CN107541638A - A kind of method that microwave vacuum stove smelts nickel alloy - Google Patents
A kind of method that microwave vacuum stove smelts nickel alloy Download PDFInfo
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- CN107541638A CN107541638A CN201610461588.XA CN201610461588A CN107541638A CN 107541638 A CN107541638 A CN 107541638A CN 201610461588 A CN201610461588 A CN 201610461588A CN 107541638 A CN107541638 A CN 107541638A
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Abstract
The pure iron for accounting for gross weight 42%~52%, by the requirement of pure iron in the steel grade smelted in advance, is first fitted into crucible by the method that a kind of microwave vacuum stove provided by the invention smelts nickel alloy, then fills and loads chromium and nickel in crucible, then remaining pure iron is fitted into crucible；To in the hopper of microwave vacuum stove load weight than be respectively total charge 0.001~0.4% aluminium and 0.1~1.45% manganese；Close fire door, the atmospheric pressure value P being evacuated in microwave vacuum stove stove0During≤0.6Pa, Microwave-assisted firing, when the temperature in stove reaches 550 DEG C~650 DEG C, and when in stove during atmospheric pressure value 0.20Pa or so, aluminium is added；Continue to heat, when in-furnace temperature reaches 650 DEG C~950 DEG C, after keeping heating 30~50 minutes, add manganese；When the percentage by weight of S, P in molten steel, which reach, to be required, tapping.It is low that this method smelts oxygen in the nickel alloy, sulphur and phosphorus impurities content.
Description
Technical field
The present invention relates to a kind of method that microwave vacuum stove smelts nickel alloy.
Background technology
The vacuum induction furnace smelting technique being commonly used is carried out in fused magnesite or corundum crucible, and design feature determines that it does not have slag making function, therefore can not effectively remove the impurity elements such as the sulphur being harmful in molten steel, phosphorus.In addition, the refractory material such as fused magnesite and corundum is decomposed under smelting temperature, and decomposition pressure is higher, and the oxygen in catabolite improves the oxygen contents of final products after entering molten steel, so as to be degrading the combination property of material, causes the impurity content in product higher.
Traditional mode of heating easily produces the pollutants such as flue gas, while heat waste is also than more serious, is unfavorable for building friendly and smelts.And microwave smelts the waste that will not then produce flue gas, substantial amounts of heat, popularity comes.
The content of the invention
The purpose of the present invention is smelted using Microwave-assisted firing, while reducing pollution and heat waste, reduces the content of the impurity such as oxygen, sulphur and phosphorus in nickel alloy.
For the above-mentioned purpose, the invention provides a kind of method that microwave vacuum stove smelts nickel alloy, it is characterised in that comprises the following steps：
1）, by the requirement of pure iron in the steel grade smelted in advance, first the pure iron for accounting for gross weight 42%~52% is fitted into crucible, loads chromium and nickel in then filling toward the crucible, then remaining pure iron is fitted into the crucible；
2）, in the hopper of microwave vacuum stove load weight than be respectively total charge 0.001~0.4% aluminium and 0.1~1.45% manganese；
3）, close fire door, start pump machine, the atmospheric pressure value P being evacuated in the microwave vacuum stove stove0During≤0.6Pa, by aiding in heating around the microwave generator being evenly arranged on the furnace chamber outer wall of the microwave vacuum stove, when the temperature in the microwave vacuum stove stove reaches 550 DEG C~650 DEG C, and atmospheric pressure value P in stove1：0.18 Pa≦P1During≤0.25Pa, the aluminium in the hopper is added in the furnace chamber；
4）, continue auxiliary heating by the microwave generator, when the in-furnace temperature reaches 650 DEG C~950 DEG C, after keeping heating 30~50 minutes, the manganese metal that adds in the hopper；
5）, when S, P in molten steel percentage by weight up to it is following require when, close microwave generator stop heating, tapping：That is S≤0.001%；P≤0.008%.
2nd, a kind of microwave vacuum stove as claimed in claim 1 smelts the method for nickel alloy, it is characterised in that：The nickel being fitted into crucible is nickel cake of nickel beans or diameter of the diameter between 3mm and 5mm between 2cm and 6cm；
The aluminium loaded in hopper is the aluminium powder of the aluminum shot or 50~100 mesh between 3mm and 5mm.
3rd, a kind of microwave vacuum stove as claimed in claim 1 smelts the method for nickel alloy, it is characterised in that：The step 3）In, when the in-furnace temperature reaches 550 DEG C~650 DEG C, argon gas is advertised into the stove.
4th, a kind of microwave vacuum stove as claimed in claim 3 smelts the method for nickel alloy, it is characterised in that：The argon gas is advertised from the bottom of furnace body and side wall.
It is an advantage of the invention that：Microwave-assisted firing improves the temperature rise of smelting process, improves the purity of discharging, and it is low to smelt oxygen in the nickel alloy, sulphur and phosphorus impurities content.
Embodiment
While in order to reduce pollution and heat waste, reduce the content of the impurity such as oxygen, sulphur and phosphorus in nickel alloy, present embodiments provide a kind of method that microwave vacuum stove smelts nickel alloy, mainly by carrying out Microwave-assisted firing by microwave generator, the quick temperature for improving material, shorten the reaction time, reduce the generation of flue dust and the waste of heat, while the impurity content in the control reduction nickel alloy for passing through in-furnace temperature.Specifically smelting step is：
1）, by the requirement of pure iron in the steel grade smelted in advance, first the pure iron for accounting for gross weight 42%~52% is fitted into crucible, loads chromium and nickel in then filling toward the crucible, then remaining pure iron is fitted into the crucible；
2）, in the hopper of microwave vacuum stove load weight than be respectively total charge 0.001~0.4% aluminium and 0.1~1.45% manganese；
3）, close fire door, start pump machine, the atmospheric pressure value P being evacuated in the microwave vacuum stove stove0During≤0.6Pa, by aiding in heating around the microwave generator being evenly arranged on the furnace chamber outer wall of the microwave vacuum stove, when the temperature in the microwave vacuum stove stove reaches 550 DEG C~650 DEG C, and atmospheric pressure value P in stove1：0.18 Pa≦P1During≤0.25Pa, the aluminium in the hopper is added in the furnace chamber；
4）, continue auxiliary heating by the microwave generator, when the in-furnace temperature reaches 650 DEG C~950 DEG C, after keeping heating 30~50 minutes, the manganese metal that adds in the hopper；
5）, when S, P in molten steel percentage by weight up to it is following require when, close microwave generator stop heating, tapping：That is S≤0.001%；P≤0.008%.
Wherein, the nickel being fitted into crucible is nickel cake of nickel beans or diameter of the diameter between 3mm and 5mm between 2cm and 6cm；The aluminium loaded in hopper is the aluminium powder of the aluminum shot or 50~100 mesh between 3mm and 5mm.
And when the in-furnace temperature reaches 550 DEG C~650 DEG C, argon gas is advertised into the stove, carries out the protection of inert gas, it is ensured that vacuum, therefore, argon gas is advertised from bottom of furnace body and side wall can obtain more preferable atmosphere of inert gases.
Embodiment two：
Into composite crucible, order loads 16.62kg pure iron, then load 26.06kg crome metal, 5.63kg nickel cake, molybdenum content 56% 5.62kg molybdenum-iron and copper 1.68kg, after complete, according to the requirement for the steel smelted in advance, load remaining pure iron 15.16kg, then 0.024kg aluminium powders and 1.3kg manganese are loaded into hopper, fire door is closed, is vacuumized, as atmospheric pressure value P in stove0For 0.4Pa when, pass through microwave generator auxiliary heating so that the temperature in stove reaches 600 DEG C, and atmospheric pressure value P in stove1For 0.2Pa when, add aluminium powder；When continuing to be heated to 750 ° of in-furnace temperature, stablize 40 minutes, add manganese, tapped when the percentage by weight of S, P and O in molten steel are up to following require, i.e. S=0.00059%；P=0.00159%；O=0.00105%.
Using this smelting process compared with conventional method, have：Microwave-assisted firing improves the temperature rise of smelting process, improves the purity of discharging, and it is low to smelt oxygen in the nickel alloy, sulphur and phosphorus impurities content.
Claims (4)
1. a kind of method that microwave vacuum stove smelts nickel alloy, it is characterised in that comprise the following steps：
1）, by the requirement of pure iron in the steel grade smelted in advance, first the pure iron for accounting for gross weight 42%~52% is fitted into crucible, loads chromium and nickel in then filling toward the crucible, then remaining pure iron is fitted into the crucible；
2）, in the hopper of microwave vacuum stove load weight than be respectively total charge 0.001~0.4% aluminium and 0.1~1.45% manganese；
3）, close fire door, start pump machine, the atmospheric pressure value P being evacuated in the microwave vacuum stove stove0During≤0.6Pa, by aiding in heating around the microwave generator being evenly arranged on the furnace chamber outer wall of the microwave vacuum stove, when the temperature in the microwave vacuum stove stove reaches 550 DEG C~650 DEG C, and atmospheric pressure value P in stove1：0.18 Pa≦P1During≤0.25Pa, the aluminium in the hopper is added in the furnace chamber；
4）, continue auxiliary heating by the microwave generator, when the in-furnace temperature reaches 650 DEG C~950 DEG C, after keeping heating 30~50 minutes, the manganese metal that adds in the hopper；
5）, when S, P in molten steel percentage by weight up to it is following require when, close microwave generator stop heating, tapping：That is S≤0.001%；P≤0.008%.
2. the method that a kind of microwave vacuum stove as claimed in claim 1 smelts nickel alloy, it is characterised in that：The nickel being fitted into crucible is nickel cake of nickel beans or diameter of the diameter between 3mm and 5mm between 2cm and 6cm；
The aluminium loaded in hopper is the aluminium powder of the aluminum shot or 50~100 mesh between 3mm and 5mm.
3. the method that a kind of microwave vacuum stove as claimed in claim 1 smelts nickel alloy, it is characterised in that：The step 3）In, when the in-furnace temperature reaches 550 DEG C~650 DEG C, argon gas is advertised into the stove.
4. the method that a kind of microwave vacuum stove as claimed in claim 3 smelts nickel alloy, it is characterised in that：The argon gas is advertised from the bottom of furnace body and side wall.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610461588.XA CN107541638A (en) | 2016-06-23 | 2016-06-23 | A kind of method that microwave vacuum stove smelts nickel alloy |
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| CN201610461588.XA CN107541638A (en) | 2016-06-23 | 2016-06-23 | A kind of method that microwave vacuum stove smelts nickel alloy |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020153119A1 (en) * | 2001-04-19 | 2002-10-24 | Mitsubishi Denki Kabushiki Kaisha | Sn based alloy containing Sn-Ti compound, method for manufacturing same, and precursor of Nb3Sn superconducting wire |
| CN101892395A (en) * | 2010-06-12 | 2010-11-24 | 安泰科技股份有限公司 | Method for smelting magnesium by decomposition in vacuum through microwaves |
| CN101979687A (en) * | 2010-09-29 | 2011-02-23 | 山西太钢不锈钢股份有限公司 | Method for smelting nickel alloy in vacuum induction furnace |
| CN203163472U (en) * | 2013-04-07 | 2013-08-28 | 重庆润泽医药有限公司 | Microwave vacuum sintering furnace |
| CN104310405A (en) * | 2014-10-10 | 2015-01-28 | 东莞市长安东阳光铝业研发有限公司 | A microwave plasma-assisted purification method for polysilicon |
-
2016
- 2016-06-23 CN CN201610461588.XA patent/CN107541638A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020153119A1 (en) * | 2001-04-19 | 2002-10-24 | Mitsubishi Denki Kabushiki Kaisha | Sn based alloy containing Sn-Ti compound, method for manufacturing same, and precursor of Nb3Sn superconducting wire |
| CN101892395A (en) * | 2010-06-12 | 2010-11-24 | 安泰科技股份有限公司 | Method for smelting magnesium by decomposition in vacuum through microwaves |
| CN101979687A (en) * | 2010-09-29 | 2011-02-23 | 山西太钢不锈钢股份有限公司 | Method for smelting nickel alloy in vacuum induction furnace |
| CN203163472U (en) * | 2013-04-07 | 2013-08-28 | 重庆润泽医药有限公司 | Microwave vacuum sintering furnace |
| CN104310405A (en) * | 2014-10-10 | 2015-01-28 | 东莞市长安东阳光铝业研发有限公司 | A microwave plasma-assisted purification method for polysilicon |
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