CN114686899A - All-weather low-rolling-resistance high-strength bead wire for semi-steel radial tire and production process thereof - Google Patents
All-weather low-rolling-resistance high-strength bead wire for semi-steel radial tire and production process thereof Download PDFInfo
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- CN114686899A CN114686899A CN202210378593.XA CN202210378593A CN114686899A CN 114686899 A CN114686899 A CN 114686899A CN 202210378593 A CN202210378593 A CN 202210378593A CN 114686899 A CN114686899 A CN 114686899A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D145/00—Coating compositions based on homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic system; Coating compositions based on derivatives of such polymers
- C09D145/02—Coumarone-indene polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D157/00—Coating compositions based on unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D157/02—Copolymers of mineral oil hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
- C23C18/1824—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment
- C23C18/1837—Multistep pretreatment
- C23C18/1844—Multistep pretreatment with use of organic or inorganic compounds other than metals, first
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/38—Coating with copper
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/021—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by dipping
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses a high-strength tire bead steel wire for an all-weather low-rolling-resistance semisteel radial tire and a production process thereof, wherein the production process comprises the following steps: s1, paying off; s2, degreasing; degreasing by using hot water, degreasing by using a surface active composition, and degreasing by using hot water; s3, tempering; tempering the degreased steel wire in a medium-frequency induction furnace; s4, water cooling; s5, acid washing and alkali washing; orderly passing the steel wire cooled to room temperature through a first pickling tank, an alkali washing tank, a second pickling tank and a water washing tank; s6, chemical plating; s7, coating a resin composition; s8, taking up the wires to obtain the high-strength tire bead steel wire for the semi-steel radial tire. The tire bead steel wire prepared by the invention has high strength and strong adhesive force with rubber.
Description
Technical Field
The invention relates to the technical field of tire bead steel wires, in particular to a high-strength tire bead steel wire for an all-weather low-rolling-resistance semi-steel radial tire and a production process thereof.
Background
The semi-steel radial tire adopts rayon or other fibers as a carcass, uses steel cords as a belt ply, and is generally used for cars or light trucks, such as buses and the like.
The semi-steel wire radial tire has the following advantages:
(1) the service life is long. Because the belt layer with high rigidity is arranged between the radial tire tread and the carcass ply, when the tire rolls on a road surface, the circumferential deformation is small, and the relative slip is small. The radial elasticity of the tire body is large, so that the ground contact area of the tire is increased, the pressure intensity is reduced, the tire tread has strong wear resistance, puncture resistance and difficult tire burst, and the driving mileage is 30 percent more than that of a common oblique line tire;
(2) low rolling resistance and low oil consumption. Because the radial ply of the tire cord is few, the running temperature is low, the heat dissipation is fast, and because the circumferential deformation is small, the rolling resistance is smaller than that of the common oblique line tire by 15 percent to 20 percent, and the sliding distance is about 25 percent more, therefore, the running speed of the automobile can be improved by using the radial ply tire, and the fuel economy of the automobile can also be improved (the fuel consumption can be reduced by 5 percent to 12 percent generally);
(3) the bearing capacity is large. The radial tire cord is arranged in the same direction as the main deformation direction of the tire, so that the strength of the cord is fully and effectively utilized, and the bearing capacity of the radial tire cord is more than 10 percent higher than that of a common oblique tire. For example, the bearing capacity of a domestic 9000-20 radial tire with only one layer of steel wire cord is 1800KG, while the bearing capacity of a diagonal tire with 10 layers of cotton cord fabrics of the same type is only 1500 KG;
(4) the shock absorption performance is good. The radial elasticity of the radial tire body is large, the radial deformation (vertical to the ground direction) is large, the impact of uneven road surfaces can be relieved, the smoothness of the automobile is improved, the riding comfort is realized, the possibility that the automobile is damaged by the impact is reduced, and the service life of the automobile is prolonged.
However, the existing bead wire for the semi-steel radial tire has the defects of low strength, poor adhesive property and the like, so that the high-strength bead wire for the all-weather low-rolling-resistance semi-steel radial tire and the production process thereof are required to be provided.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a high-strength tire bead steel wire for an all-weather low-rolling-resistance semi-steel radial tire and a production process thereof.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
the production process of the high-strength bead wire for the all-weather low-rolling-resistance semi-steel radial tire comprises the following steps:
s1, paying off
The base steel wire with the diameter of 0.96mm is placed on a production line, and the paying-off speed is as follows: 100-120 m/mim;
s2, degreasing
Degreasing by using hot water, degreasing by using a surface active composition, and degreasing by using hot water;
s3, tempering
Tempering the degreased steel wire in a medium-frequency induction furnace;
s4, water cooling
Cooling the tempered steel wire to room temperature by using cold water;
s5, acid washing and alkali washing
Orderly passing the steel wire cooled to room temperature through a first pickling tank, an alkali washing tank, a second pickling tank and a water washing tank;
s6. chemical plating
Carrying out chemical plating treatment on the steel wire by using mixed copper liquid;
s7. resin coating composition
Coating the steel wire subjected to the chemical plating treatment with a resin composition;
s8, take-up
After coating the resin composition, taking up the wire to obtain the high-strength bead wire for the semi-steel radial tire.
Preferably, in step S2, the surfactant composition includes the following raw materials in parts by weight: 100-120 parts of water, 10-20 parts of sodium dodecyl benzene sulfonate and 10-20 parts of triethanolamine oleate; the surface active composition has excellent wetting, emulsifying, washing and degreasing effects, and has good removing capability on special oil stains (such as lubricating oil and the like) on drawn steel wires.
Preferably, in the step S2, the temperature of the hot water is 75-80 ℃;
preferably, in the step S3, the tempering temperature is 430-440 ℃, and the time is 10-12S;
preferably, in step S5, the first pickling tank includes: sulfuric acid solution with concentration of 40-50g/L and current density of 2-3A/cm2Washing time is 3-5 s;
preferably, in step S5, the second pickling tank includes: hydrochloric acid solution with concentration of 10-20g/L, temperature of 60-70 ℃, washing time of 10-15 s;
preferably, in step S5, the alkaline washing tank: sodium hydroxide solution with concentration of 90-100g/L and current density of 2-3A/cm2Washing time is 50-60 s; in the invention, the first pickling solution is 40-50g/L sulfuric acid solution, the pickling time is 3-5s, and the steel wire is treated in the first pickling solutionRemoving oil stains, oxides and rust on the surface of the metal; and then the steel wire is washed by 90-100g/L sodium hydroxide solution and hot hydrochloric acid solution, so that oxides and oil stains on the surface of the steel wire can be sufficiently removed, and the subsequent electroless copper plating is convenient to carry out. In addition, compared with the traditional long-time pickling process, the first pickling tank is low in concentration of pickling solution, the pickling time is short, the subsequent alkali washing and hot pickling are combined, the pickling corrosion time is greatly shortened, the pickling solution does not corrode a steel wire substrate, and the mechanical property of the steel wire is not affected.
Preferably, in the step S6, the mixed copper solution includes SnSO with a concentration of 1-3g/L4And 35-50g/LCuSO4The quality of the plating layer is required to be 0.21-0.30 g/Kg.
Preferably, the resin composition comprises the following raw materials in parts by weight: 90-100 parts of gasoline, 30-40 parts of acetone, 10-20 parts of coumar resin, 10-20 parts of dicyclopentadiene resin and 10-20 parts of coumarone-indene resin; according to the invention, by coating the resin composition, the defects that the linearity of the tire bead steel wire is poor, the bending strength ratio of the steel wire is low, the surface quality of the finished steel wire is damaged, the adhesion force and the surface color of the steel wire are influenced and the like in the production process are avoided, the adhesion force of a coating is improved to a certain extent, the adhesion of the resin composition is convenient, and the resin composition has a certain antirust effect.
The bead wire is a wire with the diameter of 0.96mm, the breaking force of the bead wire is more than 1500N, and the tensile strength of the bead wire is more than 2200 MPa.
(III) advantageous effects
Compared with the prior art, the invention provides the high-strength bead wire for the all-weather low-rolling-resistance semi-steel radial tire and the production process thereof, and the high-strength bead wire has the following beneficial effects:
the invention uses the base material steel wire with the diameter of 1mm to prepare the bead steel wire through paying off, degreasing, tempering, water cooling, acid washing, alkali washing, copper plating, resin composition coating and wire winding, and the bead steel wire has the tensile strength of more than 2200MPa, high tensile strength and very high breaking force of more than 1500N, and can be applied to the preparation of semi-steel radial tires.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
S1, paying off
A0.96 mm steel wire (model C70DA) is taken as a basic steel wire and placed on a production line, and the paying-off speed is as follows: 100 m/mim;
s2. degreasing
Degreasing and washing the steel wire by using hot water (75 ℃), degreasing and washing the steel wire by using the surface active composition, and degreasing and washing the steel wire by using the hot water (75 ℃);
s3, tempering
Tempering the degreased steel wire in a medium-frequency induction furnace; tempering temperature is 430 ℃ and time is 10 s;
s4, water cooling
Cooling the tempered steel wire to room temperature by using cold water;
s5, acid washing and alkali washing
Orderly passing the steel wire cooled to room temperature through a first pickling tank (electrolytic washing), an alkaline washing tank (electrolytic washing), a second pickling tank and a water washing tank;
wherein, the first pickling tank comprises pickling solution: the concentration of the sulfuric acid solution is 40g/L, and the current density is 2A/cm2Washing time 3 s; in step S5, an alkaline washing tank: 90g/L sodium hydroxide solution with current density of 2A/cm2Washing time 50 s; in the step S5, the pickling solution in the second pickling tank is: hydrochloric acid solution with the concentration of 10g/L, the temperature is 60 ℃, and the washing time is 10 s;
s6. chemical plating
Carrying out chemical plating treatment on the steel wire by using mixed copper liquid; the mixed copper liquid comprises 1g/L of copper liquidSnSO4And 35g/LCuSO4After the chemical plating treatment, the quality of the plating layer is required to be 0.21 g/Kg.
S7. resin coating composition
Coating the steel wire subjected to the chemical plating treatment with a resin composition; the resin composition comprises the following raw materials in parts by weight: 90 parts of gasoline, 30 parts of acetone, 10 parts of coumar resin, 10 parts of dicyclopentadiene resin and 10 parts of coumarone-indene resin.
S8, take-up
After coating the resin composition, taking up the wire to obtain the high-strength bead wire for the semi-steel radial tire.
Example 2
S1, paying off
A0.96 mm steel wire (model C70DA) is taken as a basic steel wire and placed on a production line, and the paying-off speed is as follows: 120 m/mim;
s2, degreasing
Degreasing and washing the steel wire by using hot water (80 ℃), degreasing and washing the steel wire by using the surface active composition, and degreasing and washing the steel wire by using the hot water (80 ℃);
s3, tempering
Tempering the degreased steel wire in a medium-frequency induction furnace; the tempering temperature is 440 ℃, and the time is 12 s;
s4, water cooling
Cooling the tempered steel wire to room temperature by using cold water;
s5, acid washing and alkali washing
Orderly passing the steel wire cooled to room temperature through a first pickling tank (electrolytic washing), an alkaline washing tank (electrolytic washing), a second pickling tank and a water washing tank;
wherein, the first pickling tank and the pickling solution are as follows: sulfuric acid solution with concentration of 50g/L and current density of 3A/cm2Washing time 5 s; in step S5, an alkaline washing tank: sodium hydroxide solution with concentration of 100g/L and current density of 3A/cm2Washing time 60 s; in the step S5, the pickling solution in the second pickling tank is: hydrochloric acid solution with the concentration of 20g/L, the temperature is 70 ℃, and the washing time is 15 s;
s6. chemical plating
Carrying out chemical plating treatment on the steel wire by using mixed copper liquid; the mixed copper liquid comprises 3g/L SnSO4And 50g/LCuSO4After chemical plating treatment, the quality of the plating layer is required to be 0.30 g/Kg.
S7. resin coating composition
Coating the steel wire subjected to the chemical plating treatment with a resin composition; the resin composition comprises the following raw materials in parts by weight: 100 parts of gasoline, 40 parts of acetone, 20 parts of coumar resin, 20 parts of dicyclopentadiene resin and 20 parts of coumarone-indene resin.
S8, take-up
After coating the resin composition, taking up the wire to obtain the high-strength bead wire for the semi-steel radial tire.
Example 3
S1, paying off
A0.96 mm steel wire (model C70DA) is taken as a basic steel wire and placed on a production line, and the paying-off speed is as follows: 110 m/mim;
s2, degreasing
Degreasing and washing the steel wire by using hot water (78 ℃), degreasing and washing the steel wire by using the surface active composition, and degreasing and washing the steel wire by using the hot water (78 ℃);
s3, tempering
Tempering the degreased steel wire in a medium-frequency induction furnace; tempering temperature is 435 ℃ and time is 11 s;
s4, water cooling
Cooling the tempered steel wire to room temperature by using cold water;
s5, acid washing and alkali washing
The steel wire cooled to room temperature sequentially passes through a first pickling tank (electrolytic washing), an alkaline washing tank (electrolytic washing), a second pickling tank and a water washing tank;
wherein, the first pickling tank and the pickling solution are as follows: the sulfuric acid solution with the concentration of 45g/L and the current density of 2.5A/cm2Washing time 4 s; in step S5, an alkaline washing tank: sodium hydroxide solution with concentration of 95g/L and current density of 2.5A/cm2Wash time 55 s; in the step S5, the second acid washing tankThe pickling solution is: hydrochloric acid solution with the concentration of 15g/L, the temperature is 65 ℃, and the washing time is 12 s;
s6. chemical plating
Carrying out chemical plating treatment on the steel wire by using mixed copper liquid; the mixed copper liquid comprises 2g/L SnSO4And 45g/LCuSO4After chemical plating treatment, the quality of the plating layer is required to be 0.25 g/Kg.
S7. resin coating composition
Coating the steel wire subjected to the chemical plating treatment with a resin composition; the resin composition comprises the following raw materials in parts by weight: 95 parts of gasoline, 35 parts of acetone, 15 parts of coumarone resin, 15 parts of dicyclopentadiene resin and 15 parts of coumarone-indene resin.
S8, take-up
After coating the resin composition, taking up the wire to obtain the high-strength bead wire for the semi-steel radial tire.
Example 4
S1, paying off
A0.96 mm steel wire (model C70DA) is taken as a basic steel wire and placed on a production line, and the paying-off speed is as follows: 101 m/mim;
s2, degreasing
Degreasing and washing the steel wire by using hot water (79 ℃), degreasing and washing the steel wire by using the surface active composition, and degreasing and washing the steel wire by using hot water (7 ℃);
s3, tempering
Tempering the degreased steel wire in a medium-frequency induction furnace; the tempering temperature is 431 ℃ and the time is 11 s;
s4, water cooling
Cooling the tempered steel wire to room temperature by using cold water;
s5, acid washing and alkali washing
Orderly passing the steel wire cooled to room temperature through a first pickling tank (electrolytic washing), an alkaline washing tank (electrolytic washing), a second pickling tank and a water washing tank;
wherein, the first pickling tank and the pickling solution are as follows: the sulfuric acid solution with the concentration of 41g/L and the current density of 2.9A/cm2Washing time 4.5 s; in the step S5, in the above step,an alkaline washing tank: 91g/L sodium hydroxide solution with current density of 2.9A/cm2Wash time 51 s; in the step S5, the pickling solution in the second pickling tank is: hydrochloric acid solution with the concentration of 19g/L, the temperature is 61 ℃, and the washing time is 12 s;
s6. chemical plating
Carrying out chemical plating treatment on the steel wire by using mixed copper liquid; the mixed copper liquid comprises 1.5g/L SnSO4And 48g/LCuSO4After chemical plating treatment, the quality of the plating layer is required to be 0.29 g/Kg.
S7. resin coating composition
Coating the steel wire subjected to the chemical plating treatment with a resin composition; the resin composition comprises the following raw materials in parts by weight: 91 parts of gasoline, 38 parts of acetone, 11 parts of coumar resin, 18 parts of dicyclopentadiene resin and 11 parts of coumarone-indene resin.
S8, take-up
After coating the resin composition, taking up the wire to obtain the high-strength bead wire for the semi-steel radial tire.
Comparative example 1
In step S5, only one electrolytic acid washing is performed, wherein the acid is 80g/L sulfuric acid solution and the current density is 2A/cm2And washing time is 10 s.
1. The bead wires prepared in examples 1 to 4 and comparative example 1 were subjected to performance tests, and the results are shown in table 1 below:
TABLE 1
| Group of | Break force (N) | Tensile strength (MPa) | Adhesion (N) | Coating percentage (%) |
| Example 1 | 1625 | 2218 | 1539 | 98.5 |
| Example 2 | 1689 | 2278 | 1513 | 98.6 |
| Example 3 | 1711 | 2296 | 1604 | 99.2 |
| Example 3 | 1637 | 2233 | 1547 | 98.1 |
| Comparative example 1 | 890 | 1682 | 1326 | 90 |
From the above table 1, it can be seen that the bead wires prepared in examples 1 to 4 have breaking force of 1625-. In contrast, in comparative example 1, since the steel wire is washed for a long time by using a higher concentration of acid, the steel wire is brittle as compared with hydrogen, the breaking force is 890N, the tensile strength is 1682MPa, poor mechanical properties are shown, and the adhesive force and the coating rate are reduced to a certain extent.
2. The bead wires prepared in the embodiments 1 to 4 are applied to the R215/45R17 tire design, and the rolling resistance coefficient can be reduced by more than 0.2N/KN, so that the fuel/energy consumption economy of the tire can be improved, and the service life of the tire can be prolonged.
3. Flatness test
The integrity of bead wires of length 3m in two parallel lines spaced apart by 200 mm;
example 1-example 4: the integrity is better; comparative example 1: the integrity is poor. It is shown that the steel wires prepared in examples 1 to 4 perform better in terms of steel wire straightness or residual torsion; in contrast, comparative example 1, which used a higher concentration of acid for a long time of washing, the steel wire was more brittle than hydrogen, which affected the integrity and was thus inferior in terms of straightness or residual torsion.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The production process of the high-strength tire bead steel wire for the all-weather low-rolling-resistance semi-steel radial tire is characterized by comprising the following steps of:
s1, paying off
Placing a base material steel wire with the diameter of 0.96mm on a production line, wherein the paying-off speed is as follows: 100-120 m/mim;
s2, degreasing
Degreasing by using hot water, degreasing by using a surface active composition, and degreasing by using hot water;
s3, tempering
Tempering the degreased steel wire in a medium-frequency induction furnace;
s4, water cooling
Cooling the tempered steel wire to room temperature by using cold water;
s5, acid washing and alkali washing
Orderly passing the steel wire cooled to room temperature through a first pickling tank, an alkali washing tank, a second pickling tank and a water washing tank;
s6. chemical plating
Carrying out chemical plating treatment on the steel wire by using mixed copper liquid;
s7. coating resin composition
Coating the steel wire subjected to the chemical plating treatment with a resin composition;
s8, take-up
After coating the resin composition, taking up the wire to obtain the high-strength bead wire for the semi-steel radial tire.
2. The process for producing a high-strength bead wire for an all-weather low-rolling-resistance semi-steel radial tire according to claim 1, wherein in the step S2, the surface active composition comprises the following raw materials in parts by weight: 100 portions of water, 10 to 20 portions of sodium dodecyl benzene sulfonate and 10 to 20 portions of triethanolamine oleate.
3. The process for producing a high-strength bead wire for an all-weather low-rolling-resistance semi-steel radial tire according to claim 1, wherein the temperature of the hot water in the step S2 is 75 to 80 ℃.
4. The process for producing a high-strength bead wire for an all-weather low-rolling-resistance semi-steel radial tire as claimed in claim 1, wherein the tempering temperature in step S3 is 430-440 ℃ for 10-12S.
5. According to claimThe production process of the high-strength bead wire for the all-weather low-rolling-resistance semi-steel radial tire, which is disclosed by claim 1, is characterized in that in the step S5, a first pickling tank is prepared from the following pickling solutions: sulfuric acid solution with concentration of 40-50g/L and current density of 2-3A/cm2And washing time is 3-5 s.
6. The process for producing a high-strength bead wire for an all-weather low-rolling-resistance semi-steel radial tire according to claim 1, wherein in the step S5, the second acid washing tank is a pickling solution comprising: hydrochloric acid solution with concentration of 10-20g/L, temperature of 60-70 deg.C, and washing time of 10-15 s.
7. The process for producing a high-strength bead wire for an all-weather low-rolling-resistance semi-steel radial tire according to claim 1, wherein in said step S5, an alkali bath: sodium hydroxide solution with concentration of 90-100g/L and current density of 2-3A/cm2And washing time is 50-60 s.
8. The process for producing a high-strength bead wire for an all-weather low-rolling-resistance semi-steel radial tire according to claim 1, wherein in the step S6, the mixed copper solution comprises SnSO with a concentration of 1-3g/L4And 35-50g/LCuSO4The quality of the plating layer is required to be 0.21-0.30 g/Kg.
9. The process for producing a high-strength bead wire for an all-weather low-rolling-resistance semi-steel radial tire according to claim 1, wherein in the step S7, the resin composition comprises the following raw materials in parts by weight: 90-100 parts of gasoline, 30-40 parts of acetone, 10-20 parts of coumar resin, 10-20 parts of dicyclopentadiene resin and 10-20 parts of coumarone-indene resin.
10. The bead wire prepared by the production process of the high-strength bead wire for the all-weather low-rolling-resistance semi-steel radial tire as claimed in any one of claims 1 to 9 is characterized by being a wire with the diameter of 0.96mm, the breaking force of the bead wire is more than 1500N, and the tensile strength of the bead wire is more than 2200 MPa.
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| CN202210378593.XA CN114686899A (en) | 2022-04-08 | 2022-04-08 | All-weather low-rolling-resistance high-strength bead wire for semi-steel radial tire and production process thereof |
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| CN202210378593.XA CN114686899A (en) | 2022-04-08 | 2022-04-08 | All-weather low-rolling-resistance high-strength bead wire for semi-steel radial tire and production process thereof |
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