A rolling fluid composition and its application

Abstract

The present disclosure relates to a rolling fluid composition and its application. The composition raw materials of the rolling fluid composition include: 10 - 15 parts by weight of mineral oil, 68.5 - 73.5 parts by weight of synthetic ester, 1.5 - 4.5 parts by weight of antioxidant, 1 - 3 parts by weight of rust inhibitor, 2 - 5 parts by weight of extreme pressure lubricant, 2 - 3 parts by weight of emulsifier, and 0.5 - 1 part by weight of annealing detergent. The rolling fluid composition provided by the present disclosure has good cleaning property, lubricity, dispersibility, rust prevention property and annealing cleaning property. When applied to the cold rolling process of plain carbon steel, it can effectively improve the problem of plate surface cleanliness in the case of high-speed large reduction rolling, reduce the amount of residual oil and iron on the plate surface after rolling, reduce the frictional wear of the roll and the strip steel, reduce the amount of iron powder generated, and obtain cold-rolled strip steel products with excellent plate surface quality.

Description

Technical Field

[0001] The present disclosure relates to the technical field of cold rolling, and particularly relates to a rolling fluid composition and its application. Background Art

[0002] Plain carbon steel mainly refers to an iron-carbon alloy carbon steel with a carbon mass fraction less than 2.11%. In addition to carbon, it generally also contains a small amount of silicon, manganese, sulfur, phosphorus, etc. Plain carbon steel can be divided into low-carbon steel (carbon content ≤ 0.25%), medium-carbon steel (0.25% < carbon content ≤ 0.6%), and high-carbon steel (carbon content > 0.6%) according to the carbon content. Generally, the higher the carbon content in plain carbon steel, the greater the hardness, the higher the strength, but the lower the plasticity.

[0003] Plain carbon steel rolling is a processing method in which rotating rolls apply pressure to the rolled piece under certain conditions to cause plastic deformation of the rolled piece. Cold rolling fluid is an essential process lubrication medium in the cold rolling process, which plays the roles of lubrication, cooling, cleaning, and rust prevention for the rolls and steel plates during the rolling process. In the carbon steel rolling process with high speed (1500 m / min) and large reduction (pass reduction rate > 30%), due to the high temperature in the rolling zone and harsh lubrication conditions, oxidation, decomposition, and high polymerization will occur during the use of cold rolling fluid, generating a large amount of sludge and fatty acid iron soap, which adhere to the rolling mill frame, rolls, and strip steel. On the one hand, it causes the production site to be adhered with oil stains, the environment to be dirty and messy, and safety problems are likely to occur. On the other hand, the sludge and iron soap adhering to the surfaces of the rolls and strip steel lead to surface quality defects such as uneven plate surface, foreign matter pressing in, and oil spots, resulting in product downgrading.

[0004] Therefore, it is particularly important to develop a rolling fluid with good cleaning performance and lubricating performance. Summary of the Invention

[0005] To solve the above technical problems, the present disclosure provides a rolling fluid composition and its application. The rolling fluid composition provided by the present disclosure has good cleaning property, lubricity, dispersibility, and annealing cleanliness, and can obtain cold-rolled strip steel with excellent finished product quality when applied to the plain carbon steel cold rolling process.

[0006] In the first aspect, the present disclosure provides a rolling fluid composition, and the composition raw materials of the rolling fluid composition include:

[0007]

[0008] Among them, the weight parts of the mineral oil can be 11 weight parts, 12 weight parts, 13 weight parts, 14 weight parts, etc.

[0009] The weight parts of the synthetic ester can be 69 weight parts, 70 weight parts, 71 weight parts, 72 weight parts, 73 weight parts, etc.

[0010] The weight parts of the antioxidant can be 2 parts by weight, 3 parts by weight, 4 parts by weight, etc.

[0011] The weight parts of the rust inhibitor can be 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, etc.

[0012] The weight parts of the extreme pressure lubricant can be 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, etc.

[0013] The weight parts of the emulsifier can be 2.2 parts by weight, 2.4 parts by weight, 2.6 parts by weight, 2.8 parts by weight, etc.

[0014] The weight parts of the annealing detergent can be 0.6 parts by weight, 0.7 parts by weight, 0.8 parts by weight, 0.9 parts by weight, etc.

[0015] The rolling fluid composition provided by the present disclosure has good detergency, lubricity, dispersibility, rust prevention and annealing detergency. When applied to the cold rolling process of plain carbon steel, it can effectively improve the problem of plate surface cleanliness in the case of high-speed large reduction rolling, reduce the amount of residual oil and iron on the plate surface after rolling, reduce the frictional wear between the roll and the strip steel, reduce the generation amount of iron powder, and obtain a cold-rolled strip steel product with excellent plate surface quality. At the same time, the good dispersibility facilitates the smooth filtration of iron powder sludge through equipment such as magnetic filtration and flat bed filtration, reducing the deposition of sludge.

[0016] As a preferred technical solution of the present disclosure, the synthetic ester is selected from the combination of long-chain synthetic esters and short-chain synthetic esters. The carbon chain length of the long-chain synthetic ester is selected from any integer in 20-22, and the carbon chain length of the short-chain synthetic ester is selected from any integer in 10-12.

[0017] Among them, the 20-22 can be 20, 21 or 22, and the 10-12 can be 10, 11, 12.

[0018] The synthetic ester provided by the present disclosure is a compound of long-chain synthetic esters and short-chain synthetic esters. Among them, the long-chain synthetic ester can provide sufficient lubrication, and the short-chain synthetic ester can ensure the cleaning performance of the steel plate surface, with less sludge and iron soap residue. At the same time, it has excellent hydrolysis stability and thermal stability, and does not produce hydrolysis or oxidation polymerization reactions of double bonds compared with vegetable oils. Therefore, impurities such as sludge and iron soap are not generated or are not easily generated during the rolling process.

[0019] As a preferred technical solution of the present disclosure, the long-chain synthetic ester is selected from trimethylolpropane arachidate and / or trimethylolpropane erucate.

[0020] As a preferred technical solution of the present disclosure, the short-chain synthetic ester is selected from any one or a combination of at least two of trimethylolpropane laurate, trimethylolpropane caprate, pentaerythritol laurate or pentaerythritol caprate.

[0021] As a preferred technical solution of the present disclosure, the mass ratio of the long-chain synthetic ester to the short-chain synthetic ester is 1:(1 - 1.5), such as 1:1.1, 1:1.2, 1:1.3, 1:1.4, etc.

[0022] As a preferred technical solution of the present disclosure, the mass ratio of the long-chain synthetic ester to the short-chain synthetic ester is 1:(1 - 1.2).

[0023] As a preferred technical solution of the present disclosure, the total weight of the rolling fluid composition is 100 parts by weight.

[0024] As a preferred technical solution of the present disclosure, the emulsifier is selected from cationic surfactants.

[0025] The cationic surfactant provided by the present disclosure has good cleaning and dispersing properties for sludge, iron soap and iron powder. Sludge, iron soap, iron powder, etc. are not easily adhered to the rolling mill frame, rolling rolls or strip steel, which can significantly improve the surface quality of the strip steel and make the processing environment clean and hygienic.

[0026] As a preferred technical solution of the present disclosure, the emulsifier is selected from fatty amine polyoxyethylene ether cationic surfactants.

[0027] As a preferred technical solution of the present disclosure, the emulsifier is selected from tallow amine polyoxyethylene ether and / or coconut oil amine polyoxyethylene ether.

[0028] Among them, the tallow amine polyoxyethylene ether can be T03, T05, etc.

[0029] As a preferred technical solution of the present disclosure, the antioxidant is selected from the combination of amine antioxidants and phenolic antioxidants.

[0030] The antioxidant provided by the present disclosure uses a combination of phenol and amine, and has excellent antioxidant effects.

[0031] As a preferred technical solution of the present disclosure, the amine antioxidant is selected from p-diphenylamine and / or alkyl diphenylamine.

[0032] As a preferred technical solution of the present disclosure, the phenolic antioxidant is selected from 2,6-di-tert-butyl-p-cresol.

[0033] As a preferred technical solution of the present disclosure, the mass ratio of the amine antioxidant to the phenolic antioxidant in the antioxidant is 1:(1 - 3), such as 1:1.5, 1:2, 1:2.5, etc., and preferably 1:2.

[0034] As a preferred technical solution of the present disclosure, the rust inhibitor is selected from any one or a combination of at least two of sodium petroleum sulfonate, barium petroleum sulfonate, or octadecyl ammonium oleoyl sarcosinate.

[0035] As a preferred technical solution of the present disclosure, the rust inhibitor is selected from octadecyl ammonium oleoyl sarcosinate.

[0036] As a preferred technical solution of the present disclosure, the extreme pressure lubricant is selected from the combination of a phosphorus-containing lubricant and a sulfur-containing lubricant.

[0037] As a preferred technical solution of the present disclosure, the phosphorus-containing lubricant is selected from any one or a combination of at least two of lauryl alcohol polyether phosphate, oleyl alcohol phosphate, or dodecyl ammonium methyl phosphate.

[0038] As a preferred technical solution of the present disclosure, the sulfur-containing lubricant is selected from sulfurized lard and / or methyl sulfonated fatty acid ester.

[0039] As a preferred technical solution of the present disclosure, the mass ratio of the phosphorus-containing lubricant to the sulfur-containing lubricant is 1:(3 - 5), such as 1:3.5, 1:4, 1:4.5, etc., and further preferably 1:4.

[0040] As a preferred technical solution of the present disclosure, the annealing detergent is selected from dodecylamine and / or hexadecylamine.

[0041] The rust inhibitor and annealing detergent provided by the present disclosure endow the prepared rolling fluid with good rust prevention and annealing detergency, preventing surface quality problems such as surface rust and black spots during the storage or annealing stage of the rolled steel plate, thereby obtaining cold-rolled strip steel with good surface quality.

[0042] As a preferred technical solution of the present disclosure, the mineral oil is selected from any one or a combination of at least two of 70N, 100N, 150N, or 250N.

[0043] The mineral oil provided by the present disclosure has excellent antioxidant and hydrolysis resistance properties.

[0044] In a second aspect, the present disclosure provides a method for preparing the rolling fluid composition according to the first aspect, comprising the following steps:

[0045] (1) Add the mineral oil, synthetic ester, and antioxidant into a reaction kettle equipped with a stirrer and a temperature sensor, stir and heat up to 50 - 60 °C, and continue stirring until completely dissolved;

[0046] (2) Add the rust inhibitor, extreme pressure lubricant, emulsifier, and annealing detergent and continue stirring until uniform;

[0047] (3) Continuously stir until the system cools to room temperature to obtain the plain carbon steel cold rolling rolling fluid composition.

[0048] In a third aspect, the present disclosure provides an application of the rolling fluid composition described in the first aspect in the high-speed cold rolling process of plain carbon steel in a single-stand reversing mill or a multi-stand continuous rolling mill.

[0049] The technical solutions provided by the embodiments of the present disclosure have the following advantages compared with the prior art:

[0050] The rolling fluid composition provided by the present disclosure has good detergency, lubricity, dispersibility, rust prevention, and annealing cleanliness. When applied to the plain carbon steel cold rolling process, it can effectively improve the problem of sheet surface cleanliness under high-speed and large reduction rolling conditions, reduce the amount of residual oil and iron on the sheet surface after rolling, reduce the frictional wear between the roll and the strip, reduce the amount of iron powder generated, and obtain cold-rolled strip products with excellent sheet surface quality. Specific Embodiments

[0051] In order to more clearly understand the above objects, features, and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0052] Many specific details are set forth in the following description to facilitate a thorough understanding of the present disclosure, but the present disclosure may be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all the embodiments.

[0053] All the chemical reagents used in the present disclosure are commercially available, and the sources of some chemical reagents are listed below:

[0054] 70N: CNOOC Huizhou Petrochemical Co., Ltd.

[0055] 100N: CNOOC Huizhou Petrochemical Co., Ltd.

[0056] 150N: CNOOC Huizhou Petrochemical Co., Ltd.

[0057] 250N: CNOOC Huizhou Petrochemical Co., Ltd.

[0058] Trimethylolpropane arachidate: LANXESS Chemical (China) Co., Ltd.

[0059] Trimethylolpropane erucate: LANXESS Chemical (China) Co., Ltd.

[0060] Trimethylolpropane laurate: LANXESS Chemical (China) Co., Ltd.

[0061] Trimethylolpropane querolate: LANXESS Chemical (China) Co., Ltd.

[0062] Pentaerythritol laurate: LANXESS Chemical (China) Co., Ltd.

[0063] Pentaerythritol cinnamate: LANXESS Chemical (China) Co., Ltd.

[0064] Octadecyl oleoyl sarcosinate: Rugao Xilin Chemical Co., Ltd.

[0065] Sodium petroleum sulfonate: Daohua Chemical Co., Ltd.

[0066] Barium petroleum sulfonate: Daohua Chemical Co., Ltd.

[0067] T03: Solvay Chemicals (Shanghai) Co., Ltd.

[0068] T05: Solvay Chemicals (Shanghai) Co., Ltd.

[0069] Alkyldiphenylamine: Jinzhou Xinxing Petroleum Additive Co., Ltd.

[0070] 2,6-Di-tert-butyl-p-cresol: Jinzhou Xinxing Petroleum Additive Co., Ltd.

[0071] Coconut amine polyoxyethylene ether: Haian Petroleum Chemical Factory

[0072] Lauryl alcohol polyether phosphate: Haian Petroleum Chemical Factory

[0073] Oleyl alcohol phosphate: Xirui Special Chemical Co., Ltd.

[0074] Dodecyl ammonium methanol phosphate: Haian Petroleum Chemical Factory

[0075] Sulfurized lard: Xirui Special Chemical Co., Ltd.

[0076] Sulfurized fatty acid methyl ester: Xirui Special Chemical Co., Ltd.

[0077] Dodecylamine: Haian Petroleum Chemical Factory

[0078] Hexadecylamine: Haian Petroleum Chemical Factory

[0079] Alcohol polyoxyethylene ether AEO-3: Yangzi BASF Co., Ltd.

[0080] Example 1

[0081] This example provides a rolling fluid composition and its preparation method. The weight parts of each raw material component are as follows:

[0082]

[0083] The mineral oil is 70N, the synthetic ester is a mixture of trimethylolpropane arachidate and trimethylolpropane laurate with a mass ratio of 1:1.2, the antioxidant is a mixture of p-phenylenediamine and 2,6-di-tert-butyl-p-cresol with a mass ratio of 1:2, the rust inhibitor is octadecyl oleoyl sarcosinate, the extreme pressure lubricant is a mixture of lauryl alcohol polyether phosphate and methyl ester of sulfurized fatty acid with a mass ratio of 1:4, the emulsifier is tallow amine polyoxyethylene ether T03, and the annealing detergent is dodecylamine.

[0084] The preparation method comprises the following steps:

[0085] 1. Take 70N, trimethylolpropane arachidate, trimethylolpropane laurate, p-phenylenediamine, and 2,6-di-tert-butyl-p-cresol according to the ratios of the respective constituent raw materials provided in this embodiment, and add them respectively to a reaction kettle equipped with a stirrer and a temperature sensor. Stir and heat up to 50 - 60 °C, and continue stirring until completely dissolved;

[0086] 2. Add octadecyl oleoyl sarcosinate, lauryl alcohol polyether phosphate, methyl ester of sulfurized fatty acid, tallow amine polyoxyethylene ether T03, and dodecylamine, and continue stirring until homogeneous;

[0087] 3. Continuously stir until the system cools to room temperature to obtain the cold rolling rolling fluid composition for plain carbon steel.

[0088] Example 2

[0089] This example provides a rolling fluid composition and its preparation method. The weight parts of the respective constituent raw materials are:

[0090]

[0091] The mineral oil is 100N, the synthetic ester is a mixture of trimethylolpropane erucate and trimethylolpropane querolate with a mass ratio of 1:1, the antioxidant is a mixture of alkyl diphenylamine and 2,6-di-tert-butyl-p-cresol with a mass ratio of 1:1, the rust inhibitor is sodium petroleum sulfonate, the extreme pressure lubricant is a mixture of dodecyl ammonium methyl phosphate and sulfurized lard with a mass ratio of 1:4, the emulsifier is coconut amine polyoxyethylene ether, and the annealing detergent is hexadecylamine.

[0092] The preparation method is the same as that of Example 1.

[0093] Example 3

[0094] This example provides a rolling fluid composition and its preparation method. The weight parts of the respective constituent raw materials are:

[0095]

[0096] The mineral oil is 150N, the synthetic ester is a mixture of trimethylolpropane erucate and pentaerythritol laurate with a mass ratio of 1:1.5, the antioxidant is a mixture of alkyl diphenylamine and 2,6-di-tert-butyl-p-cresol with a mass ratio of 1:3, the rust inhibitor is barium petroleum sulfonate, the extreme pressure lubricant is a mixture of oleyl alcohol phosphate and methyl sulfofatty acid ester with a mass ratio of 1:4, the emulsifier is tallow amine polyoxyethylene ether T05, and the annealing detergent is hexadecylamine.

[0097] The preparation method is the same as that of Example 1.

[0098] Example 4

[0099] This example provides a rolling fluid composition and a preparation method thereof. The weight parts of each constituent raw material are as follows:

[0100]

[0101] The mineral oil is 250N, the synthetic ester is a mixture of trimethylolpropane arachidate and pentaerythritol cinnamate with a mass ratio of 1:1.1, the antioxidant is a mixture of p-diphenylamine and 2,6-di-tert-butyl-p-cresol with a mass ratio of 1:2, the rust inhibitor is octadecyl oleoyl sarcosinate, the extreme pressure lubricant is a mixture of dodecylammonium methanol phosphate and methyl sulfofatty acid ester with a mass ratio of 1:4, the emulsifier is tallow amine polyoxyethylene ether T03, and the annealing detergent is dodecylamine.

[0102] The preparation method is the same as that of Example 1.

[0103] Example 5

[0104] This example provides a rolling fluid composition and a preparation method thereof. The difference from Example 4 is that in this example, the weight parts of each constituent raw material are as follows:

[0105]

[0106]

[0107] Comparative Examples 1-2

[0108] This comparative example provides a rolling fluid composition and a preparation method thereof. The difference from Example 5 is that in this comparative example, the synthetic esters are trimethylolpropane arachidate (Comparative Example 1) and pentaerythritol cinnamate (Comparative Example 2) respectively.

[0109] Comparative Example 3

[0110] This comparative example provides a rolling fluid composition and a preparation method thereof. The difference from Example 5 is that in this comparative example, the synthetic ester is replaced with coconut oil.

[0111] Comparative Example 4

[0112] This comparative example provides a rolling fluid composition and a preparation method thereof. The difference from Example 5 is that in this comparative example, the synthetic ester is a mixture of trimethylolpropane oleate and pentaerythritol decanoate with a mass ratio of 1:1.1.

[0113] Comparative Example 5

[0114] This comparative example provides a rolling fluid composition and a preparation method thereof. The difference from Example 5 is that in this comparative example, the dosages of the antioxidant and the emulsifier are respectively:

[0115] Antioxidant: 1.0 part by weight;

[0116] Emulsifier: 3.0 parts by weight.

[0117] Comparative Example 6

[0118] This comparative example provides a rolling fluid composition and a preparation method thereof. The difference from Example 5 is that in this comparative example, the dosages of the mineral oil and the synthetic ester are respectively:

[0119] Mineral oil: 20 parts by weight;

[0120] Synthetic ester: 68.5 parts by weight.

[0121] Comparative Examples 7 - 8

[0122] This comparative example provides a rolling fluid composition and a preparation method thereof. The difference from Example 5 is that in this comparative example, the antioxidants are p - phenylenediamine (Comparative Example 7) and 2,6 - di - tert - butyl - p - cresol (Comparative Example 8) respectively.

[0123] Comparative Example 9

[0124] This comparative example provides a rolling fluid composition and a preparation method thereof. The difference from Example 5 is that in this comparative example, the emulsifier T03 is replaced with the non - ionic emulsifier fatty alcohol polyoxyethylene ether AEO - 3.

[0125] Performance Test 1

[0126] The rolling fluid compositions obtained in Examples 1 - 5 and Comparative Examples 1 - 9 were subjected to the maximum non - seizure load P B test. The test method was carried out with reference to the national standard GB / T12583, and the test results are shown in Table 1.

[0127] Performance Test 2

[0128] The rolling fluid compositions obtained in Examples 1-5 and Comparative Examples 1-9 were subjected to lubrication performance tests. The test conditions were: a reciprocating friction and wear testing machine, a load of 1.1 GPa, and a temperature of 150 °C. The test results are shown in Table 1.

[0129] Performance Test 3

[0130] The rolling fluid compositions obtained in Examples 1-5 and Comparative Examples 1-9 were subjected to antioxidant tests. The test method was carried out with reference to the industry standard SH / T 0193. The test results are shown in Table 1.

[0131] Performance Test 4

[0132] The rolling fluid compositions obtained in Examples 1-5 and Comparative Examples 1-9 were subjected to dispersibility tests for sludge iron powder. For the test, 100 mL of 2% newly prepared rolling fluid was taken, 0.5 g of magnetically filtered sludge and 0.5 g of iron powder with a particle size of 1 μm were added to a stoppered graduated cylinder, and it was shaken vigorously 30 times. The dispersion of the emulsion for the sludge iron powder was observed. The test results are shown in Table 1.

[0133] Performance Test 5

[0134] The rolling fluid compositions obtained in Examples 1-5 and Comparative Examples 1-9 were subjected to simulated annealing residue tests. The test method was carried out using TGA, with a heating rate of 25 °C / min, a hydrogen atmosphere, and the temperature was raised to 450 °C. The test results are shown in Table 1.

[0135] Table 1

[0136]

[0137] As can be seen from Table 1, the rolling fluid compositions prepared in this application have excellent P B , lubricity, antioxidant property, dispersibility, and annealing cleanliness.

[0138] In Comparative Example 1, all synthetic esters used long-chain esters. The P B , lubrication performance, and antioxidant performance of the rolling fluid composition were less affected. However, the long-chain esters have a high boiling point and poor cleanliness, and the simulated annealing residue is as high as 4.75% at 450 °C, significantly affecting the annealing cleanliness of the rolling fluid.

[0139] In Comparative Example 2, all synthetic esters used short-chain esters. The simulated annealing residue of the rolling fluid composition was significantly lower at 450 °C, proving that the short-chain esters have a low boiling point and good cleanliness. However, the short-chain esters have poor film-forming properties, and the P B , lubrication performance of the rolling fluid composition were both greatly affected.

[0140] In Comparative Example 3, coconut oil was used to replace the synthetic ester. It was found that after using natural coconut oil with a shorter carbon chain, the simulated annealing residue of the rolling fluid composition was not affected at 450 °C. However, due to the short carbon chain and unsaturated structure in the coconut oil structure, the P B , lubricating performance, and antioxidant property of the rolling fluid composition were all greatly affected.

[0141] In Comparative Example 4, trimethylolpropane oleate and pentaerythritol caprate were used to replace the synthetic ester, and the P B , lubricity, and antioxidant property of the rolling fluid composition were all significantly reduced; the poor antioxidant property led to easy oxidation and agglomeration of the rolling fluid, resulting in a significant increase in the simulated annealing residue at 450 °C.

[0142] In Comparative Example 5, the dosage of the antioxidant was too low, and the P B , lubricity of the rolling fluid composition were not significantly affected, but the antioxidant property and the simulated annealing residue at 450 °C were significantly deteriorated.

[0143] In Comparative Example 6, the dosage of the mineral oil was too high, and the antioxidant property and the simulated annealing residue at 450 °C of the rolling fluid composition were improved, but the P B , lubricity were significantly reduced.

[0144] In Comparative Examples 7 and 8, only one antioxidant was used respectively, and the P B , lubricity of the rolling fluid composition were not affected, but the antioxidant property and the simulated annealing residue at 450 °C deteriorated in performance.

[0145] In Comparative Example 9, non-ionic fatty alcohol polyoxyethylene ether was used, and the P B , lubricity, antioxidant property, and the residue of the simulated annealing at 450 °C of the rolling fluid composition did not change significantly, but the dispersibility of the iron powder sludge was significantly deteriorated, and a large amount of iron powder sludge agglomerated, which was not conducive to the cleanliness of the cold-rolled strip steel surface and the equipment.

[0146] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0147] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rolling fluid composition, characterized in that, the composition raw materials of the rolling fluid composition include: the synthetic ester is selected from the combination of long-chain synthetic esters and short-chain synthetic esters, the carbon chain length of the long-chain synthetic ester is selected from any integer in 20-22, the carbon chain length of the short-chain synthetic ester is selected from any integer in 10-12, the mass ratio of the long-chain synthetic ester to the short-chain synthetic ester is 1:(1-1.5), the long-chain synthetic ester is selected from trimethylolpropane arachidate and / or trimethylolpropane erucate, and the short-chain synthetic ester is selected from trimethylolpropane laurate and / or pentaerythritol laurate; the antioxidant is selected from the combination of amine antioxidants and phenolic antioxidants, the amine antioxidant is selected from p-diphenylamine and / or alkyl diphenylamine, the phenolic antioxidant is selected from 2,6-di-tert-butyl-p-cresol, and the mass ratio of the amine antioxidant to the phenolic antioxidant in the antioxidant is 1:(1-3); the rust inhibitor is selected from any one or a combination of at least two of sodium petroleum sulfonate, barium petroleum sulfonate or octadecyl oleoyl sarcosinate; the total weight of the rolling fluid composition is 100 parts by weight.

2. The rolling fluid composition according to claim 1, characterized in that, the mass ratio of the long-chain synthetic ester to the short-chain synthetic ester is 1:(1-1.2).

3. The rolling fluid composition according to claim 1, characterized in that, the emulsifier is tallow amine polyoxyethylene ether and / or coconut oil amine polyoxyethylene ether.

4. The rolling fluid composition according to claim 1, characterized in that, the mass ratio of the amine antioxidant to the phenolic antioxidant in the antioxidant is 1:

2.

5. The rolling fluid composition according to claim 1, characterized in that, the rust inhibitor is octadecyl oleoyl sarcosinate.

6. The rolling fluid composition according to claim 1, characterized in that, the extreme pressure lubricant is selected from the combination of phosphorus-containing lubricants and sulfur-containing lubricants.

7. The rolling fluid composition according to claim 6, characterized in that, the phosphorus-containing lubricant is selected from any one or a combination of at least two of lauryl alcohol polyether phosphate, oleyl alcohol phosphate or dodecyl ammonium methanol phosphate.

8. The rolling fluid composition according to claim 6, characterized in that, the sulfur-containing lubricant is selected from sulfurized lard and / or methyl sulfurized fatty acid ester.

9. The rolling fluid composition according to any one of claims 6-8, characterized in that, the mass ratio of the phosphorus-containing lubricant to the sulfur-containing lubricant is 1:(3-5).

10. The rolling fluid composition according to any one of claims 6-8, characterized in that, the mass ratio of the phosphorus-containing lubricant to the sulfur-containing lubricant is 1:

4.

11. The rolling fluid composition according to claim 1, characterized in that, the annealing detergent is selected from dodecylamine and / or hexadecylamine.

12. The rolling fluid composition according to claim 1, characterized in that, the mineral oil is selected from any one or a combination of at least two of 70N, 100N, 150N or 250N.

13. Use of the rolling fluid composition according to any one of claims 1 to 12 in the high-speed cold rolling process of plain carbon steel in a single-stand reversing mill or a multi-stand continuous rolling mill.

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