CN111020386A - Hot-rolled wire rod for bridge cable and production process - Google Patents
Hot-rolled wire rod for bridge cable and production process Download PDFInfo
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- CN111020386A CN111020386A CN201911335881.1A CN201911335881A CN111020386A CN 111020386 A CN111020386 A CN 111020386A CN 201911335881 A CN201911335881 A CN 201911335881A CN 111020386 A CN111020386 A CN 111020386A
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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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing 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
- C22C38/42—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
- 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
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
Abstract
The invention relates to the technical field of metallurgy, in particular to a hot-rolled wire rod for bridge cables and a production process, wherein the hot-rolled wire rod comprises the following chemical components in percentage by mass: 0.15 to 0.22 percent of C, 0.30 to 0.40 percent of Si, 0.4 to 0.60 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, less than or equal to 0.035 percent of Cr, 0.01 to 0.04 percent of Ni, less than or equal to 0.2 percent of Cu, less than or equal to 0.1 percent of V, 0.001 to 0.002 percent of B, and the balance of Fe and impurities. The hot-rolled wire rod provided by the invention meets the use requirements of the strength and the impact resistance of the bridge cable after being subjected to link treatment such as wire drawing, hot galvanizing, twisting and the like, improves the safety performance of the bridge cable, has low cost and strong low-temperature impact resistance and corrosion resistance, and can be used as a raw material for the bridge cable in severe cold regions.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a hot-rolled wire rod for bridge cables and a production process thereof.
Background
In recent years, large-scale infrastructure and urbanization have caused a sharp increase in market demand for construction steel materials, of which hot-rolled wire rods are the most demanded. In particular, cables used in bridge construction are generally formed after wire rods are subjected to wire drawing, hot galvanizing, twisting and other links through burning, the tensile strength of the existing hot-rolled wire rods is insufficient in corrosion resistance, the low-temperature resistance is limited, and the safety performance of bridge railing cables is seriously influenced when the hot-rolled wire rods are used in bridge cable construction in severe cold regions.
Disclosure of Invention
The invention aims to solve the technical problem of providing a hot-rolled wire rod for bridge cables and a production process thereof, wherein the hot-rolled wire rod has high tensile strength, good low-temperature resistance and good corrosion resistance.
The invention is realized by the following technical scheme:
the hot-rolled wire rod for the bridge cable comprises the following chemical components in percentage by mass: 0.15 to 0.22 percent of C, 0.30 to 0.40 percent of Si, 0.4 to 0.60 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, less than or equal to 0.035 percent of Cr, 0.01 to 0.04 percent of Ni, less than or equal to 0.2 percent of Cu, less than or equal to 0.1 percent of V, 0.001 to 0.002 percent of B, and the balance of Fe and impurities.
Further, the diameter of the hot-rolled threaded wire rod is 14.0mm, the allowable deviation is +/-0.30, the out-of-roundness is less than or equal to 0.45, the tensile strength is 1260-1380 MPa, the reduction of area is 18-22%, and the sorbite rate is not less than 88%.
The hot-rolled wire rod production process for the bridge cable comprises the following process flows:
firstly, smelting and continuously casting molten steel, wherein 0.15-0.22% of C, 0.30-0.40% of Si, 0.4-0.60% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, less than or equal to 0.035% of Cr, 0.01-0.04% of Ni, less than or equal to 0.2% of Cu, less than or equal to 0.1% of V, 0.001-0.002% of B are added before the smelting end point, forced blowing is carried out by adopting a variable-gun variable-pressure method, the front-stage gun position is 1.3m, and the flow rate is 24000m 3/h; the lance position in the process is 1.4-1.5m, the carbon drawing lance position in the later period is 1.1m, the flow rate is 24000m3/h, and continuous casting is carried out after smelting is finished to obtain a continuous casting blank;
and secondly, feeding the continuous casting billet into a stepping heating furnace, uniformly heating the continuous casting billet in a preheating section, a heating section and a soaking section, gradually heating the continuous casting billet, removing phosphorus through high-pressure water, and then rolling the continuous casting billet in a rolling process to form a wire rod.
Further, the temperature of the continuous casting machine is 1520-.
Further, controlling the slag alkalinity to be more than 3.0 during molten steel smelting;
further, the rolling temperature is controlled, wherein the initial rolling temperature is controlled to be 1030 +/-30 ℃, the pre-finish rolling temperature is controlled to be 950 +/-30 ℃, and the finish rolling temperature is controlled to be 830 +/-30 ℃.
The invention has the advantages of
The hot-rolled wire rod for the bridge cable, which is protected by the invention, ensures that the content of C is within the allowable range, then improves the content of Mn and Si, so that the strength and the toughness of the hot-rolled wire rod are balanced, the alloy Cr, Ni and V are added to further refine crystal grains, the toughness and the impact resistance of the hot-rolled wire rod are improved, the hot-rolled wire rod is ensured to meet the use requirements of the strength and the impact resistance of the bridge cable after being subjected to link treatment such as wire drawing, hot galvanizing and twisting, and the like, and a proper amount of B element is added, so that the consumption of noble alloy elements such as Cr, Ni and V can be reduced on the premise of ensuring the strength and the humanity, the smelting cost is reduced, and the bonding force of grain boundaries can be greatly improved because the alloy elements mainly exist in the grain boundaries in steel structures, have refining effect on impurities such as S, P and the like gathered in the grain boundaries, in addition, a proper amount of Cu is added, so that the corrosion resistance of the material can be improved, the hot-rolled wire rod produced by the method meets the use requirements of the strength and the impact resistance of the bridge cable after being subjected to link treatment such as wire drawing, hot galvanizing, twisting and the like, the safety performance of the bridge cable is improved, the cost is low, and the low-temperature impact resistance and the corrosion resistance are high, so that the material can be used as a raw material for the bridge cable in a severe cold area.
Detailed Description
The hot-rolled wire rod for the bridge cable comprises the following chemical components in percentage by mass: 0.15 to 0.22 percent of C, 0.30 to 0.40 percent of Si, 0.4 to 0.60 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, less than or equal to 0.035 percent of Cr, 0.01 to 0.04 percent of Ni, less than or equal to 0.2 percent of Cu, less than or equal to 0.1 percent of V, 0.001 to 0.002 percent of B, and the balance of Fe and impurities.
Further, the diameter of the hot-rolled threaded wire rod is 14.0mm, the allowable deviation is +/-0.30, the out-of-roundness is less than or equal to 0.45, the tensile strength is 1260-1380 MPa, the reduction of area is 18-22%, and the sorbite rate is not less than 88%.
The hot-rolled wire rod production process for the bridge cable comprises the following process flows:
firstly, smelting and continuously casting molten steel, wherein 0.15-0.22% of C, 0.30-0.40% of Si, 0.4-0.60% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, less than or equal to 0.035% of Cr, 0.01-0.04% of Ni, less than or equal to 0.2% of Cu, less than or equal to 0.1% of V, 0.001-0.002% of B are added before the smelting end point, forced blowing is carried out by adopting a variable-gun variable-pressure method, the front-stage gun position is 1.3m, and the flow rate is 24000m 3/h; the lance position in the process is 1.4-1.5m, the carbon drawing lance position in the later period is 1.1m, the flow rate is 24000m3/h, and continuous casting is carried out after smelting is finished to obtain a continuous casting blank;
and secondly, feeding the continuous casting billet into a stepping heating furnace, uniformly heating the continuous casting billet in a preheating section, a heating section and a soaking section, gradually heating the continuous casting billet, removing phosphorus through high-pressure water, and then rolling the continuous casting billet in a rolling process to form a wire rod.
Further, the temperature of the continuous casting machine is 1520-.
Further, controlling the slag alkalinity to be more than 3.0 during molten steel smelting;
further, the rolling temperature is controlled, wherein the initial rolling temperature is controlled to be 1030 +/-30 ℃, the pre-finish rolling temperature is controlled to be 950 +/-30 ℃, and the finish rolling temperature is controlled to be 830 +/-30 ℃.
The hot-rolled wire rod produced by the process method has the advantages that all indexes meet the national standard requirements, the hot-rolled wire rod has good strength, toughness, ductility and fatigue resistance, and the spot inspection data of each batch are shown in the following table:
because the hot-rolled wire rod for the bridge cable and the production process thereof, which are protected by the invention, ensure that the content of C is within an allowable range, then improve the content of Mn and Si, balance the strength and toughness of the hot-rolled wire rod, add the alloy Cr, Ni and V to further refine grains, improve the toughness and impact resistance of the hot-rolled wire rod, ensure that the hot-rolled wire rod meets the use requirements of the strength and impact resistance of the bridge cable after being subjected to link treatment such as wire drawing, hot galvanizing, twisting and the like, and add a proper amount of B element, can reduce the consumption of noble alloy elements such as Cr, Ni and V and the like on the premise of ensuring the strength and humanity, not only reduces the smelting cost, but also greatly improves the bonding force of grain boundaries because the alloy mainly exists in the grain boundaries in steel structures, has refining effect on impurities such as S, P and the like gathered in the grain boundaries, thereby improving the just-mentioned low-temperature impact resistance, in addition, a proper amount of Cu is added, so that the corrosion resistance of the material can be improved, the hot-rolled wire rod produced by the method meets the use requirements of the strength and the impact resistance of the bridge cable after being subjected to link treatment such as wire drawing, hot galvanizing, twisting and the like, the safety performance of the bridge cable is improved, the cost is low, and the low-temperature impact resistance and the corrosion resistance are high, so that the material can be used as a raw material for the bridge cable in a severe cold area.
In conclusion, the hot-rolled wire rod for the bridge cable and the hot-rolled wire rod produced by the production process method meet the use requirements of the strength and the impact resistance of the bridge cable after being subjected to link treatment such as wire drawing, hot galvanizing, twisting and the like, improve the safety performance of the bridge cable, have low cost and strong low-temperature impact resistance and corrosion resistance, and can be used as a raw material for the bridge cable in severe cold regions.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The hot-rolled wire rod for the bridge cable is characterized by comprising the following chemical components in percentage by mass: 0.15 to 0.22 percent of C, 0.30 to 0.40 percent of Si, 0.4 to 0.60 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, less than or equal to 0.035 percent of Cr, 0.01 to 0.04 percent of Ni, less than or equal to 0.2 percent of Cu, less than or equal to 0.1 percent of V, 0.001 to 0.002 percent of B, and the balance of Fe and impurities.
2. The hot-rolled wire rod for a bridge cable according to claim 1, wherein the hot-rolled threaded wire rod has a diameter of 14.0mm, an allowable deviation of ± 0.30, an out-of-roundness of not more than 0.45, a tensile strength of 1260 to 1380MPa, a reduction of area of 18 to 22%, and a sorbite ratio of not less than 88%.
3. The hot-rolled wire rod production process for the bridge cable is characterized by comprising the following process flows:
firstly, smelting and continuously casting molten steel, wherein 0.15-0.22% of C, 0.30-0.40% of Si, 0.4-0.60% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, less than or equal to 0.035% of Cr, 0.01-0.04% of Ni, less than or equal to 0.2% of Cu, less than or equal to 0.1% of V, 0.001-0.002% of B are added before the smelting end point, forced blowing is carried out by adopting a variable-gun variable-pressure method, the front-stage gun position is 1.3m, and the flow rate is 24000m 3/h; the lance position in the process is 1.4-1.5m, the carbon drawing lance position in the later period is 1.1m, the flow rate is 24000m3/h, and continuous casting is carried out after smelting is finished to obtain a continuous casting blank;
and secondly, feeding the continuous casting billet into a stepping heating furnace, uniformly heating the continuous casting billet in a preheating section, a heating section and a soaking section, gradually heating the continuous casting billet, removing phosphorus through high-pressure water, and then rolling the continuous casting billet in a rolling process to form a wire rod.
4. The process for producing the hot-rolled wire rod for the bridge cable according to claim 3, wherein the temperature of the continuous casting machine is 1520-.
5. The production process of the hot-rolled wire rod for the bridge cable according to claim 3, wherein the slag alkalinity is controlled to be more than 3.0 during smelting of the molten steel.
6. The process for producing the hot-rolled wire rod for the bridge cable according to claim 3, wherein the rolling temperature is controlled such that the initial rolling temperature is controlled to 1030 +/-30 ℃, the pre-finish rolling temperature is controlled to 950 +/-30 ℃, and the finish rolling temperature is controlled to 830 +/-30 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335881.1A CN111020386A (en) | 2019-12-23 | 2019-12-23 | Hot-rolled wire rod for bridge cable and production process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335881.1A CN111020386A (en) | 2019-12-23 | 2019-12-23 | Hot-rolled wire rod for bridge cable and production process |
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| Publication Number | Publication Date |
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| CN111020386A true CN111020386A (en) | 2020-04-17 |
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| CN201911335881.1A Pending CN111020386A (en) | 2019-12-23 | 2019-12-23 | Hot-rolled wire rod for bridge cable and production process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111560558A (en) * | 2020-06-29 | 2020-08-21 | 盐城市联鑫钢铁有限公司 | Process method for reducing steelmaking cost by converting molten iron into molten steel |
| CN112239830A (en) * | 2020-08-31 | 2021-01-19 | 盐城市联鑫钢铁有限公司 | Low-cost high-ductility disc strip for CRB600H and rolling process thereof |
| CN113546962A (en) * | 2021-06-21 | 2021-10-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Production method of corrosion-resistant wire rod for winding steel wire on bridge main cable |
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| CN1385279A (en) * | 2002-05-30 | 2002-12-18 | 燕山大学 | High-toughness welding wire adaptive for low carbon microalloy |
| UA73673C2 (en) * | 2004-02-09 | 2005-08-15 | Res And Production Ltd Liabili | A steel for load-lifting yokes |
| 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 |
| CN106591700A (en) * | 2016-12-05 | 2017-04-26 | 邢台钢铁有限责任公司 | Hot rolled wire rod for high-strength cut steel wires and production method of hot rolled wire rod |
| CN110484677A (en) * | 2019-06-05 | 2019-11-22 | 盐城市联鑫钢铁有限公司 | A kind of high-efficiency steel-smelting process |
-
2019
- 2019-12-23 CN CN201911335881.1A patent/CN111020386A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385279A (en) * | 2002-05-30 | 2002-12-18 | 燕山大学 | High-toughness welding wire adaptive for low carbon microalloy |
| UA73673C2 (en) * | 2004-02-09 | 2005-08-15 | Res And Production Ltd Liabili | A steel for load-lifting yokes |
| 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 |
| CN106591700A (en) * | 2016-12-05 | 2017-04-26 | 邢台钢铁有限责任公司 | Hot rolled wire rod for high-strength cut steel wires and production method of hot rolled wire rod |
| CN110484677A (en) * | 2019-06-05 | 2019-11-22 | 盐城市联鑫钢铁有限公司 | A kind of high-efficiency steel-smelting process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111560558A (en) * | 2020-06-29 | 2020-08-21 | 盐城市联鑫钢铁有限公司 | Process method for reducing steelmaking cost by converting molten iron into molten steel |
| CN112239830A (en) * | 2020-08-31 | 2021-01-19 | 盐城市联鑫钢铁有限公司 | Low-cost high-ductility disc strip for CRB600H and rolling process thereof |
| CN113546962A (en) * | 2021-06-21 | 2021-10-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Production method of corrosion-resistant wire rod for winding steel wire on bridge main cable |
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Application publication date: 20200417 |