CN102409228B - High-strength high-carbon steel wire rod and production method thereof - Google Patents
High-strength high-carbon steel wire rod and production method thereof Download PDFInfo
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- CN102409228B CN102409228B CN201010291415.0A CN201010291415A CN102409228B CN 102409228 B CN102409228 B CN 102409228B CN 201010291415 A CN201010291415 A CN 201010291415A CN 102409228 B CN102409228 B CN 102409228B
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Abstract
The invention provides a high-strength high-carbon steel wire rod and a production method thereof. The high-strength high-carbon steel wire rod comprises the following components by weight percentage: 0.85%-0.90% of C, 0.1%-1.0% of Si, 0.3%-1.0% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S, less than or equal to 0.0010% of Ti and the rest Fe. The production method comprises the following steps of: 1), smelting: preprocessing molten iron, controlling sulfur to be less than 0.005%, and feeding less than or equal to 0.040% of Ti into a convertor, wherein the smelting final-point phosphorus content of the convertor is less than or equal to 0.010%, the final-point molten steel temperature of the convertor is at 1,570-1,680 DEG C, the refining process temperature is at 1,530-1,625 DEG C, and the refining time is for 20-50minutes; 2), continuous casting: adopting a large square ingot for the continuous casting, wherein the tundish molten steel superheating temperature is not more than 30 DEG C; and 3), continuous rolling and wire rod rolling, wherein the diameter of the wire rod is 5.5-8.0mm, the laying temperature is 870-910 DEG C, the sorbite transformation process temperature of the wire rod is controlled at 640-600 DEG C, the transformation time is controlled at 7-12seconds, and the sorbite transformation process average supercooling temperature of the wire rod is controlled at 60-80 DEG C. Due to the adoption of the high-strength high-carbon steel wire rod disclosed by the invention, the tensile strength can reach 1,200 MPa-1,300MPa, and the area reduction index is not less than 30%.
Description
Technical field
The invention belongs to wire rod technical field, relate in particular to a kind of high-strength high-carbon steel wire rod and production method thereof.
Background technology
Along with the development of doughnut industry, for high strength steel cord, by the demand of wire rod, constantly increase.The patent of invention that is entitled as " high-carbon steel wire rod and preparation method thereof (application number: 200910169807.7) " provides a kind of tensile strength more than 1200MPa, face shrinking percentage is in more than 35% high-carbon steel wire rod and preparation technology thereof, this wire rod comprises the basal component such as C, Si, Mn, Cr and V, and Ni, Cu, Al, B, Ti, Nb and Mo etc. may be selected to minute, the Fe and the impurity that also comprise surplus, its preparation technology comprises smelting, casting, rolling and the control cooling working procedure carrying out successively simultaneously.This high-carbon steel wire rod mechanical property is good, and alloying element is less.But from the angle of controlling cost, this patented technology contains the alloying elements such as Cr and V, is unfavorable for improving the competitiveness of product in market.
Summary of the invention
The object of the invention is to overcome the existing deficiency of above prior art, the high-strength high-carbon steel wire rod and the production method thereof that under a kind of condition not increasing alloying constituent, make it have higher tensile strength and reduction of area value are provided.
The present invention realizes like this, the composition weight percent of this high-strength high-carbon steel wire rod is: [C]: 0.85%～0.90%, [Si]: 0.1%～1.0%, [Mn]: 0.3%～1.0%, [P]≤0.015%, [S]≤0.010%, [Ti]≤0.0010%, inevitably impurity is not higher than 0.1%, and all the other are iron.
Composition range of the present invention is set and be the reasons are as follows.
Carbon is to contribute to carry high-intensity element, in order to meet user's requirement of strength, so [C] will be higher than 0.85%.But the angle of controlling from drawing property and the segregation of wire rod carbon of wire rod, [C] will be controlled at below 0.90%.
Silicon is the element with desoxydatoin, must make its content higher than 0.1%, preferably higher than 0.2%.From steel wire drawing performance perspective, [Si] will be controlled at below 1.0%, prevents a large amount of SiO
2the appearance of inclusion.
Manganese has the desoxydatoin identical with silicon, also has the effect of controlling inclusion simultaneously, prevents that " hot-short " phenomenon from occurring.Therefore,, in order to bring into play fully its effect, [Mn] is controlled at more than 0.3% (preferably higher than 0.4%).But [if Mn] surplus can make steel embrittlement, reduce drawing property, therefore [Mn] will be controlled at below 1.0%.Meanwhile, in order to bring into play manganese, control the effect of inclusion, require [Mn] in steel/[S] than being not less than 20.
Phosphorus sulphur is all detrimental impurity element in steel, improving under the condition of wire rod carbon content, for guaranteeing that wire rod has good plasticity, requires wire rod [P]≤0.015%, and [S]≤0.010% is in the situation that not causing other influences, more low better.
Titanium is easy to form titanium with nitrogen and is mingled with in high carbon steel.Because titanium is mingled with, it is a kind of indeformable being mingled with, in the distortion asynchronous with matrix of wire rod drawing process, even make wire rod matrix occur crackle, worsen the drawing property of wire rod, and by the fatigue lifetime of the finished product steel cable of low wire rod and steel cord, reduce the twisting property of wire rod finished product steel bead wire, so its content requirement [Ti]≤0.0010%.
As mentioned above, rest part is iron and inevitable impurity to high-strength high-carbon steel wire rod basal component in the present invention, and these impurity are sneaked into along with starting material etc., also allow, but foreign matter content must not be higher than 0.1%.
The high-strength high-carbon steel wire rod production technique relating in the present invention is as follows: 1) desulfurizing iron pre-treatment, converter smelting and LF refining: require by desulfurizing iron pre-treatment, the sulphur content in molten iron to be controlled to below 0.005%, preferably control to below 0.002%.Converter enters stove molten iron requirement [Ti]≤0.040%, and converter smelting endpoint molten steel phosphorus content requires≤0.010%, adopts double slag process to smelt, to reduce molten steel phosphorus and titanium content.Converter terminal molten steel temperature is controlled at 1570-1680 ℃ of scope.LF refinery practice temperature is controlled within the scope of 1530-1625 ℃, time 20-50 minute.2) continuous casting: adopt the bloom continuous casting of cross dimensions (200-400mm) * (300-500mm) to produce high carbon steel steel billet.In casting process Metal in Tundish superheating temperature, be not more than 30 ℃.3) tandem rolling and rod rolling: continuously cast bloom is produced to the high-carbon steel wire rod of diameter 5.5-8.0mm through tandem rolling and rod rolling.Wire rod laying temperature 870-910 ℃, wire rod sorbite transition process temperature is controlled at 640-600 ℃, fringe time is controlled at 7-12 second, controls the average condensate depression 60-80 ℃ of wire rod sorbite transition process, make wire rod tissue with sorbite for leading and prevent that over-cooling structure from appearring in wire rod.
The high-strength high-carbon steel wire rod produced according to technical solution of the present invention, its tensile strength has improved 40-80Mpa than common 80 grades of wire rods, and reduction of area index is not less than 30%, has met the customer need that tensile strength reaches 1200MPa-1300MPa.
Embodiment
The present invention is further described by the following embodiment.
Table 1 is the chemical composition of embodiment of the present invention high-strength high-carbon steel wire rod, and table 2 is production technique and the performance of embodiment of the present invention high-strength high-carbon steel wire rod.
The chemical composition (Wt%) of table 1 embodiment of the present invention high-carbon steel wire rod
| Embodiment | C | Si | Mn | P | S | Ti |
| 1 | 0.85 | 0.30 | 0.48 | 0.011 | 0.007 | 0.0009 |
| 2 | 0.87 | 0.28 | 0.55 | 0.010 | 0.006 | 0.0005 |
| 3 | 0.90 | 0.25 | 0.52 | 0.012 | 0.005 | 0.0008 |
| Comparative example | 0.81 | 0.25 | 0.49 | 0.017 | 0.011 | 0.0021 |
Production technique and the performance of table 2 embodiment of the present invention high-carbon steel wire rod
Claims (2)
1. the production method of a high-strength high-carbon steel wire rod, the chemical component weight per-cent that it is characterized in that this wire rod is: [C]: 0.85%～0.90%, [Si]: 0.1%～1.0%, [Mn]: 0.3%～0.55%, [P]≤0.015%, [S]≤0.010%, [Ti]≤0.0010%, inevitably impurity is not higher than 0.1%, and all the other are iron;
Production method comprises the following steps: 1) smelt: desulfurizing iron pre-treatment controls to the sulphur content in molten iron below 0.005%, and converter enters stove [Ti]≤0.040%, converter smelting endpoint molten steel phosphorus content≤0.010%; Converter terminal molten steel temperature is 1570-1680 ℃, and LF refining process temperature is 1530-1625 ℃, time 20-50 minute; 2) continuous casting: adopt the bloom continuous casting of cross dimensions (200-400mm) * (300-500mm), casting process Metal in Tundish superheating temperature is not more than 30 ℃; 3) tandem rolling and rod rolling: wire rod diameter 5.5-8.0mm, wire rod laying temperature 870-910 ℃, wire rod sorbite transition process temperature is controlled at 600-640 ℃, fringe time is controlled at 7-12 second, control the average condensate depression 60-80 ℃ of wire rod sorbite transition process, wire rod reduction of area index is not less than 30%, and tensile strength reaches 1200MPa-1300MPa.
2. the production method of high-strength high-carbon steel wire rod according to claim 1, is characterized in that described desulfurizing iron pre-treatment controls to the sulphur content in molten iron below 0.002%.
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| CN201010291415.0A CN102409228B (en) | 2010-09-20 | 2010-09-20 | High-strength high-carbon steel wire rod and production method thereof |
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| CN201010291415.0A CN102409228B (en) | 2010-09-20 | 2010-09-20 | High-strength high-carbon steel wire rod and production method thereof |
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| CN102409228A CN102409228A (en) | 2012-04-11 |
| CN102409228B true CN102409228B (en) | 2014-04-02 |
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| CN105506461A (en) * | 2014-09-26 | 2016-04-20 | 鞍钢股份有限公司 | Wire rod for outer-layer wires of traction steel wire ropes of high-speed elevators and production method thereof |
| CN105986183A (en) * | 2015-02-13 | 2016-10-05 | 鞍钢股份有限公司 | Steel for rubber belt steel wire having ultrahigh breaking force and production method |
| CN106319328A (en) * | 2015-06-16 | 2017-01-11 | 鞍钢股份有限公司 | High-carbon steel wire rod inclusion control method |
| CN109112246B (en) * | 2017-06-26 | 2020-09-01 | 鞍钢股份有限公司 | Production method of steel wire rod for railway elastic strip fastener formed by direct cold bending |
| CN110747386B (en) * | 2019-10-29 | 2022-05-17 | 江苏省沙钢钢铁研究院有限公司 | Easy-to-pull cord steel wire rod and production method thereof |
| CN111979476B (en) * | 2020-06-05 | 2022-05-13 | 鞍钢股份有限公司 | Wire for automobile control line and manufacturing method thereof |
| CN113695386B (en) * | 2021-07-06 | 2023-06-20 | 广西柳钢华创科技研发有限公司 | HRB400E high-speed wire rod threaded steel with same-circle strength fluctuation not greater than 20Mpa and production method thereof |
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| CN101376951A (en) * | 2007-08-28 | 2009-03-04 | 宝山钢铁股份有限公司 | High strength wire rod for bridge stay cable and suspended cable galvanized steel wire, and manufacturing method thereof |
| CN101597713A (en) * | 2009-07-03 | 2009-12-09 | 首钢总公司 | A kind of microalloying SWRH87B gren rod and manufacture method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101481772B (en) * | 2009-02-20 | 2010-10-20 | 武汉钢铁(集团)公司 | High-carbon steel wire for superfine steel wire and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101376951A (en) * | 2007-08-28 | 2009-03-04 | 宝山钢铁股份有限公司 | High strength wire rod for bridge stay cable and suspended cable galvanized steel wire, and manufacturing method thereof |
| CN101597713A (en) * | 2009-07-03 | 2009-12-09 | 首钢总公司 | A kind of microalloying SWRH87B gren rod and manufacture method thereof |
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