CN106929617A - A kind of method that laser melting coating prepares furnace retaining type blast furnace carbon brick - Google Patents
A kind of method that laser melting coating prepares furnace retaining type blast furnace carbon brick Download PDFInfo
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- CN106929617A CN106929617A CN201710340569.6A CN201710340569A CN106929617A CN 106929617 A CN106929617 A CN 106929617A CN 201710340569 A CN201710340569 A CN 201710340569A CN 106929617 A CN106929617 A CN 106929617A
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- CN
- China
- Prior art keywords
- carbon brick
- laser melting
- melting coating
- cladding
- coating
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
- C21B7/06—Linings for furnaces
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
Abstract
The invention provides a kind of method that laser melting coating prepares furnace retaining type blast furnace carbon brick, first treat cladding micropore carbon brick substrate surface using 400 mesh abrasive paper for metallograph and polished, cleaned with clear water, dried 2 hours in the range of 120 150 DEG C in the dryer；Cladding material formula be by volume ratio be 1：What 1 TiN, TiC ceramic powders were constituted, powder is mixed using drum-type meal mixer, it is 8~12h to uniform to mix the powder time；By the way of synchronous powder feeding system, in the case where air pressure is for the argon atmosphere of 0.01MPa~1MPa, laser cladding of material is carried out into laser melting coating in micropore carbon brick substrate surface, after the completion of laser melting coating, the hard alloy coating to micropore carbon brick substrate surface is polished.Finally in one layer of dystectic TiN, TiC, Ti (C, N) mixture protective layer of micropore carbon brick matrix surface cladding; play a part of high temperature resistant, resistant to corrosion, anti-circulation during molten iron Long Term Contact to wash away; suppress erosion of the molten iron to carbon brick, extension cupola well, the life of bottom.
Description
Technical field
The side of furnace retaining type blast furnace carbon brick is prepared the invention belongs to technical field of refractory materials, more particularly to a kind of laser melting coating
Method.
Background technology
Blast furnace crucibe is due to storing red-hot molten iron, it is impossible to realize hot repair, thus the life-span of carbon block lining decides
Campaign life.Blast-furnace production campaign common at this stage is general at 15 years or so, and some blast furnaces do not reach generation furnace life just at all
Overhaul is built by laying bricks or stones again, and What is more causes the serious accidents such as burn-through of furnace hearth generation consequence very serious.With modern blast furnace increasingly
Strengthening smelting technology is maximized and realized, blast furnace overhaul expense is improved, the extension life of the blast furnace turns into iron-smelter reduces cost, increases
Plus the main target of benefit.
In order to extend the life of the blast furnace, corroding occur in cupola well in most of blast furnaces, and water temperature difference is protected after raising using titaniferous material
Stove.It was verified that the TiO2 in titaniferous material is in furnace reduction, dystectic Ti (C, N) deposit can be generated, had to furnace bottom
Protective effect, many blast furnaces also achieve the effect of longevity.But, some Study on Problems for existing to titaniferous material furnace retaining at present
Not enough, as titaniferous material consumption is bigger than normal, the furnace retaining cycle is long, furnace retaining effect difference etc..Therefore, the cupola well of blast furnace needs a kind of tool
There are high temperature resistant, resistant to corrosion, the carbon brick of anti-circulation performance of flushing.
In recent years, Japan, Germany, U.S. etc. did a lot of work in terms of carbon brick quality is improved, and developed production micro-
Want raw material, mid temperature pitch to make binding agent based on the new raw material and new technology of hole carbon brick, such as use high temperature electric calcined anthracite, use
Si、SiC、A12O3Micro mist makees additive, the microporous carbon brick that production iron-resistant water penetration ability is strong, resistance to molten iron washes away.Si、SiC、
A12O3Micro mist can be filled into the more fine pore between particle, can improve the institutional framework of brick fuel, improve the compactness of carbon brick.
But the method is the uniform addition fine powder in whole carbon brick manufacturing process, anti-erosion effect is poor compared with Ti (C, N).
Laser melting and coating technique is a kind of wear-resisting, heat-resisting, anti-oxidant and corrosion-resistant coating the surface of the acquisition being widely recognized as
Technology, is also a kind of to realize the forming technique that workpiece is remanufactured.It with the laser beam of high-energy-density is thermal source in base material table that it is
One layer of alloy material of face cladding, makes cladding layer realize metallurgical binding with base material, and form entirely different with original in substrate surface
The surface modifying method of composition, the alloy-layer of performance.The technology has lot of advantages：Such as（1）Laser energy density is high, heating speed
Degree is fast, small to base material heat affecting, easily realizes automation.（2）Can be by the dilution control of base material in extremely low scope.（3）Cladding
, with base material into metallurgical binding, bond strength is high, it is ensured that coating is difficult for drop-off in use for layer.（4）Can be also used for
The treatment of waste product part, largely saves processing cost, and the pollution to environment is small etc..
The content of the invention
The invention provides a kind of method that laser melting coating prepares furnace retaining type blast furnace carbon brick, using laser melting and coating process micro-
Hole carbon brick matrix surface one layer of dystectic TiN, TiC, Ti (C, N) mixture protective layer of cladding, in molten iron Long Term Contact process
In play a part of high temperature resistant, resistant to corrosion, anti-circulation and wash away, suppress erosion of the molten iron to carbon brick, extension cupola well, the life of bottom,
Finally realize prolonging campaign, the reduction of ironmaking cost.
In order to achieve the above object, the present invention is realized using following technical scheme：
The present invention provides a kind of method that laser melting coating prepares furnace retaining type blast furnace carbon brick, comprises the following steps：
（1）, micropore carbon brick substrate surface pre-treatment：First cladding micropore carbon brick substrate surface is treated using 400 mesh abrasive paper for metallograph to enter
Row polishing, is cleaned with clear water, is dried 2 hours in the range of 120-150 DEG C in the dryer；
（2）, laser cladding of material preparation：Cladding material formula be by volume ratio be 1：1 TiN, TiC ceramic powders are constituted
, powder is mixed using drum-type meal mixer, it is 8~12h to uniform to mix the powder time；
（3）, laser melting and coating process：By the way of synchronous powder feeding system, according to default latticed scanning track, it is in air pressure
Under the argon atmosphere of 0.01MPa~1MPa, laser cladding of material is carried out into laser melting coating, institute in micropore carbon brick substrate surface
The laser power of laser melting coating is stated for 3~4kW, spot diameter is 0.1mm~6mm, powder feeding rate is 1g/min~40g/min, is swept
Speed is retouched for 20mm/s~30mm/s；Coating layer thickness is 4~10mm after laser melting coating, and coating forms an entirety, jail with matrix
Gu it is tear-away；
（4）After the completion of laser melting coating, power supply and source of the gas are closed, the hard alloy coating to micropore carbon brick substrate surface is polished.
Wherein, the granularity of TiN, TiC ceramic powders is：50~100 μm.
Compared with prior art, the beneficial effects of the invention are as follows：
1) the furnace retaining type blast furnace carbon brick prepared using laser melting coating of the invention, its dense structure is uniform, pore-free, with matrix
Bond strength is high, and width and thickness are accurately controlled, and can improve the property such as wear-resisting, anti-corrosion, heat-resisting, anti-oxidant on micropore carbon brick surface
Energy；
2）Method of the present invention can substantially reduce the danger of crackle generation, disclosure satisfy that practical application needs, TiN,
TiC, Ti (C, N) mixture is transition metal carbide, with high-melting-point, high rigidity, excellent chemical stability and corrosion-resistant
Property, it is the important source material of hard alloy, there is good compatibility with carbon；
3）The method of the invention is simple, cost is relatively low, easily operated, is easy to promote the use of on a large scale.
Specific embodiment
Embodiment 1：
A kind of method that laser melting coating prepares furnace retaining type blast furnace carbon brick, comprises the following steps that：（1）, before micropore carbon brick substrate surface
Treatment：First cladding micropore carbon brick substrate surface is treated using 400 mesh abrasive paper for metallograph to be polished, cleaned with clear water, in dryer
Dried 2 hours in the range of interior 120 DEG C；（2）, laser cladding of material preparation：Cladding material formula be by volume ratio be 1：1
What TiN, TiC ceramic powders were constituted, powder is mixed using drum-type meal mixer, it is 8h to uniform to mix the powder time；（3）, laser melting coating work
Skill：By the way of synchronous powder feeding system, in the case where air pressure is for the argon atmosphere of 1MPa, by laser cladding of material in micropore carbon brick base
Material surface carries out laser melting coating, and the laser power of the laser melting coating is 3kW, and spot diameter is 6mm, and powder feeding rate is 40g/min,
Sweep speed is 30mm/s；Coating layer thickness is 4mm after laser melting coating, and coating forms an entirety with matrix, firmly not tear-away；
（4）After the completion of laser melting coating, power supply and source of the gas are closed, the hard alloy coating to micropore carbon brick substrate surface is polished.It is described
Laser cladding of material, the granularity of TiN, TiC ceramic powders is 100 μm.
Embodiment 2：
A kind of method that laser melting coating prepares furnace retaining type blast furnace carbon brick, comprises the following steps that：（1）, before micropore carbon brick substrate surface
Treatment：First cladding micropore carbon brick substrate surface is treated using 400 mesh abrasive paper for metallograph to be polished, cleaned with clear water, in dryer
Dried 2 hours in the range of interior 130 DEG C；（2）, laser cladding of material preparation：Cladding material formula be by volume ratio be 1：1
What TiN, TiC ceramic powders were constituted, powder is mixed using drum-type meal mixer, it is 10h to uniform to mix the powder time；（3）, laser melting coating work
Skill：By the way of synchronous powder feeding system, in the case where air pressure is for the argon atmosphere of 0.8MPa, by laser cladding of material in micropore carbon brick
Substrate surface carries out laser melting coating, and the laser power of the laser melting coating is 4kW, and spot diameter is 1mm, and powder feeding rate is 2g/
Min, sweep speed is 20mm/s；Coating layer thickness is 6mm after laser melting coating, and coating forms an entirety, firmly can not with matrix
Come off；（4）After the completion of laser melting coating, power supply and source of the gas are closed, the hard alloy coating to micropore carbon brick substrate surface is polished.
Described laser cladding of material, the granularity of TiN, TiC ceramic powders is 80 μm.
Embodiment 3：
A kind of method that laser melting coating prepares furnace retaining type blast furnace carbon brick, comprises the following steps that：（1）, before micropore carbon brick substrate surface
Treatment：First cladding micropore carbon brick substrate surface is treated using 400 mesh abrasive paper for metallograph to be polished, cleaned with clear water, in dryer
Dried 2 hours in the range of interior 150 DEG C；（2）, laser cladding of material preparation：Cladding material formula be by volume ratio be 1：1
What TiN, TiC ceramic powders were constituted, powder is mixed using drum-type meal mixer, it is 12h to uniform to mix the powder time；（3）, laser melting coating work
Skill：By the way of synchronous powder feeding system, in the case where air pressure is for the argon atmosphere of 0.6MPa, by laser cladding of material in micropore carbon brick
Substrate surface carries out laser melting coating, and the laser power of the laser melting coating is 3.5kW, and spot diameter is 2mm, and powder feeding rate is 30g/
Min, sweep speed is 25mm/s；Coating layer thickness is 8mm after laser melting coating, and coating forms an entirety, firmly can not with matrix
Come off；（4）After the completion of laser melting coating, power supply and source of the gas are closed, the hard alloy coating to micropore carbon brick substrate surface is polished.
Described laser cladding of material, the granularity of TiN, TiC ceramic powders is 50 μm.
Embodiment 4：
A kind of method that laser melting coating prepares furnace retaining type blast furnace carbon brick, comprises the following steps that：（1）, before micropore carbon brick substrate surface
Treatment：First cladding micropore carbon brick substrate surface is treated using 400 mesh abrasive paper for metallograph to be polished, cleaned with clear water, in dryer
Dried 2 hours in the range of interior 150 DEG C；（2）, laser cladding of material preparation：Cladding material formula be by volume ratio be 1：1
What TiN, TiC ceramic powders were constituted, powder is mixed using drum-type meal mixer, it is 12h to uniform to mix the powder time；（3）, laser melting coating work
Skill：By the way of synchronous powder feeding system, in the case where air pressure is for the argon atmosphere of 0.4MPa, by laser cladding of material in micropore carbon brick
Substrate surface carries out laser melting coating, and the laser power of the laser melting coating is 3kW, and spot diameter is 0.5mm, and powder feeding rate is 40g/
Min, sweep speed is 30mm/s；Coating layer thickness is 10mm after laser melting coating, and coating forms an entirety, firmly can not with matrix
Come off；（4）After the completion of laser melting coating, power supply and source of the gas are closed, the hard alloy coating to micropore carbon brick substrate surface is polished.
Described laser cladding of material, the granularity of TiN, TiC ceramic powders is 50 μm.
The laser melting coating of table 1 prepares micropore carbon brick service check result
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, technology according to the present invention scheme and its invention
Design is subject to equivalent or change, should all be included within the scope of the present invention.
Claims (3)
1. a kind of method that laser melting coating prepares furnace retaining type blast furnace carbon brick, it is characterised in that comprise the following steps：
（1）, micropore carbon brick substrate surface pre-treatment：First cladding micropore carbon brick substrate surface is treated using 400 mesh abrasive paper for metallograph to enter
Row polishing, is cleaned with clear water, is dried 2 hours in the range of 120-150 DEG C in the dryer；
（2）, laser cladding of material preparation：Cladding material formula be by volume ratio be 1：1 TiN, TiC ceramic powders are constituted
, powder is mixed using drum-type meal mixer, it is 8~12h to uniform to mix the powder time；
（3）, laser melting and coating process：It is the argon atmosphere of 0.01MPa~1MPa in air pressure by the way of synchronous powder feeding system
Under, laser cladding of material is carried out into laser melting coating in micropore carbon brick substrate surface, coating and the matrix of formation form an entirety,
It is firmly not tear-away；
（4）After the completion of laser melting coating, power supply and source of the gas are closed, the hard alloy coating to micropore carbon brick substrate surface is polished.
2. the method that a kind of laser melting coating according to claim 1 prepares furnace retaining type blast furnace carbon brick, it is characterised in that described
The granularity of TiN, TiC ceramic powders be：50~100 μm.
3. the method that a kind of laser melting coating according to claim 1 and 2 prepares furnace retaining type blast furnace carbon brick, it is characterised in that
Described step（3）The laser power of middle laser melting coating is 3~4kW, and spot diameter is 0.1mm~6mm, and powder feeding rate is 1g/min
~40g/min, sweep speed is 20mm/s~30mm/s；Coating layer thickness is 4~10mm after laser melting coating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710340569.6A CN106929617A (en) | 2017-05-15 | 2017-05-15 | A kind of method that laser melting coating prepares furnace retaining type blast furnace carbon brick |
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| CN201710340569.6A CN106929617A (en) | 2017-05-15 | 2017-05-15 | A kind of method that laser melting coating prepares furnace retaining type blast furnace carbon brick |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812684A (en) * | 2010-04-19 | 2010-08-25 | 姚建华 | Method for preparing metal surface laser strengthened coat |
| CN102277018A (en) * | 2011-07-20 | 2011-12-14 | 合肥工业大学 | High-temperature self-lubricating wear-resistant powder coating |
| CN102976755A (en) * | 2012-11-08 | 2013-03-20 | 西北工业大学 | Laser cladding preparation process of Ti(C,N) ceramic |
| CN103014706A (en) * | 2011-09-28 | 2013-04-03 | 柯全 | Ceramic membrane layer on metal surface and preparation method thereof |
| CN103060800A (en) * | 2013-01-28 | 2013-04-24 | 山东建筑大学 | Material for laser cladding of titanium alloy surface and laser cladding method |
| US20130136941A1 (en) * | 2011-11-28 | 2013-05-30 | Kennametal Inc. | Functionally graded coating |
| CN103290406A (en) * | 2013-06-04 | 2013-09-11 | 北京工业大学 | Laser cladding in-situ synthesis ceramic phase reinforced Fe-base cladding layer and preparation method thereof |
| CN104480460A (en) * | 2014-11-24 | 2015-04-01 | 北京航空航天大学 | In-situ preparation of wear-resistant self-lubricating coating on surface of titanium alloy by laser cladding |
-
2017
- 2017-05-15 CN CN201710340569.6A patent/CN106929617A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812684A (en) * | 2010-04-19 | 2010-08-25 | 姚建华 | Method for preparing metal surface laser strengthened coat |
| CN102277018A (en) * | 2011-07-20 | 2011-12-14 | 合肥工业大学 | High-temperature self-lubricating wear-resistant powder coating |
| CN103014706A (en) * | 2011-09-28 | 2013-04-03 | 柯全 | Ceramic membrane layer on metal surface and preparation method thereof |
| US20130136941A1 (en) * | 2011-11-28 | 2013-05-30 | Kennametal Inc. | Functionally graded coating |
| CN102976755A (en) * | 2012-11-08 | 2013-03-20 | 西北工业大学 | Laser cladding preparation process of Ti(C,N) ceramic |
| CN103060800A (en) * | 2013-01-28 | 2013-04-24 | 山东建筑大学 | Material for laser cladding of titanium alloy surface and laser cladding method |
| CN103290406A (en) * | 2013-06-04 | 2013-09-11 | 北京工业大学 | Laser cladding in-situ synthesis ceramic phase reinforced Fe-base cladding layer and preparation method thereof |
| CN104480460A (en) * | 2014-11-24 | 2015-04-01 | 北京航空航天大学 | In-situ preparation of wear-resistant self-lubricating coating on surface of titanium alloy by laser cladding |
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Application publication date: 20170707 |