CN110982606A - Wire drawing powder for PC prestressed steel wire and preparation method thereof - Google Patents
Wire drawing powder for PC prestressed steel wire and preparation method thereof Download PDFInfo
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- CN110982606A CN110982606A CN201911352316.6A CN201911352316A CN110982606A CN 110982606 A CN110982606 A CN 110982606A CN 201911352316 A CN201911352316 A CN 201911352316A CN 110982606 A CN110982606 A CN 110982606A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/08—Inorganic acids or salts thereof
- C10M2201/082—Inorganic acids or salts thereof containing nitrogen
- C10M2201/083—Inorganic acids or salts thereof containing nitrogen nitrites
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/087—Boron oxides, acids or salts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
- C10M2207/122—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic
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Abstract
The invention discloses wire drawing powder for PC prestressed steel wires and a preparation method thereof. The preparation method of the wire drawing powder for the PC prestressed steel wire comprises the following steps: (1) stirring sodium hydroxide, borax and water into premix, (2) adding stearic acid, stirring into mixture, and (3) adding sodium nitrite and graphite, stirring, mixing and discharging. The drawing powder for PC prestressed steel wires prepared by the invention takes stearic acid as a main body and borax as a solid lubricant, has good lubricating property, can form a layer of lubricating film between a drawn metal wire and the die wall of a drawing die, reduces the friction between interfaces, reduces the force energy consumption during drawing, and prevents the drawing powder for PC prestressed steel wires from being bonded on the die wall due to heating in the drawing process.
Description
Technical Field
The invention relates to the technical field of wire drawing, in particular to wire drawing powder for PC prestressed steel wires and a preparation method thereof.
Background
The PC prestressed steel wire adopts a high-strength 82B wire rod as a raw material, the wire rod is generally drawn from 12.5mm to 5.05mm, the compression rate is 83.7%, the steel wire has high strength and large diameter, the time for replacing a die in the drawing process is long, the consumption of the die is reduced while the drawing speed is improved in order to improve the production efficiency, the drawing speed of most drawing powder on the market is only 5m/s at present, the die consumption is 0.1 per ton, and the phenomena of drawing powder coking and die hole blockage easily occur in the process of drawing the prestressed steel wire.
Disclosure of Invention
The invention aims to provide drawing powder for PC prestressed steel wires.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the drawing powder for PC prestressed steel wire includes stearic acid 50-70 wt%, sodium hydroxide 8-20 wt%, sodium nitrite 1-10 wt%, graphite 1-5 wt%, borax 5-20 wt% and water 5-20 wt%.
Further, the average particle size of the graphite is 0.5 to 0.8 mm.
Further, the average particle size of the borax is 0.45-0.85 mm.
Further, the drawing powder for the PC prestressed steel wire comprises the following preparation steps:
(1) mixing sodium hydroxide, borax and water, pouring the mixture into a kneader, setting the oil temperature, and fully stirring for 20-40 minutes to obtain a premix;
(2) when the temperature of the premix reaches a certain temperature, adding stearic acid into the premix, and fully stirring and reacting for 0.5-1.5 hours to obtain a mixture;
(3) and when the material temperature of the mixture reaches a certain temperature, adding sodium nitrite and graphite into the mixture, fully stirring for 6-7 hours, closing the kneading machine, and cooling and taking out of the pot to obtain the drawing powder for the PC prestressed steel wire.
Further, the oil temperature in step (1) is set to 160-240 ℃.
Further, the temperature of the premix in the step (2) is 60-100 ℃.
Further, the material temperature of the mixture in the step (3) is 100-140 ℃.
The preparation method of the wire drawing powder for the PC prestressed steel wire has the beneficial effects that:
(1) the drawing powder for PC prestressed steel wires prepared by the invention takes stearic acid as a main raw material, and borax is added as a solid lubricant, the stearic acid and the borax have good lubricating property, a layer of lubricating film can be formed between a drawn metal wire and a die wall of a drawing die, the friction between interfaces is reduced, the force energy consumption during drawing is reduced, the adhesion on the metal die wall due to heating is prevented, the energy consumption and the temperature rise during drawing can be reduced, the service life of the drawing die is prolonged, the surface quality of a product is ensured, and the deformation is uniform;
(2) graphite and sodium nitrite are added into the wire drawing powder for PC prestressed steel wires, the graphite is of a layered structure and has good lubricating property and high temperature resistance, during wire drawing, the graphite is of a layered structure, the bonding force of molecules in each layer is strong, and the bonding force of molecules between each layer is weak, so that the graphite can be firmly adsorbed on the surface of the steel wire and enters a wire drawing die along with the steel wire for extension deformation, two interfaces of a deformation area are effectively separated, the friction between the surface of the steel wire and the die in the wire drawing process is prevented, the energy consumption and the temperature rise in the drawing process are reduced, the service life of the wire drawing die is prolonged, the antirust property of the drawn steel wire can be effectively improved by adding the sodium nitrite, and the quality of the steel wire is;
(3) according to the wire drawing powder for the PC prestressed steel wire, 80% of powder particles have the average particle size of 20-40 meshes, so that dust is greatly reduced, the powder does not cake in a die box, the wire drawing powder brought out by the steel wire is uniform powder and is not coked in the drawing process, 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;
(4) the preparation process comprises the steps of mixing sodium hydroxide, borax and water, adding stearic acid, wherein the adding mode can avoid the problems of overhigh temperature, excessively violent reaction degree and excessively high reaction speed during the reaction of stearic acid and sodium hydroxide, so that the reaction is not uniform, and finally adding sodium nitrite to ensure that sodium hydroxide and stearic acid are completely reacted, so that nitrogen dioxide generated by the reaction of sodium nitrite and stearic acid is avoided, toxic gas is generated, graphite does not participate in the reaction, and the preparation process is mainly used for improving the lubricating property and the high temperature resistance of the drawing powder.
Detailed Description
The drawing powder for the PC prestressed steel wire comprises the following steps:
according to the mass percentage, 50 to 70 percent of stearic acid, 8 to 20 percent of sodium hydroxide, 1 to 10 percent of sodium nitrite, 1 to 5 percent of graphite with the average grain diameter of 0.5 to 0.8mm, 5 to 20 percent of borax with the average grain diameter of 0.45 to 0.85mm and 5 to 20 percent of water are provided. Mixing sodium hydroxide, borax and water, pouring the mixture into a kneader, setting the oil temperature to be 160-240 ℃, fully stirring for 20-40 minutes to obtain a premix, adding stearic acid when the material temperature of the premix reaches 60-100 ℃, fully stirring for reaction for 0.5-1.5 hours to obtain a mixture, adding sodium nitrite and graphite when the material temperature of the mixture reaches 100-140 ℃, fully stirring for 6-7 hours, closing the kneader, and cooling and taking out the mixture from the kneader to obtain the drawing powder for PC prestressed steel wires.
Example 1
The preparation method of the drawing powder for the PC prestressed steel wire comprises the following steps:
according to the mass percentage of the raw materials, 50% of stearic acid, 8% of sodium hydroxide, 10% of sodium nitrite, 1% of graphite with the average particle size of 0.5mm, 17% of borax with the average particle size of 0.45mm and 14% of water are provided, the sodium hydroxide, the borax and the water are mixed and then poured into a kneader, the oil temperature is set to be 160 ℃, the stirring is carried out for 20 minutes, so as to obtain a premix, when the material temperature of the premix reaches 60 ℃, the stearic acid is added, the stirring is carried out for 0.5 hour, so as to obtain a mixture, when the material temperature of the mixture reaches 100 ℃, the sodium nitrite and the graphite are added, the stirring is carried out for 6 hours, the kneader is closed, and the mixture is cooled and taken out of a pot, so as to obtain the drawing.
Example 2
The preparation method of the drawing powder for the PC prestressed steel wire comprises the following steps:
according to the mass percentage of the raw materials, 70% of stearic acid, 15% of sodium hydroxide, 1% of sodium nitrite, 1% of graphite with the average particle size of 0.55mm, 8% of borax with the average particle size of 0.5mm and 5% of water are provided, the sodium hydroxide, the borax and the water are mixed and then poured into a kneader, the oil temperature is set to be 170 ℃, the stirring is carried out for 25 minutes, so as to obtain a premix, when the material temperature of the premix reaches 70 ℃, the stearic acid is added, the stirring is carried out for 1 hour fully, so as to obtain a mixture, when the material temperature of the mixture reaches 110 ℃, the sodium nitrite and the graphite are added, the stirring is carried out for 6 hours fully, the kneader is closed, and the mixture is cooled and taken out of a pot, so as to obtain.
Example 3
The preparation method of the drawing powder for the PC prestressed steel wire comprises the following steps:
according to the mass percentage of the raw materials, 60% of stearic acid, 20% of sodium hydroxide, 2% of sodium nitrite, 5% of graphite with the average particle size of 0.6mm, 5% of borax with the average particle size of 0.55mm and 8% of water are provided, the sodium hydroxide, the borax and the water are mixed and then poured into a kneader, the oil temperature is set to be 180 ℃, the stirring is carried out for 30 minutes, so as to obtain a premix, when the material temperature of the premix reaches 80 ℃, the stearic acid is added, the stirring is carried out for 6.5 hours, so as to obtain a mixture, when the material temperature of the mixture reaches 130 ℃, the sodium nitrite and the graphite are added, the stirring is carried out for 7 hours, the kneader is closed, and the mixture is cooled and taken out of a pot, so as to obtain the drawing.
Example 4
The preparation method of the drawing powder for the PC prestressed steel wire comprises the following steps:
according to the mass percentage of the raw materials, 55% of stearic acid, 10% of sodium hydroxide, 5% of sodium nitrite, 2% of graphite with the average particle size of 0.65mm, 20% of borax with the average particle size of 0.6mm and 8% of water are provided, the sodium hydroxide, the borax and the water are mixed and then poured into a kneader, the oil temperature is set to be 190 ℃, the stirring is carried out for 30 minutes, so as to obtain a premix, when the material temperature of the premix reaches 90 ℃, stearic acid is added, the stirring is carried out for 1.5 hours, so as to obtain a mixture, when the material temperature of the mixture reaches 140 ℃, the sodium nitrite and the graphite are added, the stirring is carried out for 7 hours, the kneader is closed, and the mixture is cooled and taken out of a pot, so as to obtain the drawing powder.
Example 5
The preparation method of the drawing powder for the PC prestressed steel wire comprises the following steps:
according to the mass percentage of the raw materials, 65% of stearic acid, 10% of sodium hydroxide, 3% of sodium nitrite, 2% of graphite with the average particle size of 0.7mm, 12% of borax with the average particle size of 0.65mm and 8% of water are provided, the sodium hydroxide, the borax and the water are mixed and then poured into a kneader, the oil temperature is set to be 200 ℃, the stirring is carried out for 30 minutes, so as to obtain a premix, when the material temperature of the premix reaches 80 ℃, stearic acid is added, the stirring is carried out for 1 hour fully, so as to obtain a mixture, when the material temperature of the mixture reaches 120 ℃, the sodium nitrite and the graphite are added, the stirring is carried out for 7 hours fully, the kneader is closed, and the mixture is cooled and taken out of a pot, so as to obtain the.
Comparative example: according to the mass percentage of the raw materials, 40% of stearic acid, 6.5% of sodium hydroxide, 0.5% of sodium nitrite, 0.5% of graphite with the average particle size of 0.7mm, 4.5% of borax with the average particle size of 0.65mm and 48% of water are provided, the sodium hydroxide, the borax and the water are mixed and then poured into a kneader, the oil temperature is set to be 200 ℃, stirring is carried out for 30 minutes to obtain a premix, when the material temperature of the premix reaches 80 ℃, stearic acid is added, the mixture is obtained by fully stirring for 1 hour, when the material temperature of the mixture reaches 120 ℃, the sodium nitrite and the graphite are added, the mixture is fully stirred for 7 hours, the kneader is closed, and the mixture is cooled and taken out of a pot.
Examples of the experiments
The drawing powders for PC prestressed steel wires prepared in examples 1 to 5 and comparative example are respectively subjected to performance tests, and the high temperature resistance, the drawing performance and the drawing speed of the drawing powders for PC prestressed steel wires are mainly considered.
And (3) testing: and (3) carrying out a wire drawing test by adopting a wire drawing machine, and respectively taking the wire drawing powder prepared in the examples and the comparative examples as a lubricant to detect the high temperature resistance, the wire drawing performance and the wire drawing speed of the wire drawing powder.
Table 1 performance data of drawing powder for PC prestressed wire prepared in example and comparative example
| Item | High temperature resistance (. degree. C.) | Steel wire diameter (mm) | Drawing speed (m/s) |
| Example 1 | 280 | 5.05 | 6 |
| Example 2 | 285 | 1.3 | 7 |
| Example 3 | 290 | 1.3 | 6 |
| Example 4 | 290 | 1.3 | 6.5 |
| Example 5 | 300 | 1.3 | 7 |
| Comparative example | 260 | 5.05 | 5 |
As can be seen from table 1, in examples 1 to 5, the wire drawing powder for PC prestressed steel wires prepared by the present invention is prepared by mixing sodium hydroxide, borax and water, adding stearic acid, and finally adding sodium nitrite and graphite, and has good lubricating property because stearic acid is used as a main body and borax is added as a solid lubricant, a layer of lubricating film can be formed between the drawn metal wire and the die wall of the wire drawing die, friction between interfaces is reduced, energy consumption during drawing is reduced, and adhesion of the wire drawing powder for PC prestressed steel wires on the die wall due to heat generation during the wire drawing process is prevented, so that the wire drawing powder for PC prestressed steel wires has good high temperature resistance and wire drawing property, and has good drawing speed during actual production.
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 (7)
1. The drawing powder for PC prestressed steel wires is characterized by comprising, by mass, 50% -70% of stearic acid, 8% -20% of sodium hydroxide, 1% -10% of sodium nitrite, 1% -5% of graphite, 5% -20% of borax and 5% -20% of water.
2. The drawing powder for PC prestressed steel wires as claimed in claim 1, wherein the average particle size of the graphite is 0.5-0.8 mm.
3. The drawing powder for PC prestressed steel wires as claimed in claim 1, wherein the borax has an average particle size of 0.45-0.85 mm.
4. The drawing powder for PC prestressed steel wires as claimed in claim 1, is characterized by comprising the following preparation steps:
(1) mixing sodium hydroxide, borax and water, pouring the mixture into a kneader, setting the oil temperature, and fully stirring for 20-40 minutes to obtain a premix;
(2) when the temperature of the premix reaches a certain temperature, adding stearic acid into the premix, and fully stirring and reacting for 0.5-1.5 hours to obtain a mixture;
(3) and when the material temperature of the mixture reaches a certain temperature, adding sodium nitrite and graphite into the mixture, fully stirring for 6-7 hours, closing the kneading machine, and cooling and taking out of the pot to obtain the drawing powder for the PC prestressed steel wire.
5. The wire drawing powder for PC prestressed steel wires as claimed in claim 4, wherein the oil temperature in step (1) is set to 160-240 ℃.
6. The wire drawing powder for PC prestressed steel wires as claimed in claim 4, wherein the temperature of the premix in step (2) is 60-100 ℃.
7. The wire drawing powder for PC prestressed steel wires as claimed in claim 4, wherein the material temperature of the mixture in step (3) is 100-140 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911352316.6A CN110982606A (en) | 2019-12-25 | 2019-12-25 | Wire drawing powder for PC prestressed steel wire and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911352316.6A CN110982606A (en) | 2019-12-25 | 2019-12-25 | Wire drawing powder for PC prestressed steel wire and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111748397A (en) * | 2020-05-29 | 2020-10-09 | 贵州水钢同鑫晟金属制品有限公司 | Wire drawing powder for metal wire and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103897787A (en) * | 2014-03-11 | 2014-07-02 | 广州市奥赛钢线科技有限公司 | Lubricant for drawing spring steel wire |
| CN106883913A (en) * | 2017-02-07 | 2017-06-23 | 河北纳泰化工有限公司 | A kind of nano modification metal wire-drawing powder and preparation method thereof |
| CN108003975A (en) * | 2017-12-11 | 2018-05-08 | 当涂县宏宇金属炉料有限责任公司 | A kind of metal wire rod wire drawing powder |
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2019
- 2019-12-25 CN CN201911352316.6A patent/CN110982606A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103897787A (en) * | 2014-03-11 | 2014-07-02 | 广州市奥赛钢线科技有限公司 | Lubricant for drawing spring steel wire |
| CN106883913A (en) * | 2017-02-07 | 2017-06-23 | 河北纳泰化工有限公司 | A kind of nano modification metal wire-drawing powder and preparation method thereof |
| CN108003975A (en) * | 2017-12-11 | 2018-05-08 | 当涂县宏宇金属炉料有限责任公司 | A kind of metal wire rod wire drawing powder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111748397A (en) * | 2020-05-29 | 2020-10-09 | 贵州水钢同鑫晟金属制品有限公司 | Wire drawing powder for metal wire and preparation method thereof |
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Application publication date: 20200410 |