CN1213704A - Method of preparing high titanium ferroally powder - Google Patents
Method of preparing high titanium ferroally powder Download PDFInfo
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- CN1213704A CN1213704A CN 98111473 CN98111473A CN1213704A CN 1213704 A CN1213704 A CN 1213704A CN 98111473 CN98111473 CN 98111473 CN 98111473 A CN98111473 A CN 98111473A CN 1213704 A CN1213704 A CN 1213704A
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Abstract
A high-Ti iron alloy powder for coating core wire is made up through casting, cooling to 900-950 deg.C, demoulding (or heating high-Ti iron block to 900-950 deg.C), suddenly cooling in water under 80 deg.C, taking it from water at 200-300 deg.C, and coarse, middle and fine crushing to obtain powder with granularity less than 1.8 mm.
Description
The present invention relates to the alloy production technology, be specifically related to a kind of titaniferous amount that is used for alloy claded wire and be 60% to 75% method of preparing high titanium ferroally powder.
High ferrotianium involved in the present invention is meant that the titaniferous amount is 60% to 75% ferro-titanium.High ferrotianium particularly titaniferous amount is 70% 70 ferrotianiums, and because of its titaniferous amount height, the impurity element relative content is low, and fusing point low (about 1100 ℃) is the high-quality furnace charge that steel is smelted senior Ti-containing steel therefore.But high ferrotianium also has the shortcoming in the use: less (the about 4.5g/cm of density
3About), easily float over molten steel surface behind the adding molten steel, because the affinity ability of titanium and oxygen is stronger, very easily close and scaling loss with airborne oxidation, thereby the recovery rate of bringing titanium elements is low and add deficiencies such as hit rate instability, has increased steel-making cost, has influenced the stability of steel product quality.
Along with the development of cored-wire and ladle feeding line technology, the alloying element of the easy oxidation of various light weights all can be made into cored-wire and forces to feed molten steel, thereby has overcome some briquette ferroalloy floats over the molten steel surface oxidization burning loss owing to density is less problem preferably.As silicocalcium cored-wire, powdered carbon cored-wire etc.Equally high ferrotianium is made cored-wire feeding molten steel, can be overcome the problems referred to above of block high ferrotianium.
According to prior art, high ferrotianium is to adopt scrap iron scrap stock or titanium sponge to add iron remelting in induction furnace after art breading such as go-on-go, oil removing, baking to form.As application number is that 95113728.X and application number are as described in 96117080.8.These two kinds of methods all belong to the remelting ingot casting method, and difference is that the former ingot casting in vacuum chamber cools off, and the latter cools off with the surface protectant ingot casting in air.The common ground of these two kinds of methods all is that speed of cooling is slow excessively, and the high ferrotianium block toughness that obtains is better, is unfavorable for broken powder process.
Purpose of the present invention just is at the high ferrotianium block toughness of prior art preparation better, the problem that is unfavorable for broken powder process makes improvements, adopt the method for high ferrotianium ingot casting Quench or finished product ferrotianium heating back Quench, thereby obtain more crisp high ferrotitanium alloy, broken then powder process provides a kind of preparation method that can access the high titanium ferroally powder that is fit to the making cored-wire therefrom.
One of technical scheme that realizes the object of the invention is: its adopts Chinese patent application number is 96117080.8 disclosed methods, with titanium material waste material is raw material, in the open type electrical heater, remelting under the slag charge protection, and carry out according to following steps successively: steel scrap is dropped into the process furnace fusing; Aluminum deoxidation; Slagging-off; Throw in liquid level protection slag charge; Drop into titanium material waste material; Stir; The stokehold chemical examination; Liquid level band slag ingot casting; Demoulding cooling; Broken.And its improvement is: the ingot casting thickness of said liquid level band slag ingot casting is not more than 150mm, and the demoulding when treating that ingot bar is condensed to surface temperature and is 900 ℃ to 950 ℃; Said demoulding cooling is that the water that the ingot bar after the demoulding places temperature to be not more than 80 ℃ is cooled off, and when treating that ingot bar is cooled to 200 ℃～300 ℃, goes out water-air cooling; And said fragmentation is to be cooled to the ingot bar fragmentation of room temperature and powdering.
Under same design of the present invention, two of the technical scheme of realization the object of the invention is: with the high ferrotianium of finished product, in the open type electrical heater, add the covering slag remelting, after producing high ferrotianium solution, carry out according to one of aforementioned techniques scheme same steps as: liquid level band slag ingot casting, its ingot casting thickness is not more than 150mm, the demoulding when treating that ingot bar is condensed to its surface temperature and is 900 ℃ to 950 ℃; Ingot bar after the demoulding is inserted temperature be not more than in 80 ℃ the water and cool off, when treating that ingot bar is cooled to 200 ℃～300 ℃, go out water-air cooling: will be cooled to the ingot bar fragmentation of room temperature and powdering.
Under same design of the present invention, realize the object of the invention technical scheme three be: adopt the high ferrotianium of finished product when process furnace internal heating to 900 ℃～950 ℃, the water that places temperature to be not more than 80 ℃ of coming out of the stove cools off, to be cooled during to 200 ℃～300 ℃, go out water-air cooling, to be cooled to room temperature, carry out fragmentation and powdering.
The fragmentation of the high ferrotitanium alloy in preferred above-mentioned three technical schemes of the present invention, divided for three steps carried out at least: i.e. coarse crushing, its particle diameter is less than 150mm; In broken, its particle diameter is less than 20mm; In small, broken bits, its particle diameter is less than 1.8mm.
The present invention is by the improvement of method that Chinese number of patent application 96117080.8 is provided, or with after high ferrotianium remelting of finished product or the heating, adopt the method for Quench, and obtain more crisp high ferrotitanium alloy, and through broken and make powder, thereby solved the difficult problem of high ferrotianium powder process, satisfied the demand of high ferrotianium cored-wire the core powder.
A kind of preferred embodiment of the present invention is as follows, and adopting China Patent No. is 96117080.8 disclosed methods, that is:
(1) equipment: adopt 250KW intermediate frequency coreless induction furnace.
(2) raw material: titanium material waste material adopts its chemical ingredients to meet the standard of the TA1-TA5 among the GB3620-83.Lumpiness is as the criterion can go into stove.Steel scrap adopts high-quality soft steel, and its thickness is 0.8-1.5mm, for the raw material of band oil or corrosion (mainly being steel scrap), carries out oil removing, rust cleaning pre-treatment earlier, and dry for standby.Aluminium adopts content at the low sial more than 98%.
(3) liquid level protection slag charge: adopt technical grade, with NaF
260%, CaF
210%, the weight percentage proportioning of BaCl30%, even through mechanically mixing, barrelling is airtight standby.
(4) melting: carry out according to following steps successively:
Steel scrap is gone into stove, energising heat fused, 1630 ± 30 ℃ of liquid steel temperatures.
Add the aluminium block deoxidation.
Drag for surperficial slag.
Add a small amount of liquid level covering slag to fusing.
Add titanium material waste material, add successively again after waiting material melting, and keep furnace charge at the continuous melting state.And constantly add liquid level protection slag charge, make liquid level that the sealing of one deck slag be arranged.
Stir.After whole titanium material waste material to be added and furnace charge all melt, the even composition of hand mixing.
The stokehold chemical examination.The power insulation falls in sampling real-time analysis titanium content, quantizes to test the result according to titaniferous and adjusts composition.
Casting.Melting finish come out of the stove after, alloy liquid is watered into the ingot bar that thickness is not more than 150mm;
Demoulding cooling.The demoulding when treating that ingot bar is condensed to surface temperature and is 900 ℃～950 ℃;
Quench.Ingot bar is inserted in the water coolant, and the controlled chilling water temperature is not more than 80 ℃; When treating that the alloy ingot bar is cooled to 200 ℃～300 ℃, go out water-air cooling.
Broken.To be cooled to the ingot bar of room temperature, remove its oxide on surface, and coarse crushing becomes the bulk less than 150mm.To pass through through the block of coarse crushing to be crushed to less than 20mm in the alligator, in small, broken bits by twin rollers again to sieving by 10 orders (1.8mm).This flow process is common flour mill flow, needs to install the ventilation and dust removal device additional in this flow process in the broken screening in each road link, regulates air quantity and makes the suction opening dust concentration be not more than 0.5g/m
3
Ingot casting of the present invention, equipment and actually operating main points that Quench and broken step adopted are as follows: casting die is a disc, back cut diameter 800mm, and lower port diameter 400mm, high 600mm, wall thickness 70mm, material are cast iron, two slit bamboo or chopped woods attach together uses the M16 bolted.Smear thick protective layer with 20 orders (0.9mm)～50 orders (0.355mm) refractory mortar in the mold, in case superalloy liquid mold damage into about 5mm.
Cooling water tank is made of the 3mm steel plate, physical dimension 1200mm * 1200mm * 1000mm, and there is a water-in at the 100mm place in dried up case bottom, with the ball valve control of caliber 25mm.At dried up case 100mm suitable for reading place one spillway is arranged.
When alloy liquid injects mould, about about 5min of air cooling (winter) or 30min (summer) after, unclamp bolt, take out the alloy ingot bar, with driving a vehicle the alloy ingot bar is hung in cooling water tank.Open water intaking valve, inject water coolant.Begin to have a large amount of steam to emerge, treat that water tank water is full after, test water temperature with thermometer, and regulate the flooding quantity of water intaking valve, control water temperature is not more than 80 ℃.Range estimation ingot bar surface temperature, (the ingot bar surface temperature is about 200 ℃～300 ℃) hangs out the alloy ingot bar, air cooling when a small amount of bubble is emerged on the ingot bar surface.Utilize the ingot bar self heat to dry remaining moisture content voluntarily.
The alloy ingot bar that air cooling is good winches to Runout area, by the artificial adze-eye hammer of using; Remove slag, descaling, become the bulk of particle diameter with the sledge hammer coarse crushing then less than 150mm.
Alloy ingot bar after the finishing coarse crushing is put into alligator, be crushed to particle diameter less than 20mm.Pulverizer tooth plate 600mm * 400mm, broken work number of times is 150 times/min.
Put into twin rollers with pulverizing the back less than the alloy block of 20mm, it is in small, broken bits to carry out pair roller.Twin rollers is made up of the cylinder of two 3Crl3 stainless steels built-up welding, and diameter of cylinder is 500mm, and rolling the face length degree is 500mm, and rotating speed is 25 commentaries on classics/min.
Particle after pair roller is in small, broken bits enters the single-deck vibrating screen screening.The working face of vibratory screening apparatus is of a size of 2000mm * 500mm, and screen cloth is 10 orders (1.8mm).Under the sieve aggregate bin is arranged, be used for particle discharging less than 10 orders (1.8mm).Greater than the particle of 10 orders (1.8mm),, return twin rollers again from sieving another discharge hole for discharge.The circulation that so goes round and begins again can obtain 70 titanium-iron powders less than 10 orders (1.8mm).
The embodiment of above-mentioned first technical scheme of the present invention, batching number is that 96117080.8 given exemplary embodiments is carried out by Chinese patent application.The Chemical Composition of its gained 70 ferrotianiums is as the disclosed Chemical Composition of this patent of invention.Processing step described above and requirement are one of embodiments of the invention.
Two of the embodiment of the invention, with finished product high ferrotianium in 250KW intermediate frequency coreless induction furnace, NaF2 60% in addition, CaF2 10%, the protection slag charge melting of BaCl 30% weight percentage proportioning.Thereafter ingot casting, the demoulding, water cooling, processing step and requirements such as fragmentation at room temperature are all as one of the foregoing description.
Three of the embodiment of the invention: place in the reflective coke process furnace with the high ferrotianium of finished product, be heated to 900 ℃～950 ℃, insert temperature then and be not more than in 80 ℃ the water and cool off, processing step thereafter and requirement are all as one of embodiment.
By above three kinds of processing steps, all can obtain the following high titanium-iron powder of 10 orders (particle diameter is 1.8mm) respectively.With the high ferrotianium of this powdered, press cored-wire preparation technology, the high ferrotianium cored-wire of making can be applicable to the Alloying Treatment of senior Ti-containing steel fully.
Adopt the prepared high titanium ferroally powder of preparation method of the present invention, be suitable for making the high ferrotitanium alloy welding electrode equally.
Claims (4)
1, a kind of method of preparing high titanium ferroally powder, it is a raw material with titanium material waste material, in the open type electrical heater, adds the iron remelting under the slag charge protection, and carries out according to following steps successively: steel scrap is dropped into the process furnace fusing; Aluminum deoxidation; Slagging-off; Throw in liquid level protection slag charge; Drop into titanium material waste material; Stir; The stokehold chemical examination; Liquid level band slag ingot casting; Demoulding cooling; Broken.It is characterized in that: the ingot casting thickness of said liquid level band slag ingot casting is not more than 150mm, the demoulding when treating that ingot bar is condensed to surface temperature and is 900 ℃ to 950 ℃; Said demoulding cooling is that the water that the ingot bar after the demoulding places temperature to be not more than 80 ℃ is cooled off, and when treating that ingot bar is cooled to 200 ℃～300 ℃, goes out water-air cooling; And said fragmentation is to be cooled to the ingot bar fragmentation of room temperature and powdering.
2, a kind of method of preparing high titanium ferroally powder is characterized in that, it adopts the high ferrotianium of finished product to add the covering slag remelting in the open type electrical heater; After producing high ferrotianium solution, make liquid level band slag ingot casting, its ingot casting thickness is not more than 150mm, the demoulding when treating that ingot bar is condensed to its surface temperature and is 900 ℃ to 950 ℃; Ingot bar after the demoulding is inserted temperature be not more than in 80 ℃ the water and cool off, when treating that ingot bar is cooled to 200 ℃～300 ℃, go out water-air cooling; To be cooled to the ingot bar fragmentation of room temperature and powdering.
3, a kind of method of preparing high titanium ferroally powder, it is characterized in that, it adopts the high ferrotianium of finished product at the process furnace internal heating, to be heated during to 900 ℃～950 ℃, the water that places temperature to be not more than 80 ℃ of coming out of the stove cools off, and is to be cooled during to 200 ℃～300 ℃, goes out water-air cooling, to be cooled to room temperature, carry out fragmentation and powdering.
According to claim 1,2 and 3 described method of preparing high titanium ferroally powder, it is characterized in that 4, said fragmentation divided for three steps carried out at least: i.e. coarse crushing, its particle diameter is less than 150mm; In broken, its particle diameter is less than 2mm; In small, broken bits, its particle diameter is less than 1.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98111473A CN1083898C (en) | 1998-08-28 | 1998-08-28 | Method of preparing high titanium ferroally powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98111473A CN1083898C (en) | 1998-08-28 | 1998-08-28 | Method of preparing high titanium ferroally powder |
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| Publication Number | Publication Date |
|---|---|
| CN1213704A true CN1213704A (en) | 1999-04-14 |
| CN1083898C CN1083898C (en) | 2002-05-01 |
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ID=5221448
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98111473A Expired - Fee Related CN1083898C (en) | 1998-08-28 | 1998-08-28 | Method of preparing high titanium ferroally powder |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323183C (en) * | 2005-04-15 | 2007-06-27 | 李春德 | Method for jpreparing high ferrotitanium in use for smelting steel |
| CN1332042C (en) * | 2005-11-28 | 2007-08-15 | 左生华 | Aluminium-rare-earth core-spun yarn |
| CN102330010A (en) * | 2010-11-16 | 2012-01-25 | 首钢贵阳特殊钢有限责任公司 | Bismuth cored wire |
| CN103509957A (en) * | 2013-10-24 | 2014-01-15 | 攀枝花学院 | Method for producing high ferro-titanium alloy by using titanium slag and titanium concentrate as titanium and iron raw materials |
| CN103924035A (en) * | 2014-04-08 | 2014-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Titanium-aluminum core-spun yarn and application thereof, titanium alloying molten steel and preparation method thereof, and titanium-containing alloy steel |
| CN105779820A (en) * | 2016-03-25 | 2016-07-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method for low-impurity-content ferrotitanium |
| CN105943198A (en) * | 2016-05-24 | 2016-09-21 | 李雷 | Combined stent used for TIPS operation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054165C (en) * | 1996-09-02 | 2000-07-05 | 江苏江南铁合金厂 | High titanium iron preparing method |
-
1998
- 1998-08-28 CN CN98111473A patent/CN1083898C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323183C (en) * | 2005-04-15 | 2007-06-27 | 李春德 | Method for jpreparing high ferrotitanium in use for smelting steel |
| CN1332042C (en) * | 2005-11-28 | 2007-08-15 | 左生华 | Aluminium-rare-earth core-spun yarn |
| CN102330010A (en) * | 2010-11-16 | 2012-01-25 | 首钢贵阳特殊钢有限责任公司 | Bismuth cored wire |
| CN102330010B (en) * | 2010-11-16 | 2013-10-30 | 首钢贵阳特殊钢有限责任公司 | Bismuth cored wire |
| CN103509957A (en) * | 2013-10-24 | 2014-01-15 | 攀枝花学院 | Method for producing high ferro-titanium alloy by using titanium slag and titanium concentrate as titanium and iron raw materials |
| CN103924035A (en) * | 2014-04-08 | 2014-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Titanium-aluminum core-spun yarn and application thereof, titanium alloying molten steel and preparation method thereof, and titanium-containing alloy steel |
| CN103924035B (en) * | 2014-04-08 | 2016-05-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Titanium aluminium core cabling wire and application thereof and Ti Alloying molten steel and preparation method thereof and a kind of titaniferous steel alloy |
| CN105779820A (en) * | 2016-03-25 | 2016-07-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method for low-impurity-content ferrotitanium |
| CN105779820B (en) * | 2016-03-25 | 2017-07-04 | 攀钢集团攀枝花钢铁研究院有限公司 | The production method of low impurity content ferrotianium |
| CN105943198A (en) * | 2016-05-24 | 2016-09-21 | 李雷 | Combined stent used for TIPS operation |
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| CN1083898C (en) | 2002-05-01 |
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