CN104772346B - A kind of method reducing soft state welding wire steel gren rod tensile strength - Google Patents
A kind of method reducing soft state welding wire steel gren rod tensile strength Download PDFInfo
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- CN104772346B CN104772346B CN201510161148.8A CN201510161148A CN104772346B CN 104772346 B CN104772346 B CN 104772346B CN 201510161148 A CN201510161148 A CN 201510161148A CN 104772346 B CN104772346 B CN 104772346B
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- welding wire
- soft state
- thermal insulation
- tensile strength
- state welding
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
-
- 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
- B21B37/46—Roll speed or drive motor control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
A kind of method reducing soft state welding wire steel gren rod tensile strength, belongs to technical field of steel rolling.Take high temperature rolling to control technique, ultralow roller speed and the slow cooling adding a cover thermal insulation cover and control technique.Particularly as follows: final rolling temperature stability contorting is more than 940 DEG C, scope is at 940 980 DEG C；Laying temperature stability contorting is more than 940 DEG C, and scope is at 940 970 DEG C；0.18m/s roller speed controls technique, blower fan sequence closing with adding a cover thermal insulation cover, and thermal insulation cover segmentation is opened.Advantage is, is controlled by roll control and slow cooling, by 360MPa, the tensile strength of soft state welding wire steel gren rod is reduced to no more than 320MPa, and ferrite grain size rank is reduced to no more than 6.5 grades by 8 grades.
Description
Technical field
The invention belongs to technical field of steel rolling, in particular, provide the soft state welding wire of a kind of reduction
Method by steel gren rod tensile strength.
Background technology
Soft state welding wire is mainly used in data communication, electronic information industry and electronic devices and components
Deng field, end product is to the electric conductivity of soft state welding wire product, drawing property, torsion
Performance, mechanical property and welding performance have strict requirements.For mechanical property, it is desirable to
Specification the soft state welding wire product of ￠ 1.0mm-2.0mm scope tensile strength no more than
340MPa, elongation percentage otherwise less than 10%；Specification is at the soft state welding wire of below ￠ 1.0mm
The tensile strength of product no more than 330MPa, elongation percentage otherwise less than 3%.Soft state copper covered steel
Silk Product processing manufacturing enterprise is to ensure the performance indications requirement that its product reaches downstream user, right
The raw material steel gren rod of processing soft state welding wire proposes concrete performance indications
Requirement, gren rod tensile strength no more than 320MPa, elongation percentage however less than 25%, disconnected
Face shrinkage factor however less than 70%.Simultaneously for ensureing the soft state copper covered steel of the following specification of ￠ 1.0mm
Silk product performance index reaches requirement, will increase by one annealing treating process.
Three aspects of the rolling mill practice major control of conventional strand variety steel, first aspect is to rolling
The control of each section of process temperature of process processed；Second aspect is the control to mill speed and dimensional accuracy
System；The third aspect is the control to rate of cooling and retarded cooling process.For there being the line of particular/special requirement
Material product, will innovate on the basis of conventional strand variety steel rolling mill practice and grope, system
Make new rolling mill practice control program, to reaching the Special use requirement of user.
For the reduction of soft state welding wire steel gren rod tensile strength, take is exactly new
Rolling mill practice control program, be different from the roll control technique of conventional strand variety steel.First,
Take is high temperature rolling process control schemes, it is ensured that final rolling temperature stability contorting 940 DEG C with
On, scope is at 940-980 DEG C；Laying temperature stability contorting is more than 940 DEG C, and scope exists
940-970℃；In terms of retarded cooling process control, take ultralow roller speed and add a cover the slow of thermal insulation cover
Cold control technique, it is possible to effectively control the tissue grain size of soft state welding wire steel gren rod
It is not more than 6.5 grades, much smaller than the tissue grain size number of conventional strand variety steel gren rod.
Use above-mentioned innovation rolling mill practice control program, by the scene effective execution to this process program
Ensure with capacity of equipment, it is possible to the tensile strength of soft state welding wire steel gren rod is stable
Control at no more than 320MPa, meet the Special use requirement of user.
Summary of the invention
It is an object of the invention to provide the soft state welding wire steel gren rod of a kind of reduction to resist
The method of tensile strength, applies and rolls at applicable processing soft state welding wire steel gren rod
Production aspect, this technology is suitable for the fields such as online, bar and promotes.
The present invention takes high temperature rolling to control technique, ultralow roller speed and the slow cooling control adding a cover thermal insulation cover
The technical parameter of technique processed, processing step and control is:
A. final rolling temperature stability contorting is more than 940 DEG C, and scope is at 940-980 DEG C；
B. laying temperature stability contorting is more than 940 DEG C, and scope is at 940-970 DEG C；
C.0.18m/s ultralow roller speed and the slow cooling adding a cover thermal insulation cover control technique, 1-6# wind
Office closes, and 7-11# blower fan is opened, aperture 30-100%；2-10 section thermal insulation cover is closed, 1 section
Open with 11-13 section thermal insulation cover, it is ensured that wire rod cooling rate controls stable.
The roll control technique invented by this and slow cooling control technique, are used by soft state welding wire
The tensile strength of steel gren rod is reduced to no more than 320MPa, ferrite crystal grain by 360MPa
Degree rank is reduced to no more than 6.5 grades by 8 grades, has obtained stable application in the industrial production,
Effect is notable, and product is approved by downstream user.
Detailed description of the invention
The present invention can the application when high-speed wire factory produces soft state welding wire steel gren rod.
The high temperature rolling using the present invention controls technique and ultralow roller speed and adds a cover the slow cooling of thermal insulation cover
Control technique, carry out rolling of soft state welding wire steel gren rod in certain large-scale wire production factory
System produce, the control that the gren rod tensile strength produced can be stable at no more than 320MPa,
Ferritic structure grain size number is 6 grades, it is possible to meet adding of soft state welding wire high-end user
Work uses requirement.
Rolling mill practice and the slow cooling Countermeasures taked be:
A. final rolling temperature stability contorting is at 960 DEG C；
B. laying temperature stability contorting is at 960 DEG C；
C.0.18m/s ultralow roller speed and the slow cooling adding a cover thermal insulation cover control technique, 1-6# blower fan
Closing, 7-11# blower fan is opened, aperture 30-100%；2-10 section thermal insulation cover close, 1 section and
11-13 section thermal insulation cover is opened, it is ensured that wire rod cooling rate controls stable.
Subordinate list explanation
Table 1 is tensile strength and the ferritic structure crystal grain of soft state welding wire steel gren rod
Degree rank.
Table 1
| Steel grade | Sample number | Tensile strength Rm/MPa | Ferritic structure grain size/level |
| RTTB | 1 | 310 | 6 |
| RTTB | 2 | 316 | 6.5 |
| RTTB | 3 | 305 | 6 |
| RTTB | 4 | 300 | 5.5 |
Claims (1)
1. the method reducing soft state welding wire steel gren rod tensile strength, it is special
Levying and be, the technical parameter of processing step and control is:
A. final rolling temperature stability contorting is at 940-980 DEG C；
B. laying temperature stability contorting is at 940-970 DEG C；
C. the ultralow roller speed of 0.18m/s and the slow cooling adding a cover thermal insulation cover control technique, 1-6# wind
Office closes, and 7-11# blower fan is opened, aperture 30-100%；2-10 section thermal insulation cover is closed, 1 section
Open with 11-13 section thermal insulation cover, it is ensured that wire rod cooling rate controls stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510161148.8A CN104772346B (en) | 2015-04-07 | 2015-04-07 | A kind of method reducing soft state welding wire steel gren rod tensile strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510161148.8A CN104772346B (en) | 2015-04-07 | 2015-04-07 | A kind of method reducing soft state welding wire steel gren rod tensile strength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104772346A CN104772346A (en) | 2015-07-15 |
| CN104772346B true CN104772346B (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510161148.8A Active CN104772346B (en) | 2015-04-07 | 2015-04-07 | A kind of method reducing soft state welding wire steel gren rod tensile strength |
Country Status (1)
| Country | Link |
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| CN (1) | CN104772346B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857254A (en) * | 2021-09-16 | 2021-12-31 | 湖南华菱湘潭钢铁有限公司 | Production method of ultra-low carbon steel wire rod for copper-clad steel wire |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5146759A (en) * | 1988-09-16 | 1992-09-15 | Toa Steel Co., Ltd. | Method for rapid direct cooling of a hot-rolled wire rod |
| CN1778486A (en) * | 2004-11-17 | 2006-05-31 | 首钢总公司 | After-roll reinforced cooling process for 82B wire rod steel strand |
| CN101665865A (en) * | 2009-10-14 | 2010-03-10 | 首钢总公司 | Structural transformation control method in continuous cooling process of ultra-low-carbon wire rod of square billet |
| CN103240271A (en) * | 2013-04-18 | 2013-08-14 | 首钢总公司 | Production method for reducing dynamic drawing aging of low-carbon steel wire rods |
| CN103469061A (en) * | 2013-09-06 | 2013-12-25 | 鞍钢股份有限公司 | Ultra-low carbon steel wire rod for electric conduction and production method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001335847A (en) * | 2000-05-24 | 2001-12-04 | Nkk Corp | Steel cooling method |
| JP2005270982A (en) * | 2004-03-22 | 2005-10-06 | Jfe Steel Kk | Method for controlling cooling of material to be rolled in hot rolling |
-
2015
- 2015-04-07 CN CN201510161148.8A patent/CN104772346B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5146759A (en) * | 1988-09-16 | 1992-09-15 | Toa Steel Co., Ltd. | Method for rapid direct cooling of a hot-rolled wire rod |
| CN1778486A (en) * | 2004-11-17 | 2006-05-31 | 首钢总公司 | After-roll reinforced cooling process for 82B wire rod steel strand |
| CN101665865A (en) * | 2009-10-14 | 2010-03-10 | 首钢总公司 | Structural transformation control method in continuous cooling process of ultra-low-carbon wire rod of square billet |
| CN103240271A (en) * | 2013-04-18 | 2013-08-14 | 首钢总公司 | Production method for reducing dynamic drawing aging of low-carbon steel wire rods |
| CN103469061A (en) * | 2013-09-06 | 2013-12-25 | 鞍钢股份有限公司 | Ultra-low carbon steel wire rod for electric conduction and production method thereof |
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| Publication number | Publication date |
|---|---|
| CN104772346A (en) | 2015-07-15 |
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Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee before: Capital Iron & Steel General Company |
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