CN104338759A - Control method of annular coarse grains on surface of ultra-low carbon steel hot rolled wire rod - Google Patents
Control method of annular coarse grains on surface of ultra-low carbon steel hot rolled wire rod Download PDFInfo
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- CN104338759A CN104338759A CN201410536409.5A CN201410536409A CN104338759A CN 104338759 A CN104338759 A CN 104338759A CN 201410536409 A CN201410536409 A CN 201410536409A CN 104338759 A CN104338759 A CN 104338759A
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- Prior art keywords
- ultra
- carbon steel
- control method
- low carbon
- rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to a control method of annular coarse grains on the surface of an ultra-low carbon steel hot rolled wire rod, and belongs to the technical field of steel rolling. The technical parameters controlled in hot rolling lie in that the cooling rate of the surface of the ultra-low carbon steel hot rolled wire rod after pre-finish-rolling is controlled to be 2-6 DEG C per second. The temperature of a finish rolling inlet is controlled to be 930-980 DEG C, and the temperature of spinning is controlled to be 940-980 DEG C. The control method has the advantage that the problem that an annular coarse grain structure is formed on the surface layer in the rolling production process of the ultra-low carbon steel hot rolled wire rod is solved. The control method is highly instructive technically, and is suitable for trail-manufacturing and development of ultra-low carbon steel varieties in high speed workshops.
Description
Technical field
The invention belongs to technical field of steel rolling, provide the control method of the annular coarse-grain in a kind of ultra-low-carbon steel gren rod surface.
Background technology
Along with the develop rapidly of high-end Steel Wire Products Industry, the production and processing technology of user and equipment have had larger progress, have also had higher requirement to the raw-material quality of iron and steel simultaneously.Ultra-low-carbon steel gren rod is mainly used in processing and manufacturing and is applied in the high-end products such as the welding wire of communication and electronic information industry, zinc-plated and zinc-plated filament, and its end product is mainly all kinds of communication cable, shielding line and electric capacity pointer etc.Downstream user requires good drawing property to the ultra-low-carbon steel gren rod that it uses, and wire rod poker uniformity and structural homogenity all will be got well, and meet the index request that its ton of steel wire broken rate is less than 1.5 times.
Rolling temperature and the instability of rolling rear water-cool control, can affect structural homogenity and the poker characteristic of gren rod.So the control of operation of rolling temperature and cooldown rate is the key problem of whole rolling cooling control technology, decides the final structure and properties of gren rod.
Summary of the invention
The object of the present invention is to provide the control method of the annular coarse-grain in a kind of ultra-low-carbon steel gren rod surface.Provide Rolling Production process temperature and the control method of rolling rear water-cooling process.Solve the problem that ultra-low-carbon steel gren rod Rolling Production process mesexine produces annular open grain structure.Reduce the wire broken rate of downstream user in drawing processing filament process, technique directiveness is strong, is applicable to trial-production and exploitation that ultra-low-carbon steel kind is carried out in high line workshop.The technical parameter controlled in hot rolling is as follows:
(1) after pre-finish rolling, the cooldown rate on ultra-low-carbon steel gren rod surface controls at 2 DEG C/s ~ 6 DEG C/s.
Cooldown rate decides austenitic decomposition temperature and time, also determine the final structure and properties of gren rod simultaneously.Cooling rate is too fast, and wire rod structural homogenity controls poor, can reduce the plasticity of material, affect drawing property.
(2) entry temperature at finishing controls at 930 DEG C ~ 980 DEG C, and laying temperature controls at 940 DEG C ~ 980 DEG C.
Entry temperature at finishing and laying temperature are the key temperatures points determining that wire rod phase transformation starts, and are follow-uply to organize the temperature controlled key problem of transition process.Control by adjusting water-cooling process after pre-finish rolling, the position of the pre-finish rolling rear water box of reasonable arrangement, optimizes water tank aperture, realizes the stability contorting of entry temperature at finishing and laying temperature.
The invention has the advantages that, can eliminate completely ultra-low-carbon steel gren rod surface annular open grain structure, its structural homogenity be improved significantly, material plasticity and drawing property significantly improve, by Downstream processing use user approve.
Accompanying drawing explanation
Ultra-low-carbon steel gren rod surface texture form when Fig. 1 is entry temperature at finishing 920 DEG C.
Ultra-low-carbon steel gren rod surface texture form when Fig. 2 is entry temperature at finishing 950 DEG C.
Ultra-low-carbon steel gren rod surface texture form when Fig. 3 is entry temperature at finishing 980 DEG C.
Detailed description of the invention
Embodiment 1
Be applied in Shoudu Iron and Steel Co exploitation ultra-low-carbon steel gren rod, concrete steps are:
(1) after pre-finish rolling, the cooldown rate on ultra-low-carbon steel gren rod surface controls at 4 DEG C/s.
(2) entry temperature at finishing and laying temperature all control at 950 DEG C.
Adopt present invention process, the cooldown rate on ultra-low-carbon steel gren rod surface after pre-finish rolling is controlled within the scope of 2 DEG C/s ~ 6 DEG C/s, entry temperature at finishing controls within the scope of 930 DEG C ~ 980 DEG C, laying temperature controls within the scope of 940 DEG C ~ 980 DEG C, can eliminate completely ultra-low-carbon steel gren rod surface annular open grain structure, its structural homogenity be improved significantly.
Claims (1)
1. a control method for the annular coarse-grain in ultra-low-carbon steel gren rod surface, is characterized in that: the technical parameter controlled in hot rolling technology is:
(1) after pre-finish rolling, the cooldown rate on ultra-low-carbon steel gren rod surface controls at 2 DEG C/s ~ 6 DEG C/s;
(2) entry temperature at finishing controls at 930 DEG C ~ 980 DEG C, and laying temperature controls at 940 DEG C ~ 980 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410536409.5A CN104338759A (en) | 2014-10-12 | 2014-10-12 | Control method of annular coarse grains on surface of ultra-low carbon steel hot rolled wire rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410536409.5A CN104338759A (en) | 2014-10-12 | 2014-10-12 | Control method of annular coarse grains on surface of ultra-low carbon steel hot rolled wire rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104338759A true CN104338759A (en) | 2015-02-11 |
Family
ID=52495698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410536409.5A Pending CN104338759A (en) | 2014-10-12 | 2014-10-12 | Control method of annular coarse grains on surface of ultra-low carbon steel hot rolled wire rod |
Country Status (1)
| Country | Link |
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| CN (1) | CN104338759A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112058912A (en) * | 2020-09-09 | 2020-12-11 | 广东韶钢松山股份有限公司 | Ultra-low carbon steel wire rod and steel wire and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03294013A (en) * | 1990-04-13 | 1991-12-25 | Nippon Steel Corp | Method and device for controlling winding temperature on rolling of wire material |
| DE4232916A1 (en) * | 1992-10-02 | 1994-04-14 | Benteler Werke Ag | Assuring a required final temperature of pipes rolled from pipe blooms - with reheating taking place between the descaling unit and the cooling bed |
| CN101311288A (en) * | 2007-05-24 | 2008-11-26 | 宝山钢铁股份有限公司 | Wire rod for producting1770Mpa bridge cable galvanized steel wire and method for manufacturing same |
| CN101327490A (en) * | 2008-06-30 | 2008-12-24 | 武汉钢铁(集团)公司 | Method for producing good-quality high-carbon steel green rod for drawing |
| CN101586182A (en) * | 2009-06-16 | 2009-11-25 | 武汉钢铁(集团)公司 | Method for reducing net level of bearing steel wire rod carbide |
| EP1824617B1 (en) * | 2006-01-10 | 2011-08-24 | SMS Siemag AG | Method for continuous casting and rolling with an increased casting rate and subsequent hot-rolling of relatively thin metal strands, especially steel strands, and continuous casting and rolling device |
| CN102784799A (en) * | 2012-06-15 | 2012-11-21 | 首钢总公司 | Hot rolling method for reducing open grain structures of low-carbon steel wire rod |
| CN103555913A (en) * | 2013-11-07 | 2014-02-05 | 首钢总公司 | Control method for improving plasticity of bearing steel wire rod |
-
2014
- 2014-10-12 CN CN201410536409.5A patent/CN104338759A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03294013A (en) * | 1990-04-13 | 1991-12-25 | Nippon Steel Corp | Method and device for controlling winding temperature on rolling of wire material |
| DE4232916A1 (en) * | 1992-10-02 | 1994-04-14 | Benteler Werke Ag | Assuring a required final temperature of pipes rolled from pipe blooms - with reheating taking place between the descaling unit and the cooling bed |
| EP1824617B1 (en) * | 2006-01-10 | 2011-08-24 | SMS Siemag AG | Method for continuous casting and rolling with an increased casting rate and subsequent hot-rolling of relatively thin metal strands, especially steel strands, and continuous casting and rolling device |
| CN101311288A (en) * | 2007-05-24 | 2008-11-26 | 宝山钢铁股份有限公司 | Wire rod for producting1770Mpa bridge cable galvanized steel wire and method for manufacturing same |
| CN101327490A (en) * | 2008-06-30 | 2008-12-24 | 武汉钢铁(集团)公司 | Method for producing good-quality high-carbon steel green rod for drawing |
| CN101586182A (en) * | 2009-06-16 | 2009-11-25 | 武汉钢铁(集团)公司 | Method for reducing net level of bearing steel wire rod carbide |
| CN102784799A (en) * | 2012-06-15 | 2012-11-21 | 首钢总公司 | Hot rolling method for reducing open grain structures of low-carbon steel wire rod |
| CN103555913A (en) * | 2013-11-07 | 2014-02-05 | 首钢总公司 | Control method for improving plasticity of bearing steel wire rod |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112058912A (en) * | 2020-09-09 | 2020-12-11 | 广东韶钢松山股份有限公司 | Ultra-low carbon steel wire rod and steel wire and preparation method thereof |
| CN112058912B (en) * | 2020-09-09 | 2022-06-10 | 广东韶钢松山股份有限公司 | Ultra-low carbon steel wire rod and steel wire and preparation method thereof |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150211 |