CN111014326B - Wire drawing powder for steel cord and preparation method thereof - Google Patents
Wire drawing powder for steel cord and preparation method thereof Download PDFInfo
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- CN111014326B CN111014326B CN201911352312.8A CN201911352312A CN111014326B CN 111014326 B CN111014326 B CN 111014326B CN 201911352312 A CN201911352312 A CN 201911352312A CN 111014326 B CN111014326 B CN 111014326B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C9/00—Cooling, heating or lubricating drawing material
- B21C9/02—Selection of compositions therefor
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Abstract
The invention discloses wire drawing powder for a steel cord and a preparation method thereof. The preparation method of the wire drawing powder for the steel cord comprises the following steps: (1) setting the oil temperature and the material temperature, (2) adding sodium hydroxide, sodium silicate, sodium nitrate and water, stirring and mixing, and (3) adding stearic acid, stirring and mixing, and discharging. The wire drawing powder for the steel cord prepared by the invention takes stearic acid as a lubricant, has good lubricating property, can form a layer of lubricating film between a drawn metal wire and the die wall of a wire drawing die, reduces the force energy consumption and the friction between interfaces during drawing, effectively improves the wire drawing speed, and can prevent solid particles from scratching the surface of the steel wire during the wire drawing process, reduce scratches on the surface of the steel wire and improve the surface quality of the steel wire.
Description
Technical Field
The invention relates to the technical field of wire drawing, in particular to wire drawing powder for a steel cord and a preparation method thereof.
Background
The steel cord is a thin steel wire strand or rope which is made of high-quality high-carbon steel, the surface of the steel cord is plated with brass, and the steel cord has special purposes, the using amount of steel wires in a tire is gradually reduced along with the development of the steel cord towards the direction of light weight, so that the improvement of the strength of the steel wires and the surface quality of the steel wires become the most concerned problems of steel cord manufacturers, the domestic wiredrawing powder is difficult to meet the production of the steel cord at present, scratches are easy to appear on the surface of the produced steel wires, and the surface quality of the steel wires is seriously influenced.
Disclosure of Invention
The invention aims to provide drawing powder for a steel cord.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the wire drawing powder for the steel cord comprises, by mass, 50% -80% of stearic acid, 8% -20% of sodium hydroxide, 1% -10% of sodium silicate, 1% -5% of sodium nitrate and 5% -20% of water.
Further, the drawing powder for the steel cord comprises the following preparation steps:
(1) mixing sodium hydroxide, sodium silicate, sodium nitrate and water, and then pouring the mixture into a kneader, setting the oil temperature of heat-conducting oil in the kneader at 220 ℃ and the material temperature at 140 ℃ and stirring and mixing the mixture for 20-40 minutes to obtain a premix;
(2) when the premix reaches a certain temperature, adding stearic acid, and fully stirring and reacting for 2-4 hours to obtain a mixture;
(3) and when the mixture reaches a certain temperature, reducing the oil temperature, continuously stirring for 8-12 hours, closing the heating, cooling and taking out of the pot to obtain the wire drawing powder for the steel cord.
Further, the oil temperature in step (1) is set to 180-220 ℃.
Further, the temperature of the mixture in the step (3) is 100-140 ℃.
Further, the oil temperature in the step (3) is reduced to 110-.
The preparation method of the wire drawing powder for the steel cord has the beneficial effects that:
(1) the prepared wire drawing powder for the steel cord takes stearic acid as a solid lubricant, the stearic acid has good lubricating property, a layer of lubricating film can be formed between a drawn metal wire and the die wall of a wire drawing die, the force energy consumption and the friction between interfaces during drawing are reduced, the wire drawing speed is effectively improved, the wire drawing speed reaches 13m/s, the stearic acid can be firmly adsorbed on the surface of the steel wire and enters the wire drawing die along with the steel wire for extension deformation, the two interfaces in a deformation area are effectively separated, the surface of the steel wire and the die are prevented from being scratched in the wire drawing process, the scratches on the surface of the steel wire are reduced, and the surface quality of the steel wire is improved;
(2) the prepared wire drawing powder for the steel cord contains sodium nitrate, the addition of the sodium nitrate can effectively prevent the wire drawing powder from caking under a high-temperature condition, so that powder does not cake in a die box, the wire drawing powder brought out by a steel wire is uniform powder and does not coke, the probability of blocking a die hole and the loss of the wire drawing powder are reduced, the using amount of the wire drawing powder is saved, and the lubricating effect of the steel wire in the drawing process is ensured;
(3) the preparation process comprises the steps of mixing sodium hydroxide, sodium silicate, sodium nitrate and water, adding stearic acid, wherein the stearic acid and the sodium hydroxide can generate hydrolysis reaction, so that the problems of overhigh temperature, excessively violent reaction degree and nonuniform reaction caused by overhigh reaction speed in the reaction of the stearic acid and the sodium hydroxide can be solved by adopting the feeding mode, the conversion rate of reactants can be improved, various performances of the wire drawing powder can be effectively improved, the wire drawing powder can meet the drawing requirements of high-strength steel wires 82B and 90# steel, and the compression rate reaches 90%.
Detailed Description
A drawing powder for a steel cord comprising the steps of:
according to the mass percentage, 50-80% of stearic acid, 8-20% of sodium hydroxide, 1-10% of sodium silicate, 1-5% of sodium nitrate and 5-20% of water are provided; mixing sodium hydroxide, sodium silicate, sodium nitrate and water, pouring the mixture into a kneader, setting the oil temperature at 180 ℃ and the material temperature at 100 ℃ and the material temperature at 140 ℃, and stirring and mixing for 20-40 minutes to obtain a premix; adding stearic acid when the temperature of the premix reaches 80-120 ℃, and fully stirring and reacting for 2-4 hours to obtain a mixture; when the temperature of the mixture reaches 100-140 ℃, the oil temperature is reduced to 110-130 ℃, the mixture is continuously stirred for 8-12 hours, the heating is closed, and the mixture is cooled and taken out of the pot, so that the wire drawing powder for the steel cord is obtained.
Example 1
The preparation method of the drawing powder for the steel cord of the embodiment comprises the following steps:
according to the mass percentage, 50% of stearic acid, 20% of sodium hydroxide, 9% of sodium silicate, 1% of sodium nitrate and 20% of water are provided; mixing sodium hydroxide, sodium silicate, sodium nitrate and water, pouring the mixture into a kneader, setting the oil temperature to be 180 ℃, setting the material temperature to be 100 ℃, and stirring and mixing for 20 minutes to obtain a premix; when the temperature of the premix reaches 80 ℃, adding stearic acid, and fully stirring and reacting for 2 hours to obtain a mixture; and when the temperature of the mixture reaches 100 ℃, reducing the oil temperature to 110 ℃, continuously stirring for 8 hours, closing the heating, cooling and taking out of the pot to obtain the wire drawing powder for the steel cord.
Example 2
The preparation method of the drawing powder for the steel cord of the embodiment comprises the following steps:
according to the mass percentage, 80% of stearic acid, 8% of sodium hydroxide, 5% of sodium silicate, 2% of sodium nitrate and 5% of water are provided; mixing sodium hydroxide, sodium silicate, sodium nitrate and water, pouring the mixture into a kneader, setting the oil temperature to be 190 ℃ and the material temperature to be 110 ℃, and stirring and mixing the mixture for 30 minutes to obtain a premix; when the temperature of the premix reaches 90 ℃, adding stearic acid, and fully stirring and reacting for 2 hours to obtain a mixture; and when the temperature of the mixture reaches 110 ℃, reducing the oil temperature to 110 ℃, continuously stirring for 8 hours, closing the heating, cooling and taking out of the pot to obtain the wire drawing powder for the steel cord.
Example 3
The preparation method of the drawing powder for the steel cord of the embodiment comprises the following steps:
according to the mass percentage, 70% of stearic acid, 17% of sodium hydroxide, 5% of sodium silicate, 3% of sodium nitrate and 5% of water are provided; mixing sodium hydroxide, sodium silicate, sodium nitrate and water, then pouring the mixture into a kneader, setting the oil temperature to be 200 ℃ and the material temperature to be 110 ℃, and stirring and mixing the mixture for 30 minutes to obtain a premix; when the temperature of the premix reaches 90 ℃, adding stearic acid, and fully stirring and reacting for 3 hours to obtain a mixture; and when the temperature of the mixture reaches 110 ℃, reducing the oil temperature to 120 ℃, continuously stirring for 12 hours, closing the heating, cooling and taking out of the pot to obtain the wire drawing powder for the steel cord.
Example 4
The preparation method of the drawing powder for the steel cord of the embodiment comprises the following steps:
according to the mass percentage, 69% of stearic acid, 15% of sodium hydroxide, 1% of sodium silicate, 5% of sodium nitrate and 10% of water are provided; mixing sodium hydroxide, sodium silicate, sodium nitrate and water, then pouring the mixture into a kneader, setting the oil temperature to be 200 ℃, the material temperature to be 120 ℃, and stirring and mixing the mixture for 30 minutes to obtain a premix; when the temperature of the premix reaches 100 ℃, adding stearic acid, and fully stirring and reacting for 3 hours to obtain a mixture; and when the temperature of the mixture reaches 120 ℃, reducing the oil temperature to 120 ℃, continuously stirring for 10 hours, closing the heating, cooling and taking out of the pot to obtain the wire drawing powder for the steel cord.
Comparative example: providing 40% of stearic acid, 5% of sodium hydroxide, 0.5% of sodium silicate, 0.5% of sodium nitrate and 54% of water in percentage by mass; mixing sodium hydroxide, sodium silicate, sodium nitrate and water, pouring the mixture into a kneader, setting the oil temperature to be 160 ℃, the material temperature to be 120 ℃, and stirring and mixing for 30 minutes to obtain a premix; when the temperature of the premix reaches 100 ℃, adding stearic acid, and fully stirring and reacting for 3 hours to obtain a mixture; and when the temperature of the mixture reaches 120 ℃, reducing the oil temperature to 100 ℃, continuously stirring for 8 hours, closing the heating, cooling and taking out of the pot to obtain the wire drawing powder for the steel cord.
Examples of the experiments
The drawing powders for steel cord prepared in examples 1 to 4 and comparative example were respectively subjected to performance tests, and the drawing speed of the drawing powder for steel cord and the damage rate of the surface of the steel wire after drawing were mainly examined.
And (3) testing: a wire drawing test is carried out by adopting a wire drawing machine, and the wire drawing powder prepared in the examples and the comparative examples are respectively used as a lubricant to detect the drawing speed of the wire drawing powder and the damage rate of the surface of the steel wire after drawing.
TABLE 1 Performance data of the drawing powders for steel cords prepared in the examples and of the comparative examples
| Item | Drawing speed (m/s) | Surface damage ratio of Steel wire (%) |
| Example 1 | 10 | 0.3 |
| Example 2 | 7 | 0.4 |
| Example 3 | 13 | 0.3 |
| Example 4 | 8 | 5 |
| Comparative example | 6 | 10 |
As can be seen from table 1, in examples 1 to 4, the wiredrawing powder for steel cords prepared by the present invention is prepared by mixing sodium hydroxide, sodium nitrate, sodium silicate and water, and then adding stearic acid, wherein stearic acid is used as a main component, and has good lubricating property, so that a layer of lubricating film can be formed between a metal wire to be drawn and a die wall of a wiredrawing die, thereby reducing the force energy consumption and the friction between interfaces during drawing, effectively increasing the wiredrawing speed to enable the wiredrawing speed to reach 13m/s, and stearic acid can be firmly adsorbed on the surface of the steel wire and enter the wiredrawing die along with the steel wire for extension deformation, effectively separating two interfaces of a deformation zone, preventing the surface of the steel wire from rubbing against the die during wiredrawing, reducing scratches on the surface of the steel wire, and effectively preventing the wiredrawing powder from caking under high temperature conditions due to the addition of sodium nitrate, the powder is not agglomerated in the die box, and in the drawing process, the wire drawing powder brought out by the steel wire is uniform powder and is not coked, so that the probability of blocking a die hole and the loss of the wire drawing powder are reduced, the using amount of the wire drawing powder is saved, the lubricating effect of the steel wire in the drawing process is ensured, and the surface quality of the steel wire is improved.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (4)
1. The drawing powder for the steel cord is characterized by comprising, by mass, 50% -80% of stearic acid, 8% -20% of sodium hydroxide, 1% -10% of sodium silicate, 1% -5% of sodium nitrate and 5% -20% of water, and the preparation method of the drawing powder for the steel cord comprises the following steps:
(1) mixing sodium hydroxide, sodium silicate, sodium nitrate and water, and then pouring the mixture into a kneader, setting the oil temperature of heat-conducting oil in the kneader at 220 ℃ and the material temperature at 140 ℃ and stirring and mixing the mixture for 20-40 minutes to obtain a premix;
(2) when the premix reaches a certain temperature, adding stearic acid, and fully stirring and reacting for 2-4 hours to obtain a mixture;
(3) and when the mixture reaches a certain temperature, reducing the oil temperature, continuously stirring for 8-12 hours, closing the heating, cooling and taking out of the pot to obtain the wire drawing powder for the steel cord.
2. A drawing powder for a steel cord according to claim 1, wherein the temperature of the pre-mixture of the step (2) is 80-120 ℃.
3. A wiredrawing powder for steel cord as claimed in claim 1, characterized in that the temperature of said mixture in step (3) is 100-140 ℃.
4. A wiredrawing powder for steel cord as claimed in claim 1, characterized in that said oil temperature in step (3) is decreased to 110-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911352312.8A CN111014326B (en) | 2019-12-25 | 2019-12-25 | Wire drawing powder for steel cord and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911352312.8A CN111014326B (en) | 2019-12-25 | 2019-12-25 | Wire drawing powder for steel cord and preparation method thereof |
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| Publication Number | Publication Date |
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| CN111014326A CN111014326A (en) | 2020-04-17 |
| CN111014326B true CN111014326B (en) | 2021-06-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3794595A (en) * | 1972-05-08 | 1974-02-26 | Universal Oil Prod Co | Working of non-ferrous metals |
| DE19834853A1 (en) * | 1998-08-01 | 2000-02-03 | August Neuhoff Fa | Backing material and its use as well as cold-forming processes |
| TWI457433B (en) * | 2008-01-30 | 2014-10-21 | Chemetall Gmbh | Process for coating metallic surfaces with a phosphate layer and then with a polymer lubricant layer |
| CN102311851B (en) * | 2011-08-12 | 2013-06-12 | 天津市金海利油脂有限公司 | Wire drawing lubricant for automatic steel and preparation method thereof |
| CN107185984B (en) * | 2017-05-18 | 2020-04-17 | 当涂县宏宇金属炉料有限责任公司 | Wire drawing powder with good lubricating effect |
| CN109576046A (en) * | 2018-12-29 | 2019-04-05 | 南京派诺金属表面处理技术有限公司 | Dedicated drawing powder of spring steel wire and preparation method thereof |
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Effective date of registration: 20220815 Address after: 443000 group 7, Yangxi village, Zhicheng Town, Yidu City, Yichang City, Hubei Province Patentee after: Pino (Hubei) green chemical Intelligent Manufacturing Co.,Ltd. Address before: Floor 4-5, Incubation Building, No. 12, Jiangsu Membrane Technology Industrial Park, No. 1, Industrial Technology Research and Innovation Park, Jiangbei New District, Nanjing City, Jiangsu Province, 210000 Patentee before: NANJING PAINUO METAL SURFACE TREATMENT TECHNOLOGY CO.,LTD. |
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