CN104726640A - Composite vanadium-nitrogen additive for deformed steel bar production - Google Patents
Composite vanadium-nitrogen additive for deformed steel bar production Download PDFInfo
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- CN104726640A CN104726640A CN201510149668.7A CN201510149668A CN104726640A CN 104726640 A CN104726640 A CN 104726640A CN 201510149668 A CN201510149668 A CN 201510149668A CN 104726640 A CN104726640 A CN 104726640A
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Abstract
The invention discloses a composite vanadium-nitrogen additive for deformed steel bar production, and belongs to the technical field of metallurgy. The composite vanadium-nitrogen additive comprises the following components in percent by weight: not less than 13% of vanadium, not less than 20% of nitrogen, not less than 40% of silicon, not less than 25% of iron and the balance of impurities; and the impurities comprise the following elements in percent by weight: not more than 0.05% of phosphorus, not more than 0.04% of sulfur and not more than 1.5% of carbon. When the composite vanadium-nitrogen additive is applied to the deformed steel bar production, the alloy amount can be reduced; and significant economic benefits are brought.
Description
Technical field
The present invention relates to a kind of steel-making vanadium-nitrogen additive, particularly a kind of Deformed Steel Bars production compound vanadium nitrogen additive, belongs to metallurgical technology field.
Background technology
Deformed Steel Bars is the principal item that domestic steel enterprise produces, Deformed Steel Bars intensity conventional at present, the performance index such as composition have corresponding national standard, in Deformed Steel Bars production technique, need in molten steel, add a certain amount of silicomanganese, ferrosilicon, the product that VN alloy additive etc. is produced could meet various standard and service requirements, about silicomanganese, ferrosilicon, the effect of VN alloy additive and operation generally use in current Deformed Steel Bars is produced, do not repeat them here, when the profit that current steel are produced is more and more lower, the approach reduced costs all is being found by each producer, the proportion that the above material added in Deformed Steel Bars production process accounts for Deformed Steel Bars cost is larger, in Deformed Steel Bars is produced, how develop the important content that additive that the standard-required that can meet Deformed Steel Bars can reduce again its production cost is the technological development of each large steel enterprise.
Summary of the invention
When meeting Deformed Steel Bars requirement, the amount of combinationally using is large, cost is high to the object of the invention is to overcome in prior art the material such as silicomanganese, ferrosilicon, VN alloy additive in Deformed Steel Bars production process, provides a kind of Deformed Steel Bars production compound vanadium nitrogen additive.
For realizing object of the present invention, the technical solution adopted in the present invention is: a kind of Deformed Steel Bars production compound vanadium nitrogen additive, and in described compound vanadium nitrogen additive, each component content is: vanadium >=13%; Nitrogen >=20; Silicon >=40; Iron >=25%; Surplus is impurity, each foreign matter content in impurity: phosphorus≤0.05%; Sulphur≤0.04%; Carbon≤1.5%, further, described compound vanadium nitrogen additive adopts VN alloy and ferro-silicon nitride mixing to obtain, and described VN alloy is VN16; In described ferro-silicon nitride, each component content is: silicon 49-51%; Nitrogen: 30-32%; Iron: 13-15%; Surplus is impurity, each foreign matter content in impurity: aluminium≤1.5%; Calcium≤1%; Water≤0.1%, further, described compound vanadium nitrogen additive adopts VN alloy and ferro-silicon nitride mixing to obtain, described VN alloy and ferro-silicon nitride are all crushed to 1-5mm, further, described ferro-silicon nitride is adopted and is obtained with the following method: ferrosilicon FeSi75 is 100-200 object ferrosilicon powder by pulverizing mill abrasive dust, and ferrosilicon composition meets following requirement: silicon: 72%-80%; Aluminium≤1.0%; Calcium≤1.0%; Manganese≤0.5%; Chromium≤0.5%; Phosphorus≤0.04%; Sulphur≤0.02; Carbon≤0.2%, surplus is iron; Ferrosilicon powder is sent into vacuum oven, passes into nitrogen, nitrogenize at 1200-1400 DEG C of temperature, be cooled to 120 DEG C to obtain ferro-silicon nitride through refrigerating unit, in described ferro-silicon nitride, each constituent content is: silicon 49-51%; Nitrogen: 30-32%; Iron: 13-15%; Surplus is impurity, each foreign matter content in impurity: aluminium≤1.5%; Calcium≤1%; Water≤0.1%.
The positive Advantageous Effects that the present invention has is: the present invention adopts VN alloy to mix the additive formed with ferro-silicon nitride and achieves beyond thought effect, be specially: in Deformed Steel Bars smelting process, add be less than or equal to 0.5kg this additive in steel per ton through test, just can reduce by the silicomanganese consumption of about 19%, reduce the ferrosilicon consumption of about 10%, reduce the VN alloy consumption of about 13%, and the product various aspects of performance index produced meets existing national standard completely, be 13.73 yuan with the time in the end of the year 2014 for node calculate steel per ton reduces costs, in current Iron and Steel Production profit situation, the cost of 13.73 yuan reduces significantly, significant economic benefit can be brought for the production of Deformed Steel Bars, its silicomanganese reduced simultaneously, ferrosilicon consumption also can bring good environmental benefit, although VN alloy and ferro-silicon nitride all can separately as the additives in steel-making, but the new additive low dose formed after both employing certain proportion mixing of certain particle size is applied in before the consumption that significantly can reduce the materials such as silicomanganese in Deformed Steel Bars production is and did not expect, so the present invention achieves beyond thought technique effect, significant benefit is brought to the production of Deformed Steel Bars.
Embodiment
In order to explain enforcement of the present invention more fully, provide embodiment of the present invention, these embodiments are only to elaboration of the present invention, do not limit the scope of the invention.
A kind of Deformed Steel Bars is produced and is used compound vanadium nitrogen additive, and in described compound vanadium nitrogen additive, each component content is: vanadium >=13%; Nitrogen >=20; Silicon >=40; Iron >=25%; Surplus is impurity, each foreign matter content in impurity: phosphorus≤0.05%; Sulphur≤0.04%; Carbon≤1.5%, further, described compound vanadium nitrogen additive adopts VN alloy and ferro-silicon nitride mixing to obtain, and described VN alloy is VN16; In described ferro-silicon nitride, each component content is: silicon 49-51%; Nitrogen: 30-32%; Iron: 13-15%; Surplus is impurity, each foreign matter content in impurity: aluminium≤1.5%; Calcium≤1%; Water≤0.1%, further, described compound vanadium nitrogen additive adopts VN alloy and ferro-silicon nitride mixing to obtain, described VN alloy and ferro-silicon nitride are all crushed to 1-5mm, further, described ferro-silicon nitride is adopted and is obtained with the following method: ferrosilicon FeSi75 is 100-200 object ferrosilicon powder by pulverizing mill abrasive dust, and ferrosilicon FeSi75 composition meets following requirement: silicon: 72%-80%; Aluminium≤1.0%; Calcium≤1.0%; Manganese≤0.5%; Chromium≤0.5%; Phosphorus≤0.04%; Sulphur≤0.02; Carbon≤0.2%, surplus is iron; Ferrosilicon powder is sent into vacuum oven, passes into nitrogen, nitrogenize at 1200-1400 DEG C of temperature, be cooled to 120 DEG C to obtain ferro-silicon nitride through refrigerating unit, in described ferro-silicon nitride, each constituent content is: silicon 49-51%; Nitrogen: 30-32%; Iron: 13-15%; Surplus is impurity, each foreign matter content in impurity: aluminium≤1.5%; Calcium≤1%; Water≤0.1%.
The preparation method of China Patent No. ZL201010545694.9 is adopted to obtain VN alloy VN16, each substances content in VN alloy is: V:77-81% N:14-18% C≤6%, P≤0.06%, S≤0.10%, adopt ferro-silicon nitride prepared by the method announced in the present invention, ferro-silicon nitride also can adopt other method prepare or commercial, as long as the constituent content met, in ferro-silicon nitride, each constituent content is: silicon 49-51%; Nitrogen: 30-32%; Iron: 13-15%; Surplus is impurity, each foreign matter content in impurity: aluminium≤1.5%; Calcium≤1%; Water≤0.1%, the nitrogen in silicon nitride and silicon are with Si
3n
4form exists, and requires Si
3n
4content is 75-80%, first adopt jaw crusher pulverized particles to 1-5mm size VN alloy VN16 and ferro-silicon nitride, then with weight ratio VN alloy VN16: ferro-silicon nitride=obtained compound vanadium nitrogen additive of the present invention of 1:4-5 mixing, concrete blending ratio requires according to meeting last composition, compound vanadium nitrogen additive reality is also alloy, and in mixed additive, each element meets following requirement: vanadium>=13%; Nitrogen>=20; Silicon>=40; Iron>=25%; Surplus is impurity, each foreign matter content in impurity: phosphorus≤0.05%; Sulphur≤0.04%; Carbon≤1.5%.
The tracking results of certain steel mill actual use compound vanadium nitrogen additive:
First, do not use in this compound vanadium nitrogen additive technique at existing, alloy dosage is folded in steel per ton to be needed to add silicomanganese 21.5kg; Ferrosilicon 4.5kg; VN alloy 0.32kg.
Use this compound vanadium nitrogen additive produce Deformed Steel Bars use follow the tracks of details:
1, steelmaking process is followed the tracks of: use two stoves altogether, and wherein every stove produces steel 290 tons, and table 1 is the add-on in steelmaking process, compound vanadium nitrogen and compound vanadium nitrogen additive of the present invention
The loss per ton steel of steelmaking process alloy is as shown in table 2:
The Chemical Composition of heat controls as table 3:
2, rolling process is followed the tracks of
First short run rolling, rolling steel grade is HRB400E-3, and 10 material are rolled in examination, and produce Deformed Steel Bars 12, technology controlling and process is identical with normal HRB400-3 blank, and steel inspection mechanical property is up to standard, and the average 90ppm of steel gas N content, particular case is as shown in table 4, table 5.
When short run examination roll Deformed Steel Bars mechanical property all up to standard, start batch examination and roll, technology controlling and process is identical with normal HRB400-3 blank.Steel inspection mechanical property is up to standard, and particular case is as shown in table 6.
More than use experiment to prove, use this product steel-making product and steel rolling product to be up to state standards completely.
Use this product and do not use the more as shown in table 7 of this product, wherein not using the technique of this product to be current technology, compound vanadium nitrogen and compound vanadium nitrogen additive of the present invention.
Draw from above use: from the inspection situation of test products, Chemical Composition when using compound vanadium nitrogen of the present invention to produce Deformed Steel Bars is on meeting the requirements in situation, the minimum 433Mpa of steel mechanics performance yield strength, yield tensile ratio minimum 1.33, meet yield strength >=420Mpa, the requirement of yield tensile ratio >=1.25, and have certain surplus; Steel gas N content test mean value 90ppm, from alloy consumption, produce the few materials of ton steel silicomanganese depletion and be about 4kg/t, ferrosilicon consumption reduces about 0.4kg/t, and VN alloy consumption reduces about 0.04kg/t, compound vanadium nitrogen increase about 0.48kg/t.COMPREHENSIVE CALCULATING, cost of alloy reduces about 13.73 yuan/t.In sum, this uses compound vanadium nitrogen to produce blank about 290 tons, and Chemical Composition meets the requirements, and steel mechanics performance is all up to standard, and predesigne reduces cost of alloy about 13.73 yuan/t steel than current technology.Price more than in table calculates according to the price quotations in the end of the year 2014, and current compound vanadium nitrogen price has reduction again, and other price is constant, and cost reduction more at that time can be more.Existing steel-making in the present invention, steel rolling process are known.Content in the present invention is weight content.
After detailed description embodiments of the present invention, the personage being familiar with this technology can be well understood to, do not departing under above-mentioned claim and spirit and can carry out various change and amendment, all above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all belong to the scope of technical solution of the present invention, and the present invention is not also limited to the embodiment of example in specification sheets.
Claims (4)
1. Deformed Steel Bars is produced and is used a compound vanadium nitrogen additive, it is characterized in that: in described compound vanadium nitrogen additive, each Ingredient Wt content is: vanadium >=13%; Nitrogen >=20; Silicon >=40; Iron >=25%; Surplus is impurity, each foreign matter content in impurity: phosphorus≤0.05%; Sulphur≤0.04%; Carbon≤1.5%.
2. a kind of Deformed Steel Bars production compound vanadium nitrogen additive according to claim 1, is characterized in that: described compound vanadium nitrogen additive adopts VN alloy and ferro-silicon nitride mixing to obtain, and described VN alloy is VN16; In described ferro-silicon nitride, each Ingredient Wt content is: silicon 49-51%; Nitrogen: 30-32%; Iron: 13-15%; Surplus is impurity, each foreign matter content in impurity: aluminium≤1.5%; Calcium≤1%; Water≤0.1%.
3. a kind of Deformed Steel Bars production compound vanadium nitrogen additive according to claim 2, is characterized in that: described compound vanadium nitrogen additive adopts VN alloy and ferro-silicon nitride mixing to obtain, and described VN alloy and ferro-silicon nitride are all crushed to 1-5mm.
4. a kind of Deformed Steel Bars production compound vanadium nitrogen additive according to claim 2, it is characterized in that: described ferro-silicon nitride is adopted and obtained with the following method: ferrosilicon FeSi75 is 100-200 object ferrosilicon powder by pulverizing mill abrasive dust, ferrosilicon composition meets following requirement: silicon: 72%-80%; Aluminium≤1.0%; Calcium≤1.0%; Manganese≤0.5%; Chromium≤0.5%; Phosphorus≤0.04%; Sulphur content≤0.02; Carbon≤0.2%, surplus is iron; Ferrosilicon powder is sent into vacuum oven, passes into nitrogen, nitrogenize at 1200-1400 DEG C of temperature, be cooled to 120 DEG C to obtain ferro-silicon nitride through refrigerating unit, in described ferro-silicon nitride, each constituent content is: silicon 49-51%; Nitrogen: 30-32%; Iron: 13-15%; Surplus is impurity, each foreign matter content in impurity: aluminium≤1.5%; Calcium≤1%; Water≤0.1%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105132789A (en) * | 2015-09-01 | 2015-12-09 | 安阳荣达铸业有限公司 | Composite vanadium and nitrogen additive and preparing method thereof |
| CN105463230A (en) * | 2015-11-26 | 2016-04-06 | 北京科技大学 | Method for producing low-carbon low-melting-point silicon-nitrogen alloy |
| CN110964972A (en) * | 2019-12-30 | 2020-04-07 | 马鞍山中科冶金材料科技有限公司 | Rare earth silicon-nitrogen-vanadium alloy and preparation method and application thereof |
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| CN1982489A (en) * | 2006-02-11 | 2007-06-20 | 湖南华菱涟源钢铁有限公司 | Production method of III-grade threaded steel bar |
| CN101693977A (en) * | 2009-10-14 | 2010-04-14 | 马鞍山钢铁股份有限公司 | Vanadium-nitrogen additive for smelting microalloyed steel and method for preparing same |
| CN104046888A (en) * | 2013-12-06 | 2014-09-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Cored wire, its application, vanadium and nitrogen alloyed molten steel, preparation method of vanadium and nitrogen alloyed molten steel, and vanadium and nitrogen micro-alloyed steel |
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2015
- 2015-04-01 CN CN201510149668.7A patent/CN104726640A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1982489A (en) * | 2006-02-11 | 2007-06-20 | 湖南华菱涟源钢铁有限公司 | Production method of III-grade threaded steel bar |
| CN101693977A (en) * | 2009-10-14 | 2010-04-14 | 马鞍山钢铁股份有限公司 | Vanadium-nitrogen additive for smelting microalloyed steel and method for preparing same |
| CN104046888A (en) * | 2013-12-06 | 2014-09-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Cored wire, its application, vanadium and nitrogen alloyed molten steel, preparation method of vanadium and nitrogen alloyed molten steel, and vanadium and nitrogen micro-alloyed steel |
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| 韩俊华等: "硅铁粉粒度对合成氮化硅铁的影响", 《耐火材料》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105132789A (en) * | 2015-09-01 | 2015-12-09 | 安阳荣达铸业有限公司 | Composite vanadium and nitrogen additive and preparing method thereof |
| CN105463230A (en) * | 2015-11-26 | 2016-04-06 | 北京科技大学 | Method for producing low-carbon low-melting-point silicon-nitrogen alloy |
| CN110964972A (en) * | 2019-12-30 | 2020-04-07 | 马鞍山中科冶金材料科技有限公司 | Rare earth silicon-nitrogen-vanadium alloy and preparation method and application thereof |
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