Stainless steel pipe rolling oil and its preparation method and application
By compounding stainless steel pipe rolling oil containing chlorine, sulfur, phosphorus extreme pressure agents and phenolic amine antioxidants, the problems of insufficient lubrication and cleaning effects have been solved, resulting in a rolling oil with high PB value and low odor, which meets the processing requirements of stainless steel pipes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2024-12-17
- Publication Date
- 2026-06-19
Smart Images
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Abstract
Description
Technical Field
[0001] This invention relates to the field of metal processing technology, and in particular to a stainless steel pipe rolling oil, its preparation method, and its application. Background Technology
[0002] Steel pipes are hollow, long steel products, widely used as pipelines for transporting fluids and also extensively used in the manufacture of mechanical parts and engineering structures. In recent years, the rapid development of my country's construction, oil and gas, chemical, coal, and power industries has greatly promoted the growth of steel pipe consumption and driven the development of domestic steel pipe manufacturers.
[0003] Steel pipes are generally divided into two main categories: seamless steel pipes and welded steel pipes (seamed pipes). In recent years, due to the surge in demand for oil pipes, boiler tubes, etc., the consumption growth rate of seamless steel pipes has exceeded that of welded steel pipes. Large-diameter seamless steel pipes are mainly produced through hot rolling; small and medium-diameter seamless steel pipes are mainly produced by hot rolling piercing or continuous casting and rolling to form pipes, followed by cold rolling or cold drawing processes.
[0004] In the cold rolling process of seamless steel pipes, a stainless steel pipe rolling oil is required to provide good lubrication and protection during processing deformation, while also promptly removing the heat generated during processing. There are significant differences between the rolling oils used for stainless steel pipes and stainless steel plates. Stainless steel pipes experience relatively higher processing loads and require higher lubrication standards, while the rolling oils used for stainless steel plates require higher cleanliness.
[0005] Chinese patent CN 103275792 A discloses an environmentally friendly stainless steel pipe rolling oil, mainly composed of composite base oil, antioxidant, extreme pressure agent, oiliness agent, rust inhibitor, and antifoaming agent. This composition uses a high proportion of composite base oil (synthetic ester), but its lubrication effect is poor, especially its PB value is low.
[0006] Chinese patent CN 106281593 A discloses a stainless steel pipe rolling oil, mainly composed of base oil, anti-wear agent, oiliness agent, rust inhibitor, etc. This composition contains sulfurized isobutylene extreme pressure agent, which, although possessing good extreme pressure lubrication effects, uses an active sulfur extreme pressure agent, resulting in a strong odor. Summary of the Invention
[0007] To address the aforementioned problems in the prior art, the present invention aims to provide a stainless steel pipe rolling oil, its preparation method, and its application. This stainless steel pipe rolling oil exhibits excellent lubrication, particularly a high PB value, does not use active sulfur extreme pressure agents, has a low odor, and also provides good cleaning performance, thus meeting the requirements of stainless steel pipe rolling processes.
[0008] Therefore, in a first aspect, the present invention provides a stainless steel pipe rolling oil, comprising, by weight, the following components:
[0009] a) 5-30 parts base oil;
[0010] b) 8-16 parts of oily agent;
[0011] c) 60-82 parts of extreme pressure agent;
[0012] d) 0.5 to 1 part antioxidant;
[0013] The oily agent includes natural oils and synthetic esters, the extreme pressure agent includes chlorine-containing extreme pressure agent, sulfur-containing extreme pressure agent and phosphorus-containing extreme pressure agent, and the antioxidant includes phenolic antioxidants and amine antioxidants.
[0014] Specifically, the stainless steel pipe rolling oil provided by this invention uses an extreme pressure agent composed of a compound of chlorine-containing extreme pressure agents, sulfur-containing extreme pressure agents, and phosphorus-containing extreme pressure agents, and increases the proportion of extreme pressure agents in the stainless steel pipe rolling oil. The antioxidant is a compound of phenolic antioxidants and amine antioxidants. The resulting stainless steel pipe rolling oil has excellent lubrication performance, especially with a high PB value. It does not use active sulfur extreme pressure agents, has a low odor, and simultaneously has good cleaning and anti-oxidation effects, thus meeting the requirements of stainless steel pipe rolling processing.
[0015] As a specific embodiment of the present invention, preferably, the composition includes the following components: a) 8 to 23 parts of base oil.
[0016] As a specific embodiment of the present invention, preferably, the composition includes the following component: b) 12 to 14 parts of an oily agent.
[0017] As a specific embodiment of the present invention, preferably, the composition includes the following components: c) 64 to 82 parts of extreme pressure agent.
[0018] As a specific embodiment of the present invention, preferably, the composition includes the following component: d) 0.8 to 1 part of antioxidant.
[0019] In a specific embodiment of the present invention, preferably, the chlorine-containing extreme pressure agent is selected from at least one of chlorinated paraffin and chlorinated fatty acid esters.
[0020] As a specific embodiment of the present invention, preferably, the sulfur-containing extreme pressure agent is selected from at least one of sulfurized lard and 2,6-di-tert-butyl-4-bisxanthin alkylphenol.
[0021] As a specific embodiment of the present invention, preferably, the kinematic viscosity of the sulfurized lard at 40°C is 1000 mmHg. 2 / s~1200mm 2 / s, with a total sulfur content of 10wt% to 12wt%, of which the active sulfur content is less than 1wt%.
[0022] In a specific embodiment of the present invention, preferably, the carbon chain length of the alkyl groups at both ends of the bixanthan acid group in the 2,6-di-tert-butyl-4-bisxanthan acid alkylphenol is C4-C6.
[0023] As a specific embodiment of the present invention, preferably, the phosphorus-containing extreme pressure agent is selected from at least one of thiophosphate, ammonium thiophosphate salt and phosphate amine salt.
[0024] As a specific embodiment of the present invention, preferably, the thiophosphate is selected from dialkyl dithiophosphate, wherein each alkyl group is independently a straight-chain alkyl group of C8-C12.
[0025] As a specific embodiment of the present invention, preferably, the ammonium thiophosphate salt is selected from dialkyl dithiophosphate ammonium salt, wherein each alkyl group is independently a straight-chain alkyl group of C6-C10.
[0026] As a specific embodiment of the present invention, preferably, the alkylamine and alcohol used to synthesize the ammonium phosphate salt are each independently selected from cycloalkylamines and straight-chain fatty alcohols selected from C8-C12.
[0027] Specifically, the stainless steel pipe rolling oil provided by this invention uses a compound of a specific type of chlorine-containing extreme pressure agent, a specific type of sulfur-containing extreme pressure agent, and a specific type of phosphorus-containing extreme pressure agent as extreme pressure agents, which can further improve the performance of the stainless steel pipe rolling oil and ensure that the stainless steel pipe rolling oil has excellent lubrication performance, cleaning effect, and low odor.
[0028] In a specific embodiment of the present invention, preferably, the base oil is selected from paraffinic base oil.
[0029] As a specific embodiment of the present invention, preferably, the mass ratio of the natural oil and the high molecular weight synthetic ester is 1 to 10:1, more preferably 2 to 6:1.
[0030] As a specific embodiment of the present invention, preferably, the mass ratio of the chlorine-containing extreme pressure agent, the sulfur-containing extreme pressure agent and the phosphorus-containing extreme pressure agent is 58-78:1-3:2, more preferably 60-78:1-3:2, and even more preferably 60-78:2:2.
[0031] Specifically, the stainless steel pipe rolling oil provided by this invention uses a compound of chlorine-containing extreme pressure agent, sulfur-containing extreme pressure agent and phosphorus-containing extreme pressure agent as extreme pressure agent, which can further improve the performance of stainless steel pipe rolling oil, ensuring that stainless steel pipe rolling oil has excellent lubrication performance and cleaning effect, while having a low odor.
[0032] The mass ratio of the phenolic antioxidant to the amine antioxidant is 0.5 to 4:1, preferably 1 to 2:1.
[0033] As a specific embodiment of the present invention, preferably, the natural oil is selected from at least one of palm oil, lard, rapeseed oil, castor oil, soybean oil, oxidized rapeseed oil, peanut oil, and coconut oil.
[0034] As a specific embodiment of the present invention, preferably, the number-average molecular weight of the polymeric synthetic ester is 50,000 to 100,000 Daltons, and the kinematic viscosity at 40°C is 2300 mmHg. 2 / s~2700mm 2 / s, viscosity index greater than 140, preferably 140-200.
[0035] In a specific embodiment of the present invention, preferably, the phenolic antioxidant is selected from at least one of di-tert-butylphenol, di-tert-butyl-p-cresol, and methylene bis-tert-butylphenol.
[0036] As a specific embodiment of the present invention, preferably, the amine antioxidant is selected from at least one of monoalkyl diphenylamine, dialkyl diphenylamine, and styrenated diphenylamine.
[0037] Therefore, in a second aspect, the present invention provides a method for preparing the above-mentioned stainless steel pipe rolling oil, comprising the following steps: mixing base oil and chlorine-containing extreme pressure agent and heating to 50°C to 70°C, adding antioxidant, sulfur-containing extreme pressure agent and phosphorus-containing extreme pressure agent and mixing evenly, then adding oiliness agent and mixing evenly, and optionally cooling to room temperature to obtain rolling oil.
[0038] In a specific embodiment of the present invention, preferably, the room temperature is 10℃~30℃.
[0039] Therefore, in a third aspect, the present invention provides the above-mentioned stainless steel pipe rolling oil or the stainless steel pipe rolling oil prepared by the above-mentioned preparation method for use in stainless steel pipe rolling processing, preferably for use in stainless steel pipe cold rolling processing.
[0040] Beneficial effects:
[0041] The stainless steel pipe rolling oil provided by this invention employs a specific formula to increase the proportion of extreme pressure agents. These extreme pressure agents contain both chlorine-containing and specific sulfur-containing extreme pressure agents, while the antioxidants include both phenolic and amine antioxidants. The resulting stainless steel pipe rolling oil exhibits excellent lubrication, particularly a high PB value. It does not use active sulfur extreme pressure agents, has a low odor, and simultaneously possesses good cleaning and antioxidant properties, thus meeting the requirements of stainless steel pipe rolling processes. Detailed Implementation
[0042] The embodiments of the present invention will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are for illustrative purposes only and should not be considered as limiting the scope of the invention. Unless otherwise specified in the examples, conventional conditions or conditions recommended by the manufacturer are followed. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.
[0043] (I) Testing Methods
[0044] The maximum non-bite load PB value was determined using the GB / T 3142 method.
[0045] The rotating oxygen bomb was determined using the SH / T 0193 method.
[0046] The cleaning rate was determined according to JB / T 4323.2 method. The oil sample being tested (i.e. the product of the example and comparative example) was used as artificial oil stains, and Yingde Chemical's TX530 high-efficiency cleaning solution was used as the cleaning agent. The concentration of the cleaning agent diluted with water was 5wt%.
[0047] (II) Raw Materials
[0048] Paraffinic base oil, grade HVI Ia 500;
[0049] The polymeric synthetic ester has a number average molecular weight of 70,000 Daltons and a kinematic viscosity of 2500 mmHg at 40°C. 2 / s, viscosity index is 170, grade GY-10;
[0050] Chlorinated paraffin, grade T302;
[0051] Sulfurized lard has a kinematic viscosity of 1100 mmHg at 40°C. 2 / s, total sulfur content 11wt%, of which active sulfur content is less than 1wt%, grade SLN111;
[0052] Phosphophosphate, grade T309;
[0053] Chlorinated fatty acid ester, grade E-35;
[0054] 2,6-Di-tert-butyl-4-bis-xanthanyl alkylphenol, wherein the alkyl groups at both ends of the bis-xanthanyl group are n-pentyl;
[0055] The ammonium thiophosphate is a dialkyl dithiophosphate complex ammonium salt, wherein all alkyl groups are n-octyl, the alkylamine used to synthesize the ammonium phosphate is cyclohexylamine, and the alcohol used to synthesize the ammonium phosphate is selected from n-decyl alcohol.
[0056] Phosphate ester amine salt, grade RC3740.
[0057] Example 1
[0058] (1) Prepare the raw materials according to the following weight proportions.
[0059] a) Base oil: 19 parts paraffinic base oil; b) Oiliness agent: 8 parts palm oil, 4 parts high molecular weight synthetic ester; c) Extreme pressure agent: 64.2 parts chlorinated paraffin, 2 parts sulfurized lard and 2 parts thiophosphate; d) Antioxidant: 0.5 parts di-tert-butyl-p-cresol and 0.3 parts dialkyldiphenylamine; see Table 1 for details.
[0060] (2) Preparation method
[0061] First, add a) paraffinic base oil and c) chlorinated paraffin to the reactor. While stirring, raise the temperature to 55°C and maintain this temperature. After mixing evenly, add d) antioxidant and c) sulfurized lard and thiophosphate to the reactor. Finally, add b) oiliness agent component, stir evenly, and cool to room temperature to obtain the final product.
[0062] Example 2
[0063] a) Base oil: 8 parts paraffinic base oil; b) Oiliness agent: 10 parts rapeseed oil, 2 parts high molecular weight synthetic ester; c) Extreme pressure agent: 77.2 parts chlorinated fatty acid ester, 2 parts 2,6-di-tert-butyl-4-bis-xanthan acid alkylphenol and 2 parts ammonium salt of thiophosphate; d) Antioxidant: 0.5 parts di-tert-butylphenol and 0.3 parts styrene diphenylamine; see Table 1 for details.
[0064] (2) Preparation method
[0065] First, add a) paraffinic base oil and c) chlorinated fatty acid esters to the reactor. While stirring, raise the temperature to 55°C and maintain this temperature. After mixing evenly, add the above-mentioned d) antioxidant and c) biflavonic acid alkylphenol and thiophosphate ammonium salt to the reactor. Finally, add b) oiliness agent component, stir evenly, and cool to room temperature to obtain the final product.
[0066] Example 3
[0067] a) Base oil: 23 parts paraffinic base oil; b) Oiliness agent: 12 parts lard, 2 parts high molecular weight synthetic ester; c) Extreme pressure agent: 60 parts chlorinated paraffin, 2 parts sulfurized lard and 2 parts phosphate ester amine salt; d) Antioxidant: 0.5 parts di-tert-butyl-p-cresol and 0.5 parts styrene diphenylamine; see Table 1 for details.
[0068] (2) Preparation method
[0069] First, add a) paraffinic base oil and c) chlorinated paraffin to the reactor. While stirring, raise the temperature to 55°C and maintain this temperature. Then, add d) antioxidant and c) sulfurized lard and phosphate ester amine salt to the reactor. Finally, add b) oiliness agent component, stir evenly, and cool to room temperature to obtain the final product.
[0070] Comparative Example 1
[0071] The difference from Example 1 is that: c) the extreme pressure agent is replaced by a combination of chlorinated paraffin, sulfurized lard, and thiophosphate ester with a combination of chlorinated paraffin and sulfurized isobutylene, as detailed in Table 1.
[0072] Comparative Example 2
[0073] The difference from Example 1 is that: c) the extreme pressure agent is replaced by chlorinated paraffin, sulfurized lard and thiophosphate, as detailed in Table 1.
[0074] Comparative Example 3
[0075] The difference from Example 2 is that: c) the oiliness agent is replaced by isooctyl palmitate instead of rapeseed oil and high molecular weight synthetic ester, as detailed in Table 1.
[0076] Comparative Example 4
[0077] The difference from Example 3 is that: d) the antioxidant is replaced by di-tert-butyl-p-cresol instead of the combination of di-tert-butyl-p-cresol and dialkyldiphenylamine, as detailed in Table 1.
[0078] Table 1
[0079]
[0080]
[0081]
[0082] The products obtained in Examples 1-3 and Comparative Examples 1-4 were subjected to corresponding performance tests, and the results are shown in Table 2.
[0083] Table 2 Test results of the examples and comparative examples
[0084]
[0085] As can be seen from Table 3, Examples 1-3 have higher PB values and longer rotating oxygen bomb times compared to Comparative Examples 1-4, while also having a high cleaning rate and lower odor. In contrast, Comparative Examples 1-4 have the problems of short rotating oxygen bomb time and high odor, Comparative Example 2 has a low PB value, Comparative Example 3 has a low PB value, and Comparative Example 4 has a short rotating oxygen bomb time.
[0086] In summary, the stainless steel pipe rolling oil provided by this invention employs a specific formula to increase the proportion of extreme pressure agents. These extreme pressure agents simultaneously contain chlorine-containing extreme pressure agents, specific sulfur-containing extreme pressure agents, and specific phosphorus-containing extreme pressure agents. Simultaneously, the antioxidants include both phenolic and amine antioxidants. The resulting stainless steel pipe rolling oil exhibits excellent lubrication, particularly a high PB value. It does not use active sulfur extreme pressure agents, has a low odor, and simultaneously possesses good cleaning and antioxidant properties, thus meeting the requirements of stainless steel pipe rolling processes.
[0087] The above description of the embodiments is provided to enable those skilled in the art to understand and apply the present invention. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the embodiments described herein, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention. Adding other functional additives to the preparation components of the present invention to impart corresponding properties to the stainless steel pipe rolling oil is also protected by the present invention.
Claims
1. A stainless steel pipe rolling oil characterized by comprising: Based on parts by weight, it includes the following components: a) 5-30 parts base oil; b) 8-16 parts of oily agent; c) 60-82 parts of extreme pressure agent; d) 0.5 to 1 part antioxidant; The oily agent includes natural oils and synthetic esters, the extreme pressure agent includes chlorine-containing extreme pressure agent, sulfur-containing extreme pressure agent and phosphorus-containing extreme pressure agent, and the antioxidant includes phenolic antioxidants and amine antioxidants.
2. The rolling oil according to claim 1, characterized in that, The composition comprises the following components: a) 8 to 23 parts base oil; and / or, b) 12-14 parts of an oily agent; and / or, c) 64–82 parts of extreme pressure agent; and / or, d) 0.8 to 1 part antioxidant.
3. The rolling oil according to claim 1 or 2, characterized in that, The chlorine-containing extreme pressure agent is selected from at least one of chlorinated paraffin and chlorinated fatty acid esters; and / or, said sulphur containing extreme pressure agent is selected from at least one of sulphurized lard oil, 2,6-di-tert-butyl-4-bisxanthate alkyl phenol; preferably, said sulphurized lard oil has a kinematic viscosity at 40°C of 1000 mm 2 / s ~ 1200 mm 2 / s, a total sulphur content of 10 wt% ~ 12 wt%, wherein the active sulphur content is less than 1 wt%, preferably, said 2,6-di-tert-butyl-4-bisxanthate alkyl phenol has a carbon chain length of the alkyl groups at both ends of the bisxanthate group of C4-C6; and / or, The phosphorus-containing extreme pressure agent is selected from at least one of thiophosphate, ammonium thiophosphate, and amine phosphate; preferably, the thiophosphate is selected from dialkyl dithiophosphate, wherein each alkyl group is independently a C8-C12 straight-chain alkyl group; preferably, the ammonium thiophosphate is selected from dialkyl dithiophosphate ammonium, wherein each alkyl group is independently a C6-C10 straight-chain alkyl group; preferably, the alkylamine and alcohol used to synthesize the ammonium phosphate are each independently selected from cycloalkylamine and C8-C12 straight-chain fatty alcohol.
4. The rolling oil according to any one of claims 1 to 3, characterized in that, The base oil is selected from paraffinic base oils; and / or, The mass ratio of the natural oil to the high-molecular-weight synthetic ester is 1–10:1, preferably 2–6:1; and / or, The mass ratio of the chlorine-containing extreme pressure agent, the sulfur-containing extreme pressure agent, and the phosphorus-containing extreme pressure agent is 58–78:1–3:2, preferably 60–78:1–3:2; and / or, The mass ratio of the phenolic antioxidant to the amine antioxidant is 0.5 to 4:1, preferably 1 to 2:
1.
5. The rolling oil according to any one of claims 1 to 4, characterized in that, The natural oil is selected from at least one of palm oil, lard, rapeseed oil, castor oil, soybean oil, oxidized rapeseed oil, peanut oil, and coconut oil.
6. The rolling oil according to any one of claims 1-5, characterized in that, The number average molecular weight of the high molecular synthetic ester is 50,000 to 100,000 daltons, and the kinematic viscosity at 40°C is 2,300 mm 2 / s to 2,700 mm 2 / s, and the viscosity index is greater than 140, preferably 140 to 200.
7. The rolling oil according to any one of claims 1-6, characterized in that, The phenolic antioxidant is selected from at least one of di-tert-butylphenol, di-tert-butyl-p-cresol, and methylene di-tert-butylphenol.
8. The rolling oil according to any one of claims 1-7, characterized in that, The amine antioxidant is selected from at least one of monoalkyl diphenylamine, dialkyl diphenylamine, and styrene diphenylamine.
9. A method for preparing stainless steel pipe rolling oil according to any one of claims 1-8, characterized in that, The process includes the following steps: mixing base oil and chlorine-containing extreme pressure agent and heating to 50°C to 70°C, adding antioxidant, sulfur-containing extreme pressure agent and phosphorus-containing extreme pressure agent and mixing evenly, then adding oiliness agent and mixing evenly, and optionally cooling to room temperature to obtain rolling oil, preferably the room temperature is 10°C to 30°C.
10. The application of the stainless steel pipe rolling oil according to any one of claims 1 to 8 or the stainless steel pipe rolling oil prepared by the preparation method according to claim 9 in the rolling process of stainless steel pipes, preferably in the cold rolling process of stainless steel pipes.