CN107619984A - A kind of production method of high pressure smelting high-nitrogen steel - Google Patents
A kind of production method of high pressure smelting high-nitrogen steel Download PDFInfo
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- CN107619984A CN107619984A CN201710913644.3A CN201710913644A CN107619984A CN 107619984 A CN107619984 A CN 107619984A CN 201710913644 A CN201710913644 A CN 201710913644A CN 107619984 A CN107619984 A CN 107619984A
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Abstract
The invention discloses a kind of production method of high pressure smelting high-nitrogen steel, comprise the following steps that：S1：Derusting；S2：Cleaning；S3：Melting；S4：Add nitrogenized manganese；S5：Cooling；S6：Add ammonia and nitrogen；S6：Insulation, cooling；S7：Secondary cooling.Compared to traditional normal temperature smelting process, the high nitrogen steel nitrogen content that the present invention produces substantially increases, and surface is more smooth, the high nitrogen steel produced using the present invention, the mass fraction control of nitrogen is between 0.356% 0.425%, nitrogen content is high, and production process is quick, simple, greatly increases the production efficiency of enterprise.In addition, this method is simple, it is easily operated, and yield is high, high yield rate, has been effectively saved the production cost of enterprise.
Description
Technical field
The present invention is specifically a kind of production method of high pressure smelting high-nitrogen steel, belongs to smelting steel technical field.
Background technology
Steel industry is constantly in critical role in China's heavy industry development, with the development of steel industry, high nitrogen steel
Increasingly paid close attention to by steel industry.High nitrogen steel is a kind of special rolling-mill section of superior performance, not only have higher stabilization and
Expand the ability of austenite phase field, also can effectively lift hardness of steel, and hardness, high nitrogen will not be produced to the plasticity and toughness of steel
Steel decay resistance is also particularly pertinent, is widely used in the necks such as automobile making, international airline, chemical industry biology and construction project
Domain.But the technology of smelting high-nitrogen steel steel is also immature at present, smelting process is more complicated, low production efficiency, and nitrogen content is not
Height, this is greatly lowered the performance of high nitrogen steel.
The content of the invention
For technical problem existing for above-mentioned background technology, the present invention provides a kind of producer of high pressure smelting high-nitrogen steel
Method, nitrogen content is high, and smelting process is simple, and the used time is few, and high yield rate, can effectively ensure the nitrogen content in steel.
To achieve these goals, a kind of production method of high pressure smelting high-nitrogen steel of the present invention, is comprised the following steps that：
S1：Derusting：Waste and old steel is cut, and the steel of well cutting is put into derusting pond, rust removing solution is imported into pond
And water, the mixing liquid of rust removing solution and water is covered wastes of iron and steel；, 5h-6h is also soaked, water temperature is maintained at 40 DEG C -50 DEG C；
S2：Cleaning：Delivery port is opened, the anti-emptying of interior water in pond that derusts is sling steel with crane, and steel is entered with High Pressure Gun
Row rinses, until the residue liquid on steel is rinsed totally；
S3：Melting：The steel rinsed well is put into induction furnace and carries out high melt, in-furnace temperature be 1100 DEG C-
1300 DEG C, smelting time 48h-72h；
S4：Add nitrogenized manganese：Molten steel after melting is released from the outlet of induction furnace, flowed into by pipeline in reactor,
Nitrogenized manganese is added in reactor, reacted with mixing of molten steel, seals reactor, pressure is maintained at 8*10-2-4*103Pa
Between, reaction time 4h-8h, temperature is maintained between 1500 DEG C -2000 DEG C；
S5：Cooling：Reactor is cooled down by water-cooling pattern, more than 300 DEG C of chilling temperature control is then gradual again
Heat up, reactor is evacuated in temperature-rise period, when reactor temperature reaches more than 1000 DEG C, stopping evacuates, reactor
Interior vacuum degree control is in 60-70Pa；
S6：Add ammonia and nitrogen：Ammonia and nitrogen are added into reactor by valve, wait nitrogen in liquid to reach saturation
Afterwards, begin to cool down, until the molten steel in reactor is in half curdled appearance；
S6：Insulation, cooling：The molten steel of half curdled appearance obtained to step (S6) is incubated, soaking time 48h-
72h；
S7：Secondary cooling：After soaking time terminates, it is cooled to room temperature and high nitrogen steel is made.
Preferably, the ratio of rust removing solution and water is 1 in step (S1):50.
Preferably, the ratio of ammonia and nitrogen is：2:3.
Compared to traditional normal temperature smelting process, the high nitrogen steel nitrogen content that the present invention produces substantially increases, and surface ratio
High nitrogen steel that is more smooth, being produced using the present invention, the mass fraction of nitrogen are controlled between 0.356%-0.425%, nitrogen content
Height, production process is quick, simple, greatly increases the production efficiency of enterprise.In addition, this method is simple, it is easily operated, and produce
Amount is high, high yield rate, has been effectively saved the production cost of enterprise.
Embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1：
A kind of production method of high pressure smelting high-nitrogen steel, is comprised the following steps that：
S1：Derusting：Waste and old steel is cut, and the steel of well cutting is put into derusting pond, rust removing solution is imported into pond
And water, the mixing liquid of rust removing solution and water is covered wastes of iron and steel；, 5h is also soaked, water temperature is maintained at 40 DEG C, the rust removing solution
Ratio with water is 1:50；
S2：Cleaning：Delivery port is opened, the anti-emptying of interior water in pond that derusts is sling steel with crane, and use High Pressure Gun
Steel is rinsed, until the residue liquid on steel is rinsed totally；
S3：Melting：The steel rinsed well is put into induction furnace and carries out high melt, in-furnace temperature is 1100 DEG C, is melted
The refining time is 48h；
S4：Add nitrogenized manganese：Molten steel after melting is released from the outlet of induction furnace, flowed into by pipeline in reactor,
Nitrogenized manganese is added in reactor, reacted with mixing of molten steel, seals reactor, pressure is maintained at 8*10-2Between Pa, instead
It is 4h between seasonable, temperature is maintained between 1500 DEG C；
S5：Cooling：Reactor is cooled down by water-cooling pattern, chilling temperature is 350 DEG C, then gradually heating again,
Reactor is evacuated in temperature-rise period, when reactor temperature reaches 1050 DEG C, stopping evacuates, vacuum control in reactor
System is in 60Pa；
S6：Add ammonia and nitrogen：Ammonia and nitrogen are added into reactor by valve, wait nitrogen in liquid to reach saturation
Afterwards, begin to cool down, until the molten steel in reactor is in half curdled appearance, the ratio of ammonia and nitrogen is：2:3；
S6：Insulation, cooling：The molten steel of half curdled appearance obtained to step (S6) is incubated, soaking time 48h；
S7：Secondary cooling：After soaking time terminates, it is cooled to room temperature and high nitrogen steel is made.
Embodiment 2：
A kind of production method of high pressure smelting high-nitrogen steel, is comprised the following steps that：
S1：Derusting：Waste and old steel is cut, and the steel of well cutting is put into derusting pond, rust removing solution is imported into pond
And water, the mixing liquid of rust removing solution and water is covered wastes of iron and steel；, also soak 5.5h, water temperature is maintained at 45 DEG C, rust removing solution and
The ratio of water is 1:50, this ratio derusting effect is best；
S2：Cleaning：Delivery port is opened, the anti-emptying of interior water in pond that derusts is sling steel with crane, and use High Pressure Gun
Steel is rinsed, until the residue liquid on steel is rinsed totally；
S3：Melting：The steel rinsed well is put into induction furnace and carries out high melt, in-furnace temperature is 1200 DEG C, is melted
The refining time is 48h-72h；
S4：Add nitrogenized manganese：Molten steel after melting is released from the outlet of induction furnace, flowed into by pipeline in reactor,
Nitrogenized manganese is added in reactor, reacted with mixing of molten steel, seals reactor, pressure is maintained at 2*102Between Pa, instead
It is 6h between seasonable, temperature is maintained between 1700 DEG C；
S5：Cooling：Reactor is cooled down by water-cooling pattern, chilling temperature is to 600 DEG C, then gradually heating again,
Reactor is evacuated in temperature-rise period, when reactor temperature reaches 1100 DEG C, stopping evacuates, vacuum control in reactor
System is in 60-70Pa；
S6：Add ammonia and nitrogen：Ammonia and nitrogen are added into reactor by valve, wait nitrogen in liquid to reach saturation
Afterwards, begin to cool down, until the molten steel in reactor is in half curdled appearance, the ratio of ammonia and nitrogen is：2:3, nitrogen can be made more
Good fusion is in molten steel；
S6：Insulation, cooling：The molten steel of half curdled appearance obtained to step (S6) is incubated, soaking time 60h；
S7：Secondary cooling：After soaking time terminates, it is cooled to room temperature and high nitrogen steel is made.
Embodiment 3：
A kind of production method of high pressure smelting high-nitrogen steel, is comprised the following steps that：
S1：Derusting：Waste and old steel is cut, and the steel of well cutting is put into derusting pond, rust removing solution is imported into pond
And water, the mixing liquid of rust removing solution and water is covered wastes of iron and steel；, also soak 6h, water temperature is maintained at 50 DEG C, rust removing solution and water
Ratio be 1:50；
S2：Cleaning：Delivery port is opened, the anti-emptying of interior water in pond that derusts is sling steel with crane, and use High Pressure Gun
Steel is rinsed, until the residue liquid on steel is rinsed totally；
S3：Melting：The steel rinsed well is put into induction furnace and carries out high melt, in-furnace temperature is 1300 DEG C, is melted
The refining time is 72h；
S4：Add nitrogenized manganese：Molten steel after melting is released from the outlet of induction furnace, flowed into by pipeline in reactor,
Nitrogenized manganese is added in reactor, reacted with mixing of molten steel, seals reactor, pressure is maintained at 4*103Between Pa, instead
It is 8h between seasonable, temperature is maintained between 2000 DEG C；
S5：Cooling：Reactor is cooled down by water-cooling pattern, more than 300 DEG C of chilling temperature control is then gradual again
Heat up, reactor is evacuated in temperature-rise period, when reactor temperature reaches more than 1000 DEG C, stopping evacuates, reactor
Interior vacuum degree control is in 70Pa；
S6：Add ammonia and nitrogen：Ammonia and nitrogen are added into reactor by valve, wait nitrogen in liquid to reach saturation
Afterwards, begin to cool down, until the molten steel in reactor is in half curdled appearance, the ratio of ammonia and nitrogen is：2:3；
S6：Insulation, cooling：The molten steel of half curdled appearance obtained to step (S6) is incubated, soaking time 72h；
S7：Secondary cooling：After soaking time terminates, it is cooled to room temperature and high nitrogen steel is made.
Easily operated, high yield rate of the invention, the production efficiency height of enterprise is effectively improved, reduces being produced into for enterprise
This.
Claims (3)
1. a kind of production method of high pressure smelting high-nitrogen steel, it is characterised in that comprise the following steps that：
S1：Derusting：Waste and old steel is cut, and the steel of well cutting is put into derusting pond, rust removing solution and water are imported into pond,
The mixing liquid of rust removing solution and water is set to cover wastes of iron and steel；, 5h-6h is also soaked, water temperature is maintained at 40 DEG C -50 DEG C；
S2：Cleaning：Delivery port is opened, the anti-emptying of interior water in pond that derusts is sling steel with crane, and with High Pressure Gun to steel
Iron is rinsed, until the residue liquid on steel is rinsed totally；
S3：Melting：The steel rinsed well is put into induction furnace and carries out high melt, in-furnace temperature is 1100 DEG C -1300 DEG C,
Smelting time is 48h-72h；
S4：Add nitrogenized manganese：Molten steel after melting is released from the outlet of induction furnace, flowed into by pipeline in reactor, by nitrogen
Change manganese to be added in reactor, reacted with mixing of molten steel, seal reactor, pressure is maintained at 8*10-2-4*103Between Pa,
Reaction time is 4h-8h, and temperature is maintained between 1500 DEG C -2000 DEG C；
S5：Cooling：Reactor is cooled down by water-cooling pattern, chilling temperature controls more than 300 DEG C, then gradually rises again
Temperature, reactor is evacuated in temperature-rise period, when reactor temperature reaches more than 1000 DEG C, stop evacuating, in reactor
Vacuum degree control is in 60-70Pa；
S6：Add ammonia and nitrogen：Ammonia and nitrogen are added into reactor by valve, waited after nitrogen reaches saturation in liquid,
Begin to cool down, until the molten steel in reactor is in half curdled appearance；
S6：Insulation, cooling：The molten steel of half curdled appearance obtained to step (S6) is incubated, soaking time 48h-72h；
S7：Secondary cooling：After soaking time terminates, it is cooled to room temperature and high nitrogen steel is made.
2. the production method of high pressure smelting high-nitrogen steel according to claim 1, it is characterised in that removed in the step (S1)
The ratio of rust liquid and water is 1:50.
3. the production method of high pressure smelting high-nitrogen steel according to claim 1 or 2, it is characterised in that the ammonia and nitrogen
The ratio of gas is：2:3.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110343815A (en) * | 2018-04-08 | 2019-10-18 | 吉林常春高氮合金研发中心有限公司 | A method of improving useless high nitrogen steel mechanical property |
| CN114182161A (en) * | 2021-11-22 | 2022-03-15 | 华北理工大学 | Method for producing high-nitrogen high-manganese steel by quickly solidifying molten steel and inhibiting nitrogen from escaping |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0770691A (en) * | 1993-08-31 | 1995-03-14 | Daido Steel Co Ltd | Production of high nitrogen steel |
| JP2003055709A (en) * | 2001-08-10 | 2003-02-26 | Daido Steel Co Ltd | Method for manufacturing high-nitrogen steel |
| CN103924031A (en) * | 2014-04-22 | 2014-07-16 | 钢铁研究总院 | Method for smelting high-nitrogen steel by vacuum induction positive-pressure furnace |
| CN104862447A (en) * | 2015-04-30 | 2015-08-26 | 昆明理工大学 | Preparation method of high nitrogen steel |
| CN106591682A (en) * | 2016-12-02 | 2017-04-26 | 机械科学研究总院青岛分院 | Method for smelting high-nitrogen steel in two steps under normal pressure |
-
2017
- 2017-09-30 CN CN201710913644.3A patent/CN107619984A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0770691A (en) * | 1993-08-31 | 1995-03-14 | Daido Steel Co Ltd | Production of high nitrogen steel |
| JP2003055709A (en) * | 2001-08-10 | 2003-02-26 | Daido Steel Co Ltd | Method for manufacturing high-nitrogen steel |
| CN103924031A (en) * | 2014-04-22 | 2014-07-16 | 钢铁研究总院 | Method for smelting high-nitrogen steel by vacuum induction positive-pressure furnace |
| CN104862447A (en) * | 2015-04-30 | 2015-08-26 | 昆明理工大学 | Preparation method of high nitrogen steel |
| CN106591682A (en) * | 2016-12-02 | 2017-04-26 | 机械科学研究总院青岛分院 | Method for smelting high-nitrogen steel in two steps under normal pressure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110343815A (en) * | 2018-04-08 | 2019-10-18 | 吉林常春高氮合金研发中心有限公司 | A method of improving useless high nitrogen steel mechanical property |
| CN114182161A (en) * | 2021-11-22 | 2022-03-15 | 华北理工大学 | Method for producing high-nitrogen high-manganese steel by quickly solidifying molten steel and inhibiting nitrogen from escaping |
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Application publication date: 20180123 |