Cold rolling liquid and preparation method and application thereof

Abstract

This invention provides a cold rolling fluid, its preparation method, and its application, relating to the field of rolling fluid technology. The rolling fluid comprises or is prepared from raw materials comprising the following components: 50.0–70.0 parts by weight of boundary lubricant; 14.0–46.0 parts by weight of base oil; 2.0–5.0 parts by weight of extreme pressure anti-wear agent; 1.0–5.0 parts by weight of rust and corrosion inhibitor; 1.0–4.0 parts by weight of surfactant; and 0.0–4.0 parts by weight of antioxidant. The cold rolling fluid of this invention achieves optimal rust prevention and lubrication performance, meeting the stringent requirements of cold rolling of grain-oriented silicon steel. Through the compounding and synergistic effect of its components, the cold rolling fluid of this invention exhibits excellent comprehensive performance and can meet the usage requirements of a 20-roll Sendzimir mill.

Description

Technical Field

[0001] This invention relates to the field of rolling fluid technology, specifically to a cold rolling fluid, its preparation method, and its application. Background Technology

[0002] Silicon steel refers to an extremely low-carbon ferrosilicon alloy with a silicon content of 0.5% to 4.5%. It possesses characteristics such as high magnetic permeability, low coercivity, and high resistivity. Due to differences in structure and application, it is divided into non-oriented silicon steel and oriented silicon steel. Silicon steel is mainly used as the core of various motors, generators, compressors, and transformers, and is an indispensable soft magnetic alloy in the power, electronics, and military industries. Because its manufacturing technology is more stringent than that of ordinary carbon steel products, and its production process is complex and technologically advanced, silicon steel is known as a "work of art among steel products." Oriented silicon steel, in particular, which is even more "advanced" than non-oriented silicon steel, is hailed as the "crown jewel" of the modern steel industry. Therefore, the manufacturing technology and product quality of oriented silicon steel are one of the important indicators for measuring a country's special steel production and technological development level.

[0003] In the cold rolling process of grain-oriented silicon steel sheets, a 20-roll Sendzimir mill is generally used, and rolling fluid is used as a lubricating auxiliary material to lubricate, cool, clean, and prevent rust. With the development of current silicon steel cold rolling technology and the increasingly stringent quality requirements for silicon steel in new energy vehicles, the performance requirements of silicon steel rolling fluids are also increasing. Silicon steel production is more stringent than the cold rolling of ordinary carbon steel, and the material composition of silicon steel differs from that of ordinary carbon steel. Silicon steel also has a high surface finish, making it prone to rusting during storage, leading to product downgrading or even scrapping. Currently, rust prevention during the inter-process storage of silicon steel sheets after cold rolling is a common problem encountered by various enterprises. Therefore, it is still necessary to develop a silicon steel rolling fluid product that meets the current technical requirements for lubrication, cooling, and cleaning in silicon steel cold rolling, while also possessing high rust prevention properties. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a cold rolling fluid, its preparation method and application, to improve the lubricity or rust prevention performance of the rolling fluid.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] In a first aspect, the present invention provides a cold rolling fluid, the rolling fluid comprising the following components or prepared from raw materials comprising the following components:

[0007]

[0008] In one specific embodiment of the present invention, the amount of the boundary lubricant is 55-65 parts by weight.

[0009] In one specific embodiment of the present invention, the amount of the base oil is 18-40 parts by weight.

[0010] In one specific embodiment of the present invention, the extreme pressure anti-wear agent is 3-4.5 parts by weight.

[0011] In one specific embodiment of the present invention, the amount of the rust and corrosion inhibitor is 3-5 parts by weight.

[0012] In one specific embodiment of the present invention, the amount of the surfactant is 2-3.5 parts by weight.

[0013] In one specific embodiment of the present invention, the amount of antioxidant is 0.2-2 parts by weight.

[0014] As a specific embodiment of the present invention, the boundary lubricant includes at least one of palm oil, coconut oil, soybean oil, isooctyl palmitate, trimethylolpropane fatty acid ester, and pentaerythritol fatty acid ester.

[0015] Preferably, the boundary lubricant includes a primary boundary lubricant and a secondary boundary lubricant. The primary boundary lubricant includes at least one of palm oil, coconut oil, and soybean oil. The secondary boundary lubricant includes at least one of isooctyl palmitate, trimethylolpropane fatty acid ester, and pentaerythritol fatty acid ester. The weight ratio of the primary boundary lubricant to the secondary boundary lubricant is (1-8):1, preferably (1.5-6):1.

[0016] Preferably, the cold rolling solution contains: palm oil in an amount of 0-70 parts by weight, preferably 10-60 parts by weight; and / or soybean oil in an amount of 0-70 parts by weight, preferably 10-60 parts by weight, more preferably 10-40 parts by weight; and / or coconut oil in an amount of 0-70 parts by weight, preferably 10-60 parts by weight, more preferably 10-40 parts by weight; and / or pentaerythritol fatty acid ester in an amount of 0-70 parts by weight, preferably 10-60 parts by weight, more preferably 10-30 parts by weight; and / or trimethylolpropane fatty acid ester in an amount of 0-70 parts by weight, preferably 10-60 parts by weight, more preferably 10-30 parts by weight.

[0017] In one specific embodiment of the present invention, the base oil includes at least one of Group I refined mineral oil and Group II hydrotreated mineral oil, or the base oil includes Group I refined mineral oil and Group II hydrotreated mineral oil. Preferably, the kinematic viscosity of the base oil at 40°C is in the range of 30.0–50.0 mm. 2 / s.

[0018] As a specific embodiment of the present invention, the extreme pressure anti-wear agent includes at least one of the following: inactive sulfurized olefins, sulfurized fatty acid esters, sulfurized fatty oil acid phosphate esters, alcohol ether phosphate esters, phosphate ester amine salts, and nitrogen-containing borate esters.

[0019] Preferably, the extreme pressure anti-wear agent comprises a primary extreme pressure anti-wear agent and a secondary extreme pressure anti-wear agent. The primary extreme pressure anti-wear agent comprises at least one of sulfurized fatty acid esters and nitrogen-containing borate esters. The secondary extreme pressure anti-wear agent comprises at least one of acidic phosphate esters, phosphites, and ammonium phosphate salts. The weight ratio of the primary extreme pressure anti-wear agent to the secondary extreme pressure anti-wear agent is (1-8):1, preferably (1-6):1, and more preferably (1.5-3.5):1.

[0020] Preferably, in the cold rolling solution: the amount of sulfurized fatty acid ester is 0-5 parts by weight, preferably 0.5-4 parts by weight; and / or, the amount of nitrogen-containing borate ester is 0-5 parts by weight, preferably 0.5-4 parts by weight, more preferably 0.5-1.5 parts by weight; and / or, the amount of acidic phosphate ester is 0-5 parts by weight, preferably 0.5-4 parts by weight, more preferably 0.5-1.5 parts by weight; and / or, the amount of ammonium phosphate salt is 0-5 parts by weight, preferably 0.5-4 parts by weight, more preferably 0.5-1.5 parts by weight.

[0021] As a specific embodiment of the present invention, the rust and corrosion inhibitor includes at least one of sodium petroleum sulfonate, barium petroleum sulfonate, barium dinonylnaphthalene sulfonate, benzotriazole and its derivatives, thiadiazole and its derivatives, polyethylene polyamine and its derivatives, fatty acid diethanolamine amide, carboxylic acid amine, succinic acid derivatives, dodecenylsuccinic acid, docosahexacarboxylic acid or organic tricarboxylic acid.

[0022] Preferably, the rust and corrosion inhibitor includes a primary rust and corrosion inhibitor and a secondary rust and corrosion inhibitor; the primary rust and corrosion inhibitor includes at least one of polyethylene polyamine, dodecenyl succinic acid, fatty acid diethanolamine amide, benzotriazole and its derivatives, and docosahexadecanoic acid; the secondary rust and corrosion inhibitor includes at least one of sodium petroleum sulfonate and barium dinonylnaphthalene sulfonate; the weight ratio of the primary rust and corrosion inhibitor to the secondary rust and corrosion inhibitor is (1-10):1, preferably (3-8):1, and more preferably (4-7):1.

[0023] Preferably, the cold rolling solution contains: 0-5 parts by weight of polyethylenepolyamine, preferably 0.1-3 parts by weight; and / or 0-5 parts by weight of fatty acid diethanolamine amide, preferably 0.1-3 parts by weight, more preferably 1-2 parts by weight; and / or 0-5 parts by weight of dodecenylsuccinic acid, preferably 0.1-3 parts by weight, more preferably 0.5-1 parts by weight; and / or 0-5 parts by weight of docosahexacarboxylic acid, preferably 0.1-3 parts by weight, more preferably 0.5-1 parts by weight; and / or 0-5 parts by weight of benzotriazole, preferably 0.1-3 parts by weight, more preferably 0.1-0.3 parts by weight; and / or 0-5 parts by weight of sodium petroleum sulfonate, preferably 0.1-3 parts by weight, more preferably 0.5-1 parts by weight.

[0024] As a specific embodiment of the present invention, the surfactant includes at least one of low HLB value alkylphenol polyoxyethylene ether, high HLB value alkylphenol polyoxyethylene ether, alcohol ester type surfactant, polymeric surfactant, fatty alcohol ether carboxylic acid, quaternary ammonium salt type surfactant, and tallow amine polyoxyethylene ether.

[0025] Preferably, the surfactant comprises a primary surfactant and a secondary surfactant; the primary surfactant comprises at least one of low HLB value alkylphenol polyoxyethylene ether, high HLB value alkylphenol polyoxyethylene ether, and polymeric surfactant; the secondary surfactant comprises at least one of tallow amine polyoxyethylene ether and fatty alcohol ether carboxylic acid; and the mass ratio of the primary surfactant to the secondary surfactant is 1:(0.05-1), preferably 1:(0.06-0.5).

[0026] Preferably, in the cold rolling solution: the amount of low HLB value alkylphenol polyoxyethylene ether is 0-4 parts by weight, preferably 0.1-3 parts by weight, more preferably 0.5-1 parts by weight; and / or, the amount of high HLB value alkylphenol polyoxyethylene ether is 0-4 parts by weight, preferably 0.1-3 parts by weight, more preferably 1-2 parts by weight; and / or, the amount of polymeric surfactant is 0-4 parts by weight, preferably 0.1-3 parts by weight, more preferably 0.1-0.5 parts by weight; and / or, the amount of fatty alcohol ether carboxylic acid is 0-4 parts by weight, preferably 0.1-3 parts by weight, more preferably 0.3-0.7 parts by weight; and / or, the amount of tallow amine polyoxyethylene ether is 0-4 parts by weight, preferably 0.1-3 parts by weight, more preferably 0.2-0.5 parts by weight.

[0027] In one specific embodiment of the present invention, the antioxidant is selected from at least one of shielding phenolic antioxidants and amine antioxidants.

[0028] Preferably, in the cold rolling solution: the amount of shielding phenolic antioxidant is 0-4 parts by weight, preferably 0.1-2 parts by weight; and / or, the amount of amine antioxidant is 0-4 parts by weight, preferably 0.1-2 parts by weight.

[0029] Secondly, the present invention provides a method for preparing the cold rolling solution, comprising the following steps:

[0030] S1: Heat and stir the mixture including boundary lubricant and base oil;

[0031] S2: Add extreme pressure anti-wear agent, rust and corrosion inhibitor and antioxidant, heat and stir;

[0032] S3: Add surfactant, heat and stir, cool to obtain the rolling solution.

[0033] Thirdly, the present invention provides an application of the aforementioned cold rolling fluid in the cold rolling process of steel.

[0034] Preferably, the cold rolling fluid is applied in the form of an emulsion.

[0035] More preferably, the emulsion is prepared by diluting the cold rolling solution with demineralized water.

[0036] Preferably, the concentration of the cold rolling solution in the emulsion is 0.5 to 4.5% by weight.

[0037] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0038] A) The cold rolling fluid provided by this invention has good rust prevention, lubrication, cleaning and cooling properties, which meets the current requirements for cold rolling of grain-oriented silicon steel. Compared with commercially available grain-oriented silicon steel rolling fluid, it has better rust prevention properties and meets the rust prevention requirements between processes.

[0039] B) The cold rolling fluid provided by the present invention has excellent performance through the compounding and synergistic combination of its components, especially with good rust prevention and extreme pressure lubrication performance, which can meet the requirements of the cold rolling process of grain-oriented silicon steel.

[0040] C) The cold rolling fluid provided by this invention has comprehensive performance that meets the requirements of rolling process development for rolling fluids. It can be used in industrial applications for lubrication of cold rolling processes in single-stand cold rolling mills and continuous rolling mills for oriented silicon steel, and has achieved good technical results, especially in 20-roll Sendzimir mills. It can also be used in the cold rolling processes of carbon steel and stainless steel. Detailed Implementation

[0041] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0042] In a first aspect, the present invention provides a cold rolling fluid, the rolling fluid comprising the following components or prepared from raw materials comprising the following components:

[0043]

[0044] As a specific embodiment of the present invention, the boundary lubricant is selected from at least one of palm oil, coconut oil, soybean oil, isooctyl palmitate, trimethylolpropane fatty acid ester and pentaerythritol fatty acid ester.

[0045] As a specific embodiment of the present invention, the boundary lubricant includes a primary boundary lubricant and a secondary boundary lubricant. The primary boundary lubricant is selected from at least one of palm oil, coconut oil and soybean oil. The secondary boundary lubricant is selected from at least one of isooctyl palmitate, trimethylolpropane fatty acid ester and pentaerythritol fatty acid ester. The weight ratio of the primary boundary lubricant to the secondary boundary lubricant is (1-8):1.

[0046] As a specific embodiment of the present invention, the weight ratio of the primary boundary lubricant and the secondary boundary lubricant can be 8:1, 7:1, 6:1, 5:1, 4:1, 3:1, 2:1, 1.5:1, 1:1 or a range thereof, preferably (1.5 to 6):1.

[0047] As a specific embodiment of the present invention, the cold rolling fluid contains:

[0048] The amount of palm oil is 0-70 parts by weight, such as 10, 20, 30, 40, 50, 60 parts, etc., preferably 10-60 parts by weight;

[0049] The amount of soybean oil is 0-70 parts by weight, such as 10, 20, 30, 40, 50, 60 parts, preferably 10-60 parts by weight; more preferably 10-40 parts by weight.

[0050] The amount of coconut oil is 0-70 parts by weight, such as 10, 20, 30, 40, 50, 60 parts, preferably 10-60 parts by weight; more preferably 10-40 parts by weight.

[0051] The amount of pentaerythritol fatty acid ester is 0-70 parts by weight, such as 10, 20, 30, 40, 50, 60 parts, preferably 10-60 parts by weight; more preferably 10-30 parts by weight.

[0052] The amount of trimethylolpropane fatty acid ester is 0-70 parts by weight, such as 10, 20, 30, 40, 50, 60 parts, preferably 10-60 parts by weight; more preferably 10-30 parts by weight.

[0053] It should be noted that the sum of the main boundary lubricant and the auxiliary boundary lubricant satisfies 50.0 to 70.0 parts by weight of boundary lubricant included in the cold rolling fluid, and the weight ratio of the main boundary lubricant to the auxiliary boundary lubricant satisfies (1 to 8): 1.

[0054] As a specific embodiment of the present invention, the base oil includes at least one of Group I refined mineral oil and Group II hydrotreated mineral oil, or the base oil includes at least one of a base oil blended from Group I refined mineral oil and Group II hydrotreated mineral oil.

[0055] As a specific embodiment of the present invention, the Class I refined mineral oil is selected from at least one of HVI I 150 and HVI I 350, and the Class II hydrotreated refined mineral oil is selected from at least one of II 6 and II 8.

[0056] In one specific embodiment of the present invention, the kinematic viscosity of the base oil at 40°C is in the range of 30.0–50.0 mm. 2 / s. It should be noted that the amount of Group I refined mineral oil and / or Group II hydrotreated mineral oil used can be determined according to viscosity requirements based on the Arrhenius equation, which calculates the theoretical viscosity value of the blending base oil using internationally accepted viscosity models.

[0057] In one specific embodiment of the present invention, the cold rolling fluid includes three different types of refined mineral oil: a first type I refined mineral oil, a second type I refined mineral oil, a first type II hydrotreated mineral oil, and a second type II hydrotreated mineral oil.

[0058] The amount of the first type I refined mineral oil is 0-46 parts by weight, such as 5, 10, 15, 20, 25, 30, 35, 40, 45 parts, etc., preferably 5-30 parts by weight; more preferably 10-20 parts by weight; the first type I refined mineral oil can be HVI I 150;

[0059] The amount of the second type I refined mineral oil is 0-46 parts by weight, such as 5, 10, 15, 20, 25, 30, 35, 40, 45 parts, etc., preferably 5-30 parts by weight; more preferably 10-30 parts by weight; the second type I refined mineral oil can be HVI I 350;

[0060] The amount of the first type II hydrotreated mineral oil is 0-46 parts by weight, such as 5, 10, 15, 20, 25, 30, 35, 40, 45 parts, etc., preferably 5-30 parts by weight; more preferably 10-30 parts by weight; the first type II hydrotreated mineral oil can be II 6;

[0061] The amount of the second type II hydrotreated mineral oil is 0-46 parts by weight, such as 5, 10, 15, 20, 25, 30, 35, 40, 45 parts, preferably 5-30 parts by weight; more preferably 5-10 parts by weight; the second type II hydrotreated mineral oil can be II8.

[0062] It should be noted that the total amount of the above-mentioned base oil meets the requirement of 14.0 to 46.0 parts by weight of base oil contained in the cold rolling fluid.

[0063] As a specific embodiment of the present invention, the extreme pressure anti-wear agent is selected from one or more of the following: non-active sulfurized olefins, sulfurized fatty acid esters, sulfurized fatty oils, acidic phosphate esters, alcohol ether phosphate esters, phosphites, phosphate ester amine salts, and nitrogen-containing borate esters.

[0064] Specifically, the non-reactive sulfurized olefin is selected from at least one of I30, I35, and RC45.

[0065] Specifically, the sulfurized fatty acid ester is selected from at least one of S11 and G55.

[0066] Specifically, the sulfurized fatty oil is selected from at least one of SB18 and LR11.

[0067] Specifically, the acidic phosphate ester is selected from at least one of TPB and EP360.

[0068] Specifically, the alcohol ether phosphate is selected from at least one of P24 and N24.

[0069] Specifically, the phosphite is selected from at least one of T304 and AD380.

[0070] Specifically, the phosphate ester amine salt is selected from at least one of 438 and 3980.

[0071] Specifically, the nitrogen-containing borate ester is selected from at least one of B92 and B95.

[0072] As a specific embodiment of the present invention, the extreme pressure anti-wear agent is selected from at least two, for example three to four, of sulfurized fatty acid esters, acidic phosphate esters, phosphites, ammonium salts of phosphate esters or nitrogen-containing borate esters.

[0073] As a specific embodiment of the present invention, the extreme pressure anti-wear agent includes a primary extreme pressure anti-wear agent and a secondary extreme pressure anti-wear agent. The primary extreme pressure anti-wear agent is selected from at least one of sulfurized fatty acid esters and nitrogen-containing borate esters. The secondary extreme pressure anti-wear agent is selected from at least one of acidic phosphate esters, phosphites, and ammonium phosphate salts. The weight ratio of the primary extreme pressure anti-wear agent to the secondary extreme pressure anti-wear agent is (1-8):1, preferably (1-6):1, and more preferably (1.5-3.5):1.

[0074] As a specific embodiment of the present invention, the cold rolling fluid contains:

[0075] The amount of sulfurized fatty acid ester is 0-5 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 parts, etc., preferably 0.5-4 parts by weight, more preferably 3-4 parts by weight;

[0076] The amount of nitrogen-containing borate ester is 0-5 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 parts, preferably 0.5-4 parts by weight; more preferably 0.5-1.5 parts by weight.

[0077] The amount of the acidic phosphate ester is 0-5 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 parts, preferably 0.5-4 parts by weight; more preferably 0.5-1.5 parts by weight.

[0078] The amount of ammonium phosphate salt is 0-5 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 parts, preferably 0.5-4 parts by weight; more preferably 0.5-1.5 parts by weight.

[0079] It should be noted that the sum of the primary extreme pressure anti-wear agent and the secondary extreme pressure anti-wear agent satisfies 2.0 to 5.0 parts by weight of extreme pressure anti-wear agent contained in the cold rolling fluid, and the weight ratio of the primary extreme pressure anti-wear agent to the secondary extreme pressure anti-wear agent satisfies (1 to 8): 1.

[0080] As a specific embodiment of the present invention, the rust and corrosion inhibitor includes at least one of sodium petroleum sulfonate (e.g., model T701), barium petroleum sulfonate (e.g., model T702), barium dinonylnaphthalene sulfonate (e.g., model T705), benzotriazole and its derivatives (e.g., model T746), thiadiazole and its derivatives, polyethylene polyamine and its derivatives (e.g., models F70, PAM, PAC38), fatty acid diethanolamine amide (e.g., model DT), carboxylic acid amine, succinic acid and its derivatives (e.g., model T207), dodecenylsuccinic acid (e.g., model T746), docosahexacarboxylic acid (e.g., model C21), or organic tricarboxylic acid.

[0081] As a specific embodiment of the present invention, the rust and corrosion inhibitor includes at least two of sodium petroleum sulfonate, barium dinonylnaphthalene sulfonate, polyethylene polyamine derivatives, fatty acid diethanolamine amide, dodecenyl succinic acid, benzotriazole and its derivatives, and docosahexadecanoic acid.

[0082] As a specific embodiment of the present invention, the rust and corrosion inhibitor includes a primary rust and corrosion inhibitor and a secondary rust and corrosion inhibitor; the primary rust and corrosion inhibitor is selected from at least one of polyethylene polyamine, dodecenyl succinic acid, fatty acid diethanolamine amide, benzotriazole and its derivatives, and docosahexadecanoic acid; the secondary rust and corrosion inhibitor is selected from at least one of sodium petroleum sulfonate and barium dinonylnaphthalene sulfonate; the weight ratio of the primary rust and corrosion inhibitor to the secondary rust and corrosion inhibitor is (1-10):1, preferably (3-8):1, and more preferably (4-7):1.

[0083] As a specific embodiment of the present invention, the cold rolling fluid contains:

[0084] The amount of polyethylene polyamine is 0-5 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 parts, etc., preferably 0.1-3 parts by weight;

[0085] The amount of diethanolamine amide and / or fatty acid is 0-5 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 parts, preferably 0.1-3 parts by weight; more preferably 1-2 parts by weight.

[0086] The amount of dodecenylsuccinic acid is 0-5 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 parts, preferably 0.1-3 parts by weight; more preferably 0.5-1 parts by weight.

[0087] The amount of the docosahexacarboxylic acid is 0-5 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 parts, preferably 0.1-3 parts by weight; more preferably 0.5-1 parts by weight.

[0088] The amount of benzotriazole is 0-5 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 parts, preferably 0.1-3 parts by weight; more preferably 0.1-0.3 parts by weight.

[0089] The amount of sodium petroleum sulfonate is 0-5 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 parts, preferably 0.1-3 parts by weight; more preferably 0.5-1 parts by weight.

[0090] It should be noted that the sum of the main rust and corrosion inhibitor and the auxiliary rust and corrosion inhibitor shall meet the requirement of 1.0 to 5.0 parts by weight of the rust and corrosion inhibitor included in the rolling fluid, and the weight ratio of the main rust and corrosion inhibitor and the auxiliary rust and corrosion inhibitor shall meet the requirement of (1 to 10): 1.

[0091] As a specific embodiment of the present invention, the surfactant is selected from at least one of low HLB value alkylphenol polyoxyethylene ether, high HLB value alkylphenol polyoxyethylene ether, alcohol ester type surfactant, polymeric surfactant, fatty alcohol ether carboxylic acid, quaternary ammonium salt type surfactant, and tallow amine polyoxyethylene ether, preferably selected from at least two of low HLB value alkylphenol polyoxyethylene ether, high HLB value alkylphenol polyoxyethylene ether, alcohol ester type surfactant, polymeric surfactant, and tallow amine polyoxyethylene ether.

[0092] In this invention, the term "low HLB value" refers to an HLB value ≤ 7; the term "high HLB value" refers to an HLB value > 7.

[0093] Specifically, the low HLB value alkylphenol polyoxyethylene ether is selected from at least one of TX-4, TX-5, OP-4, and OP-5.

[0094] Specifically, the high HLB value alkylphenol polyoxyethylene ether is selected from at least one of TX-9, TX-10, OP-9, and OP-10.

[0095] Specifically, the alcohol ester type surfactant is selected from at least one of SP and TW.

[0096] Specifically, the polymeric surfactant has a molecular weight greater than 7000. The polymeric surfactant is composed of a large number of structural units that contain both hydrophilic and hydrophobic groups, and can be selected from polymeric surfactants with the brand name B261.

[0097] Specifically, the fatty alcohol ether carboxylic acid is selected from at least one of C70 and E205.

[0098] Specifically, the quaternary ammonium salt surfactant is selected from at least one of 8950, GC, and K3.

[0099] Specifically, the shea butter amine polyoxyethylene ether is selected from shea butter amine polyoxyethylene ether with the brand name T15.

[0100] In one specific embodiment of the present invention, the surfactant includes a primary surfactant and a secondary surfactant; the primary surfactant is selected from at least one of low HLB value alkylphenol polyoxyethylene ether, high HLB value alkylphenol polyoxyethylene ether, and polymeric surfactant; the secondary surfactant is selected from at least one of tallow amine polyoxyethylene ether and fatty alcohol ether carboxylic acid; the mass ratio of the primary surfactant to the secondary surfactant is 1:(0.05-1), preferably 1:(0.06-0.5).

[0101] As a specific embodiment of the present invention, the cold rolling fluid contains:

[0102] The amount of low HLB value alkylphenol is 0-4 parts by weight of polyoxyethylene ether, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5 parts, etc., preferably 0.1-3 parts by weight; more preferably 0.5-1 parts by weight.

[0103] The amount of alkylphenol polyoxyethylene ether with and / or high HLB value is 0 to 4 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5 parts, etc., preferably 0.1 to 3 parts by weight; more preferably 1 to 2 parts by weight.

[0104] The amount of the polymeric surfactant is 0 to 4 parts by weight, for example, 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5 parts, etc., preferably 0.1 to 3 parts by weight; more preferably 0.1 to 0.5 parts by weight.

[0105] The amount of fatty alcohol ether carboxylic acid is 0-4 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5 parts, etc., preferably 0.1-3 parts by weight; more preferably 0.3-0.7 parts by weight.

[0106] The amount of the ether and / or tartrate polyoxyethylene ether is 0 to 4 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5 parts, etc., preferably 0.1 to 3 parts by weight; more preferably 0.2 to 0.5 parts by weight.

[0107] It should be noted that the sum of the main surfactant and the auxiliary surfactant satisfies the requirement that the cold rolling fluid contains 1.0 to 4.0 parts by weight of surfactant. The mass ratio of the main surfactant to the auxiliary surfactant satisfies 1:(0.05 to 1).

[0108] In one specific embodiment of the present invention, the antioxidant is selected from at least one of shielding phenolic antioxidants and amine antioxidants.

[0109] Specifically, the shielding phenolic antioxidant is selected from at least one of T51, L135, and RC71.

[0110] Specifically, the amine antioxidant is selected from at least one of T54, VPA, and L57.

[0111] In one specific embodiment of the present invention, the cold rolling fluid contains,

[0112] The amount of shielding phenolic antioxidant is 0-4 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5 parts, etc., preferably 0.1-2 parts by weight;

[0113] The amount of amine antioxidant used is 0-4 parts by weight, such as 0.5, 1, 1.5, 2.0, 2.5, 3.0, 3.5 parts, etc., preferably 0.1-2 parts by weight.

[0114] In one specific embodiment of the present invention, the rolling fluid composition does not contain organosiloxanes. It should be noted that organosiloxanes are generally defoamers, which easily precipitate flocculent substances in emulsions. The cold rolling fluid provided by the present invention inherently possesses good defoaming properties, eliminating the need for the addition of siloxane-based defoamers and preventing the precipitation of flocculent substances.

[0115] It should be noted that the rolling fluid composition of the present invention has excellent rust prevention, lubrication and cleaning properties, and can meet the technical requirements of rolling fluid for cold rolling of oriented silicon steel.

[0116] Secondly, the present invention provides a method for preparing a cold rolling solution, comprising the following steps:

[0117] S1: Heat and stir the boundary lubricant and base oil to obtain a mixture;

[0118] S2: Add extreme pressure anti-wear agent, rust and corrosion inhibitor and antioxidant to the mixture obtained in step S1, heat and stir to obtain a mixture;

[0119] S3: Add surfactant to the mixture obtained in step S2, heat and stir, and after the mixture is completely clear and transparent, cool to room temperature to obtain cold rolling liquid.

[0120] In one specific embodiment of the present invention, the heating and stirring conditions in steps S1, S2 and S3 each independently include: a temperature of 45-55°C; and / or a stirring rate of 300-500 rpm; and / or a stirring time of 0.5-2 h.

[0121] Thirdly, the present invention provides the application of cold rolling fluid in the cold rolling process of steel (e.g., oriented silicon steel, plain carbon steel, stainless steel).

[0122] In one specific embodiment of the present invention, the cold rolling fluid is applied in the form of an emulsion. Preferably, the emulsion is prepared by diluting the cold rolling fluid composition with demineralized water. Preferably, the concentration of the cold rolling fluid in the emulsion is 0.5 to 4.5% by weight.

[0123] All of the above-mentioned raw materials used in this invention can be prepared in-house or purchased commercially; this invention does not impose any particular limitations on them.

[0124] The following detailed description of preferred embodiments of the present invention illustrates the principles of the invention and is not intended to limit the scope of the invention.

[0125] Example 1

[0126] This embodiment provides a cold rolling flux, its preparation method, and its application. Raw materials are prepared according to the component weight proportions in Table 1, with specific details as follows:

[0127] S1: Add the boundary lubricant and base oil to a reaction vessel with a stirrer, heat and stir at 50±5℃ for 1 hour to obtain a mixture, wherein the stirring rate is 400 rpm;

[0128] S2: Add extreme pressure anti-wear agent, rust and corrosion inhibitor and antioxidant to the mixture obtained in step S1 in sequence, and stir at 50±5℃ until all additives are dissolved (1h) to obtain a mixture, wherein the stirring rate is 400rpm.

[0129] S3: Add surfactant to the mixture obtained in step S2, stir at 50±5℃ until all additives are dissolved (1h), cool to room temperature to obtain cold rolling liquid composition, wherein the stirring rate is 300rpm.

[0130] Example 2-10

[0131] The rolling fluid composition was prepared according to the formulation in Table 1 using the same method as in Example 1.

[0132] Table 1. Formulations (parts by weight) of the compositions in Examples 1-10 (S1-S10)

[0133]

[0134]

[0135] Comparative Example 1

[0136] The rolling fluid composition was prepared according to the formulation disclosed in Example 1 of document CN 105779093 A, and the specific formulation is shown in Table 2.

[0137] Table 2 Comparative Example 1 Rolling Fluid Composition Formulation

[0138]

[0139] Comparative Example 2

[0140] A commercially available cold rolling flux composition for grain-oriented silicon steel, purchased from Quaker Hofton, was used as a control.

[0141] Test case

[0142] The properties of the rolling fluid compositions of each embodiment and comparative example were measured according to the following method, and the results are shown in Table 3.

[0143] 1. Extreme pressure lubrication performance

[0144] Extreme pressure lubrication performance represents the load-bearing capacity of the lubricating film formed by the lubricant. According to the test standard GB / T3142-2019, the maximum non-seize load (PB) value of the tested oil is measured. The higher the PB value, the greater the strength of the lubricating film, the stronger its load-bearing capacity, and the better its lubrication performance. In the testing method, the PB value is classified into 57 grades, ranging from 98N (10kg) to 7845 (800kg). The PB value grades involved in this invention belong to the following ranges: 784N (80kg), 834N (85kg), 883N (90kg), 932N (95kg), 981N (100kg), 1020N (104kg), 1069N (109kg), 1118N (114kg), 1167N (119kg), 1236N (126kg), 1294N (132kg), and 1363N (139kg).

[0145] 2. Rust prevention ability

[0146] Rust prevention capability represents the performance of lubricating grease in preventing metal corrosion and rusting. It is evaluated according to the rust prevention test in GB / T 6144 "Synthetic Cutting Fluids" 5.9 and the rust prevention performance test in IP287 "Water-soluble Metalworking Fluids". GB / T 6144 "Synthetic Cutting Fluids" 5.9.6.1 is a single-piece rust prevention test, divided into four levels: A, B, C, and D, with level A being qualified. IP287 "Water-soluble Metalworking Fluids" is a rust prevention test using iron filings and filter paper. Rust prevention performance is evaluated based on the rusted area of ​​iron filings within a specified area; the smaller the area, the better the rust prevention performance.

[0147] Table 3 Performance of the cold rolling melt compositions of Examples 1-10 and Comparative Examples 1-2

[0148]

[0149]

[0150] As shown in Table 3, the cold rolling fluid compositions in Examples 1 to 10 are superior to those in Comparative Examples 1 to 2 in the maximum non-seizing load and iron filings filter paper rust prevention tests. Among them, the solution in Example 1 is the best in terms of lubricity.

[0151] It is believed that the present invention achieves excellent performance through the synergistic combination of its components. For example, the present invention uses a specific rust inhibitor, polyethylene polyamine, and combines it with other rust inhibitors in a reasonable manner, especially the synergistic combination of polyethylene polyamine and fatty acid diethanolamine amide, which achieves excellent rust prevention performance. In addition, the combination of different types of extreme pressure anti-wear agents, especially the synergistic effect of ammonium phosphate salt and other sulfurized extreme pressure agents, can effectively improve the PB value and obtain better extreme pressure performance with a lower addition amount (and can increase the amount of boundary lubricant). At the same time, the combined use of surfactants, including polymeric surfactants and tallow amine polyoxyethylene ether, gives the rolling fluid composition of the present invention better detergency and stability in use, which can meet the requirements of cold rolling of grain-oriented silicon steel and achieve good results.

[0152] In summary, the cold rolling fluid composition of the present invention achieves optimal rust prevention and lubrication performance, meeting the stringent requirements of cold rolling of grain-oriented silicon steel. The cold rolling fluid composition of the present invention, through the compounding and synergistic effect of its components, exhibits excellent comprehensive performance and can meet the usage requirements of a 20-roll Sendzimir mill.

[0153] Application Example 1

[0154] The cold rolling fluid composition prepared in Example 1 was diluted with demineralized water to a weight percentage concentration of 2.5% emulsion, and used for process lubrication of oriented silicon steel rolled on a 1450mm twenty-roll Sendzimir mill, achieving good application results; wherein the maximum rolling pressure of the mill is 8000KN and the maximum rolling speed is 800m / min.

[0155] Application Example 2

[0156] The cold rolling fluid composition prepared in Example 2 was diluted with demineralized water to a weight percentage concentration of 1.5% emulsion, and used for process lubrication of non-oriented silicon steel with low content in the rolling of base cabinets on an 850mm four-roll three-strand mill, achieving good application results; wherein, the maximum rolling pressure of the mill is 8000KN and the maximum rolling speed is 400m / min.

[0157] It should be noted that the embodiments described above 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. A cold rolling fluid, characterized in that, The rolling fluid comprises the following components or is prepared from raw materials comprising the following components: Boundary lubricant, 50.0–70.0 parts by weight; Base oil 14.0–46.0 parts by weight; Extreme pressure anti-wear agent, 2.0–5.0 parts by weight; Rust and corrosion inhibitor, 1.0 to 5.0 parts by weight; Surfactant 1.0 to 4.0 parts by weight; and Antioxidant 0.0 to 4.0 parts by weight.

2. The rolling fluid according to claim 1, characterized in that, The amount of the boundary lubricant is 55-65 parts by weight; And / or, the amount of the base oil is 18-40 parts by weight; And / or, the amount of the extreme pressure anti-wear agent is 3-4.5 parts by weight; And / or, the amount of the rust and corrosion inhibitor is 3-5 parts by weight; And / or, the amount of the surfactant is 2-3.5 parts by weight; And / or, the amount of the antioxidant is 0.2-2 parts by weight.

3. The rolling fluid according to claim 1 or 2, characterized in that, The boundary lubricant includes at least one of palm oil, coconut oil, soybean oil, isooctyl palmitate, trimethylolpropane fatty acid ester, and pentaerythritol fatty acid ester. Preferably, the boundary lubricant includes a primary boundary lubricant and a secondary boundary lubricant. The primary boundary lubricant includes at least one of palm oil, coconut oil, and soybean oil. The secondary boundary lubricant includes at least one of isooctyl palmitate, trimethylolpropane fatty acid ester, and pentaerythritol fatty acid ester. The weight ratio of the primary boundary lubricant to the secondary boundary lubricant is (1-8):1, preferably (1.5-6):

1. Preferably, in the cold rolling solution: The amount of palm oil is 0-70 parts by weight, preferably 10-60 parts by weight; And / or, the amount of soybean oil is 0-70 parts by weight, preferably 10-60 parts by weight, more preferably 10-40 parts by weight; And / or, the amount of coconut oil is 0-70 parts by weight, preferably 10-60 parts by weight, more preferably 10-40 parts by weight; And / or, the amount of pentaerythritol fatty acid ester is 0-70 parts by weight, preferably 10-60 parts by weight, more preferably 10-30 parts by weight; And / or, the amount of trimethylolpropane fatty acid ester is 0-70 parts by weight, preferably 10-60 parts by weight, more preferably 10-30 parts by weight.

4. The rolling fluid according to any one of claims 1-3, characterized in that, The base oil comprises at least one of Group I refined mineral oil and Group II hydrotreated mineral oil, or, preferably, the base oil comprises Group I refined mineral oil and Group II hydrotreated mineral oil. The kinematic viscosity of the base oil at 40°C is in the range of 30.0–50.0 mm⁻¹. 2 / s.

5. The rolling fluid according to any one of claims 1-4, characterized in that, The extreme pressure anti-wear agent includes at least one of the following: inactive sulfurized olefins, sulfurized fatty acid esters, sulfurized fatty oil acid phosphate esters, alcohol ether phosphate esters, phosphate ester amine salts, and nitrogen-containing borate esters. Preferably, the extreme pressure anti-wear agent comprises a primary extreme pressure anti-wear agent and a secondary extreme pressure anti-wear agent. The primary extreme pressure anti-wear agent comprises at least one of sulfurized fatty acid esters and nitrogen-containing borate esters. The secondary extreme pressure anti-wear agent comprises at least one of acidic phosphate esters, phosphites, and ammonium phosphate salts. The weight ratio of the primary extreme pressure anti-wear agent to the secondary extreme pressure anti-wear agent is (1-8):1, preferably (1-6):1, and more preferably (1.5-3.5):

1. Preferably, in the cold rolling solution: The amount of the sulfurized fatty acid ester is 0-5 parts by weight, preferably 0.5-4 parts by weight; And / or, the amount of nitrogen-containing borate ester is 0-5 parts by weight, preferably 0.5-4 parts by weight, more preferably 0.5-1.5 parts by weight; And / or, the amount of acidic phosphate ester is 0-5 parts by weight, preferably 0.5-4 parts by weight, more preferably 0.5-1.5 parts by weight; And / or, the amount of ammonium phosphate salt is 0-5 parts by weight, preferably 0.5-4 parts by weight, more preferably 0.5-1.5 parts by weight.

6. The rolling fluid according to any one of claims 1-5, characterized in that, The rust and corrosion inhibitors include at least one of sodium petroleum sulfonate, barium petroleum sulfonate, barium dinonylnaphthalene sulfonate, benzotriazole and its derivatives, thiadiazole and its derivatives, polyethylene polyamine and its derivatives, fatty acid diethanolamine amide, carboxylic acid amine, succinic acid derivatives, dodecenyl succinic acid, docosahexacarboxylic acid or organic tricarboxylic acid. Preferably, the rust and corrosion inhibitor includes a primary rust and corrosion inhibitor and a secondary rust and corrosion inhibitor; the primary rust and corrosion inhibitor includes at least one of polyethylene polyamine, dodecenyl succinic acid, fatty acid diethanolamine amide, benzotriazole and its derivatives, and docosahexadecanoic acid; the secondary rust and corrosion inhibitor includes at least one of sodium petroleum sulfonate and barium dinonylnaphthalene sulfonate; the weight ratio of the primary rust and corrosion inhibitor to the secondary rust and corrosion inhibitor is (1-10):1, preferably (3-8):1, more preferably (4-7):1; Preferably, in the cold rolling solution: The amount of polyethylene polyamine is 0-5 parts by weight, preferably 0.1-3 parts by weight; And / or, the amount of fatty acid diethanolamine amide is 0-5 parts by weight, preferably 0.1-3 parts by weight, more preferably 1-2 parts by weight. And / or, the amount of dodecenylsuccinic acid is 0-5 parts by weight, preferably 0.1-3 parts by weight, more preferably 0.5-1 parts by weight; And / or, the amount of docosahexacarboxylic acid is 0-5 parts by weight, preferably 0.1-3 parts by weight, more preferably 0.5-1 parts by weight; And / or, the amount of benzotriazole is 0-5 parts by weight, preferably 0.1-3 parts by weight, more preferably 0.1-0.3 parts by weight; And / or, the amount of sodium petroleum sulfonate is 0-5 parts by weight, preferably 0.1-3 parts by weight, more preferably 0.5-1 parts by weight.

7. The rolling fluid according to any one of claims 1-6, characterized in that, The surfactant includes at least one of the following: low HLB value alkylphenol polyoxyethylene ether, high HLB value alkylphenol polyoxyethylene ether, alcohol ester type surfactant, polymeric surfactant, fatty alcohol ether carboxylic acid, quaternary ammonium salt type surfactant, and tallow amine polyoxyethylene ether. Preferably, the surfactant comprises a primary surfactant and a secondary surfactant; the primary surfactant comprises at least one of low HLB value alkylphenol polyoxyethylene ether, high HLB value alkylphenol polyoxyethylene ether, and polymeric surfactant; the secondary surfactant comprises at least one of tallow amine polyoxyethylene ether and fatty alcohol ether carboxylic acid; and the mass ratio of the primary surfactant to the secondary surfactant is 1:(0.05-1), preferably 1:(0.06-0.5). Preferably, in the cold rolling solution: The amount of low HLB value alkylphenol polyoxyethylene ether is 0-4 parts by weight, preferably 0.1-3 parts by weight, and more preferably 0.5-1 parts by weight; And / or, the amount of high HLB value alkylphenol polyoxyethylene ether is 0 to 4 parts by weight, preferably 0.1 to 3 parts by weight, more preferably 1 to 2 parts by weight; And / or, the amount of polymeric surfactant is 0 to 4 parts by weight, preferably 0.1 to 3 parts by weight, more preferably 0.1 to 0.5 parts by weight; And / or, the amount of fatty alcohol ether carboxylic acid is 0-4 parts by weight, preferably 0.1-3 parts by weight, more preferably 0.3-0.7 parts by weight; And / or, the amount of tallow amine polyoxyethylene ether is 0 to 4 parts by weight, preferably 0.1 to 3 parts by weight, more preferably 0.2 to 0.5 parts by weight.

8. The rolling fluid according to any one of claims 1-7, characterized in that, The antioxidant is selected from at least one of shielding phenolic antioxidants and amine antioxidants; Preferably, in the cold rolling solution: The amount of shielding phenolic antioxidant is 0-4 parts by weight, preferably 0.1-2 parts by weight; And / or, the amount of amine antioxidant used is 0-4 parts by weight, preferably 0.1-2 parts by weight.

9. A method for preparing a cold rolling solution according to any one of claims 1-8, characterized in that, Includes the following steps: S1: Heat and stir the mixture including boundary lubricant and base oil; S2: Add extreme pressure anti-wear agent, rust and corrosion inhibitor and antioxidant, heat and stir; S3: Add surfactant, heat and stir, cool to obtain the rolling solution.

10. The application of a cold rolling fluid according to any one of claims 1-8 or a cold rolling fluid prepared by the preparation method according to claim 9 in the cold rolling process of steel; Preferably, the cold rolling fluid is applied in the form of an emulsion. More preferably, the emulsion is prepared by diluting the cold rolling solution with demineralized water; Preferably, the concentration of the cold rolling solution in the emulsion is 0.5 to 4.5% by weight.

Images