CN103451362B - Method for carrying out boron microalloying on steel by using boric acid instead of ferroboron - Google Patents
Method for carrying out boron microalloying on steel by using boric acid instead of ferroboron Download PDFInfo
- Publication number
- CN103451362B CN103451362B CN201310373636.6A CN201310373636A CN103451362B CN 103451362 B CN103451362 B CN 103451362B CN 201310373636 A CN201310373636 A CN 201310373636A CN 103451362 B CN103451362 B CN 103451362B
- Authority
- CN
- China
- Prior art keywords
- boron
- steel
- boric acid
- powder
- agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to boron microalloying of steel and in particular relates to a method for carrying out boron microalloying on steel by using boric acid instead of ferroboron. The method comprises the following steps: heating industrial pure boric acid to carry out dehydration and melting treatment so that the industrial pure boric acid becomes transparent glass; after cooling the glass to the room temperature, breaking and grinding the glass into fine powder and mixing the fine powder with rare earth ferrosilicon powder uniformly to prepare a boron increasing agent; using an aluminium foil to wrap boron increasing agent powder and putting the boron increasing agent powder at the bottom of a steel ladle according to 0.1-0.15wt% of the weight of molten steel; after the temperature and components of the molten steel meet the requirements, inserting aluminium for deoxidation, adding ferrotitanium to measure nitrogen, carrying out tapping, subjecting raw materials of the boron increasing agent to chemical reaction under the action of high-temperature molten steel to generate elementary boron atoms, and enabling the elementary boron atoms to enter the molten steel, thus completing boron microalloying of steel. Practice results show that the boric acid has stable boron increasing agent effects and can absolutely replace ferroboron to carry out boron microalloying on boron-containing steel.
Description
Technical field
The present invention relates to the boron micro-alloyed of steel, refer in particular to a kind of boric acid and replace ferro-boron to carry out the boron micro-alloyed method of steel.
Background technology
Boron is the effective and the most most economical alloying element of the adaptive of quenching that can improve steel that finds at present, research shows: in steel, add 0.002-0.003%B can improve the quench effect of adaptive of soft steel and be equivalent to add 0.5%Mn, 0.5%Mo and 0.5%Wo, if these alloying elements and boron are added simultaneously, then effect can be more remarkable; After adding boron in steel under the prerequisite not affecting plasticity and toughness, the intensity of steel can be increased substantially.So boron steel is widely used in the preparation of tractor, lathe and various mechanical part; Application boron steel can save the metals resources such as chromium, nickel, molybdenum that China lacks; In addition, because boron has the ability of capturing neutron, in nuclear industry, boron steel have also been obtained widespread use.
The method of tradition boron-containing steel boron micro-alloyed employing in molten bath, adds ferro-boron Fe-B alloy at steel-deoxidizing with after determining nitrogen; In addition, some enterprises with good conditionsi of China also adopt pig iron containing boron or molten iron smelting boron-containing steel.
Boric acid H
3bO
3can occur at a certain temperature to decompose and generate boric anhydride B
2o
3, that is: 2H
3bO
3→ B
2o
3+ 3H
2o; At high temperature, as rare earth RE and aluminium Al, have the element of stronger avidity if existed with oxygen, boron atom will be reduced out, that is: 2RE+ B
2o
3→ 2 [B]+RE
2o
3, 2Al+ B
2o
3→ 2 [B]+Al
2o
3, activated boron atoms is dissolved in steel just can realize the alloying of boron.So, use boric acid can be used for carrying out steel the microalloying of boron equally.
Compared with ferro-boron, boric acid is a cheap boron supplying agent.So the use of boric acid increasing boron agent can reduce the production cost of boron-containing steel.
Summary of the invention
A kind of boric acid is the object of the present invention is to provide to replace ferro-boron steel to be carried out to the method for the microalloying of boron.Its processing step is as follows:
(1) boron supplying agent is the commercially available boric acid (H of technical pure
3bO
3>=98%wt), reductive agent is rare earth ferrosilicon (RE>=20%wt, Si>=40%wt);
(2) boric acid powder is heated to 500oC-600oC dehydration and vitrifying, after being cooled to room temperature, with the broken particle becoming granularity and be less than 10mm of jaw crusher; Then, the fine powder of more than granularity 50 order is become in grinding in ball grinder; The rare earth ferrosilicon of large bulk also adopts identical method to grind to form the fine powder of more than granularity 50 order;
(3) boron supplying agent powder and reductive agent rare earth silicon iron powder are prepared burden according to 1:2 weight ratio, powder after weighing is put into ball mill mixing, is ground to evenly, pour out the powder after mixing and namely make the agent of increasing boron, increasing boron agent needs to be positioned over dry containers for future use before the use;
(4) smelting molten steel in steel melting furnace, inserts aluminium deoxidation and adds 0.1%wt 30Fe-Ti and determine nitrogen after the composition of steel and temperature reach requirement;
(5) boron agent is increased with aluminium foil or empty pop can bucket parcel, the add-on increasing boron agent is the 0.1-0.15wt% of Metal Weight, dry degassing processing 50-80 minute is carried out at 150oC-200oC before adding, then, increasing boron agent parcel is placed on ladle bottom, goes out the microalloying process namely completing boron after steel drift melts.
Accompanying drawing explanation
Fig. 1 is schema of the present invention.
Embodiment
Embodiment 1
By commercially available technical pure boric acid (H
3bO
3>=98%wt) be heated to 500oC and make it to dewater and become transparent vitreum, after being cooled to room temperature, with jaw crusher by vitreum and rare earth ferrosilicon (RE, 23.5%wt, Si, 46%wt) fragmentation becomes the small-particle that granularity is less than 10mm, small-particle raw mill is become the fine powder of more than granularity 50 order in ball mill, and boric acid boron supplying agent powder and rare earth silicon iron powder reductive agent are according to 1:2 weight proportion, weighing; Raw material after weighing up is put into grinding in ball grinder and mixes 60 minutes, pour out the powder after mixing and namely make and increase boron agent, increasing boron agent needs to be positioned over dry containers for future use before the use.
With aluminium foil or empty pop can bucket parcel mixed powder, the add-on increasing boron agent is 0.15% of Metal Weight.Carry out dry degassing processing 80 minutes at 150oC before adding, then, place it in ladle bottom.
Melting 20Mn molten steel in medium-frequency induction furnace or electric arc furnace; Insert aluminium deoxidation and add 0.1%wt 30Fe-Ti after the composition of steel and temperature reach requirement and determine nitrogen, go out the microalloying process that namely agent of steel reinforced concrete punching increasing boron completes boron, after testing, the boron-containing quantity of 20MnB steel is 39ppm.
Embodiment 2
By commercially available technical pure boric acid (H
3bO
3>=98%wt) be heated to 600oC and make it to dewater and become transparent vitreum, after being cooled to room temperature, with jaw crusher by vitreum and rare earth ferrosilicon (RE, 23.5%wt, Si, 46%wt) fragmentation becomes the small-particle that granularity is less than 10mm, small-particle raw mill is become the fine powder of more than granularity 50 order in ball mill, boric acid boron supplying agent powder and rare earth silicon iron powder reductive agent are according to 1:2 weight proportion, weighing, raw material after weighing up is put into grinding in ball grinder and mixes 60 minutes, pour out the powder after mixing and namely make and increase boron agent.Increase boron agent to need before the use to be positioned over dry containers for future use.
With aluminium foil or empty pop can bucket parcel mixed powder, the add-on increasing boron agent is 0.1% of Metal Weight.Carry out dry degassing processing 50 minutes at 200oC before adding, then, place it in ladle bottom.
Melting 20Mn molten steel in converter, inserts aluminium deoxidation and adds 0.1%wt 30Fe-Ti and determine nitrogen after the composition of steel and temperature reach requirement, and go out the microalloying process that namely agent of steel reinforced concrete punching increasing boron completes boron, after testing, the boron-containing quantity of 20MnB steel is 35ppm.
Claims (4)
1. replace ferro-boron to carry out a boron micro-alloyed method for steel with boric acid, it is characterized in that comprising the steps:
(1) boric acid powder is heated to 500oC-600oC dehydration and vitrifying, after being cooled to room temperature, with the broken particle becoming granularity and be less than 10mm of jaw crusher; Then, the fine powder of more than granularity 50 order is become in grinding in ball grinder; The rare earth ferrosilicon of large bulk also adopts identical method to grind to form the fine powder of more than granularity 50 order;
(2) boron supplying agent powder and reductive agent rare earth silicon iron powder are prepared burden according to 1:2 weight ratio, powder after weighing is put into ball mill mixing, is ground to evenly, pour out the powder after mixing and namely make the agent of increasing boron, increasing boron agent needs to be positioned over dry containers for future use before the use;
(4) smelting molten steel in steel melting furnace, inserts aluminium deoxidation and determines nitrogen after the composition of steel and temperature reach requirement;
(5) increase boron agent with aluminium foil or empty pop can bucket parcel, the add-on increasing boron agent is the 0.1-0.15wt% of Metal Weight, adds front dry degassing processing; Then, increasing boron agent parcel is placed on ladle bottom, goes out the microalloying process namely completing boron after steel drift melts.
2. a kind of boric acid replaces ferro-boron to carry out the boron micro-alloyed method of steel as claimed in claim 1, it is characterized in that: described boric acid powder is the commercially available boric acid of technical pure, H
3bO
3>=98%wt; Described rare earth ferrosilicon, RE>=20%wt, Si>=40%wt.
3. a kind of boric acid replaces ferro-boron to carry out the boron micro-alloyed method of steel as claimed in claim 1, it is characterized in that: described nitrogen of determining adds 0.1%wt 30Fe-Ti to carry out determining nitrogen.
4. a kind of boric acid replaces ferro-boron to carry out the boron micro-alloyed method of steel as claimed in claim 1, it is characterized in that: described dry degassing processing refers to: carry out dry degassing processing 50-80 minute at 150oC-200oC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373636.6A CN103451362B (en) | 2013-08-26 | 2013-08-26 | Method for carrying out boron microalloying on steel by using boric acid instead of ferroboron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373636.6A CN103451362B (en) | 2013-08-26 | 2013-08-26 | Method for carrying out boron microalloying on steel by using boric acid instead of ferroboron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103451362A CN103451362A (en) | 2013-12-18 |
| CN103451362B true CN103451362B (en) | 2015-07-08 |
Family
ID=49734195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310373636.6A Expired - Fee Related CN103451362B (en) | 2013-08-26 | 2013-08-26 | Method for carrying out boron microalloying on steel by using boric acid instead of ferroboron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103451362B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102477473B (en) * | 2010-11-20 | 2013-06-12 | 山西太钢不锈钢股份有限公司 | Method for controlling boron content of boron-containing steel smelted by vacuum induction furnace |
| CN102719607B (en) * | 2011-03-29 | 2014-05-07 | 鞍钢股份有限公司 | Boron alloying method for ladle refining |
| CN102994943B (en) * | 2012-12-12 | 2015-01-07 | 张云江 | Rapid granular boriding medium |
-
2013
- 2013-08-26 CN CN201310373636.6A patent/CN103451362B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103451362A (en) | 2013-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101892352B (en) | Arc furnace deep dephosphorization technology and deep dephosphorization agent thereof | |
| RU2010128551A (en) | METHOD FOR PRODUCING MELT OF STEEL WITH MANGANese CONTENT UP TO 30% | |
| CN105734201B (en) | A kind of alfer, preparation method and the usage | |
| CN101135021B (en) | Aluminium magnesium ferroalloy for molten steel deoxidization desulfuration and alloying and preparation method thereof | |
| CN105112594A (en) | Method of using tilting furnace to smelt ferrovanadium | |
| US20200024145A1 (en) | Method for resource recovery from silicon slag and deoxidizing agent for iron and steelmaking | |
| CN102703686A (en) | Production process of inorganically combined fluorite balls | |
| CN103436656B (en) | A kind of borax replaces ferro-boron to carry out the boron micro-alloyed method of steel | |
| CN102560131B (en) | Premelted refining slag and preparation method thereof | |
| CN103146984B (en) | High-intensity gray pig iron inoculator and preparation method thereof | |
| CN103451362B (en) | Method for carrying out boron microalloying on steel by using boric acid instead of ferroboron | |
| CN106630644B (en) | A kind of rare earth cinder microcrystalline glass and preparation method thereof | |
| CN105568124A (en) | QT500-7 nodular cast iron material added with tin, and processing method thereof, and cast | |
| CN104212939A (en) | High-efficiency low-consumption production method for re-melting treatment of iron alloy particles | |
| CN105274281A (en) | Method used for controlling boron content in steel accurately | |
| CN104178688A (en) | Boron-containing wear-resistant alloy with impact resistance and preparation method thereof | |
| CN103722159A (en) | Method for casting rear axle support of heavy truck | |
| Kongkarat et al. | Formation of Ferrosilicon Alloy at 1550 C via Carbothermic Reduction of SiO2 by Coal and Graphite: Implication for Rice Husk Ash Utilization | |
| CN105316562A (en) | Method for preparing steel additives through waste rare earth materials | |
| CN103276273B (en) | The production method of high Rare Earth Lanthanum Silcaz | |
| CN106853533B (en) | A method of preparing high-purity ferro-boron superfine powder | |
| CN114032349B (en) | Alterant for high-chromium cast iron and preparation method thereof | |
| CN102634625A (en) | Method for producing ductile cast iron by utilizing desulfurized slags | |
| JPH02239138A (en) | Method for reforming steel making slag | |
| Zhuchkov et al. | Influence of the temperature, the interaction time, and the type of ore on the transition of boron to an alloy during reduction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20160826 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |