CN111558624A - Steel cord capable of effectively reducing central burst and wire drawing processing method thereof - Google Patents
Steel cord capable of effectively reducing central burst and wire drawing processing method thereof Download PDFInfo
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- CN111558624A CN111558624A CN202010415904.6A CN202010415904A CN111558624A CN 111558624 A CN111558624 A CN 111558624A CN 202010415904 A CN202010415904 A CN 202010415904A CN 111558624 A CN111558624 A CN 111558624A
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- plating
- wire
- steel cord
- steel
- setting
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 53
- 239000010959 steel Substances 0.000 title claims abstract description 53
- 238000005491 wire drawing Methods 0.000 title claims description 26
- 238000003672 processing method Methods 0.000 title abstract description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000007747 plating Methods 0.000 claims description 25
- 239000012792 core layer Substances 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004939 coking Methods 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 238000009713 electroplating Methods 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims 1
- 229910001566 austenite Inorganic materials 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 229910052804 chromium Inorganic materials 0.000 abstract description 4
- 239000011651 chromium Substances 0.000 abstract description 4
- 239000000835 fiber Substances 0.000 abstract description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 3
- 229910001562 pearlite Inorganic materials 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 229910017052 cobalt Inorganic materials 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- -1 titanium carbide compound Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910001563 bainite Inorganic materials 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Images
Classifications
-
- 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
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ropes Or Cables (AREA)
Abstract
The invention provides a steel cord capable of effectively reducing central burst and a drawing processing method thereof, wherein the content of chromium in an original material coil is controlled, the existence of the chromium is beneficial to forming a compact flaky structure on the surface of a steel wire, the fiber strength is improved, the austenite residue in the heat treatment process caused by excessive pearlite is avoided, and the difficulty in removing surface acidizing substances in the mechanical rust removal process is reduced.
Description
Technical Field
The invention relates to the field of steel cord processing, in particular to a steel cord capable of effectively reducing central burst and a drawing processing method thereof.
Background
The steel cord is a framework supporting material in the tire, the steel cord needs to be subjected to frequent wiredrawing operation for many times in the processing process, a raw material coil is drawn into a slender steel wire, and the slender steel wire is twisted into the steel cord after being electroplated, and the technical difficulty lies in that the fracture phenomenon in the wiredrawing process is general and difficult to control. In order to solve the problem, the invention departs from the thought dilemma of the prior art, starts from the source, researches the optimal dosage of each element in the raw material coil under different element contents, and designs the steel cord capable of effectively reducing central burst and the wire drawing processing method thereof by matching with the control of a wire drawing machine and the production data of wire drawing liquid.
Disclosure of Invention
In view of the above technical problems, the present invention provides a steel cord which can effectively reduce center burst,
the method comprises the following steps:
the core layer is formed by twisting three plating steel wires, the contact surface of the three plating steel wires is a flat surface, the diameter of the plating steel wire is 0.1mm to 0.3mm, the carbon content of the plating steel wire is 0.85% to 1.4%, the manganese content is 0.23% to 0.72%, the silicon content is 0.5% to 0.67%, and the diameter of the second twisting layer is 0.95 times to 1 time of that of the core layer.
Preferably, the carbon content is most preferably 0.9% to 1.2%.
A steel cord drawing processing method capable of effectively reducing central burst is characterized in that:
firstly, carrying out rough drawing and medium drawing, selecting raw material coils, adopting a straight-moving type wire drawing machine, using alternating current to carry out variable frequency speed regulation, setting the wire drawing speed to be 10-15 m/s during rough drawing, setting the concentration of wire drawing liquid to be 15-18% during rough drawing, setting the wire drawing speed to be 18-20 m/s during medium drawing, setting the concentration of the wire drawing liquid to be 7-8% during medium drawing, setting the temperature of the wire drawing liquid to be 30-45 ℃, and carrying out isothermal heat treatment between rough drawing and medium drawing;
secondly, processing a coating, wherein a thermal diffusion electroplating mode is adopted during copper plating, pre-plating is firstly carried out, the drawn steel wire is processed by phosphoric acid through coking, copper plating is carried out by persulfate after pre-plating, zinc plating is carried out by persulfate finally, and heat treatment is synchronously carried out in the coating process;
thirdly, passing through a boiling furnace, wherein the temperature of the boiling furnace is set to be 500-700 ℃, so that the metallographic phase of copper and zinc is thermally diffused;
fourthly, drawing the monofilament, adopting alternating current frequency conversion speed regulation, drawing for 25 times, setting the drawing speed to be lower than 25m/s, and manufacturing a coated steel wire with the thickness of 0.1-0.3 mm, wherein the thickness of the coating is 0.01-0.1 time of that of the raw steel wire;
fifthly, twisting the steel cord by a twisting machine and externally winding the steel cord.
Preferably, the content of chromium element in the selected raw material disc material is 0.002% to 0.45%, and the content of titanium element is 0.005% to 0.1%.
Has the advantages that:
1. according to the invention, the content of chromium in the raw material disc material is controlled, the existence of chromium is beneficial to forming a compact lamellar structure on the surface of the steel wire, the fiber strength is improved, the austenite residue in the heat treatment process caused by excessive pearlite inhibition is avoided, and the difficulty in removing surface acidizing substances in the mechanical rust removal process is reduced.
2. The invention can accurately control the content of titanium element, and inhibit the formation of nitride and the coarsening of austenite particle diameter.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
The figures in the drawings represent:
1. core layer 2, first twist layer 3, second twist layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, the present invention provides a steel cord capable of effectively reducing central burst, which includes a core layer, a first twisted layer wrapped outside the core layer, and a second twisted layer wrapped outside the first twisted layer, wherein the diameter of the first twisted layer is 1 to 1.2 times that of the core layer, the core layer is twisted from three plated steel wires, the core layer is formed by twisting three plated steel wires, the core layer is pressed toward the core center during twisting, so that the contact surfaces of the three plated steel wires are flat surfaces, the diameter of the plated steel wire is 0.1 to 0.3mm, the carbon content in the plated steel wire is 0.85 to 1.4%, the manganese content is 0.23 to 0.72%, the silicon content is 0.5 to 0.67%, and the diameter of the second twisted layer is 0.95 to 1 time that of the core layer, wherein the carbon content is most preferably 0.9 to 1.2%.
The invention provides a steel cord drawing processing method capable of effectively reducing central burst, which is characterized by comprising the following steps:
firstly, carrying out rough drawing and medium drawing, selecting raw material coils, adopting a straight-moving type wire drawing machine, using alternating current to carry out variable frequency speed regulation, setting the wire drawing speed to be 10-15 m/s during rough drawing, setting the concentration of wire drawing liquid to be 15-18% during rough drawing, setting the wire drawing speed to be 18-20 m/s during medium drawing, setting the concentration of the wire drawing liquid to be 7-8% during medium drawing, setting the temperature of the wire drawing liquid to be 30-45 ℃, and carrying out isothermal heat treatment between rough drawing and medium drawing;
secondly, processing a coating, wherein a thermal diffusion electroplating mode is adopted during copper plating, pre-plating is firstly carried out, the drawn steel wire is processed by phosphoric acid through coking, copper plating is carried out by persulfate after pre-plating, zinc plating is carried out by persulfate finally, and heat treatment is synchronously carried out in the coating process;
thirdly, passing through a boiling furnace, wherein the temperature of the boiling furnace is set to be 500-700 ℃, so that the metallographic phase of copper and zinc is thermally diffused;
fourthly, drawing the monofilament, adopting alternating current frequency conversion speed regulation, drawing for 25 times, setting the drawing speed to be lower than 25m/s, and manufacturing a coated steel wire with the thickness of 0.1-0.3 mm, wherein the thickness of the coating is 0.01-0.1 time of that of the raw steel wire;
fifthly, twisting the steel cord by a twisting machine and externally winding the steel cord.
In the invention, the content of chromium element in the selected raw material plate is 0.002-0.45%, and the content of titanium element is 0.005-0.1%.
Controlling the chromium element to be more than 0.002% is beneficial to forming a compact sheet structure on the surface of the steel wire, improving the fiber strength and controlling the chromium element to be less than 0.45%, because over 0.45%, pearlite is excessively inhibited, a large amount of austenite is remained after heat treatment, so that a super-cooled structure of bainite and martensite is further generated, and the defects of the overall mechanical properties are caused, the generation of the super-cooled structure is avoided most in metal processing, so the content of the chromium element can never exceed 0.45%, and the principle of adding less chromium element and not more chromium element in the actual production of the raw material coil is adopted.
The reason why the titanium element is controlled to be 0.005% or more in the present invention is that: on one hand, the existence of titanium element has a certain deacidification effect, which is beneficial to later-stage rust removal, and on the other hand, the formation of nitride and the coarsening of austenite particle diameter can be inhibited. The content of the titanium carbide compound is not more than 0.1 percent, and the titanium carbide compound with larger particles can be generated after the content of the titanium carbide compound exceeds 0.1 percent, and the existence of the titanium carbide compound can generate certain obstruction to wire drawing operation, influence the processability of steel wires, generate the changing influence on preset data such as tension and the like, and have poor controllability.
The selection of the raw material disc material can also consider the content of cobalt element, the content of the cobalt element is preferably 0-0.5%, because the cobalt element can effectively inhibit the precipitation of proeutectoid cementite, the effect is saturated after the cobalt element exceeds 0.5%, no obvious side effect is generated, but the cost is wasted.
Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
Claims (4)
1. A steel cord effective for reducing center burst, characterized in that: the core layer is formed by twisting three plating steel wires, the core layer is formed by pressing the core center during twisting, so that the contact surfaces of the three plating steel wires are flat surfaces, the diameter of each plating steel wire is 0.1-0.3 mm, the carbon content of each plating steel wire is 0.85-1.4%, the manganese content of each plating steel wire is 0.23-0.72%, the silicon content of each plating steel wire is 0.5-0.67%, and the diameter of the second twisted layer is 0.95-1 times of that of the core layer.
2. A steel cord effective for reducing center burst according to claim 1, characterized in that: the carbon content is most preferably 0.9% to 1.2%.
3. A steel cord drawing process effective in reducing center burst as claimed in claim 2, wherein: firstly, carrying out rough drawing and medium drawing, selecting raw material coils, adopting a straight-moving type wire drawing machine, using alternating current to carry out variable frequency speed regulation, setting the wire drawing speed to be 10-15 m/s during rough drawing, setting the concentration of wire drawing liquid to be 15-18% during rough drawing, setting the wire drawing speed to be 18-20 m/s during medium drawing, setting the concentration of the wire drawing liquid to be 7-8% during medium drawing, setting the temperature of the wire drawing liquid to be 30-45 ℃, and carrying out isothermal heat treatment between rough drawing and medium drawing; secondly, processing a coating, wherein a thermal diffusion electroplating mode is adopted during copper plating, pre-plating is firstly carried out, the drawn steel wire is processed by phosphoric acid through coking, copper plating is carried out by persulfate after pre-plating, zinc plating is carried out by persulfate finally, and heat treatment is synchronously carried out in the coating process; thirdly, passing through a boiling furnace, wherein the temperature of the boiling furnace is set to be 500-700 ℃, so that the metallographic phase of copper and zinc is thermally diffused; fourthly, drawing the monofilament, adopting alternating current frequency conversion speed regulation, drawing for 25 times, setting the drawing speed to be lower than 25m/s, and manufacturing a coated steel wire with the thickness of 0.1-0.3 mm, wherein the thickness of the coating is 0.01-0.1 time of that of the raw steel wire; fifthly, twisting the steel cord by a twisting machine and externally winding the steel cord.
4. A steel cord drawing process effective in reducing center burst as claimed in claim 2, wherein: the content of chromium element in the selected raw material plate is 0.002-0.45%, and the content of titanium element is 0.005-0.1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010415904.6A CN111558624A (en) | 2020-05-16 | 2020-05-16 | Steel cord capable of effectively reducing central burst and wire drawing processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010415904.6A CN111558624A (en) | 2020-05-16 | 2020-05-16 | Steel cord capable of effectively reducing central burst and wire drawing processing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111558624A true CN111558624A (en) | 2020-08-21 |
Family
ID=72071138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010415904.6A Pending CN111558624A (en) | 2020-05-16 | 2020-05-16 | Steel cord capable of effectively reducing central burst and wire drawing processing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111558624A (en) |
-
2020
- 2020-05-16 CN CN202010415904.6A patent/CN111558624A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200821 |
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| WD01 | Invention patent application deemed withdrawn after publication |