts of a dispersant, 3-5 parts of a coupling agent, 3-6 parts of a surfactant, 2-4 parts of a bactericide and 0.05-0.2 part of a defoaming agent. The titanium alloy semi-synthetic cutting fluid has excellent titanium alloy corrosion inhibition performance, lubricating performance, defoaming performance, cooling performance and stability, can be applied to the cutting machining process of titanium alloy and other metal materials difficult to machine, can meet the machining requirements of the materials, reduces the cutting force and the cutting temperature in the cutting process, and improves the cutting efficiency. And moreover, the cutting fluid does not contain formaldehyde-releasing materials, and meets the requirements of environmental protection RoHS2.0 (Restriction of Hazardous Substances 2.0).

Description

Technical Field

[0001] The invention relates to the technical field of cutting processing, and in particular to a titanium alloy semi-synthetic cutting fluid and a preparation method and application thereof. Background Art

[0002] Titanium alloy has the advantages of high specific strength, strong corrosion resistance, high temperature resistance and good biocompatibility. It can be used in aerospace, biomedicine, electronics industry and other fields. In the next 20 years, titanium alloy will gradually replace aluminum alloy as the main material for aircraft manufacturing. For example, important parts such as landing gear and turbine blades are made of titanium alloy. Titanium alloy accounts for 40% of the structural mass of the F22 fighter fuselage, and each C919 large aircraft requires about 200,000 titanium alloy fasteners. The proportion of titanium alloy usage has become one of the important indicators of the advanced level of aircraft. At the same time, titanium alloy is also one of the most commonly used materials in the medical field. It can be used to manufacture bone implants, artificial joints and dental restorations. Its biocompatibility and good mechanical properties make it an ideal medical device material. Titanium alloy is used in electronic housings, connectors and aerospace electronic equipment in the electronics field, mainly using its electrical conductivity and lightweight properties. However, in the high-speed cutting process of titanium alloy, there are problems such as excessive cutting temperature, severe tool sticking, severe tool wear, and poor surface quality. In addition, titanium alloy has poor thermal conductivity and high chemical activity, which makes processing and lubrication difficult, thereby limiting its processing efficiency and quality.

[0003] The existing titanium alloy semi-synthetic cutting fluids have the following main deficiencies: (1) insufficient cooling performance, causing the workpiece and tool to overheat during the cutting process; (2) poor lubrication effect, unable to reduce tool wear while ensuring the quality of the cutting surface; (3) strong corrosiveness, causing corrosion to the workpiece and machine tools; (4) containing harmful chemicals, and the cutting waste fluids produced have 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, lubricity, stability and corrosion inhibition and whose waste liquid will not pollute the water environment. Summary of the invention

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

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows: In the first aspect, the present invention provides a titanium alloy semi-synthetic cutting fluid, comprising the following components in parts by weight: 20-25 parts of base oil, 5-15 parts of alkali reserve agent, 5-10 parts of rust inhibitor, 2-5 parts of titanium alloy corrosion inhibitor, 20-30 parts of lubricant, 3-6 parts of dispersant, 3-5 parts of coupling agent, 3-6 parts of surfactant, 2-4 parts of bactericide and 0.05-0.2 parts of defoaming agent; the lubricant comprises synthetic acid ester and sulfurized polymer ester; the mass ratio of the synthetic acid ester to the sulfurized polymer ester is (6-11):1.

[0007] The titanium alloy semi-synthetic cutting fluid obtained by compounding base oil, alkali reserve agent, rust inhibitor, titanium alloy corrosion inhibitor, lubricant, dispersant, coupling agent, surfactant, bactericide and defoamer of the present invention has excellent titanium alloy corrosion inhibition performance, lubrication performance, anti-foaming performance and cooling performance. Among them, synthetic acid ester and sulfurized polymer ester are compounded as lubricants, and other components are coordinated to give the cutting fluid good extreme pressure performance and antioxidant performance, so that it can still maintain stable lubrication and rust prevention effects under harsh conditions such as high temperature and high pressure; in addition, the cutting fluid compounded by the components of the present invention not only meets the mechanical processing requirements of the material, but also can significantly reduce the friction coefficient in the cutting process, reduce the cutting force and cutting temperature in the cutting process, protect the tool and the workpiece from wear and burns, and does not contain formaldehyde-releasing materials, meets the environmental protection ROHS2.0 requirements, and is an environmentally friendly, highly lubricating, highly cooling, and highly stable titanium alloy semi-synthetic cutting fluid.

[0008] As a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the synthetic acid ester is trimethylolpropane nonanoic acid ester and / or isopropyl dodecanoate.

[0009] As a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the sulfurized polymer ester is polydithiocarbamate.

[0010] As a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the mass ratio of the synthetic acid ester to the sulfurized polymer ester is (7-9):1.

[0011] Through the study of the content ratio of each component in the titanium alloy semi-synthetic cutting fluid, the inventors found that the content ratio of each component has a significant effect on the performance of the titanium alloy semi-synthetic cutting fluid. When the mass ratio of the synthetic acid ester and the sulfurized polymer ester is (7-9):1, the obtained titanium alloy semi-synthetic cutting fluid has better corrosion inhibition, lubrication, anti-foaming, cooling and stability.

[0012] 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-aminohexanoyl)-1,3,5-triazine and sebacic acid.

[0013] Preferably, the mass ratio of the 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoyl)-1,3,5-triazine and sebacic acid is (3-5):(1-2):1.

[0014] The preparation method of the rust inhibitor in the titanium alloy semi-synthetic cutting fluid of the present invention is: 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoyl)-1,3,5-triazine and sebacic acid are mixed and stirred to prepare the product. Among them, the synergistic effect of 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoyl)-1,3,5-triazine and sebacic acid allows the rust inhibitor to form a strong chemical bond with the metal, thereby being adsorbed on the metal surface to form a dense protective film, preventing corrosive media such as oxygen and moisture from corroding the metal, and providing a lasting rust-proof effect. In addition, the prepared rust-proof composite agent and other components work together to make the titanium alloy semi-synthetic cutting fluid have excellent dispersibility and stability, which can better protect the titanium alloy workpiece from oxidation or corrosion during use and further extend the overall service life of the cutting fluid.

[0015] As a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the surfactant is at least one of vegetable oil ethoxylated alkanolamide, amide-3 ether carboxylic acid and oleth-10 carboxylic acid.

[0016] Preferably, the surfactant is vegetable oil acid ethoxylated alkanolamide and oleth-10 carboxylic acid; the mass ratio of the vegetable oil acid ethoxylated alkanolamide and the oleth-10 carboxylic acid is (1-3):1; more preferably, the mass ratio of the vegetable oil acid ethoxylated alkanolamide and the oleth-10 carboxylic acid is 2:1.

[0017] As a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the alkali reserve agent is at least one of 2-amino-2-methylpropanol, triethanolamine, 2-(aminoethoxy)ethanol and N,N',N"-trimethylpropane-1,3-diamine.

[0018] Preferably, the base reserve agent is N,N',N"-trimethylpropane-1,3-diamine.

[0019] As 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.

[0020] As a preferred embodiment of the present invention, the titanium alloy corrosion inhibitor is at least one of organic siloxanes, silicate corrosion inhibitors and polycarboxylic acids.

[0021] Preferably, the titanium alloy corrosion inhibitor is an organosiloxane.

[0022] As 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 acrylic acid ester copolymer and modified styrene maleic acid copolymer.

[0023] Preferably, the dispersant is acrylic acid-ethyl acrylate-itaconic acid copolymer.

[0024] As a preferred embodiment of the present invention, the coupling agent is at least one of methyl cellulose and 3-butoxypropylamine.

[0025] Preferably, the coupling agent is 3-butoxypropylamine.

[0026] As a preferred embodiment of the titanium alloy semi-synthetic cutting fluid of the present invention, the defoaming agent is at least one of modified polysiloxane, polyether compound and polyurethane.

[0027] Preferably, the defoaming agent is a modified polysiloxane and a polyether compound.

[0028] As a preferred embodiment of the titanium alloy semi-synthetic cutting fluid described in the present invention, the bactericide includes 2-methyl-4-isothiazoline-3-one and 1,2-benzisothiazolin-3-one; the mass ratio of the 2-methyl-4-isothiazoline-3-one and the 1,2-benzisothiazolin-3-one is (1-2):1; preferably, the mass ratio of the 2-methyl-4-isothiazoline-3-one and the 1,2-benzisothiazolin-3-one is 1:1.

[0029] The bactericide in the titanium alloy semi-synthetic cutting fluid of the present invention is compounded by 2-methyl-4-isothiazoline-3-one and 1,2-benzisothiazolin-3-one, does not contain chlorine, formaldehyde, formaldehyde releaser and volatile organic compounds (VOC), has the characteristics of high temperature resistance, strong alkali resistance and the like; and 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 surface of the workpiece by metal ions. At the same time, the synergistic effect of 2-methyl-4-isothiazoline-3-one and 1,2-benzisothiazolin-3-one enables the fungicide to capture and quickly inhibit the growth of microorganisms in all directions, including common bacteria, fungi and algae, and can even effectively remove biofilms and headspace molds, ensuring the cleanliness of the cutting fluid and the hygiene of the processing environment; in addition, 2-methyl-4-isothiazoline-3-one and 1,2-benzisothiazolin-3-one work together with other components to make the titanium alloy semi-synthetic cutting fluid have excellent stability and corrosion resistance, which can not only ensure the cleanliness and processing quality of the processing, but also improve cutting efficiency and protect tools and workpieces, reducing production costs and scrap rates.

[0030] In a second aspect, the present invention provides the use of the titanium alloy semi-synthetic cutting fluid in the cutting processing of aerospace parts, medical device materials, and electronic equipment.

[0031] The titanium alloy semi-synthetic cutting fluid of the present invention fully demonstrates its remarkable advantages in improving processing efficiency, protecting tools and workpieces, maintaining a clean processing environment, and extending the service life of the cutting fluid due to its excellent cooling, lubrication, rust prevention, stability, and environmental protection. It can effectively extend the service life of the tool during the cutting process of difficult-to-process materials such as titanium alloys, and protect the processing quality and subsequent use performance of the workpiece, and is further used in the preparation of aerospace parts, medical device materials, and electronic equipment.

[0032] In a third aspect, the present invention provides a method for preparing the titanium alloy semi-synthetic cutting fluid, comprising the following steps: mixing the base oil, alkali reserve agent, titanium alloy corrosion inhibitor, and dispersant and stirring evenly; adding a coupling agent, a rust inhibitor, a lubricant, a surfactant, and a bactericide and stirring evenly; then adding water and stirring; finally adding a defoaming agent and stirring.

[0033] 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, thereby ensuring the processing quality and subsequent use performance of the workpiece; significantly reduce cutting force and friction coefficient, reduce tool wear, and improve processing efficiency and its surface finish; can quickly eliminate foam and keep the cutting fluid clean and effective; effectively reduce cutting temperature and protect tools and workpieces from high temperature damage; secondly, the titanium alloy semi-synthetic cutting fluid of the present invention does not contain formaldehyde-releasing materials, meets the environmental protection RoHS2.0 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 easy to operate, can realize industrial production, and meet large-scale processing needs. DETAILED DESCRIPTION

[0034] To better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments. It should be understood by those skilled in the art that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] Unless otherwise specified, the experimental methods used in the examples are all conventional methods; the materials, reagents, equipment, etc. used, unless otherwise specified, can be obtained from commercial channels.

[0036] The names and sources of the raw materials used in the examples and comparative examples of the present invention are shown in Table 1, but are not limited to these materials: Table 1 Raw materials and manufacturers Raw material name model Manufacturer Naphthenic Oil 1004 Panjin Mingyu Petrochemical Co., Ltd. Organosiloxane Corrosion Inhibitor XP40 BASF Silicate slow-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 oil ethoxylated alkanolamide TECNOCOR ODL Tecnofluid SRL Oleth-10 Carboxylic Acid AKYPO RO90VG KAO CHEMICALS EUROPE Amide-3-ether carboxylic acid AKYPO RO20VG KAO CHEMICALS EUROPE Modified polysiloxane and polyether compounds BYK-028 Troy Polyurethane YRXP-07B Guangzhou Yourun Synthetic Materials Co., Ltd. In the following examples and comparative examples, the preparation method of the rust inhibitor involved is: 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoyl)-1,3,5-triazine and sebacic acid are mixed and stirred for 1 hour to prepare the rust inhibitor.

[0037] In the following embodiments and comparative examples, the preparation method of the titanium alloy semi-synthetic cutting fluid involved is: first add the base oil into the reactor and stir evenly with the alkali reserve agent, titanium alloy corrosion inhibitor and dispersant; add the coupling agent, rust inhibitor, lubricant, surfactant, and bactericide and stir evenly, then add deionized water and stir evenly for 30 minutes, and finally add the defoaming agent and stir at room temperature for 1 hour to obtain the titanium alloy semi-synthetic cutting fluid.

[0038] The raw materials (by weight) of the titanium alloy semi-synthetic cutting fluids of the following Examples 1-9 and Comparative Examples 1-9 are shown in Table 2 and Table 3.

[0039] Table 2 Raw material ratio of titanium alloy semi-synthetic cutting fluid of the embodiment of the present invention (parts by weight) Table 3 Raw material ratio of titanium alloy semi-synthetic cutting fluid of the comparative example of the present invention (parts by weight) Test example: Performance test of titanium alloy semi-synthetic cutting fluid (1) Stability test: 50 mL of the titanium alloy semi-synthetic cutting fluid stock solution of the above-mentioned Examples 1-9 and Comparative Examples 1-9 was placed in a constant temperature drying oven (70°C ± 3°C) to simulate a high temperature environment and allowed to stand for 5 hours, then taken out and cooled to room temperature (15°C to 35°C), left for 3 hours, and then placed in a low temperature environment (-12°C ± 3°C) for 24 hours. After being taken out and allowed to stand at room temperature for 1 hour, there was no stratification, phase change, or gelatinous state, and it could be restored to its original state after the test, indicating that the titanium alloy semi-synthetic cutting fluid had good stability.

[0040] After the titanium alloy semi-synthetic cutting fluids prepared in Examples 1-9 and Comparative Examples 1-9 were diluted with deionized water to a dilution having a mass fraction of 5%, their performance was tested.

[0041] (2) Corrosion, rust prevention and defoaming performance test: The dilutions of the titanium alloy semi-synthetic cutting fluids of the above-mentioned Examples 1-9 and Comparative Examples 1-9 were subjected to corrosion, rust prevention and defoaming test using the test method of GB / T 6144 standard.

[0042] (3) Anti-wear performance test: The anti-wear performance (wear spot diameter) of the diluted titanium alloy semi-synthetic cutting fluid of the above-mentioned Examples 1-9 and Comparative Examples 1-9 was tested using the ASTM D4172 standard test method; the smaller the wear spot diameter, the better the anti-wear performance of the titanium alloy semi-synthetic cutting fluid, which can protect the contact surface from wear for a longer period of time.

[0043] (4) Average torque test: The Microtap teast system was used to simulate the on-site processing process (using a Ti alloy plate, at room temperature, a rotation speed of 800 rpm, a maximum torque of 400 Ncm, and a tapping of 20 mm) to measure the average torque required for the dilution of the titanium alloy semi-synthetic cutting fluid of the above-mentioned Examples 1-9 and Comparative Examples 1-19 during the cutting or deformation process of the metal processing process. The average torque reflects the magnitude of the interaction force between the tool and the workpiece during the cutting process. A smaller average torque means that the cutting process is smoother and the tool is subject to less resistance, which is conducive to reducing the cutting heat and cutting force during the cutting process, thereby reducing the risk of tool wear and workpiece deformation.

[0044] (5) Cooling performance test: The Microtap teast system was used to simulate the on-site processing process (using a Ti alloy plate, at room temperature, a rotation speed of 800 rpm, a maximum torque of 400 Ncm, and a tapping of 20 mm) to measure the cooling performance of the diluted titanium alloy semi-synthetic cutting fluid of the above Examples 1-9 and Comparative Examples 1-19 during the cutting or deformation process during metal processing. The cooling property T [°C] indicates the temperature change value of the cutting zone during the cutting process after the cutting fluid is used. A smaller temperature change value means that the cutting fluid can maintain the temperature change of the cutting process in a relatively stable state, indicating that it can effectively take away the heat during the cutting process and prevent the local temperature from being too high during the cutting process, resulting in overheating of the tool and the workpiece.

[0045] Table 4 Performance test results of titanium alloy semi-synthetic cutting fluid From the data in Table 4, it can be seen that the titanium alloy semi-synthetic cutting fluid prepared by the embodiment of the present invention adopts specific contents of lubricants, surfactants, bactericides and rust inhibitors, and its stock solution has excellent stability, can maintain a yellow and transparent state for a long time, and does not undergo stratification, precipitation or deterioration. When the stock solution is diluted to a concentration of 5%, its pH value is stabilized between 9.26-9.58, which meets the use requirements of the cutting fluid; at the same time, its corrosion and rust prevention performance meets the GB / T 6144 standard and reaches AB grade, which means that the titanium alloy semi-synthetic cutting fluid of the embodiment of the present invention can effectively prevent titanium alloy and other metals from being damaged by corrosion and rust during the processing; and its defoaming performance is excellent, and the defoaming time is 9s-20s. In addition, through the test of ASTMD4172 standard, the titanium alloy semi-synthetic cutting fluid of the embodiment of the present invention has excellent anti-wear performance, and its wear spot diameter is 0.420mm-0.608mm, which proves that it can effectively reduce the wear of tools and workpieces during the cutting process; and when the Microtap teast system is used to simulate the on-site processing process, the titanium alloy semi-synthetic cutting fluid of the embodiment of the present invention has an average torque between 99.4Ncm-125.6Ncm; the cooling performance T is 3.15℃-5.82℃.

[0046] Compared with Example 1, the mass ratios of trimethylolpropane nonanoate and polydithiocarbamate used in the lubricant of the titanium alloy semi-synthetic cutting fluid of Comparative Examples 1 and 2 are 27:1 and 5:1, so that the cutting fluids of Comparative Examples 1 and 2 have poor wear resistance and lubrication performance; the lubricant of the titanium alloy semi-synthetic cutting fluid of Comparative Examples 3 and 4 does not use polydithiocarbamate, so that the cutting fluids of Comparative Examples 3 and 4 have poor wear resistance, lubrication and cooling performance; the bactericide of the titanium alloy semi-synthetic cutting fluid of Comparative Examples 5, 6 and 7 does not use 2-methyl-4-isothiazoline-3-one and 1,2 The compounding of benzisothiazoline-3-one or its mass ratio is not (1-2):1, so that the cutting fluid of comparative example 5 has poor stability, poor defoaming performance, and poor cooling performance; the cutting fluid of comparative example 6 has poor stability and poor cooling performance; the cutting fluid of comparative example 7 has poor stability and poor cooling performance; the rust inhibitor of the titanium alloy semi-synthetic cutting fluid of comparative examples 8 and 9 does not adopt the compounding of 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoyl)-1,3,5-triazine and sebacic acid, so that the cutting fluids of comparative examples 8 and 9 have poor anti-rust performance and long defoaming time.

[0047] It can be seen that the titanium alloy cutting fluid made with the specific content components of the present invention has excellent stability, lubrication, corrosion resistance, defoaming and cooling performance, can effectively prevent the oxidation and corrosion of titanium alloy materials during the processing process, and ensure the processing quality and subsequent use performance of the materials; significantly reduce the cutting force and friction coefficient during the processing, reduce tool wear, and improve processing efficiency and its surface finish; can quickly eliminate foam, keep the cutting fluid clean and effective; effectively reduce the cutting temperature, and protect the tool and workpiece from high temperature damage.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A titanium alloy semi-synthetic cutting fluid, characterized in that: The invention comprises the following components in parts by weight: 20-25 parts of base oil, 5-15 parts of alkali reserve agent, 5-10 parts of rust inhibitor, 2-5 parts of titanium alloy corrosion inhibitor, 20-30 parts of lubricant, 3-6 parts of dispersant, 3-5 parts of coupling agent, 3-6 parts of surfactant, 2-4 parts of bactericide and 0.05-0.2 parts of defoamer; the lubricant comprises synthetic acid ester and sulfurized polymer ester; the mass ratio of the synthetic acid ester to the sulfurized polymer ester is (6-11):

1.

2. The titanium alloy semi-synthetic cutting fluid according to claim 1, characterized in that: The synthetic acid esters include trimethylolpropane nonanoate and / or isopropyl dodecanoate.

3. The titanium alloy semi-synthetic cutting fluid according to claim 1, characterized in that: The sulfurized polymer is polydithiocarbamate.

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

1.

5. The titanium alloy semi-synthetic cutting fluid according to claim 1, characterized in that: The rust inhibitor includes 1-(bis(3-(dimethylamino)propyl)amino)-2-propanol, 2,4,6-tris(6-aminohexanoyl)-1,3,5-triazine and sebacic acid.

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

1.

7. The titanium alloy semi-synthetic cutting fluid according to claim 1, characterized in that: The surfactant is at least one of vegetable oil ethoxylated alkanolamide, amide-3 ether carboxylic acid and oleth-10 carboxylic acid.

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

1.

9. Use of the titanium alloy semi-synthetic cutting fluid according to any one of claims 1 to 8 in the cutting processing of aerospace parts, medical equipment materials, and electronic equipment.

10. The method for preparing the titanium alloy semi-synthetic cutting fluid according to any one of claims 1 to 8, characterized in that: The method comprises 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 stirring evenly; then adding water and stirring; and finally adding the defoamer and stirring to obtain the product.

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