CN108252133A - Super large-scale low relaxed prestress steel strand and its manufacturing method - Google Patents
Super large-scale low relaxed prestress steel strand and its manufacturing method Download PDFInfo
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- CN108252133A CN108252133A CN201711292886.1A CN201711292886A CN108252133A CN 108252133 A CN108252133 A CN 108252133A CN 201711292886 A CN201711292886 A CN 201711292886A CN 108252133 A CN108252133 A CN 108252133A
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- 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
-
- 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
- D07B1/0673—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
-
- 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
- D07B2201/2009—Wires or filaments characterised by the materials used
-
- 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
- D07B2201/2038—Strands characterised by the number of wires or filaments
- D07B2201/2039—Strands characterised by the number of wires or filaments three to eight wires or filaments respectively forming a single layer
Abstract
The invention belongs to prestress wire technical fields,Especially a kind of 1 × 7 structure super large-scale low relaxed prestress steel strand and its manufacturing method,Including a central hair and six roots of sensation outer layer side silk,A diameter of 8.16~8.26 millimeters of the central hair,A diameter of 7.78~7.88 millimeters of the every outer layer side silk,Central hair is increased than being 4%~6%,Gap between the silk of side is at 0.2~0.3 millimeter,Outer layer side silk and the nominal diameter after central hair twisting are 23.6 millimeters after plying,The manufacturing method of the super large-scale low relaxed prestress steel strand includes drawing,Stabilization processes under twisting and tension tempering,Value of thrust after the central hair drawing is more than or equal to 96.82 thousand Ns,Value of thrust after the silk drawing of outer layer side is more than or equal to 88.60 thousand Ns,The tensile strength of super large-scale low relaxed prestress steel strand after twisting and stabilization processes is more than or equal to 1770 megapascal,Maximum, force is more than or equal to 602.00 thousand Ns,Maximum, force percentage of total elongation reaches more than 4.5%,Relaxation value is less than 2.5% within 1000 hours.
Description
Technical field
The invention belongs to prestress wire technical fields, are related to the steel strand wires of 1 × 7 structure, and especially super large-scale is low
Relaxation prestress wire and its manufacturing method.
Background technology
Prestressed Construction Technology is in highway, intercity speed rail, high-rise building, hydraulic and hydroelectric engineering, nuclear power station
Be developed rapidly in the application fields such as engineering, coal mining, needed in some fields with prestressing force Anchorage Technology into
Row slope reinforcement, geological disaster protection, the supporting of deep basal pit digging, iron (public affairs) road tunnel and coal cutting roadway.
Prestress wire is mainly used for Rail Highway bridge, large span stayed-cable bridge, mine roadway support, ground anchorage work
Journey.It is increasing to the size and requirement for bearing capacity of steel strand wires.Standard GB/T/T5224-2014《Steel for prestressed concrete
Twisted wire》, 1 × 7 structure maximum specification regulation is to 21.6 millimeters of Φ, and the standard of every country only provides 17.8 millis of Φ in the world
Rice.This is just constrained to construction technology complicated condition, the Implement Construction development of the engineering project high to super large requirement for bearing capacity.
China generally uses the prestress wire of 1 × 7 structure, only part in prestressed architecture engineering field at present
Coal mine support field employs the steel strand wires of 1 × 19 structure.Because 1 × 19 structure steel strand wires are formed for three layers of multifilament structure,
Product manufacturing and work progress, the matching between steel wire and steel wire, there is certain skills for the matching between steel wire and anchor clamp
Art defect, by stripped thread is be easy to cause after stretching force, declining the total bearing capacity of prestressed component influences construction quality.Industry
The technical research work of this respect is inside being done, distance reaches the perfect condition used and also has certain time.This is certain
Application and development of 1 × 19 structure steel strand wires in building engineering field are constrained in degree.
The prestress wire of 1 × 7 structure, super large-scale, high-bearing capacity, compared with Gao Yan are thus used in architectural engineering mostly
Stretch, the prestress wire of underrelaxation is still the developing direction and mainstream of current and expected future.At present, 1 × 7 construction pre-stress
The maximum specification of steel strand wires is 21.6 millimeters, and most of manufacturers are limited by production equipment cannot still produce 21.6 millimeters of Φ
And the product of Yi Shang specification, and the rolling of just current existing raw material is horizontal, the dimensional strengths of common YL82B raw materials it is difficult to ensure that
21.6 millimeters of finished product tensile strength of Φ reach 1770MPa grades, and practical maximum, force can only achieve 510kN.Current 1 × 7 structure is maximum
The requirement of 21.6 millimeters of the Φ super large bearing capacity prestressed Construction Technologies difficult to realize of specification.
Steel strand wires be by 7 steel wires on machine by regulation primary twisting into twisted wire, be carried out at the same time stabilization processes.Every
Steel wire carries out wire rod surface treatment, drawing, twisting, stabilization processes, obtains having tensile strength is high, higher ductility, low
It relaxes, being used in mal-condition has the advantages of high bearing capacity, height extends, long lifespan, is applied to super-long span bridges and builds
If, architectural engineering, the industries such as ultra-deep colliery tunnel support.At present, the technique of steel strand wires is：It is determined including raw material, raw material
Drawing process, the stabilization processes being tempered under the twisting and tension of steel wire, water cooling processing, in the above process, not only raw material will
Well-designed chemical composition, and also need to be designed the structure size of the steel wire of composition steel strand wires, form steel after making twisting
It was not only had the gap between the steel wire of twisted wire, but also close not loose.And the technological parameter in each step be required to repetition test with
Most preferred scheme is obtained, but there are problems that every aspect in existing technique, such as：Raw material rolling is not horizontal high, causes
Big specification (common 14.0 millimeters of YL82B Φ) wire rod structural state is undesirable, and original tensile strength does not reach requirement, pulling enhancing
Coefficient is not high, causes tensile strength of wire low, raw material drawing process parameter designing is coarse or twisting after the choosing of stabilisation parameter
That selects is improper, this results in the finished products of super large-scale steel strand wires there are structure is close, tensile strength reduces, and relaxation property is paid no attention to
The defects of thinking or underrelaxation performance be not achieved.
Invention content
It is an object of the invention in place of overcome the deficiencies in the prior art, provide 1 × 7 structure, 23.6 millimeters of super large rule of Φ
Lattice, a kind of super large-scale low relaxed prestress steel strand and its manufacturing method that finished product tensile strength is high, bearing capacity is big.
The present invention solves its technical problem and following technical scheme is taken to realize：
Super large-scale low relaxed prestress steel strand, including a central hair and six roots of sensation outer layer side silk, it is characterised in that：Institute
The outer rim that six roots of sensation outer layer side silk is wound on central hair counterclockwise is stated, six roots of sensation outer layer side silk synchronizes the same lay pitch around central hair coiling
Primary plying molding, a diameter of 8.16~8.26 millimeters of the central hair, the every outer layer side silk a diameter of 7.78~
7.88 millimeters, central hair is increased than for 4%~6%, the gap between the silk of side is 0.2~0.3 millimeter, the outer profile of central hair with
Six roots of sensation outer layer side silk is contacted into line, and outer layer side silk and the nominal diameter after central hair twisting are 23.6 millimeters after plying；
Include under drawing, twisting and tension tempering for the manufacturing method of above-mentioned super large-scale low relaxed prestress steel strand
Stabilization processes；
The drawing includes the following steps：
(1) using the steel of model YL85B-SD, 0.05~0.15% vanadium and 0.10 is added in the steel of YL85B-SD
~0.15% molybdenum is as raw material wire rod；
The chemical composition mass fraction of the raw material wire rod is：
C：0.83~0.87%Si：0.12~0.30%Mn：0.60~0.90%P：≤ 0.025%
S:≤ 0.025%Cr:≤ 0.35%Cu:≤ 0.20%Ni:≤ 0.10%V：0.05~0.15%
Mo：0.10~0.15%；
The raw material wire rod is the cold gren rod of control of microalloying, and diameter specifications are determined as 16.0 millimeters of Φ；Raw material disk
Tensile strength >=1250MPa；
(2) using nine tank body continuous drawing devices, every time wire drawing tank body is by the electricity that a rated power is more than 130kW
Machine drives, and carries out drawing to central hair and outer layer side silk respectively, and the outer layer side silk is drawn to by 16.0 millimeters through eight passages
7.78~7.88 millimeters；The central hair is drawn to 8.16~8.26 millimeters by 16.0 millimeters through seven passages；
(3) tensile strength after central hair drawing reaches 1820MPa, and the tensile strength after the silk drawing of outer layer side need to reach
1840MPa；
The twisting and tension tempering under stabilization processes, the equipment maximum productivity used for 28.6 millimeters of Φ,
Stabilization processes intermediate frequency furnace power 800kW, tension system maximum, force 500kN；The stabilization being tempered under the twisting and tension
The lay pitch for changing processing is 283~330 millimeters, and temperature is 385~395 degrees Celsius, and clamping tension is 260~270,000 Ns.
Moreover, the manufacturing method of super large-scale low relaxed prestress steel strand according to claim 2, feature exist
In：Value of thrust after the central hair drawing is more than or equal to 96.82 thousand Ns, and the value of thrust after the silk drawing of outer layer side is more than or equal to
88.60 thousand Ns, the tensile strength of the super large-scale low relaxed prestress steel strand after twisting and stabilization processes is more than or equal to
1770 megapascal, maximum, force are more than or equal to 602.00 thousand Ns, and maximum, force percentage of total elongation reaches more than 4.5%, 1000 hours relaxation values
Less than 2.5%.
The advantages and positive effects of the present invention are：
In the present invention, including central hair and six roots of sensation outer layer side silk, six roots of sensation outer layer side silk is wound on the outer of central hair counterclockwise
Edge, six roots of sensation outer layer side silk synchronize the same lay pitch around central hair coiling, and primary plying is molded, and a diameter of the 8.16~8.26 of central hair
Millimeter, a diameter of 7.78~7.88 millimeters of the every outer layer side silk, outer layer side silk and the public affairs after central hair twisting after plying
Claim a diameter of 23.6 millimeters, using the structure snd size of above-mentioned central hair and outer layer side silk so that central hair is increased than being 4%
~6%, the gap between the silk of side is maintained between 0.2 millimeter~0.3 millimeter, the outer profile of central hair and six roots of sensation outer layer side silk into
Line contacts, and makes not only to have the gap between the steel wire of composition steel strand wires after twisting, but also close not loose；Using raw material trade mark chemical composition
Microalloying YL85B-SD wire rods, 16.0 millimeters of raw material wire rod specification containing 0.05~0.15% vanadium and 0.10~0.15% molybdenum,
The original tensile strength of raw material wire rod is more than or equal to 1250MPa, selects to disclosure satisfy that super large-scale wire rod is drawn in drawing process
The equipment pulled out selects wire drawing tank body motor rated power as 130kW wire-drawing equipments and well-designed drawing parameter, in twisting
During the stabilization processes being tempered under the lay pitch and twisting backward pull, by the temperature of design, the parameter coordinations such as clamping tension are obtained
Finished product uniform close, winding displacement is neat, not loosely；It is matched by above-mentioned wire rod and technique, the diameter for the steel strand wires made is more than
It is more than or equal to 1770 megapascal equal to 23.6 millimeters, tensile strength, rupture pull force is more than or equal to 602kN, maximum, force percentage of total elongation reaches
To more than 4.5%, have compared with high extensibility, 1000 hours relaxation values are less than 2.5%, bearing capacity is big, service life is long.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
Below by specific embodiment, the invention will be further described, and following embodiment is descriptive, is not limit
Qualitatively, it is impossible to which protection scope of the present invention is limited with this.
The super large-scale low relaxed prestress steel strand of 1 × 7 Φ, 23.6 specifications, including a central hair 2 and six roots of sensation outer layer
Side silk 1, innovation of the invention is, the six roots of sensation outer layer side silk is wound on the outer rim of central hair, the six roots of sensation outer layer side counterclockwise
Silk synchronizes the same lay pitch and once combines molding around central hair coiling, a diameter of 8.16~8.26 millimeters of the central hair, every
A diameter of 7.78~7.88 millimeters of the outer layer side silk, central hair are increased than being 4%~6%, and the gap α between the silk of side exists
0.2~0.3 millimeter, the outer profile of central hair is contacted with six roots of sensation outer layer side silk into line, outer layer side silk and central hair twisting after plying
Nominal diameter Φ afterwards is 23.6 millimeters；
Include drawing for the manufacturing method of the super large-scale low relaxed prestress steel strand of above-mentioned 1 × 7- Φ 23.6mm specifications
It pulls out, the stabilization processes under the tempering of twisting and tension；
The drawing includes the following steps：
(1) using the steel of model YL85B-SD, 0.05~0.15% vanadium and 0.10 is added in the steel of YL85B-SD
~0.15% molybdenum is as raw material wire rod；
The chemical composition mass fraction of the raw material wire rod is：
C：0.83~0.87%Si：0.12~0.30%Mn：0.60~0.90%P：≤ 0.025%
S:≤ 0.025%Cr:≤ 0.35%Cu:≤ 0.20%Ni:≤ 0.10%V：0.05~0.15%
Mo：0.10~0.15%；
The raw material wire rod is the cold gren rod of control of microalloying, and diameter specifications are determined as 16.0 millimeters of Φ；Raw material disk
Tensile strength >=1250MPa；
(2) using nine tank body continuous drawing devices, every time wire drawing tank body is by the electricity that a rated power is more than 130kW
Machine drives, and carries out drawing to central hair and outer layer side silk respectively, and the outer layer side silk is drawn to by 16.0 millimeters through eight passages
7.78~7.88 millimeters；The central hair is drawn to 8.16~8.26 millimeters by 16.0 millimeters through seven passages；
(3) tensile strength after central hair drawing reaches 1820MPa, and the tensile strength after the silk drawing of outer layer side need to reach
1840MPa；
The twisting and tension tempering under stabilization processes, the equipment maximum productivity used for 28.6 millimeters of Φ,
Stabilization processes intermediate frequency furnace power 800kW, tension system maximum, force 500kN；The stabilization being tempered under the twisting and tension
The lay pitch for changing processing is 283~330 millimeters, and temperature is 385~395 degrees Celsius, and clamping tension is 260~270,000 Ns.
The super large-scale steel strand wires, central hair are increased than being 4%~6%, and the gap α between the silk of side is in 0.2~0.3 milli
Rice, the outer profile of central hair are contacted with six roots of sensation outer layer side silk into line, and outer layer side silk and the nominal after central hair twisting are straight after plying
Diameter Φ is 23.6 millimeters.
In the present embodiment, the value of thrust after the central hair drawing is more than or equal to 96.82 thousand Ns, after the silk drawing of outer layer side
Value of thrust is more than or equal to 88.60 thousand Ns, the tension of the super large-scale low relaxed prestress steel strand after twisting and stabilization processes
Intensity is more than or equal to 1770 megapascal, and maximum, force is more than or equal to 602.00 thousand Ns, and maximum, force percentage of total elongation reaches more than 4.5%,
Relaxation value is less than 2.5% within 1000 hours.
Claims (3)
1. super large-scale low relaxed prestress steel strand, including a central hair and six roots of sensation outer layer side silk, it is characterised in that：It is described
Six roots of sensation outer layer side silk is wound on the outer rim of central hair counterclockwise, and six roots of sensation outer layer side silk synchronizes the same lay pitch around central hair coiling one
Secondary plying molding, a diameter of 8.16~8.26 millimeters of the central hair, every outer layer side silk a diameter of 7.78~
7.88 millimeters, central hair is increased than being 4%~6%, and the gap between the silk of side is the outer profile of central hair at 0.2~0.3 millimeter
It is contacted with six roots of sensation outer layer side silk into line, outer layer side silk and the nominal diameter after central hair twisting are 23.6 millimeters after plying.
2. the manufacturing method of super large-scale low relaxed prestress steel strand according to claim 1, it is characterised in that：It is described
The manufacturing method of super large-scale low relaxed prestress steel strand includes the stabilization processes under drawing, twisting and tension tempering；
The drawing includes the following steps：
(1) using the steel of model YL85B-SD, added in the steel of YL85B-SD 0.05~0.15% vanadium and 0.10~
0.15% molybdenum is as raw material wire rod；
The chemical composition mass fraction of the raw material wire rod is：
C：0.83~0.87% Si：0.12~0.30% Mn：0.60~0.90% P：≤ 0.025% S:≤ 0.025%
Cr:≤ 0.35% Cu:≤ 0.20% Ni:≤ 0.10% V：0.05~0.15% Mo：0.10~0.15%；
The raw material wire rod is the cold gren rod of control of microalloying, and diameter specifications are determined as 16.0 millimeters of Φ；Raw material wire rod resists
Tensile strength >=1250MPa；
(2) using nine tank body continuous drawing devices, every time wire drawing tank body is by the motor band that a rated power is more than 130kW
It is dynamic, carry out drawing to central hair and outer layer side silk respectively, the outer layer side silk by 16.0 millimeters is drawn to 7.78 through eight passages~
7.88 millimeter；The central hair is drawn to 8.16~8.26 millimeters by 16.0 millimeters through seven passages；
(3) tensile strength after central hair drawing reaches 1820MPa, and the tensile strength after the silk drawing of outer layer side need to reach
1840MPa；
Stabilization processes under the twisting and tension tempering, the equipment maximum productivity used are stablized for 28.6 millimeters of Φ
Change processing intermediate frequency furnace power 800kW, tension system maximum, force 500kN；At the stabilisation being tempered under the twisting and tension
The lay pitch of reason is 283~330 millimeters, and temperature is 385~395 degrees Celsius, and clamping tension is 260~270,000 Ns.
The super large-scale steel strand wires, central hair are increased than for 4%~6%, the gap α between the silk of side at 0.2~0.3 millimeter,
The outer profile of central hair is contacted with six roots of sensation outer layer side silk into line, outer layer side silk and the nominal diameter Φ after central hair twisting after plying
It is 23.6 millimeters.
3. the manufacturing method of super large-scale low relaxed prestress steel strand according to claim 2, it is characterised in that：It is described
Value of thrust after central hair drawing is more than or equal to 96.82 thousand Ns, and the value of thrust after the silk drawing of outer layer side is more than or equal to 88.60 thousand
The tensile strength of super large-scale low relaxed prestress steel strand after ox, twisting and stabilization processes is more than or equal to 1770 megapascal,
Maximum, force is more than or equal to 602.00 thousand Ns, and maximum, force percentage of total elongation reaches more than 4.5%, and relaxation value is less than 2.5% within 1000 hours.
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|---|---|---|---|
| CN201711292886.1A CN108252133B (en) | 2017-12-08 | 2017-12-08 | Super-large-specification low-relaxation prestressed steel strand and manufacturing method thereof |
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| CN108252133B CN108252133B (en) | 2020-12-15 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338770A (en) * | 2018-12-11 | 2019-02-15 | 天津冶金集团中兴盛达钢业有限公司 | A kind of long-span electric transmission line super extra-high strong galvanized strand wires and its twisting method |
| CN109604368A (en) * | 2018-12-11 | 2019-04-12 | 天津冶金集团中兴盛达钢业有限公司 | A kind of aerial condutor super extra-high strong zinc-coated wire and its manufacturing method |
| CN109853274A (en) * | 2018-12-26 | 2019-06-07 | 天津冶金钢线钢缆集团有限公司 | HDPE hot dip allumen prestress wire production technology |
| CN109930407A (en) * | 2019-04-17 | 2019-06-25 | 安徽省力通稀土钢缆有限公司 | A kind of production technology of corrosion prevention oiling PC steel strand wires |
| CN112955602A (en) * | 2018-10-23 | 2021-06-11 | 贝卡尔特先进帘线阿尔特公司 | Steel cord, coated steel cord and belt comprising steel cord |
| CN114350913A (en) * | 2021-12-27 | 2022-04-15 | 江苏省沙钢钢铁研究院有限公司 | Steel strand stabilizing treatment process and treated steel strand |
| CN114561821A (en) * | 2022-04-28 | 2022-05-31 | 天津市新天钢中兴盛达有限公司 | Super-large-diameter steel strand for mine anchor cable and manufacturing method thereof |
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Cited By (10)
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| CN112955602A (en) * | 2018-10-23 | 2021-06-11 | 贝卡尔特先进帘线阿尔特公司 | Steel cord, coated steel cord and belt comprising steel cord |
| CN112955602B (en) * | 2018-10-23 | 2023-07-14 | 贝卡尔特先进帘线阿尔特公司 | Steel wire rope, coated steel wire rope and belt comprising steel wire rope |
| CN109338770A (en) * | 2018-12-11 | 2019-02-15 | 天津冶金集团中兴盛达钢业有限公司 | A kind of long-span electric transmission line super extra-high strong galvanized strand wires and its twisting method |
| CN109604368A (en) * | 2018-12-11 | 2019-04-12 | 天津冶金集团中兴盛达钢业有限公司 | A kind of aerial condutor super extra-high strong zinc-coated wire and its manufacturing method |
| CN109338770B (en) * | 2018-12-11 | 2021-12-07 | 天津市新天钢中兴盛达有限公司 | Super-extra-high-strength galvanized steel strand for long-span transmission line |
| CN109853274A (en) * | 2018-12-26 | 2019-06-07 | 天津冶金钢线钢缆集团有限公司 | HDPE hot dip allumen prestress wire production technology |
| CN109930407A (en) * | 2019-04-17 | 2019-06-25 | 安徽省力通稀土钢缆有限公司 | A kind of production technology of corrosion prevention oiling PC steel strand wires |
| CN114350913A (en) * | 2021-12-27 | 2022-04-15 | 江苏省沙钢钢铁研究院有限公司 | Steel strand stabilizing treatment process and treated steel strand |
| CN114561821A (en) * | 2022-04-28 | 2022-05-31 | 天津市新天钢中兴盛达有限公司 | Super-large-diameter steel strand for mine anchor cable and manufacturing method thereof |
| CN114561821B (en) * | 2022-04-28 | 2022-07-26 | 天津市新天钢中兴盛达有限公司 | Super-large-diameter steel strand for mine anchor cable and manufacturing method thereof |
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