WO2014166673A1 - Câble en acier plat doté d'un cœur en zinc ou en alliage de zinc - Google Patents

Câble en acier plat doté d'un cœur en zinc ou en alliage de zinc Download PDF

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Publication number
WO2014166673A1
WO2014166673A1 PCT/EP2014/053944 EP2014053944W WO2014166673A1 WO 2014166673 A1 WO2014166673 A1 WO 2014166673A1 EP 2014053944 W EP2014053944 W EP 2014053944W WO 2014166673 A1 WO2014166673 A1 WO 2014166673A1
Authority
WO
WIPO (PCT)
Prior art keywords
steel cord
zinc
section
steel
cord
Prior art date
Application number
PCT/EP2014/053944
Other languages
English (en)
Inventor
Stijn Himpe
Hongzhen Zhu
Original Assignee
Nv Bekaert Sa
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nv Bekaert Sa filed Critical Nv Bekaert Sa
Publication of WO2014166673A1 publication Critical patent/WO2014166673A1/fr

Links

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
    • D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
    • 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
    • D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
    • D07B1/0626—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration the reinforcing cords consisting of three core wires or filaments and at least one layer of outer wires or filaments, i.e. a 3+N configuration
    • 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
    • D07B1/0646—Reinforcing cords for rubber or plastic articles comprising longitudinally preformed wires
    • 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
    • D07B1/066—Reinforcing cords for rubber or plastic articles the wires being made from special alloy or special steel composition
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/2002—Wires or filaments characterised by their cross-sectional shape
    • D07B2201/2005—Wires or filaments characterised by their cross-sectional shape oval
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2016—Strands characterised by their cross-sectional shape
    • D07B2201/2018—Strands characterised by their cross-sectional shape oval
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2019—Strands pressed to shape
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2023—Strands with core
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D07B2201/2061—Cores characterised by their structure comprising wires resulting in a twisted structure
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2066—Cores characterised by the materials used
    • 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
    • D07B2205/3046—Steel characterised by the carbon content
    • D07B2205/3053—Steel characterised by the carbon content having a medium carbon content, e.g. greater than 0,5 percent and lower than 0.8 percent respectively HT wires
    • 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
    • D07B2205/3071—Zinc (Zn)
    • 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
    • D07B2205/3085—Alloys, i.e. non ferrous
    • D07B2205/3092—Zinc (Zn) and tin (Sn) alloys
    • 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
    • D07B2401/202—Environmental resistance
    • D07B2401/2025—Environmental resistance avoiding corrosion
    • 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
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/025—Preforming the wires or strands prior to closing

Definitions

  • the invention relates to a steel cord with a flat cross section used for
  • a steel cord with a flat cross section comprising a core and an outer layer has an advantage on stiffness than the steel cord with the round cross section. There will be different stiffness in the different direction of the flat steel cord, and this feature will lead to a good handling, riding comfort or driving stability when such flat steel cord is used for reinforcing rubber tyre. In a direction perpendicular to the major axis of the flat steel cord, i.e.
  • the flat core wire will have a mechanical property loss, e.g. loss of fatigue resistance and less tensile strength, during the manufacturing.
  • Prior art JP09-268485A provides another way for producing a steel cord with oval cross section, wherein round steel wires are arranged along an ellipse.
  • the drawbacks are that the ply reinforced by such steel cord is still very thick, the manufacturing process of this steel cord is not very easy to operate, and the producing cost is very high.
  • a steel cord for reinforcing rubber products has a flat cross section with a structure of m+n, wherein n outer layer wires are twisted around m core wires, and at least one of the m core wires is a zinc wire.
  • the flat cross section of the steel cord has a major axis and a minor axis, and the ratio R between the width of the steel cord along the major axis and the height of the steel cord along the minor axis may range from 1.05 to 2.50, and preferably from 1.10 to 1.80.
  • the width of the steel cord along the major axis may range from 0.2mm to 2.5mm, and preferably from 0.3 to 1.5mm.
  • the m may range from 1 to 6, while the n may range from 3 to 15.
  • the at least one zinc core wire may be deformed in elongated or flat cross section.
  • manufacturing a steel cord with flat cross section comprises the step (a) twisting m core wires, including at least one zinc core wire, and n outer layer wires together into a steel cord with approximate round cross section, and (b) flattening the steel cord with approximate round cross section into flat cross section by pressing or rolling.
  • Figure 1 schematically illustrates a magnified cross sectional view of a
  • steel cord with flat cross section and at least one zinc core wire.
  • Figure 2 schematically illustrates a device to make a steel cord
  • Figure 1 schematically illustrates a magnified cross sectional view of a steel cord with flat cross section and at least one zinc core wire.
  • the steel cord 10 has a flat cross section with a structure of 1 +6, where in six outer layer wires 14 are twisted around one core wire 12, and the one core wire 12 is a zinc wire.
  • the zinc wire 12 may be made of pure zinc or zinc alloy.
  • the zinc alloy may be binary alloy compositions, for example, Zn-Ni, Zn- Fe, Zn-Mn, Zn-AI, and Zn-Mg.
  • the zinc alloy may also be ternary alloy compositions, for example, Zn-Fe-AI, and Zn-AI-Mg.
  • the flat cross section of steel cord 10 has a major axis and minor axis, and the ratio R between the width W of the steel cord along the major axis and the height H of the steel cord along the minor axis many range from 1 .05 to 2.50, preferably from 1 .10 to 1 .80.
  • the major axis means the longest line between the surfaces of outer layer wires, while the minor axis is perpendicular to the major axis.
  • the manufacturing process for a steel cord 10 with flat cross section comprises following steps. Firstly twisting one zinc core wire 12, and six outer layer wires 14 together into a steel cord with approximate round cross section, and then flattening the steel cord with approximate round cross section into flat cross section by pressing or rolling. Since the steel cord is flattened by pressing or rolling and zinc is comparatively soft material to deform under pressure, the zinc core wire 12 is deformed in elongated or flat cross section. Comparatively, rolling is a more favorable process than pressing to flattening the steel cord. In the rolling process, the rollers rotate in the same direction and at the same speed of movement of the steel cord. There is no slippage between the rollers and the steel cord and the rolling process is continuous. On the contrary, in the pressing process, either there is a slippage between the tools and the steel cord to cause damages on the surface of the steel cord or the steel cord can be fed in step movement with a complex process.
  • FIG. 2 schematically illustrates a conventional way of manufacturing a steel cord with approximate round cross section comprising at least one zinc core wire.
  • the 1 +6 steel cord 10 has one zinc core wire 12 and six outer layer wires 14.
  • the manufacturing is carried out by means of a well- known tubular stranding or twisting machine 18, sometimes referred to as a "cabling machine".
  • the core wire 12 is unwound from a supply spool 16.
  • the core wire 12 is passed to the tubular stranding machine 18 where the core wire 12 is guided on the cylindrical surface (guiding elements not shown).
  • the cylindrical main body of the tubular stranding machine 18 comprises six stationary supply spools 20 where the outer layer wires 14 are unwound. These outer layer wires 14 are also guided via the cylindrical surface of the stranding machine 14.
  • the outer layer wires 14 are laid around the core wire 12 at the cord forming die 24 in order to form the 1 +6 steel cord 10.
  • the outer layer wires 14 can be plastically deformed by a pre-forming device 22, and the pre-forming device 22 can plastically deform the outer layer wires 14 by bending.
  • the plastically deformed outer layer wires 14 can make spaces between the outer layers wires 14 of the cord 10 to allow rubber penetration.
  • a tubular stranding machine 18 does not subject the individual wires 12, 14 to a rotation around their own axes, which is suitable for core wire 14 made of zinc or zinc alloy.
  • a steel cord according to present invention may have following
  • a zinc core wire is soft to deform under pressure, and it is easier to flatten the steel cord comprising a zinc core wire by pressing or rolling. Therefore, the manufacturing process is very easier and requires less force.
  • a zinc core wire is soft to deform under pressure, outer layer wires may impress on the surface of the zinc core wire, and the impress may help the steel cord to maintain the flat geometry after pressing or rolling. Therefore, the profile of the flat steel cord is more stable.
  • zinc is a metal higher in the electro-potential series than steel, and zinc core wire can provide cathodic protection to other steel wires, e.g. zinc core wire scarifies itself and improves the corrosion resistance of other steel wires in the steel cord.
  • Prior art 0.30+6x0.26 HT is a steel cord comprising one steel core wire with diameter of 0.30mm and six steel outer layer wire with diameter of 0.26mm, wherein the wires are high tensile steel wire.
  • Present invention 0.30(Zinc)+6x0.26 is a flattened steel cord comprising one zinc core wire with diameter of 0.30mm and six steel outer layer wires with diameter of 0.26mm, wherein the outer layer steel wires can be high tensile steel wire, super tensile steel wire, or ultra-tensile steel wire.
  • Prior art 0.30+6x0.26 HT cord has a round cross-section with a diameter of 0.82mm, while the flattened present invention cord 0.30(zinc)+6x0.26 has a flat cross section with width 1.25mm and height 0.58mm.
  • the height of the flattened present invention cord is 30% lower than the diameter of the prior art cord, and accordingly the height of belt ply reinforced by the flat present invention cord is lower than that of prior art cord. Therefore, rubber can be saved and weight of tire can be reduced because of the thinner belt ply.
  • the breaking load of present invention is lower than that of comparable prior art cord.
  • the breaking load of present invention 0.30(zinc)+6x0.26 HT cord is 985 newton, while the breaking load of prior art 0.30+6x0.26 HT cord is 1240 newton.
  • present invention cord can use ST or UT steel wire. Accordingly, the breaking load of present invention
  • present invention substantially improves the corrosion resistance ability.
  • the lifetime of corrosion test on present invention cord is about twenty times that of prior art cord.
  • the zinc core wire scarifies itself and drastically improves the corrosion resistance of other steel wires in the steel cord.
  • a typical steel composition of the steel wire for rubber reinforcement has a minimum carbon content of 0.65%, a manganese content ranging from
  • a typical steel composition for high-tensile steel cord has a minimum carbon content of around 0.80 weight %, e.g. 0.78 - 0.82 weight %.
  • the steel wires are manufactured according to following steps from a steel rod with above composition.
  • the wire rod is firstly cleaned by mechanical descaling and / or by chemical pickling in a H 2 SO 4 or HCI solution in order to remove the oxides present on the surface.
  • the wire rod is then rinsed in water and is dried.
  • the dried wire rod is then subjected to a first series of dry drawing operations in order to reduce the diameter until a first intermediate diameter.
  • Patenting means first austenizing until a temperature of about 1000 °C followed by a transformation phase from austenite to pearlite at a temperature of about 600 - 650 °C. The steel wire is then ready for further mechanical deformation.
  • the steel wire is further dry drawn from the first intermediate diameter di until a second intermediate diameter d 2 in a second number of diameter reduction steps.
  • the second diameter 02 typically ranges from 1 .0 mm to 2.5 mm.
  • the steel wire is subjected to a second patenting treatment, i.e. austenizing again at a temperature of about 1000 °C and thereafter quenching at a temperature of 600 to 650 °C to allow for transformation to pearlite.
  • a second patenting treatment i.e. austenizing again at a temperature of about 1000 °C and thereafter quenching at a temperature of 600 to 650 °C to allow for transformation to pearlite.
  • the steel wire is usually provided with a brass coating: copper is plated on the steel wire and zinc is plated on the copper. A thermo-diffusion treatment is applied to form the brass coating.
  • the brass-coated steel wire is then subjected to a final series of cross- section reductions by means of wet drawing machines.
  • the final product is a steel wire with carbon content above 0.60 per cent by weight, with a tensile strength typically above 2000 MPa and adapted for the
  • Steel wires adapted for rubber reinforcement typically have a final diameter ranging from 0.05 mm to 0.60 mm, e.g. from 0.10 mm to 0.40 mm.
  • Examples of wire diameters are 0.10 mm, 0.12 mm, 0.15 mm, 0.175 mm, 0.18 mm, 0.20 mm, 0.22 mm, 0.245 mm, 0.28 mm, 0.30 mm, 0.32 mm, 0.35 mm, 0.38 mm, 0.40 mm.
  • the possible m+n construction can be.
  • m 3 the steel cord has one, two or three zinc core wire.

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  • Ropes Or Cables (AREA)

Abstract

L'invention porte sur un câble en acier (10) pour renforcer un produit en caoutchouc, lequel câble en acier (10) comporte une section transversale plate, et au moins l'un des fils de cœur (12) est en zinc. Le câble en acier plat (10) avec un fil de cœur en zinc (12) est fabriqué par pressage ou laminage d'un câble en acier (10) avec une section transversale approximativement ronde en une section transversale plate. En plus des avantages d'un câble en acier plat, la présente invention procure un processus de fabrication simple, une géométrie stable du câble en acier, et une protection cathodique pour le câble en acier, de façon à améliorer la résistance à la corrosion.
PCT/EP2014/053944 2013-04-10 2014-02-28 Câble en acier plat doté d'un cœur en zinc ou en alliage de zinc WO2014166673A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13163086.5 2013-04-10
EP13163086 2013-04-10

Publications (1)

Publication Number Publication Date
WO2014166673A1 true WO2014166673A1 (fr) 2014-10-16

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109610212A (zh) * 2018-12-03 2019-04-12 江苏兴达钢帘线股份有限公司 一种具有特殊结构的钢丝绳及其生产工艺
WO2020113604A1 (fr) * 2018-12-03 2020-06-11 江苏兴达钢帘线股份有限公司 Câble en fil d'acier ayant une stabilité structurelle élevée et son procédé de préparation
WO2021008853A1 (fr) * 2019-07-17 2021-01-21 Nv Bekaert Sa Câble en acier destiné au renforcement de caoutchouc
CN112566790A (zh) * 2018-08-16 2021-03-26 大陆轮胎德国有限公司 用于车辆的充气轮胎
WO2022135850A1 (fr) * 2020-12-21 2022-06-30 Nv Bekaert Sa Câble d'acier pour renforcement de caoutchouc

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1510170A1 (de) * 1965-01-28 1970-07-23 Westfaelische Drahtindustrie Flachlitzenseil
US6622766B1 (en) * 2002-06-07 2003-09-23 The Goodyear Tire & Rubber Company Light weight cable bead core
DE102008035168A1 (de) * 2008-07-28 2010-02-04 Continental Reifen Deutschland Gmbh Fahrzeugreifen
US20120177940A1 (en) * 2009-09-11 2012-07-12 Nv Bekaert Sa Oval steel cord with oval wires

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1510170A1 (de) * 1965-01-28 1970-07-23 Westfaelische Drahtindustrie Flachlitzenseil
US6622766B1 (en) * 2002-06-07 2003-09-23 The Goodyear Tire & Rubber Company Light weight cable bead core
DE102008035168A1 (de) * 2008-07-28 2010-02-04 Continental Reifen Deutschland Gmbh Fahrzeugreifen
US20120177940A1 (en) * 2009-09-11 2012-07-12 Nv Bekaert Sa Oval steel cord with oval wires

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "High tensile strength steel cord constructions for tyres", RESEARCH DISCLOSURE, MASON PUBLICATIONS, HAMPSHIRE, GB, vol. 340, no. 54, 1 August 1992 (1992-08-01), XP007118007, ISSN: 0374-4353 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112566790A (zh) * 2018-08-16 2021-03-26 大陆轮胎德国有限公司 用于车辆的充气轮胎
CN109610212A (zh) * 2018-12-03 2019-04-12 江苏兴达钢帘线股份有限公司 一种具有特殊结构的钢丝绳及其生产工艺
WO2020113612A1 (fr) * 2018-12-03 2020-06-11 江苏兴达钢帘线股份有限公司 Fil d'acier comportant des structures spéciales et son procédé de fabrication
WO2020113604A1 (fr) * 2018-12-03 2020-06-11 江苏兴达钢帘线股份有限公司 Câble en fil d'acier ayant une stabilité structurelle élevée et son procédé de préparation
WO2021008853A1 (fr) * 2019-07-17 2021-01-21 Nv Bekaert Sa Câble en acier destiné au renforcement de caoutchouc
WO2022135850A1 (fr) * 2020-12-21 2022-06-30 Nv Bekaert Sa Câble d'acier pour renforcement de caoutchouc

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