CN102936688B - Wire with tensile strength>=2000MPa for bridge cable and production method - Google Patents
Wire with tensile strength>=2000MPa for bridge cable and production method Download PDFInfo
- Publication number
- CN102936688B CN102936688B CN201210473122.3A CN201210473122A CN102936688B CN 102936688 B CN102936688 B CN 102936688B CN 201210473122 A CN201210473122 A CN 201210473122A CN 102936688 B CN102936688 B CN 102936688B
- Authority
- CN
- China
- Prior art keywords
- control
- wire
- temperature
- rolling
- 2000mpa
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Abstract
The invention discloses a wire with tensile strength>=2000MPa for a bridge cable and a production method. The wire comprises, by weight, 0.95-1.2% of C, 0.1-0.48% of Si, 0.6-1.0% of Mn, 0.1-0.5% of Cr, 0.01-0.05% of V, Cu<=0.05%, 0.05-0.15% of Al, 0.01-0.03% of N, P<=0.025% and S<=0.015%. The production method includes smelting and continuously casting into blanks; heating the casting blanks; rolling; heating again; high-speed rolling; spinning; air cooling to the room temperature; and placing for standby. According to the wire and the method, continuous casting of blooms, rolling starting of billets and high speed wire rolling are adopted, therefore a metallographic structure and the like of the wire for the bridge cable are even, and grains are better refined; and processes of rapid cooling with a large air volume and the like are adopted, therefore the tensile strength of the wire for the bridge cable is >=2000MPa and stable, a twist number reaches >=15, and wire fracture caused by the wire quality does not happen during cold drawing.
Description
Technical field
The present invention relates to wire rod and production method thereof, belong to particularly bridge cable wire rod and production method thereof, is bridge cable wire rod and the production method of tensile strength >=2000MPa definitely.
Background technology
At present, production at bridge cable with wire rod, with regard to tensile strength in 1200MPa to 1900MPa, the deficiency existing is that tensile strength fluctuation is large, unstable, particularly in summer, be subject to the impact of envrionment temperature, in the time of the wire rod of the thick specification of high speed wire rolling, the cooling power deficiency of stelmo line, it is more outstanding that this phenomenon shows.
But with regard to existing market, according to the development of bridge, need bridge cable wire rod more than 2000MPa, so, produce difficulty just larger, performance is more difficult to ensure.
Look in the document of publishing, there is the report about bridge rope steel wire rod: Chinese Patent Application No.: the patent documentation of CN201110103180.2, it discloses " a kind of 1670MPa level bridge cable galvanized steel wire wire rod and preparation method ", and what it adopted is the technique of continuous small-billet casting → high speed wire rolling.Although its component and content can be guaranteed the intensity of wire rod and be greater than 1200MPa, cannot make the intensity of bridge rope steel wire rod reach 2000MPa.In addition, according to the test-results of Baosteel and Wuhan Iron and Steel Plant, its production technique is difficult to ensure strength property stable of bridge rope steel wire rod.
Chinese Patent Application No. CN201210132587.2: patent documentation, it discloses " a kind of 1860MPa level bridge cable galvanized steel wire wire rod and manufacture method thereof ", its rolling technology adopts higher rolling temperature, can reduce the sorbite ratio in wire rod, be unfavorable for the raising of wire rod tensile strength.Although its component and content can be guaranteed the intensity of wire rod and be greater than 1200MPa, cannot make the intensity of bridge rope steel wire reach 2000MPa.In addition, the deficiency that its technique exists: 1) in casting cycle owing to adopting argon shield, there is no clear and definite other control technique, blank heart portion carbon segregation is lower than 1.08.
The patent documentation of Chinese Patent Application No. CN201010291415.0, it discloses " a kind of high-strength high-carbon steel wire rod and production method thereof. ", it is the steel wire that the diameter of production is 5.5 ~ 8.0mm, it is only the steel of carbon containing, manganese element, its composition has determined to expect high-intensity wire rod, can only pass through the larger draft of strand, produce the wire rod that diameter is less than 8.0mm.
The patent documentation of Chinese Patent Application No. CN200710093823.3, it discloses " a kind of 1770MPa level bridge stay cable galvanized steel wire wire rod and manufacture method thereof. ", this invention for 1860MPa level bridge cable galvanized steel wire with for wire rod, although component and content can be guaranteed the intensity of wire rod and be greater than 1200MPa, cannot make the intensity of steel wire reach 2000MPa.
Summary of the invention
The object of the invention is to overcome the tensile strength that can not meet at present market demands and be greater than the demand of wire rod for the bridge cable of 2000MPa, and the unsettled deficiency of strength property, provide that a kind of composition is simple, the tensile strength of bridge cable steel wire is greater than 2000MPa and stablize, torsion value reaches >=and 15 times, in cold drawing process, do not produce bridge cable wire rod and the production method of fracture of wire phenomenon.
Realize the measure of above-mentioned purpose:
The bridge cable wire rod of tensile strength >=2000MPa, its component and weight percent content are: C:0.95～1.2%, Si:0.1%～0.48%, Mn:0.6～1.0%, Cr:0.1～0.5%, V:0.01～0.05%, Cu≤0.05%, Al:0.05～0.15%, N:0.01～0.03%, P≤0.025%, S≤0.015%, surplus is Fe and inevitable impurity.
The method of wire rod for the bridge cable of production tensile strength >=2000MPa, its step:
1) smelt also continuous casting and become base, the cross dimensions of controlling strand is at least 300 х 400mm; Control tundish superheating temperature and be no more than 20 DEG C; Control casting speed at 0.3～0.6m/min; The section draft of controlling after strand is gently depressed is not more than 8.0%;
2) strand is heated, control soaking temperature at 1250～1500 DEG C, control time inside furnace and be not less than 300min;
3) be rolled, control start rolling temperature and be not less than 1200 DEG C; Open rolling becomes cross dimensions to be not more than the square billet of 250 × 250mm;
4) again heat, control soaking temperature not higher than 1050 DEG C, soaking time 100～200 min;
5) carry out high-speed rolling, control roughing start rolling temperature at 900～980 DEG C, control finish rolling start rolling temperature not higher than 850 DEG C;
6) weave silk, control laying temperature and be not less than 920 DEG C;
7) air-cooled to room temperature, control air-cooled line roller table speed extreme difference 1.05～1.12, control speed of cooling at 5～15 DEG C/S;
8) stand-by.
A kind of bridge cable of the present invention is as follows by the mechanism of action of each alloy ingredient in carbon steel wire rod with high:
Carbon of the present invention (C) content is 0. 95 ~ 1.20%, and carbon is most important component in steel, and carbon content directly determines its intensity and plasticity.Under cold drawn state, tensile strength improves constantly with the increase of carbon content, plasticity with carbon content increase reduce.
Silicon of the present invention (Si) content is 0.10%～0.48%, and silicon is also as a kind of reductor, adds in steel with ferrosilicon form, can eliminate the detrimentally affect that FeO is mingled with, and steel are played a part to even compact.The rising of silicone content, can obviously improve the elastic limit of steel wire, but also can make plasticity, toughness and ductility obviously reduce.In the time that silicon appears in steel with silicate form, unfavorable to drawing, wortle is is easily worn and torn, or form inclusion and cause steel wire fracture, there is the antiacid tendency of washing simultaneously, also unfavorable to pickling.
Manganese of the present invention (Mn) content is 0.60%～1.0%, and it is the good reductor of steel-making, smelts the manganese sulfide, the manganese oxide that in reaction, generate the cold drawn performance of wire rod is not produced to harmful effect, and manganese becomes MnS can also alleviate the deleterious effect of sulphur with sulfuration symphysis.Manganese can also increase perlite relative quantity, and perlite is attenuated.So the increase of manganese content can make the intensity of steel wire and hardness improve, yield strength and relative reduction in area also increase to some extent.Manganese major part is dissolved in ferrite, forms substitutional solid solution, and makes ferrite carbonization.Manganese can increase austenitic stability, reduces the critical transition temperature of steel.And manganese can also increase the superheated susceptivity of steel, while making thermal treatment, crystal grain is easily grown up, and affects impelling strength.
Phosphorus of the present invention (P) content≤0.025%, sulphur (S) content≤0.015%.Phosphorus has disadvantageous effects such as easily causing segregation, deterioration welding property, the low-temperature impact toughness that significantly reduces steel, raising brittle transition temperature in steel.The easy generation MnS of being combined with manganese of sulphur is mingled with, and sulphur also affects the low-temperature impact toughness of steel.Therefore, the present invention should reduce phosphorus, the disadvantageous effect of element sulphur to rigidity energy as far as possible, by molten iron being carried out to the means such as dark desulfurization pre-treatment, vacuum-treat, controls phosphorus, sulphur content, thereby alleviates its disadvantageous effect.
The present invention selects chromium (Cr) content 0.1～0.5%.Chromium can significantly improve intensity, hardness and wear resistance, can also improve oxidation-resistance and the erosion resistance of steel.
The present invention selects vanadium (V) content 0.01～0.05%.Vanadium is the good reductor of steel.Vanadium in steel can thinning microstructure crystal grain, improves intensity and toughness.The carbide that vanadium and carbon form can improve anti-hydrogen-type corrosion ability under High Temperature High Pressure.It separates out with VC and the small particle of VN in the time of 500 DEG C～700 DEG C of temperature tempering, can play precipitation strength.
Aluminium of the present invention (Al) content 0.05 ~ 0.15%, aluminium is a kind of effectively reductive agent.Aluminium in steel can thinning microstructure crystal grain, improves intensity and toughness.The carbide that vanadium and nitrogen form, separates out with the small particle of Al N, can play precipitation strength.
Nitrogen of the present invention (N) content 0.01 ~ 0.03%, in the time of 590 DEG C, the solubleness maximum of nitrogen in ferrite is about 0.1%, and in room temperature with slightly under high-temperature, nitrogen is gradually with Fe subsequently
4n form is separated out, and the intensity of steel, hardness is improved, plasticity, toughness drop.In addition, molten steel [N] raises, and has aggravated separating out of vanadium nitride, aluminium nitride.
The present invention compared with prior art, is that sectional dimension is 300 х 400mm owing to adopting continuous casting blooms, and open rolling becomes little square billet, then send the technique of high speed wire rolling, makes metallographic structure and the performance of bridge rope steel cable wire rod even thereby obtain, and crystal grain obtains better refinement; In high speed wire rolling process, owing to having adopted the quick process for cooling of controlled rolling temperature, Wind Volume, thereby making the tensile strength >=2000MPa of final bridge rope steel wire and stable, torsion value reaches >=and 15 times, in cold drawing process, not because wire quality problem produces fracture of wire phenomenon.
Brief description of the drawings
Fig. 1 is the metallographic structure figure of bridge rope steel wire rod of the present invention
Fig. 2 is the pearlitic lamella figure of bridge rope steel wire rod of the present invention.
Embodiment
Below the present invention is described in detail:
Table 1 is the value list of various embodiments of the present invention;
Table 2 is the main technologic parameters list of various embodiments of the present invention;
Table 3 is the list of various embodiments of the present invention performance monitoring situation.
Various embodiments of the present invention are produced according to following steps:
Its step:
1) smelt also continuous casting and become base, the cross dimensions of controlling strand is at least 300 х 400mm; Control tundish superheating temperature and be no more than 20 DEG C; Control casting speed at 0.3～0.6m/min; The section draft of controlling after strand is gently depressed is not more than 8.0%;
2) strand is heated, control soaking temperature at 1250～1500 DEG C, control time inside furnace and be not less than 300min;
3) be rolled, control start rolling temperature and be not less than 1200 DEG C; Open rolling becomes cross dimensions to be not more than the square billet of 250 × 250mm;
4) again heat, control soaking temperature not higher than 1050 DEG C, soaking time 100～200 min;
5) carry out high-speed rolling, control roughing start rolling temperature at 900～980 DEG C, control finish rolling start rolling temperature not higher than 850 DEG C;
6) weave silk, control laying temperature and be not less than 920 DEG C;
7) air-cooled to room temperature, control air-cooled line roller table speed extreme difference 1.05～1.12, control speed of cooling at 5～15 DEG C/S;
8) stand-by.
The chemical composition wt% of the each embodiment of table 1 steel of the present invention
| Composition | C | Si | Mn | P | S | Cr | Al | N | V | Cu |
| 1 | 0.95 | 0.16 | 0.8 | 0.014 | 0.012 | 0.1 | 0.098 | 0.019 | 0.05 | 0.03 |
| 2 | 0.975 | 0.1 | 0.9 | 0.011 | 0.010 | 0.2 | 0.148 | 0.023 | 0.02 | 0.02 |
| 3 | 0.99 | 0.27 | 0.6 | 0.008 | 0.005 | 0.3 | 0.13 | 0.021 | 0.04 | 0.015 |
| 4 | 1.1 | 0.38 | 0.75 | 0.017 | 0.006 | 0.4 | 0.072 | 0.015 | 0.03 | 0.017 |
| 5 | 1.2 | 0.48 | 1.0 | 0.010 | 0.008 | 0.5 | 0.05 | 0.013 | 0.01 | 0.021 |
The main technologic parameters list (one) of the each embodiment of table 2 steel of the present invention
The main technologic parameters list (two) of the each embodiment of table 2 steel of the present invention
The test-results of the each embodiment of table 3 steel of the present invention
As can be seen from Table 3, more than the tensile strength of the finished product steel wire of the present invention reaches 2000MPa, the torsion value of steel wire can reach more than 15 times, and it can meet the requirement in market completely.
Above-described embodiment only exemplifies for the best, and is not the restriction to embodiments of the present invention.
Claims (1)
1. the method for wire rod for the bridge cable of production tensile strength >=2000MPa, its step:
1) smelt also continuous casting and become base, the cross dimensions of controlling strand is at least 300 х 400mm; Control tundish superheating temperature and be no more than 20 DEG C; Control casting speed at 0.3～0.6m/min; The section draft of controlling after strand is gently depressed is not more than 8.0%; The component of strand and weight percent content are: C:0.975～1.2%, Si:0.1%～0.48%, Mn:0.6～1.0%, Cr:0.1～0.5%, V:0.01～0.04%, Cu≤0.05%, Al:0.05～0.15%, N:0.019～0.03%, P≤0.025%, S≤0.015%, surplus is Fe and inevitable impurity;
2) strand is heated, control soaking temperature at 1250～1500 DEG C, control time inside furnace and be not less than 300min;
3) be rolled, control start rolling temperature and be not less than 1205 DEG C; Open rolling becomes cross dimensions to be not more than the square billet of 250 × 250mm;
4) again heat, control soaking temperature not higher than 1050 DEG C, soaking time 100～200 min;
5) carry out high-speed rolling, control roughing start rolling temperature at 900～980 DEG C, control finish rolling start rolling temperature not higher than 850 DEG C;
6) weave silk, control laying temperature and be not less than 920 DEG C;
7) air-cooled to room temperature, control air-cooled line roller table speed extreme difference 1.05～1.12, control speed of cooling at 5～15 DEG C/S;
8) stand-by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210473122.3A CN102936688B (en) | 2012-11-21 | 2012-11-21 | Wire with tensile strength>=2000MPa for bridge cable and production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210473122.3A CN102936688B (en) | 2012-11-21 | 2012-11-21 | Wire with tensile strength>=2000MPa for bridge cable and production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102936688A CN102936688A (en) | 2013-02-20 |
| CN102936688B true CN102936688B (en) | 2014-11-19 |
Family
ID=47695609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210473122.3A Active CN102936688B (en) | 2012-11-21 | 2012-11-21 | Wire with tensile strength>=2000MPa for bridge cable and production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102936688B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112807B (en) * | 2015-10-08 | 2017-02-01 | 武汉钢铁(集团)公司 | High-strength bridge cable steel with pearlite inter-lamellar spacing smaller than 150nm and production method |
| CN105624564B (en) * | 2016-01-05 | 2017-10-27 | 江阴兴澄特种钢铁有限公司 | A kind of excellent carbon steel wire rod with high of fine steel cord drawing processing characteristics and manufacture method |
| CN107227427B (en) * | 2017-07-28 | 2019-03-15 | 武汉钢铁有限公司 | 7.0mm2000MPa grades of zinc-coated wires of Φ and its manufacturing method |
| CN107354380B (en) * | 2017-08-30 | 2019-04-09 | 武汉钢铁有限公司 | A kind of tensile strength >=2300MPa bridge cable steel and production method |
| CN107587071B (en) * | 2017-08-30 | 2019-05-24 | 武汉钢铁有限公司 | A kind of tensile strength >=2100MPa bridge cable steel and production method |
| CN109174997A (en) * | 2018-08-14 | 2019-01-11 | 武汉钢铁有限公司 | A kind of production method that can improve Rm >=1860MPa bridge cable coating wire |
| CN109468530B (en) * | 2018-10-17 | 2021-04-06 | 江阴兴澄合金材料有限公司 | Hot-rolled wire rod for galvanized steel wire of bridge cable rope with over 2000MPa level and production method |
| CN110184537B (en) * | 2019-05-24 | 2020-10-30 | 武汉钢铁有限公司 | Low-carbon cobalt-containing high-strength bridge cable steel and production method thereof |
| CN112090956B (en) * | 2020-09-01 | 2023-05-19 | 武汉钢铁有限公司 | Production control method of wire rod for low-segregation high-torsion bridge cable |
| CN114734009B (en) * | 2022-03-23 | 2024-04-02 | 江阴兴澄合金材料有限公司 | Steel wire rod for ultrahigh-strength card clothing and manufacturing method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3409276B2 (en) * | 1997-11-07 | 2003-05-26 | 株式会社神戸製鋼所 | High carbon steel with low heat treatment strain |
| US7462250B2 (en) * | 2003-01-27 | 2008-12-09 | Nippon Steel Corporation | High strength, high toughness, high carbon steel wire rod and method of production of same |
| CN101586208B (en) * | 2008-05-23 | 2011-05-11 | 宝山钢铁股份有限公司 | Ultra-high strength hot rolling wire rod of 2200 Mpa level and manufacture method thereof |
| CN102220545B (en) * | 2010-04-16 | 2013-02-27 | 攀钢集团有限公司 | High-carbon and high-strength heat-treated steel rail with high wear resistance and plasticity and manufacturing method thereof |
| CN102181786A (en) * | 2011-04-25 | 2011-09-14 | 江苏省沙钢钢铁研究院有限公司 | Coil rod used for 1670MPa level bridge cable zinc-coated wire and preparation method of coil rod |
| CN102634730B (en) * | 2012-04-28 | 2014-10-29 | 宝山钢铁股份有限公司 | Steel wire rod for 1860MPa-level bridge cable galvanized steel wire and manufacturing method thereof |
-
2012
- 2012-11-21 CN CN201210473122.3A patent/CN102936688B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| JP特开平11-140581A 1999.05.25 * |
| 徐文雷等.桥梁缆索用超高强度镀锌钢丝的研制.《金属制品》.2010,第36卷(第2期),第28-31页. * |
| 桥梁缆索用超高强度镀锌钢丝的研制;徐文雷等;《金属制品》;20100425;第36卷(第2期);第28-31页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102936688A (en) | 2013-02-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102936688B (en) | Wire with tensile strength>=2000MPa for bridge cable and production method | |
| CN111041372B (en) | Spring steel wire rod with cryogenic drawing performance, spring steel wire, spring and manufacturing method | |
| CN109468530B (en) | Hot-rolled wire rod for galvanized steel wire of bridge cable rope with over 2000MPa level and production method | |
| CN105624564B (en) | A kind of excellent carbon steel wire rod with high of fine steel cord drawing processing characteristics and manufacture method | |
| JP6574307B2 (en) | High toughness seamless steel pipe and manufacturing method thereof | |
| CN102634730B (en) | Steel wire rod for 1860MPa-level bridge cable galvanized steel wire and manufacturing method thereof | |
| CN104046914B (en) | A kind of non-hardened and tempered steel and production technique thereof | |
| CN102352469B (en) | Ultrahigh-strength vanadium-titanium composite microalloyed high carbon steel wire rod and preparation method thereof | |
| CN104032214B (en) | A kind of non-hardened and tempered steel and production technique thereof | |
| CN101768698B (en) | Low cost yield strength 700MPA level non-tempering processing high strength steel plate and manufacturing method thereof | |
| CN107299280A (en) | 2000MPa grades of cable steel wires heat treatment wire rod and production method | |
| CN104032226B (en) | A kind of non-hardened and tempered steel and production technique thereof | |
| CN102416411B (en) | Manufacturing method of directly cold-drawn spring steel wire with excellent fatigue performance | |
| CN105525226A (en) | Martensitic stainless steel wire rod and production method thereof | |
| CN103409682B (en) | The method of high-carbon carbon steel wire production fine steel wire | |
| US20170175221A1 (en) | High-carbon steel wire rod and preparation method therefor | |
| CN104438418A (en) | Rolling method of stainless steel mold cast steel ingot by one-heating forming | |
| CN104745958B (en) | A kind of furniture spring steel wire rod and production method thereof | |
| CN112391584A (en) | Heat treatment wire rod for 2060MPa bridge cable steel wire and production method thereof | |
| CN110983176B (en) | Hot-rolled wire rod for 70 kg-grade welding wire and production method thereof | |
| CN105925899A (en) | Quenched and tempered X52 hydrogen sulfide corrosion resisting seamless line pipe and preparation method thereof | |
| CN105506500A (en) | High-strength coil rod excellent in low-temperature performance and manufacturing method of high-strength coil rod | |
| CN104032224B (en) | A kind of non-hardened and tempered steel and production technique thereof | |
| CN114318149A (en) | Grade 102 steel cord, grade 102 cord steel wire rod and production method thereof | |
| CN102644024B (en) | Low-alloy low-yield-ratio steel for oceaneering structure and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170711 Address after: 430083 Qingshan District, Hubei, Wuhan factory before the door No. 2 Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |