CN109281214A - A kind of steel cord and its manufacturing method and the tire with this steel cord - Google Patents
A kind of steel cord and its manufacturing method and the tire with this steel cord Download PDFInfo
- Publication number
- CN109281214A CN109281214A CN201811468666.4A CN201811468666A CN109281214A CN 109281214 A CN109281214 A CN 109281214A CN 201811468666 A CN201811468666 A CN 201811468666A CN 109281214 A CN109281214 A CN 109281214A
- Authority
- CN
- China
- Prior art keywords
- monofilament
- hardness
- steel cord
- section
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0606—Reinforcing cords for rubber or plastic articles
-
- 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
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/045—Manufacture of wire or bars with particular section or properties
-
- 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
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/047—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine wires
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/02—Carcasses
- B60C9/16—Carcasses built-up with metallic reinforcing inlays
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3021—Metals
- D07B2205/3025—Steel
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2401/00—Aspects related to the problem to be solved or advantage
- D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
- D07B2401/2055—Improving load capacity
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2046—Tire cords
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ropes Or Cables (AREA)
Abstract
The present invention proposes a kind of steel cord and its manufacturing method, it is made of monofilament by twisting using the steel cord of manufacturing method manufacture, the section hardness of monofilament is in "∧" type regular distribution, the section core hardness of monofilament is high and edge hardness is low, and individual filament cross section core hardness and edge nonhomogeneous hardness are between 10Hv ~ 100Hv.There is not lamination during torsion test in monofilament, and fracture of wire is few when monofilament twisting is steel cord in process of production, is suitble to the monofilament of the steel cord of the extra-high strong and above intensity and the batch production of steel cord.The present invention also proposes the tire with this steel cord.
Description
Technical field
The present invention relates to radial with steel cord design and production technical field, in particular to a kind of steel cord and its
Manufacturing method and tire with this steel cord.
Background technique
Steel cord is the main framework material of vehicle radial, and the superiority and inferiority of quality directly affects the use of tire
Service life.Steel cord is the main stressed member of radial, after the intensity and inflation that largely decide tire
Profile, steel cord only have enough strength and stiffness, bearing capacity, security performance, the comfort ability of traveling of tire
It is protected.
For reduce oil consumption, it is energy-saving and environment-friendly consider, present tire for vehicles manufacture just develops towards increasingly lightweight,
The intensity requirement of steel cord for tyre framework material is higher and higher, and special high-strength steel curtain is provided in international standard ISO17832
The monofilament tensile strength of line (UT cord, ultra tensile strength cord) reaches 4400-2000 × D MPa, wherein
D is filament diameter；It also proposed the MT cord (mega tensile strength cord) of higher intensity, monofilament in industry
Tensile strength reaches 4700-2000 × D MPa.The monofilament of this high intensity in the fabrication process, needs to apply strong drawing
Processing hardening, due to usual individual filament cross section core hardness is low and monofilament edge hardness is high, the core of monofilament cross section and edge
Nonhomogeneous hardness is big, and the section hardness of monofilament is distributed in " V " type, and it is existing that layering easily occurs during torsion test in such monofilament
As performance is then monofilament twisting in process of production easy fracture of wire when being steel cord, it is difficult to industrialized production is realized, this is because single
For silk during torsion or twisting, the shear-deformable degree of the core of individual filament cross section is small and the shear-deformable degree of edge is big, so single
Silk section core hardness is low and edge state with high hardness is unfavorable for torsion or twisting.
US588321 proposes a kind of bimodulus drawing process, changes the section of monofilament by way of the drawing deformation of surface
Hardness distribution；In addition, " the Ultra High Tensile Strength of Nippon Steel technical report publication
Steel Cord " the section hardness distribution for improving monofilament is proposed through coefficient of friction variation and curved mode.
But for higher intensity such as UT steel cord, MT steel cord, with upper type, there are still monofilament core hardness is low
And monofilament edge phenomenon with high hardness, it is unfavorable for producing.
Summary of the invention
It is an object of the invention to overcome deficiency in the prior art, a kind of steel cord and its its manufacturing method, steel are provided
There is not lamination during torsion test in cord monofilament, and fracture of wire is few when monofilament twisting is steel cord in process of production,
Conducive to the batch production of steel cord.
To achieve the object of the present invention, a kind of steel cord of the invention is made, the section of monofilament of monofilament by twisting
Hardness is in "∧" type regular distribution, and individual filament cross section hardness is radially gradually reduced to monofilament edge section hardness in core highest,
Individual filament cross section core hardness and edge nonhomogeneous hardness are between 10Hv ~ 100Hv.
Preferably, the carbon content of the monofilament is not less than 0.60%.
Further preferably, the diameter of the monofilament is 0.10mm~0.80mm.
Another object according to the present invention, the invention also discloses a kind of manufacturing methods for manufacturing above-mentioned steel cord, comprising:
S1, steel extend to as defined in be heat-treated after diameter D0, be electroplated；
S2, to the steel wire drawing handled by step S1 to scheduled diameter D1；
S3, intermediate frequency DIFFUSION TREATMENT is carried out to the steel wire handled by step S2, so that the section hardness of steel wire is in "∧" type
The section core hardness of regular distribution, steel wire is high and edge hardness is low；
S4, to the steel wire drawing handled by step S3 at monofilament D2 so that the section hardness of monofilament is in "∧" type rule
The section core hardness of distribution, monofilament is high and edge hardness is low, individual filament cross section core hardness and edge nonhomogeneous hardness 10Hv ~
Between 100Hv；
S5, steel cord is obtained at least one monofilament progress twisting handled by step S4；
Wherein, D0 > D1 > D2.
Preferably, in the step S3, the power of intermediate frequency diffusion is between 10KW ~ 25KW, intermediate frequency diffusion time 0.2 ~ 5
Second.
Further preferably, in step s 2, the true strain of steel wire accounts for really answering for steel wire when D0 is drawn to D2 when D0 is drawn to D1
50% ~ 95% become.
Another object according to the present invention, the invention also discloses a kind of tires comprising above-mentioned steel cord.
The monofilament production process of above-mentioned steel cord of the invention, the high-intensitive monofilament of manufacture during torsion test not
There is lamination, fracture of wire is few when monofilament twisting is steel cord in process of production, is suitble to the steel curtain of the extra-high strong and above intensity
The monofilament of line and the batch production of steel cord meet the light-weighted growth requirement of tire.
Detailed description of the invention
Through the following detailed description taken in conjunction with the accompanying drawings, present invention objects, features and advantages above-mentioned and other will become
Obviously.Wherein:
Fig. 1 show the schematic diagram of steel cord individual filament cross section hardness test position of the invention；
Fig. 2 show the section hardness curve distribution schematic diagram of steel cord monofilament of the invention.
Specific embodiment
Technology contents of the invention, feature and advantage work are further retouched in detail in the following with reference to the drawings and specific embodiments
It states.
A kind of steel cord of one embodiment of the invention, manufacturing method include the following steps:
S1, heat treatment and brass plating processing are carried out to the steel wire for extending to obtain certain diameter D0 by steel；It is obtained by heat treatment
Fine pearlite tissue in order to subsequent further processing, brass plating make steel wire be conducive to subsequent drawing and improve steel cord with
The bonding force of rubber；
S2, to the steel wire handled by step S1 in water tank drawbench by multi pass drawing to diameter D1, or
Dry type steel wire drawing machine is by multi pass drawing to diameter D1；
S3, carry out intermediate frequency DIFFUSION TREATMENT to the steel wire handled by step S2, the power of intermediate frequency diffusion 10KW ~ 25KW it
Between, intermediate frequency diffusion time 0.2 ~ 5 second；
In this step, can be made using mid-frequency induction heating steel wire because mid-frequency induction heating steel wire has kelvin effect
The section hardness of the steel wire of diameter D1 is in "∧" type regular distribution, and the section core hardness of steel wire is high and edge hardness is low.Intermediate frequency
The power and tempering time of diffusion are most important for the treatment effect of steel wire, when power and brownout or intermediate frequency are spread
Between it is too short, then the section hardness distribution of steel wire cannot obtain the states of needs；The power and overtension of intermediate frequency diffusion, Huo Zhezhong
Frequency diffusion time is too long, then steel wire tissue can be made to be carbonized and be unfavorable for subsequent processing.
S4, to the steel wire handled by step S3 in water tank drawbench, be as diameter by multi pass drawing
The monofilament of D2；
S5, steel cord is made in double twisting device or pipe twister twisting to the monofilament handled by step S4.
It is drawn it is worth noting that, the true strain of steel wire is accounted in step S2, when steel wire is drawn to D1 from diameter D0 from diameter D0
The 50% ~ 95% of the true strain of steel wire when pulling out to D2.If the deflection for being drawn to the diameter of D1 in step S2 from diameter D0 is too small,
Individual filament cross section core hardness and monofilament edge nonhomogeneous hardness when following process can be made to be less than 10Hv or even individual filament cross section core hardness
Lower than monofilament edge hardness；If the deflection for being drawn to the diameter of D1 in step S2 from diameter D0 is excessive, monofilament can be made to cut
Face core hardness and monofilament edge nonhomogeneous hardness are greater than 100Hv or the elongation percentage of monofilament changes.
Section hardness by the above-mentioned step S1-S4 monofilament handled is in "∧" type regular distribution, the section core of monofilament
Portion's hardness is high and edge hardness is low, and the section core hardness and monofilament edge nonhomogeneous hardness of monofilament are single between 10Hv ~ 100Hv
There is not lamination during torsion test in silk, fracture of wire when process, that is, monofilament twisting by step S5 processing is steel cord
Less, it can be achieved that the industrialized production of high-intensitive steel cord.
In a preferred embodiment, in order to reach preferable effect, the carbon content of the monofilament is not less than
0.60%；In another preferred embodiment, the diameter of monofilament made from the preparation method is 0.10mm~0.80mm.
The section hardness distribution that monofilament is made in the method according to the invention can be used under type such as and detect:
As shown in Figure 1, the section to monofilament is measured from two orthogonal rectilinear directions of X, Y using hardness tester respectively,
Position 4 is the section core of monofilament, position 1 and position 7 be the section edge of monofilament, position 1 or position 7 and monofilament surface away from
From being less than the 10% of filament diameter, position 2 and position 3 are that distance divides equally 1/3,2/3 between position 1 and position 4 respectively, position 5
And position 6 be respectively between position 4 and position 7 distance divide equally 1/3,2/3.
The section hardness testing result of monofilament of the invention is as shown in Fig. 2, section hardness is in "∧" type regular distribution, monofilament
Section hardness is radially gradually reduced in core highest.The section core hardness of monofilament is referred to monofilament edge nonhomogeneous hardness
In X direction or Y-direction detection core position 4 and other positions between hardness maximum difference.
Embodiment 1:
It uses diameter 2.30mm heat treatment metal plated steel wire drawing for diameter 0.75mm steel wire, then carries out at intermediate frequency diffusion in 0.8 second
Reason, EF power 20KW, then drawing is diameter 0.35mm monofilament, and the true strain of steel wire accounts for when 2.30mm is drawn to 0.75mm
The 60% of the true strain of steel wire when 2.30mm is drawn to 0.35mm, twisting becomes the steel cord of 2+2 × 0.35 on double twisting device.
Embodiment 2:
It uses diameter 2.30mm heat treatment metal plated steel wire drawing for diameter 0.50mm steel wire, then carries out 2 seconds intermediate frequency DIFFUSION TREATMENTs,
EF power 12KW, then drawing is diameter 0.35mm monofilament, and the true strain of steel wire accounts for when 2.30mm is drawn to 0.50mm
The 81% of the true strain of steel wire when 2.30mm is drawn to 0.35mm, twisting becomes the steel cord of 2+2 × 0.35 on double twisting device.
For manufacturing the mutually isostructural steel cord in 2+2 × 0.35, the comparative example of the present invention and the prior art is compared
Test, test result are shown in Table 1.
As it can be seen from table 1 monofilament reverses not stratified, the section of monofilament in the embodiment of the present invention 1 ~ 2 compared with comparative example 1
Core hardness is high and edge hardness is low, manufactures the twisting wire broken rate of steel cord far below comparative example 1.
The present invention is not limited to the described embodiments, and those skilled in the art is not departing from spirit of the invention i.e. public affairs
Open in range, still may make some modifications or changes, thus the range that is limited with claims of the scope of the present invention as
It is quasi-.
Claims (7)
1. a kind of steel cord is made of monofilament by twisting, which is characterized in that the section hardness of the monofilament of the steel cord
In "∧" type regular distribution, individual filament cross section hardness is radially gradually reduced to monofilament edge section hardness, monofilament in core highest
Section core hardness and edge nonhomogeneous hardness are between 10Hv ~ 100Hv.
2. a kind of steel cord as described in claim 1, which is characterized in that the carbon content of the monofilament is not less than 0.60%.
3. a kind of steel cord as claimed in claim 1 or 2, which is characterized in that the diameter of the monofilament be 0.10mm~
0.80mm。
4. a kind of manufacturing method of steel cord of manufacture as described in claims 1 or 2 or 3, which is characterized in that the manufacturer
Method includes the following steps:
S1, steel extend to as defined in be heat-treated after diameter D0, be electroplated；
S2, to the steel wire drawing handled by step S1 to scheduled diameter D1；
S3, intermediate frequency DIFFUSION TREATMENT is carried out to the steel wire handled by step S2, so that the section hardness of steel wire is in "∧" type
The section core hardness of regular distribution, steel wire is high and edge hardness is low；
S4, to the steel wire drawing handled by step S3 at monofilament D2 so that the section hardness of monofilament is in "∧" type rule
The section core hardness of distribution, monofilament is high and edge hardness is low, individual filament cross section core hardness and edge nonhomogeneous hardness 10Hv ~
Between 100Hv；
S5, steel cord is obtained at least one monofilament progress twisting handled by step S4；
Wherein, D0 > D1 > D2.
5. a kind of manufacturing method of steel cord as claimed in claim 4, which is characterized in that in the step S3, intermediate frequency diffusion
Power between 10KW ~ 25KW, intermediate frequency diffusion time 0.2 ~ 5 second.
6. a kind of manufacturing method of steel cord as claimed in claim 4, which is characterized in that in step s 2, D0 is drawn to D1
The true strain of Shi Gangsi accounts for 50% ~ 95% of the true strain of steel wire when D0 is drawn to D2.
7. a kind of tire, which is characterized in that the tire includes being manufactured according to the manufacturing method of any one of claim 4-6
Steel cord.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811468666.4A CN109281214A (en) | 2018-12-03 | 2018-12-03 | A kind of steel cord and its manufacturing method and the tire with this steel cord |
| PCT/CN2018/120154 WO2020113606A1 (en) | 2018-12-03 | 2018-12-10 | Steel cord and manufacturing method therefor, and tire provided with steel cord |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811468666.4A CN109281214A (en) | 2018-12-03 | 2018-12-03 | A kind of steel cord and its manufacturing method and the tire with this steel cord |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109281214A true CN109281214A (en) | 2019-01-29 |
Family
ID=65174494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811468666.4A Pending CN109281214A (en) | 2018-12-03 | 2018-12-03 | A kind of steel cord and its manufacturing method and the tire with this steel cord |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109281214A (en) |
| WO (1) | WO2020113606A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02163320A (en) * | 1988-12-19 | 1990-06-22 | Nhk Spring Co Ltd | Production of steel products and high-strength steel products |
| JPH06184965A (en) * | 1992-12-18 | 1994-07-05 | Bridgestone Corp | Steel cord |
| CN101389778A (en) * | 2006-02-28 | 2009-03-18 | 株式会社神户制钢所 | Wire with excellent suitability for drawing and process for producing the same |
| CN101983247A (en) * | 2008-03-31 | 2011-03-02 | 高周波热练株式会社 | Steel material, process for producing steel material, and apparatus for producing steel material |
| CN105829408A (en) * | 2013-12-19 | 2016-08-03 | 米其林集团总公司 | Multi-composite reinforcement for a tyre |
| CN105960478A (en) * | 2014-02-06 | 2016-09-21 | 新日铁住金株式会社 | Filament |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005054260A (en) * | 2003-08-07 | 2005-03-03 | Kobe Steel Ltd | Method of producing extra fine steel wire for steel cord, and steel cord |
| WO2014208492A1 (en) * | 2013-06-24 | 2014-12-31 | 新日鐵住金株式会社 | High-carbon steel wire rod and method for manufacturing same |
| JP5900710B2 (en) * | 2014-03-06 | 2016-04-06 | 新日鐵住金株式会社 | High carbon steel wire rod excellent in wire drawing workability and its manufacturing method |
-
2018
- 2018-12-03 CN CN201811468666.4A patent/CN109281214A/en active Pending
- 2018-12-10 WO PCT/CN2018/120154 patent/WO2020113606A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02163320A (en) * | 1988-12-19 | 1990-06-22 | Nhk Spring Co Ltd | Production of steel products and high-strength steel products |
| JPH06184965A (en) * | 1992-12-18 | 1994-07-05 | Bridgestone Corp | Steel cord |
| CN101389778A (en) * | 2006-02-28 | 2009-03-18 | 株式会社神户制钢所 | Wire with excellent suitability for drawing and process for producing the same |
| CN101983247A (en) * | 2008-03-31 | 2011-03-02 | 高周波热练株式会社 | Steel material, process for producing steel material, and apparatus for producing steel material |
| CN105829408A (en) * | 2013-12-19 | 2016-08-03 | 米其林集团总公司 | Multi-composite reinforcement for a tyre |
| CN105960478A (en) * | 2014-02-06 | 2016-09-21 | 新日铁住金株式会社 | Filament |
Non-Patent Citations (1)
| Title |
|---|
| 王庆娟等编: "《金属塑性加工概论》", 31 December 2015, 冶金工业出版社 * |
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| Publication number | Publication date |
|---|---|
| WO2020113606A1 (en) | 2020-06-11 |
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Application publication date: 20190129 |