Rolling oil for cold rolling of silicon steel plate and preparation method of rolling oil

Abstract

The invention provides silicon steel plate cold rolling oil and a preparation method thereof, and belongs to the technical field of metal processing lubricants. The silicon steel plate cold rolling oil provided by the invention comprises the following components in percentage by mass: 20-40% of mineral oil, 40-60% of synthetic ester, 2-6% of an extreme pressure lubricant, 1-2% of an anti-wear and anti-friction agent, 5-8% of an emulsifier, 0.5-2% of an antirust agent and 0.5-3% of an antioxidant, the emulsifier comprises a polymer emulsifier. The polymer emulsifier used in the invention is of a high molecular weight surfactant structure, so that the emulsion has a stable and controllable oil-water balance system, thereby forming the emulsion with high stability, high granularity concentration and excellent film-forming spreading performance; further, the stable lubricity and anti-rust property required by the silicon steel plate in the cold rolling and rolling process are effectively considered; and the synthetic ester with high additive amount is adopted, so that the cleanliness requirement of the rolled and annealed plate surface of the silicon steel plate cold rolling oil is effectively ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of metal processing lubricants, and in particular relates to a silicon steel plate cold rolling oil and a preparation method thereof. Background Art

[0002] As the core part of the lubrication in the cold rolling and calendering process of steel, the performance requirements of cold rolling oil for steel are getting higher and higher. Especially for the calendering process of silicon steel sheets, compared with carbon steel and stainless steel, they have higher brittleness and deformation resistance. At the same time, the emulsion lubrication is uneven during the calendering process, and it is very easy to corrode and rust, and the plate surface residue problem appears during the high-temperature annealing process, which greatly affects the quality of the finished silicon steel sheets. Therefore, how to improve the rolling oil to solve the problems of uneven emulsion lubrication, easy corrosion and rust, and poor plate surface cleanliness in the cold rolling and calendering process of silicon steel sheets has become a technical problem that needs to be solved urgently in this field. Summary of the invention

[0003] The purpose of the present invention is to provide a silicon steel plate cold rolling oil and a preparation method thereof. The silicon steel plate cold rolling oil provided by the present invention has excellent lubrication performance, rust resistance and high temperature ablation volatility, thereby effectively ensuring the cleanliness requirements of the silicon steel plate cold rolling oil after rolling and annealing.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] The present invention provides a silicon steel plate cold rolling oil, the composition of which comprises, by mass percentage:

[0006] Mineral oil 20-40%,

[0007] Synthetic ester 40-60%,

[0008] Extreme pressure lubricant 2-6%,

[0009] Anti-wear and friction reducing agent 1-2%,

[0010] Emulsifier 5-8%,

[0011] Rust inhibitor 0.5~2%

[0012] and antioxidant 0.5-3%;

[0013] The emulsifier includes a polymer emulsifier.

[0014] Preferably, the composition comprises, by mass percentage:

[0015] Mineral oil 25-37%,

[0016] Synthetic ester 45-55%,

[0017] Extreme pressure lubricant 3-5%,

[0018] Anti-wear and friction-reducing agent 1.2 - 1.8%,

[0019] Emulsifier 5.5 - 7.5%,

[0020] Rust inhibitor 0.8 - 1.6%

[0021] and antioxidant 0.8 - 2%.

[0022] Preferably, the mineral oil includes at least one of paraffin-based mineral oil and naphthenic mineral oil.

[0023] Preferably, the synthetic ester includes at least one of isooctyl oleate and isooctyl stearate.

[0024] Preferably, the extreme pressure lubricant includes at least one of sulfurized lard and sulfurized olefins.

[0025] Preferably, the anti-wear and friction-reducing agent includes at least one of tricresyl phosphate, fatty alcohol ethoxylated phosphate ester, and phosphate ester amine salt.

[0026] Preferably, the emulsifier further includes fatty alcohol polyoxyethylene ether.

[0027] Preferably, the rust inhibitor includes at least one of benzotriazole, alkenyl succinic acid ester, and calcium petroleum sulfonate.

[0028] Preferably, the antioxidant is 2,6-di-tert-butyl-p-cresol and octyl butyl diphenylamine.

[0029] The present invention also provides a preparation method of the cold rolling rolling oil for silicon steel sheets according to the above technical solution, including:

[0030] Mixing the mineral oil, synthetic ester, extreme pressure lubricant, anti-wear and friction-reducing agent, emulsifier, rust inhibitor, and antioxidant to obtain the cold rolling rolling oil for silicon steel sheets.

[0031] The present invention provides a cold rolling rolling oil for silicon steel sheets, and its composition by mass percentage includes: 20-40% of mineral oil, 40-60% of synthetic ester, 2-6% of extreme pressure lubricant, 1-2% of anti-wear and friction reducing agent, 5-8% of emulsifier, 0.5-2% of rust inhibitor, and 0.5-3% of antioxidant; the emulsifier includes a high molecular weight emulsifier. In the present invention, the compounding of mineral oil and synthetic ester is used as the base oil, and it is blended with a variety of functional additives. Among them, the high molecular weight emulsifier has a large molecular weight surfactant structure, which can make the emulsion after dilution with water of the cold rolling rolling oil for silicon steel sheets have a stable and controllable oil-water balance system, thereby forming an emulsion with high stability, high particle concentration, and excellent film-forming spreading performance, and effectively taking into account the stable lubricity and rust resistance required during the cold rolling process of silicon steel sheets; in addition, a high addition amount of synthetic ester is used, which has excellent high-temperature ablation volatility, thereby effectively ensuring the cleanliness requirements of the silicon steel sheet surface after rolling and annealing. The experimental results show that the kinematic viscosity (40 °C) of the cold rolling rolling oil for silicon steel sheets provided by the present invention is 46.22-48.21 mm 2 / s, the viscosity index is 172-178, the pour point is -18--22 °C, the acid value is 3.8-5.2 mgKOH / g, the saponification value is 122-128 mgKOH / g, the pH value is 5.2-5.8, the ESI is 75-80%, and the emulsion particle size D 50 is 35.31-97.87 μm; the oil film strength is 1453-2080 N, the friction coefficient is 0.046-0.050, the water separation spreading property is 149-178 mg / m 2 , the loss rate at 800 °C is 99.2-99.8%, and there is no rust in the silicon steel sheet rust test. Description of the Drawings

[0032] Figure 1 is the particle size distribution curve of the emulsion after dilution with water of the cold rolling rolling oil for silicon steel sheets prepared in Example 1;

[0033] Figure 2 is the particle size distribution curve of the emulsion after dilution with water of the cold rolling rolling oil for silicon steel sheets prepared in Example 2;

[0034] Figure 3 is the particle size distribution curve of the emulsion after dilution with water of the cold rolling rolling oil for silicon steel sheets prepared in Example 3;

[0035] Figure 4 is the particle size distribution curve of the emulsion after dilution with water of the cold rolling rolling oil for silicon steel sheets prepared in Example 4;

[0036] Figure 5 is the particle size distribution curve of the emulsion after dilution with water of the cold rolling rolling oil for silicon steel sheets prepared in Example 5;

[0037] Figure 6 It is the particle size distribution curve of the emulsion after diluting the commercially available product of Comparative Example 1 with water;

[0038] Figure 7 It is the particle size distribution curve of the emulsion after diluting the commercially available product of Comparative Example 2 with water. Detailed implementation mode

[0039] The present invention provides a cold rolling rolling oil for silicon steel sheets, and the composition includes, by mass percentage:

[0040] Mineral oil 20-40%,

[0041] Synthetic ester 40-60%,

[0042] Extreme pressure lubricant 2-6%,

[0043] Anti-wear and friction-reducing agent 1-2%,

[0044] Emulsifier 5-8%,

[0045] Rust inhibitor 0.5-2%

[0046] And antioxidant 0.5-3%;

[0047] The emulsifier includes a polymer emulsifier.

[0048] The present invention has no special limitation on the sources of each component, and commercially available products well-known to those skilled in the art can be used.

[0049] By mass percentage, the composition of the cold rolling rolling oil for silicon steel sheets provided by the present invention includes 20-40% of mineral oil, preferably 25-37%. As an implementation mode, the mass content of the mineral oil can be 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35% or 36%. In the present invention, the mineral oil can be compounded with the synthetic ester as a base oil, so as to further improve the lubricity and rust prevention property.

[0050] In the present invention, the mineral oil preferably includes at least one of paraffin-based mineral oil and naphthenic mineral oil; the paraffin-based mineral oil is preferably 150SN and / or 250SN; the naphthenic mineral oil is preferably KN4006#.

[0051] In the present invention, the mass content of 150SN is preferably 10-20%; the mass content of 250SN is preferably 10-20%; the mass content of KN4006# is preferably 10-20%, more preferably 15-17%.

[0052] In terms of mass percentage, the composition of the cold rolling rolling oil for silicon steel sheets provided by the present invention further includes 40-60% of a synthetic ester, preferably 45-58%. As an embodiment, the mass content of the synthetic ester can be 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56% or 57%. In the present invention, the synthetic ester has excellent high-temperature ablation volatility, thus effectively ensuring the cleanliness requirements of the surface of the silicon steel sheet after cold rolling and annealing.

[0053] In the present invention, the synthetic ester preferably includes at least one of isooctyl oleate and isooctyl stearate; the mass content of the isooctyl oleate is preferably 20-60%, more preferably 40-50%; the mass content of the isooctyl stearate is preferably 10-40%, further preferably 18-38%, and more preferably 20-25%.

[0054] In terms of mass percentage, the composition of the cold rolling rolling oil for silicon steel sheets provided by the present invention further includes 2-6% of an extreme pressure lubricant, preferably 2.5-5%, and more preferably 3-4%. In the present invention, the extreme pressure lubricant can improve the lubrication performance of the cold rolling rolling oil for silicon steel sheets.

[0055] In the present invention, the extreme pressure lubricant preferably includes at least one of sulfurized lard and sulfurized olefins; the mass content of the sulfurized lard is preferably 1-3%, more preferably 1.5-2%; the mass content of the sulfurized olefins is preferably 1-3%, more preferably 2%. Limiting the content of each component in the extrusion lubricant within the above range in the present invention can further improve the lubrication performance of the cold rolling rolling oil for silicon steel sheets.

[0056] As an embodiment, the sulfurized lard can be sulfurized lard YD-1810C; the sulfurized olefins can be dialkyl pentasulfide RC2540.

[0057] In terms of mass percentage, the composition of the cold rolling rolling oil for silicon steel sheets provided by the present invention further includes 1-2% of an anti-wear and friction-reducing agent, preferably 1.2-1.8%, and more preferably 1.4-1.6%. In the present invention, the anti-wear and friction-reducing agent can improve the lubrication performance of the base oil, enabling it to maintain good lubrication effects under extreme conditions; at the same time, it can also improve the thermal stability, being able to maintain its performance under high-temperature conditions and preventing oil deterioration caused by high temperatures.

[0058] In the present invention, the anti-wear and friction-reducing agent preferably comprises at least one of tricresyl phosphate, fatty alcohol ethoxylated phosphate, and amine salt of phosphate; the mass content of the tricresyl phosphate is preferably 0.5-1%, more preferably 0.7-0.8%; the mass content of the fatty alcohol ethoxylated phosphate is preferably 0.5-1%, more preferably 0.7-0.8%; the mass content of the amine salt of phosphate is preferably 0.5-1%, more preferably 0.7-0.8%. Limiting the content of each component in the anti-wear and friction-reducing agent within the above range in the present invention can further improve the lubricating performance and thermal stability of the cold rolling rolling oil for silicon steel sheets.

[0059] As an embodiment, the fatty alcohol ethoxylated phosphate may be fatty alcohol ethoxylated phosphate AL200; the amine salt of phosphate may be amine salt of phosphate 672.

[0060] By mass percentage, the composition of the cold rolling rolling oil for silicon steel sheets provided by the present invention further comprises 5-8% of an emulsifier, preferably 5.4-7.5%. As an embodiment, the mass content of the emulsifier may be 5.5%, 6%, 6.5% or 7%. In the present invention, the emulsifier can improve the emulsifying performance of the cold rolling rolling oil for silicon steel sheets, thereby forming an emulsion with high stability, high particle concentration and excellent film-forming spreading performance, and further effectively taking into account the stable lubricity and rust prevention required during the cold rolling process of silicon steel sheets.

[0061] In the present invention, the emulsifier comprises a polymer emulsifier; the polymer emulsifier is preferably Hypermer TM A70; the mass content of the polymer emulsifier is preferably 0.1-0.5%, more preferably 0.4-0.5%.

[0062] In the present invention, the emulsifier preferably further comprises fatty alcohol polyoxyethylene ether; the fatty alcohol polyoxyethylene ether is preferably AEO-3 and AEO-9; the mass content of AEO-3 is preferably 4-7%, further preferably 4.5-6%, more preferably 5-5.5%; the mass content of AEO-9 is preferably 0.5-1%, more preferably 0.6-0.8%. Limiting the content of each substance in the emulsifier within the above range in the present invention can further improve the emulsifying effect, thereby further improving the lubricity and rust prevention of the cold rolling rolling oil for silicon steel sheets.

[0063] By mass percentage, the composition of the cold rolling oil for silicon steel sheets provided by the present invention further includes 0.5-2% of a rust inhibitor, preferably 0.6-1.6%. As an embodiment, the mass content of the rust inhibitor can be 0.8-1.5%, and can also be 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4% or 1.5%. In the present invention, the rust inhibitor can further improve the rust prevention performance of the cold rolling oil for silicon steel sheets.

[0064] In the present invention, the rust inhibitor preferably includes at least one of benzotriazole, alkenyl succinic acid ester and calcium petroleum sulfonate; the mass content of the benzotriazole, alkenyl succinic acid ester and calcium petroleum sulfonate is independently preferably 0.1-0.5%, further preferably 0.2-0.4%, and more preferably 0.3%. Limiting the content of each component in the rust inhibitor within the above range in the present invention can further improve the rust prevention effect.

[0065] As an embodiment, the alkenyl succinic acid ester can be alkenyl succinic acid ester T747.

[0066] By mass percentage, the composition of the cold rolling oil for silicon steel sheets provided by the present invention further includes 0.5-3% of an antioxidant, preferably 0.8-2%. As an embodiment, the mass content of the antioxidant can be 1.0%, 1.2%, 1.4%, 1.6% or 1.8%. In the present invention, the antioxidant can improve the thermal stability of the cold rolling oil for silicon steel sheets.

[0067] In the present invention, the antioxidant is preferably 2,6-di-tert-butyl-p-cresol and octyl butyl diphenylamine; the mass content of the 2,6-di-tert-butyl-p-cresol and octyl butyl diphenylamine is independently preferably 0.1-0.5%, further preferably 0.2-0.4%, and more preferably 0.25-0.3%.

[0068] The present invention uses a compound of mineral oil and synthetic ester as the base oil and blends it with a variety of functional additives. Among them, the high molecular emulsifier has a large molecular weight surfactant structure, which can make the emulsion after diluting the cold rolling oil for silicon steel sheets with water have a stable and controllable oil-water balance system, thereby forming an emulsion with high stability, high particle concentration and excellent film-forming spreading performance, and effectively taking into account the stable lubricity and rust prevention required during the cold rolling process of silicon steel sheets; in addition, a high addition amount of synthetic ester is used, which has excellent high-temperature ablation volatility, thereby effectively ensuring the cleanliness requirements of the silicon steel sheet surface after rolling and annealing, and solving the pain points of uneven lubrication of the emulsion, easy corrosion and rust, and poor surface cleanliness during the cold rolling process of silicon steel.

[0069] The present invention also provides a preparation method of the cold rolling oil for silicon steel sheets according to the above technical solution, including:

[0070] Mix mineral oil, synthetic ester, extreme pressure lubricant, anti-wear and friction reducing agent, emulsifier, rust inhibitor and antioxidant to obtain cold rolling oil for silicon steel sheet.

[0071] In the present invention, the mixing of the mineral oil, synthetic ester, extreme pressure lubricant, anti-wear and friction reducing agent, emulsifier, rust inhibitor and antioxidant is preferably as follows: mix the mineral oil and synthetic ester, and then sequentially add the extreme pressure lubricant, anti-wear and friction reducing agent, rust inhibitor, antioxidant and emulsifier.

[0072] In the present invention, the temperature for mixing the mineral oil and synthetic ester is preferably 50-60°C; the mixing is preferably carried out under stirring conditions. The present invention has no special limitation on the operation of the stirring, and it is sufficient to stir evenly.

[0073] The present invention has no special limitation on the operation of sequentially adding the extreme pressure lubricant, anti-wear and friction reducing agent, rust inhibitor, antioxidant and emulsifier, and it is sufficient to stir well until it becomes semi-transparent.

[0074] The preparation process of the present invention is simple, the conditions are mild, the production cost is low, and it is easy to realize industrialization; moreover, the product has excellent performance. The emulsion diluted with water in a ratio of 2-3% can provide sufficient lubrication for the cold rolling process of silicon steel sheet, and at the same time has long-term anti-corrosion and rust protection performance, and effectively ensures the cleanliness of the plate surface. It is a high-performance lubricant for the cold rolling and rolling process of silicon steel sheet.

[0075] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the embodiments in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0076] Example 1

[0077] The composition of the cold rolling oil for silicon steel sheet is by mass percentage: 10% of 150SN, 20% of 250SN, 60% of isooctyl oleate, 1% of sulfonated lard YD-1810C, 1% of dialkyl pentasulfide RC2540, 0.5% of tricresyl phosphate, 0.5% of fatty alcohol ethoxylated phosphate TM AL200 0.5%, AEO-3 4.5%, AEO-9 0.5%, Hypermer

[0078] The preparation method of the silicon steel plate cold rolling oil is:

[0079] Add 150SN, 250SN and isooctyl oleate into the blending kettle, heat to 60℃, stir evenly, and then add sulfurized lard YD-1810C, dialkyl pentasulfide RC2540, tricresyl phosphate, fatty alcohol ethoxylated phosphate ester in turn. AL200, benzotriazole, succinate T747, calcium petroleum sulfonate, 2,6-di-tert-butyl-p-methylphenol and octylbutyl diphenylamine were added to the blending kettle and stirred until completely dissolved. AEO-3, AEO-9 and Hypermer TM A70 is added into the system and stirred thoroughly until it becomes translucent to obtain silicon steel sheet cold rolling oil.

[0080] Example 2

[0081] The composition of silicon steel cold rolling oil is as follows by mass percentage: 150SN 10%, KN4006# 20%, oleic acid ethyl ester 40%, stearic acid ethyl ester 18%, sulfurized lard YD-1810C 1.5%, dialkyl pentasulfide RC25401%, tricresyl phosphate 0.8%, fatty alcohol ethoxylated phosphate AL2000.7%, AEO-35%, AEO-90.5%, Hypermer TM A700.5%, alkenyl succinate T7470.5%, calcium petroleum sulfonate 0.5%, 2,6-di-tert-butyl-p-methylphenol 0.5% and octylbutyl diphenylamine 0.5%;

[0082] The preparation method of the silicon steel plate cold rolling oil is:

[0083] Add 150SN, KN4006#, 2-ethylhexyl oleate and 2-ethylhexyl stearate into the blending kettle, heat to 60°C, stir evenly, and then add sulfurized lard YD-1810C, dialkyl pentasulfide RC2540, tricresyl phosphate, fatty alcohol ethoxylated phosphate ester in turn. AL200, alkenyl succinate T747, calcium petroleum sulfonate, 2,6-di-tert-butyl-p-methylphenol and octylbutyl diphenylamine were added to the blending kettle and stirred until completely dissolved. AEO-3, AEO-9 and Hypermer TM A70 is added into the system and stirred thoroughly until it becomes translucent to obtain silicon steel sheet cold rolling oil.

[0084] Example 3

[0085] The composition of the cold rolling rolling oil for silicon steel sheets is by mass percentage: 10% of 250SN, 17% of KN4006#, 40% of isooctyl oleate, 20% of isooctyl stearate, 2% of sulfurized lard YD-1810C, 1% of dihydrocarbyl pentasulfide RC2540, 0.7% of tricresyl phosphate, fatty alcohol ethoxylated phosphate AL 200 0.7%, AEO-3 6%, AEO-9 1%, Hypermer TM A70 0.5%, benzotriazole 0.1%, alkenyl succinic acid ester T747 0.5%, 2,6-di-tert-butyl-p-cresol 0.25% and octyl butyl diphenylamine 0.25%;

[0086] The preparation method of the cold rolling rolling oil for silicon steel sheets is as follows:

[0087] Add 250SN, KN4006#, isooctyl oleate and isooctyl stearate into a blending kettle, heat up to 60°C, and after stirring evenly, successively add sulfurized lard YD-1810C, dihydrocarbyl pentasulfide RC2540, tricresyl phosphate, fatty alcohol ethoxylated phosphate AL 200, benzotriazole, alkenyl succinic acid ester T747, 2,6-di-tert-butyl-p-cresol and octyl butyl diphenylamine into the blending kettle, stir well until completely dissolved, and then add AEO-3, AEO-9 and Hypermer TM A70 into the system, stir well until it becomes translucent to obtain the cold rolling rolling oil for silicon steel sheets.

[0088] Example 4

[0089] The composition of the cold rolling rolling oil for silicon steel sheets is by mass percentage:

[0090] 10% of 250SN, 20% of KN4006#, 40% of isooctyl oleate, 20% of isooctyl stearate, 1% of sulfurized lard YD-1810C, 1% of dihydrocarbyl pentasulfide RC2540, amine salt of phosphate 672 0.7%, fatty alcohol ethoxylated phosphate AL200 0.7%, AEO-3 4%, AEO-9 1%, Hypermer TM A70 0.5%, benzotriazole 0.1%, alkenyl succinic acid ester T747 0.5%, 2,6-di-tert-butyl-p-cresol 0.25% and octyl butyl diphenylamine 0.25%;

[0091] The preparation method of the cold rolling rolling oil for silicon steel sheets is as follows:

[0092] Add 250SN, KN4006#, isooctyl oleate and isooctyl stearate into a blending kettle, heat up to 60 °C, and after stirring evenly, successively add sulfurized lard YD-1810C, dialkyl pentasulfide RC2540, amine salt of phosphate ester, and fatty alcohol ethoxylated phosphate AL 200, benzotriazole, alkenyl succinic acid ester T747, 2,6-di-tert-butyl-p-cresol and octyl butyl diphenylamine into the blending kettle, stir fully until completely dissolved, and then add AEO-3, AEO-9 and Hypermer TM A70 into the system, stir fully and evenly until it becomes semi-transparent to obtain cold rolling oil for silicon steel sheets.

[0093] Example 5

[0094] The composition of the cold rolling oil for silicon steel sheets by mass percentage is: 150SN 10%, KN4006# 20%, isooctyl oleate 20%, isooctyl stearate 38%, sulfurized lard YD-1810C 1.5%, dialkyl pentasulfide RC2540 1%, tricresyl phosphate 0.8%, fatty alcohol ethoxylated phosphate AL200 0.7%, AEO-3 5%, AEO-9 1%, Hypermer TM A70 0.5%, alkenyl succinic acid ester T747 0.5%, calcium petroleum sulfonate 0.5%, 2,6-di-tert-butyl-p-cresol 0.25% and octyl butyl diphenylamine 0.25%;

[0095] The preparation method of the cold rolling oil for silicon steel sheets is as follows:

[0096] Add 150SN, KN4006#, isooctyl oleate and isooctyl stearate into a blending kettle, heat up to 60 °C, and after stirring evenly, successively add sulfurized lard YD-1810C, dialkyl pentasulfide RC2540, tricresyl phosphate, fatty alcohol ethoxylated phosphate AL 200, alkenyl succinic acid ester T747, calcium petroleum sulfonate, 2,6-di-tert-butyl-p-cresol and octyl butyl diphenylamine into the blending kettle, stir fully until completely dissolved, and then add AEO-3, AEO-9 and Hypermer TM A70 into the system, stir fully and evenly until it becomes semi-transparent to obtain cold rolling oil for silicon steel sheets.

[0097] Comparative Example 1

[0098] Commercially available product QUAKEROL OKL 1.0.

[0099] Comparative Example 2

[0100] Commercially available product Shark 716.

[0101] The performance indexes of the cold-rolled rolling oils for silicon steel sheets prepared in Examples 1 to 5 and the oils in Comparative Examples 1 to 2 were detected according to relevant standards and testing methods, and the results are shown in Tables 1 to 9 and Figures 1 to 7 as follows.

[0102] Figures 1 to 7 The particle size distribution curves of the emulsions after dilution with water of the cold-rolled rolling oils for silicon steel sheets prepared in Examples 1 to 5 and the commercially available products in Comparative Examples 1 to 2 are shown respectively. The preparation method of the emulsion is to weigh 294 g of distilled water in a 500 mL beaker, heat it to 50 °C, add 6 g of oil, and stir with an IKA T25 basic high-speed disperser at a rotation speed of 8000 rpm for 5 min to prepare an emulsion with a concentration of 2 wt%.

[0103] Table 1 Physical and chemical indexes of the cold-rolled rolling oils for silicon steel sheets prepared in Examples 1 to 5 and the commercially available products in Comparative Examples 1 to 2

[0104]

[0105]

[0106] Table 2 Main properties of the cold-rolled rolling oils for silicon steel sheets prepared in Examples 1 to 5 and the commercially available products in Comparative Examples 1 to 2

[0107]

[0108] Table 3 Particle size distribution table of the emulsion after dilution with water of the cold-rolled rolling oil for silicon steel sheets prepared in Example 1

[0109] Particle size μm Content % 5.000 2.09 10.00 2.19 20.00 2.20 45.00 5.64 75.00 27.95 100.0 51.92 200.0 92.05 300.0 99.12 400.0 99.97 500.0 100.00

[0110] Table 4 Particle size distribution table of the emulsion after dilution with water of the cold-rolled rolling oil for silicon steel sheets prepared in Example 2

[0111] Particle size μm Content % 0.500 0.56 1.000 1.56 2.000 2.38 5.000 3.47 10.00 4.71 20.00 10.67 45.00 38.08 75.00 81.90 100.0 97.38 200.0 100.00

[0112] Table 5 Particle size distribution table of the emulsion after dilution with water of the cold-rolled rolling oil for silicon steel sheets prepared in Example 3

[0113]

[0114]

[0115] Table 6 Particle size distribution table of the emulsion after dilution with water of the cold-rolled rolling oil for silicon steel sheets prepared in Example 4

[0116] Particle size μm Content % 1.000 1.25 2.000 2.43 5.000 4.07 10.00 5.15 20.00 5.53 45.00 10.56 75.00 36.01 100.0 60.57 200.0 95.88 300.0 100.00

[0117] Table 7 Particle size distribution table of the emulsion after dilution with water of the cold rolling rolling oil for silicon steel sheets prepared in Example 5

[0118] Particle size μm Content % 2.000 1.65 5.000 2.20 10.00 2.23 20.00 2.33 45.00 7.93 75.00 38.00 100.0 64.29 200.0 95.52 300.0 99.91 400.0 100.00

[0119] Table 8 Particle size distribution table of the emulsion after dilution with water of the commercially available product in Comparative Example 1

[0120]

[0121]

[0122] Particle size μm Content % 0.200 0.00 0.500 0.45 1.000 4.26 2.000 7.55 5.000 12.57 10.00 24.18 20.00 54.92 45.00 93.99 75.00 99.86 100.0 100.00

[0123] Table 9 Particle size distribution table of the emulsion after dilution with water of the commercially available product in Comparative Example 2

[0124] From Figures 1 to 7 As can be seen from Tables 1 to 9, the cold rolling rolling oil for silicon steel sheets provided by the present invention has excellent lubricating performance, rust prevention property and high temperature ablation volatility, thus effectively ensuring the cleanliness requirements of the silicon steel sheet surface after cold rolling and annealing.

[0125] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A silicon steel plate cold rolling oil, comprising, by mass percentage: Mineral oil 20-40%, Synthetic ester 40-60%, Extreme pressure lubricant 2-6%, Anti-wear and friction reducing agent 1-2%, Emulsifier 5-8%, Rust inhibitor 0.5~2% and antioxidant 0.5-3%; The emulsifier includes a polymer emulsifier.

2. The silicon steel sheet cold rolling oil according to claim 1, characterized in that: The composition includes by mass percentage: Mineral oil 25-37%, Synthetic ester 45-55%, Extreme pressure lubricant 3-5%, Anti-wear and friction reducing agent 1.2~1.8%, Emulsifier 5.5~7.5%, Rust inhibitor 0.8~1.6% And antioxidant 0.8-2%.

3. The silicon steel sheet cold rolling oil according to claim 1 or 2, characterized in that: The mineral oil includes at least one of a paraffin-based mineral oil and a naphthenic mineral oil.

4. The silicon steel sheet cold rolling oil according to claim 1 or 2, characterized in that: The synthetic ester includes at least one of isooctyl oleate and isooctyl stearate.

5. The silicon steel sheet cold rolling oil according to claim 1 or 2, characterized in that: The extreme pressure lubricant includes at least one of sulfurized lard and sulfurized olefin.

6. The silicon steel sheet cold rolling oil according to claim 1 or 2, characterized in that: The anti-wear and friction reducing agent comprises at least one of tricresyl phosphate, fatty alcohol ethoxylated phosphate and phosphate amine salt.

7. The silicon steel sheet cold rolling oil according to claim 1 or 2, characterized in that: The emulsifier also includes fatty alcohol polyoxyethylene ether.

8. The silicon steel sheet cold rolling oil according to claim 1 or 2, characterized in that: The rust inhibitor includes at least one of benzotriazole, alkenyl succinate and calcium petroleum sulfonate.

9. The silicon steel sheet cold rolling oil according to claim 1 or 2, characterized in that: The antioxidants are 2,6-di-tert-butyl-p-methylphenol and octylbutyldiphenylamine.

10. The method for preparing the cold rolling oil for silicon steel sheet according to any one of claims 1 to 9, comprising: Silicon steel plate cold rolling oil is obtained by mixing mineral oil, synthetic ester, extreme pressure lubricant, anti-wear and friction reducer, emulsifier, rust inhibitor and antioxidant.

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