CN105132789A - Composite vanadium and nitrogen additive and preparing method thereof - Google Patents
Composite vanadium and nitrogen additive and preparing method thereof Download PDFInfo
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- CN105132789A CN105132789A CN201510549755.1A CN201510549755A CN105132789A CN 105132789 A CN105132789 A CN 105132789A CN 201510549755 A CN201510549755 A CN 201510549755A CN 105132789 A CN105132789 A CN 105132789A
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Abstract
The invention relates to a composite vanadium and nitrogen additive and a preparing method thereof. The composite vanadium and nitrogen additive consists of ferro-silicon nitride, VN16 and aluminum particles. The preparing method comprises the following steps: respectively making the ferro-silicon nitride, the VN16 and the aluminum particles into particles 3-5mm in granularity, mixing 67-72 parts of ferro-silicon nitride, 18-20 parts of VN16 and 10-13 parts of aluminum particles based on a ratio by weight, filling into a fire-proof and damp-proof packaging bag, and sealing so as to obtain a finished product. The preparing method of the composite vanadium and nitrogen additive is simple to operate and low in manufacture cost, and does not need special equipment. Compared with a traditional technology, the preparing method has the advantages that vanadium and nitrogen recycling rates can be greatly improved, and the grain of the obtained steel material is finer and higher than 8.5 grade.
Description
Technical field
The present invention relates to a kind of metallurgical addition agent, particularly a kind of compound vanadium nitrogen additive and preparation method thereof.
Background technology
The micro alloying element producing HRB400 steel conventional comprises V, Nb, Ti etc.During with V microalloying, adopt pair rolling technique just can obtain the qualified stable HRB400 steel of performance.V is easier to be solidly soluted in steel, is easier to again separate out micro alloying element from steel.When not adding nitride, the main C element in steel of V is combined and forms VC, is present on matrix and crystal boundary, plays the effect of precipitation strength and inhibiting grain growth with the form of carbide.Can because of deformation-induced precipitation in the operation of rolling, generate vanadium compound particle, stop Austenite Grain Growth on the one hand, can stop again or postpone austenite recrystallization on the other hand, refinement austenite, thus refinement ferrite crystal grain.
Time in steel containing more N, V is melted in after in steel, and the avidity due to V and N is greater than the avidity of V and C, and the N therefore more easily in steel is combined and forms VN, namely first generates VN, then generates VC.And the concentration of N in steel is higher, the V (C, N) separated out during rolling is more.Do not add in the low nitrogen vanadium steel of nitride or addition deficiency, the vanadium of 56% is solid-solution in ferrite matrix, only has the vanadium of 35.5% to form V (C, N), micro alloying elements a large amount of in steel does not play the effect of precipitation strength and inhibiting grain growth, and in steel, the waste of V is larger.The high nitrogen vanadium steel adding the compounds such as ferro-silicon nitride is then contrary, and the vanadium of more than 70% is separated out and formed V (C, N), only has the vanadium of 20% to be admittedly fused in matrix.Thus enhance the precipitation strength of vanadium and the effect of crystal grain thinning.In steel, nitrogen pick-up also reduces V (C, N) particle size, adds the quantity of V (C, N) precipitated phase, thus the intensity containing V reinforcing bar is obviously raised.
VN alloy is in the market based on VN16, and in existing process for making, the add-on of VN alloy is about 0.32kg/t, amounts to ton steel cost 36.16 yuan.When current steel production industry profit is more and more lower, the approach reduced costs all is being found by each producer, and how to reduce production cost further in the situation meeting steel strength requirement is each steel production enterprise problem demanding prompt solution.
Summary of the invention
The object of the invention is to improve steel product quality further and reduce production cost, a kind of compound vanadium nitrogen additive and preparation method thereof is provided.
In order to achieve the above object, the present invention has following technical scheme:
A kind of compound vanadium nitrogen additive of the present invention, described compound vanadium nitrogen additive is made up of ferro-silicon nitride, VN16, aluminum shot, and each ingredients weight parts proportioning is ferro-silicon nitride 67-72 part, VN1618-20 part, aluminum shot 10-13 part.
In described compound vanadium nitrogen additive, content of vanadium is 13.9-16.2wt%, and nitrogen content is 22.2-26.6wt%, and silicone content is 31.5-36.7wt%, and aluminium content is 9.8-12.9wt%, and iron level is 8.7-10.8wt%, and surplus is carbon and inevitable impurity.
A preparation method for compound vanadium nitrogen additive, the concrete steps of described method are as follows:
(1) ferro-silicon nitride, VN16, aluminum shot are carried out fragmentation, screening respectively, obtain the particle of 3 ~ 5mm granularity, and carry out the process of rolling ball making process to screen underflow, the particle making 3 ~ 5mm granularity reclaims;
(2) by the particle that obtains in step (1) be the ratio mixing of ferro-silicon nitride 67-72 part, VN1618-20 part, aluminum shot 10-13 part by weight ratio;
(3) product that step (2) obtains is loaded sealing in fire-resistant moisture-proof packing bag to get product.
In described ferro-silicon nitride, silicone content is 47-51wt%, and nitrogen content is 30-32wt%, and iron level is 13-15wt%.
In described VN16, nitrogen content is 12-18wt%, and content of vanadium is 77-81wt%.
In described aluminum shot, aluminium content is 98-99wt%.
Owing to taking above technical scheme, the invention has the advantages that:
(1), during steel-making, compound vanadium nitrogen additive finished product of the present invention is dropped into ladle, because granularity of the present invention is 3-5 millimeter, namely melt rapidly once contact molten steel and absorbed, avoiding being exposed in air oxidized, simple to operate, low cost of manufacture, and do not need specific installation;
(2) compound vanadium nitrogen additive of the present invention is applicable to common hot pressing Deformed Steel Bars, the consumption containing alloy addition can be reduced, every ton steel cost can decline 13-15 yuan/ton and (use in Chinese building material Iron And Steel Company batch, compared with traditional technology, VN alloy 0.14kg/t can be saved, save ferrosilicon 4.0kg/t, save silicomanganese 1.2kg/t);
(3) terminal tapping temperature reduces with the minimizing of alloy addition, and use compound vanadium nitrogen additive of the present invention can reduce terminal tapping temperature about 10 DEG C, terminal tapping temperature often declines 1 DEG C, every ton steel cost decline 0.8-1 yuan/ton;
(4) the metal A l in compound vanadium nitrogen additive of the present invention is heated, and is first removed with the oxygen reaction in residual air in additive: 4Al+3O
2=2Al
2o
3, N remaining in air
2gas expanded by heating, the high pressure N produced
2the decomposition of VN under high temperature can be suppressed again; Oxide compound VO or V of vanadium simultaneously
2o
3, under the environment of molten steel heating, following reaction will be there is with the aluminium powder in compound vanadium nitrogen additive respectively: 3VO+2Al=Al
2o
3+ 3V, V
2o
3+ 2Al=Al
2o
3+ 2V, therefore, uses compound vanadium nitrogen additive of the present invention can increase substantially vanadium, nitrogen recovery during steel-making;
(5) strengthening mechanism of nitro-alloy is that the dispersoid particle of separating out nitride in steel hot rolling process is to the pinning effect grain refining intensificatiom of austenite crystal, and the dispersoid particle strengthening of second-phase, be the solution strengthening of the elements such as a kind of alternative traditional silicon, manganese.Therefore use the Deformed Steel Bars that compound vanadium nitrogen additive of the present invention is produced, compared with employing traditional technology, steel crystal grain is thinner, reaches more than 8.5 grades, is more conducive to the welding property improving steel.
Embodiment
Following examples for illustration of the present invention and uses thereof, but are not used for limiting the scope of the invention.
Embodiment one
Ferro-silicon nitride, VN16, aluminum shot are carried out fragmentation, screening respectively, obtains the particle of 3 ~ 5mm granularity, and carry out the process of rolling ball making process to screen underflow, the particle making 3 ~ 5mm granularity reclaims; By the particle that obtains by weight ratio for after the ratio mixing of ferro-silicon nitride 67 parts, VN1620 part, aluminum shot 13 parts, get product for sealing in standard loads fire-resistant moisture-proof packing bag with 10kg/ bag.
Embodiment two
Ferro-silicon nitride, VN16, aluminum shot are carried out fragmentation, screening respectively, obtains the particle of 3 ~ 5mm granularity, and carry out the process of rolling ball making process to screen underflow, the particle making 3 ~ 5mm granularity reclaims; By the particle that obtains by weight ratio for after the ratio mixing of ferro-silicon nitride 72 parts, VN1618 part, aluminum shot 10 parts, get product for sealing in standard loads fire-resistant moisture-proof packing bag with 10kg/ bag.
Test example
Embodiment one gained finished product is used for HRB400 to produce, and tests content and the yield strength of nitrogen in Different adding amount gained steel, test result is as shown in table 1:
Table 1
| Addition (kg/t) | Steel nitrogen content (PPm) | Steel yield strength (MPa) |
| 0.1 | 69 | 400 |
| 0.2 | 78 | 410 |
| 0.3 | 86 | 420 |
| 0.4 | 95 | 440 |
| 0.5 | 104 | 450 |
| 0.6 | 113 | 460 |
| 0.7 | 122 | 470 |
As can be seen from Table 1, when compound vanadium nitrogen additive addition is more than 0.1kg/t, gained steel yield strength reaches 400MPa, meets the requirement of HRB400 to yield strength; Along with the increase of compound vanadium nitrogen additive add-on, the nitrogen content of gained steel increases, yield strength increases, GB GB1499.2-07 standard specifies that the nitrogen content in Deformed Steel Bars is not more than 120PPm, when compound vanadium nitrogen additive ton steel addition is 0.5kg/t, Control of Nitrogen Content in Deformed Steel Bars, at about 105PPm, both met Standard, and the advantage of this product can be made again to maximize.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here cannot give exhaustive to all embodiments.Every belong to technical scheme of the present invention the apparent change of extending out or variation be still in the row of protection scope of the present invention.
Claims (6)
1. a compound vanadium nitrogen additive, is characterized in that: described compound vanadium nitrogen additive is made up of ferro-silicon nitride, VN16, aluminum shot, and each ingredients weight parts proportioning is ferro-silicon nitride 67-72 part, VN1618-20 part, aluminum shot 10-13 part.
2. a kind of compound vanadium nitrogen additive according to claim 1, it is characterized in that: in described compound vanadium nitrogen additive, content of vanadium is 13.9-16.2wt%, nitrogen content is 22.2-26.6wt%, silicone content is 31.5-36.7wt%, aluminium content is 9.8-12.9wt%, iron level is 8.7-10.8wt%, and surplus is carbon and inevitable impurity.
3. a preparation method for compound vanadium nitrogen additive, is characterized in that, the concrete steps of described method are as follows:
(1) ferro-silicon nitride, VN16, aluminum shot are carried out fragmentation, screening respectively, obtain the particle of 3 ~ 5mm granularity, and carry out the process of rolling ball making process to screen underflow, the particle making 3 ~ 5mm granularity reclaims;
(2) by the particle that obtains in step (1) be the ratio mixing of ferro-silicon nitride 67-72 part, VN1618-20 part, aluminum shot 10-13 part by weight ratio;
(3) product that step (2) obtains is loaded sealing in fire-resistant moisture-proof packing bag to get product.
4. the preparation method of a kind of compound vanadium nitrogen additive according to claim 3, it is characterized in that: in described ferro-silicon nitride, silicone content is 47-51wt%, nitrogen content is 30-32wt%, and iron level is 13-15wt%.
5. the preparation method of a kind of compound vanadium nitrogen additive according to claim 3, it is characterized in that: in described VN16, nitrogen content is 12-18wt%, content of vanadium is 77-81wt%.
6. the preparation method of a kind of compound vanadium nitrogen additive according to claim 3, is characterized in that: in described aluminum shot, aluminium content is 98-99wt%.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828000A (en) * | 2012-10-08 | 2012-12-19 | 侯巍 | Metallurgical V-N microalloying and compound deoxidation cored wire |
| CN104046725A (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 |
| CN104060031A (en) * | 2013-12-06 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Core spun yarn and application thereof, vanadium nitrogen alloyed molten steel and preparation method thereof, and vanadium nitrogen microalloyed steel |
| CN104726640A (en) * | 2015-04-01 | 2015-06-24 | 河南昱千鑫金属科技有限公司 | Composite vanadium-nitrogen additive for deformed steel bar production |
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- 2015-09-01 CN CN201510549755.1A patent/CN105132789A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828000A (en) * | 2012-10-08 | 2012-12-19 | 侯巍 | Metallurgical V-N microalloying and compound deoxidation cored wire |
| CN104046725A (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 |
| CN104060031A (en) * | 2013-12-06 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Core spun yarn and application thereof, vanadium nitrogen alloyed molten steel and preparation method thereof, and vanadium nitrogen microalloyed steel |
| CN104726640A (en) * | 2015-04-01 | 2015-06-24 | 河南昱千鑫金属科技有限公司 | Composite vanadium-nitrogen additive for deformed steel bar production |
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Application publication date: 20151209 |