CN112680675A - Boron-containing steel and preparation method thereof - Google Patents
Boron-containing steel and preparation method thereof Download PDFInfo
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- CN112680675A CN112680675A CN202011420903.7A CN202011420903A CN112680675A CN 112680675 A CN112680675 A CN 112680675A CN 202011420903 A CN202011420903 A CN 202011420903A CN 112680675 A CN112680675 A CN 112680675A
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- 229910052796 boron Inorganic materials 0.000 title claims abstract description 58
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 54
- 239000010959 steel Substances 0.000 title claims abstract description 54
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000003723 Smelting Methods 0.000 claims abstract description 21
- 229910052742 iron Inorganic materials 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 14
- 229910052732 germanium Inorganic materials 0.000 claims abstract description 13
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 13
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 12
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 229910052718 tin Inorganic materials 0.000 claims abstract description 11
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 10
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000010079 rubber tapping Methods 0.000 claims abstract description 7
- 229910052709 silver Inorganic materials 0.000 claims abstract description 7
- 238000007664 blowing Methods 0.000 claims description 27
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 239000011777 magnesium Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 230000003009 desulfurizing effect Effects 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 229910001566 austenite Inorganic materials 0.000 claims description 8
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 7
- 229910052706 scandium Inorganic materials 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229910052714 tellurium Inorganic materials 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 4
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 238000009529 body temperature measurement Methods 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229910052785 arsenic Inorganic materials 0.000 claims 1
- 229910052791 calcium Inorganic materials 0.000 claims 1
- 229910052746 lanthanum Inorganic materials 0.000 claims 1
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 4
- 238000005098 hot rolling Methods 0.000 abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 3
- 239000011593 sulfur Substances 0.000 abstract description 3
- 239000011572 manganese Substances 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- 239000011651 chromium Substances 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 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
- 239000011574 phosphorus Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides boron-containing steel and a preparation method thereof. According to the technical scheme, firstly, alloy steel with brand-new components is constructed, and a specific smelting process is designed for the alloy steel on the basis. Specifically, the boron-containing steel contains the following components in percentage by weight: C. si, Mn, Sc, Gd, Sb, Te, Ge, Ag, Sn, B, Co, Mg, and the balance of Fe; meanwhile, S, P, Cr, Ni and Cu are controlled within a certain range. In the aspect of a smelting method, firstly, molten iron is pretreated, after the content of sulfur element is fully reduced, the molten iron is firstly smelted with Si, Ge, B and Co under the condition of reduced pressure, then the smelted molten iron is transferred into a converter for converting, and finally, tapping is cooled to obtain a finished product. The boron-containing steel has higher tensile strength and yield strength, lower elongation, improved fracture toughness and excellent mechanical properties. Moreover, the billet obtained by the smelting method does not generate cracks during hot rolling, and the product quality is more stable.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to boron-containing steel and a preparation method thereof.
Background
The anchor chain is a special chain for connecting the anchor and the ship body and transferring the holding power of the anchor and is made of steel. Because of the considerable mass of the ship, the anchor chain must have sufficient tensile strength to be used normally, and the mechanical properties of the steel material itself are the basis and key for ensuring the tensile capacity of the anchor chain.
Steel for anchor chains (anchor steel) is hot rolled round steel or forged round steel used for manufacturing electric welding anchor chains for ships. At present, the steel for anchor chains mainly comprises models of M15, M20, M30 and the like, wherein the carbon content is respectively 0.12-0.18%, 0.16-0.25% and 0.27-0.34%, the silicon content is respectively less than or equal to 0.05%, 0.15-0.4% and 0.2-0.55%, the manganese content is respectively 0.3-0.6%, 1-1.6% and 1.2-1.8%, and the contents of sulfur, phosphorus, chromium, nickel and copper are unified and are respectively not more than 0.04%, 0.25%, 0.3% and 0.3%. The tensile strength is about 300 to 680MPa, the elongation is 17 to 30 percent, the face shrinkage is about 40 percent, and the average value of the impact energy is about 50 to 60J/cm2. The above conventional steel for anchor chains is to be reinforced in mechanical properties.
It is considered that the boron-containing steel has better hardenability, and can improve the high-temperature strength and creep strength and the mechanical property of the steel. However, in practical application, it is found that the conventional boron-containing steel is easy to crack in a hot rolling process, so that the yield is low, and the quality uniformity is difficult to ensure.
Disclosure of Invention
The invention aims to overcome the technical defects in the prior art and provides boron-containing steel and a preparation method thereof so as to solve the technical problem that the mechanical strength of the conventional steel for anchor chains needs to be improved.
The invention also aims to solve the technical problem that the conventional boron-containing steel is easy to have the defects of cracks and the like in the hot rolling process.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the boron-containing steel comprises the following components in percentage by weight: c: 0.08-0.1%, Si: 0.6-0.7%, Mn: 0.05-0.1%, Sc: 0.01-0.02%, Gd: 0.2% -0.8%, Sb: 0.32% -0.36%, Te: 0.02% -0.03%, Ge: 0.04-0.09%, Ag: 0.001% -0.002%, Sn: 0.005% -0.008%, B: 0.15% -0.16%, Co: 0.002% -0.006%, Mg: 0.003-0.007%, S: 0-0.04%, P: 0-0.04%, Cr: 0-0.25%, Ni: 0-0.3%, Cu: 0 to 0.3%, and the balance Fe.
Preferably, the boron-containing steel further contains 0.03 to 0.07% of Ca.
Preferably, the boron-containing steel further contains 0.001% to 0.002% of La.
Preferably, the boron-containing steel further contains 0.003 to 0.005% of Ti.
Preferably, the boron-containing steel further contains 0.001% to 0.002% of As.
Preferably, the volume percentage of austenite in the boron-containing steel is 40-45%; the average grain size of austenite in the boron-containing steel is 30 to 40 μm.
On the basis of the technical scheme, the invention further provides a preparation method of the boron-containing steel, which comprises the following steps:
1) adding a desulfurizing agent into a ladle, placing molten iron with the temperature of 1300-1350 ℃ into the ladle to keep for 20min, and then transferring the molten iron into a smelting furnace;
2) after the materials in the smelting furnace are remelted, controlling the internal pressure of the smelting furnace to be 0.2-0.3 atmospheric pressure by a vacuum pump, controlling the temperature to be 1700 ℃ and keeping for 30min, and then restoring the normal pressure; adding Si, Ge, B and Co with the formula amount from a hopper, cooling to 1300 ℃, and keeping for 15 min;
3) transferring the product obtained in the step 2) into a converter for converting, and setting the bottom blowing strength to be 0.05Nm before blowing3/(t.min), the oxygen supply intensity after oxygen lance blow-on was set to 2Nm3V (t.min), the lance position in the blowing process is 2m, and C, Mn, Sc and Gd with the formula amount are added after blowing is startedSb, Te, Ag, Sn and Mg, reducing the gun position to 1.5m after the first carbon determination and temperature measurement of the sublance until the converting end point, wherein the end point temperature is 1550-1580 ℃; and tapping after blowing is finished.
Preferably, the desulfurizing agent in the step 1) comprises the following components in parts by weight: 33-47 parts of calcium carbonate, 22-28 parts of calcium fluoride, 8-18 parts of silicon dioxide, 10-11 parts of aluminum sulfate, 0.2-0.4 part of calcium oxide and 0.3-0.5 part of magnesium oxide; in the step 1), the foundry ladle is in an ultrasonic oscillation environment.
The invention provides boron-containing steel and a preparation method thereof. According to the technical scheme, firstly, alloy steel with brand-new components is constructed, and a specific smelting process is designed for the alloy steel on the basis. Specifically, the boron-containing steel comprises the following components in percentage by weight: c: 0.08-0.1%, Si: 0.6-0.7%, Mn: 0.05-0.1%, Sc: 0.01-0.02%, Gd: 0.2% -0.8%, Sb: 0.32% -0.36%, Te: 0.02% -0.03%, Ge: 0.04-0.09%, Ag: 0.001% -0.002%; sn: 0.005% -0.008%, B: 0.15% -0.16%, Co: 0.002% -0.006%, Mg: 0.003-0.007%, S: 0-0.04%, P: 0-0.04%, Cr: 0-0.25%, Ni: 0-0.3%, Cu: 0 to 0.3%, and the balance Fe. In the aspect of a smelting method, firstly, molten iron is pretreated, after the content of sulfur element is fully reduced, the molten iron is firstly smelted with Si, Ge, B and Co under the condition of reduced pressure, then the smelted molten iron is transferred into a converter for converting, and finally, tapping is cooled to obtain a finished product. The boron-containing steel has higher tensile strength and yield strength, lower elongation, improved fracture toughness and excellent mechanical properties. Moreover, the billet obtained by the smelting method does not generate cracks during hot rolling, and the product quality is more stable.
Detailed Description
Hereinafter, specific embodiments of the present invention will be described in detail. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Example 1
The boron-containing steel comprises the following components in percentage by weight: c: 0.1%, Si: 0.7%, Mn: 0.1%, Sc: 0.02%, Gd: 0.8%, Sb: 0.36%, Te: 0.03%, Ge: 0.09%, Ag: 0.002%, Sn: 0.008%, B: 0.16%, Co: 0.006%, Mg: 0.007%, S: 0.02%, P: 0.02%, Cr: 0.01%, Ni: 0.15%, Cu: 0.15 percent and the balance of Fe.
The volume percentage of austenite in the boron-containing steel is 40%; the average grain size of austenite in the boron-containing steel is 30 μm.
The preparation method of the boron-containing steel comprises the following steps:
1) adding a desulfurizing agent into a ladle, placing molten iron with the temperature of 1300 ℃ into the ladle to keep for 20min, and then transferring the molten iron into a smelting furnace;
2) after the materials in the smelting furnace are remelted, controlling the internal pressure of the smelting furnace to be 0.2 atmospheric pressure by a vacuum pump, controlling the temperature to be 1700 ℃ and keeping for 30min, and then recovering the normal pressure; adding Si, Ge, B and Co with the formula amount from a hopper, cooling to 1300 ℃, and keeping for 15 min;
3) transferring the product obtained in the step 2) into a converter for converting, and setting the bottom blowing strength to be 0.05Nm before blowing3/(t.min), the oxygen supply intensity after oxygen lance blow-on was set to 2Nm3(t.min), the lance position in the converting process is 2m, the formulated amount of C, Mn, Sc, Gd, Sb, Te, Ag, Sn and Mg are added after the blowing is started, the lance position is reduced to 1.5m until the converting end point after the sublance fixes carbon and measures temperature for the first time, and the end point temperature is 1550 ℃; and tapping after blowing is finished.
The desulfurizing agent in the step 1) comprises the following components in parts by weight: 33 parts of calcium carbonate, 22 parts of calcium fluoride, 8 parts of silicon dioxide, 10 parts of aluminum sulfate, 0.2 part of calcium oxide and 0.3 part of magnesium oxide; in the step 1), the foundry ladle is in an ultrasonic oscillation environment.
The detection shows that the tensile strength of the boron-containing steel in the embodiment is 828MPa, and the boron-containing steel has yieldThe strength is 254MPa, the elongation is 13 percent, and the fracture toughness is 147.3 MPa.m1/2。
Example 2
The boron-containing steel comprises the following components in percentage by weight: c: 0.08%, Si: 0.6%, Mn: 0.05%, Sc: 0.01%, Gd: 0.2%, Sb: 0.32%, Te: 0.02%, Ge: 0.04%, Ag: 0.001%, Sn: 0.005%, B: 0.15%, Co: 0.002%, Mg: 0.003%, S: 0.02%, P: 0.02%, Cr: 0.01%, Ni: 0.15%, Cu: 0.15 percent and the balance of Fe. The volume percentage of austenite in the boron-containing steel is 45%; the average grain size of austenite in the boron-containing steel is 40 μm.
The preparation method of the boron-containing steel comprises the following steps:
1) adding a desulfurizing agent into a ladle, placing molten iron with the temperature of 1350 ℃ into the ladle to keep for 20min, and then transferring the molten iron into a smelting furnace;
2) after the materials in the smelting furnace are remelted, controlling the internal pressure of the smelting furnace to be 0.3 atmospheric pressure by a vacuum pump, controlling the temperature to be 1700 ℃ and keeping for 30min, and then recovering the normal pressure; adding Si, Ge, B and Co with the formula amount from a hopper, cooling to 1300 ℃, and keeping for 15 min;
3) transferring the product obtained in the step 2) into a converter for converting, and setting the bottom blowing strength to be 0.05Nm before blowing3/(t.min), the oxygen supply intensity after oxygen lance blow-on was set to 2Nm3(t.min), the lance position in the blowing process is 2m, the formulated amount of C, Mn, Sc, Gd, Sb, Te, Ag, Sn and Mg are added after blowing is started, the lance position is reduced to 1.5m until the blowing end point after the sublance fixes carbon for the first time and measures temperature, and the end point temperature is 1580 ℃; and tapping after blowing is finished.
The desulfurizing agent in the step 1) comprises the following components in parts by weight: 47 parts of calcium carbonate, 28 parts of calcium fluoride, 18 parts of silicon dioxide, 11 parts of aluminum sulfate, 0.4 part of calcium oxide and 0.5 part of magnesium oxide; in the step 1), the foundry ladle is in an ultrasonic oscillation environment.
The detection shows that the tensile strength of the boron-containing steel in the embodiment is 863MPa, the yield strength is 277MPa, the elongation is 12.5 percent, and the fracture toughness is 150.2 MPa.m1/2。
Example 3
The boron-containing steel comprises the following components in percentage by weight: c: 0.09%, Si: 0.65%, Mn: 0.07%, Sc: 0.015%, Gd: 0.5%, Sb: 0.34%, Te: 0.025%, Ge: 0.07%, Ag: 0.0015%, Sn: 0.007%, B: 0.155%, Co: 0.004%, Mg: 0.005%, S: 0.04%, P: 0.04%, Cr: 0.25%, Ni: 0.3%, Cu: 0.3 percent and the balance of Fe.
The preparation method of the boron-containing steel comprises the following steps:
1) adding a desulfurizing agent into a ladle, placing molten iron with the temperature of 1325 ℃ into the ladle to keep for 20min, and then transferring the molten iron into a smelting furnace;
2) after the materials in the smelting furnace are remelted, controlling the internal pressure of the smelting furnace to be 0.25 atmospheric pressure by a vacuum pump, controlling the temperature to be 1700 ℃ and keeping for 30min, and then recovering the normal pressure; adding Si, Ge, B and Co with the formula amount from a hopper, cooling to 1300 ℃, and keeping for 15 min;
3) transferring the product obtained in the step 2) into a converter for converting, and setting the bottom blowing strength to be 0.05Nm before blowing3/(t.min), the oxygen supply intensity after oxygen lance blow-on was set to 2Nm3(t.min), the lance position in the blowing process is 2m, the formula amount of C, Mn, Sc, Gd, Sb, Te, Ag, Sn and Mg are added after blowing is started, the lance position is reduced to 1.5m until the blowing end point after the sublance is subjected to carbon fixation and temperature measurement for the first time, and the end point temperature is 1575 ℃; and tapping after blowing is finished.
The detection shows that the tensile strength of the boron-containing steel in the embodiment is 845MPa, the yield strength is 249MPa, the elongation is 13.7 percent, and the fracture toughness is 146.6 MPa.m1/2。
The embodiments of the present invention have been described in detail, but the description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. Any modification, equivalent replacement, and improvement made within the scope of the application of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The boron-containing steel is characterized by comprising the following components in percentage by weight: c: 0.08-0.1%, Si: 0.6-0.7%, Mn: 0.05-0.1%, Sc: 0.01-0.02%, Gd: 0.2% -0.8%, Sb: 0.32% -0.36%, Te: 0.02% -0.03%, Ge: 0.04-0.09%, Ag: 0.001% -0.002%, Sn: 0.005% -0.008%, B: 0.15% -0.16%, Co: 0.002% -0.006%, Mg: 0.003-0.007%, S: 0-0.04%, P: 0-0.04%, Cr: 0-0.25%, Ni: 0-0.3%, Cu: 0 to 0.3%, and the balance Fe.
2. The boron-containing steel of claim 1, further comprising 0.03-0.07% Ca.
3. The boron-containing steel of claim 1, further comprising 0.001-0.002% La.
4. The boron-containing steel of claim 1, further comprising 0.003-0.005% Ti.
5. The boron-containing steel of claim 1, further comprising 0.001% to 0.002% As.
6. The boron-containing steel of claim 1, wherein the volume percent of austenite in the boron-containing steel is from 40% to 45%; the average grain size of austenite in the boron-containing steel is 30 to 40 μm.
7. A method for producing a boron-containing steel according to claim 1, characterized by comprising the steps of:
1) adding a desulfurizing agent into a ladle, placing molten iron with the temperature of 1300-1350 ℃ into the ladle to keep for 20min, and then transferring the molten iron into a smelting furnace;
2) after the materials in the smelting furnace are remelted, controlling the internal pressure of the smelting furnace to be 0.2-0.3 atmospheric pressure by a vacuum pump, controlling the temperature to be 1700 ℃ and keeping for 30min, and then restoring the normal pressure; adding Si, Ge, B and Co with the formula amount from a hopper, cooling to 1300 ℃, and keeping for 15 min;
3) transferring the product obtained in the step 2) into a converter for converting, and setting the bottom blowing strength to be 0.05Nm before blowing3/(t.min), the oxygen supply intensity after oxygen lance blow-on was set to 2Nm3(t.min), the lance position in the blowing process is 2m, the formulated amount of C, Mn, Sc, Gd, Sb, Te, Ag, Sn and Mg is added after blowing is started, the lance position is reduced to 1.5m until the blowing end point after the sublance is subjected to carbon fixation and temperature measurement for the first time, and the end point temperature is 1550-1580 ℃; and tapping after blowing is finished.
8. The preparation method of claim 7, wherein the desulfurizing agent in step 1) comprises the following components in parts by weight: 33-47 parts of calcium carbonate, 22-28 parts of calcium fluoride, 8-18 parts of silicon dioxide, 10-11 parts of aluminum sulfate, 0.2-0.4 part of calcium oxide and 0.3-0.5 part of magnesium oxide; in the step 1), the foundry ladle is in an ultrasonic oscillation environment.
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| CN102492897A (en) * | 2011-12-29 | 2012-06-13 | 钢铁研究总院 | Steel for lower plate of cargo oil tank of tanker |
| CN103194564A (en) * | 2013-03-25 | 2013-07-10 | 济钢集团有限公司 | Process for producing ultra-low phosphorus steel |
| US20200291496A1 (en) * | 2014-03-18 | 2020-09-17 | Innomaq 21, Sociedad Limitada | Extremely high conductivity low cost steel |
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2020
- 2020-12-08 CN CN202011420903.7A patent/CN112680675A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101067185A (en) * | 2007-06-05 | 2007-11-07 | 钢铁研究总院 | A high-temperature long-life self-lubricating wear-resistant alloy material |
| CN102264937A (en) * | 2008-12-24 | 2011-11-30 | 杰富意钢铁株式会社 | Corrosion-resistant steel for crude oil tankers |
| CN102492897A (en) * | 2011-12-29 | 2012-06-13 | 钢铁研究总院 | Steel for lower plate of cargo oil tank of tanker |
| CN103194564A (en) * | 2013-03-25 | 2013-07-10 | 济钢集团有限公司 | Process for producing ultra-low phosphorus steel |
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Application publication date: 20210420 |