A fully synthetic titanium alloy grinding fluid and its preparation method and application

Abstract

The present invention belongs to the field of titanium alloy processing, and specifically discloses a fully synthetic titanium alloy grinding fluid and its preparation method and application. The fully synthetic titanium alloy grinding fluid of the present invention includes the following components in percentage by mass: 8-23% of alkali reserve agent, 8-20% of water-based lubricant, 9-18% of rust inhibitor, 2-4% of organic alcohol, 0.5-1.5% of metal corrosion inhibitor, 0-2% of sedimentation agent, 0.05-0.1% of defoamer, and 40-60% of water. The fully synthetic titanium alloy grinding fluid of the present invention has excellent cooling property, antioxidant ability and outstanding lubrication and wear resistance, can be recycled for a long time, can ensure processing accuracy and service life of cutting tools; has good cleaning performance, can effectively prevent the phenomenon of titanium alloy powder clogging grinding wheel; and the grinding fluid has good sedimentation, is conducive to processing, non-toxic, low odor, environmentally friendly and pollution-free, low pH value, and has no adverse effects on the skin.

Description

Technical Field

[0001] The invention belongs to the field of titanium alloy processing, and specifically relates to a fully synthetic titanium alloy grinding fluid and a preparation method and application thereof. Background Art

[0002] Titanium alloy is an alloy composed of titanium and other elements. It has the characteristics of light weight, high strength, low elasticity, high temperature resistance and corrosion resistance, and even has memory ability. Titanium is the most compatible metal with the human body and is also used in the medical field, such as heart stents, orthopedic titanium plates, etc. In daily life, some glasses frames, watch frames, mobile phone cases, and some sports equipment also widely use titanium alloys; and the main metal titanium that makes up the titanium alloy is also abundant, so it is highly sought after.

[0003] The hardness of titanium alloy is very high, and the heat transfer coefficient is particularly low, which requires that the lubrication, wear resistance and cooling properties of the processed materials be extremely high during the grinding of titanium alloy. At present, in order to reduce the difficulty of titanium alloy processing, various titanium alloy processing fluids play a vital role. In the early 20th century, in the conventional grinding of titanium alloy, due to the large specific pressure and friction coefficient of titanium alloy grinding, the temperature of the grinding area was extremely high, and the titanium alloy parts had an undesirable high-temperature oxidation reaction, and the surface quality of the workpiece could not be guaranteed. At that time, strong cold grinding was used to spray liquid nitrogen on the surface of the titanium alloy workpiece, and a large amount of heat was quickly absorbed and taken away by the volatilization of nitrogen, thereby ensuring the quality of the grinding process. However, this grinding method is complicated to operate and seriously restricts the processing efficiency of titanium alloy. With the improvement of various technologies, semi-synthetic titanium alloy cutting products have gradually emerged. Although they meet the requirements of lubrication, their cooling properties are relatively poor, and the sedimentation of abrasive powder is poor. There are many bubbles during the processing, which affects the processing performance and precision; and because of the defects of the system itself, it is particularly easy to grow bacteria, so it is easy to stink and has a short life.

[0004] At present, in order to improve the cleaning performance, the grinding fluid usually has a relatively high flow rate and pressure. In addition, during the processing, the operator often directly contacts the grinding working fluid with his hands, which also requires the grinding fluid to have a small odor, a low pH value and low skin irritation. At present, the fully synthetic titanium alloy grinding fluid developed domestically still has shortcomings such as poor cleaning performance, inaccurate processing accuracy, large loss, irritation to the skin and eyes of operators, and easy health problems. Therefore, there is an urgent need for a new type of titanium alloy grinding fluid that can meet the lubrication performance, cleaning performance and cooling performance of titanium alloy parts at the same time. Summary of the invention

[0005] In view of the problems of poor cleaning and cooling performance of the titanium alloy grinding fluid involved in the above-mentioned prior art, the present invention will provide a fully synthetic titanium alloy grinding fluid and a preparation method and application thereof.

[0006] To achieve the above purpose, the following technical solutions are specifically included:

[0007] A fully synthetic titanium alloy grinding fluid comprises the following components in percentage by weight: 8-23% of an alkali reserve agent, 8-20% of an aqueous lubricant, 9-18% of a rust inhibitor, 2-4% of an organic alcohol, 0.5-1.5% of a metal corrosion inhibitor, 0-2% of a sedimentation agent, 0.05-0.1% of a defoaming agent, and 40-60% of water;

[0008] The aqueous lubricant comprises a first polyether, a second polyether and polyethylene glycol 400; the first polyether is a block copolymer of ethylene oxide (EO) and propylene oxide (PO) with a number average molecular weight of 3500; the second polyether is a block copolymer of ethylene oxide (EO) and propylene oxide (PO) with a number average molecular weight of 10000-20000.

[0009] The inventors have found that the fully synthetic titanium alloy grinding fluid of the present invention has excellent cooling performance, antioxidant ability and outstanding lubrication and wear resistance, can be used for a long time, can ensure processing accuracy and tool life; has good cleaning performance, can effectively prevent titanium alloy powder from clogging the grinding wheel; and the grinding fluid has good sedimentation, is conducive to processing, non-toxic, low odor, environmentally friendly and pollution-free, has a low pH value, and has no adverse effects on the skin. Among them, it is very difficult to use water-based polyether. If the molecular weight selected is not appropriate, the turbidity point will be low, the lubrication will be unstable, and the cutting fluid will be poor in stability, thereby affecting the service life; if it is not matched with high molecular weight polyether, the cooling and sedimentation properties of the system will be insufficient, and the surface of the titanium alloy, which has a particularly low heat transfer coefficient, will accumulate a large amount of heat during the processing, and the temperature will rise rapidly, and the high temperature will cause the surface of the titanium alloy to oxidize or discolor. In the present invention, the first polyether is a low molecular weight polyether, and the second polyether is a high molecular weight polyether. Through the combined use of the first polyether, the second polyether and polyethylene glycol 400, the grinding fluid system of the present invention meets the high requirements of titanium alloy processing and can effectively solve the two major problems of lubrication and cooling.

[0010] As a preferred embodiment of the present invention, the metal corrosion inhibitor includes 1,2,3-benzotriazole.

[0011] This corrosion inhibitor is water-soluble and is particularly suitable for use in fully synthetic systems. It can exert its excellent corrosion inhibition effect in a water-based environment. During the grinding process, it can quickly adsorb on the metal surface, covering it with a protective film to prevent oxidation and other problems on the titanium alloy surface.

[0012] As a preferred embodiment of the present invention, the organic alcohol includes at least one of ethylene glycol, diethylene glycol, n-propanol, isopropanol, propylene glycol, 1,3-propylene glycol, and glycerol.

[0013] As a preferred embodiment of the present invention, the sedimentation agent includes polydichloroethyl ether tetramethylethylenediamine.

[0014] During the grinding process, a large amount of metal powder appears, which requires the grinding fluid to have particularly good sedimentation and cleaning properties. It is most critical to select a suitable sedimentation agent. Common sedimentation agents are incompatible with polyethers, resulting in polyether precipitation, turbid appearance of the prepared grinding fluid, or weakened sedimentation after reacting with metal powders. The polydichloroethyl ether tetramethylethylenediamine selected in the present invention is used as a sedimentation agent, which has good compatibility with polyethers and can promote the rapid sedimentation of titanium powders, especially when used in combination with organic alcohols, which can further accelerate the infiltration of titanium alloy powders to achieve the effect of rapid sedimentation, and can enhance the cleaning effect of the grinding fluid, so that the powder quickly separates from the metal surface without affecting the grinding condition of the metal surface.

[0015] As a preferred embodiment of the present invention, the alkali reserve agent includes at least one of methyldiethanolamine, butyl-monoethanolamine, butyl-diethanolamine, octyl-diethanolamine, triethanolamine, diisopropanolamine, diglycolamine, and 2-amino-2-methyl-1-propanol.

[0016] As a preferred embodiment of the present invention, the mass ratio of the first polyether, the second polyether and polyethylene glycol 400 is first polyether: second polyether: polyethylene glycol 400 = (2.5-5): 1:2.

[0017] If the ratio of the first polyether, the second polyether and polyethylene glycol 400 is not appropriate, instability or excessive lubrication will occur, resulting in excessive smoothness of the ground titanium alloy, affecting surface treatment and thus affecting processing accuracy. Under the above ratio, the fully synthetic grinding fluid of the present invention has the advantages of good stability, appropriate lubricity, good cooling and sedimentation properties.

[0018] As a preferred embodiment of the present invention, the rust inhibitor includes at least one of monobasic acylamino acid, organic carboxylate, isononanoic acid, sebacic acid, dimer acid and trimer acid.

[0019] The present invention optimizes the lubricity, rust prevention and cooling properties of the invention by compounding the rust inhibitor and the water-based lubricant, so as to meet the requirements of using the least lubricant and rust inhibitor but having excellent lubricity, rust prevention and cooling capabilities. At the same time, the present invention can also use a variety of rust inhibitors in combination, so that the fully synthetic system has a better protective effect on the corrosion of various non-ferrous metals such as aluminum alloys and titanium alloys.

[0020] As a preferred embodiment of the present invention, the defoaming agent includes at least one of silicone and polyol.

[0021] As a preferred embodiment of the present invention, the pH value of the fully synthetic titanium alloy grinding fluid is 7.3-8.3.

[0022] The present invention also provides a method for preparing a fully synthetic titanium alloy grinding fluid, comprising the following steps:

[0023] Water, a rust inhibitor and an alkali reserve agent are mixed and stirred until the solid is dissolved; then an aqueous lubricant, a metal corrosion inhibitor, a sedimentation agent and a defoaming agent are added and stirred evenly to obtain the fully synthetic titanium alloy grinding fluid.

[0024] As a preferred embodiment of the present invention, the dissolution temperature is 40-50° C., and the dissolution time is 40-100 minutes.

[0025] At the above mentioned temperatures, the solids dissolve better.

[0026] The application of the above-mentioned fully synthetic titanium alloy grinding fluid of the present invention in the field of titanium alloy processing, such as in the processing of titanium alloy mobile phone shells, has good operability, environmental protection, high processing accuracy, health and safety for operators, long service life, low toxicity, low pollution, and excellent lubricity, sedimentation and cooling properties.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The fully synthetic titanium alloy grinding fluid of the present invention has excellent anti-wear, lubrication, sedimentation and cooling properties, is suitable for rough grinding and fine grinding, and ensures the processing accuracy and service life of the grinding wheel.

[0029] (2) The components of the titanium alloy grinding fluid described in the present invention are mostly antibacterial components, which can inhibit the production of bacteria without adding bactericides, so that it has outstanding anti-corruption ability, can be recycled for a long time, and has a long service life.

[0030] (3) The preparation method of the titanium alloy grinding fluid of the present invention is simple, low in cost, superior in performance, and has good market prospects. DETAILED DESCRIPTION

[0031] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below through specific embodiments.

[0032] Source information of raw materials for the following examples and comparative examples:

[0033] The aqueous lubricant used in Examples 1-3, 4-5 and 6 is a mixture of a low molecular weight polyether with a number average molecular weight of 3500, a polyether with a number average molecular weight of 20000 and polyethylene glycol 400, and the mass ratios thereof are 2.5:1:2, 5:1:2 and 4:1:2 respectively;

[0034] The rust preventive of Example 1 is formed by mixing sebacic acid, tribasic acid and dimer acid in a mass ratio of 1:1:2; the rust preventive of Example 2 is formed by mixing isononanoic acid, trimer acid and dimer acid in a mass ratio of 1:1:2; the rust preventive of Example 3 is formed by mixing isononanoic acid, organic carboxylate and dimer acid in a mass ratio of 1:1:2; the rust preventive of Example 4 is formed by mixing sebacic acid, tribasic acid and dimer acid in a mass ratio of 1:1:2; the rust preventive of Example 5 is formed by mixing tribasic acid, sebacic acid and dimer acid in a mass ratio of 1:1:2; the rust preventive of Example 6 is formed by mixing trimer acid, sebacic acid and tribasic acid in a mass ratio of 1:1:2;

[0035] Unless otherwise specified, the raw materials involved in the following embodiments and comparative examples, such as the low molecular weight polyether with a number average molecular weight of 3500, the polyether with a number average molecular weight of 20000, polyethylene glycol 400, sebacic acid, tribasic acid, dimer acid, trimer acid, silicone defoaming agent, polyol defoaming agent, etc., are all of the same type, which is commonly used in the industry and can be purchased on the market.

[0036] Example 1

[0037] The present embodiment is a fully synthetic titanium alloy grinding fluid, which includes the following components in mass percentage: 15% aqueous lubricant, 14% alkali reserve agent (a mixture of 10% triethanolamine, 2% diisopropanolamine and 2% methyl-diethanolamine), 12% rust inhibitor (a mixture of sebacic acid, tribasic acid and dimer acid in a mass ratio of 1:1:2), 2% diethylene glycol, 1,2,3-benzotriazole, 2% polydichloroethyl ether tetramethylethylenediamine, 0.05% silicone defoamer and the remainder water.

[0038] A method for preparing a fully synthetic titanium alloy grinding fluid comprises the following steps:

[0039] Water, rust inhibitor and alkali reserve agent are stirred at 40-50° C. for 50-60 minutes until the solid is dissolved and mixed evenly; then an aqueous lubricant, a metal corrosion inhibitor, a precipitant and a defoaming agent are added in sequence, and stirred for another 30-50 minutes until transparent, thereby obtaining the fully synthetic titanium alloy grinding fluid.

[0040] Example 2

[0041] The present embodiment is a fully synthetic titanium alloy grinding fluid, which includes the following components by mass percentage: 20% aqueous lubricant, 11% alkali reserve agent (a mixture of 8% triethanolamine, 2% diglycolamine and 1% butyl-diethanolamine), rust inhibitor (a mixture of isononanoic acid, trimer acid and dimer acid in a mass ratio of 1:1:2)

[0042] 9%, isopropyl alcohol is 2%, metal corrosion inhibitor 1,2,3-benzotriazole is 1.5%, polydichloroethyl ether tetramethylethylenediamine is 1%, polyol defoamer is 0.05% and the balance is water.

[0043] The preparation method of the fully synthetic titanium alloy grinding fluid in this embodiment is the same as that in Example 1.

[0044] Example 3

[0045] The present embodiment provides a fully synthetic titanium alloy grinding fluid, which includes the following components in mass percentage: 11% aqueous lubricant, 20% alkali reserve agent (a mixture of 16% triethanolamine, 2% diglycolamine and 2% diisopropanolamine), 15% rust inhibitor (a mixture of isononanoic acid, organic carboxylate and dimer acid in a mass ratio of 1:1:2), 4% 1,3-propylene glycol, 1% metal corrosion inhibitor 1,2,3-benzotriazole, 2% polydichloroethyl ether tetramethylethylenediamine, 0.1% silicone defoaming agent and the balance water.

[0046] The preparation method of the fully synthetic titanium alloy grinding fluid in this embodiment is the same as that in Example 1.

[0047] Example 4

[0048] The present embodiment provides a fully synthetic titanium alloy grinding fluid, which includes the following components in mass percentage: 11% aqueous lubricant, 20% alkali reserve agent (a mixture of 16% triethanolamine, 2% diglycolamine and 2% octyl-diethylenepropanolamine), 15% rust inhibitor (a mixture of sebacic acid, tribasic acid and dimer acid in a mass ratio of 1:1:2), 2% diethylene glycol, 1% metal corrosion inhibitor 1,2,3-benzotriazole, 1% polydichloroethyl ether tetramethylethylenediamine, 0.05% silicone defoamer and the remainder water.

[0049] The preparation method of the fully synthetic titanium alloy grinding fluid in this embodiment is the same as that in Example 1.

[0050] Example 5

[0051] The present embodiment is a fully synthetic titanium alloy grinding fluid, which includes the following components in mass percentage: 15% aqueous lubricant, 13% alkali reserve agent (a mixture of 10% triethanolamine, 1% butyl monoethanolamine and 2% diglycolamine), 15% rust inhibitor (a mixture of tribasic acid, sebacic acid and dimer acid in a mass ratio of 1:1:2), 4% ethylene glycol, 1% metal corrosion inhibitor 1,2,3-benzotriazole, 1% polydichloroethyl ether tetramethylethylenediamine, 0.1% polyol defoaming agent and the balance water.

[0052] The preparation method of the fully synthetic titanium alloy grinding fluid in this embodiment is the same as that in Example 1.

[0053] Example 6

[0054] The present embodiment provides a fully synthetic titanium alloy grinding fluid, which includes the following components in mass percentage: 18% aqueous lubricant, 13% alkali reserve agent (a mixture of 10% triethanolamine, 1% diisopropanolamine and 2% diglycolamine), 15% rust inhibitor (a mixture of trimer acid, sebacic acid and tribasic acid in a mass ratio of 1:1:2), 3% propylene glycol, 1% metal corrosion inhibitor 1,2,3-benzotriazole, 1% polydichloroethyl ether tetramethylethylenediamine, 0.1% silicone defoamer and the remainder water.

[0055] Example 7

[0056] Compared with Example 1, the difference of this embodiment is that the content of the water-based lubricant in this embodiment is 8%.

[0057] Example 8

[0058] Compared with Example 1, the difference of this embodiment is that the content of the water-based lubricant in this embodiment is 15%.

[0059] Example 9

[0060] Compared with Example 1, the difference of this embodiment is that the content of the water-based lubricant in this embodiment is 23%.

[0061] Example 10

[0062] Compared with Example 1, the difference of this embodiment is that the mass ratios of the low molecular weight polyether with a number average molecular weight of 3500, the polyether with a number average molecular weight of 20000 and polyethylene glycol 400 in the aqueous lubricant of this embodiment are 5:1:2 respectively.

[0063] Embodiment 11

[0064] Compared with Example 1, the difference of this embodiment is that the mass ratios of the low molecular weight polyether with a number average molecular weight of 3500, the polyether with a number average molecular weight of 20000 and polyethylene glycol 400 in the aqueous lubricant of this embodiment are 4:1:2 respectively.

[0065] Example 12

[0066] Compared with Example 1, the difference of this example is that the number average molecular weight of the high molecular weight polyether in the aqueous lubricant of this example is 15,000.

[0067] Example 13

[0068] Compared with Example 1, the difference of this embodiment is that the number average molecular weight of the high molecular weight polyether in the aqueous lubricant of this embodiment is 10,000.

[0069] The preparation method of the fully synthetic titanium alloy grinding fluid in this embodiment is the same as that in Example 1.

[0070] Comparative Example 1

[0071] The comparative example is a semi-synthetic titanium alloy grinding fluid, which comprises the following components in percentage by mass: 15% base oil, 15% emulsifier, 15% alkali reserve agent (a mixture of 12% triethanolamine, 1% alkylamine and 2% diglycolamine), 10% synthetic fat, 15% rust inhibitor (a mixture of trimer acid and tribasic acid in a mass ratio of 1:2), 2% phosphate extreme pressure agent, 1% metal corrosion inhibitor (1,2,3-benzotriazole), 0.1% silicone defoaming agent and the balance water.

[0072] Comparative Example 2

[0073] Compared with Example 1, the difference of this comparative example is that the aqueous lubricant in the fully synthetic titanium alloy grinding fluid of this comparative example is 15% of a single component low molecular weight polyether with a number average molecular weight of 3500.

[0074] Comparative Example 3

[0075] Compared with Example 1, the difference of this comparative example is that the aqueous lubricant in the fully synthetic titanium alloy grinding fluid of this comparative example is 15% of a single component high molecular weight polyether with a number average molecular weight of 20,000.

[0076] Comparative Example 4

[0077] Compared with Example 1, the difference of this comparative example is that the aqueous lubricant in the fully synthetic titanium alloy grinding fluid of this comparative example is 15% of a single component of polyethylene glycol 400.

[0078] Comparative Example 5

[0079] Compared with Example 1, the difference of this comparative example is that the aqueous lubricant in the fully synthetic titanium alloy grinding fluid of this comparative example is 15% of a two-component low molecular weight polyether with a number-average molecular weight of 3500 and polyethylene glycol 400, and the mass ratio thereof is 3.5:2.

[0080] Comparative Example 6

[0081] Compared with Example 1, the difference of this comparative example is that the molecular weight of the polyether with a low molecular weight of 2000 and the molecular weight of the high molecular weight polyether in the fully synthetic titanium alloy grinding fluid of this comparative example is 30000.

[0082] Comparative Example 7

[0083] Compared with Example 1, the difference of this comparative example is that the mass ratio of the aqueous lubricant low molecular weight polyether with a number average molecular weight of 3500, the polyether with a number average molecular weight of 20000 and polyethylene glycol 400 in the fully synthetic titanium alloy grinding fluid of this comparative example is 7:1:2.

[0084] Comparative Example 8

[0085] Compared with Example 1, the difference of this comparative example is that the mass ratio of the aqueous lubricant low molecular weight polyether with a number average molecular weight of 3500, the polyether with a number average molecular weight of 20000 and polyethylene glycol 400 in the fully synthetic titanium alloy grinding fluid of this comparative example is 1:1:2.

[0086] Table 1 Performance test results of fully synthetic titanium alloy grinding fluids of Examples 1-8

[0087]

[0088]

[0089] Table 2 Performance test results of fully synthetic titanium alloy grinding fluids of Examples 9-13 and Comparative Examples 1-2

[0090]

[0091]

[0092] Table 3 Performance test results of the fully synthetic titanium alloy grinding fluid of Comparative Examples 3-8

[0093]

[0094]

[0095] Evaluation standard 1: When polyether precipitation, stratification, turbid grinding fluid, or excessive and fine foam affects the grinding conditions during use, it is necessary to stop using the grinding fluid and replace the fluid. The time for changing the fluid is the service life.

[0096] Evaluation Criteria 2: If metal powder blocks the grinding wheel during the use of the grinding fluid, or is easily suspended during grinding, causing secondary scratches on the metal surface during grinding, it is considered to have poor sedimentation properties. Otherwise, it is considered to have good sedimentation properties.

[0097] Evaluation standard 3: When the cooling performance is good, the surface temperature of the workpiece is normal, and there is no local high temperature oxidation on the workpiece surface; when the cooling performance of the grinding fluid is poor, the temperature of the workpiece surface cannot be taken away by the grinding fluid in time, and local high temperature will appear on the workpiece surface, resulting in local oxidation of the workpiece surface. When visible discoloration appears on the surface, the workpiece is unqualified. The ratio of the number of workpieces with discoloration to the total number of processed pieces is the discoloration unqualified rate. When the discoloration unqualified rate is greater than 1%, it is judged that the grinding fluid has poor cooling performance.

[0098] It can be seen from Example 1 and Comparative Examples 2-4 that in the present invention, the first polyether is a low molecular weight polyether, and the second polyether is a high molecular weight polyether. Through the combined use of the first polyether, the second polyether and polyethylene glycol 400, the grinding fluid system of the present invention meets the high requirements of titanium alloy processing and can effectively solve the two major problems of lubrication and cooling.

[0099] It can be seen from Example 1 and Comparative Example 5 that if a high molecular weight polyether is not used, the cooling and sedimentation properties of the system will be insufficient, resulting in a large amount of heat accumulation on the surface of the titanium alloy, which has a particularly low heat transfer coefficient, and rapid temperature rise during processing. The high temperature causes problems such as oxidation or discoloration on the surface of the titanium alloy.

[0100] Compared with Example 1 and Comparative Example 6, if the molecular weight is not appropriate, the cloud point will be low, the lubrication will be unstable, the cooling will be weakened, and the cutting fluid will be poor in stability, thereby affecting the service life. It can be seen from Example 1 and Comparative Examples 7-8 that if the ratio of the first polyether, the second polyether and polyethylene glycol 400 is not appropriate, it will be unstable, the lubrication will be too high, and the polish of the ground titanium alloy will be too high, which will affect the surface treatment and thus affect the processing accuracy.

[0101] By comparing the above embodiments and comparative examples, it can be seen that the high-efficiency and environmentally friendly fully synthetic titanium alloy grinding fluid of the present invention has more stable performance, more excellent anti-wear performance, more effective cooling performance, more superior sedimentation performance, and more superior antibacterial performance, and finally achieves a superior performance that can be used in the grinding of titanium alloys with high hardness, high strength but extremely low heat transfer coefficient.

[0102] 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 fully synthetic titanium alloy grinding fluid, characterized in that: It includes the following components in percentage by mass: alkali reserve agent 8-23%, water-based lubricant 8-20%, rust inhibitor 9-18%, organic alcohol 2-4%, metal corrosion inhibitor 0.5-1.5%, sedimentation agent 0-2%, defoamer 0.05-0.1%, water 40-60%; The aqueous lubricant comprises a first polyether, a second polyether and polyethylene glycol 400; the first polyether is a block copolymer of ethylene oxide and propylene oxide with a number average molecular weight of 3500; the second polyether is a block copolymer of ethylene oxide and propylene oxide with a number average molecular weight of 10000-20000; The mass ratio of the first polyether, the second polyether and polyethylene glycol 400 is the first polyether: the second polyether: polyethylene glycol 400 = (2.5-5): 1: 2; The sedimentation agent includes polydichloroethyl ether tetramethylethylenediamine.

2. The fully synthetic titanium alloy grinding fluid according to claim 1, characterized in that: The metal corrosion inhibitor includes 1,2,3-benzotriazole.

3. The fully synthetic titanium alloy grinding fluid according to claim 1, characterized in that: The alkali reserve agent includes at least one of methyldiethanolamine, butyl-monoethanolamine, butyl-diethanolamine, octyl-diethanolamine, triethanolamine, diisopropanolamine, diglycolamine, and 2-amino-2-methyl-1-propanol.

4. The fully synthetic titanium alloy grinding fluid according to claim 1, characterized in that: The rust inhibitor includes at least one of monobasic acylamino acid, organic carboxylate, isononanoic acid, sebacic acid, dimer acid and trimer acid.

5. The fully synthetic titanium alloy grinding fluid according to claim 1, characterized in that: The organic alcohol includes at least one of ethylene glycol, diethylene glycol, n-propanol, isopropanol, propylene glycol, 1,3-propylene glycol, and glycerol.

6. The fully synthetic titanium alloy grinding fluid according to claim 1, characterized in that: The defoaming agent includes at least one of silicone and polyol.

7. A method for preparing the fully synthetic titanium alloy grinding fluid according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: mixing water, a rust preventive and an alkali reserve agent, and stirring until the solid is dissolved; then adding an aqueous lubricant, a metal corrosion inhibitor, a sedimentation agent and a defoaming agent, and stirring evenly to obtain the fully synthetic titanium alloy grinding fluid.

8. Use of the fully synthetic titanium alloy grinding fluid according to any one of claims 1 to 6 in the field of titanium alloy processing.

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