CN101514391B - Production method of high-carbon steel wire capable of improving draw ductility - Google Patents
Production method of high-carbon steel wire capable of improving draw ductility Download PDFInfo
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- CN101514391B CN101514391B CN2009100613601A CN200910061360A CN101514391B CN 101514391 B CN101514391 B CN 101514391B CN 2009100613601 A CN2009100613601 A CN 2009100613601A CN 200910061360 A CN200910061360 A CN 200910061360A CN 101514391 B CN101514391 B CN 101514391B
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Abstract
The invention relates to a production method for high-carbon steel wire capable of improving draw ductility, which solves the disadvantages of the network cementite existing currently such as precipitation and the like. The procedure is a production method of high-carbon steel wire capable of improving draw ductility, and the steps are as follows: high-carbon steel wire continuous casting after smelting is heated to a crystal region temperature of 900 to 1000 DEG C; rough rolling is carried out at the temperature of 900 to 1045 DEG C; precision rolling is carried out at a beginning temperature of 800 to 950 DEG and a finishing temperature of 850 to 1000 DEG C; sizing processing is carried out at a beginning temperature of 900 to 1050 DEG C; after cooling through water, spinning is carried out at a temperature of 850 to 950 DEG C; wind cooling is carried out, and the cooling speed at the temperature of 600 to 950 DEG C is controlled to be 12 to 30 DEG C per second. The method can control serious network cementite and also can control unformed grain boundary cementite so that sorbite and pearlite are the majority of metallurgical structure and the amount of grain boundary cementite is few; therefore, the cold machining performance is good, and the production efficiency and yield are improved.
Description
Technical field
The present invention relates to the production method of carbon steel wire rod with high, specifically belong to the production method that improves the carbon steel wire rod with high draw ductility.
Background technology
In recent years, along with the fast development of automobile, rubber industry and road, bridge construction, high carbon steel steel wire demand is significantly risen, current domestic and international employing hypereutectoid steel wire rod is produced the product of these special important use.Owing to adopt carbon steel wire rod with high to produce steel wire, it is low to have a production cost, and the tangible advantage of economic benefit has obtained promotion and application widely.
Produce the high carbon steel steel wire and will pass through continuous cold drawn distortion, the original wire rod of different diameter is drawn into the monofilament of different size, improve intensity by work hardening.Because wire rod will pass through drawing, bending, torsional deformation in the cold working process, monofilament will bear drawing force and shear-stress, requires wire rod to have good inner quality.
One of important means of control carbon steel wire rod with high quality is that the metallographic structure that control is rolled in the wire rod of back is mainly sorbite and perlite at present, should not produce the crystal boundary cementite network and separate out.In order to prevent that producing the crystal boundary cementite network separates out, take wire rod rolling usually in the high temperature austenite district, the wire rod after rolling also will be through weaving silk lopping, controlled chilling on stelmo line then.But in process of cooling, separating out of crystal boundary cementite network is deleterious, and the place of separating out that fracture place prestige often appears at the crystal boundary cementite appears in wire rod in the drawing process because of making, and separating out of cementite network was very important after therefore control was rolled; Rolling temperature and speed of cooling also influence wire quality, when rolling temperature and speed of cooling matching are bad, cementite network occurs in wire rod.People are in order to solve the problem that the crystal boundary cementite network is separated out in process of cooling, to improve the toughness in its drawing, the technical measures that solve have been proposed, it as Chinese patent application number is " after-roll reinforced cooling process for 82 B wire rod steel strand " patent of 200410155451, disclose: take by air-cooled again after the water-cooled, and suitably regulate air quantity, the speed of cooling of control wire rod is achieved in 3～10 ℃/s method.But the deficiency that exists: the one, how controlled rolling temperature is not proposed; The 2nd, speed of cooling is on the low side, to cementite network in producing to separate out control difficult.Also having the Chinese patent publication number is CN1184718 " a kind of steel wire cord production technique of wire rod " patent documentation, the measure that it is taked: the one, and the roller table speed when strengthening phase transformation; The 2nd, phase transformation place adds the cooling of accessory fan reinforced transformation; The 3rd, regulate the air quantity transverse distribution by minor flaps and make the uniform measure of horizontal cooling stablize the wire rod structure property, obtaining the average sheet interlayer spacing of sorbite is 0.18m, average perlite pelletizing diameter is 8.4m, the tensile strength of wire rod is 1160～1220MPa, with circle poor performance≤40MPa, the even sorbite of poker is organized a kind of steel strand 82B wire rod, and itself and number of patent application are that 200410155451 existence are same not enough.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, provide that a kind of to be used for cold drawing, metallographic structure mainly be sorbite and perlite, the production method that does not have the carbon steel wire rod with high of crystal boundary cementite network, the i.e. new rolling technology method of " cooling is forced in low temperature rolling+roll back ", by speed of cooling before control temperature of carbon steel wire rod with high and the phase transformation when rolling, thereby on technology, reach the control metallographic structure, avoid separating out of cementite network.
Realize the technical measures of above-mentioned purpose
A kind of production method that can improve the carbon steel wire rod with high draw ductility, its step:
1) will be heated to 900～1000 ℃ of crystallizing field temperature through the carbon steel wire rod with high continuously cast bloom after smelting;
2) under 900～1045 ℃ of conditions, carry out roughing;
3) carry out finish rolling, its start rolling temperature is controlled at 800～950 ℃, and finishing temperature is controlled at 850～1000 ℃;
4) carry out sizing processing, its start rolling temperature is controlled at 900～1050 ℃;
5) wear water cooling, under 850～950 ℃ of conditions, weave silk;
6) carry out air-cooled: the speed of cooling of temperature in 600～950 ℃ of intervals is controlled at 12～30 ℃/second.
It is: the finish rolling start rolling temperature is controlled at 845～900 ℃.
It is: the speed of cooling of air-cooled temperature in 600～950 ℃ of intervals is controlled at 15～25 ℃/second.
The present invention also can control crystal boundary cementite not into the net owing to can control serious cementite network, makes that sorbite and perlite account for the overwhelming majority in the metallographic structure, and the crystal boundary carburizing scale of construction is few, so cold-forming property is good, enhances productivity and lumber recovery.
Embodiment
Embodiment 1
Test steel grade: SWRH82A, rolling diameter: φ 12.5mm.Its step:
1) will be heated to 900 ℃ of crystallizing field temperature through the carbon steel wire rod with high continuously cast bloom after smelting;
2) under 900 ℃ of conditions, carry out roughing;
3) carry out finish rolling, its start rolling temperature is controlled at 800 ℃, and finishing temperature is controlled at 850 ℃;
4) carry out sizing processing, its start rolling temperature is controlled at 900 ℃;
5) wear water cooling, under 850 ℃ of conditions, weave silk;
6) carry out air-cooled: the speed of cooling of temperature in 600 ℃ of intervals is controlled at 12 ℃/second.
Embodiment 2
Test steel grade: SWRH82A, rolling diameter: φ 5.5mm.Its step:
1) will be heated to 950 ℃ of crystallizing field temperature through the carbon steel wire rod with high continuously cast bloom after smelting;
2) under 930 ℃ of conditions, carry out roughing;
3) carry out finish rolling, its start rolling temperature is controlled at 845 ℃, and finishing temperature is controlled at 885 ℃;
4) carry out sizing processing, its start rolling temperature is controlled at 945 ℃;
5) wear water cooling, under 870 ℃ of conditions, weave silk;
6) carry out air-cooled: the speed of cooling of temperature in 680 ℃ of intervals is controlled at 15 ℃/second.
Embodiment 3
Test steel grade: SWRH82A, 6.5 millimeters of rolling diameter: φ.Its step:
1) will be heated to 955 ℃ of crystallizing field temperature through the carbon steel wire rod with high continuously cast bloom after smelting;
2) under 965 ℃ of conditions, carry out roughing;
3) carry out finish rolling, its start rolling temperature is controlled at 865 ℃, and finishing temperature is controlled at 895 ℃;
4) carry out sizing processing, its start rolling temperature is controlled at 960 ℃;
5) wear water cooling, under 890 ℃ of conditions, weave silk;
6) carry out air-cooled: the speed of cooling of temperature in 800 ℃ of intervals is controlled at 18 ℃/second.
Embodiment 4
Test steel grade: SWRH82B, 8.0 millimeters of rolling diameter: φ.Its step:
1) will be heated to 975 ℃ of crystallizing field temperature through the carbon steel wire rod with high continuously cast bloom after smelting;
2) under 1005 ℃ of conditions, carry out roughing;
3) carry out finish rolling, its start rolling temperature is controlled at 900 ℃, and finishing temperature is controlled at 950 ℃;
4) carry out sizing processing, its start rolling temperature is controlled at 1000 ℃;
5) wear water cooling, under 915 ℃ of conditions, weave silk;
6) carry out air-cooled: the speed of cooling of temperature in 890 ℃ of intervals is controlled at 25 ℃/second.
Embodiment 5
Test steel grade: SWRH82B, 11.0 millimeters of rolling diameter: φ.Its step:
1) will be heated to 1000 ℃ of crystallizing field temperature through the carbon steel wire rod with high continuously cast bloom after smelting;
2) under 1045 ℃ of conditions, carry out roughing;
3) carry out finish rolling, its start rolling temperature is controlled at 950 ℃, and finishing temperature is controlled at 1000 ℃;
4) carry out sizing processing, its start rolling temperature is controlled at 1050 ℃;
5) wear water cooling, under 950 ℃ of conditions, weave silk;
6) carry out air-cooled: the speed of cooling of temperature in 950 ℃ of intervals is controlled at 30 ℃/second.
Through above-mentioned test steel is tested, do not detect cementite network, its metallographic structure is sorbite and perlite.
Claims (5)
1. production method that can improve the carbon steel wire rod with high draw ductility, it is characterized in that: this carbon steel wire rod with high is the SWRH82A steel, 12.5 millimeters of rolling diameter: φ, its step:
1) will be heated to 900 ℃ of crystallizing field temperature through the carbon steel wire rod with high continuously cast bloom after smelting;
2) under 900 ℃ of conditions, carry out roughing;
3) carry out finish rolling, its start rolling temperature is controlled at 800 ℃, and finishing temperature is controlled at 850 ℃;
4) carry out sizing processing, its start rolling temperature is controlled at 900 ℃;
5) wear water cooling, under 850 ℃ of conditions, weave silk;
6) carry out air-cooled: the speed of cooling of temperature in 600 ℃ of intervals is controlled at 12 ℃/second.
2. production method that can improve the carbon steel wire rod with high draw ductility, it is characterized in that: this carbon steel wire rod with high is the SWRH82A steel, 5.5 millimeters of rolling diameter: φ, its step:
1) will be heated to 950 ℃ of crystallizing field temperature through the carbon steel wire rod with high continuously cast bloom after smelting;
2) under 930 ℃ of conditions, carry out roughing;
3) carry out finish rolling, its start rolling temperature is controlled at 845 ℃, and finishing temperature is controlled at 885 ℃;
4) carry out sizing processing, its start rolling temperature is controlled at 945 ℃;
5) wear water cooling, under 870 ℃ of conditions, weave silk;
6) carry out air-cooled: the speed of cooling of temperature in 680 ℃ of intervals is controlled at 15 ℃/second.
3. production method that can improve the carbon steel wire rod with high draw ductility, it is characterized in that: this carbon steel wire rod with high is the SWRH82A steel, 6.5 millimeters of rolling diameter: φ, its step:
1) will be heated to 955 ℃ of crystallizing field temperature through the carbon steel wire rod with high continuously cast bloom after smelting;
2) under 965 ℃ of conditions, carry out roughing;
3) carry out finish rolling, its start rolling temperature is controlled at 865 ℃, and finishing temperature is controlled at 895 ℃;
4) carry out sizing processing, its start rolling temperature is controlled at 960 ℃;
5) wear water cooling, under 890 ℃ of conditions, weave silk;
6) carry out air-cooled: the speed of cooling of temperature in 800 ℃ of intervals is controlled at 18 ℃/second.
4. production method that can improve the carbon steel wire rod with high draw ductility, it is characterized in that: this carbon steel wire rod with high is the SWRH82B steel, 8.0 millimeters of rolling diameter: φ, its step:
1) will be heated to 975 ℃ of crystallizing field temperature through the carbon steel wire rod with high continuously cast bloom after smelting;
2) under 1005 ℃ of conditions, carry out roughing;
3) carry out finish rolling, its start rolling temperature is controlled at 900 ℃, and finishing temperature is controlled at 950 ℃;
4) carry out sizing processing, its start rolling temperature is controlled at 1000 ℃;
5) wear water cooling, under 915 ℃ of conditions, weave silk;
6) carry out air-cooled: the speed of cooling of temperature in 890 ℃ of intervals is controlled at 25 ℃/second.
5. production method that can improve the carbon steel wire rod with high draw ductility, it is characterized in that: this carbon steel wire rod with high is the SWRH82B steel, 11.0 millimeters of rolling diameter: φ, its step:
1) will be heated to 1000 ℃ of crystallizing field temperature through the carbon steel wire rod with high continuously cast bloom after smelting;
2) under 1045 ℃ of conditions, carry out roughing;
3) carry out finish rolling, its start rolling temperature is controlled at 950 ℃, and finishing temperature is controlled at 1000 ℃;
4) carry out sizing processing, its start rolling temperature is controlled at 1050 ℃;
5) wear water cooling, under 950 ℃ of conditions, weave silk;
6) carry out air-cooled: the speed of cooling of temperature in 950 ℃ of intervals is controlled at 30 ℃/second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100613601A CN101514391B (en) | 2009-03-31 | 2009-03-31 | Production method of high-carbon steel wire capable of improving draw ductility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100613601A CN101514391B (en) | 2009-03-31 | 2009-03-31 | Production method of high-carbon steel wire capable of improving draw ductility |
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| Publication Number | Publication Date |
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| CN101514391A CN101514391A (en) | 2009-08-26 |
| CN101514391B true CN101514391B (en) | 2010-10-27 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019296B (en) * | 2009-09-15 | 2013-07-03 | 鞍钢股份有限公司 | Controlled-cooling method for rolled high carbon steel wire rod |
| CN102259112B (en) * | 2011-04-12 | 2013-04-17 | 首钢总公司 | Method for controlling structural homogeneity of high-carbon steel coil rod for deep drawing of steel wire |
| CN102719651A (en) * | 2012-06-27 | 2012-10-10 | 贵州大学 | Rapid induction heating and air cooling heat treatment process for steel wire |
| CN103667862A (en) * | 2013-11-08 | 2014-03-26 | 张超 | Tough high-carbon steel material for centrifugal pump blades and preparation method thereof |
| CN104841695A (en) * | 2015-05-08 | 2015-08-19 | 中国重型机械研究院股份公司 | Method for rolling high-precision alloy steel wire rod |
| CN114134410A (en) * | 2021-10-08 | 2022-03-04 | 江阴兴澄合金材料有限公司 | Cord steel wire rod suitable for deep drawing and manufacturing method thereof |
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Granted publication date: 20101027 Termination date: 20170331 |