Aluminum alloy cutting fluid and preparation method thereof

Abstract

The application belongs to the field of metal processing, and particularly relates to an aluminum alloy cutting fluid and a preparation method thereof. The aluminum alloy cutting fluid is prepared from the following raw materials in a proportion by weight: compounded extreme pressure lubricant 4%-6%, compounded antirust agent 3%-5%, compounded aluminum corrosion inhibitor 2%-4%, bactericide 2%-3%, pH regulator 4%-7%, defoaming agent 0.2%-0.4%, hard water resisting agent 1%-3%, and deionized water 71.6%-83.8%. The aluminum alloy cutting fluid has the outstanding feature of excellent lubricity, and can generate wear-resistant metal compounds on the friction surface between the cutting metal and the cutter under the high-temperature and high-pressure cutting environment, so as to protect the cutter and improve the quality of the machining surface. Meanwhile, the aluminum alloy cutting fluid has excellent corrosion inhibition performance.

Description

Technical Field

[0001] This invention belongs to the field of metal processing, specifically relating to an aluminum alloy cutting fluid and its preparation method. Background Technology

[0002] Aluminum alloys possess characteristics such as low density, light weight, high specific strength, and high electrical and thermal conductivity, along with excellent machinability, making them widely used in machining industries such as aerospace, automotive, petrochemical, and electronics and telecommunications. However, due to their softness, high plasticity, and tendency to stick to the cutting tool during machining, built-up edge can form. At high speeds, this can lead to welding on the cutting edge, affecting machining accuracy and surface roughness. The cut surface is also prone to oxidation, discoloration, and black spots, significantly impacting production efficiency.

[0003] The corrosion of aluminum alloys during processing is complex, mainly due to two factors. First, aluminum is highly chemically reactive and an amphoteric metal, making it prone to corrosion. Cutting fluids are alkaline solutions; in alkaline media, the oxide film on the aluminum surface dissolves, exposing the internal metal for further corrosion. Second, impurities during the cutting process and certain high-potential alloying elements in the aluminum alloy can lead to electrochemical corrosion. High-strength aluminum alloys, such as 2024, 2A14, 3003, 6063, and 7A04, contain high levels of zinc, copper, magnesium, manganese, and silicon. While these alloying elements increase the strength of the aluminum alloy, they also make the material highly susceptible to corrosion from harmful media such as chlorides, sulfides, and carbonates in the environment, easily leading to pitting corrosion, exfoliation corrosion, intergranular corrosion, and microbial corrosion.

[0004] Traditional aluminum alloy cutting methods mostly utilize cutting oils and emulsified oils, but both have drawbacks: cutting oils have poor cooling effects and easily generate fumes and severely pollute the environment under high-speed, heavy-duty cutting conditions; emulsified oils have poor working fluid stability, short service life, and are prone to mold and foul odor. Currently available aluminum alloy cutting fluids generally suffer from insufficient lubrication and weak corrosion inhibition. Water-based synthetic cutting fluids, with their excellent cooling, cleaning, and rust-preventing properties and long service life, have become a focus of recent research both domestically and internationally. Summary of the Invention

[0005] The purpose of this invention is to provide an aluminum alloy cutting fluid to overcome the shortcomings of existing aluminum alloy cutting fluids, such as insufficient lubrication performance and weak corrosion inhibition performance during high-speed, high-feed cutting.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An aluminum alloy cutting fluid comprises the following components by mass percentage: 4%-6% compound extreme pressure lubricant, 3%-5% compound rust inhibitor, 2%-4% compound aluminum corrosion inhibitor, 2%-3% bactericide, 4%-7% pH adjuster, 0.2%-0.4% defoamer, 1%-3% anti-hard water agent, and the balance being deionized water.

[0008] Preferably, the compound extreme pressure lubricant is composed of triethanolamine borate ester and triethanolamine oleate mixed in a mass ratio of 1:4.

[0009] Preferably, the compound rust inhibitor is composed of sodium silicate, sodium molybdate and dodecenylsuccinic acid mixed in a mass ratio of 1:1:2.

[0010] Preferably, the compound aluminum corrosion inhibitor is composed of nonylphenol polyoxyethylene ether phosphate and imidazoline amide mixed in a mass ratio of 1:1.

[0011] Preferably, the bactericide is tritium dibromopropionamide.

[0012] Preferably, the pH adjuster is triethanolamine.

[0013] Preferably, the defoamer is polymethylsiloxane.

[0014] Preferably, the anti-hard water agent is sodium C12 fatty alcohol polyoxyethylene ether carboxylate.

[0015] The method for preparing the aluminum alloy cutting fluid of the present invention includes the following steps: adding compound extreme pressure lubricant, compound rust inhibitor, compound aluminum corrosion inhibitor, and bactericide sequentially to deionized water, mixing and stirring evenly, heating and maintaining the temperature at 50℃±1℃ to make the solution clear and transparent, then adding defoamer and anti-hard water agent, and finally adding pH adjuster to adjust the overall pH value of the solution to 8.5~9.0, and continuing to stir until the solution is clear and transparent, thus obtaining the fully synthetic aluminum alloy cutting fluid.

[0016] Compared with the prior art, the beneficial effects of the present invention are reflected in:

[0017] This invention provides a cutting fluid for aluminum alloy cutting. The main components of its extreme pressure lubricant contain a large number of reactive groups such as N and B. Under high temperature and high load conditions, these groups generate wear-resistant metallic compounds on the friction surface between the metal and the cutting tool, increasing cutting speed and feed rate. It also exhibits good corrosion inhibition and readily forms a uniform film on the metal surface to prevent oxidation reactions between the metal and corrosive media. The aluminum alloy cutting fluid of this invention extends tool life, reduces cutting forces, improves machining accuracy, and prevents corrosion of metal workpieces during metal processing or forming. Detailed Implementation

[0018] The preferred embodiments of the present invention will now be described in detail with reference to specific examples. It should be understood that the following examples are given for illustrative purposes only and are not intended to limit the scope of the invention. Those skilled in the art can make various modifications and substitutions to the present invention without departing from its spirit and essence.

[0019] Unless otherwise specified, all materials and reagents used in the following embodiments are commercially available.

[0020] The preparation methods of the aluminum alloy cutting fluid in the following examples and comparative examples are as follows: In deionized water, a compound extreme pressure lubricant, a compound rust inhibitor, a compound aluminum corrosion inhibitor, and a bactericide are added sequentially and mixed evenly. The mixture is heated and kept at 50℃±1℃ until the solution is clear and transparent. Then, an antifoaming agent and an anti-hard water agent are added. Finally, a pH adjuster is added to adjust the overall pH value of the solution to 8.5-9.0. The mixture is stirred until the solution is clear and transparent, thus obtaining the fully synthetic aluminum alloy cutting fluid.

[0021] Example 1

[0022] This embodiment provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0023] Example 2

[0024] This embodiment provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1%, imidazoline amide 1%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 77.9%.

[0025] Example 3

[0026] This embodiment provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 2%, imidazoline amide 2%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 75.9%.

[0027] Example 4

[0028] This embodiment provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 0.8%, triethanolamine oleate 3.2%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 77.7%.

[0029] Example 5

[0030] This embodiment provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.2%, triethanolamine oleate 4.8%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 75.7%.

[0031] Example 6

[0032] This embodiment provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 0.75%, sodium molybdate 0.75%, dodecenyl succinic acid 1.5%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 77.7%.

[0033] Example 7

[0034] This embodiment provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.25%, sodium molybdate 1.25%, dodecenyl succinic acid 2.5%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 75.7%.

[0035] Comparative Example 1

[0036] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 0.5%, imidazoline amide 0.5%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 78.9%.

[0037] Comparative Example 2

[0038] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 2.5%, imidazoline amide 2.5%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 74.9%.

[0039] Comparative Example 3

[0040] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 3.8%, dibromotritium propionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0041] Comparative Example 4

[0042] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, imidazoline amide 3.8%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0043] Comparative Example 5

[0044] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1.26%, imidazoline amide 2.54%, dibromotritium propionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0045] Comparative Example 6

[0046] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 2.54%, imidazoline amide 1.26%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0047] Comparative Example 7

[0048] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 0.6%, triethanolamine oleate 2.4%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 78.7%.

[0049] Comparative Example 8

[0050] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.4%, triethanolamine oleate 5.6%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 74.7%.

[0051] Comparative Example 9

[0052] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 5.6%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritium propionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0053] Comparative Example 10

[0054] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: 5.6% triethanolamine oleate, 1.15% sodium silicate, 1.15% sodium molybdate, 2.3% dodecenyl succinic acid, 1.9% nonylphenol polyoxyethylene ether phosphate, 1.9% imidazolinamide, 2.2% dibromotritylpropionamide, 5.2% triethanolamine, 0.3% polymethylsiloxane, 2.2% C12 fatty alcohol polyoxyethylene ether carboxylate, and 76.1% deionized water.

[0055] Comparative Example 11

[0056] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 2.8%, triethanolamine oleate 2.8%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0057] Comparative Example 12

[0058] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.86%, triethanolamine oleate 3.74%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0059] Comparative Example 13

[0060] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.4%, triethanolamine oleate 4.2%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0061] Comparative Example 14

[0062] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 0.93%, triethanolamine oleate 3.27%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritium propionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0063] Comparative Example 15

[0064] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 0.5%, sodium molybdate 0.5%, dodecenyl succinic acid 1%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 78.7%.

[0065] Comparative Example 16

[0066] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.5%, sodium molybdate 1.5%, dodecenyl succinic acid 3%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 74.7%.

[0067] Comparative Example 17

[0068] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 4.6%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritium propionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0069] Comparative Example 18

[0070] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium molybdate 4.6%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritium propionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0071] Comparative Example 19

[0072] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, dodecenyl succinic acid 4.6%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritium propionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0073] Comparative Example 20

[0074] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.53%, sodium molybdate 1.53%, dodecenyl succinic acid 1.53%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritium propionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.11%.

[0075] Comparative Example 21

[0076] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 2.3%, sodium molybdate 1.15%, dodecenyl succinic acid 1.15%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritium propionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0077] Comparative Example 22

[0078] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.15%, sodium molybdate 2.3%, dodecenyl succinic acid 1.15%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0079] Comparative Example 23

[0080] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 2.76%, sodium molybdate 0.92%, dodecenyl succinic acid 0.92%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritium propionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0081] Comparative Example 24

[0082] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 0.92%, sodium molybdate 2.76%, dodecenyl succinic acid 0.92%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0083] Comparative Example 25

[0084] This comparative example provides an aluminum alloy cutting fluid, the composition of which by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 0.92%, sodium molybdate 0.92%, dodecenyl succinic acid 2.76%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritylpropionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0085] Conclusion: After multiple comparative experiments, the optimal component ratio of the aluminum alloy cutting fluid was obtained. The composition of each component by mass percentage is as follows: triethanolamine borate 1.12%, triethanolamine oleate 4.48%, sodium silicate 1.15%, sodium molybdate 1.15%, dodecenyl succinic acid 2.3%, nonylphenol polyoxyethylene ether phosphate 1.9%, imidazoline amide 1.9%, dibromotritium propionamide 2.2%, triethanolamine 5.2%, polymethylsiloxane 0.3%, C12 fatty alcohol polyoxyethylene ether carboxylate sodium 2.2%, and deionized water 76.1%.

[0086] The methods for testing the performance of aluminum alloy cutting fluids obtained from the above embodiments and comparative examples are as follows:

[0087] Corrosion inhibition performance testing method: According to section 5.6 of GB / T 6144-2010 Test Method for Synthetic Cutting Fluids, corrosion test, 5% aluminum alloy cutting fluid was placed in 5 beakers. Then, 5 groups of treated aluminum alloy test pieces (2024, 2A14, 3003, 6063, 7A04) were slowly placed into different beakers. Glass lids were then placed on the beakers, and the temperature was raised to 55℃±2℃. The samples were then immersed at this constant temperature for 8 hours and the surface condition of the test pieces was observed. The results are shown in Table 1.

[0088] Rust prevention performance testing method: A 5% concentration of the test aluminum alloy cutting fluid was placed in a beaker. Treated cast iron sheets were then slowly placed into different beakers, covered with glass lids, and heated to 55℃±2℃. The samples were then immersed at this constant temperature for 24 hours. The surface condition of the samples was observed. The rust prevention test was performed according to section 5.7 of GB / T 6144-2010, Test Method for Synthetic Cutting Fluids, focusing on single-sheet and stacked-sheet rust prevention. The results are shown in Table 2.

[0089] Lubrication performance testing method: The lubricity of aluminum alloy cutting fluid was tested using a BOOST-BSV05 tapping torque meter to obtain tapping torque test data. The results are shown in Table 3.

[0090] Table 1 Comparison of Corrosion Inhibition Performance Test Results of Aluminum Alloy Cutting Fluids

[0091] Example 1 Grade A Grade A Grade A Grade A Grade A Example 2 Grade A Grade A Grade A Grade A Grade A Example 3 Grade A Grade A Grade A Grade A Grade A Comparative Example 1 Grade B Class D Grade B Class C Grade A Comparative Example 2 Class C Class C Grade A Grade B Grade B Comparative Example 3 Class D Grade A Class D Grade B Class D Comparative Example 4 Class C Grade B Class D Grade A Class C Comparative Example 5 Grade A Grade B Grade B Class C Grade A Comparative Example 6 Grade B Grade B Grade A Class C Grade A

[0092] As shown in Table 1, the compound aluminum corrosion inhibitor in the aluminum alloy cutting fluid provided by the present invention, when the effective concentration range (mass fraction) is 2% to 4%, and nonylphenol polyoxyethylene ether phosphate and imidazoline amide are mixed in a mass ratio of 1:1, has a significant corrosion inhibition effect on the aluminum alloy surface, thereby greatly improving the corrosion resistance of aluminum alloy in cutting processing.

[0093] Table 2 Comparison Test Results of Cutting and Rust Prevention Performance of Aluminum Alloys

[0094]

[0095]

[0096] As shown in Table 2, the compound rust inhibitor in the aluminum alloy cutting fluid provided by the present invention, when the effective concentration range (mass fraction) is 3% to 5%, and sodium silicate, sodium molybdate and dodecenyl succinic acid are mixed in a mass ratio of 1:1:2, has a significant anti-corrosion effect on cast iron, thereby protecting machine tools during cutting.

[0097] Table 3 Comparison of Tapping Torque Test Results for Aluminum Alloy Cutting Fluid

[0098]

[0099] Table 3 shows that when the extreme pressure lubricant in the aluminum alloy cutting fluid provided by the present invention is within the effective concentration range (mass fraction) of 3% to 7%, and is composed of triethanolamine borate and triethanolamine oleate mixed at a mass ratio of 1:4, the average torque obtained during the tapping torque test is small and the lubricity is good, proving that the compound extreme pressure lubricant can improve its lubricity.

[0100] It should be noted that the above embodiments are only for explaining the present invention and do not constitute any limitation on the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory terms, not limiting terms. Modifications can be made to the present invention within the scope of the claims, and revisions can be made to the present invention without departing from the scope and spirit of the present invention. Although the present invention described herein relates to specific methods, materials, and embodiments, it does not mean that the present invention is limited to the specific examples disclosed herein; on the contrary, the present invention can be extended to all other methods and applications with the same function.

Claims

1. An aluminum alloy cutting fluid, characterized in that, It consists of the following components by mass percentage: compound extreme pressure lubricant 4%-6%, compound rust inhibitor 3%-5%, compound aluminum corrosion inhibitor 2%-4%, bactericide 2%-3%, pH adjuster 4%-7%, defoamer 0.2%-0.4%, anti-hard water agent 1%-3%, and the balance is deionized water; The compound extreme pressure lubricant is composed of triethanolamine borate and triethanolamine oleate in a mass ratio of 1:4; the compound rust inhibitor is composed of sodium silicate, sodium molybdate and dodecenyl succinic acid in a mass ratio of 1:1:2; the compound aluminum corrosion inhibitor is composed of nonylphenol polyoxyethylene ether phosphate and imidazoline amide in a mass ratio of 1:

1.

2. The aluminum alloy cutting fluid according to claim 1, characterized in that, The bactericide is dibromotritylpropionamide.

3. The aluminum alloy cutting fluid according to claim 1, characterized in that, The pH adjuster is triethanolamine.

4. The aluminum alloy cutting fluid according to claim 1, characterized in that, The defoamer is polymethylsiloxane.

5. The aluminum alloy cutting fluid according to claim 1, characterized in that, The anti-hard water agent is sodium C12 fatty alcohol polyoxyethylene ether carboxylate.

6. A method for preparing the aluminum alloy cutting fluid according to any one of claims 1 to 5, characterized in that, The process includes the following steps: In deionized water, add compound extreme pressure lubricant, compound rust inhibitor, compound aluminum corrosion inhibitor, and bactericide in sequence, mix and stir evenly, heat and maintain the temperature at 50℃±1℃ to make the solution clear and transparent, then add defoamer and anti-hard water agent, and finally add pH adjuster to adjust the overall pH value of the solution to 8.5~9.0, and continue stirring until the solution is clear and transparent to obtain aluminum alloy cutting fluid.

Images