CN114589952A - Tire bead steel wire and manufacturing method thereof - Google Patents
Tire bead steel wire and manufacturing method thereof Download PDFInfo
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- CN114589952A CN114589952A CN202210172112.XA CN202210172112A CN114589952A CN 114589952 A CN114589952 A CN 114589952A CN 202210172112 A CN202210172112 A CN 202210172112A CN 114589952 A CN114589952 A CN 114589952A
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- matrix
- steel wire
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- carbon content
- bead
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- 239000011324 bead Substances 0.000 title claims abstract description 70
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 45
- 239000010959 steel Substances 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000011159 matrix material Substances 0.000 claims abstract description 52
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 47
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 47
- 239000002344 surface layer Substances 0.000 claims abstract description 35
- 238000007747 plating Methods 0.000 claims abstract description 22
- 238000005496 tempering Methods 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 22
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 7
- 238000005255 carburizing Methods 0.000 claims description 7
- 238000005554 pickling Methods 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 2
- 239000000758 substrate Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 229910000906 Bronze Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000010974 bronze Substances 0.000 description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000010058 rubber compounding Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
-
- 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
- C23C18/1848—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by electrochemical pretreatment
-
- 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
- C23C18/48—Coating with alloys
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0607—Wires
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
- C25F3/06—Etching of iron or steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
- B29D2030/487—Forming devices for manufacturing the beads
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Electroplating Methods And Accessories (AREA)
- Tires In General (AREA)
Abstract
The invention discloses a tire bead steel wire and a manufacturing method thereof. Wherein the carbon content of the matrix surface layer of the tire bead steel wire is 1.01-1.50 times of the carbon content of the matrix. The manufacturing method comprises the following steps: s1, processing the steel wire to obtain a preset wire diameter; s2, tempering the steel wire; s3, carrying out surface recarburization treatment on the steel wire to ensure that the carbon content of the surface layer of the matrix of the steel wire is 1.01-1.50 times of the carbon content of the matrix; and S4, cleaning the steel wire, and plating to obtain the finished product of the tire bead steel wire. Wherein the step of S3 can be performed before or after S2. The bead wire of the present invention has good adhesion.
Description
Technical Field
The invention relates to the technical field of rubber products, in particular to a tire bead steel wire and a manufacturing method thereof.
Background
Radial tires are generally composed of a crown, sidewalls, and beads, which are tightened against a rim to provide a support point for the tire carcass, which bears the outward expansion pressure of the carcass and the lateral forces during cornering of the tire. The tire bead consists of a steel wire ring, a tire bead wrapping cloth and the like, and the steel wire used for manufacturing the steel wire ring is the tire bead steel wire. The bead wire is required to have high strength, excellent adhesion, and other properties. The bead wires have a circular cross-section, a rectangular cross-section, a polygonal cross-section, etc., wherein bead wires of circular cross-section are more common. The surface of the bead wire is generally required to be covered with a tin bronze plating layer, and also covered with a brass plating layer, a zinc layer or the like, so as to improve the adhesion between the bead wire and the rubber. The bead wire is also coated with a resin coating on the surface to further improve the adhesion between the bead wire and the rubber. The bonding performance of the bead wire and the rubber is not only dependent on the wire, but also has close relation with the rubber formula. When the rubber formulation is fixed, the adhesion is generally ensured and improved by controlling the surface condition of the bead wire, the coating composition, the coating thickness and the coating composition. However, high performance tires still require a bead wire with higher adhesion performance.
Disclosure of Invention
The invention aims to provide a bead wire with good bonding performance and a manufacturing method thereof.
In order to achieve the purpose, the invention discloses a tire bead steel wire, wherein the carbon content of the surface layer of a matrix of the tire bead steel wire is 1.01-1.50 times of that of the matrix.
The carbon content of the matrix surface layer of the tire bead steel wire is distributed in a gradient decreasing manner from outside to inside.
Wherein the base surface layer of the bead wire means the interval from the wire surface to a depth of about 0.1 μm below the coating or layer. The inner layer of the matrix is below the surface layer of the matrix. The substrate comprises a substrate surface layer and a substrate inner layer. Because the proportion of the interval of the surface layer of the matrix to the matrix is small, the carbon content of the matrix is approximately equal to that of the inner layer of the matrix.
The carbon content of the matrix surface layer of the tire bead steel wire is less than 1.01 times of the carbon content of the matrix, and the influence on the adhesive property of the steel wire and rubber is not obvious. The carbon content of the matrix surface layer of the tire bead steel wire is 1.50 times higher than that of the matrix, so that the combination of the coating and the steel wire matrix is influenced, and the adhesion of the steel wire and the rubber is not facilitated.
Preferably, the carbon content of the base material of the bead wire is 0.60 to 1.00 wt%. A carbon content of the matrix material of less than 0.60% weakens the effect of increasing the carbon content of the matrix surface layer, and at the same time, lowers the strength of the bead wire. The carbon content of the matrix material is higher than 1.00%, which results in poor plasticity of the bead wire.
Preferably, the surface of the matrix of the bead wire is covered with a copper alloy plating layer. The copper alloy plating includes tin bronze plating, brass plating, and the like.
Preferably, the thickness of the copper alloy plating layer is 0.05-0.20 μm. A thickness of the plated layer of less than 0.05 d may weaken the effect of the plated layer on enhancing the adhesion of the steel wire to the rubber. The thickness of the plating layer is higher than 0.20 μm, which may hinder the carbon element on the surface layer of the substrate from reacting with the rubber.
The invention also discloses a manufacturing method for manufacturing the bead wire, which comprises the following steps:
s1, processing the steel wire to obtain a preset wire diameter;
s2, tempering the steel wire;
s3, performing surface recarburization treatment on the steel wire to ensure that the carbon content of the surface layer of the matrix of the steel wire is 1.01-1.50 times of that of the matrix;
s4, cleaning the steel wire and plating a plating layer to obtain a finished product of the tire bead steel wire;
wherein the step of S3 may also be performed before S2.
Preferably, the surface recarburization treatment in the step S3 is electrochemical pickling. The electrochemical pickling washes out the iron on the surface layer of the steel wire by reacting the iron on the surface layer of the steel wire with acid, so that the carbon content of the surface layer of the steel wire is higher than that of the steel wire matrix.
Preferably, the surface carburizing treatment in the S3 step is a surface carburizing treatment at a temperature of not higher than 250 ℃. The temperature of the surface carburizing treatment is higher than 250 ℃, which causes a great reduction in the strength of the bead wire.
The invention has the beneficial effects that: the bead wire of the present invention has higher adhesion by the surface carburation treatment.
Drawings
FIG. 1 is a schematic cross-sectional view of a bead wire of the present invention;
wherein: 10-tire bead steel wire, 11-plating layer or coating layer, 12-matrix surface layer and 13-matrix inner layer.
Detailed Description
The invention is further described with reference to specific examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The inventor finds that the surface layer of the tire bead steel wire matrix is enriched with a certain amount of carbon, and the adhesive property of the tire bead steel wire and rubber can be obviously improved. Based on this, the present invention provides a bead wire.
As shown in fig. 1, a bead wire 10 includes a base including a base inner layer 13 of the bead wire and a base skin layer 12 of the bead wire.
The depth of the substrate surface layer 12 is about 0.1 μm. Since the area of the matrix surface layer 12 is small in proportion to the matrix, the carbon content of the matrix is approximately equal to the carbon content of the matrix inner layer 13.
Wherein the carbon content of the matrix surface layer 12 of the bead wire is 1.01-1.50 times of the carbon content of the matrix.
The carbon content of the matrix surface layer 12 of the bead wire is distributed in a gradient manner from outside to inside.
The carbon content of the base material of the bead wire is 0.60 to 1.00 wt%.
As shown in fig. 1, the base surface of the bead wire is also covered with a plating or coating 11, such as a copper alloy plating. The thickness of the copper alloy coating is 0.05-0.20 μm.
The carbon content of the bead wire base surface layer 12 can be increased by the steel wire surface carburant treatment. The recarburization treatment includes, but is not limited to, electrochemical pickling, low-temperature surface carburizing treatment, and the like.
Examples 1 to 3
Examples 1-3 1.65mm bead wires were produced by drawing 5.50mm wire rods having a carbon content of 0.72% by weight to 1.65mm, tempering the wire rods in an intermediate frequency furnace at 20KW and then applying a 50A/dm2Electrolytic sulfuric acid washing of current for recarburizing surface of steel wire matrix, and final treatmentAnd plating a tin bronze plating layer. The carbon content of the matrix of the bead wire is 0.72 wt%, and samples with different carbon contents of the matrix surface are obtained by adjusting different electrolytic sulfuric acid washing times. Wherein the carbon content of the surface layer of the substrate of example 1 was 0.85 wt%, the carbon content of the surface layer of the substrate was 1.18 times the carbon content of the substrate; the carbon content of the surface layer of the substrate of example 2 was 0.75 wt%, and the carbon content of the surface layer of the substrate was 1.04 times the content of the substrate; the carbon content of the surface layer of the substrate of example 3 was 1.05 wt%, and the carbon content of the surface layer of the substrate was 1.46 times the content of the substrate.
For the 1.65mm bead wire of comparative example 1, which was manufactured to the same specification, the carbon content of both the matrix surface layer and the matrix was 0.72 wt%. Examples 1-3 were compared to a prior art comparative example and the results are shown in table 1.
TABLE 1
As can be seen from Table 1, the present examples 1 to 3 have higher adhesive force than comparative example 1.
Example 4
Example 4 is a 2.00mm bead wire produced by drawing a 5.50mm wire rod having a carbon content of 0.82 wt% to 2.00mm, then subjecting the wire rod to surface carburization at 150 ℃, then subjecting the wire rod to tempering in an intermediate frequency furnace at a power of 25KW, and finally plating a tin bronze plating layer. The carbon content of the matrix of the bead wire was 0.82 wt%, the carbon content of the matrix surface layer was 1.15 wt%, and the carbon content of the matrix surface layer was 1.40 times the carbon content of the matrix.
For the 2.00mm bead wire of comparative example 2 manufactured in the same specification, the carbon contents of the matrix surface layer and the matrix were each 0.82 wt%. Comparative tests were conducted on this example and a comparative example of the prior art, and the test results are shown in Table 2.
TABLE 2
As can be seen from table 2, example 4 has higher adhesive force than comparative example 2.
As can be seen from the above examples, the bead wire of the present invention has higher adhesion by the surface carburising treatment.
The bead wire of the present invention can be applied to rubber products including tires, hoses, and the like.
The present invention has been disclosed in terms of the preferred embodiment, but is not intended to be limited to the embodiment, and all technical solutions obtained by substituting or converting equivalents thereof fall within the scope of the present invention.
Claims (8)
1. A bead wire characterized in that the carbon content of the matrix surface layer of the bead wire is 1.01 to 1.50 times the carbon content of the matrix.
2. Bead wire according to claim 1, wherein the carbon content of the matrix skin of said bead wire is distributed in a gradient decreasing from the outside to the inside.
3. Bead wire according to claim 1 or 2, wherein the carbon content of the matrix material of the bead wire is 0.60-1.00 wt%.
4. Bead wire according to any one of claims 1 to 3, wherein the base surface of the bead wire is covered with a copper alloy plating.
5. The bead wire according to claim 4, wherein said copper alloy plating layer has a thickness of 0.05 to 0.20 μm.
6. A manufacturing method of a bead wire according to any one of claims 1 to 3, comprising:
s1, processing the steel wire to obtain a preset wire diameter;
s2, tempering the steel wire;
s3, performing surface recarburization treatment on the steel wire to ensure that the carbon content of the surface layer of the matrix of the steel wire is 1.01-1.50 times of that of the matrix;
s4, cleaning the steel wire and plating a plating layer to obtain a finished product of the tire bead steel wire;
wherein the step of S3 may also be performed before S2.
7. The method for manufacturing a bead wire according to claim 6, wherein said surface carburizing treatment is electrochemical pickling.
8. The method for manufacturing a bead wire according to claim 6, wherein the surface carburizing treatment is a surface carburizing treatment at a temperature of not higher than 250 ℃.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210172112.XA CN114589952A (en) | 2022-02-24 | 2022-02-24 | Tire bead steel wire and manufacturing method thereof |
| PCT/CN2022/078135 WO2023159531A1 (en) | 2022-02-24 | 2022-02-28 | Bead wire and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210172112.XA CN114589952A (en) | 2022-02-24 | 2022-02-24 | Tire bead steel wire and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114589952A true CN114589952A (en) | 2022-06-07 |
Family
ID=81805733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210172112.XA Pending CN114589952A (en) | 2022-02-24 | 2022-02-24 | Tire bead steel wire and manufacturing method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114589952A (en) |
| WO (1) | WO2023159531A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3749558A (en) * | 1970-02-12 | 1973-07-31 | Gen Etablissements Michelin | Nickel-coated steel core wires and cables |
| JPH0466647A (en) * | 1990-07-07 | 1992-03-03 | Kobe Steel Ltd | Hot-dip galvanized cold rolled steel sheet for deep drawing having galvanized film excellent in adhesion and its manufacture |
| JP2005290433A (en) * | 2004-03-31 | 2005-10-20 | Kanai Hiroaki | Bead wire for tire |
| CN1796591A (en) * | 2004-10-27 | 2006-07-05 | 固特异轮胎和橡胶公司 | Carburized wire and method for producing the same |
| CN1873039A (en) * | 2005-05-31 | 2006-12-06 | 大连荣创科技发展有限公司 | High carbon, silicon contained high-speed steel in superhard, and high toughness |
| US20170044642A1 (en) * | 2014-04-24 | 2017-02-16 | Nippon Steel & Sumitomo Metal Corporation | Filament for high strength steel cord |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8424086D0 (en) * | 1984-09-24 | 1984-10-31 | Bekaert Sa Nv | Steel cord |
| JP2642547B2 (en) * | 1991-10-16 | 1997-08-20 | 新日本製鐵株式会社 | Method for producing high-strength bead wire with excellent ductility |
| JPH08253004A (en) * | 1994-12-14 | 1996-10-01 | Bridgestone Corp | Highly endurable pneumatic steel radial tire |
| JP3242019B2 (en) * | 1997-01-31 | 2001-12-25 | 住友電気工業株式会社 | High-strength bead wire, wire material for bead wire, and production method thereof |
| WO2010140521A1 (en) * | 2009-06-05 | 2010-12-09 | 不二商事 株式会社 | Tyre bead wire and process for production thereof |
| CN103357694A (en) * | 2013-07-25 | 2013-10-23 | 张家港市胜达钢绳有限公司 | Method for producing tire bead steel wire |
| CN105483556B (en) * | 2015-12-24 | 2017-10-10 | 江苏兴达钢帘线股份有限公司 | A kind of preparation method of high intensity steel bead wire material reinforcement method and steel bead wire |
-
2022
- 2022-02-24 CN CN202210172112.XA patent/CN114589952A/en active Pending
- 2022-02-28 WO PCT/CN2022/078135 patent/WO2023159531A1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3749558A (en) * | 1970-02-12 | 1973-07-31 | Gen Etablissements Michelin | Nickel-coated steel core wires and cables |
| JPH0466647A (en) * | 1990-07-07 | 1992-03-03 | Kobe Steel Ltd | Hot-dip galvanized cold rolled steel sheet for deep drawing having galvanized film excellent in adhesion and its manufacture |
| JP2005290433A (en) * | 2004-03-31 | 2005-10-20 | Kanai Hiroaki | Bead wire for tire |
| CN1796591A (en) * | 2004-10-27 | 2006-07-05 | 固特异轮胎和橡胶公司 | Carburized wire and method for producing the same |
| CN1873039A (en) * | 2005-05-31 | 2006-12-06 | 大连荣创科技发展有限公司 | High carbon, silicon contained high-speed steel in superhard, and high toughness |
| US20170044642A1 (en) * | 2014-04-24 | 2017-02-16 | Nippon Steel & Sumitomo Metal Corporation | Filament for high strength steel cord |
Non-Patent Citations (1)
| Title |
|---|
| 高原等: "酸洗参数对胎圈钢丝与橡胶黏合力的影响", 《金属制品》 * |
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| Publication number | Publication date |
|---|---|
| WO2023159531A1 (en) | 2023-08-31 |
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Application publication date: 20220607 |