CN105420440A - Alloy adding method for medium-manganese or high-manganese alloy steel in smelting with converters - Google Patents
Alloy adding method for medium-manganese or high-manganese alloy steel in smelting with converters Download PDFInfo
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- CN105420440A CN105420440A CN201410480114.0A CN201410480114A CN105420440A CN 105420440 A CN105420440 A CN 105420440A CN 201410480114 A CN201410480114 A CN 201410480114A CN 105420440 A CN105420440 A CN 105420440A
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Abstract
The invention relates to an alloy adding method for medium-manganese or high-manganese alloy steel in smelting with converters. As for the medium-manganese alloy steel, dual smelting with the converters is conducted, the content of tapping P is smaller than or equal to 0.005%, the tapping temperature is higher than or equal to 1640 DEG C, and the content of tapping C is larger than or equal to 0.05%; alloying is conducted behind the converters, manganese-iron alloy is added in a large tank according to the proportion of 60 kg per ton of steel, and remaining manganese-iron alloy is added in the alloy process; argon blowing is conducted after tapping; and manganese-iron alloy is supplemented through a ladle furnace (LF) according to the proportion of 1-10 kg per ton of steel. As for the high-manganese alloy steel, dual smelting with the converters is conducted; alloying is conducted in the converters, in the semisteel state after smelting, when the content of C is equal to 0.04%, the content of P is smaller than or equal to 0.005% and the temperature is 1680+/-10 DEG C, mixed alloy of manganese-iron alloy and aluminium particles is added, oxygen is used for point blowing for 40-60 s, the lance height is 1.5-1.8 m, and the oxygen pressure is 0.8-0.9 MPa; alloying is conducted behind the converters, and manganese-iron alloy is supplemented according to the tapping manganese component; argon blowing is conducted for 2-5 min after tapping; and RH vacuum decarburization is conducted. Through the alloy adding method, the problem that the high-manganese alloy steel cannot be produced by common steel plants can be solved effectively, the high-manganese alloy steel is produced in a converter oxidization mode, the yield of the alloy is high, and the production cost can be greatly reduced.
Description
Technical field
The invention belongs to process for making field, particularly the manganeseirom Adding Way of manganese (3.0% >=Mn >=6.0%) and Gao Meng (Mn > 6.0%) steel alloy in a kind of converter smelting.
Background technology
Along with the development of world economic situation, competition between steel industry is more and more fierce, the target of Special Steel Works pursuit is not only by the high alloy steel grade of production high added value, and also become the direction of common steel mill research, final object is exactly for maximum profit is pursued by enterprise.How converter adds a large amount of Mn alloy, and ensures its stable higher recovery rate, the high Mn steel alloy for high added value produce and cost control particularly important.
At present, smelt high manganese steel and generally adopt electric furnace to produce, domestic each steel mill only has production technique and the exploitation of high Mn steel alloy, there is not yet document and the record of converter producing height Mn steel alloy alloy addition method.
Summary of the invention
The invention provides one utilizes converter to replace electric furnace to produce middle and high manganese alloy steel, its object is intended to solve the problem that general steel mill cannot produce middle and high manganese alloy steel, by adopting different-alloy feed postition, reach the steel alloy producing the different Mn content of tapping, thus raising yield of alloy, effectively reduce production cost.
For this reason, the solution that the present invention takes is:
An alloy addition method for the middle and high manganese alloy steel of converter smelting, its concrete grammar is:
For Mn content 4.5 ~ 5.0% medium manganese steel:
Operational path: after converter duplex smelting-stove, after alloying-stove, soft argon blowing-molten steel is skimmed-LF refining treatment-VD or RH vacuum-treat-continuous casting.
1, converter duplex is smelted, tapping P≤0.005%, tapping temperature >=1640 DEG C, tapping C >=0.05%;
2, alloying after stove, the manganeseirom of 60kg/ ton steel is added in large tank, all the other add in alloy flow process, add-on is: alloy amount in (Fe content requires target/(the theoretical recovery rate of manganese alloy Fe content *)) × (tap/100)-large tank, for ensureing cured effect, baking time controls at 20 ~ 30min.
3, Argon 2 ~ 5min after tapping, to ensure that in large tank, manganese alloy all melts.
4, LF stove adjusting component, adds the manganeseirom of 1 ~ 10kg/ ton steel.
If 5 carbon contents require too low, then enter RH and carry out decarburization.
For Mn content 17 ~ 18% high manganese steel:
Operational path: in converter duplex smelting-stove, after alloying-stove, after alloying-stove, soft argon blowing-molten steel is skimmed-LF refining treatment-RH vacuum-treat-LF stove process-continuous casting.
1, converter duplex is smelted, and adds P≤0.005% before hybrid alloys, tapping temperature >=1640 DEG C, and tapping C is not less than 0.05%.
2, alloying in stove, when converter duplex smelts rear half steel, works as C=0.04%; P≤0.005%; temperature is 1680 ± 10 DEG C time, and add the hybrid alloys that manganeseirom and aluminum shot mix, manganeseirom and aluminum shot ratio are 8:1; add rear oxygen point and blow 40 ~ 60s; rifle position is 1.5 ~ 1.8m, and oxygen pressure 0.8 ~ 0.9MPa, in order to avoid oxygen rifle is beaten missing of ignition; each maximum alloy amount is 10t, adds 3 times continuously.
3, alloying after stove, adds corresponding manganeseirom according to tapping manganese composition.
4, Argon 2 ~ 5min after tapping, makes manganese alloy in large tank all melt;
5, RH vacuum decarburization.
Beneficial effect of the present invention is:
1, the present invention can realize converter mode of oxidizing and produce high manganese steel.
2, converter rephosphorization amount of the present invention is few, and yield of alloy is high, and its manganeseirom recovery rate, on average more than 92%, effectively can reduce production cost.
3, the present invention effectively can solve the problem that general steel mill cannot produce high manganese steel, and market has been widened in the development for Pu Gang enterprise.
Embodiment
Embodiment 1:
Patent smelt Mn content 4.5 ~ 5.0% medium manganese steel SDQ980 the 3rd generation auto sheet:
Operational path is: after converter duplex smelting-stove, after alloying-stove, soft argon blowing-molten steel is skimmed-LF refining treatment-VD or RH vacuum-treat-continuous casting.
1, converter duplex is smelted, and requires tapping P≤0.005%, tapping temperature >=1640 DEG C, and tapping C is not less than 0.05%;
2, alloying after stove, 6t manganeseirom is added in the large tank of 100t, all the other add in alloy flow process, add-on is: alloy amount in (Fe content requires target/(the theoretical recovery rate of manganese alloy Fe content *)) × (tap/100)-large tank, for ensureing cured effect, baking time controls at 30min.
3, Argon 4min after tapping, to ensure that in large tank, manganese alloy all melts.
4, LF stove adjusting component, adds 600kg manganeseirom.
If 5 carbon contents require too low, then enter RH and carry out decarburization.
Embodiment 2:
For Mn content 17 ~ 18% high manganese steel the 4th generation auto sheet:
Operational path: in converter duplex smelting-stove, after alloying-stove, after alloying-stove, soft argon blowing-molten steel is skimmed-LF refining treatment-RH vacuum-treat-LF stove process-continuous casting.
1, converter duplex is smelted, and add front control P≤0.005% of hybrid alloys, tapping temperature >=1640 DEG C, tapping C is not less than 0.05%.
2, alloying in stove, when converter duplex smelts rear half steel, works as C=0.04%; P≤0.005%; temperature is 1680 ± 10 DEG C time, and add the hybrid alloys that manganeseirom and aluminum shot mix, manganeseirom and aluminum shot ratio are 8:1; add rear oxygen point and blow 50s; rifle position is 1.5 ~ 1.8m, and oxygen pressure 0.85MPa, in order to avoid oxygen rifle is beaten missing of ignition; each maximum alloy amount is 10t, adds 3 times continuously.
3, alloying after stove, adds corresponding manganeseirom according to tapping manganese composition.
4, Argon 5min after tapping, makes manganese alloy in large tank all melt;
5, RH vacuum decarburization.
Claims (1)
1. an alloy addition method for the middle and high manganese alloy steel of converter smelting, is characterized in that:
For Mn content 4.5 ~ 5.0% medium manganese steel:
Operational path: after converter duplex smelting-stove, after alloying-stove, soft argon blowing-molten steel is skimmed-LF refining treatment-VD or RH vacuum-treat-continuous casting;
(1) converter duplex is smelted, tapping P≤0.005%, tapping temperature >=1640 DEG C, tapping C >=0.05%;
(2) alloying after stove, the manganeseirom of 60kg/ ton steel is added in large tank, all the other add in alloy flow process, add-on is: alloy amount in (Fe content requires target/(the theoretical recovery rate of manganese alloy Fe content *)) × (tap/100)-large tank, and baking time controls at 20 ~ 30min;
(3) Argon 3 ~ 5min after tapping;
(4) LF stove adjusting component, adds the manganeseirom of 1 ~ 10kg/ ton steel;
(5) if carbon content requires too low, then enter RH and carry out decarburization;
For Mn content 17 ~ 18% high manganese steel:
Operational path: in converter duplex smelting-stove, after alloying-stove, after alloying-stove, soft argon blowing-molten steel is skimmed-LF refining treatment-RH vacuum-treat-LF stove process-continuous casting;
(1) converter duplex is smelted, and adds P≤0.005% before hybrid alloys, tapping temperature >=1640 DEG C, and tapping C is not less than 0.05%;
(2) alloying in stove, when converter duplex smelts rear half steel, work as C=0.04%, P≤0.005%, temperature is 1680 ± 10 DEG C time, add the hybrid alloys that manganeseirom and aluminum shot mix, manganeseirom and aluminum shot ratio are 8:1, add rear oxygen point and blow 40 ~ 60s, rifle position is 1.5 ~ 1.8m, oxygen pressure 0.8 ~ 0.9MPa, each maximum alloy amount is 10t, adds 3 times continuously;
(3) alloying after stove, adds corresponding manganeseirom according to tapping manganese composition;
(4) Argon 2 ~ 5min after tapping, makes manganese alloy in large tank all melt;
(5) RH vacuum decarburization.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410480114.0A CN105420440A (en) | 2014-09-19 | 2014-09-19 | Alloy adding method for medium-manganese or high-manganese alloy steel in smelting with converters |
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| CN201410480114.0A CN105420440A (en) | 2014-09-19 | 2014-09-19 | Alloy adding method for medium-manganese or high-manganese alloy steel in smelting with converters |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108384920A (en) * | 2018-03-03 | 2018-08-10 | 首钢集团有限公司 | A kind of low-phosphorous low-sulfur high alloy heavy slab smelting process |
| CN109112248A (en) * | 2017-06-26 | 2019-01-01 | 鞍钢股份有限公司 | A kind of converter smelting method of potassium steel |
| CN111394644A (en) * | 2020-04-24 | 2020-07-10 | 南京钢铁股份有限公司 | Rapid alloying process for high-manganese austenitic steel used at low temperature |
| CN112226569A (en) * | 2020-10-10 | 2021-01-15 | 鞍钢股份有限公司 | Alloying method for producing high alloy steel by converter |
| CN113584255A (en) * | 2021-08-03 | 2021-11-02 | 攀钢集团西昌钢钒有限公司 | Method for efficient and economic manganese alloying of medium and high manganese steel |
| CN114196795A (en) * | 2020-09-17 | 2022-03-18 | 上海梅山钢铁股份有限公司 | Method for controlling alloy addition amount in converter tapping process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112248A (en) * | 2017-06-26 | 2019-01-01 | 鞍钢股份有限公司 | A kind of converter smelting method of potassium steel |
| CN108384920A (en) * | 2018-03-03 | 2018-08-10 | 首钢集团有限公司 | A kind of low-phosphorous low-sulfur high alloy heavy slab smelting process |
| CN111394644A (en) * | 2020-04-24 | 2020-07-10 | 南京钢铁股份有限公司 | Rapid alloying process for high-manganese austenitic steel used at low temperature |
| CN114196795A (en) * | 2020-09-17 | 2022-03-18 | 上海梅山钢铁股份有限公司 | Method for controlling alloy addition amount in converter tapping process |
| CN112226569A (en) * | 2020-10-10 | 2021-01-15 | 鞍钢股份有限公司 | Alloying method for producing high alloy steel by converter |
| CN113584255A (en) * | 2021-08-03 | 2021-11-02 | 攀钢集团西昌钢钒有限公司 | Method for efficient and economic manganese alloying of medium and high manganese steel |
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Application publication date: 20160323 |