CN110722330A - Production method of ultra-low carbon steel wire rod for electric conduction - Google Patents
Production method of ultra-low carbon steel wire rod for electric conduction Download PDFInfo
- Publication number
- CN110722330A CN110722330A CN201911049465.5A CN201911049465A CN110722330A CN 110722330 A CN110722330 A CN 110722330A CN 201911049465 A CN201911049465 A CN 201911049465A CN 110722330 A CN110722330 A CN 110722330A
- Authority
- CN
- China
- Prior art keywords
- ultra
- low carbon
- wire rod
- carbon steel
- electric conduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a method for producing an ultra-low carbon steel wire rod for electric conduction, which adopts a brand new process flow of slab continuous casting → cutting into square billets → rolling into wire rods at high speed, breaks through the production problems of poor castability, easy breaking casting, casting blank bubbles, central shrinkage cavity and the like inherent in the traditional ultra-low carbon continuous casting square billets, eliminates the problems of surface scabbing and the like of the wire rods caused by the production problems, establishes the process flow of the ultra-low carbon steel wire rod for electric conduction, and can better meet the use requirements of users.
Description
Technical Field
The invention relates to a method for producing a wire rod, and particularly belongs to a method for producing an ultra-low carbon steel wire rod for electric conduction.
Background
The copper-clad steel bimetallic wire is formed by using high-quality low-carbon and ultra-low-carbon steel as a core substrate and processing the steel by a series of production processes such as drawing, copper plating and the like, integrates the strength and toughness of steel and the electric conduction and high-frequency characteristics of copper, and is an optimal novel dual-alloy wire for replacing a pure copper wire. The ultra-low carbon steel wire rod for electric conduction is a raw material for producing a copper clad steel bimetallic wire core, and the ultra-low carbon, low silicon, low manganese, low sulfur and other component characteristics of the steel for electric conduction and the requirements of high electric conductivity and high drawing performance of a user make the steel for electric conduction have high quality control difficulty in a traditional square billet production mode.
The ultra-low carbon steel for electric conduction adopts an Al deoxidation process, the molten steel has poor liquidity, a water gap is easy to block, the continuous casting furnace is low or the casting is broken, and meanwhile, the casting blank is easy to generate casting blank quality problems such as central shrinkage cavity, subcutaneous bubbles and the like. At present, the production of the steel mostly adopts a process route combining LF + RH duplex refining and bloom continuous casting, the production process route has long production period and high cost, and the performance requirement of high conductivity of a user cannot be met.
The production problems of poor castability, long period, subcutaneous bubbles of casting blanks, central shrinkage cavity, large-particle inclusions and the like exist in the traditional square billet production process: if the ultra-low carbon steel is smelted only by RH vacuum treatment, only the components of the molten steel are ensured, but the castability of the molten steel is poor, one furnace of steel is difficult to be cast in each casting time, large-scale production cannot be formed, the purity of the molten steel is not high, the yield is low, and the consumption cost of refractory materials is increased; if the LF furnace is added to produce reducing slag and the molten steel is subjected to calcium treatment, the castability and multi-furnace continuous casting of the molten steel can be ensured, but the production period is long, and the calcium treatment process also obviously reduces the conductivity of the cable steel, so that the components in the steel are difficult to control to the component range required by the use of the conductive ultra-low carbon steel wire rod.
Disclosure of Invention
Based on the defects of the prior art, the technical problem to be solved by the invention is to provide the method for producing the conductive ultra-low carbon steel wire rod, which can obviously improve the castability and the casting blank quality and ensure the drawing performance and the conductive performance of the wire rod under the condition of not reducing the purity of molten steel.
In order to solve the technical problems, the invention provides a production method of an ultra-low carbon steel wire rod for electric conduction, which comprises the following steps:
(1) producing a casting blank with the thickness of a plate blank being less than or equal to 230mm by adopting smelting ultra-low carbon steel for electric conduction and a plate blank production process;
(2) the production process flow adopts a converter → RH refining → slab continuous casting;
(3) cutting the plate blank by adopting flame longitudinal cutting and cleaning technology;
(4) rolling into wire rods.
Preferably, the method for producing the ultra-low carbon steel wire rod for electric conduction further comprises the following technical characteristics:
as an improvement of the technical scheme, the RH refining time in the step (2) is less than or equal to 35 min.
As an improvement of the technical scheme, in the slab continuous casting production in the step (2), the oxygen content is controlled to be less than or equal to 70ppm, the superheat degree is 20-35 ℃, and the continuous casting heat is more than or equal to 20 furnaces.
As an improvement of the above technical solution, the section size of the square billet cut in the slab cutting process in step (3) is preferably: 230X 230mm, 210X 210mm, 200X 200mm or 180X 180 mm.
As an improvement of the technical scheme, the wire rod with the diameter of 6.5 mm-17.0 mm is rolled in the step (4).
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: the invention changes the production mode of the ultra-low carbon steel wire rod for electric conduction from the traditional square billet process to the slab continuous casting → slab cutting to square billet → high-speed wire rolling process, solves the problems of low continuous casting furnace or broken casting, central shrinkage cavity of casting blank, subcutaneous air bubble, large particle inclusion of wire rod, surface scab and the like in the ultra-low carbon steel for electric conduction in the square billet production, has less smelting process and short period, can improve the production efficiency, reduce the production cost, and simultaneously ensures the surface quality and the electric conduction performance of the wire rod. The process has a wide trial range, and provides reference experience for the development of wire rods produced by the plate blank.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the contents of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following detailed description is given in conjunction with the preferred embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 shows the quality of a billet produced in comparative example 1;
fig. 2 shows the quality of the slabs produced in example 1 of the present invention.
Detailed Description
Other aspects, features and advantages of the present invention will become apparent from the following detailed description, which, when taken in conjunction with the drawings, illustrate by way of example the principles of the invention.
Table 1 shows the process routes and key processes of the examples and comparative examples of the present invention;
table 2 shows the process parameters and the casting blank quality in the continuous casting process of each example and comparative example of the present invention;
table 3 shows a comparison of the quality indexes of the examples of the present invention and the comparative examples.
In each embodiment of the invention, the key process control steps are as follows:
(1) the ultra-low carbon steel wire rod for electric conduction smelting adopts a slab production process, and the slab thickness is less than or equal to 230mm in order to ensure the surface and internal quality of a casting blank and the quality of a cutting blank.
(2) The production process flow adopts a converter → RH refining → slab continuous casting, and does not need LF and calcium treatment technology and a two-fire cogging process, and the process flow is short, and the refining time is less than or equal to 35 min.
Wherein, the oxygen content in the continuous casting production is controlled to be less than or equal to 70ppm, the castability is ensured, the inclusion content in the molten steel is reduced, the lower superheat degree is controlled, the superheat degree is 20-35 ℃, and the continuous casting heat is more than or equal to 20 furnaces.
(3) The plate blank cutting adopts flame longitudinal cutting and cleaning technology, so that the defects of slag inclusion and the like in the steel billet are quickly cleaned by utilizing the gas cutting and melting removing functions of high-temperature flame while the longitudinal cutting section is ensured to be flat, and the high surface quality requirement of the wire rod is ensured. The size of the cross-section cut into the square billet depends on the thickness of the slab and is generally: 230X 230mm, 210X 210mm, 200X 200mm, 180X 180 mm.
(4) Rolling into wire rods with the diameter of 6.5 mm-17.0 mm for later use.
Table 1 Process flow wt%
| Production plant | Production process | Refining process | Refining period | Casting blank cross section |
| Example 1 | Square blank cutting process for plate blank | RH | 25 | 180×930mm→180×180mm |
| Example 2 | Square blank cutting process for plate blank | RH | 28 | 200×1030mm→200×200mm |
| Example 3 | Square blank cutting process for plate blank | RH | 30 | 210×860mm→210×210mm |
| Example 4 | Square blank cutting process for plate blank | RH | 32 | 210×1080mm→210×210mm |
| Example 5 | Square blank cutting process for plate blank | RH | 33 | 230×950mm→230×230mm |
| Example 6 | Square blank cutting process for plate blank | RH | 35 | 230×1180mm→230×230mm |
| Comparative example | Bloom second firing process | LF+RH | 45 | 320×425mm→150*150mm |
TABLE 2 Process parameters and quality of the cast blanks in the continuous casting Process
TABLE 3 wire rod Performance and application comparison
| Item | Rm，MPa | Electrical conductivity of | Inclusions, grade | Filament breakage rate, times/ton |
| Example 1 | 260 | 16.0 | B0.5D0.5 | 0 times per ton |
| Example 2 | 265 | 16.2 | B1.0D0.5 | 0.5 times/ton |
| Example 3 | 270 | 16.5 | B0.5D1.0 | 0.8 times per ton |
| Example 4 | 275 | 16.7 | B1.5D0.5 | 1.0 times/ton |
| Example 5 | 280 | 16.9 | B1.0D1.0 | 1.2 times/ton |
| Example 6 | 285 | 17.2 | C0.5D0.5 | 1.5 times/ton |
| Comparative example | 315 | 16.0 | B2.0C1.5D1.5 | 5 times per ton |
The surface quality, the mechanical property and the conductivity of the ultra-low carbon steel wire rod for electric conduction produced according to the steps meet the use requirements of users: the electric conductivity is more than or equal to 16.0 percent, the tensile strength is less than 350MPa, the elongation is more than or equal to 30 percent, the high-quality copper-clad steel wire can be produced, and the production cost of users can be reduced. The invention has stable production control process, excellent product quality, steel purity, low tensile strength of the wire rod and high conductivity, and meets the use requirement of ultra-low carbon steel for electric conduction.
FIG. 1 shows the quality of a square billet of a comparative example: the center of the square billet is provided with an obvious central shrinkage hole, and simultaneously, the edge of the billet is provided with subcutaneous bubbles, so that the quality of the casting blank can influence the surface defects such as scabbing and the like generated during later-stage wire rod rolling; if impurities exist in the central shrinkage cavity part, rolling can not be carried out; if no impurities exist, rolling can be carried out, but the limit specification of a user during drawing is influenced;
fig. 2 shows the quality of the slabs produced in example 1: the slab is low-power, and has no phenomena of central shrinkage cavity, subcutaneous bubbles and the like, and the equiaxed crystal rate is far greater than that of a square slab. The low-power quality of the plate blank is obviously superior to that of the square billet.
The ultra-low carbon steel wire rod for electric conduction is produced by adopting a brand new process flow of slab continuous casting → cutting into square billets → rolling into wire rods through high-speed lines, the production problems of poor castability, easy breaking casting, subcutaneous bubbles of casting blanks, central shrinkage holes and the like inherent in the traditional ultra-low carbon continuous casting square billets are solved, the problems of surface scabbing and the like of the wire rods caused by the production problems are solved, the process flow of the ultra-low carbon steel wire rod for electric conduction is established, the ultra-low carbon steel wire rod for electric conduction produced by adopting the process has good surface quality, high electric conductivity and good drawing performance, and the use requirements of users are better met.
The raw materials listed in the invention, the upper and lower limits and interval values of the raw materials of the invention, and the upper and lower limits and interval values of the process parameters (such as temperature, time and the like) can all realize the invention, and the examples are not listed.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (5)
1. The production method of the ultra-low carbon steel wire rod for electric conduction is characterized by comprising the following steps:
(1) producing a casting blank with the thickness of a plate blank being less than or equal to 230mm by adopting smelting ultra-low carbon steel for electric conduction and a plate blank production process;
(2) the production process flow adopts a converter → RH refining → slab continuous casting;
(3) cutting the plate blank by adopting flame longitudinal cutting and cleaning technology;
(4) rolling into wire rods.
2. The method for producing an ultra-low carbon steel wire rod for electric conduction as set forth in claim 1, wherein: the RH refining time in the step (2) is less than or equal to 35 min.
3. The method for producing an ultra-low carbon steel wire rod for electric conduction as set forth in claim 1, wherein: in the step (2), the oxygen content of the plate blank in the continuous casting production is controlled to be less than or equal to 70ppm, the superheat degree is 20-35 ℃, and the continuous casting heat number is more than or equal to 20 furnaces.
4. The method for producing an ultra-low carbon steel wire rod for electric conduction as set forth in claim 1, wherein: the section size of the square billet cut in the slab cutting process in the step (3) is preferably as follows: 230X 230mm, 210X 210mm, 200X 200mm or 180X 180 mm.
5. The method for producing an ultra-low carbon steel wire rod for electric conduction as set forth in claim 1, wherein: and (4) rolling into the wire rod with the diameter of 6.5-17.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911049465.5A CN110722330A (en) | 2019-10-31 | 2019-10-31 | Production method of ultra-low carbon steel wire rod for electric conduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911049465.5A CN110722330A (en) | 2019-10-31 | 2019-10-31 | Production method of ultra-low carbon steel wire rod for electric conduction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110722330A true CN110722330A (en) | 2020-01-24 |
Family
ID=69222608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911049465.5A Pending CN110722330A (en) | 2019-10-31 | 2019-10-31 | Production method of ultra-low carbon steel wire rod for electric conduction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110722330A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112589225A (en) * | 2020-11-11 | 2021-04-02 | 鞍钢股份有限公司 | Cutting method for reducing accident rate of rolling of conductive steel wire rod |
| CN113275530A (en) * | 2021-04-23 | 2021-08-20 | 包头钢铁（集团）有限责任公司 | Production method for reducing warping, rooting and scabbing of high-carbon hard wire rod |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11347602A (en) * | 1998-06-10 | 1999-12-21 | Tokai Kogyo Kk | Continuous rolling method |
| CN101691644A (en) * | 2009-07-11 | 2010-04-07 | 山西太钢不锈钢股份有限公司 | Nonmagnetic soft stainless steel wire rod or stainless steel plate and method of manufacturing same |
| CN102899554A (en) * | 2012-10-23 | 2013-01-30 | 鞍钢股份有限公司 | Annealing-free low-carbon steel wire rod and production method thereof |
| 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 |
| CN104745925A (en) * | 2015-04-03 | 2015-07-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Phi5.3mm 72A wire rod and preparation method thereof |
| CN107675068A (en) * | 2017-09-27 | 2018-02-09 | 武汉钢铁有限公司 | The production method of superfine welding wire steel wire rod |
| CN110252976A (en) * | 2019-06-26 | 2019-09-20 | 武汉钢铁有限公司 | A method of improving high-carbon hypereutectoid bridge cable wire rod Central Carbon Segregation |
-
2019
- 2019-10-31 CN CN201911049465.5A patent/CN110722330A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11347602A (en) * | 1998-06-10 | 1999-12-21 | Tokai Kogyo Kk | Continuous rolling method |
| CN101691644A (en) * | 2009-07-11 | 2010-04-07 | 山西太钢不锈钢股份有限公司 | Nonmagnetic soft stainless steel wire rod or stainless steel plate and method of manufacturing same |
| CN102899554A (en) * | 2012-10-23 | 2013-01-30 | 鞍钢股份有限公司 | Annealing-free low-carbon steel wire rod and production method thereof |
| 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 |
| CN104745925A (en) * | 2015-04-03 | 2015-07-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Phi5.3mm 72A wire rod and preparation method thereof |
| CN107675068A (en) * | 2017-09-27 | 2018-02-09 | 武汉钢铁有限公司 | The production method of superfine welding wire steel wire rod |
| CN110252976A (en) * | 2019-06-26 | 2019-09-20 | 武汉钢铁有限公司 | A method of improving high-carbon hypereutectoid bridge cable wire rod Central Carbon Segregation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112589225A (en) * | 2020-11-11 | 2021-04-02 | 鞍钢股份有限公司 | Cutting method for reducing accident rate of rolling of conductive steel wire rod |
| CN113275530A (en) * | 2021-04-23 | 2021-08-20 | 包头钢铁（集团）有限责任公司 | Production method for reducing warping, rooting and scabbing of high-carbon hard wire rod |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112359277A (en) | Control method for segregation and net carbon of 86-level high-strength cord steel wire rod | |
| AU2012101967A4 (en) | Combined furnace system for fire refining red impure copper | |
| KR102679132B1 (en) | Production method of ultra-fine ultra-high strength steel wire, wire rod and wire rod | |
| CN103924030B (en) | Smelting method of ultra-low oxygen pure steel | |
| CN110722330A (en) | Production method of ultra-low carbon steel wire rod for electric conduction | |
| CN102776379A (en) | Electroslag remelting slag system and its application | |
| CN101543838A (en) | Method for manufacturing steel wire rod for pipe line steel submerged arc welding wire | |
| CN111992686B (en) | Aerial fog full-water combined cooling high-carbon steel continuous casting production method | |
| CN100371477C (en) | Copper alloy electroslag remelting process | |
| CN115351460A (en) | High-strength rare earth aluminum alloy welding wire and preparation method thereof | |
| CN110616293B (en) | Method for adding rare earth into molten steel | |
| CN111394602A (en) | High-quality aluminum alloy and preparation method thereof | |
| CN109022661B (en) | Method for reducing heavy rail steel rail damage rate | |
| US20210331929A1 (en) | Device and method for producing high-purity industrial silicon | |
| CN101474663B (en) | Preparation method of silver-bearing copper pole | |
| CN102145380B (en) | Method for continuously casting clean molten steel in tundish | |
| CN110666124A (en) | Method for producing cold forging steel at high drawing speed | |
| CN103266236A (en) | Production process of high-quality aluminum alloy material | |
| CN114535555B (en) | Method for reducing erosion rate of ladle slag line in production of deformed steel bar | |
| CN114000033B (en) | Smelting method of electrode bar base material and application of electrode bar base material in electroslag remelting G20Cr2Ni4E steel | |
| CN113817968B (en) | Continuous casting production method for square billet of medium-carbon high-aluminum steel | |
| CN112126735A (en) | Production process of high-strength finish-rolled threaded steel billet | |
| CN111570782A (en) | Continuous casting submersed nozzle | |
| CN102021263A (en) | Method for producing medium carbon alloy steel by melting and continuous casting in converter | |
| CN110951940A (en) | Method for continuously casting nickel-based alloy by large-size round billet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200124 |
|
| RJ01 | Rejection of invention patent application after publication |