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

Abstract

The present invention belongs to the technical field of metalworking fluids, and specifically relates to a heavy-load water-based lubricating cutting fluid containing ionic liquids and a preparation method thereof. The heavy-load water-based lubricating cutting fluid containing ionic liquids of the present invention 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, 1.7 to 2 parts of zinc dialkyl dithiophosphate, 0.25 to 0.75 parts of benzotriazole, 0.25 to 0.75 parts of defoaming agent, 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 Spans, 1.5 to 15 parts of imidazole ionic liquids, and 5 to 15 parts of deionized water. The present invention utilizes imidazole ionic liquids to achieve an improvement in friction performance under high loads, which is manifested as a maximum no-seizure load P B The value can reach 1432N. Compared with the common commercially available lubricating cutting fluid, the tapping torque value of the present invention is significantly reduced, and the tribological performance evaluation shows that the present invention has excellent lubrication performance.

Description

Technical Field

[0001] The invention belongs to the technical field of metalworking fluids, and in particular relates to a heavy-load water-based lubricating cutting fluid containing ionic liquid and a preparation method thereof. Background Art

[0002] Metal cutting fluid has functions such as cooling, lubrication, rust prevention, and cleaning. It plays a very important role in the process of metal cutting and grinding. Choosing the right metal cutting fluid can extend the service life of cutting tools such as tools and grinding wheels, thereby improving production efficiency and product quality. With the increasingly stringent requirements for workpiece precision in industrial production, in order to further improve cutting efficiency, work accuracy, and reduce the roughness of metal surfaces, it is necessary to further improve the comprehensive performance of metal cutting fluids, which has also become a problem to be solved in the research process of metal cutting fluids.

[0003] Ionic liquids, also known as room temperature ionic liquids and room temperature molten salts, are salts composed of organic cations and inorganic anions and are in liquid state below 100°C. Due to the diversity of organic cations and inorganic anions, ionic liquids with specific functions can be designed through different ratios and combinations, and are widely used in various fields. As additives for metal cutting fluids, ionic liquids can effectively improve the extreme pressure, wear resistance and lubrication effect of water-based cutting fluids, thereby improving their thermal stability and chemical stability.

[0004] The Chinese patent with publication number CN103555392A discloses a microemulsified metal cutting fluid containing ionic liquid and its preparation method and application, wherein a rust inhibitor is poured into water to form a water system, an extreme pressure additive, a defoamer, and a bactericide are sequentially added to a base oil to form an oil system, the water system and the oil system are stirred and mixed, a surfactant and an ionic liquid are added, and the pH is adjusted to obtain a microemulsified metal cutting fluid with good performance. Although the metal cutting fluid in this patent has good stability, lubricity and other characteristics, its anti-friction performance is poor. B The value (maximum bite without load) only reaches 98kg, which needs to be improved. Therefore, it is of great significance to develop a heavy-load metal cutting fluid containing ionic liquid and suitable for cutting of high-precision and high-demand metal workpieces.

[0005] Based on this, the present invention adjusts the composition ratio of the cutting fluid to improve the extreme pressure lubricity of the cutting fluid and the interaction between the components, so as to improve the friction performance. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a heavy-load water-based lubricating cutting fluid containing ionic liquid with high load-bearing capacity and good lubrication performance, and to optimize and adjust the raw materials and preparation process so that it has excellent tribological properties.

[0007] The invention also provides a method for preparing the heavy-load water-based lubricating cutting fluid containing ionic liquid.

[0008] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0009] A heavy-duty water-based lubricating cutting fluid containing 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 parts of benzotriazole, 0.25 to 0.75 parts of defoaming agent, 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.

[0010] Specifically, the synthetic ester is one or more of pentaerythritol oleate, trimethylolpropane oleate, trimethylolpropane coconut oleate, 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 two is 1:(1-10).

[0011] Specifically, the organic acid is one or more of oleic acid, octanoic acid, isooctanoic acid, capric acid, sebacic acid, and undecanedicarboxylic acid; preferably oleic acid.

[0012] 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 the role of emulsification, dispersion and lubrication in the cutting fluid.

[0013] Specifically, the defoaming agent is one or both of modified silicone oil and natural oil; preferably modified silicone oil, brand name Mengqingxin MS575.

[0014] 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, and is also a good stabilizer and defoaming agent, which can improve the stability of the cutting fluid.

[0015] Specifically, the Tween is one or more of Tween 20, Tween 40, Tween 60, and Tween 80; preferably Tween 60.

[0016] Specifically, the organic alcohol amine is one or more of triisopropanolamine, diethanolamine, and triethanolamine; preferably, triethanolamine.

[0017] Specifically, the imidazole ionic liquid is one or more of 1-ethyl-3-methylimidazolium diethyl phosphate, 1-vinyl-3-ethylimidazolium diethyl phosphate, and 1-butyl-3-methylimidazolium hexafluorophosphate; preferably 1-ethyl-3-methylimidazolium diethyl phosphate.

[0018] The oleic acid and organic alcohol amine in the heavy-load water-based lubricating cutting fluid containing ionic liquid of the present invention have good anti-rust lubrication and antibacterial stabilization effects, and can effectively prevent corrosion and deterioration; benzotriazole is a very excellent metal rust inhibitor and corrosion inhibitor, and can improve the anti-rust performance of the cutting fluid; zinc dialkyl dithiophosphate (ZDDP) has very excellent extreme pressure lubrication performance and plays a lubricating role.

[0019] In the heavy-load water-based lubricating cutting fluid containing ionic liquid of the present invention, non-ionic surfactants diethylene glycol butyl ether (polyether), Span, Tween and anionic surfactant sodium petroleum sulfonate are compounded to play a good emulsification and stabilization role, so that each component is evenly and stably dispersed in water, and the sedimentation, stratification, agglomeration, flocculation or aging of the effective ingredients are prevented, thereby improving the storage stability of the micro-emulsified cutting fluid; in addition, sodium petroleum sulfonate also has a very excellent anti-rust effect.

[0020] Specifically, the pH value of the cutting fluid is 8.0-10.0, preferably 8.0-9.0.

[0021] Furthermore, the present invention also provides a method for preparing a heavy-load water-based lubricating cutting fluid containing ionic liquid, comprising the following steps:

[0022] 1) After mixing the organic acid and the organic alcohol amine, the temperature is raised to 70-80° C. and stirred evenly for 20-30 minutes to obtain emulsion A;

[0023] 2) Mix the synthetic ester, ZDDP (zinc dialkyl dithiophosphate), benzotriazole and defoamer, stir evenly, and then heat to 40-50° C. to obtain solution B;

[0024] 3) After mixing deionized water and triethanolamine borate, the mixture is heated to 45-55° C. and stirred evenly for 20-30 minutes to obtain solution C;

[0025] 4) Add solution C to solution B, keep the solution temperature at 40-50°C, then add polyether, stir evenly, add them to emulsion A, mix evenly at 40-50°C, then add sodium petroleum sulfonate, Tween, and Span in sequence, stir evenly for 20-30 minutes, and obtain cutting fluid mother solution;

[0026] Imidazole ionic liquid is added to the cutting fluid mother liquid, and then the cutting fluid mother liquid is diluted with water to obtain a white emulsion, which is the water-based lubricating cutting fluid.

[0027] Preferably, in step 1), the mass ratio of the organic acid to the organic alcohol amine is (3-20):1, preferably 4.8:1.

[0028] Preferably, in step 2), the mass ratio of the synthetic ester, ZDDP, benzotriazole and defoaming agent is (1-10): (0.925-9.25): (0.25-2.5): (0.25-2.5), preferably 4:3.7:1:1.

[0029] Preferably, in step 3), the mass ratio of deionized water to triethanolamine borate is (5-20):1, preferably 10:1.

[0030] Preferably, during dilution in step 4), the cutting fluid mother solution is diluted with water to a concentration of 5-10 wt % as the working fluid, preferably 5 wt % or 10 wt %.

[0031] Preferably, in step 4), the amount of imidazole ionic liquid added is 3-18 wt% of the cutting fluid mother liquid, preferably 3 wt%, 5 wt%, 7 wt%, 10 wt% or 15 wt%.

[0032] Specifically, the organic acid in step 1) is one or more of oleic acid, octanoic acid, isooctanoic acid, capric acid, sebacic acid, and undecanedicarboxylic acid; preferably oleic acid.

[0033] Specifically, in step 1), the organic alcohol amine is one or more of triisopropanolamine, diethanolamine, and triethanolamine; preferably triethanolamine.

[0034] Specifically, the synthetic ester in step 2) is one or more of pentaerythritol oleate, trimethylolpropane oleate, trimethylolpropane coconut oleate, diisooctyl sebacate, neopentyl glycol oleate, and isooctyl stearate; preferably pentaerythritol oleate and trimethylolpropane oleate; the mass ratio of pentaerythritol oleate to trimethylolpropane oleate is 1:(1-10).

[0035] Specifically, the defoaming agent in step 2) is one or both of modified silicone oil and natural oil; preferably modified silicone oil, brand name Mengqingxin MS575.

[0036] Specifically, the polyether in step 4) is one or more of ethylene glycol monobutyl ether, diethylene glycol butyl ether, and dipropylene glycol butyl ether; preferably diethylene glycol butyl ether.

[0037] Specifically, the Tween in step 4) is one or more of Tween 20, Tween 40, Tween 60, and Tween 80; preferably Tween 60.

[0038] Specifically, the Span in step 4) 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, and is also a good stabilizer and defoaming agent, which can improve the stability of the cutting fluid.

[0039] Specifically, the imidazole ionic liquid is one or more of 1-ethyl-3-methylimidazolium diethyl phosphate, 1-vinyl-3-ethylimidazolium diethyl phosphate, and 1-butyl-3-methylimidazolium hexafluorophosphate; preferably 1-ethyl-3-methylimidazolium diethyl phosphate.

[0040] Furthermore, the present invention also provides the use of the heavy-load water-based lubricating cutting fluid containing ionic liquid in a metal cutting or grinding process.

[0041] Specifically, the cutting object is one or more of aluminum alloy, steel, magnesium aluminum alloy, and zinc aluminum alloy; aluminum alloy is preferred.

[0042] Compared with the prior art, the advantages of the present invention are:

[0043] 1. The present invention utilizes imidazole ionic liquid to achieve an improvement in friction performance under high load, which is manifested as a maximum non-seizure load P B The value can reach 1432N, and the tribological performance evaluation shows that it has excellent lubrication performance, with a friction coefficient of less than 0.1.

[0044] 2. Compared with the common commercially available lubricating cutting fluid, the tapping torque value of the present invention is significantly reduced, which indicates that the comprehensive performance of the lubricating cutting fluid of the present invention is significantly improved.

[0045] 3. Compared with traditional lubricating cutting fluids, the present invention has a simple preparation method and can achieve lubrication under long-term high-load conditions on the steel-steel contact surface in a low-friction process, and generates less heat, thereby reducing energy consumption and ensuring production safety.

[0046] 4. The lubricating cutting fluid product prepared by the present invention also has excellent anti-rust and anti-corrosion properties, and the anti-rust and anti-corrosion properties reach Class A, with excellent comprehensive performance.

[0047] The preparation method of the invention is simple to operate, low in cost, does not require expensive experimental instruments and equipment, is easy to implement large-scale batch production, and has important application potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 The maximum no-seizure load P of the lubricating cutting fluids prepared in Example 1, Example 3, Example 4, Examples 6-8, and Example 10 of the present invention, and the maximum no-seizure load P of Comparative Examples 1-3 B Value test results;

[0049] Figure 2 It is a tapping torque diagram of Example 1, Example 4, Examples 6-8, Example 10, and Comparative Examples 1-3 of the present invention;

[0050] Figure 3 The friction coefficient curves of Example 1, Example 3, Example 4, Examples 6-8, Example 10, and Comparative Example 2 and Comparative Example 3 in the present invention;

[0051] Figure 4 The friction coefficient curves of the lubricating cutting fluids prepared in Example 2, Example 5, and Example 9 of the present invention;

[0052] Figure 5 From left to right in the figure are optical photographs of the cutting fluid mother solution prepared in Example 1, the commercially available cutting fluid Frank (AN81) in Comparative Example 1, the commercially available cutting fluid Los (BRAR208) in Comparative Example 2, and the commercially available Fuchs 600 in Comparative Example 3;

[0053] Figure 6 These are the test results of wear spot diameter of the lubricating cutting fluids prepared in Examples 1-10 of the present invention. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0055] Comparative Example 1

[0056] Comparative Example 1 is a commercially available cutting fluid Frank (AN81), which was diluted with water to a concentration of 5 wt % for performance testing.

[0057] Comparative Example 2

[0058] Comparative Example 2 is a commercially available cutting fluid Los (BRAR208), which was diluted with water to a concentration of 5 wt % for performance testing.

[0059] Comparative Example 3

[0060] Comparative Example 3 is a commercially available cutting fluid, Fuchs 600, which was diluted with water to a concentration of 5 wt % for performance testing.

[0061] Example 1

[0062] Embodiment 1 provides a heavy-duty water-based lubricating cutting fluid containing ionic liquid, including a cutting fluid mother liquid, wherein the cutting fluid mother liquid is prepared by the following steps:

[0063] 1) Add 6 g of organic acid (oleic acid) and 1.25 g of organic alcohol amine (triethanolamine) into a flask, heat to 75°C, and stir for 30 min to obtain emulsion A;

[0064] 2) 6 g of synthetic ester (pentaerythritol oleate), 6 g of synthetic ester (trimethylolpropane oleate), 1.85 g of ZDDP (zinc dialkyl dithiophosphate), 0.5 g of benzotriazole, and 0.5 g of defoamer (modified silicone oil, brand MS575) were added to another flask in sequence. During the addition process, each time a raw material was added, it was stirred evenly before adding the next raw material, and then the temperature was raised to 45° C. to obtain solution B;

[0065] 3) Take another flask, add 10 g of deionized water and 1 g of triethanolamine borate, then heat to 50°C and stir for 30 min to obtain solution C;

[0066] 4) Pour solution C into solution B, keep the temperature at 45°C, add 14.8g of polyether (butyl diglycol), stir evenly, then pour into emulsion A together, stir evenly at 45°C, then add 3g of sodium petroleum sulfonate, 2.5g of Tween 60, and 21.4g of Span 80 respectively, continue stirring for 30 minutes, and finally obtain a light yellow translucent uniform solution, which is the cutting fluid mother liquor.

[0067] Figure 5 From left to right in the figure are optical photographs of the cutting fluid mother liquor prepared in Example 1, the commercially available cutting fluid Frank (AN81) in Comparative Example 1, the commercially available cutting fluid Los (BRAR208) in Comparative Example 2, and the commercially available Foss 600 in Comparative Example 3; it can be seen from the figure that the cutting fluid mother liquor in Example 1, Frank (AN81), Los (BRAR208), and Foss 600 are all light yellow translucent solutions.

[0068] When the heavy-load water-based lubricating cutting fluid containing ionic liquid is used, 2 g of cutting fluid mother liquid is taken, and then water is added to dilute it to a concentration of 5 wt % to obtain a white emulsion, which is the working fluid of the heavy-load water-based lubricating cutting fluid containing ionic liquid.

[0069] Performance test of cutting fluid prepared in Example 1:

[0070] 1. The tribological properties of the prepared lubricating cutting fluid were tested using a four-ball friction tester (MS-10A).

[0071] The steel ball used in the test is GCr15 bearing steel balls. The test conditions are room temperature, load 510N, speed 1450r / min, friction coefficient (COF) after 30min of long wear and maximum no-seizure load (P B value).

[0072] The wear spot diameter on the steel ball surface was tested using an XDS-0745D optical microscope and a MicroXAM 3D non-contact surface tester.

[0073] 2. Use the tapping torque test system to test the tapping torque value during the cutting or deformation process of metal processing.

[0074] The test workpiece is a 6082# aluminum alloy nut with an inner diameter of 3.7mm and a high-precision yellow titanium-plated extrusion tap with model number TTT_M4F-TINT.

[0075] Test results:

[0076] 1. Tribological performance test results are as follows: Figure 1 As shown, it can be seen that the maximum non-seizure load P of the lubricating cutting fluid with a concentration of 5wt% in Example 1 B The value can reach 1118N, far exceeding the maximum no-seizure load P of Frank (AN81) on the market in Comparative Example 1 B Value 784N, Comparative Example 2 Commercially available Los (BRAR208) Maximum no-seizure load P B Value 588N, Comparative Example 3 Commercially available Fuchs 600 Maximum No-Seizure Load P B Value is 412N, and its extreme pressure performance is even better.

[0077] In addition, if Figure 3 As shown, the friction coefficient of the lubricating cutting fluid prepared in Example 1 is 0.086, which is significantly lower than the friction coefficient of the commercially available Fuchs 600 in Comparative Example 3, and is not much different from the friction coefficient of the commercially available Los (BRAR208) in Comparative Example 2, indicating that the lubrication performance of Example 1 is good.

[0078] At the same time Figure 6 As shown, the wear spot diameter (WSD) of the lubricating cutting fluid prepared in Example 1 is 0.750 mm, the wear spot diameter is small and the surface is relatively flat and smooth, and it is suitable for use as a metal cutting fluid.

[0079] 2. The numerical test results of tapping torque are as follows: Figure 2 As shown, it can be seen that the tapping torque value of the lubricating cutting fluid prepared in Example 1 is significantly lower than that of the commercially available cutting fluid Frank (AN81) in Comparative Example 1, the commercially available Los (BRAR208) in Comparative Example 2, and the commercially available Fuchs 600 in Comparative Example 3, indicating that the comprehensive properties of the lubricating cutting fluid prepared in Example 1, such as extreme pressure and lubrication, are more excellent.

[0080] Example 2

[0081] Example 2 provides a heavy-load water-based lubricating cutting fluid containing ionic liquid, and the preparation method of the cutting lubricating fluid is the same as that of Example 1. The difference between Example 2 and Example 1 is that when the cutting fluid of Example 2 is subjected to the tribological performance test, the load of 510N in the test condition is reduced to 392N, and other conditions remain unchanged.

[0082] Test results such as Figure 4 As shown, it can be seen that in the test results of Example 2, the friction coefficient drops to 0.082 as the load-bearing capacity decreases, indicating that the lubrication performance of the lubricating cutting fluid is improved to a certain extent.

[0083] In addition, Figure 6 As shown, in the test results of Example 2, the wear spot diameter decreases as the load decreases, and it is reduced to 0.571 mm. At the same time, the surface is smooth and flat, which is suitable for use as a metal cutting fluid.

[0084] Example 3

[0085] Example 3 provides a heavy-load water-based lubricating cutting fluid containing ionic liquid, including a cutting fluid mother liquid. The preparation method of the cutting fluid mother liquid is the same as that of Example 1.

[0086] When the heavy-load water-based lubricating cutting fluid containing ionic liquid is used, 2 g of cutting fluid mother liquid is taken, and 3 wt% of imidazole ionic liquid (1-ethyl-3-methylimidazole diethyl phosphate) is added to the cutting fluid mother liquid, and then water is added to dilute it to a concentration of 5 wt% to obtain a white emulsion, which is the working fluid of the heavy-load water-based lubricating cutting fluid containing ionic liquid.

[0087] The test conditions for the performance of the cutting fluid prepared in Example 3 are the same as those in Example 1.

[0088] Test results:

[0089] 1. Tribological performance test results are as follows: Figure 1 As shown, it can be seen that after adding 3wt% imidazole ionic liquid, the maximum non-seizure load P of the lubricating cutting fluid of Example 3 B The value increases to 1236N, and the extreme pressure performance is improved compared with Example 1, and it is far higher than the maximum no-seizure load P of Frank (AN81) on the market in Comparative Example 1. B Value 784N, Comparative Example 2 Commercially available Los (BRAR208) Maximum no-seizure load P B Value 588N, Comparative Example 3 Commercially available Fuchs 600 Maximum No-Seizure Load P B Value 412N.

[0090] At the same time, if Figure 3As shown, the friction coefficient of the lubricating cutting fluid in Example 3 is 0.086, which is less than 0.1, and has good lubrication performance. It is also significantly lower than the friction coefficient of the commercially available Fuchs 600 in Comparative Example 3, and is not much different from the friction coefficient of the commercially available Los (BRAR208) in Comparative Example 2.

[0091] In addition, Figure 6 As shown, the wear spot diameter (WSD) of the lubricating cutting fluid of Example 3 is 0.756 mm, and the surface is relatively flat and smooth, which is suitable for use as a metal cutting fluid.

[0092] Example 4

[0093] Example 4 provides a heavy-load water-based lubricating cutting fluid containing ionic liquid, including a cutting fluid mother liquid. The preparation method of the cutting fluid mother liquid is the same as that of Example 1.

[0094] When the heavy-load water-based lubricating cutting fluid containing ionic liquid is used, 2 g of cutting fluid mother liquid is taken, and 5 wt% of imidazole ionic liquid (1-ethyl-3-methylimidazole diethyl phosphate) is added to the cutting fluid mother liquid, and then water is added to dilute it to a concentration of 5 wt% to obtain a white emulsion, which is the working fluid of the heavy-load water-based lubricating cutting fluid containing ionic liquid.

[0095] The cutting fluid performance test conditions prepared in Example 4 are the same as those in Example 1.

[0096] Test results:

[0097] 1. Tribological performance test results are as follows: Figure 1 As shown in the figure, it can be seen that when the content of imidazole ionic liquid increases to 5wt%, the maximum non-seizure load P of the lubricating cutting fluid of Example 4 B The value is still 1236N, and the extreme pressure performance is excellent.

[0098] like Figure 3 As shown, the friction coefficient of the lubricating cutting fluid in Example 4 is 0.088, which is less than 0.1, and has good lubrication performance. It is significantly lower than the friction coefficient of the commercially available Fuchs 600 in Comparative Example 3, and is not much different from the friction coefficient of the commercially available Los (BRAR208) in Comparative Example 2.

[0099] At the same time Figure 6 As shown, the wear spot diameter of the lubricating cutting fluid of Example 4 decreases slightly with the increase of the ionic liquid content, which is 0.755 mm, and the surface is relatively flat and smooth.

[0100] 2. The numerical test results of tapping torque are as follows: Figure 2As shown, it can be seen that the tapping torque value of the lubricating cutting fluid of Example 4 is not much different from that of Example 1, and is significantly lower than the commercially available cutting fluid Frank (AN81) of Comparative Example 1, the commercially available Los (BRAR208) of Comparative Example 2, and the commercially available Fuchs 600 of Comparative Example 3, indicating that the comprehensive properties of the lubricating cutting fluid prepared in Example 4, such as extreme pressure and lubrication, are more excellent.

[0101] Example 5

[0102] Example 5 provides a heavy-load water-based lubricating cutting fluid containing ionic liquid, and the preparation method of the cutting lubricating fluid is the same as that of Example 4. The difference between Example 5 and Example 4 is that when the cutting fluid of Example 5 is subjected to the tribological performance test, the load of 510N in the test condition is reduced to 392N, and other conditions remain unchanged.

[0103] Test results such as Figure 4 As shown, it can be seen that the friction coefficient of the lubricating cutting fluid does not change with the decrease of the load-bearing capacity, and is still 0.088, indicating that the lubricating cutting fluid has good lubrication performance.

[0104] In addition, Figure 6 As shown, in the test results of Example 5, the diameter of the wear spot decreases as the load decreases, and it is reduced to 0.586 mm. At the same time, the surface is smooth and flat, which is suitable for use as a metal cutting fluid.

[0105] Example 6

[0106] Example 6 provides a heavy-load water-based lubricating cutting fluid containing ionic liquid, including a cutting fluid mother liquid. The preparation method of the cutting fluid mother liquid is the same as that of Example 1.

[0107] When the heavy-load water-based lubricating cutting fluid containing ionic liquid is used, 2 g of cutting fluid mother liquid is taken, and 7 wt% of imidazole ionic liquid (1-ethyl-3-methylimidazole diethyl phosphate) is added to the cutting fluid mother liquid, and then water is added to dilute it to a concentration of 5 wt% to obtain a white emulsion, which is the working fluid of the heavy-load water-based lubricating cutting fluid containing ionic liquid.

[0108] The test conditions for the performance of the cutting fluid prepared in Example 6 are the same as those in Example 1.

[0109] Test results:

[0110] 1. Tribological performance test results are as follows: Figure 1 As shown in the figure, it can be seen that after the content of the imidazole ionic liquid is further increased to 7wt%, the maximum non-seizure load P of the lubricating cutting fluid of Example 6 is B The value increases to 1363N, and the extreme pressure performance is further improved compared with Example 4.

[0111] At the same time, if Figure 3As shown, the friction coefficient of the lubricating cutting fluid in Example 6 is 0.086, which is significantly lower than the friction coefficient of the commercially available Fuchs 600 in Comparative Example 3, and is not much different from the commercially available Los (BRAR208) in Comparative Example 2, and has good lubrication performance.

[0112] like Figure 6 As shown, the wear spot diameter (WSD) of the lubricating cutting fluid of Example 6 is 0.805 mm, and the surface is relatively flat and smooth, which is suitable for use as a metal cutting fluid.

[0113] 2. The numerical test results of tapping torque are as follows: Figure 2 As shown, it can be seen that the tapping torque value of the lubricating cutting fluid of Example 4 is lower than that of Example 1, and far exceeds the commercial cutting fluid Frank (AN81) of Comparative Example 1, the commercial cutting fluid Los (BRAR208) of Comparative Example 2, and the commercial cutting fluid Fuchs 600 of Comparative Example 3. This indicates that the comprehensive properties of the lubricating cutting fluid of Example 6, such as extreme pressure and lubrication, are further improved due to the addition of ionic liquid.

[0114] Example 7

[0115] Example 7 provides a heavy-load water-based lubricating cutting fluid containing ionic liquid, including a cutting fluid mother liquid. The preparation method of the cutting fluid mother liquid is the same as that of Example 1.

[0116] When the heavy-load water-based lubricating cutting fluid containing ionic liquid is used, 2 g of cutting fluid mother liquid is taken, and 7 wt% of imidazole ionic liquid (1-ethyl-3-methylimidazole diethyl phosphate) is added to the cutting fluid mother liquid, and then water is added to dilute it to a concentration of 10 wt% to obtain a white emulsion, which is the working fluid of the heavy-load water-based lubricating cutting fluid containing ionic liquid.

[0117] The performance test conditions of the cutting fluid prepared in Example 7 are the same as those in Example 1.

[0118] Test results:

[0119] 1. Tribological performance test results are as follows: Figure 1 As shown in the figure, it can be seen that when the concentration of the cutting fluid increases from 5wt% in Example 6 to 10wt% in Example 7, the maximum no-seizure load P B The value is 1294N, and the extreme pressure properties are still very excellent.

[0120] At the same time, if Figure 3 As shown, the friction coefficient of the lubricating cutting fluid in Example 7 is 0.088, with good lubrication performance, which is significantly lower than the friction coefficient of the commercially available Fuchs 600 in Comparative Example 3, and the friction coefficient is not much different from that of the commercially available Los (BRAR208) in Comparative Example 2.

[0121] like Figure 6As shown, the wear spot diameter (WSD) of the lubricating cutting fluid of Example 7 is 0.930 mm, and the surface is relatively flat and smooth, which is suitable for use as a metal cutting fluid.

[0122] 2. The numerical test results of tapping torque are as follows: Figure 2 As shown, it can be seen that the tapping torque value of the lubricating cutting fluid of Example 7 is still lower than that of Example 1, and far exceeds the commercially available cutting fluid Frank (AN81) of Comparative Example 1, the commercially available cutting fluid Los (BRAR208) of Comparative Example 2, and the commercially available cutting fluid Foss 600 of Comparative Example 3. At the same time, it is equal to the tapping torque value of the lubricating cutting fluid of Example 6, indicating that its comprehensive performance such as lubrication is very excellent.

[0123] Example 8

[0124] Example 8 provides a heavy-load water-based lubricating cutting fluid containing ionic liquid, including a cutting fluid mother liquid. The preparation method of the cutting fluid mother liquid is the same as that of Example 1.

[0125] When the heavy-load water-based lubricating cutting fluid containing ionic liquid is used, 2 g of cutting fluid mother liquid is taken, and 10 wt% of imidazole ionic liquid (1-ethyl-3-methylimidazole diethyl phosphate) is added to the cutting fluid mother liquid, and then water is added to dilute it to a concentration of 5 wt% to obtain a white emulsion, which is the working fluid of the heavy-load water-based lubricating cutting fluid containing ionic liquid.

[0126] The test conditions for the performance of the cutting fluid prepared in Example 8 are the same as those in Example 1.

[0127] Test results:

[0128] 1. Tribological performance test results are as follows: Figure 1 As shown in the figure, it can be seen that when the content of imidazole ionic liquid is further increased to 10wt%, the maximum non-seizure load P of the lubricating cutting fluid of Example 8 B The value increased to 1432N, and the extreme pressure resistance was further improved.

[0129] At the same time, if Figure 3 As shown, the friction coefficient of the lubricating cutting fluid in Example 8 is 0.081, which is less than 0.1 and is significantly lower than the friction coefficient of the commercially available Fuchs 600 in Comparative Example 3.

[0130] like Figure 6 As shown, the wear spot diameter (WSD) of the lubricating cutting fluid of Example 8 is 0.704 mm, and the surface is relatively flat and smooth, which is suitable for use as a metal cutting fluid.

[0131] 2. The numerical test results of tapping torque are as follows: Figure 2As shown, it can be seen that the tapping torque value of the lubricating cutting fluid in Example 8 is much lower than that of the commercially available cutting fluid Frank (AN81) in Comparative Example 1, the commercially available cutting fluid Los (BRAR208) in Comparative Example 2, and the commercially available cutting fluid Foss 600 in Comparative Example 3, and the comprehensive performance such as lubrication is better.

[0132] Example 9

[0133] Example 9 provides a heavy-load water-based lubricating cutting fluid containing ionic liquid, and the preparation method of the cutting lubricating fluid is the same as that of Example 8. The difference between Example 9 and Example 8 is that when the cutting fluid of Example 9 is subjected to the tribological performance test, the load of 510N in the test condition is reduced to 392N, and other conditions remain unchanged.

[0134] Test results such as Figure 4 As shown, it can be seen that the friction coefficient of the lubricating cutting fluid of Example 9 changes slightly with the decrease of the load-bearing capacity, which is 0.090, less than 0.1, and the lubrication performance is good.

[0135] In addition, if Figure 6 As shown, in the test results of Example 9, the diameter of the wear spot decreases as the load decreases, and it is reduced to 0.613 mm. At the same time, the surface is smooth and flat, and is suitable for use as a metal cutting fluid.

[0136] Example 10

[0137] Example 10 provides a heavy-load water-based lubricating cutting fluid containing ionic liquid, including a cutting fluid mother liquid. The preparation method of the cutting fluid mother liquid is the same as that of Example 1.

[0138] When the heavy-load water-based lubricating cutting fluid containing ionic liquid is used, 2 g of cutting fluid mother liquid is taken, and 15 wt% of imidazole ionic liquid (1-ethyl-3-methylimidazole diethyl phosphate) is added to the cutting fluid mother liquid, and then water is added to dilute it to a concentration of 5 wt% to obtain a white emulsion, which is the working fluid of the heavy-load water-based lubricating cutting fluid containing ionic liquid.

[0139] The tribological properties test conditions of the cutting fluid prepared in Example 10 are the same as those in Example 1.

[0140] Test results:

[0141] 1. Tribological performance test results are as follows: Figure 1 As shown in the figure, it can be seen that when the content of imidazole ionic liquid is further increased to 15wt%, the maximum non-seizure load P of the lubricating cutting fluid of Example 10 B The value is slightly reduced to 1363N, and the extreme pressure resistance is still improved to a certain extent.

[0142] At the same time, if Figure 3As shown, the friction coefficient of the lubricating cutting fluid of Example 10 is 0.078, which is less than 0.1, and is significantly lower than the friction coefficient of the commercially available Fuchs 600 of Comparative Example 3.

[0143] like Figure 6 As shown, the wear spot diameter (WSD) of the lubricating cutting fluid of Example 10 is 0.930 mm, and the surface is relatively flat and smooth, which is suitable for use as a metal cutting fluid.

[0144] 2. The numerical test results of tapping torque are as follows: Figure 2 As shown, it can be seen that compared with the commercially available cutting fluid Frank (AN81) in Comparative Example 1, the commercially available cutting fluid Los (BRAR208) in Comparative Example 2, and the commercially available cutting fluid Foss 600 in Comparative Example 3, the lubricating cutting fluid in Example 10 has a lower tapping torque value and better comprehensive performance such as lubrication.

[0145] Table 1 shows the various indicators of the physical and chemical properties, rust 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 1-3. It can be seen from Table 1 that the rust and corrosion resistance of the water-based lubricating cutting fluids prepared in the embodiments of the present invention reach Grade A, and have good comprehensive performance.

[0146] Table 1

[0147]

[0148]

[0149] In summary, the present invention optimizes and adjusts the raw materials and the preparation process, and uses imidazole ionic liquids to achieve an improvement in friction performance under high loads, which is manifested in the maximum no-seizure load P B The value can reach 1432N, and the tribological performance evaluation shows that it has excellent lubrication performance, which is manifested by a friction coefficient of less than 0.1. Compared with the common commercially available lubricating cutting fluid, the tapping torque value is significantly reduced, which shows that the comprehensive performance of the lubricating cutting fluid of the present invention is significantly improved. The lubricating cutting fluid of the present invention has good application prospects in multiple fields such as metal cutting and grinding.

[0150] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A heavy-duty water-based lubricating cutting fluid containing ionic liquid, characterized in that: The invention 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, 0.25 to 0.75 parts of benzotriazole, 0.25 to 0.75 parts of defoaming agent, 0.5 to 1.5 parts of triethanolamine borate, 12 to 17.6 parts of diethylene glycol butyl ether, 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; The synthetic ester is pentaerythritol oleate and / or trimethylolpropane oleate; The organic acid is one or more of oleic acid, octanoic acid, isooctanoic acid, capric acid, sebacic acid, and undecanedicarboxylic acid; The organic alcohol amine is one or more of triisopropanolamine, diethanolamine and triethanolamine; The defoamer is modified silicone oil; The imidazole ionic liquid is 1-ethyl-3-methylimidazole diethyl phosphate or 1-vinyl-3-ethylimidazole diethyl phosphate; The heavy-load water-based lubricating cutting fluid containing ionic liquid is prepared by the following steps: 1) After mixing the organic acid and the organic alcohol amine, the temperature is raised to 70-80°C and stirred evenly for 20-30 minutes to obtain emulsion A; 2) Mix the synthetic ester, zinc dialkyl dithiophosphate, benzotriazole and defoamer, stir evenly, and then heat to 40-50°C to obtain solution B; 3) After mixing deionized water and triethanolamine borate, heat to 45-55°C and stir evenly for 20-30 minutes to obtain solution C; 4) Add solution C to solution B, keep the solution temperature at 40-50℃, then add diethylene glycol butyl ether, stir evenly, add them to emulsion A, mix evenly at 40-50℃, then add sodium petroleum sulfonate, Tween, and Span in sequence, stir evenly for 20-30 minutes, and obtain cutting fluid mother liquor; Imidazole ionic liquid is added to the cutting fluid mother liquid, and then the cutting fluid mother liquid is diluted with water to obtain a white emulsion, which is the water-based lubricating cutting fluid.

2. The heavy-duty water-based lubricating cutting fluid containing ionic liquid according to claim 1, characterized in that: The pH value of the cutting fluid is 8.0-10.

0.

3. The heavy-duty water-based lubricating cutting fluid containing ionic liquid according to claim 1, characterized in that: The synthetic ester is pentaerythritol oleate and trimethylolpropane oleate; the mass ratio of pentaerythritol oleate to trimethylolpropane oleate is 1:(1-10).

4. The heavy-duty water-based lubricating cutting fluid containing ionic liquid according to claim 1, characterized in that: The defoaming agent brand is Mengqingxin MS575.

5. The heavy-duty water-based lubricating cutting fluid containing ionic liquid according to claim 1, characterized in that: The amount of imidazole ionic liquid added is 3-18wt% of the cutting fluid mother liquid.

6. Use of the heavy-duty water-based lubricating cutting fluid containing ionic liquid according to any one of claims 1 to 5 in a metal cutting or grinding process.

Images