CN111647811A - Welding wire steel wire rod suitable for pickling-free shelling process and production method - Google Patents
Welding wire steel wire rod suitable for pickling-free shelling process and production method Download PDFInfo
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- CN111647811A CN111647811A CN202010474568.2A CN202010474568A CN111647811A CN 111647811 A CN111647811 A CN 111647811A CN 202010474568 A CN202010474568 A CN 202010474568A CN 111647811 A CN111647811 A CN 111647811A
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- wire rod
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- steel
- welding wire
- billet
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 34
- 239000010959 steel Substances 0.000 title claims abstract description 34
- 238000003466 welding Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 57
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052742 iron Inorganic materials 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000009987 spinning Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000009749 continuous casting Methods 0.000 claims abstract description 7
- 239000011574 phosphorus Substances 0.000 claims abstract description 7
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 239000002253 acid Substances 0.000 abstract description 6
- 238000005554 pickling Methods 0.000 abstract description 6
- 239000011572 manganese Substances 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000005491 wire drawing Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910000754 Wrought iron Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3073—Fe as the principal constituent with Mn as next major constituent
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a welding wire steel wire rod suitable for an acid-washing-free shelling process and a production method thereof. The steel contains C: 0.05-0.15%, Si: 0.15% -1.15%, Mn: 1.40 to 1.90 percent of iron, less than or equal to 0.025 percent of S, less than or equal to 0.025 percent of P, and the balance of iron and inevitable impurities. Heating the continuous casting billet for 3-3.5 h, and removing phosphorus from the billet by high-pressure water after the billet is discharged from the furnace, wherein the phosphorus removal water pressure is 18-22 MPa; controlling the spinning temperature of the wire rod to be 900-950 ℃; after air cooling, the speed of the roller way is controlled to be 0.2-0.4 m/s, the temperature of the wire rod out of the cover cap is 570-600 ℃, the thickness of the scale of the wire rod is 30-40 mu m, and the phase ratio of FeO is Fe3O42-3 times of phase proportion, and is beneficial to downstream users to carry out welding wire steel wire rodMechanical peeling replaces acid pickling peeling.
Description
Technical Field
The invention relates to the field of metallurgy, in particular to a welding wire steel wire rod using mechanical shelling to replace acid pickling shelling and a production method thereof.
Background
In the hot rolling process of the wire rod, iron scales are formed on the surface of steel. Generally, before subsequent deep processing, an oxide layer needs to be crushed and thoroughly removed so as to ensure the surface quality of a deep-processed product and protect a mould. At present, a wire drawing factory for welding wire steel is forced to be under the pressure of environmental protection and cost, a pickling process before primary drawing is cancelled in many times for wire drawing, and due to the change of a production process, pickling is changed into pickling-free, and direct drawing is carried out after mechanical shelling, so that scale peeling is easy to occur, wire drawing eye films are blocked, wire cutting is frequently carried out or production is slowed down, and the production efficiency of the wire drawing factory is greatly influenced.
Iron scale is an oxide commonly present in steel production processes, and many researchers have studied the high temperature oxidation behavior of carbon steel in air. FeO and Fe in the carbon steel scale along with the change of temperature in the air3O4、Fe2O3The three phases will change, and a composite layered structure will be formed. The Japanese researchers thought that scales with good mechanical peeling should be thicker and have fewer cracks inside, and not generate Fe3O4The transformation has large internal stress, low bonding force between the iron scale and the matrix, small thickness difference of the iron scale, and no Fe at the boundary of the iron scale and the iron matrix as much as possible3O4. College students in China study the relation between the quality of the iron scale of the welding wire steel, the production process and the mechanical shelling effect, but the physical parameters and the surface quality of the iron scale cannot be flexibly controlled. The structure and the thickness of the iron scale on the surface of the steel wire rod of the welding wire produced by the existing process are unreasonable, which is not beneficial to mechanical shelling treatment and influences the post-drawing production of users.
Therefore, considering that the iron scale on the surface of the wire rod produced by the conventional production process is unreasonable in structure, hot-rolled welding wire steel wire rods suitable for pickling-free use and production processes thereof need to be researched, so that the use requirements of users on the hot-rolled wire rods are met.
Patent application No. 201710489757.5 discloses "control method of ultra-low carbon steel scale", which is mentioned in the claimsThe spinning temperature is 895-910 ℃, and a stelmor controlled cooling line roller way speed setting scheme and the opening state of a fan and a heat-insulating cover are established. However, the technical scheme of heating and rolling the casting blank is not introduced, the cleaning of the primary oxide scale on the surface of the casting blank is not facilitated, and FeO and Fe are not researched3O4The phase comparison problem.
Patent application No. 201410491241.0 discloses a method for controlling the surface iron scale of a low-carbon steel hot-rolled wire rod, wherein the C content is 0.03-0.08%, the spinning temperature is 820-860 ℃, and the final thickness of the low-carbon steel hot-rolled wire rod iron scale is 20-30 μm. According to the technical scheme of the patent, researches on heating and dephosphorization of the casting blank are not carried out, and the cleaning of primary iron oxide scale on the surface of the casting blank is not facilitated.
Disclosure of Invention
The invention aims to invent a welding wire steel wire rod suitable for an acid-washing-free shelling process and a production method thereof. On the basis of not increasing the production cost and keeping the original production process, the thickness and the phase ratio of the iron scale are improved by optimizing parameters such as heating time, dephosphorization water pressure, spinning temperature, roller bed cooling speed, wire rod cover outlet temperature and the like, and the wire rod for the wire rod steel, which is easy to peel, free of acid washing and environment-friendly, is produced to meet the use requirements of downstream users.
The specific technical scheme is as follows:
the technical scheme of the invention provides a welding wire steel wire rod suitable for an acid-washing-free shelling process and a production method thereof, wherein the welding wire steel wire rod comprises the following chemical components in percentage by mass: 0.05-0.15%, Si: 0.15% -1.15%, Mn: 1.40 to 1.90 percent of iron, less than or equal to 0.025 percent of S, less than or equal to 0.025 percent of P, and the balance of iron and residual elements.
The acid pickling-free hot-rolled wire rod of the invention has the following effects and influence analysis of elements in chemical components:
carbon is the main strengthening element in steel. The higher the carbon content, the higher the strength of the wire rod and subsequently produced wire deposit metal. However, too high a carbon content results in a significant decrease in the toughness of the wire deposit metal. Therefore, under the condition of ensuring the strength requirement, the carbon content is lower as much as possible, and the C content is controlled to be 0.05-0.15 percent in the invention.
Silicon and manganese are important deoxidizing elements and improve the strength of deposited metal of a subsequently manufactured welding wire. The proper amount of silicon and manganese elements can obviously reduce the oxygen content in the welded deposited metal of the welding wire, and avoid generating a large amount of coarse proeutectoid ferrite harmful to toughness in the welded deposited metal of the welding wire. However, too high silicon and manganese elements may cause formation of mn-si olivine on the surface of the wire rod, deteriorating the wire rod shelling effect. Therefore, the invention controls the Si content at 0.15-1.15%; the content of Mn element is controlled to be 1.40-1.90%.
Sulfur and phosphorus are harmful impurity elements of steel grade, and are required to be controlled to be less than or equal to 0.025 percent of S and less than or equal to 0.025 percent of P, and are beneficial to product production under the condition of not generating other influences.
The invention relates to a production method of a welding wire steel wire rod suitable for an acid pickling-free process, which comprises the steps of continuous casting billet heating, high-pressure water descaling, rolling, cooling and covering; the method mainly controls the thickness and the phase composition proportion of the iron scale by adjusting the heating temperature of the continuous casting billet, the high-pressure water descaling pressure, the wire rod spinning temperature and the cooling process, and comprises the following specific process steps:
(1) the total in-furnace time of the continuous casting billet is 3-3.5 hours, so that the continuous casting billet is fully heated to adapt to the subsequent higher spinning temperature. The method comprises the following steps of removing phosphorus from a steel billet by high-pressure water after the steel billet is discharged from a furnace, wherein the phosphorus removal water pressure is 18-22 MPa, and the purpose is to thoroughly remove iron oxide scales on the surface of the steel billet, because a wire rod of a welding wire is soft, the residual iron oxide scales are easily pressed into the wire rod in the rolling process, and the welding wire drawing is influenced by defects.
(2) The spinning temperature of the wire rod is controlled to be 900-950 ℃ by adjusting the finish rolling water cooling, so that the proportion of FeO in the iron scale is Fe3O42-3 times of phase ratio. Because the temperature interval for generating the iron scale is mainly in the temperature interval from the spinning temperature to 800 ℃, the slower the speed is, the larger the thickness of the iron scale is. The spinning temperature is higher than 950 ℃, the oxidation degree of the surface of the wire rod is too high, the yield strength of FeO on the surface of the wire rod is in a descending trend, and the phenomenon that an iron oxide skin layer is not easy to break under the high-temperature condition can occur. The spinning temperature is lower than 900 ℃, and red rust is generated on the surface of the wire rod.
(3) Close offThe stelmor air-cooled line fan controls the speed of a roller way to be 0.2-0.4 m/s, a certain amount of cover cap is opened, the temperature of the wire rod out of the cover cap is guaranteed to be 570-600 ℃, the cooling speed of the iron scale on the surface of the wire rod is accelerated, and the thickness of the iron scale is controlled to be 30-40 mu m finally. The cooling process is the main generation process of the final iron scale on the surface of the wire rod, so that the control of the roller way speed and the cover discharging time is the key process for obtaining the proper thickness of the iron scale. Too high a cooling rate may promote Fe3O4The generation is not beneficial to mechanical husking, and the low cooling speed is not beneficial to production. FeO is in a stable state at 570-1371 ℃, and at the temperature below 570 ℃, the FeO generates eutectoid reaction to generate a mixed product which is also not beneficial to mechanical shelling.
Has the advantages that:
compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, the parameters such as billet heating time, dephosphorization water pressure, spinning temperature, roller bed cooling speed, wire rod cover outlet temperature and the like are optimized, so that the oxide scale on the surface of the wire rod of the welding wire steel has proper thickness and phase proportion.
(2) The thickness of the iron scale of the wire rod of the welding wire produced by the method is 30-40 mu m, and the proportion of FeO is Fe3O4The phase proportion is 2-3 times, the wire rod is suitable for mechanical shelling of a welding wire steel production plant, acid pickling shelling is replaced, and the requirements of low cost and environmental protection of users are met.
Detailed Description
The following examples are intended to illustrate the invention in detail, and are intended to be a general description of the invention, and not to limit the invention.
The chemical compositions of the example steels are listed in table 1, the process parameters of the example steels are listed in table 2, and the iron oxide scale phase ratios and thicknesses of the example surfaces are listed in table 3.
Table 1 chemical composition of the example steels, wt.%
| Examples | C | Si | Mn | P | S |
| 1 | 0.074 | 0.92 | 1.55 | 0.020 | 0.020 |
| 2 | 0.085 | 0.85 | 1.48 | 0.016 | 0.0090 |
| 3 | 0.10 | 0.88 | 1.59 | 0.014 | 0.0084 |
| 4 | 0.12 | 0.21 | 1.79 | 0.021 | 0.020 |
| 5 | 0.13 | 0.23 | 1.82 | 0.015 | 0.013 |
| 6 | 0.15 | 0.26 | 1.84 | 0.012 | 0.0088 |
Table 2 process parameters of the steels of the examples
Table 3 example wire rod surface iron oxide scale phase ratio and thickness
The embodiment shows that the proportion and the thickness of the scale phase on the surface of the prepared welding wire steel wire rod are reasonable by adopting the component design and the process, and the mechanical peeling of the welding wire steel wire rod by a downstream user is facilitated, so that the pickling peeling is replaced, and the environmental pollution and the production cost are reduced.
Claims (3)
1. A welding wire steel wire rod suitable for an acid-washing-free shelling process is characterized in that chemical components in steel are as follows by mass percent: c: 0.05-0.15%, Si: 0.15% -1.15%, Mn: 1.40 to 1.90 percent of iron, less than or equal to 0.025 percent of S, less than or equal to 0.025 percent of P, and the balance of iron and inevitable impurities.
2. The welding wire steel wire rod suitable for the pickling-free shelling process as claimed in claim 1, wherein the thickness of the scale of the wire rod is 30-40 μm, and the proportion of FeO is Fe3O42-3 times of phase ratio.
3. A method for producing a wire rod of welding wire suitable for a pickling-free shelling process as defined in claim 1 or 2, the steel plate being produced by: continuous casting billet heating, high pressure water descaling, rolling, cooling, shroud, its characterized in that:
(1) heating the continuous casting billet for 3-3.5 h, and removing phosphorus from the billet by high-pressure water after the billet is discharged from the furnace, wherein the phosphorus removal water pressure is 18-22 MPa;
(2) controlling the spinning temperature of the wire rod to be 900-950 ℃;
(3) after air cooling, the speed of the roller way is controlled to be 0.2-0.4 m/s, and the cover cap is opened to ensure that the temperature of the wire rod out of the cover cap is 570-600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010474568.2A CN111647811A (en) | 2020-05-29 | 2020-05-29 | Welding wire steel wire rod suitable for pickling-free shelling process and production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010474568.2A CN111647811A (en) | 2020-05-29 | 2020-05-29 | Welding wire steel wire rod suitable for pickling-free shelling process and production method |
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| Publication Number | Publication Date |
|---|---|
| CN111647811A true CN111647811A (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010474568.2A Pending CN111647811A (en) | 2020-05-29 | 2020-05-29 | Welding wire steel wire rod suitable for pickling-free shelling process and production method |
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| Country | Link |
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| CN (1) | CN111647811A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112122338A (en) * | 2020-09-16 | 2020-12-25 | 广东韶钢松山股份有限公司 | Ultra-low carbon steel wire rod for steel ladle steel wire and production process thereof |
| 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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| CN112122338A (en) * | 2020-09-16 | 2020-12-25 | 广东韶钢松山股份有限公司 | Ultra-low carbon steel wire rod for steel ladle steel wire and production process thereof |
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| 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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Application publication date: 20200911 |
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