CN114571139A - Production process of steel for H08A welding rod for mechanical shelling - Google Patents
Production process of steel for H08A welding rod for mechanical shelling Download PDFInfo
- Publication number
- CN114571139A CN114571139A CN202210206173.3A CN202210206173A CN114571139A CN 114571139 A CN114571139 A CN 114571139A CN 202210206173 A CN202210206173 A CN 202210206173A CN 114571139 A CN114571139 A CN 114571139A
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- Prior art keywords
- speed
- air
- cooling line
- steel
- wire rod
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- 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.)
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Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 15
- 239000010959 steel Substances 0.000 title claims abstract description 15
- 238000003466 welding Methods 0.000 title claims abstract description 12
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 238000009987 spinning Methods 0.000 claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000004321 preservation Methods 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 26
- 229910052742 iron Inorganic materials 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000005554 pickling Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C43/00—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass
- B21C43/02—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass combined with or specially adapted for use in connection with drawing or winding machines or apparatus
- B21C43/04—Devices for de-scaling wire or like flexible work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C9/00—Cooling, heating or lubricating drawing material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention discloses a production process of steel for an H08A welding rod for mechanical shelling, which comprises the following steps: reducing the spinning temperature to 920-; air-cooled line roller speed: the speed of the roller path of the air cooling line is increased, the starting speed is adjusted to be 0.7m/s, the speed is increased by 3 percent, the final speed is 1.2m/s, the stacking thickness of the coil on the air cooling line is reduced, the cooling speed of the wire rod in the range of 900 plus materials at 800 ℃ is accelerated, and the forming speed of the ferric oxide is further reduced; air-cooled line keeps warm and covers and fan air door: opening all the air cooling line heat preservation covers and the air doors of the fan, improving the air circulation speed, accelerating the cooling speed of the wire rod in the interval of 600-3O4The conversion of + Fe avoids the formation of Fe between the FeO layer and the substrate3O4And (3) a layer.
Description
Technical Field
The invention relates to a production process of steel for an H08A welding rod for mechanical shelling.
Background
At present, when a domestic electrode steel bar manufacturer uses H08A electrode steel bar to produce an electrode, because iron oxide scales are attached to the surface of H08A electrode steel bar and cannot fall off completely during drawing, the iron oxide scales on the surface of a raw material must be removed in an acid pickling or abrasive belt grinding mode before drawing, so that lubricating powder can be uniformly attached to the surface of the raw material before drawing, and the problems of large loss of a die and uneven copper plating are solved. According to the production mode, acid washing not only increases the manufacturing cost, but also causes environmental pollution, and the abrasive belt is not beneficial to reducing the cost and cannot meet the development and the requirement of the mechanical shelling technology.
Because H08A belongs to low-carbon low-silicon easy-to-draw steel, the structural composition of surface iron scale has important effect on the protection and the service performance of a wire rod, particularly, the wire rod is taken as a welding rod link in downstream fine drawing, if mechanical shelling can be realized, i.e. acid washing or abrasive belt grinding is not needed, the iron oxide can be ensured only by mechanical deformationThe skin completely falls off, so that the manufacturing cost can be effectively reduced, and the phenomenon that the iron scale carries lubricating powder and remains in the welding rod to influence the product quality can be avoided. By analyzing the formation mechanism and the structural abnormality reason of the iron scale, under the slow cooling process, the parent metal structure is P + F, thicker iron scale is formed on the surface, the iron scale structure is normally three layers, the inner layer is loose FeO, and the middle layer is compact Fe3O4The outermost layer being columnar crystalline Fe2O3. In the actual production process, the parent metal with the diameter of 6.5mm is mechanically deformed and is drawn to the diameter of 2.5mm, the iron scale with the thickness of 4-6 microns is seen to be left on the surface and is the innermost layer of the surface of the parent metal, the observation and analysis are carried out through an optical microscope, the four-layer structure of the iron scale on the surface of the wire rod is seen, and an additional layer of the oxide layer with the thickness of 4-6 microns is formed between the normal iron scale and the matrix. The iron scale is a high-temperature oxidation product and obeys the parabolic oxidation law in a high-temperature region. Below 570 ℃, the oxidation rate is slow and a structural transformation mainly takes place, namely FeO → Fe3O4+ Fe. The thin layer with a thickness of 4-6 μm on the surface of the sample is Fe generated by FeO decomposition at a temperature below 570 DEG C3O4The steel surface is difficult to remove in the mechanical deformation process, easy adhesion or pressing in causes the unable normal adhesion lubricating powder of iron scale department, aggravates the grinding apparatus damage, and the uneven obvious colour difference of copper facing appears in the copper facing link, can't satisfy the demand that machinery was shelled.
Disclosure of Invention
The invention aims to provide a production process of steel for an H08A welding rod for mechanical shelling, which can completely strip surface oxide skin and effectively reduce the manufacturing cost.
The invention adopts the technical scheme that a production process of steel for H08A welding rods for mechanical shelling,
(1) spinning temperature: reducing the spinning temperature to 920-;
(2) air-cooled line roller speed: the speed of the roller path of the air cooling line is increased, the starting speed is adjusted to be 0.7m/s, the speed is increased by 3 percent, the final speed is 1.2m/s, the stacking thickness of the coil on the air cooling line is reduced, the cooling speed of the wire rod in the range of 900 plus materials at 800 ℃ is accelerated, and the forming speed of the ferric oxide is further reduced;
(3) air-cooled line keeps warm and covers and fan air door: opening all the air cooling line heat preservation covers and the air doors of the fan, improving the air circulation speed, accelerating the cooling speed of the wire rod in the interval of 600-3O4The conversion of + Fe avoids the formation of Fe between the FeO layer and the substrate3O4And (3) a layer.
The invention has the following effects: under the condition that the rolling process is not changed, through the practice of the rapid cooling process mode, the H08A welding wire steel has good performance during mechanical shelling, the iron oxide scale completely falls off, the copper plating is uniform and has no color difference, the tensile strength is less than 400MPa, the performance requirement is met, and the production requirement of mechanical shelling is completely met. The invention is suitable for the production process improvement of wire rod products in mechanical shelling process, can be popularized to the production practice of wire rod products in various domestic steel mills, has wide application prospect, and plays a better promoting role in the improvement of various rod wire products in the new mechanical shelling process.
Detailed Description
A production process of steel for an H08A welding rod for mechanical shelling,
(4) spinning temperature: reducing the spinning temperature to 920-;
(5) air-cooled line roller speed: the speed of the roller path of the air cooling line is increased, the starting speed is adjusted to be 0.7m/s, the speed is increased by 3 percent, the final speed is 1.2m/s, the stacking thickness of the coil on the air cooling line is reduced, the cooling speed of the wire rod in the range of 900 plus materials at 800 ℃ is accelerated, and the forming speed of the ferric oxide is further reduced;
air-cooled line keeps warm and covers and fan air door: opening all the air cooling line heat preservation covers and the air doors of the fan, improving the air circulation speed, accelerating the cooling speed of the wire rod in the interval of 600-3O4The conversion of + Fe avoids the formation of Fe between the FeO layer and the substrate3O4And (3) a layer.
Example (b):
(1) the production process is formulated as follows:
(2) and trial-manufacturing a finished product by the method, performing a drawing test on the off-line product, and checking the conditions of falling and tensile strength.
(3) Determining a production process: the spinning temperature is 920-; the starmol air-cooled linear roller way starting speed is 0.7m/s, the incremental speed is 3 percent, and the final speed is 1.2 m/s; and (4) opening all the air cooling line heat preservation covers, opening air doors of the No. 1-No. 18 fans, and not opening the fans.
(4) Tracking downstream customer usage: by using the product under the new process, a downstream welding rod manufacturer can completely peel off the surface iron oxide scale completely through mechanical deformation in the wire drawing stage under the condition of not pickling the base material and polishing the abrasive belt, the copper plating is uniform and has no color difference, the process requirement of mechanical peeling is completely met, and the effect performance is good.
Claims (1)
1. A production process of steel for an H08A welding rod for mechanical shelling is characterized by comprising the following steps:
1) spinning temperature: reducing the spinning temperature to 920-;
2) speed of the air cooling line roller way: the speed of the roller path of the air cooling line is increased, the starting speed is adjusted to be 0.7m/s, the speed is increased by 3 percent, the final speed is 1.2m/s, the stacking thickness of the coil on the air cooling line is reduced, the cooling speed of the wire rod in the range of 900 plus materials at 800 ℃ is accelerated, and the forming speed of the ferric oxide is further reduced;
3) air-cooled line keeps warm and covers and fan air door: opening all the air cooling line heat preservation covers and the air doors of the fan, improving the air circulation speed, accelerating the cooling speed of the wire rod in the interval of 600-3O4The conversion of + Fe avoids the formation of Fe between the FeO layer and the substrate3O4And (3) a layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210206173.3A CN114571139A (en) | 2022-03-04 | 2022-03-04 | Production process of steel for H08A welding rod for mechanical shelling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210206173.3A CN114571139A (en) | 2022-03-04 | 2022-03-04 | Production process of steel for H08A welding rod for mechanical shelling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114571139A true CN114571139A (en) | 2022-06-03 |
Family
ID=81776271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210206173.3A Pending CN114571139A (en) | 2022-03-04 | 2022-03-04 | Production process of steel for H08A welding rod for mechanical shelling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114571139A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415314A (en) * | 2022-09-14 | 2022-12-02 | 新疆八一钢铁股份有限公司 | Controlled cooling process beneficial to surface scale peeling in drawing process of wire-drawing steel |
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2022
- 2022-03-04 CN CN202210206173.3A patent/CN114571139A/en active Pending
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