CN114107593A - Production method of 60 kg-grade welding wire steel - Google Patents
Production method of 60 kg-grade welding wire steel Download PDFInfo
- Publication number
- CN114107593A CN114107593A CN202111314794.5A CN202111314794A CN114107593A CN 114107593 A CN114107593 A CN 114107593A CN 202111314794 A CN202111314794 A CN 202111314794A CN 114107593 A CN114107593 A CN 114107593A
- Authority
- CN
- China
- Prior art keywords
- temperature
- percent
- welding wire
- refining
- grade
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 238000003466 welding Methods 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000007670 refining Methods 0.000 claims abstract description 28
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000010079 rubber tapping Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 18
- 239000001301 oxygen Substances 0.000 claims abstract description 18
- 238000007664 blowing Methods 0.000 claims abstract description 15
- 229910052786 argon Inorganic materials 0.000 claims abstract description 12
- 238000009749 continuous casting Methods 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 6
- WNQQFQRHFNVNSP-UHFFFAOYSA-N [Ca].[Fe] Chemical compound [Ca].[Fe] WNQQFQRHFNVNSP-UHFFFAOYSA-N 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011575 calcium Substances 0.000 claims abstract description 6
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 6
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 6
- 238000007667 floating Methods 0.000 claims abstract description 6
- 230000024121 nodulation Effects 0.000 claims abstract description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 6
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 48
- 238000005096 rolling process Methods 0.000 claims description 23
- 239000002893 slag Substances 0.000 claims description 21
- 229910052742 iron Inorganic materials 0.000 claims description 20
- 229910052799 carbon Inorganic materials 0.000 claims description 15
- 239000012535 impurity Substances 0.000 claims description 14
- 238000006477 desulfuration reaction Methods 0.000 claims description 13
- 230000023556 desulfurization Effects 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052719 titanium Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 230000003009 desulfurizing effect Effects 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000010436 fluorite Substances 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 238000003723 Smelting Methods 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 abstract description 2
- 239000010936 titanium Substances 0.000 description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 238000005275 alloying Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
Images
Classifications
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
-
- 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
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a production method of 60 kg-grade welding wire steel, which comprises the following steps: the C content in the molten steel at the converter end point is not less than 0.06 wt%, and the P content is not more than 0.025 wt%; the converter tapping temperature is 1620-1644 ℃, and a deoxidizer aluminum iron is added into the converter tapping; after the ladle reaches the refining process, the temperature is measured when the ladle bottom is soft and argon is blown for 5min, and oxygen is determined after the molten steel stops blowing argon and is calmed for 1 min. The active oxygen control target is 40-50ppm, and when the oxygen is high, the aluminium deoxidizer is added. After LF refining is finished, adding a calcium iron wire for calcium treatment to convert high-melting-point Al2O3 into low-melting-point calcium aluminate, improving castability, effectively preventing nozzle nodulation, ensuring soft blowing for more than 8 minutes after refining, and ensuring uniformity of ladle temperature and floating of fine inclusions; the continuous casting superheat degree is set to be 25-35 ℃, and the drawing speed is 1.9-2.2 m/min.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a production method of 60 kg-grade welding wire steel.
Background
The 60 kg-grade welding wire steel is high-strength welding steel and is mainly used for welding engineering machinery manufacturing, boiler pressure vessels, automobile industry, bridge building structures and the like. The 60 kg-grade welding wire steel which is mainstream in the market at present generally has the problems of high alloy cost, poor welding performance and large welding spatter.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a production method of 60 kg-grade welding wire steel, the invention adopts a titanium micro-alloying low-cost design, the alloy cost is lower compared with that of a high-strength welding wire of the same grade, meanwhile, the welding spatter of the welding wire during welding is extremely small by adopting the titanium micro-alloying, and the welding effect is better compared with that of a gas-shielded welding wire of the same grade.
In order to solve the technical problems, the invention adopts the following technical scheme:
a production method of 60 kg-grade welding wire steel mainly comprises the following production steps:
the C content in the molten steel at the converter end point is not less than 0.06 wt%, and the P content is not more than 0.025 wt%; the converter tapping temperature is 1620-1644 ℃, and a deoxidizer aluminum iron is added into the converter tapping; after the ladle reaches the refining step, measuring the temperature when the ladle bottom is soft and argon is blown for 5min, and fixing oxygen after the molten steel stops blowing argon and is calmed for 1 min; controlling the target of active oxygen to be 40-50ppm, and supplementing an aluminum deoxidizer when the oxygen is high;
after LF refining is finished, adding iron calcium wire for calcium treatment to enable high-melting-point Al2O3The calcium aluminate with low melting point is converted, the castability is improved, the nozzle nodulation is effectively prevented, the soft blowing is ensured to be carried out for more than 8 minutes after the refining, and the uniformity of the temperature of the ladle and the floating of fine impurities are ensured; the continuous casting superheat degree is set to be 25-35 ℃, and the drawing speed is 1.9-2.2 m/min.
Further, the chemical components of the 60 kg-grade welding wire steel are as follows by mass percent: less than or equal to 0.10 percent of C, 0.80-0.95 percent of Si, 1.40-1.60 percent of Mn, 0.10-0.30 percent of Cr, 0.05-0.16 percent of Ti, and the balance of Fe and inevitable impurities, wherein P in the impurities is less than or equal to 0.020 percent, and S in the impurities is less than or equal to 0.020 percent.
Further, the specific preparation process is as follows:
molten iron desulphurization: blast furnace slag is removed before desulfurization so as to improve desulfurization efficiency; melting iron ore into molten iron, desulfurizing the molten iron by a KR method, namely stirring the molten iron by a stirring paddle with the rotating speed of 90r/min for 2min, and adding a desulfurizing agent, wherein the desulfurizing agent is 9: 1, stirring and reacting the mixed lime powder and fluorite for 10min, and standing for 5 min; after the molten iron is desulfurized and stood, desulfurized slag is removed, the desulfurization effect is stabilized, the desulfurized slag is prevented from entering a converter to cause the resulfurization of the converter, and the sulfur content in the steel is ensured to be controlled below 0.01 percent;
converter: smelting by a combined blown converter, adopting a double slag method and a post-furnace recarburization process; tapping for the first time, wherein slag blocking balls or slag blocking plugs are used for blocking slag during tapping, and aluminum iron is used for final deoxidation; end point control target: c is less than or equal to 0.05 percent, and the tapping temperature T is more than or equal to 1620 ℃; the addition of the deoxidizer is started when molten steel is tapped to 1/3, the addition of the alloy is started after the addition of the deoxidizer, and the addition amount of the alloy is adjusted according to the end point carbon and the tapping amount;
refining: the converter molten steel is transported to a refining operation line by a ladle transport vehicle and refined in the whole Ar blowing state; heating in a mode of gradually increasing the temperature rise speed from low level to high level, and carrying out slagging, fine adjustment and temperature rise operation according to the components and temperature change of molten steel; in order to ensure the low-carbon requirement of the finished wire rod, the carbon content is strictly controlled by LF refining, and the carbon content is controlled to be 0.05 percent; after the ladle reaches the refining step, measuring the temperature when the ladle bottom is soft and argon is blown for 5min, and fixing oxygen after the molten steel stops blowing argon and is calmed for 1 min; controlling the target of active oxygen to be 40-50ppm, and supplementing an aluminum deoxidizer when the oxygen is high; in the refining process, 400kg of lime and 50-100kg of fluorite are added for slagging and desulfurization; after LF refining is finished, 500 m iron-calcium wires are added for calcium treatment, so that high-melting-point Al2O3 is converted into low-melting-point calcium aluminate, the castability is improved, nozzle nodulation is effectively prevented, soft blowing is guaranteed for more than 8 minutes, and the uniformity of the temperature of a ladle and the floating of fine inclusions are guaranteed;
continuous casting: the water amount of the crystallizer is 130-;
rolling: heating the continuous casting slab to 1200 ℃, discharging and measuring the temperature of about 1200 ℃, removing scale by high-pressure water, rolling at 1050 +/-20 ℃, after rough rolling and intermediate rolling, controlling the final rolling temperature to 900 +/-20 ℃, keeping the temperature in the rolling process, delaying to go to a cooling bed, keeping the temperature as far as possible, and entering the working procedures of finishing and bundling.
Further, the chemical components of the 60 kg-grade welding wire steel are as follows by mass percent: c: 0.07%, Si 0.88%, Mn 1.48%, Cr 0.15%, Ti 0.07%, and the balance Fe and unavoidable impurities, P: 0.012%, S: 0.010%.
Further, the chemical components of the 60 kg-grade welding wire steel are as follows by mass percent: c: 0.07%, Si 0.83%, Mn 1.47%, Cr 0.17%, Ti 0.06%, and the balance Fe and unavoidable impurities, P: 0.009%, S: 0.006 percent.
Further, the chemical components of the 60 kg-grade welding wire steel are as follows by mass percent: c: 0.08%, 0.89% of Si, 1.48% of Mn, 0.14% of Cr, 0.07% of Ti, and the balance of Fe and inevitable impurities, wherein the molar ratio of P: 0.010%, S: 0.008 percent.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention adopts titanium micro-alloying low-cost design, has lower alloy cost compared with the same-grade high-strength welding wire, simultaneously adopts titanium micro-alloying to ensure that the welding spatter of the welding wire during welding is extremely small, and has better welding effect compared with the same-grade gas-shielded welding wire.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a metallographic structure photograph of a grade 60kg wire steel;
FIG. 2 is a comparison of weld seams, wherein the left side view is the weld seam condition of the present invention, and the right side view is the weld seam condition of other steel works in China.
Detailed Description
The main preparation process of the 60 kg-grade welding wire steel in the embodiment is as follows: molten iron desulfurization, converter, LF refining and continuous casting.
Molten iron desulphurization: blast furnace slag is removed before desulfurization so as to improve desulfurization efficiency; melting iron ore into molten iron, desulfurizing the molten iron by a KR method, namely stirring the molten iron by a stirring paddle with the rotating speed of 90r/min for 2min, and adding a desulfurizing agent, wherein the desulfurizing agent is 9: 1, stirring and reacting the mixed lime powder and fluorite for 10min, and standing for 5 min. And after the molten iron is desulfurized and stood, the desulfurized slag is removed, the desulfurization effect is stabilized, the desulfurized slag is prevented from entering a converter to cause the resulfurization of the converter, and the sulfur content in the steel is ensured to be controlled below 0.01 percent.
Converter: smelting by a combined blown converter, adopting a double slag method and a post-furnace recarburization process. Tapping for one time, using a slag blocking ball or a slag blocking plug to block slag during tapping, and finally deoxidizing by adopting ferro-aluminum. End point control target: c is less than or equal to 0.05 percent, and the tapping temperature T is more than or equal to 1620 ℃. The addition of the deoxidizer is started when the molten steel is tapped to 1/3, the addition of the alloy is started after the addition of the deoxidizer, and the addition amount of the alloy is adjusted according to the end point carbon and the tapping amount.
Refining: the converter molten steel is transported to a refining operation line by a ladle transport vehicle and refined in the whole Ar blowing state. Heating in a mode of gradually increasing the temperature rising speed from low grade to high grade, and carrying out slagging, fine adjustment and temperature rising operation according to the components and temperature change of the molten steel. In order to ensure the low-carbon requirement of the finished wire rod, the carbon content is strictly controlled by LF refining, and the carbon content is controlled to be 0.05%. After the ladle reaches the refining process, the temperature is measured when the ladle bottom is soft and argon is blown for 5min, and oxygen is determined after the molten steel stops blowing argon and is calmed for 1 min. The active oxygen control target is 40-50ppm, and when the oxygen is high, the aluminium deoxidizer is added. In the refining process, 400kg of lime and 50-100kg of fluorite are added for slagging and desulfurization. After LF refining is finished, 500 m iron-calcium wires are added for calcium treatment, so that high-melting-point Al2O3 is converted into low-melting-point calcium aluminate, the castability is improved, nozzle nodulation is effectively prevented, soft blowing is guaranteed for more than 8 minutes, and the uniformity of the temperature of a ladle and the floating of fine inclusions are guaranteed.
Continuous casting: the water amount in the crystallizer is 130-. Rolling: the specific rolling process is shown in table 3, the continuous casting slab is heated to 1200 ℃, taken out of the furnace, the temperature is about 1200 ℃, high-pressure water is descaled and then rolled, the rolling temperature is 1050 +/-20 ℃, after rough rolling and intermediate rolling, the final rolling temperature is controlled to 900 +/-20 ℃, heat preservation needs to be carried out in the rolling process, the finishing and bundling processes are carried out after the finish cooling bed is delayed and the heat preservation is carried out as far as possible.
TABLE 1 composition and temperature of converter tapping
| Tapping temperature, DEG C | Carbon content of steel tapping, wt% | Phosphorus content of tapping, wt% | |
| Example 1 | 1628 | 0.03 | 0.011 |
| Example 2 | 1623 | 0.04 | 0.011 |
| Example 3 | 1633 | 0.05 | 0.013 |
TABLE 2 continuous casting Process parameters
| Degree of superheat (. degree. C.) | Pulling speed (m/min) | |
| Example 1 | 29 | 2.1 |
| Example 2 | 30 | 2.1 |
| Example 3 | 28 | 2.1 |
Rolling process of surface 360 kg-grade welding wire steel
| Process scheme | Out-of-furnace temperature-℃ | The initial rolling temperature/. degree.C | The temperature of finish rolling is higher than | Final Rolling temperature/. degree.C |
| Before the process | 1200±20 | 1050±20 | 1050±20 | 900±20 |
TABLE 4 Final product composition (wt%, balance iron)
| C | Si | Mn | P | S | Cr | Ti | |
| Example 1 | 0.07 | 0.88 | 1.48 | 0.012 | 0.010 | 0.15 | 0.07 |
| Example 2 | 0.07 | 0.83 | 1.47 | 0.009 | 0.006 | 0.17 | 0.06 |
| Example 3 | 0.08 | 0.89 | 1.48 | 0.010 | 0.008 | 0.14 | 0.07 |
As can be seen from figure 2, the welding seam welded by the method almost has no splash particles, while other domestic welding splashes a little bit, and larger particles exist around the welding seam.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (6)
1. The production method of the 60 kg-grade welding wire steel is characterized by mainly comprising the following production steps:
the C content in the molten steel at the converter end point is not less than 0.06 wt%, and the P content is not more than 0.025 wt%; the converter tapping temperature is 1620-1644 ℃, and a deoxidizer aluminum iron is added into the converter tapping; after the ladle reaches the refining step, measuring the temperature when the ladle bottom is soft and argon is blown for 5min, and fixing oxygen after the molten steel stops blowing argon and is calmed for 1 min; controlling the target of active oxygen to be 40-50ppm, and supplementing an aluminum deoxidizer when the oxygen is high;
after LF refining is finished, adding iron calcium wire for calcium treatment to enable high-melting-point Al2O3The calcium aluminate with low melting point is converted, the castability is improved, the nozzle nodulation is effectively prevented, the soft blowing is ensured to be carried out for more than 8 minutes after the refining, and the uniformity of the temperature of the ladle and the floating of fine impurities are ensured; the continuous casting superheat degree is set to be 25-35 ℃, and the drawing speed is 1.9-2.2 m/min.
2. The method for producing the grade 60kg welding wire steel as claimed in claim 1, wherein the chemical components of the grade 60kg welding wire steel are as follows by mass percent: less than or equal to 0.10 percent of C, 0.80-0.95 percent of Si, 1.40-1.60 percent of Mn, 0.10-0.30 percent of Cr, 0.05-0.16 percent of Ti, and the balance of Fe and inevitable impurities, wherein P in the impurities is less than or equal to 0.020 percent, and S in the impurities is less than or equal to 0.020 percent.
3. The production method of the 60kg grade welding wire steel according to the claim 1 or 2, characterized in that the specific preparation process is as follows:
molten iron desulphurization: blast furnace slag is removed before desulfurization so as to improve desulfurization efficiency; melting iron ore into molten iron, desulfurizing the molten iron by a KR method, namely stirring the molten iron by a stirring paddle with the rotating speed of 90r/min for 2min, and adding a desulfurizing agent, wherein the desulfurizing agent is 9: 1, stirring and reacting the mixed lime powder and fluorite for 10min, and standing for 5 min; after the molten iron is desulfurized and stood, desulfurized slag is removed, the desulfurization effect is stabilized, the desulfurized slag is prevented from entering a converter to cause the resulfurization of the converter, and the sulfur content in the steel is ensured to be controlled below 0.01 percent;
converter: smelting by a combined blown converter, adopting a double slag method and a post-furnace recarburization process; tapping for the first time, wherein slag blocking balls or slag blocking plugs are used for blocking slag during tapping, and aluminum iron is used for final deoxidation; end point control target: c is less than or equal to 0.05 percent, and the tapping temperature T is more than or equal to 1620 ℃; the addition of the deoxidizer is started when molten steel is tapped to 1/3, the addition of the alloy is started after the addition of the deoxidizer, and the addition amount of the alloy is adjusted according to the end point carbon and the tapping amount;
refining: the converter molten steel is transported to a refining operation line by a ladle transport vehicle and refined in the whole Ar blowing state; heating in a mode of gradually increasing the temperature rise speed from low level to high level, and carrying out slagging, fine adjustment and temperature rise operation according to the components and temperature change of molten steel; in order to ensure the low-carbon requirement of the finished wire rod, the carbon content is strictly controlled by LF refining, and the carbon content is controlled to be 0.05 percent; after the ladle reaches the refining step, measuring the temperature when the ladle bottom is soft and argon is blown for 5min, and fixing oxygen after the molten steel stops blowing argon and is calmed for 1 min; controlling the target of active oxygen to be 40-50ppm, and supplementing an aluminum deoxidizer when the oxygen is high; in the refining process, 400kg of lime and 50-100kg of fluorite are added for slagging and desulfurization; after LF refining is finished, 500 m iron-calcium wires are added for calcium treatment, so that high-melting-point Al2O3 is converted into low-melting-point calcium aluminate, the castability is improved, nozzle nodulation is effectively prevented, soft blowing is guaranteed for more than 8 minutes, and the uniformity of the temperature of a ladle and the floating of fine inclusions are guaranteed;
continuous casting: the water amount of the crystallizer is 130-;
rolling: heating the continuous casting slab to 1200 ℃, discharging and measuring the temperature of about 1200 ℃, removing scale by high-pressure water, rolling at 1050 +/-20 ℃, after rough rolling and intermediate rolling, controlling the final rolling temperature to 900 +/-20 ℃, keeping the temperature in the rolling process, delaying to go to a cooling bed, keeping the temperature as far as possible, and entering the working procedures of finishing and bundling.
4. The method for producing the grade 60kg welding wire steel as claimed in claim 3, wherein the chemical components of the grade 60kg welding wire steel are as follows by mass percent: c: 0.07%, Si 0.88%, Mn 1.48%, Cr 0.15%, Ti 0.07%, and the balance Fe and unavoidable impurities, P: 0.012%, S: 0.010%.
5. The method for producing the grade 60kg welding wire steel as claimed in claim 3, wherein the chemical components of the grade 60kg welding wire steel are as follows by mass percent: c: 0.07%, Si 0.83%, Mn 1.47%, Cr 0.17%, Ti 0.06%, and the balance Fe and unavoidable impurities, P: 0.009%, S: 0.006 percent.
6. The method for producing the grade 60kg welding wire steel as claimed in claim 1, wherein the chemical components of the grade 60kg welding wire steel are as follows by mass percent: c: 0.08%, 0.89% of Si, 1.48% of Mn, 0.14% of Cr, 0.07% of Ti, and the balance of Fe and inevitable impurities, wherein the molar ratio of P: 0.010%, S: 0.008 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111314794.5A CN114107593A (en) | 2021-11-08 | 2021-11-08 | Production method of 60 kg-grade welding wire steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111314794.5A CN114107593A (en) | 2021-11-08 | 2021-11-08 | Production method of 60 kg-grade welding wire steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114107593A true CN114107593A (en) | 2022-03-01 |
Family
ID=80381371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111314794.5A Pending CN114107593A (en) | 2021-11-08 | 2021-11-08 | Production method of 60 kg-grade welding wire steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114107593A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114959426A (en) * | 2022-05-09 | 2022-08-30 | 包头钢铁（集团）有限责任公司 | Preparation method of metal material for automobile brake cable |
| CN115433880A (en) * | 2022-08-22 | 2022-12-06 | 包头钢铁（集团）有限责任公司 | Low-cost submerged arc welding wire and production method thereof |
| CN116377329A (en) * | 2023-04-06 | 2023-07-04 | 包头钢铁（集团）有限责任公司 | Annealing-free 600 MPa-level welding wire steel and production method thereof |
| CN116752040A (en) * | 2023-06-13 | 2023-09-15 | 包头钢铁（集团）有限责任公司 | Production method of titanium-nickel-molybdenum series 700 MPa-grade welding wire steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239426A (en) * | 2008-03-07 | 2008-08-13 | 金秋生 | Welding wire for gas shielded arc welding for 60 kilogram level high-tensile structural steel |
| CN102069321A (en) * | 2011-01-10 | 2011-05-25 | 武汉铁锚焊接材料股份有限公司 | Low-cost gas shielded welding wire for 60 kilogram grade steel |
| CN109706391A (en) * | 2018-12-14 | 2019-05-03 | 河钢股份有限公司承德分公司 | A kind of 60 kg class high-strength welding wire gren rod and its production method |
| CN112342451A (en) * | 2020-09-02 | 2021-02-09 | 包头钢铁（集团）有限责任公司 | Production method of rare earth-containing H08A electrode steel |
-
2021
- 2021-11-08 CN CN202111314794.5A patent/CN114107593A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239426A (en) * | 2008-03-07 | 2008-08-13 | 金秋生 | Welding wire for gas shielded arc welding for 60 kilogram level high-tensile structural steel |
| CN102069321A (en) * | 2011-01-10 | 2011-05-25 | 武汉铁锚焊接材料股份有限公司 | Low-cost gas shielded welding wire for 60 kilogram grade steel |
| CN109706391A (en) * | 2018-12-14 | 2019-05-03 | 河钢股份有限公司承德分公司 | A kind of 60 kg class high-strength welding wire gren rod and its production method |
| CN112342451A (en) * | 2020-09-02 | 2021-02-09 | 包头钢铁（集团）有限责任公司 | Production method of rare earth-containing H08A electrode steel |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114959426A (en) * | 2022-05-09 | 2022-08-30 | 包头钢铁（集团）有限责任公司 | Preparation method of metal material for automobile brake cable |
| CN115433880A (en) * | 2022-08-22 | 2022-12-06 | 包头钢铁（集团）有限责任公司 | Low-cost submerged arc welding wire and production method thereof |
| CN116377329A (en) * | 2023-04-06 | 2023-07-04 | 包头钢铁（集团）有限责任公司 | Annealing-free 600 MPa-level welding wire steel and production method thereof |
| CN116752040A (en) * | 2023-06-13 | 2023-09-15 | 包头钢铁（集团）有限责任公司 | Production method of titanium-nickel-molybdenum series 700 MPa-grade welding wire steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114107593A (en) | Production method of 60 kg-grade welding wire steel | |
| CN110229992B (en) | Smelting production method of titanium microalloyed low-cost Q355B steel plate | |
| CN106834960B (en) | A kind of automobile using boracic top grade gear steel and its production technology | |
| CN109136466B (en) | Method for making steel from sulfur-containing and aluminum-containing steel | |
| CN112342451A (en) | Production method of rare earth-containing H08A electrode steel | |
| CN105603156B (en) | The production method of super-low sulfur IF steel | |
| CN111876669B (en) | Control method of process for smelting low-carbon steel by converter | |
| CN113981305A (en) | Production method of titanium microalloyed 700 MPa-grade welding wire steel | |
| CN103334050B (en) | Process utilizing sheet billet continuous casting to manufacture low aluminum silicon calm carbon structural steel | |
| CN103074545B (en) | High-strength low temperature hot rolling resistant channel steel for forklift gantry and preparation method for channel steel | |
| CN109706404B (en) | Titanium-containing carbon steel and production method thereof | |
| CN111004886B (en) | Smelting method for reducing unit consumption of molten iron | |
| CN113943893A (en) | Production method of 700 MPa-grade rare earth-containing welding wire steel | |
| CN107447157B (en) | Cold heading steel and manufacturing process thereof | |
| CN112708720B (en) | Smelting method for improving niobium yield of low-carbon low-silicon niobium-containing steel | |
| CN113462961B (en) | Production method of rare earth-containing round-link chain wire rod | |
| CN114318154A (en) | High-cleanliness welding wire steel L-S3 and preparation method thereof | |
| CN111206177A (en) | Production method of SWRH82B steel with low acid-soluble aluminum content | |
| CN114507819A (en) | Production method of vehicle atmospheric corrosion resistant 500MPa grade welding wire steel | |
| CN114836593A (en) | Smelting process of low-carbon aluminum-containing cold forging steel | |
| CN113913580B (en) | Production method of ultralow-carbon low-aluminum structural molten steel | |
| CN105695661A (en) | Method for smelting Q235B steel on CSP production line | |
| CN104711476A (en) | Channel steel for hot rolling of forklift portal and preparation method of channel steel | |
| CN111172469A (en) | SWRH82B wire rod with low acid-soluble aluminum content | |
| CN113604724B (en) | 904L super austenitic stainless steel and preparation method thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220301 |