CN108486478A - A kind of 1960MPa grades of ocean engineering galvanized steel wire rope and its production method - Google Patents
A kind of 1960MPa grades of ocean engineering galvanized steel wire rope and its production method Download PDFInfo
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- CN108486478A CN108486478A CN201810544667.6A CN201810544667A CN108486478A CN 108486478 A CN108486478 A CN 108486478A CN 201810544667 A CN201810544667 A CN 201810544667A CN 108486478 A CN108486478 A CN 108486478A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/38—Wires; Tubes
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Abstract
The present invention provides a kind of 1960MPa grades of ocean engineering galvanized steel wire rope and its production methods, contain C 0.87~0.91%, Si 0.15~0.30%, Mn 0.65~0.85%, Cr 0.15~0.25%, V 0.020~0.060%, P≤0.015%, S≤0.010%, Ni≤0.05%, Cu≤0.10%, Alt≤0.010%, H≤1.0PPm, remaining is Fe and inevitable impurity element.Compared with prior art, the present invention optimizes refining, continuous casting process, avoid the occurrence of component segregation, using the controlled rolling and controlled cooling rolling mill practice of optimization, avoid the occurrence of network cementite and martensite, the metallographic structure that 90% or more sorbite rate can be obtained, the zinc-coated wire made of the hot rolling wire fully meet the requirement of 1960MPa grades of ocean engineering galvanized steel wire ropes.
Description
Technical field
The invention belongs to high-strength galvanized steel wire rope technical field of producing more particularly to a kind of oceans 1960MPa grades of
Engineering galvanized steel wire rope and its production method.
Background technology
Steel wire rope is the flexible cable twisted into more or multiply finer wire.The intensity of steel wire rope is high, from heavy and light, work
Steadily, whole root fracture suddenly, reliable operation are not easy.Due to steel wire rope special performance, one kind is not found also both at home and abroad so far
More preferably product comes comprehensively or substitutes steel wire rope in a field, thus, steel wire rope is in ocean engineering, metallurgy, mine, stone
The fields such as oily natural gas drilling, machinery, chemical industry, aerospace become essential component or material.China is in ocean
The critical period of engineering construction, the demand rapid growth of high-strength galvanized steel wire rope.
Currently, it is domestic successfully developed 1470,1570,1670,1770, the steel wire ropes of 1870MPa ranks, but
1960MPa and the above high-strength galvanized steel wire rope are being developed, especially ocean engineering superhigh intensity galvanized steel wire rope, domestic
Demand mainly uses imported product up to 60,000 tons/year, expensive.
Usual steel wire rope uses GB/T699, GB/T24238, GB/T23291 standard with steel.Intensity reaches 1960MPa grades
Not, and the large diameter wire rope of diameter 3mm or more often requires that the carbon content of material 0.85 or more, common 87B, 92A,
The trades mark such as 87Mn are all made of C-Si-Mn component systems.If only strengthening by C or Si, Mn, although can also realize that intensity is wanted
It asks, but network cementite and center portion martensite easily occurs, the serious performance for damaging material, the especially increase of Si contents, by
In its work hardening rate height, intensity may be implemented and quickly increase, but the plasticity and toughness of drawn steel wire is easily caused to drastically reduce.Separately
Outside, drawn steel wire can be replied in galvanizing, and intensity of steel wire and number of torsions is caused to decline, and need to add alloying element
It reduces intensity and number of torsions declines.
Invention content
The purpose of the present invention is to provide a kind of 1960MPa grades of ocean engineering galvanized steel wire ropes, C, Si, Mn in steel
It adjusts separately to 0.87~0.91%, 0.15~0.30%, 0.65~0.85%, P, S in steel are down to 0.015% respectively,
0.010% hereinafter, control Ni, Cu, Al content are respectively smaller than 0.05%, 0.10%, 0.010%, H content control less than
1.0PPm, addition Cr, V alloy element are respectively 0.15~0.25%, 0.020~0.060%, further increase intensity.
Another object of the present invention is to provide a kind of production method of 1960MPa grades of ocean engineering galvanized steel wire rope,
By optimization refining, continuous casting, rolling mill practice, network cementite and martensite are avoided the occurrence of, sorbite rate reaches 90% or more,
And loss of strength when significantly slowing down steel-wire galvanizing；Its stable processing technique, reliable, suitable big industrial production, galvanized steel
The tensile strength of silk is more than 1960MPa, and number of torsions is more than 25 times, and number of bends is more than 8 times.
Specific technical solution of the present invention is as follows：
A kind of 1960MPa grades of ocean engineerings galvanized steel wire rope steel provided by the invention, including following weight percent
Chemical composition：C 0.87~0.91%, Si 0.15~0.30%, Mn 0.65~0.85%, Cr 0.15~0.25%, V
0.020~0.060%, P≤0.015%, S≤0.010%, Ni≤0.05%, Cu≤0.10%, Alt≤0.010%, H≤
1.0PPm, remaining is Fe and inevitable impurity element.
A kind of production method of 1960MPa grades of ocean engineerings galvanized steel wire rope provided by the invention is：Using electric furnace smelting
Refining → LF+RH vacuum refinings → large round billet continuous casting → heating → breaking down cogging → tandem rolling → rolling square billet → flaw detection, reconditioning → height
Line heats stove heat → controlled rolling and controlled cooling → reducing sizing mill → Laying head → wire rod finished product → patenting → drawn steel wire → hot dip
Zinc → production steel wire rope → packaging and storage.
Using the raw material of production high-carbon steel, equipment and conventional production process is smelted, known method is used when smelting,
C, Si, Mn in steel are adjusted separately to 0.87~0.91%, 0.15~0.30%, 0.65~0.85%, and P, S in steel are distinguished
0.015%, 0.010% is down to hereinafter, controlling Ni, Cu, Al content is respectively smaller than 0.05%, 0.10%, 0.010%, H content control
For system less than 1.0PPm, addition Cr, V alloy element are respectively 0.15~0.25%, 0.020~0.060%, and use controlled rolling control
Cold technique is rolled.
Further, the controlled rolling and controlled cooling is specially：1000~1100 DEG C of billet heating temperature, start rolling temperature 950~
1000 DEG C, 850~900 DEG C of laying temperature.
Further, 10~15 DEG C/s of stelmor rapid cooling section cooling rate carries out isothermal phase change, collection volume at 550~650 DEG C
350~450 DEG C of temperature.
Further, wire rod rolling specs are φ 9.0,10.0mm.The wire rod of acquisition is without network cementite and martensite, rope
Family name's body rate is 90% or more, tensile strength Rm>=1240MPa, elongation percentage A >=8%, reduction of area Z >=30% of having no progeny.
Further, using the gren rod of above-mentioned preparation as raw material, advanced row patenting obtains full Soxhlet body tissue；
Then dead-beat continuous drawing machine drawn steel wire is utilized.
For the wire rod of Φ 9mm specifications, stelmor rapid cooling section 14 DEG C/s of cooling rate carries out isothermal phase change at 600 DEG C, collection
Roll up 350 DEG C of temperature.
For the wire rod of Φ 10mm specifications, stelmor rapid cooling section 12 DEG C/s of cooling rate carries out isothermal phase change at 620 DEG C,
Collection 400 DEG C of temperature of volume.
Further, to drawn steel wire carry out galvanizing, obtain diameter of phi 3.26,3.94,4.26mm steel wire, zinc layers weight
Measure 265g/m2。
Further, with conventional producing technique of steel cable, 1960MPa grades of ocean engineering galvanized steel wire ropes are made.Institute
The tensile strength of the zinc-coated wire obtained is more than 1960MPa, and number of torsions is more than 25 times, and number of bends is more than 8 times, fully meets
The requirement of 1960MPa grades of ocean engineering galvanized steel wire ropes.
Steel grade of the present invention only need to be by mentioned component range, the routinely smelting process in converter, electric furnace or other smelting furnaces
It can be realized, and can production tapping under conditions of using common rolling mill practice and cooling control on common high-speed rod-rolling mill
Cord carbon steel wire rod with high；Closing rope technique by conventional patenting, continous way drawing, galvanizing and twirl stock can produce
1960MPa grades of thick diameter ocean engineering galvanized steel wire ropes.
1960MPa is reached in order to increase intensity for high-carbon steel, C-Si-Mn component systems, carbon is generally used to contain
Amount common are 87B, 92A, 87Mn etc. 0.85 or more.In addition, for zinc-coated wire, due to that can occur back in galvanizing
It is multiple, cause intensity of steel wire and number of torsions to decline, some high Si ingredients (0.80~1.20%) of use, common are 87Si,
92Si etc. locks such as bridge and meets requirement it may ensure that obtaining the tensile strength of 1960MPa with zinc-plated prestress wire；
But the use of steel wire rope moves in circles, and needs high plasticity and toughness, the increase of Si contents, due to its work hardening rate height,
The plasticity and toughness of drawn steel wire are easily caused to drastically reduce, performance cannot be guaranteed.
Compared with prior art, the present invention C, Si, Mn in steel adjusted separately to 0.87~0.91%, 0.15~
0.30%, 0.65~0.85%, it is small that P, S in steel are down to 0.015%, 0.010% hereinafter, Ni, Cu, Al content difference respectively
In 0.05%, 0.10%, 0.010%, H content control less than 1.0PPm, addition Cr, V alloy element be respectively 0.15~
0.25%, 0.020~0.060%, optimization refining, continuous casting process are avoided the occurrence of component segregation, are rolled using the controlled rolling and controlled cooling of optimization
Technique processed, avoids the occurrence of network cementite and martensite, and the metallographic structure of 90% or more sorbite rate, hot rolling wire can be obtained
Tensile strength Rm>=1240MPa, elongation percentage A >=8%, reduction of area Z >=30% of having no progeny.It is made of the hot rolling wire zinc-plated
The tensile strength of steel wire is more than 1960MPa, and number of torsions is more than 25 times, and number of bends is more than 8 times, fully meets 1960MPa grades
The requirement of ocean engineering galvanized steel wire rope.
Description of the drawings
Fig. 1 is the gren rod metallographic structure for the tensile strength 1280MPa that embodiment 1 produces；
Fig. 2 is the gren rod metallographic structure for the tensile strength 1274MPa that embodiment 1 produces；
Fig. 3 is the gren rod metallographic structure for the tensile strength 1299MPa that embodiment 3 produces；
Fig. 4 is the gren rod metallographic structure for the tensile strength 1329MPa that embodiment 3 produces；
Specific implementation mode
Embodiment 1
A kind of 1960MPa grades of ocean engineering galvanized steel wire rope, including the chemical composition of following weight percent see the table below
1。
The smelting component (wt.%) of 1 steel of the present invention of table
| C | Si | Mn | P | S | Cr | Ni | Cu | V | Alt | H(PPm) |
| 0.87 | 0.19 | 0.72 | 0.008 | 0.007 | 0.21 | 0.03 | 0.05 | 0.03 | 0.005 | 0.5 |
Surplus is Fe and inevitable impurity.
The production method of above-mentioned 1960MPa grades of extra large work galvanized steel wire rope is：
Using electric furnace smelting → LF+RH vacuum refinings → large round billet continuous casting → heating → breaking down cogging → tandem rolling → rolling side
Base → flaw detection, reconditioning → high line heating stove heat → controlled rolling and controlled cooling → reducing sizing mill → Laying head → wire rod finished product → are packaged into
Library.Rolling specs are φ 9mm wire rods.Gained wire rod carry out again patenting → drawn steel wire → galvanizing → production steel wire rope →
Packaging and storage.
Using raw material, equipment and the smelting process for production of production high-carbon steel, known method is used when smelting, in steel
C, Si, Mn adjust separately to 0.87%, 0.19%, 0.72%, P, S in steel are down to 0.008%, 0.007% respectively,
Ni, Cu, Al content are controlled as 0.03%, 0.05%, 0.005%, and H content control is in 0.5PPm, addition Cr, V element point
Not Wei 0.21%, 0.03%, and rolled using cooling controlling and rolling controlling process.Controlling cold technological parameter is：1000 DEG C of heating temperature, is opened
Roll 960 DEG C of temperature, 880 DEG C of laying temperature.Stelmor rapid cooling section 14 DEG C/s of cooling rate carries out isothermal phase change, collection volume at 600 DEG C
350 DEG C of temperature.
Advanced row patenting obtains full Soxhlet body tissue；Then dead-beat continuous drawing machine drawn steel wire, hot dip are utilized
Zinc；Again with conventional producing technique of steel cable, 1960MPa grades of ocean engineering galvanized steel wire ropes are made.
The original specification of wire rod is Φ 9mm, and the steel wire of diameter of phi 3.26mm, zinc layer weight 265g/m is made2。
The gren rod that above-described embodiment 1 produces detects mechanical property and carries out tissue, as a result such as the following table 2.
The mechanical property of the gren rod of 2 embodiment 1 of table production and metallographic structure
The mechanical property of steel wire produced by the invention：Tensile strength is more than 1995MPa, number of torsions is more than 28 times, bending
Number is more than 10 times.
Embodiment 2
Using the gren rod of embodiment 1, leading patenting obtains full Soxhlet body tissue；Then dead-beat is utilized to connect
Continuous wire drawing machine drawn steel wire, galvanizing；Again with conventional producing technique of steel cable, 1960MPa grades of ocean engineerings are made with zinc-plated
Steel wire rope.
The original specification of wire rod is Φ 9mm, and the steel wire of diameter of phi 3.94, zinc layer weight 265g/m is made2。
The mechanical property of steel wire produced by the invention：Tensile strength is more than 1980MPa, number of torsions is more than 26 times, bending
Number is more than 9 times.
Embodiment 3
A kind of 1960MPa grades of ocean engineering galvanized steel wire rope, including the chemical composition of following weight percent see the table below
3。
The smelting component (wt.%) of 3 embodiment of table, 3 steel
| C | Si | Mn | P | S | Cr | Ni | Cu | V | Alt | H(PPm) |
| 0.90 | 0.21 | 0.72 | 0.009 | 0.005 | 0.20 | 0.02 | 0.04 | 0.03 | 0.005 | 0.5 |
Surplus is Fe and inevitable impurity.
The production method of above-mentioned 1960MPa grades of extra large work galvanized steel wire rope is：
Using electric furnace smelting → LF+RH vacuum refinings → large round billet continuous casting → heating → breaking down cogging → tandem rolling → rolling side
Base → flaw detection, reconditioning → high line heating stove heat → controlled rolling and controlled cooling → reducing sizing mill → Laying head → wire rod finished product → are packaged into
Library.Rolling specs are φ 10mm wire rods.Gained wire rod carries out patenting → drawn steel wire → galvanizing → production steel wire rope again
→ packaging and storage.
Using the raw material of production high-carbon steel, equipment and conventional production process is smelted, known method is used when smelting,
C, Si, Mn in steel are adjusted separately to 0.90%, 0.21%, 0.72%, P, S in steel are down to 0.009% respectively,
0.005%, Ni, Cu, Al content are controlled as 0.02%, 0.04%, 0.005%, H content control in 0.5PPm, addition Cr,
V element is respectively 0.20%, 0.03%, and is rolled using cooling controlling and rolling controlling process.Controlling cold technological parameter is：Heating temperature
1100 DEG C, 980 DEG C of start rolling temperature, 860 DEG C of laying temperature.Stelmor rapid cooling section 12 DEG C/s of cooling rate, isothermal is carried out at 620 DEG C
Phase transformation, collection 400 DEG C of temperature of volume.
Advanced row patenting obtains full Soxhlet body tissue；Then dead-beat continuous drawing machine drawn steel wire, hot dip are utilized
Zinc；Again with conventional producing technique of steel cable, 1960MPa grades of ocean engineering galvanized steel wire ropes are made.
The original specification of wire rod is Φ 10mm, and the steel wire of diameter of phi 4.26mm, zinc layer weight 265g/m is made2。
The gren rod that above-described embodiment 3 produces detects mechanical property and carries out tissue, as a result such as the following table 4.
The mechanical property of the gren rod of 4 embodiment 3 of table production and metallographic structure
The mechanical property of steel wire produced by the invention：Tensile strength is more than 1960MPa, number of torsions is more than 25 times, bending
Number is more than 8 times.
Claims (10)
1. a kind of 1960MPa grades of ocean engineering galvanized steel wire rope, which is characterized in that the 1960MPa grades of ocean engineering plating
Zinc steel wire rope includes the chemical composition of following weight percent：
C 0.87~0.91%, Si 0.15~0.30%, Mn 0.65~0.85%, Cr 0.15~0.25%, V 0.020~
0.060%, P≤0.015%, S≤0.010%, Ni≤0.05%, Cu≤0.10%, Alt≤0.010%, H≤1.0PPm,
Remaining is Fe and inevitable impurity element.
2. a kind of production method of 1960MPa described in claim 1 grades of ocean engineering galvanized steel wire ropes, the method are：
Using electric furnace smelting → LF+RH vacuum refinings → large round billet continuous casting → heating → breaking down cogging → tandem rolling → rolling square billet → spy
Wound, reconditioning → high line heat stove heat → controlled rolling and controlled cooling → reducing sizing mill → Laying head → wire rod finished product → patenting → drawing
Steel wire → galvanizing → production steel wire rope → packaging and storage, which is characterized in that the controlled rolling and controlled cooling is specially：Billet heating temperature
1000~1100 DEG C, 950~1000 DEG C of start rolling temperature, 850~900 DEG C of laying temperature.
3. production method according to claim 2, which is characterized in that stelmor rapid cooling section 10~15 DEG C/s of cooling rate,
Isothermal phase change, collection 350~450 DEG C of temperature of volume are carried out at 550~650 DEG C.
4. production method according to claim 3, which is characterized in that for the wire rod of Φ 9mm specifications, stelmor rapid cooling
Section 14 DEG C/s of cooling rate carries out isothermal phase change, collection 350 DEG C of temperature of volume at 600 DEG C.
5. production method according to claim 3, which is characterized in that for the wire rod of Φ 10mm specifications, stelmor is fast
12 DEG C/s of cold section of cooling rate carries out isothermal phase change, collection 400 DEG C of temperature of volume at 620 DEG C.
6. the production method according to right 2 or 3, which is characterized in that gained wire rod finished product without network cementite and martensite,
Sorbite rate is 90% or more, tensile strength Rm>=1240MPa, elongation percentage A >=8%, reduction of area Z >=30% of having no progeny.
7. production method according to claim 2 or 3, which is characterized in that the advanced row patenting of gained gren rod obtains
Obtain full Soxhlet body tissue；Then dead-beat continuous drawing machine drawn steel wire is utilized；Galvanizing is carried out to drawn steel wire again.
8. production method according to claim 7, which is characterized in that 3.26,3.94 or 4.26mm of gained steel wire diameter Φ.
9. production method according to claim 7 or 8, which is characterized in that gained steel wire zinc layer weight 265g/m2。
10. production method according to claim 1 or 4, which is characterized in that the tensile strength of zinc-coated wire is more than
1960MPa, number of torsions are more than 25 times, and number of bends is more than 8 times.
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| CN110819899A (en) * | 2019-11-19 | 2020-02-21 | 马鞍山钢铁股份有限公司 | Steel for 2100MPa grade marine steel wire rope and production method thereof |
| CN110863149A (en) * | 2019-11-13 | 2020-03-06 | 浙江金洲管道科技股份有限公司 | Hot-dip galvanized steel pipe and manufacturing method thereof |
| CN112301287A (en) * | 2020-11-09 | 2021-02-02 | 江苏省沙钢钢铁研究院有限公司 | Prestressed steel strand, wire rod for prestressed steel strand and production method of wire rod |
| CN112501506A (en) * | 2020-11-15 | 2021-03-16 | 江苏永钢集团有限公司 | Steel wire rod for bridge cable and manufacturing method thereof |
| CN114032372A (en) * | 2021-11-25 | 2022-02-11 | 张家港荣盛特钢有限公司 | Wire rod, heat treatment method and production method thereof and galvanized steel wire |
| CN115387141A (en) * | 2022-08-16 | 2022-11-25 | 江苏狼山钢绳股份有限公司 | Long-acting bearing cable for ocean engineering |
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| CN112501506A (en) * | 2020-11-15 | 2021-03-16 | 江苏永钢集团有限公司 | Steel wire rod for bridge cable and manufacturing method thereof |
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| CN114032372B (en) * | 2021-11-25 | 2023-02-17 | 张家港荣盛特钢有限公司 | Wire rod, heat treatment method and production method thereof and galvanized steel wire |
| CN115387141A (en) * | 2022-08-16 | 2022-11-25 | 江苏狼山钢绳股份有限公司 | Long-acting bearing cable for ocean engineering |
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