CN114015946B - High-strength corrosion-resistant stainless steel coated steel wire for bridge cable and preparation method thereof - Google Patents
High-strength corrosion-resistant stainless steel coated steel wire for bridge cable and preparation method thereof Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 132
- 239000010959 steel Substances 0.000 title claims abstract description 132
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 104
- 230000007797 corrosion Effects 0.000 title claims abstract description 72
- 238000005260 corrosion Methods 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims description 9
- 239000002131 composite material Substances 0.000 claims abstract description 35
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- 238000010622 cold drawing Methods 0.000 claims description 17
- 238000005098 hot rolling Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
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- 238000003466 welding Methods 0.000 claims description 8
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- 238000004140 cleaning Methods 0.000 claims description 5
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- 238000005554 pickling Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 7
- 239000008397 galvanized steel Substances 0.000 description 7
- 239000000725 suspension Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 3
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- 238000010301 surface-oxidation reaction Methods 0.000 description 2
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- 229910000922 High-strength low-alloy steel Inorganic materials 0.000 description 1
- 241000282376 Panthera tigris Species 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- 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
- B21C37/042—Manufacture of coated wire or bars
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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Abstract
The invention provides a high-strength corrosion-resistant stainless steel coated steel wire for a bridge cable, which comprises a stainless steel corrosion-resistant outer layer, a high-strength steel core and a metallurgical bonding transition layer, wherein the stainless steel corrosion-resistant outer layer and the high-strength steel core are assembled and then hot-rolled to form the metallurgical bonding transition layer on the contact surface of the stainless steel corrosion-resistant outer layer and the high-strength steel core; the diameter of the high-strength corrosion-resistant stainless steel coated steel wire for the bridge cable is 3-7mm, the thickness of the corrosion-resistant outer layer of the stainless steel is 1-8% of the diameter of the composite steel wire, and the thickness of the metallurgical bonding transition layer is 0.02-0.10 mm; the high-strength steel core is made of alloy steel and comprises the following components in percentage by weight: 0.8-0.95% of C, si:0.8 to 1.3%, mn:0.6-0.9%, cr:0.2-0.4%, mo:0.05-0.2%, ni:0.1-0.3%, ti:0.02-0.08%, V:0.03-0.08%, al:0.02-0.06%, and the balance of Fe and inevitable impurities. The high-strength corrosion-resistant stainless steel clad steel wire for the cable of the high and large bridge, provided by the invention, has the characteristics of high strength, corrosion resistance, excellent performance and stable performance.
Description
Technical Field
The invention relates to the technical field of cable wires, in particular to a high-strength corrosion-resistant stainless steel coated wire for a bridge cable and a preparation method thereof.
Background
With the development of the preferred bridge type of the large-span bridge, such as a cable-stayed bridge, a suspension bridge and other cable-supported bridges, higher performance requirements are provided for the key raw material, namely the high-strength steel wire, for the bridge cable, the corrosion-resistant steel wire for the new generation of ultra-high-strength bridge cable is researched to save the material consumption, reduce the production cost, prolong the corrosion-resistant service life of the steel wire, adapt to the construction requirements of the large-span bridge, and become one of the key points concerned by people. At present, galvanized steel wires with the strength levels of phi 5.0mm series 1870MPa and l960MPa are commonly used for main cable strands of suspension bridges at home and abroad, a galvanized steel wire with the strength level of phi 5.25mm 1860MPa is adopted for a Korean plum shun bridge main cable built in 2013, and a galvanized steel wire with the strength level of phi 5.35mm 1960MPa is adopted for a Korean Weishan bridge design built in 2015; the Dongting lake secondary bridge built in 2018 is designed by using phi 5.25mm 1860PMa galvanized steel wires, and the tiger door secondary bridge built in 2019 is designed by using phi 5.0mm 1960MPa galvanized steel wires.
However, a plurality of scholars at home and abroad research the corrosion and candling condition of the galvanized steel wire rope for the suspension bridge cable rope under different in-rope environments. The results show that the steel wire ends and anchors are more susceptible to corrosion, while the middle portion is less corrosive. Zinc plated steel wire will not generate rotten candle when the relative humidity is less than 60%, but it is very easy to rot candle when the relative humidity is higher. In addition, under the condition of a large amount of salt and high temperature, the steel wire can generate remarkable corrosion. With the increase of service life, the galvanized steel wire gradually exposes the problems of corrosion prevention layer aging, corrosion, wire breakage and the like, and the cable can be seriously broken, so that the bridge collapse accident is caused.
Therefore, it is necessary to develop and produce high-strength steel wires with higher corrosion resistance so as to meet the long-life requirement of cable-supported bridges such as cable-stayed bridges and suspension bridges.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-strength corrosion-resistant stainless steel coated steel wire for a bridge cable, which has the characteristics of high strength, excellent corrosion resistance and stable performance.
In order to solve the problems, the technical scheme of the invention is as follows:
a high-strength corrosion-resistant stainless steel clad steel wire for a bridge cable is formed by a stainless steel corrosion-resistant outer layer and a high-strength steel core through a hot rolling and cold drawing process after being assembled, and comprises the stainless steel corrosion-resistant outer layer, the high-strength steel core and a metallurgical bonding transition layer, wherein the stainless steel corrosion-resistant outer layer is coated on the periphery of the high-strength steel core, and the stainless steel corrosion-resistant outer layer and the high-strength steel core are assembled and then hot rolled to form the metallurgical bonding transition layer on the contact surface of the stainless steel corrosion-resistant outer layer and the high-strength steel core;
the diameter of the high-strength corrosion-resistant stainless steel coated steel wire for the bridge cable is 3-7mm, the thickness of the corrosion-resistant outer layer of the stainless steel is 1-8% of the radius of the high-strength corrosion-resistant stainless steel coated steel wire for the bridge cable, and the thickness of the metallurgical bonding transition layer is 0.02mm-0.10mm;
the high-strength steel core is made of alloy steel and comprises the following components in percentage by weight:
0.8-0.95% of C, si:0.8 to 1.3%, mn:0.6-0.9%, cr:0.2-0.4%, mo:0.05-0.2%, ni:0.1-0.3%, ti:0.02-0.08%, V:0.03-0.08%, al:0.02-0.06%, and the balance of Fe and inevitable impurities.
Furthermore, the corrosion-resistant outer layer of stainless steel is made of 2205, 2304, 2507 and 316L materials.
Furthermore, the high-strength steel core adopts a round billet with the diameter not less than 300mm or a square billet with the length and width not less than 300mm, the round billet with the diameter of 160mm is firstly hot-rolled, and then the surface treatment is carried out on the round billet with the high-strength steel core, and the round billet with the high-strength steel core and the stainless steel pipe are subjected to composite assembly to form the stainless steel composite billet.
The invention also provides a preparation method of the high-strength corrosion-resistant stainless steel coated steel wire for the bridge cable, which comprises the following steps:
step S1, rolling a steel billet into a round billet to form a high-strength steel core, wherein the rolling deformation is more than or equal to 45%; wherein the high-strength steel core comprises the following components in percentage by weight:
0.8-0.95% of C, si:0.8 to 1.3%, mn:0.6-0.9%, cr:0.2-0.4%, mo:0.05-0.2%, ni:0.1-0.3%, ti:0.02-0.08%, V:0.03-0.08%, al:0.02-0.06%, and the balance of Fe and inevitable impurities;
s2, manufacturing a stainless steel pipe according to a preset size to serve as a stainless steel corrosion-resistant outer layer, and performing cleaning treatment for removing impurities and dirt on the inner surface of the stainless steel pipe and the outer surface of the high-strength steel core; then assembling the stainless steel pipe and the high-strength steel core to obtain a stainless steel-high-strength steel composite billet;
s3, putting the assembled stainless steel-high-strength steel composite billet into vacuum packaging equipment, starting the equipment for vacuumizing, removing air between the stainless steel corrosion-resistant outer layer and the high-strength steel core to enable the vacuum degree to be more than or equal to 10Pa, and welding and sealing the tail end of the stainless steel-high-strength steel composite billet in the vacuum packaging equipment;
s4, heating the welded and sealed stainless steel-high-strength steel composite billet to 1050-1200 ℃ in a heating furnace for 2-3 hours to ensure that the internal and external temperatures of the stainless steel-high-strength steel composite billet are uniform;
step S5, discharging the heated stainless steel-high-strength steel composite billet out of the furnace, then carrying out hot rolling on a hot continuous rolling mill, controlling the initial rolling temperature to be 1000-1150 ℃, carrying out multi-pass hot rolling, then rolling the composite billet into a stainless steel clad wire rod with the diameter of 6-18 mm, and controlling the final rolling temperature to be 800-950 ℃;
step S6, carrying out multi-pass cold drawing on the stainless steel coating hot-rolled wire rod to obtain a stainless steel coating steel wire with the diameter of 3-7mm through cold drawing, and tempering the steel wire at the tempering temperature of 200-400 ℃ for 24-48 h; in the cold drawing process, the deformation of each pass is 5-15%, and the cold drawing speed is 15-50m/min;
the formed stainless steel clad steel wire comprises a stainless steel corrosion-resistant outer layer, a high-strength steel core and a metallurgical bonding transition layer, wherein the stainless steel corrosion-resistant outer layer is coated on the periphery of the high-strength steel core, and the stainless steel corrosion-resistant outer layer and the high-strength steel core are assembled and then are subjected to hot rolling to form a contact surface of the stainless steel corrosion-resistant outer layer and the high-strength steel core into the metallurgical bonding transition layer;
the thickness of the stainless steel corrosion-resistant outer layer is 0.05mm-1.0mm, the thickness of the stainless steel corrosion-resistant outer layer is 1% -8% of the diameter of the composite steel wire, and the thickness of the metallurgical bonding transition layer is 0.02mm-0.10mm.
Further, before the cold drawing process, the stainless steel clad wire rod is subjected to acid cleaning to remove surface oxide skin, and then is subjected to surface phosphating treatment.
Furthermore, the stainless steel corrosion-resistant outer layer is made of 2205, 2304, 2507 and 316L materials.
Further, the high-strength steel core is formed by hot rolling a round billet with the diameter not less than 300mm or a square billet with the length and width not less than 300mm into a round billet with the diameter of 160 mm.
Compared with the prior art, the high-strength corrosion-resistant stainless steel coated steel wire for the bridge cable and the preparation method thereof have the beneficial effects that:
the high-strength corrosion-resistant stainless steel coated steel wire for the bridge cable, provided by the invention, has the characteristics of high strength, excellent corrosion resistance and stable performance, and is particularly suitable for preparing cable-bearing bridge cables such as cable-stayed bridges, suspension bridges and the like, wherein the outer layer of the high-strength stainless steel coated steel wire is made of high-strength stainless steel, and the core of the high-strength low-alloy steel core is made of high-strength steel core.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a high-strength corrosion-resistant stainless steel coated steel wire for a bridge cable according to the present invention.
Detailed Description
The following description of the present invention is provided to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and to make the above objects, features and advantages of the present invention more comprehensible.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and these ranges or values should be understood to encompass values close to these ranges or values. For numerical ranges, combinations of values between the endpoints of each of the ranges, between the endpoints of each of the ranges and individual values, and between individual values can result in one or more new numerical ranges, and such numerical ranges should be considered as being specifically disclosed herein.
Example 1
In this embodiment, a stainless steel coated steel wire with a diameter of 7.0mm is prepared by the following specific preparation process:
step S1, rolling a steel billet into a round billet to form a high-strength steel core, wherein the rolling deformation is more than or equal to 45%; wherein the high-strength steel core comprises the following components in percentage by weight:
0.88% of C, si:0.85%, mn:0.65%, cr:0.2%, mo:0.2%, ni:0.3%, ti:0.08%, V:0.03%, al:0.06%, and the balance of Fe and inevitable impurities;
by adding proper Ti, V and Al into the alloy, the crystal grains of the hot-rolled wire rod can be refined, and the strength and the plasticity of the hot-rolled wire rod are improved; the appropriate Ni can effectively improve the toughness of the wire rod matrix and improve the drawing performance of the wire rod; appropriate Mo can improve the tempering stability of the steel wire and simultaneously improve the strength of the steel wire.
Heating the alloy 350 x 400mm continuous casting billet of the materials to 1050 ℃, then hot-rolling the alloy into a round billet with the diameter of 160mm to form a high-strength steel core, removing the defects of surface oxidation, slag inclusion and the like of the billet by adopting a turning method, and processing the billet to a proper size;
s2, manufacturing a stainless steel pipe according to a preset size to serve as a stainless steel corrosion-resistant outer layer, and performing cleaning treatment for removing impurities and dirt on the inner surface of the stainless steel pipe and the outer surface of the high-strength steel core; then assembling the stainless steel pipe and the high-strength steel core to obtain a stainless steel-high-strength steel composite billet;
specifically, 2205 stainless steel is selected as an outer layer, and an oxide layer, impurities and oil stains on the inner wall of a 2205 stainless steel pipe with the inner diameter phi of 159mm are removed by acid washing; sleeving the high-strength steel core billet in the step S1 into a 2205 stainless steel tube by adopting a hydraulic device;
s3, putting the assembled stainless steel-high-strength steel composite billet into vacuum packaging equipment, starting the equipment for vacuumizing, removing air between the stainless steel corrosion-resistant outer layer and the high-strength steel core to enable the vacuum degree to be more than or equal to 10Pa, and welding and sealing the tail end of the stainless steel-high-strength steel composite billet in the vacuum packaging equipment;
specifically, a plasma or electron beam welding machine is used for welding and packaging two ends of the steel billet after vacuumizing.
S4, heating the welded and sealed stainless steel-high-strength steel composite billet to 1180 ℃ in a heating furnace for 2-3 hours to ensure that the inside and outside temperatures of the stainless steel-high-strength steel composite billet are uniform;
step S5, discharging the heated stainless steel-high-strength steel composite billet out of the furnace, then carrying out hot rolling on a hot continuous rolling mill, controlling the initial rolling temperature to be 1100 ℃, carrying out multi-pass hot rolling, then rolling the composite billet into a stainless steel cladding wire rod with the diameter of phi 14mm, and controlling the final rolling temperature to be 850 ℃;
pickling the hot rolled wire rod to remove oxide skin on the surface, and then carrying out surface phosphating treatment;
step S6, carrying out 9-pass cold drawing on the stainless steel coating hot-rolled wire rod to obtain a stainless steel coating steel wire with the diameter of 7mm, carrying out tempering treatment on the steel wire, wherein the tempering temperature is 270 ℃, and carrying out heat preservation for 36h; in the cold drawing process, the deformation of each pass is 5-15%, and the cold drawing speed is 25m/min.
Fig. 1 is a schematic structural diagram of a high-strength corrosion-resistant stainless steel coated steel wire for a bridge cable according to the present invention. The high-strength corrosion-resistant stainless steel clad steel wire prepared by the embodiment comprises a stainless steel corrosion-resistant outer layer 1, a high-strength steel core 2 and a metallurgical bonding transition layer 3, wherein the stainless steel corrosion-resistant outer layer 1 is coated on the periphery of the high-strength steel core 2, and the stainless steel corrosion-resistant outer layer 1 and the high-strength steel core 2 are assembled and then hot-rolled to form the metallurgical bonding transition layer 3 on the contact surface;
in this embodiment, the diameter of the stainless steel coated steel wire is 7mm, wherein the thickness of the stainless steel corrosion-resistant outer layer is 0.175mm, the thickness of the stainless steel corrosion-resistant outer layer is 2.5% of the diameter of the composite steel wire, and the thickness of the metallurgical bonding transition layer is 0.05mm.
Example 2
In this embodiment, a stainless steel coated steel wire with a diameter of 5.0mm is prepared by the following specific preparation process:
step S1, rolling a steel billet into a round billet to form a high-strength steel core, wherein the rolling deformation is more than or equal to 45%; wherein the high-strength steel core comprises the following components in percentage by weight:
0.95% of C, si:1.1%, mn:0.85%, cr:0.3%, mo:0.15%, ni:0.3%, ti:0.08%, V:0.08%, al:0.05%, the balance being Fe and unavoidable impurities;
heating an alloy phi 320mm continuous casting blank of the material to 1050 ℃, then hot-rolling the alloy phi 320mm continuous casting blank into a phi 160mm round blank to form a high-strength steel core, and then removing defects such as surface oxidation, slag inclusion and the like of the steel blank by adopting a turning method and processing the steel blank to a proper size;
s2, manufacturing a stainless steel pipe according to a preset size to serve as a stainless steel corrosion-resistant outer layer, and performing cleaning treatment for removing impurities and dirt on the inner surface of the stainless steel pipe and the outer surface of the high-strength steel core; then assembling the stainless steel pipe and the high-strength steel core to obtain a stainless steel-high-strength steel composite billet;
specifically, 2304 stainless steel is selected as an outer layer, and an oxidation layer, impurities and oil stains on the inner wall of a 2304 stainless steel pipe with the inner diameter of phi 159mm are removed by acid washing; sleeving the high-strength steel core billet in the step S1 into a 2205 stainless steel pipe by adopting a hydraulic device;
s3, placing the assembled stainless steel-high-strength steel composite billet into vacuum packaging equipment, starting the equipment for vacuumizing, removing air between the stainless steel corrosion-resistant outer layer and the high-strength steel core to enable the vacuum degree to be more than or equal to 10Pa, and welding and sealing the tail end of the stainless steel-high-strength steel composite billet in the vacuum packaging equipment;
specifically, welding and packaging two ends of the vacuumized steel billet by using a plasma or electron beam welding machine.
S4, heating the welded and sealed stainless steel-high-strength steel composite billet to 1200 ℃ in a heating furnace for 2 hours to ensure that the internal and external temperatures of the stainless steel-high-strength steel composite billet are uniform;
s5, discharging the heated stainless steel-high-strength steel composite billet out of a furnace, then carrying out hot rolling on a hot continuous rolling mill, controlling the initial rolling temperature to be 1150 ℃, carrying out multi-pass hot rolling, then rolling the composite billet into a stainless steel clad wire rod with the diameter of phi 12mm, and controlling the final rolling temperature to be 880 ℃;
pickling the hot rolled wire rod to remove oxide skin on the surface, and then carrying out surface phosphating treatment;
step S6, carrying out cold drawing on the stainless steel coating hot-rolled wire rod by 10 times of cold drawing process to obtain a stainless steel coating steel wire with the diameter of phi 5mm, tempering the steel wire at the tempering temperature of 270 ℃, and carrying out heat preservation for 36 hours; in the cold drawing process, the deformation of each pass is 5-15%, and the cold drawing speed is 50m/min.
The structure of the high-strength corrosion-resistant stainless steel clad steel wire prepared in the embodiment is basically the same as that of the embodiment 1, in the embodiment, the diameter of the stainless steel clad steel wire is 5mm, the thickness of a stainless steel corrosion-resistant outer layer is 0.2mm, the thickness of the stainless steel corrosion-resistant outer layer is 4% of the diameter of the composite steel wire, and the thickness of the metallurgical bonding transition layer is 0.03mm.
Mechanical property tests are carried out on the high-strength corrosion-resistant stainless steel coated steel wire samples prepared in the embodiments 1 and 2, and the test results are shown in the table 1:
table 1: mechanical property test result of high-strength corrosion-resistant stainless steel coated steel wire sample
The high-strength corrosion-resistant stainless steel clad steel wire for the bridge cable, provided by the invention, has the characteristics of high strength, excellent corrosion resistance and stable performance, and is particularly suitable for preparing cable-supported bridge cables such as cable-stayed bridges, suspension bridges and the like.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and these embodiments are therefore considered to be within the scope of the invention.
Claims (2)
1. A preparation method of a high-strength corrosion-resistant stainless steel coated steel wire for a bridge cable is characterized by comprising the following steps:
step S1, rolling a steel billet into a round billet to form a high-strength steel core, wherein the rolling deformation is more than or equal to 45%; wherein the high-strength steel core comprises the following components in percentage by weight:
0.8-0.95% of C, si:0.8 to 1.3%, mn:0.6-0.9%, cr:0.2-0.4%, mo:0.05-0.2%, ni:0.1-0.3%, ti:0.02-0.08%, V:0.03-0.08%, al:0.02-0.06%, and the balance of Fe and inevitable impurities;
wherein, the high-strength steel core is formed by hot rolling a round billet with the diameter not less than 300mm or a square billet with the length and width not less than 300mm into a round billet with the diameter of 160 mm;
s2, manufacturing a stainless steel pipe according to a preset size to serve as a stainless steel corrosion-resistant outer layer, and performing cleaning treatment for removing impurities and dirt on the inner surface of the stainless steel pipe and the outer surface of the high-strength steel core; then assembling the stainless steel pipe and the high-strength steel core to obtain a stainless steel-high-strength steel composite billet;
the stainless steel corrosion-resistant outer layer is made of 2205, 2304, 2507 and 316L materials;
s3, putting the assembled stainless steel-high-strength steel composite billet into vacuum packaging equipment, starting the equipment for vacuumizing, removing air between the stainless steel corrosion-resistant outer layer and the high-strength steel core to enable the vacuum degree to be more than or equal to 10Pa, and welding and sealing the tail end of the stainless steel-high-strength steel composite billet in the vacuum packaging equipment;
s4, heating the welded and sealed stainless steel-high-strength steel composite billet in a heating furnace to 1050-1200 ℃ for 2-3 hours to ensure that the internal and external temperatures of the stainless steel-high-strength steel composite billet are uniform;
step S5, discharging the heated stainless steel-high-strength steel composite billet out of a furnace, then carrying out hot rolling on a hot continuous rolling mill, controlling the initial rolling temperature to be 1000-1150 ℃, carrying out multi-pass hot rolling, then rolling the composite billet into a stainless steel clad wire rod with phi 6-18mm, and controlling the final rolling temperature to be 800-950 ℃;
pickling a stainless steel coating wire rod to remove surface oxide skin, and then carrying out surface phosphating treatment;
step S6, carrying out multi-pass cold drawing on the stainless steel coating hot-rolled wire rod to obtain a stainless steel coating steel wire with phi 3-7mm through cold drawing, and carrying out tempering treatment on the steel wire, wherein the tempering temperature is 200-400 ℃, and the heat preservation is carried out for 24-48h; in the cold drawing process, the deformation of each pass is 5-15%, and the cold drawing speed is 15-50m/min;
the formed stainless steel clad steel wire comprises a stainless steel corrosion-resistant outer layer, a high-strength steel core and a metallurgical bonding transition layer, wherein the stainless steel corrosion-resistant outer layer is coated on the periphery of the high-strength steel core, and the stainless steel corrosion-resistant outer layer and the high-strength steel core are assembled and then are subjected to hot rolling to form the metallurgical bonding transition layer on the contact surface of the stainless steel corrosion-resistant outer layer and the high-strength steel core;
the thickness of the stainless steel corrosion-resistant outer layer is 0.05mm-1.0mm, the thickness of the stainless steel corrosion-resistant outer layer is 1% -8% of the diameter of the composite steel wire, and the thickness of the metallurgical bonding transition layer is 0.02mm-0.10mm.
2. A high-strength corrosion-resistant stainless steel coated steel wire for a bridge cable, which is prepared by the preparation method of claim 1.
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Denomination of invention: A high-strength corrosion-resistant stainless steel coated steel wire for bridge cables and its preparation method Granted publication date: 20221101 Pledgee: China Construction Bank Co.,Ltd. Loudi branch Pledgor: HUNAN 3T NEW MATERIAL Co.,Ltd. Registration number: Y2021430000063 |
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