CN116200222A

CN116200222A - Heavy-load water-based lubricating cutting fluid containing ionic liquid and preparation method thereof

Info

Publication number: CN116200222A
Application number: CN202211697711.XA
Authority: CN
Inventors: 张霞; 石永佳; 韩鹏; 孙立彬; 刘维民; 王晓波
Original assignee: Weifang Aorunde New Material Technology Co ltd; Yantai Advanced Materials And Green Manufacturing Shandong Laboratory; Lanzhou Institute of Chemical Physics LICP of CAS
Current assignee: Weifang Aorunde New Material Technology Co ltd; Yantai Advanced Materials And Green Manufacturing Shandong Laboratory; Lanzhou Institute of Chemical Physics LICP of CAS
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-06-02

Abstract

The invention belongs to the technical field of metal working fluids, and particularly relates to an ionic liquid-containing heavy-load water-based lubricating cutting fluid and a preparation method thereof. The heavy-load water-based lubricating cutting fluid containing the ionic liquid is prepared from the following raw materials in parts by mass: 5 to 7 parts of organic acid, 1 to 1.5 parts of organic alcohol amine, 10 to 15 parts of synthetic ester and 1.7 to 2 parts of dialkyl dithioZinc phosphate, 0.25-0.75 part of benzotriazole, 0.25-0.75 part of defoamer, 0.5-1.5 part of triethanolamine borate, 12-17.6 parts of polyether, 2-4 parts of petroleum sodium sulfonate, 2-3 parts of tween, 19-24 parts of span, 1.5-15 parts of imidazole ionic liquid and 5-15 parts of deionized water. The invention realizes the improvement of friction performance under high load by utilizing imidazole ionic liquid, which is expressed as maximum non-biting loadP _B Compared with common commercial lubricating cutting fluid, the tapping torque value is obviously reduced, and the tapping torque value has excellent lubricating performance through tribological performance evaluation.

Description

Heavy-load water-based lubricating cutting fluid containing ionic liquid and preparation method thereof

Technical Field

The invention belongs to the technical field of metal working fluids, and particularly relates to an ionic liquid-containing heavy-load water-based lubricating cutting fluid and a preparation method thereof.

Background

The metal cutting fluid has the functions of cooling, lubricating, rust prevention, cleaning and the like, plays a very important role in the metal cutting and grinding process, and the proper metal cutting fluid is selected to prolong the service life of cutting tools, grinding wheels and other cutting grinding tools, so that the production efficiency and the product quality are improved. Along with the increasingly severe requirements on workpiece precision in the industrial production process, the comprehensive performance of the metal cutting fluid must be further improved in order to further improve the cutting efficiency and working precision and reduce the roughness of the metal surface, which is also a problem to be solved in the research process of the metal cutting fluid.

The ionic liquid is also called room temperature ionic liquid and room temperature molten salt, and is a salt which consists of organic cations and inorganic anions and is in a liquid state below 100 ℃. Because of the diversity of organic cations and inorganic anions, ionic liquids with specific functions can be designed through different ratio combinations and are widely applied to various fields. The ionic liquid is used as an additive of the metal cutting fluid, and can effectively improve the extreme pressure, abrasion resistance and lubricating effect of the water-based cutting fluid, thereby improving the thermal stability and chemical stability of the water-based cutting fluid.

Chinese patent publication No. CN103555392A discloses a microemulsified metal cutting fluid containing ionic liquid, a preparation method and application thereof, wherein an anti-rust agent is poured into water to form a water system, an extreme pressure additive, a defoaming agent and a bactericide are sequentially added into base oil to form an oil system, the water system and the oil system are stirred and mixed, a surfactant and the ionic liquid are added, and pH is regulated to obtain the microemulsified metal cutting fluid with good performance. Although the metal cutting fluid in this patent has good stability, lubricity and other characteristics, P is the anti-friction property _B The value (maximum bite no load) is only 98kg, which remains to be improved. Therefore, developing a heavy-load metal cutting fluid containing ionic liquid, which is suitable for cutting processing of high-precision and high-requirement metal workpieces, has important significance.

Based on the above, the invention improves the extreme pressure lubricity of the cutting fluid and the interaction among the components by adjusting the component proportion of the cutting fluid so as to improve the friction performance.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention aims to provide the heavy-load water-based lubricating cutting fluid containing the ionic liquid, which has high bearing capacity and good lubricating performance, and the heavy-load water-based lubricating cutting fluid has excellent tribological performance through optimizing and adjusting raw materials and a preparation process.

The invention also provides a preparation method of the heavy-load water-based lubricating cutting fluid containing the ionic liquid.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

the heavy-load water-based lubricating cutting fluid containing the ionic liquid is prepared from the following raw materials in parts by weight: 5 to 7 parts of organic acid, 1 to 1.5 parts of organic alcohol amine, 10 to 15 parts of synthetic ester, 1.7 to 2 parts of Zinc Dialkyl Dithiophosphate (ZDDP), 0.25 to 0.75 part of benzotriazole, 0.25 to 0.75 part of defoamer, 0.5 to 1.5 parts of triethanolamine borate, 12 to 17.6 parts of polyether, 2 to 4 parts of sodium petroleum sulfonate, 2 to 3 parts of tween, 19 to 24 parts of span, 1.5 to 15 parts of imidazole ionic liquid and 5 to 15 parts of deionized water.

Specifically, the synthetic ester is one or more of pentaerythritol oleate, trimethylolpropane cocoate, diisooctyl sebacate, neopentyl glycol oleate and isooctyl stearate; preferably pentaerythritol oleate and/or trimethylolpropane oleate; further preferably, when the synthetic ester is pentaerythritol oleate and trimethylolpropane oleate, the mass ratio of the pentaerythritol oleate to the trimethylolpropane oleate is 1: (1-10).

Specifically, the organic acid is one or more of oleic acid, caprylic acid, isooctanoic acid, capric acid, sebacic acid and undecanedioic acid; oleic acid is preferred.

Specifically, the polyether is one or more of ethylene glycol monobutyl ether, diethylene glycol butyl ether and dipropylene glycol butyl ether; preferably diethylene glycol butyl ether; the polyether plays roles of emulsification, dispersion and lubrication in the cutting fluid.

Specifically, the defoaming agent is one or two of modified silicone oil and natural grease; preferably modified silicone oil, with the brand of Union celebration MS575.

Specifically, the span is one or more of span 20, span 40, span 60 and span 80; preferably span 80; span has strong emulsifying, dispersing and lubricating properties, is also a good stabilizer and defoamer, and can improve the stability of cutting fluid.

Specifically, the tween is one or more of tween 20, tween 40, tween 60 and tween 80; preferably tween 60.

Specifically, the organic alcohol amine is one or more of triisopropanolamine, diethanolamine and triethanolamine; preferably triethanolamine.

Specifically, the imidazole ionic liquid is one or more of diethyl 1-ethyl-3-methylimidazole phosphate, diethyl 1-vinyl-3-ethylimidazole phosphate and 1-butyl-3-methylimidazole hexafluorophosphate; preferably 1-ethyl-3-methylimidazole diethyl phosphate.

The oleic acid and the organic alcohol amine in the heavy-load water-based lubricating cutting fluid containing the ionic liquid have better antirust lubricating effect and antibacterial stabilizing effect, and can effectively prevent corrosion and deterioration; benzotriazole is an excellent metal antirust agent and corrosion inhibitor, and can improve the antirust performance of the cutting fluid; zinc dialkyldithiophosphate (ZDDP) has very excellent extreme pressure lubricating performance and plays a role in lubrication.

In the heavy-load water-based lubricating cutting fluid containing the ionic liquid, a nonionic surfactant diethylene glycol butyl ether (polyether), span, tween and an anionic surfactant petroleum sodium sulfonate are compounded to play a good role in emulsion stability, so that each component is uniformly and stably dispersed in water, sedimentation, layering, agglomeration, flocculation or aging of active ingredients are prevented, and the storage stability of the microemulsified cutting fluid is improved; in addition, sodium petroleum sulfonate also has very excellent rust-preventing effect.

Specifically, the pH value of the cutting fluid is 8.0 to 10.0, preferably 8.0 to 9.0.

Furthermore, the invention also provides a preparation method of the heavy-load water-based lubricating cutting fluid containing the ionic liquid, which comprises the following steps:

1) Mixing organic acid and organic alcohol amine, heating to 70-80deg.C, and stirring for 20-30min to obtain emulsion A;

2) Mixing the synthetic ester, ZDDP (zinc dialkyl dithiophosphate), benzotriazole and a defoaming agent, uniformly stirring, and then heating to 40-50 ℃ to obtain a solution B;

3) Mixing deionized water and triethanolamine borate, heating to 45-55deg.C, and stirring for 20-30min to obtain solution C;

4) Adding the solution C into the solution B, keeping the temperature of the solution at 40-50 ℃, adding polyether, uniformly stirring, adding the solution C into the emulsion A, uniformly mixing at 40-50 ℃, sequentially adding sodium petroleum sulfonate, tween and span, and uniformly stirring for 20-30min to obtain a cutting fluid mother solution;

and adding imidazole ionic liquid into the cutting fluid mother liquor, and then adding water into the cutting fluid mother liquor to dilute to obtain white emulsion, namely the water-based lubrication cutting fluid.

Preferably, the mass ratio of organic acid to organic alcohol amine in step 1) is (3-20): 1, preferably 4.8:1.

Preferably, the mass ratio of synthetic ester, ZDDP, benzotriazole, defoamer in step 2) is (1-10): (0.925-9.25): (0.25-2.5): (0.25-2.5), preferably 4:3.7:1:1.

Preferably, in the step 3), the mass ratio of deionized water to triethanolamine borate is (5-20): 1, preferably 10:1.

Preferably, in the dilution in step 4), the stock solution of the cutting fluid is diluted with water to a concentration of 5 to 10wt% as the working fluid, preferably 5wt% or 10wt%.

Preferably, the imidazole-based ionic liquid in step 4) is added in an amount of 3-18wt%, preferably 3wt%, 5wt%, 7wt%, 10wt% or 15wt% of the cutting fluid mother liquor.

Specifically, the organic acid in the step 1) is one or more of oleic acid, caprylic acid, isooctanoic acid, capric acid, sebacic acid and undecanoic dibasic acid; oleic acid is preferred.

Specifically, the organic alcohol amine in the step 1) is one or more of triisopropanolamine, diethanolamine and triethanolamine; preferably triethanolamine.

Specifically, the synthetic ester in the step 2) is one or more of pentaerythritol oleate, trimethylolpropane cocoate, diisooctyl sebacate, neopentyl glycol oleate and isooctyl stearate; pentaerythritol oleate and trimethylolpropane oleate are preferred; the mass ratio of pentaerythritol oleate to trimethylolpropane oleate is 1: (1-10).

Specifically, the defoamer in the step 2) is one or two of modified silicone oil and natural grease; preferably modified silicone oil, with the brand of Union celebration MS575.

Specifically, the polyether in the step 4) is one or more of ethylene glycol monobutyl ether, diethylene glycol butyl ether and dipropylene glycol butyl ether; diethylene glycol butyl ether is preferred.

Specifically, the tween in the step 4) is one or more of tween 20, tween 40, tween 60 and tween 80; preferably tween 60.

Specifically, in step 4), the span is one or more of span 20, span 40, span 60 and span 80; preferably span 80; span has strong emulsifying, dispersing and lubricating properties, is also a good stabilizer and defoamer, and can improve the stability of cutting fluid.

Furthermore, the invention also provides application of the heavy-load water-based lubricating cutting fluid containing the ionic liquid in the metal cutting or grinding process.

Specifically, the cutting object is one or more of aluminum alloy, steel, magnesium aluminum alloy and zinc aluminum alloy; aluminum alloys are preferred.

Compared with the prior art, the invention has the advantages that:

1. the invention realizes the improvement of friction performance under high load by utilizing imidazole ionic liquid, which is expressed as maximum seizure-free load P _B The value can reach 1432N, and the lubricating performance is excellent through tribological property evaluation, and the friction coefficient is lower than 0.1.

2. Compared with common commercial lubricating cutting fluid, the tapping torque value of the lubricating cutting fluid is obviously reduced, which proves that the comprehensive performance of the lubricating cutting fluid is obviously improved.

3. Compared with the traditional lubrication cutting fluid, the preparation method is simple, lubrication of the steel-steel contact surface under the long-time high-load condition can be realized in the lower friction process, less heat is generated, the energy consumption is reduced, and meanwhile, the production safety is ensured.

4. The lubricating cutting fluid product prepared by the invention also has excellent rust resistance and corrosion resistance, the rust resistance and corrosion resistance reach A level, and the comprehensive performance is excellent.

The preparation method disclosed by the invention is simple to operate, low in cost, free from expensive experimental instruments and equipment, easy to realize large-scale batch production and has important application potential.

Drawings

FIG. 1 shows the lubricating cutting fluids prepared in examples 1, 3, 4, 6-8, 10 of the present invention, and the maximum seizure-free load P of comparative examples 1-3 _B A value test result;

FIG. 2 is a tapping torque diagram of examples 1, 4, 6-8, 10, and comparative examples 1-3 according to the present invention;

FIG. 3 is a graph showing the friction coefficient curves of examples 1, 3, 4, 6-8, 10, and comparative examples 2 and 3 according to the present invention;

FIG. 4 is a graph showing the friction coefficient of the lubricating cutting fluid prepared in example 2, example 5, example 9 according to the present invention;

in fig. 5, from left to right, the optical photographs of the stock solution of the cutting fluid prepared in example 1, the commercially available cutting fluid of comparative example 1, frank (AN 81), the commercially available cutting fluid of comparative example 2, los (BRAR 208), and the commercially available fos 600 are shown in order;

FIG. 6 shows the results of the plaque diameter test for the lubricating cutting fluids prepared in examples 1-10 of the present invention.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Comparative example 1

Comparative example 1 was a commercially available cutting fluid, fulanke (AN 81), which was diluted with water to a concentration of 5wt% for performance testing.

Comparative example 2

Comparative example 2 was a commercial cutting fluid, rockwell (BRAR 208), which was diluted with water to a concentration of 5wt% for performance testing.

Comparative example 3

Comparative example 3 was commercial cutting fluid fos 600, which was diluted with water to a concentration of 5wt% for performance testing.

Example 1

Embodiment 1 provides an ionic liquid-containing heavy-load water-based lubricating cutting fluid, which comprises a cutting fluid mother solution, wherein the cutting fluid mother solution is prepared by the following steps:

1) 6g of organic acid (oleic acid) and 1.25g of organic alcohol amine (triethanolamine) are added into a flask, the temperature is raised to 75 ℃, and the mixture is stirred for 30min to obtain emulsion A;

2) 6g of synthetic ester (pentaerythritol oleate), 6g of synthetic ester (trimethylolpropane oleate), 1.85g of ZDDP (zinc dialkyl dithiophosphate), 0.5g of benzotriazole and 0.5g of defoamer (modified silicone oil, brand is Union Qingxin MS 575) are sequentially added into another flask, in the adding process, one raw material is added each time, after being uniformly stirred, the next raw material is added, and then the temperature is raised to 45 ℃ to obtain a solution B;

3) Taking a flask again, adding 10g of deionized water and 1g of triethanolamine borate, heating to 50 ℃, and stirring for 30min to obtain a solution C;

4) Pouring the solution C into the solution B, keeping the temperature at 45 ℃, adding 14.8g of polyether (diethylene glycol butyl ether), uniformly stirring, pouring the mixture into the emulsion A, uniformly stirring at 45 ℃, respectively adding 3g of petroleum sodium sulfonate, 2.5g of tween 60 and 21.4g of span 80, and continuously stirring for 30 minutes to obtain a light yellow semitransparent uniform solution, namely a cutting fluid mother solution.

In fig. 5, from left to right, the optical photographs of the stock solution of the cutting fluid prepared in example 1, the commercially available cutting fluid of comparative example 1, frank (AN 81), the commercially available cutting fluid of comparative example 2, los (BRAR 208), and the commercially available fos 600 are shown in order; as can be seen from the figure, the cutting fluid mother liquor, frank (AN 81), ross (BRAR 208), and fos 600 of example 1 are all light yellow semitransparent solutions.

When the heavy-load water-based lubricating cutting fluid containing the ionic liquid is used, 2g of cutting fluid mother liquor is taken, and then water is added for dilution until the concentration is 5wt%, so that white emulsion is obtained, and the working fluid of the heavy-load water-based lubricating cutting fluid containing the ionic liquid is obtained.

Cutting fluid performance test prepared in example 1:

1. the tribological properties of the prepared lubricating cutting fluid were tested using a four-ball friction tester (MS-10A).

The steel ball used in the test is

GCr15 bearing steel ball. The test conditions are room temperature, load 510N, friction Coefficient (COF) at 30min of long mill under 1450r/min, and maximum seizure-free load (P _B Values).

The surface of the steel ball was tested for plaque diameter using an XDS-0745D optical microscope and a MicroXAM 3D non-contact surface tester.

2. Tapping torque values during cutting or deformation in metal working are tested using a tapping torque test system.

The test piece was a 6082# aluminum alloy nut with an internal diameter of 3.7mm, and a high precision plated Huang Tai extrusion tap of model ttt_m4f-TINT.

Test results:

1. as a result of the tribological property test, as shown in FIG. 1, it can be seen that the maximum seizure-free load P of the lubricating cutting fluid of example 1 at a concentration of 5 wt.% _B The value can reach 1118N, which is far more than the maximum non-biting load P of the commercial Fulank (AN 81) of the comparative example 1 _B Value 784N, comparative example 2 commercial Rockwell (BRAR 208) maximum no-bite load P _B Value 588N, comparative example 3 commercial Fors 600 maximum no bite load P _B The extreme pressure performance was more excellent at a value of 412N.

In addition, as shown in fig. 3, the friction coefficient of the lubricating cutting fluid prepared in example 1 was 0.086, which is significantly lower than the friction coefficient of fos 600 commercially available in comparative example 3, and was not much different from the friction coefficient of los (BRAR 208) commercially available in comparative example 2, indicating that the lubricating performance of example 1 was good.

Meanwhile, as shown in fig. 6, the lubricating cutting fluid prepared in example 1 has a plaque diameter (WSD) of 0.750mm, a smaller plaque diameter and a smoother and smoother surface, and is suitable for use as a metal cutting fluid.

2. As shown in fig. 2, the tapping torque value test result shows that the tapping torque value of the lubricating cutting fluid prepared in example 1 is obviously lower than that of the cutting fluid of frank (AN 81) sold in comparative example 1, the los (BRAR 208) sold in comparative example 2 and the fos 600 sold in comparative example 3, and the comprehensive properties of extreme pressure, lubrication and the like of the lubricating cutting fluid prepared in example 1 are more excellent.

Example 2

Example 2 provides an ionic liquid-containing heavy-load water-based lubricating cutting fluid, and the preparation method of the cutting lubricating fluid is the same as that of example 1. Example 2 differs from example 1 in that the cutting fluid of example 2 was subjected to tribological performance testing by lowering the load 510N to 392N under the test conditions, while the other conditions were unchanged.

As shown in fig. 4, it can be seen that the friction coefficient in the test result of example 2 decreases to 0.082 with the decrease of the bearing capacity, which indicates that the lubricating property of the lubricating cutting fluid is improved to some extent.

Further, as shown in FIG. 6, the plaque diameter in the test results of example 2 decreased with decreasing load to 0.571mm, and the surface was smooth and flat, which was suitable for use as a metal cutting fluid.

Example 3

Embodiment 3 provides an ionic liquid-containing heavy-load water-based lubricating cutting fluid, which comprises a cutting fluid mother solution, wherein the preparation method of the cutting fluid mother solution is the same as that of embodiment 1.

When the heavy-load water-based lubricating cutting fluid containing the ionic liquid is used, 2g of cutting fluid mother liquor is taken, 3wt% of imidazole ionic liquid (1-ethyl-3-methylimidazole diethyl phosphate salt) of the cutting fluid mother liquor is added, and then water is added for dilution until the concentration is 5wt%, so that white emulsion is obtained, and the working fluid of the heavy-load water-based lubricating cutting fluid containing the ionic liquid is obtained.

The cutting fluid prepared in example 3 was subjected to the same performance test conditions as in example 1.

Test results:

1. the results of the tribological property test are shown in FIG. 1, and it can be seen that the lubricating cutting of example 3 after adding 3wt% of imidazole ionic liquidMaximum seizure-free load P of liquid _B The extreme pressure performance was improved over example 1 by increasing the value to 1236N and was far beyond the maximum seizure free load P of commercially available Fulank (AN 81) of comparative example 1 _B Value 784N, comparative example 2 commercial Rockwell (BRAR 208) maximum no-bite load P _B Value 588N, comparative example 3 commercial Fors 600 maximum no bite load P _B Value 412N.

Meanwhile, as shown in fig. 3, the lubricating cutting fluid of example 3 has a friction coefficient of 0.086, less than 0.1, good lubricating property, also significantly lower than that of the commercial fos 600 of comparative example 3, and has a friction coefficient comparable to that of the commercial los (BRAR 208) of comparative example 2.

In addition, as shown in fig. 6, the lubricating cutting fluid of example 3 had a plaque diameter (WSD) of 0.756mm and a relatively smooth surface, and was suitable for use as a metal cutting fluid.

Example 4

Embodiment 4 provides an ionic liquid-containing heavy-load water-based lubricating cutting fluid, which comprises a cutting fluid mother liquor, and the preparation method of the cutting fluid mother liquor is the same as that of embodiment 1.

When the heavy-load water-based lubricating cutting fluid containing the ionic liquid is used, 2g of cutting fluid mother liquor is taken, imidazole ionic liquid (diethyl 1-ethyl-3-methylimidazole phosphate salt) accounting for 5wt% of the cutting fluid mother liquor is added, and then water is added for dilution until the concentration is 5wt%, so that white emulsion is obtained, and the working fluid of the heavy-load water-based lubricating cutting fluid containing the ionic liquid is obtained.

The cutting fluid prepared in example 4 was subjected to the same performance test conditions as in example 1.

Test results:

1. as shown in FIG. 1, it can be seen that the lubricating cutting fluid of example 4 has a maximum seizure-free load P after the imidazole ionic liquid content has been increased to 5wt% _B The value is still 1236N, and the extreme pressure performance is excellent.

As shown in fig. 3, the lubricating cutting fluid of example 4 had a friction coefficient of 0.088, less than 0.1, and good lubricating properties, which was significantly lower than the friction coefficient of fos 600 commercially available in comparative example 3, and was not much different from the friction coefficient of los (BRAR 208) commercially available in comparative example 2.

Meanwhile, as shown in fig. 6, the diameter of the abrasive spot of the lubricating cutting fluid in example 4 slightly decreases with the increase of the content of the ionic liquid, which is 0.755mm, and the surface is smoother.

2. As shown in fig. 2, the tapping torque values of the lubricating cutting fluid of example 4 are slightly different from those of example 1, and are significantly lower than the combination properties of the lubricating cutting fluid of comparative example 1, such as frank (AN 81), the los (BRAR 208) and the fos 600, respectively, to demonstrate that the lubricating cutting fluid prepared in example 4 is more excellent in extreme pressure, lubrication and the like.

Example 5

Example 5 provides an ionic liquid-containing heavy-load water-based lubricating cutting fluid, and the preparation method of the cutting lubricating fluid is the same as that of example 4. Example 5 differs from example 4 in that the cutting fluid of example 5 was subjected to tribological performance testing by lowering the load 510N to 392N under the test conditions, while the other conditions were unchanged.

As shown in fig. 4, it can be seen that the friction coefficient of the lubricating cutting fluid was not changed with the reduction of the bearing capacity, and was still 0.088, indicating that the lubricating performance of the lubricating cutting fluid was good.

Further, as shown in FIG. 6, the plaque diameter in the test results of example 5 decreased with decreasing load to 0.586mm, and the surface was smooth and flat, which was suitable for use as a metal cutting fluid.

Example 6

Embodiment 6 provides an ionic liquid-containing heavy-load water-based lubricating cutting fluid, which comprises a cutting fluid mother liquor, and the preparation method of the cutting fluid mother liquor is the same as that of embodiment 1.

When the heavy-load water-based lubricating cutting fluid containing the ionic liquid is used, 2g of cutting fluid mother liquor is taken, the imidazole ionic liquid (1-ethyl-3-methylimidazole diethyl phosphate salt) accounting for 7wt% of the cutting fluid mother liquor is added, and then water is added for dilution until the concentration is 5wt%, so that white emulsion is obtained, and the working fluid of the heavy-load water-based lubricating cutting fluid containing the ionic liquid is obtained.

The cutting fluid prepared in example 6 was subjected to the same performance test conditions as in example 1.

Test results:

1. as shown in FIG. 1, it can be seen that the lubricating cutting fluid of example 6 has a maximum seizure-free load P after the imidazole ionic liquid content is increased to 7wt% _B The extreme pressure property was further improved by increasing the value to 1363N as compared with example 4.

Meanwhile, as shown in fig. 3, the friction coefficient of the lubricating cutting fluid of example 6 is 0.086, which is significantly lower than the friction coefficient of fos 600 sold in comparative example 3, and is slightly different from that of los (BRAR 208) sold in comparative example 2, and the lubricating performance is good.

As shown in FIG. 6, the lubricating cutting fluid of example 6 had a plaque diameter (WSD) of 0.805mm and a relatively smooth surface, and was suitable for use as a metal cutting fluid.

2. As shown in fig. 2, it can be seen that the lubricating cutting fluid tapping torque values of example 4 were lower than those of example 1 and far exceeded those of comparative example 1, commercially available cutting fluid frank (AN 81), comparative example 2, commercially available cutting fluid los (BRAR 208), and comparative example 3, commercially available cutting fluid fos 600. The lubricating cutting fluid of example 6 has further improved comprehensive properties such as extreme pressure and lubrication due to the addition of the ionic liquid.

Example 7

Embodiment 7 provides an ionic liquid-containing heavy-load water-based lubricating cutting fluid, which comprises a cutting fluid mother liquor, and the preparation method of the cutting fluid mother liquor is the same as that of embodiment 1.

When the heavy-load water-based lubricating cutting fluid containing the ionic liquid is used, 2g of cutting fluid mother liquor is taken, the imidazole ionic liquid (1-ethyl-3-methylimidazole diethyl phosphate salt) accounting for 7wt% of the cutting fluid mother liquor is added, and then water is added for dilution until the concentration is 10wt%, so that white emulsion is obtained, and the working fluid of the heavy-load water-based lubricating cutting fluid containing the ionic liquid is obtained.

The cutting fluid prepared in example 7 was subjected to the same performance test conditions as in example 1.

Test results:

1. the results of the tribological property test are shown in FIG. 1, and it can be seen that the maximum seizure-free load P is reached when the concentration of the cutting fluid is increased from 5wt% in example 6 to 10wt% in example 7 _B The value is 1294N, and the extreme pressure property is still very excellent.

Meanwhile, as shown in fig. 3, the lubricating cutting fluid of example 7 has a friction coefficient of 0.088, good lubricating performance, and a friction coefficient significantly lower than that of fos 600 commercially available in comparative example 3, and a friction coefficient slightly different from that of los (BRAR 208) commercially available in comparative example 2.

As shown in FIG. 6, the lubricating cutting fluid of example 7 had a plaque diameter (WSD) of 0.930mm and a relatively smooth surface, and was suitable for use as a metal cutting fluid.

2. As shown in fig. 2, the tapping torque values of the lubricating cutting fluid of example 7 are still lower than those of example 1, and far exceed those of the commercial cutting fluid of comparative example 1, namely frank (AN 81), the commercial cutting fluid of comparative example 2, namely ross (BRAR 208) and the commercial cutting fluid of comparative example 3, namely ross 600, and are the same as those of the lubricating cutting fluid of example 6, so that the lubricating cutting fluid has excellent comprehensive properties, such as lubrication.

Example 8

Embodiment 8 provides an ionic liquid-containing heavy-load water-based lubricating cutting fluid, which comprises a cutting fluid mother liquor, and the preparation method of the cutting fluid mother liquor is the same as that of embodiment 1.

When the heavy-load water-based lubricating cutting fluid containing the ionic liquid is used, 2g of cutting fluid mother liquor is taken, imidazole ionic liquid (1-ethyl-3-methylimidazole diethyl phosphate salt) accounting for 10wt% of the cutting fluid mother liquor is added, and then water is added for dilution until the concentration is 5wt%, so that white emulsion is obtained, and the working fluid of the heavy-load water-based lubricating cutting fluid containing the ionic liquid is obtained.

The cutting fluid prepared in example 8 was subjected to the same performance test conditions as in example 1.

Test results:

1. the results of the tribological performance test are shown in FIG. 1, and it can be seen that the lubricating cutting fluid of example 8 has a maximum seizure-free load P by continuing to increase the content of the imidazole ionic liquid to 10 wt.% _B The extreme pressure property is further improved by increasing the value to 1432N.

Meanwhile, as shown in fig. 3, the friction coefficient of the lubricating cutting fluid of example 8 was 0.081, less than 0.1, which is significantly lower than that of the commercial foss 600 of comparative example 3.

As shown in FIG. 6, the lubricating cutting fluid of example 8 had a plaque diameter (WSD) of 0.704mm and a relatively smooth surface, and was suitable for use as a metal cutting fluid.

2. As shown in fig. 2, the tapping torque values of the lubricating cutting fluid of example 8 are far lower than the values of the cutting fluid of comparative example 1, namely, frank (AN 81), comparative example 2, namely, the cutting fluid of comparative example 2, namely, los (BRAR 208), and comparative example 3, namely, the cutting fluid of commercially available fos 600, and the lubricating properties are better.

Example 9

Example 9 provides an ionic liquid-containing heavy-load water-based lubricating cutting fluid, and the preparation method of the cutting lubricating fluid is the same as that of example 8. Example 9 differs from example 8 in that the cutting fluid of example 9 was subjected to tribological performance testing by lowering the load 510N to 392N under the test conditions, and the other conditions were unchanged.

As shown in fig. 4, it can be seen that the friction coefficient of the lubricating cutting fluid of example 9 was slightly changed with the reduction of the bearing capacity, and was 0.090, less than 0.1, and the lubricating performance was good.

In addition, as shown in FIG. 6, the plaque diameter in the test result of example 9 was reduced with the load, which was reduced to 0.613mm, while the surface was smooth and flat, and was suitable for use as a metal cutting fluid.

Example 10

Embodiment 10 provides an ionic liquid-containing heavy-load water-based lubricating cutting fluid, which comprises a cutting fluid mother solution, wherein the preparation method of the cutting fluid mother solution is the same as that of embodiment 1.

When the heavy-load water-based lubricating cutting fluid containing the ionic liquid is used, 2g of cutting fluid mother liquor is taken, imidazole ionic liquid (1-ethyl-3-methylimidazole diethyl phosphate salt) accounting for 15wt% of the cutting fluid mother liquor is added, and then water is added for dilution until the concentration is 5wt%, so that white emulsion is obtained, and the working fluid of the heavy-load water-based lubricating cutting fluid containing the ionic liquid is obtained.

The conditions for testing tribological properties of the cutting fluid prepared in example 10 were the same as those of example 1.

Test results:

1. friction ofAs shown in FIG. 1, it can be seen that the lubricating cutting fluid of example 10 has a maximum seizure-free load P by continuing to increase the imidazole ionic liquid content to 15 wt.% _B The value is slightly reduced to 1363N, and the extreme pressure property is still improved to a certain extent.

Meanwhile, as shown in fig. 3, the lubricating cutting fluid of example 10 had a coefficient of friction of 0.078, less than 0.1, and significantly lower than that of the commercial foss 600 of comparative example 3.

As shown in FIG. 6, the lubricating cutting fluid of example 10 had a plaque diameter (WSD) of 0.930mm and a relatively smooth surface, and was suitable for use as a metal cutting fluid.

2. As shown in fig. 2, the tapping torque values of the lubricating cutting fluid of example 10 were lower and the lubricating and other comprehensive properties were better than those of the commercial cutting fluid of comparative example 1, frank (AN 81), the commercial cutting fluid of comparative example 2, los (BRAR 208), and the commercial cutting fluid of comparative example 3, fos 600.

Table 1 shows various indexes of physicochemical properties, rust resistance and corrosion resistance of the lubricating cutting fluids prepared in example 1, example 3, example 4, example 6, example 8 and example 10 and comparative examples 1 to 3. As can be seen from Table 1, the water-based lubricating cutting fluid prepared in each example of the invention has the rust resistance and corrosion resistance reaching A level and good comprehensive performance.

TABLE 1

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In conclusion, the invention realizes the improvement of the friction performance under high load by utilizing the imidazole ionic liquid through the optimized adjustment of the raw materials and the preparation process, and the friction performance is expressed as the maximum seizure-free load P _B The value can reach 1432N, and the lubricating performance is excellent through tribological property evaluation, and the friction coefficient is lower than 0.1. And common inCompared with the commercial lubricating cutting fluid, the tapping torque value is obviously reduced, which proves that the comprehensive performance of the lubricating cutting fluid is obviously improved. The lubricating cutting fluid has good application prospects in multiple fields such as metal cutting and grinding.

The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The heavy-load water-based lubricating cutting fluid containing the ionic liquid is characterized by being prepared from the following raw materials in parts by weight: 5 to 7 parts of organic acid, 1 to 1.5 parts of organic alcohol amine, 10 to 15 parts of synthetic ester, 1.7 to 2 parts of zinc dialkyl dithiophosphate, 0.25 to 0.75 part of benzotriazole, 0.25 to 0.75 part of defoamer, 0.5 to 1.5 parts of triethanolamine borate, 12 to 17.6 parts of polyether, 2 to 4 parts of sodium petroleum sulfonate, 2 to 3 parts of tween, 19 to 24 parts of span, 1.5 to 15 parts of imidazole ionic liquid and 5 to 15 parts of deionized water.

2. The ionic liquid heavy-load water-based lubricating cutting fluid containing the ionic liquid according to claim 1, wherein the synthetic ester is one or more of pentaerythritol oleate, trimethylolpropane cocoate, diisooctyl sebacate, neopentyl glycol oleate and isooctyl stearate;

the organic acid is one or more of oleic acid, octanoic acid, isooctanoic acid, decanoic acid, sebacic acid and undecanoic dibasic acid;

the polyether is one or more of ethylene glycol monobutyl ether, diethylene glycol butyl ether and dipropylene glycol butyl ether;

the organic alcohol amine is one or more of triisopropanolamine, diethanolamine and triethanolamine.

3. The ionic liquid-containing heavy-load water-based lubricating cutting fluid according to claim 1, wherein the defoaming agent is one or both of modified silicone oil and natural oil.

4. The heavy-load water-based lubricating cutting fluid containing ionic liquid according to claim 1, wherein the imidazole ionic liquid is one or more of diethyl 1-ethyl-3-methylimidazole phosphate, diethyl 1-vinyl-3-ethylimidazole phosphate and 1-butyl-3-methylimidazole hexafluorophosphate.

5. The preparation method of the heavy-load water-based lubricating cutting fluid containing the ionic liquid is characterized by comprising the following steps of:

2) Mixing the synthetic ester, the zinc dialkyl dithiophosphate, the benzotriazole and the defoamer, uniformly stirring, and then heating to 40-50 ℃ to obtain a solution B;

6. The process according to claim 5, wherein the mass ratio of the organic acid to the organic alcohol amine in the step 1) is (3-20): 1.

7. The preparation method according to claim 5, wherein the mass ratio of synthetic ester, ZDDP, benzotriazole and defoamer in step 2) is (1-10): (0.925-9.25): (0.25-2.5): (0.25-2.5).

8. The preparation method according to claim 5, wherein the mass ratio of deionized water to triethanolamine borate in the step 3) is (5-20): 1.

9. the method of claim 5, wherein the imidazole ion liquid is added in an amount of 3-18wt% of the cutting fluid mother liquor.

10. Use of the heavy-duty water-based lubricating cutting fluid containing an ionic liquid according to any one of claims 1 to 4 in a metal cutting or grinding process.