Environmentally friendly sawing fluid with excellent surface properties and preparation method thereof

Abstract

The present invention relates to the technical field of non-ferrous metal processing, and in particular to an environmentally friendly sawing liquid with excellent surface properties and a preparation method thereof. The sawing liquid comprises, by weight, 35-65 parts of trimethylolpropane stearate, 30-60 parts of oil-soluble polyalkylene oxide, 0.05-3 parts of antioxidant, 0.1-3 parts of anti-wear agent, and 0.02-0.1 parts of non-ferrous metal corrosion inhibitor. The weight ratio of the trimethylolpropane stearate to the oil-soluble polyalkylene oxide is (1-3):1. The sawing liquid can ensure metal processing accuracy and surface quality of sawing sections; protect saw blades and extend service life; reduce the amount of sawing liquid used and reduce use costs; keep cut aluminum chips dry and pollution-free for easy handling; and have biodegradability to protect the health of operators at the work site.

Description

Technical Field

[0001] The invention relates to an environmentally friendly sawing liquid with excellent surface performance and a preparation method thereof, belonging to the technical field of nonferrous metal processing. Background Art

[0002] Aluminum has the advantages of low density, good ductility, corrosion resistance, easy processing, easy recycling and good economy. Various aluminum alloys are widely used in many fields such as automobiles, aerospace, transportation, electronics, electricity, new energy, food packaging, construction engineering, etc.

[0003] After the melting and casting process, aluminum alloy ingots and round ingots of various specifications can be cast, and then various products such as plates, strips, foils, tubes, and profiles can be produced. In the aluminum processing link, in most cases, it is necessary to saw the ingots and round ingots, mostly using circular saws and band saws to saw flat materials, square materials, round ingots, tubes, and profiles. The sawing process requires processing accuracy and surface quality of the sawed section; protecting the saw blade; extending the service life; reducing the amount of sawing fluid; reducing the cost of use; and keeping the cut aluminum chips dry and pollution-free for easy handling; biodegradable to protect the health of operators at the work site.

[0004] The sawing fluids currently on the market, including products formulated with mineral oil, synthetic oil, and vegetable oil, cannot fully meet the above requirements. Some products have low flash points, high consumption during sawing operations, large amounts of smoke, heavy odor, and polluting the working environment; some have insufficient cooling and lubrication performance, resulting in serious wear and tear of saw blades and saw bands, poor sawing surface quality, and a lot of sawdust; some corrode sawing surfaces; and some have poor annealing cleanliness, affecting the subsequent processing technology and product quality. For example, Chinese patent application CN114752428A discloses a chlorine-free stainless steel sawing oil and a preparation method thereof, which solves the problem of high chlorine content in the prior art and has good lubrication and cooling properties through reasonable ratio conditions. However, it still cannot meet the specific requirements of keeping the cut aluminum chips dry and pollution-free and biodegradable during use. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an environmentally friendly sawing fluid with excellent surface properties and a preparation method thereof, wherein the sawing fluid can ensure metal processing accuracy and the surface quality of the sawed section; protect the saw blade and extend its service life; reduce the amount of sawing fluid used and reduce the cost of use; and at the same time keep the cut aluminum chips dry and pollution-free for easy disposal; and have biodegradability to protect the health of operators at the work site.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: an environmentally friendly sawing fluid with excellent surface properties, the sawing fluid comprising trimethylolpropane stearate, oil-soluble polyalkylene oxide, antioxidant, anti-wear agent, and non-ferrous metal corrosion inhibitor.

[0007] Furthermore, the sawing fluid includes, by weight, 50-65 parts of trimethylolpropane stearate, 30-45 parts of oil-soluble polyalkylene oxide, 0.05-3 parts of antioxidant, 0.1-3 parts of anti-wear agent, and 0.02-0.1 parts of non-ferrous metal corrosion inhibitor.

[0008] Furthermore, the weight ratio of the trimethylolpropane stearate to the oil-soluble polyalkylene oxide is (1-3):1.

[0009] Furthermore, the trimethylolpropane stearate is at least one of trimethylolpropane triisostearate, trimethylolpropane diisostearate monooleate and trimethylolpropane monoisostearate dioleate.

[0010] Furthermore, the oil-soluble polyalkylene oxide is at least one of a propylene oxide polymer, a butylene oxide polymer, and a polymer of propylene oxide and butylene oxide starting with a long-chain alcohol.

[0011] Furthermore, the antioxidant is at least one of a high molecular weight phenol antioxidant, an alkylated aniline antioxidant, a phosphite antioxidant, an amine antioxidant and a mixed solution of a high molecular weight phenol antioxidant.

[0012] Furthermore, the anti-wear agent is at least one of a phosphate friction reducer, a thiophosphate friction reducer, a polymer polyester friction reducer, and a phosphate amine friction reducer.

[0013] Preferably, the anti-wear agent is a combination of a phosphorus-containing friction reducer and a high molecular weight polyester friction reducer.

[0014] Furthermore, the non-ferrous metal corrosion inhibitor is at least one of a benzotriazole corrosion inhibitor, a methylbenzotriazole corrosion inhibitor, a thiadiazole corrosion inhibitor, and a succinic acid half ester corrosion inhibitor.

[0015] The present invention also discloses a method for preparing an environmentally friendly sawing fluid with excellent surface properties, the preparation method comprising:

[0016] S1. Add trimethylolpropane stearate, antioxidant, antiwear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 30-50°C and stir evenly;

[0017] S2, continue stirring, maintain the temperature at 30-50°C, add oil-soluble polyalkylene oxide, and continue stirring until the mixture is uniform;

[0018] S3, after stirring and cooling to room temperature, filtering with a filter bag with a filtration pore size not greater than 5 μm to obtain the environmentally friendly sawing liquid.

[0019] The beneficial effects of the present invention are:

[0020] The sawing fluid of the present invention can ensure metal processing accuracy and surface quality of sawing sections; protect saw blades and extend service life; reduce the amount of sawing fluid used and reduce use costs; and keep cut aluminum chips dry and pollution-free for easy disposal; and is biodegradable and protects the health of operators at the work site.

[0021] The present invention develops an environmentally friendly high-performance sawing fluid made of green and environmentally friendly components with a high biodegradability rate, which can form a variety of viscosity combinations and is used for sawing aluminum alloys, titanium alloys, yellow alloys, medium and low alloy steels, and cast irons. It can also be used for general metal processing, broaching, drilling, threading, and gear processing.

[0022] The trimethylolpropane stearate used in the sawing fluid of the present invention has the characteristics of good low temperature performance, strong antioxidant ability and good lubrication performance, and there is a strong hydrogen bond in the isostearic acid molecule, so that its saturated vapor pressure is very low, and the corresponding boiling point is very high. The boiling point of isostearic acid under normal pressure is above 300°C, so its high temperature performance is also very outstanding. The trimethylolpropane isostearate has low pour point and condensation point, a wide range of use temperature, strong thermal stability and antioxidant ability, low evaporation loss, high viscosity index, strong viscosity-temperature characteristics, and high biodegradation rate. It can provide excellent lubrication in the aluminum ingot casting process, provide excellent wetting spreadability and permeability, improve wear resistance, and have high flash point, low oil smoke, low coking tendency, ensure the surface quality of aluminum processing, improve processing efficiency, and effectively control on-site oil smoke, reduce VOC emissions, optimize on-site working environment, and reduce the harm of the working environment to workers. The extremely high biodegradation rate can greatly reduce pollution, alleviate the environmental pressure of aluminum plants, and reduce carbon emissions. The oil-soluble polyalkylene oxide will not undergo free radical chain growth reaction at high temperature, and will not form polymerization products such as sludge, coking, and paint film. At high temperature, polyalkylene oxide polymers degrade into small molecular products as CC bonds and CO bonds are randomly exercised. However, most polyalkylene oxide compounds have the disadvantage of weak oil solubility, while alkylene oxide compounds polymerized by long-chain alcohols have good oil solubility and good compatibility with hydrocarbon compounds and ester compounds. Therefore, this type of oil-soluble polyalkylene oxide is a good medium for non-ferrous metal sawing. Its unique thermal degradation performance can achieve complete stain-free sawing surface, especially for the processing surface of non-ferrous metals such as aluminum and aluminum alloys, copper and copper alloys, magnesium and magnesium alloys with high metal activity. The present invention selects trimethylolpropane stearate and oil-soluble polyalkylene oxide as a base oil combination, and the two are used in combination and matched with a suitable dosage ratio, so that the final sawing fluid takes into account both the high temperature performance of trimethylolpropane stearate and the cleaning performance of the oil-soluble polyalkylene oxide, which can not only ensure the surface quality of the processed surface, but also control oil smoke and reduce consumption. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is described in detail below. The present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used are only for describing specific embodiments and are not intended to limit the present invention.

[0025] The invention discloses an environmentally friendly sawing fluid with excellent surface performance. The sawing fluid comprises trimethylolpropane stearate, oil-soluble polyalkylene oxide, an antioxidant, an anti-wear agent and a non-ferrous metal corrosion inhibitor.

[0026] Specifically, in parts by weight, the sawing fluid includes 50-65 parts of trimethylolpropane stearate, 30-45 parts of oil-soluble polyalkylene oxide, 0.05-3 parts of antioxidant, 0.1-3 parts of anti-wear agent, and 0.02-0.1 parts of non-ferrous metal corrosion inhibitor.

[0027] Specifically, the weight ratio of the trimethylolpropane stearate to the oil-soluble polyalkylene oxide is (1-3):1.

[0028] Specifically, the trimethylolpropane stearate is at least one of trimethylolpropane triisostearate, trimethylolpropane diisostearate monooleate and trimethylolpropane monoisostearate dioleate.

[0029] Preferably, the trimethylolpropane stearate is trimethylolpropane triisostearate.

[0030] Specifically, the oil-soluble polyalkylene oxide is at least one of a propylene oxide polymer, a butylene oxide polymer, and a polymer of propylene oxide and butylene oxide starting with a long-chain alcohol.

[0031] Preferably, the oil-soluble polyalkylene oxide is selected from OSP 32, OSP46, OSP68, OSP100, OSP150, OSP220, OSP320, OSP460, OSP680 produced by Dow Company; or MARLOWET T 32VG, MARLOWET T 46VG, MARLOWET T 68VG, MARLOWET T 220VG produced by Sasol.

[0032] Specifically, the antioxidant is at least one of a high molecular weight phenol antioxidant, an alkylated aniline antioxidant, a phosphite antioxidant, an amine antioxidant and a mixed solution of a high molecular weight phenol antioxidant.

[0033] Preferably, the antioxidant is selected from at least one of Irganox L57, Irganox L67, Irganox L135, Irganox L64, Irganox L115, BHT, Irganox L168, VANLUBE 961, VANLUBE 407, and VANLUBE BHC.

[0034] Specifically, the anti-wear agent is at least one of a phosphate friction reducer, a thiophosphate friction reducer, a polymer polyester friction reducer, and a phosphate amine friction reducer.

[0035] Preferably, the anti-wear agent is selected from at least one of RC3760, Irganox TPPT, Irganox 232, Irganox 349, VANLUBE829, Synative ES 1200, Synative ES 3100, Synative ES 3103, T306, and T304.

[0036] More preferably, the anti-wear agent is a combination of a phosphorus-containing friction reducer and a high molecular weight polyester friction reducer, wherein the phosphorus-containing friction reducer is selected from phosphate friction reducers, thiophosphate friction reducers, and phosphoamine friction reducers.

[0037] Specifically, the non-ferrous metal corrosion inhibitor is at least one of a methylbenzotriazole corrosion inhibitor, a thiadiazole corrosion inhibitor, a succinic acid half ester corrosion inhibitor, an oleoyl sarcosine corrosion inhibitor, and an imidazoline corrosion inhibitor.

[0038] Preferably, the non-ferrous metal corrosion inhibitor is selected from at least one of Irgacor L 12, Irgamet 39, Sarkosyl O, AmineO, CUVAN484, CUVAN 826, T551, and T552.

[0039] A method for preparing an environmentally friendly sawing fluid with excellent surface properties, characterized in that the preparation method comprises:

[0040] S1. Add trimethylolpropane stearate, antioxidant, antiwear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 30-50°C and stir evenly;

[0041] S2, continue stirring, maintain the temperature at 30-50°C, add oil-soluble polyalkylene oxide, and continue stirring until the mixture is uniform;

[0042] S3, after stirring and cooling to room temperature, filtering with a filter bag with a filtration pore size not greater than 5 μm to obtain the environmentally friendly sawing liquid.

[0043] Example 1

[0044] The sawing fluid was prepared according to the formulation in Table 1.

[0045] Table 1 Formula composition of Example 1

[0046]

[0047] The preparation method is:

[0048] S1. Add trimethylolpropane stearate, antioxidant, antiwear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 40°C and stir evenly;

[0049] S2, continue stirring, keep the temperature at 40°C, add oil-soluble polyalkylene oxide, and continue stirring until the mixture is uniform;

[0050] S3, after stirring and cooling to room temperature, filtering with a filter bag with a filtration pore size not greater than 5 μm to obtain the environmentally friendly sawing liquid.

[0051] Example 2

[0052] The sawing fluid was prepared according to the formulation in Table 2.

[0053] Table 2 Formula composition of Example 2

[0054]

[0055] The preparation method is:

[0056] S1. Add trimethylolpropane stearate, antioxidant, anti-wear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 30°C and stir evenly;

[0057] S2, continue stirring, keep the temperature at 30°C, add oil-soluble polyalkylene oxide, and continue stirring until the mixture is uniform;

[0058] S3, after stirring and cooling to room temperature, filtering with a filter bag with a filtration pore size not greater than 5 μm to obtain the environmentally friendly sawing liquid.

[0059] Example 3

[0060] The sawing fluid was prepared according to the formulation in Table 3.

[0061] Table 3 Formula composition of Example 3

[0062]

[0063] The preparation method is:

[0064] S1. Add trimethylolpropane stearate, antioxidant, anti-wear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 50°C and stir evenly;

[0065] S2, continue stirring, keep the temperature at 50°C, add oil-soluble polyalkylene oxide, and continue stirring until the mixture is uniform;

[0066] S3, after stirring and cooling to room temperature, filtering with a filter bag with a filtration pore size not greater than 5 μm to obtain the environmentally friendly sawing liquid.

[0067] Example 4

[0068] The sawing fluid was prepared according to the formulation in Table 4.

[0069] Table 4 Formula composition of Example 4

[0070]

[0071] The preparation method is:

[0072] S1. Add trimethylolpropane stearate, antioxidant, antiwear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 40°C and stir evenly;

[0073] S2, continue stirring, keep the temperature at 40°C, add oil-soluble polyalkylene oxide, and continue stirring until the mixture is uniform;

[0074] S3, after stirring and cooling to room temperature, filtering with a filter bag with a filtration pore size not greater than 5 μm to obtain the environmentally friendly sawing liquid.

[0075] Example 5

[0076] The sawing fluid was prepared according to the formulation in Table 5.

[0077] Table 5 Formula composition of Example 5

[0078]

[0079] The preparation method is:

[0080] S1. Add trimethylolpropane stearate, antioxidant, antiwear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 40°C and stir evenly;

[0081] S2, continue stirring, keep the temperature at 40°C, add oil-soluble polyalkylene oxide, and continue stirring until the mixture is uniform;

[0082] S3, after stirring and cooling to room temperature, filtering with a filter bag with a filtration pore size not greater than 5 μm to obtain the environmentally friendly sawing liquid.

[0083] Example 6

[0084] The sawing fluid was prepared according to the formulation in Table 6.

[0085] Table 6 Formula composition of Example 6

[0086]

[0087] The preparation method is:

[0088] S1. Add trimethylolpropane stearate, antioxidant, antiwear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 40°C and stir evenly;

[0089] S2, continue stirring, keep the temperature at 40°C, add oil-soluble polyalkylene oxide, and continue stirring until the mixture is uniform;

[0090] S3, after stirring and cooling to room temperature, filtering with a filter bag with a filtration pore size not greater than 5 μm to obtain the environmentally friendly sawing liquid.

[0091] Example 7

[0092] The sawing fluid was prepared according to the formulation in Table 7.

[0093] Table 7 Formula composition of Example 7

[0094]

[0095] The preparation method is:

[0096] S1. Add trimethylolpropane stearate, antioxidant, antiwear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 40°C and stir evenly;

[0097] S2, continue stirring, keep the temperature at 40°C, add oil-soluble polyalkylene oxide, and continue stirring until the mixture is uniform;

[0098] S3, after stirring and cooling to room temperature, filtering with a filter bag with a filtration pore size not greater than 5 μm to obtain the environmentally friendly sawing liquid.

[0099] Comparative Example 1

[0100] The sawing fluid was prepared by the same method as in Example 1, except that trimethylolpropane stearate was not added. The specific formula composition is shown in Table 8 below.

[0101] Table 8 Formula composition of comparative example 1

[0102]

[0103] The preparation method is:

[0104] S1. Add oil-soluble polyalkylene oxide, antioxidant, anti-wear agent and non-ferrous metal corrosion inhibitor into the blending kettle, control the temperature at 40°C and stir evenly;

[0105] S2. After stirring and cooling to room temperature, filtering is performed using a filter bag with a filtration pore size of no more than 5 μm to obtain the environmentally friendly sawing liquid.

[0106] Comparative Example 2

[0107] The sawing fluid was prepared by the same method as in Example 1, except that no oil-soluble polyalkylene oxide was added. The specific formula composition is shown in Table 9 below.

[0108] Table 9 Formula composition of comparative example 2

[0109]

[0110] The preparation method is:

[0111] S1. Add trimethylolpropane stearate, antioxidant, antiwear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 40°C and stir evenly;

[0112] S2. After stirring and cooling to room temperature, filtering is performed using a filter bag with a filtration pore size of no more than 5 μm to obtain the environmentally friendly sawing liquid.

[0113] Comparative Example 3

[0114] The sawing fluid was prepared by the same method as in Example 1, except that the added amounts of trimethylolpropane stearate and oil-soluble polyalkylene oxide were adjusted so that the weight ratio of trimethylolpropane stearate to synthetic saturated oil-soluble polyalkylene oxide was 5.3:1 (not within the scope of the present invention). The specific formula composition is shown in Table 10 below.

[0115] Table 10 Formula composition of comparative example 3

[0116]

[0117] The preparation method is:

[0118] S1. Add trimethylolpropane stearate, antioxidant, antiwear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 40°C and stir evenly;

[0119] S2, continue stirring, keep the temperature at 40°C, add oil-soluble polyalkylene oxide, and continue stirring until the mixture is uniform;

[0120] S3, after stirring and cooling to room temperature, filtering with a filter bag with a filtration pore size not greater than 5 μm to obtain the environmentally friendly sawing liquid.

[0121] Comparative Example 4

[0122] The sawing fluid was prepared by the same method as in Example 1, except that the added amounts of trimethylolpropane stearate and oil-soluble polyalkylene oxide were adjusted so that the weight ratio of trimethylolpropane stearate to synthetic saturated oil-soluble polyalkylene oxide was 0.73:1 (not within the scope of the present invention). The specific formula composition is shown in Table 11.

[0123] Table 11 Formula composition of comparative example 4

[0124]

[0125] The preparation method is:

[0126] S1. Add trimethylolpropane stearate, antioxidant, antiwear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 40°C and stir evenly;

[0127] S2, continue stirring, keep the temperature at 40°C, add oil-soluble polyalkylene oxide, and continue stirring until the mixture is uniform;

[0128] S3, after stirring and cooling to room temperature, filtering with a filter bag with a filtration pore size not greater than 5 μm to obtain the environmentally friendly sawing liquid.

[0129] The sawing fluids prepared in the above examples and comparative examples were tested for performance, and the specific test results are shown in Tables 12 and 13. The test methods involved are:

[0130] Kinematic viscosity: GB / T 265;

[0131] Flash point: GB / T 3536;

[0132] Evaporation loss: refer to SH / T 0059, the test time is 1h, 3h and 10h respectively;

[0133] Coking test (crankcase simulation test method): refer to SH / T 0300, oil temperature 180℃, plate temperature 320℃, time 3h;

[0134] Oxidation stability test: DIN 51352-1;

[0135] Maximum no-seizure load PB: ASTM D2783;

[0136] Sintering load PD: ASTM D2596;

[0137] Wear scar diameter (four-ball testing machine): ASTM D2266;

[0138] Copper corrosion: ASTM D130;

[0139] Biodegradation rate: CEC L-33-A-93.

[0140] Table 12 Test data of sawing fluid performance in Examples 1-7

[0141]

[0142] Table 13 Test data of sawing fluid performance in comparative examples 1-4

[0143]

[0144] From the above table data, it can be seen that the sawing fluid prepared by the preparation method of the present invention in Examples 1-7 can ensure metal processing accuracy and the surface quality of the sawing section; protect the saw blade and extend its service life; reduce the amount of sawing fluid used and reduce the cost of use; at the same time, keep the cut aluminum chips dry and pollution-free for easy handling; and have biodegradability to protect the health of operators at the work site. In summary, the environmentally friendly sawing fluid with excellent surface properties and its preparation method provided by the present invention have the following advantages:

[0145] 1. Excellent lubricity and anti-wear properties can ensure metal processing accuracy, protect saw blades and extend service life;

[0146] 2. Low volatility can reduce the amount of sawing fluid used and reduce the cost of use;

[0147] 3. Excellent high temperature oxidation resistance and extremely low coking tendency can ensure the surface quality of the sawn section while keeping the cut aluminum chips dry and pollution-free for easy handling;

[0148] 4. It is biodegradable and protects the health of operators at the work site.

[0149] 5. The sawing fluid developed by the present invention can form a variety of viscosity combinations and is suitable for multi-metal and multi-process processing, including sawing of aluminum alloys, titanium alloys, yellow alloys, medium and low alloy steels, cast iron, etc., and can also be used for general metal processing, broaching, drilling, threading and gear processing.

[0150] In addition, from the comparison of the data of Example 1 and Examples 6-7, it can be seen that if the anti-wear agent is a combination of a phosphorus-containing friction reducer and a polymer polyester friction reducer, the sawing fluid has better extreme pressure and anti-wear properties, because the phosphorus-containing friction reducer has excellent extreme pressure and anti-wear properties, but its wettability needs to be improved; while the polymer polyester friction reducer has excellent wettability, but lacks extreme pressure and anti-wear capabilities. The combination of the two can play a good synergistic role.

[0151] From the data comparison of Example 1 and Comparative Example 1, it can be seen that if trimethylolpropane stearate is not added to the formula composition, the high temperature performance will be reduced, the volatility of the oil will increase significantly, which will lead to an abnormal increase in the amount of sawing fluid used, and a large amount of oil mist will also lead to a deterioration of the working environment.

[0152] From the data comparison of Example 1 and Comparative Example 2, it can be seen that if oil-soluble polyalkylene oxide is not added to the formula composition, the coking amount and antioxidant capacity will decrease, which will affect the surface quality of the processed metal, especially the non-ferrous metal processing operation, and will cause coking and oil spots on the metal surface, affecting the processing quality.

[0153] From the comparison of the data of Example 1 and Comparative Examples 3-4, it can be seen that if the ratio of the amount of oil-soluble polyalkylene oxide to trimethylolpropane stearate in the formula composition is not within the specified range of the present invention, the comprehensive performance will be reduced to varying degrees, including high temperature performance, volatility control, coking control, antioxidant ability, anti-wear ability, etc. Therefore, the combination of oil-soluble polyalkylene oxide and trimethylolpropane stearate in a suitable ratio is more conducive to obtaining a sawing fluid with excellent performance.

[0154] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are exhaustively listed. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0155] For those skilled in the art, several modifications and improvements may be made without departing from the concept of the present invention, all of which belong to the protection scope of the present invention. The protection scope of the present invention shall be based on the attached claims.

Claims

1. An environmentally friendly sawing fluid with excellent surface properties, characterized in that: The sawing fluid comprises trimethylolpropane stearate, oil-soluble polyalkylene oxide, antioxidant, anti-wear agent, and non-ferrous metal corrosion inhibitor; In terms of weight, the sawing fluid comprises 50-65 parts of trimethylolpropane stearate, 30-45 parts of oil-soluble polyalkylene oxide, 0.05-3 parts of antioxidant, 0.1-3 parts of anti-wear agent, and 0.02-0.1 parts of non-ferrous metal corrosion inhibitor; The weight ratio of the trimethylolpropane stearate to the oil-soluble polyalkylene oxide is (1-3): 1; The oil-soluble polyalkylene oxide is at least one of a propylene oxide polymer, a butylene oxide polymer, and a polymer of propylene oxide and butylene oxide starting with a long-chain alcohol.

2. The environmentally friendly sawing fluid with excellent surface properties according to claim 1, characterized in that: The trimethylolpropane stearate is at least one of trimethylolpropane triisostearate, trimethylolpropane diisostearate monooleate and trimethylolpropane monoisostearate dioleate.

3. The environmentally friendly sawing fluid with excellent surface properties according to claim 1, characterized in that: The antioxidant is at least one of a high molecular weight phenol antioxidant, an alkylated aniline antioxidant, a phosphite antioxidant, an amine antioxidant and a mixed solution of a high molecular weight phenol antioxidant.

4. The environmentally friendly sawing fluid with excellent surface properties according to claim 1, characterized in that: The anti-wear agent is at least one of a phosphate friction reducer, a thiophosphate friction reducer, a high molecular weight polyester friction reducer, and a phosphate amine friction reducer.

5. The environmentally friendly sawing fluid with excellent surface properties according to claim 4, characterized in that: The anti-wear agent is a combination of a phosphorus-containing friction reducer and a high molecular weight polyester friction reducer.

6. The environmentally friendly sawing fluid with excellent surface properties according to claim 1, characterized in that: The non-ferrous metal corrosion inhibitor is at least one of a benzotriazole corrosion inhibitor, a methylbenzotriazole corrosion inhibitor, a thiadiazole corrosion inhibitor, and a succinic acid half ester corrosion inhibitor.

7. A method for preparing an environmentally friendly sawing fluid with excellent surface properties according to any one of claims 1 to 6, characterized in that: The preparation method is: S1. Add trimethylolpropane stearate, antioxidant, antiwear agent and non-ferrous metal corrosion inhibitor into a blending kettle, control the temperature at 30-50°C and stir evenly; S2, continue stirring, maintain the temperature at 30-50°C, add oil-soluble polyalkylene oxide, and continue stirring until the mixture is uniform; S3, after stirring and cooling to room temperature, filtering with a filter bag with a filtration pore size not greater than 5 μm to obtain the environmentally friendly sawing liquid.

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