CN103741023B - A kind of smelting process of nonmagnetic steel - Google Patents
A kind of smelting process of nonmagnetic steel Download PDFInfo
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- CN103741023B CN103741023B CN201410000929.4A CN201410000929A CN103741023B CN 103741023 B CN103741023 B CN 103741023B CN 201410000929 A CN201410000929 A CN 201410000929A CN 103741023 B CN103741023 B CN 103741023B
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Abstract
A smelting process for nonmagnetic steel, electric furnace steel tapping, with argon flow amount>=100m
3/ h stirs molten steel power transmission refining after 2 minutes; With argon gas stream 20-30m
3the intensity power transmission of/h, when liquid steel temperature>=1600 DEG C, has a power failure and adds manganese, with argon flow amount>=100m
3the intensity of/h, stirs molten steel power transmission refining again in 2 minutes; At argon gas stream 20-30m
3power transmission under the condition of/h, adds aluminium shot 300kg, aluminium powder 100kg reduces when liquid steel temperature>=1560 DEG C; Reduce 10 minutes and liquid steel temperature>=1650 DEG C time, sampling analysis chemical composition, at argon flow amount>=80m
3aluminum steel is fed under the intensity of/h; Power transmission under the intensity of argon flow amount>=80m3/h also adds aluminium powder 200kg, reduces 10 minutes; Electric power feeding time>=20 minute, when liquid steel temperature is 1640-1650 DEG C, terminate refining.Steel ingot qualification rate of the present invention is 97.09%.
Description
Technical field
The invention belongs to metallurgy industry smelting technology, be specifically related to a kind of smelting process of nonmagnetic steel.
Background technology
In smelt nonmagnetic steel process, pour into a mould bad in the casting process of molten steel, cause a large amount of waste products, its steel ingot qualification rate is 94.43%.
Summary of the invention
The object of the invention is to improve steel ingot qualification rate, reducing costs, create economic benefit.
The chemical composition mass percent of nonmagnetic steel is C be 0.14-0.20, Si≤0.50, Mn be 21.5-25.0, P≤0.030, S≤0.030, Al be 1.50-2.50, V is 0.04-0.10, and all the other are iron and inevitable impurity.
The present invention includes the refining of LF refining furnace, it is characterized in that: by adopting the method for " first high temperature melting alloy, rear high temperature reduction, control by stages argon flow amount ", making the Al in refining process in steel
2o
3inclusion reduces generation as far as possible, and makes the Al in steel by the stirring of argon gas
2o
3inclusion floats to rapidly in slag, reaches and reduces Al in steel
2o
3inclusion, stops ladle nozzle blocking, the object that molten steel is poured into a mould smoothly.
After arc furnace tapping, with argon flow amount>=100m
3the intensity of/h, stir molten steel after 2 minutes bull ladle enter the refining of LF refining furnace station power transmission; With argon gas stream 20-30m
3the intensity power transmission of/h, when liquid steel temperature>=1600 DEG C, has a power failure and adds manganese metal, with argon flow amount>=100m
3the intensity of/h, stirs molten steel power transmission refining again in 2 minutes; After manganese metal all adds, at argon gas stream 20-30m
3power transmission under the condition of/h, adds aluminium shot 300kg, aluminium powder 100kg reduces when liquid steel temperature>=1560 DEG C; Add aluminium shot, aluminum reduction 10 minutes and liquid steel temperature>=1650 DEG C time, sampling analysis chemical composition, chemical composition out has a power failure afterwards, at argon flow amount>=80m
3aluminum steel is fed under the intensity of/h; Feed aluminum steel complete, buggy ladle is left back LF refining furnace station, power transmission under the intensity of argon flow amount>=80m3/h also adds aluminium powder 200kg, and power transmission is reduced after 10 minutes and sampled;
Feed aluminum steel complete, electric power feeding time >=20 minute, when liquid steel temperature is 1640-1650 DEG C, terminates refining, enter next procedure.
The present invention makes the Al in molten steel by the stirring of argon gas
2o
3inclusion floats to rapidly in slag, decreases Al in steel
2o
3inclusion, avoids nozzle clogging, and ladle nozzle blocks, and make pouring molten steel smooth, thus the steel ingot qualification rate that the present invention is smelted is 97.09%.
Embodiment
The smelting trade mark of the present embodiment is the chemical composition mass percent of 20Mn23AlV nonmagnetic steel be C be 0.14-0.20, Si≤0.50, Mn is 21.5-25.0, P≤0.030, S≤0.030, Al is 1.50-2.50, V is 0.04-0.10, and all the other are iron and inevitable impurity.
1, after arc furnace tapping, molten steel in ladle, with argon flow amount>=100m
3the intensity of/h, stirred molten steel after 2 minutes, stopped stirring.
2, ladle is entered the refining of LF refining furnace station power transmission:
(1) with argon gas stream 20-30m
3the intensity power transmission of/h, when liquid steel temperature>=1600 DEG C, has a power failure, adds manganese metal, with argon flow amount>=100m
3the intensity of/h, stirs molten steel power transmission refining again in 2 minutes.
(2) after manganese metal all adds, at argon gas stream 20-30m
3feeding temperature-raising deposite metal manganese under the condition of/h.
(3) add aluminium shot 300kg when liquid steel temperature >=1560 DEG C, aluminium powder 100kg reduces.
(4) add aluminium shot, aluminum reduction 10 minutes and liquid steel temperature >=1650 DEG C time, sampling analysis chemical composition.
(5) chemical composition out has a power failure afterwards, at argon flow amount>=80m
3in molten steel, aluminum steel is fed under the intensity of/h.
(6) feed aluminum steel complete, power transmission under the intensity of argon flow amount >=80m3/h also adds aluminium powder 200kg, and power transmission is reduced after 10 minutes and sampled.
(7) electric power feeding time >=20 minute after hello aluminum steel, when liquid steel temperature is 1640-1650 DEG C, terminates refining, enter next procedure.
Claims (1)
1. the smelting process of a nonmagnetic steel, comprise the refining of LF refining furnace, it is characterized in that the chemical composition mass percent of described nonmagnetic steel be C is 0.14-0.20, Si≤0.50, Mn is 21.5-25.0, P≤0.030, S≤0.030, Al is 1.50-2.50, V is 0.04-0.10, and all the other are iron and inevitable impurity; After arc furnace tapping, with argon flow amount>=100m
3the intensity of/h, stir molten steel after 2 minutes bull ladle enter the refining of LF refining furnace station power transmission; With argon gas stream 20-30m
3the intensity power transmission of/h, when liquid steel temperature>=1600 DEG C, has a power failure and adds manganese metal, with argon flow amount>=100m
3the intensity of/h, stirs molten steel power transmission refining again in 2 minutes; After manganese metal all adds, at argon gas stream 20-30m
3power transmission under the condition of/h, adds aluminium shot 300kg, aluminium powder 100kg reduces when liquid steel temperature>=1560 DEG C; Add aluminium shot, aluminum reduction 10 minutes and liquid steel temperature>=1650 DEG C time, sampling analysis chemical composition, chemical composition out has a power failure afterwards, at argon flow amount>=80m
3aluminum steel is fed under the intensity of/h; Feed aluminum steel complete, buggy ladle is left back LF refining furnace station, at argon flow amount>=80m
3power transmission under the intensity of/h also adds aluminium powder 200kg, and power transmission is reduced after 10 minutes and sampled;
Feed aluminum steel complete, electric power feeding time >=20 minute, when liquid steel temperature is 1640-1650 DEG C, terminates refining, enter next procedure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410000929.4A CN103741023B (en) | 2014-01-02 | 2014-01-02 | A kind of smelting process of nonmagnetic steel |
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| CN201410000929.4A CN103741023B (en) | 2014-01-02 | 2014-01-02 | A kind of smelting process of nonmagnetic steel |
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| CN103741023A CN103741023A (en) | 2014-04-23 |
| CN103741023B true CN103741023B (en) | 2015-09-23 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104109800B (en) * | 2014-07-03 | 2016-06-29 | 武汉钢铁(集团)公司 | High intensity is containing vanadium height manganese nonmagnetic steel and production method thereof |
| CN108796383A (en) * | 2017-04-27 | 2018-11-13 | 宝山钢铁股份有限公司 | A kind of titaniferous high-intensity and high-tenacity nonmagnetic steel and its manufacturing method |
| CN108580911B (en) * | 2018-05-02 | 2021-04-20 | 山东鲁银新材料科技有限公司 | Preparation method of high-manganese non-magnetic steel powder |
| CN110747399B (en) * | 2019-11-13 | 2020-11-03 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Controlled rolling and controlled cooling production method of high-yield-ratio high-manganese high-aluminum nonmagnetic steel plate |
| CN114990438B (en) * | 2022-05-31 | 2023-10-20 | 江西宝顺昌特种合金制造有限公司 | High-manganese high-aluminum low-magnetic austenitic steel and manufacturing method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101376915B (en) * | 2008-09-29 | 2010-11-03 | 山西太钢不锈钢股份有限公司 | Method for smelting high-alumina non-magnetic steel |
| US20110152420A1 (en) * | 2009-12-22 | 2011-06-23 | Mark Elkovitch | Poly(arylene ether)/polyamide compositions, methods, and articles |
| CN102021273B (en) * | 2010-12-30 | 2012-03-21 | 安阳钢铁股份有限公司 | Fluidness control method of molten low-silicon aluminized steel of square billet |
| CN103014221B (en) * | 2012-12-17 | 2015-04-08 | 莱芜钢铁集团有限公司 | Method for producing high-aluminum steel plate blanks |
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