CN102212820A - High-temperature-wear-resistant lining plate for coke pot for coke dry quenching and preparation method thereof - Google Patents
High-temperature-wear-resistant lining plate for coke pot for coke dry quenching and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a preparation method of a high-temperature-wear-resistant lining plate for a coke pot for coke dry quenching. The high-temperature-wear-resistant lining plate is prepared by cladding a metal ceramic layer on a metal lining plate. The preparation method comprises the following steps: (1) preparing uniformly mixed metal ceramic powder; (2) brushing light absorbing coatings on the surface of the metal lining plate uniformly; (3) after the coating of the light absorbing coatings is dry, feeding the powder pneumatically or feeding the powder by way of powder spreading or gravity, wherein the thickness of the powder layer is 0.5-4.0mm; and (4) scanning the metal ceramic powder which has been spread or delivered in place by virtue of a high power laser and forming the cladded high-temperature-wear-resistant metal ceramic layer on the metal lining plate. By utilizing the method to prepare the high-temperature-wear-resistant metal lining plate for the coke pot for coke dry quenching, low cost and stable production quality are ensured, and implementation is convenient; and the method is convenient for mass production and has prominent economic and social benefits.
Description
Technical field
The present invention relates to a kind of dry coke quenching and use high temperature wear resistant liner plate and preparation method thereof for burnt jar, belong to the mechanical processing technique field.
Background technology
Along with development of modern industry, demand for coke grows with each passing day, dry quenching(of coke) technology is the production technique that adopts the inertia recycle gas to extinguish red-hot coke and reclaim the coke waste heat in the coking production, this technology can fully reclaim the waste heat of 1050 ℃ of red coke, and can realize the zero release of pollutant of quenching production technique link reaching the energy-saving and environmental protection purpose.
In the dry quenching(of coke) production technique, burnt jar is the visual plant that runs through whole process of production.About 1050 ℃ the red coke that its acceptance is released from coke oven moves to the coke quencher top by towing mechanism, lifting gear, and enters coke quencher by the dress coke installation.Therefore burnt jar long operational time, work under bad environment have relatively high expectations.
Burnt jar mainly is made of welded construction skeleton and liner plate.The effect of liner plate is that sealing coke and the burnt jar structure of protection are not burnt out, so require high temperature resistant, the anti-chilling and shock heating of liner plate, anti-medium impact, wear-resistant, otherwise scorification easily takes place or crack owing to coke impacts, the cracked accident of liner plate appears in the work, cause liner plate to be shed on the burnt belt of fortune, damage belt; Simultaneously, very easily make burnt jar structure generation thermal distortion even scaling loss after the liner plate damage, have a strong impact on the normal operation of production.And picking up broken liner plate in the coke quencher is a breakneck job, because be full of nitrogen and CO (carbon monoxide converter) gas in the coke quencher.Therefore, the safe operation of selecting for use the life-span that directly has influence on burnt jar and enterprise to produce of burnt jar of liner plate.
A domestic main iron and steel enterprise and coal chemical enterprise burnt jar liner plate in the dry coke quenching method has mainly been selected at present: side plate multiselect RTCr16 heat resisting iron, QT600-3, ZG35Cr24Ni7, ZG3Cr7Si2, heat-resistance stainless steel 20X
23H18 etc., and the base plate multiselect that withstands shocks is with ZG35Cr24Ni7, ZG3Cr7Si2, heat-resistance stainless steel 20X
23H18 etc.Heat-resistance stainless steel 20X
23No matter H18 is at physicochemical property, still all be preferably aspect heat-proof quality, can bear 1130 ℃ of effects repeatedly below the high temperature, but when using it to make burnt jar of liner plate of dry coke quenching, find its cost height, per ton reaching more than 200,000, processing characteristics is relatively poor, make difficulty, and domesticly do not have a manufacturer, need import; Though QT600-3, RTCr16 heat resisting iron material price are suitable, exist hardness height, fragility big, be difficult for processing, can't repair, the poor-performing of anti-the chilling and shock heating, can only be used for side plate, work-ing life is low; ZG35Cr24-Ni7SiN, ZG3Cr7Si2 etc. are used for base plate more to be impacted than large part, anti-chilling and shock heating better performances, processing characteristics are better, but, its heat-proof quality is relatively poor, the high temperature wear resistant poor performance, be prone to wearing and tearing and crackle in the use, cause the liner plate cracking broken, 2-3 month mean life.
In recent years,, carried out a lot of research work both at home and abroad, mainly concentrated on the research aspect of single material at the high temperature wear problem of the burnt jar liner plate of dry coke quenching.Since single material intensity, hardness, plasticity, high temperature resistant, resistance to wear, aspect performance such as heat insulation and heat-shock resistance can not take into account, so burnt jar of liner plate work-ing life of developing is generally short, reliability is low, can't satisfy the requirement that long-time continuous is produced under the working condition of dry coke quenching method production scene.Comprehensive current material is studied, and finds that the simple substance material that satisfies above-mentioned requirements is difficult to realize.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of novel dry coke quenching and uses high temperature wear resistant metal backing and preparation method thereof for burnt jar, and it can satisfy burnt jar of anti-ablation of liner plate of dry coke quenching, high temperature wear resistant, good heat-proof quality, anti-chilling and shock heating performance, be easy to processing and cheap.
For addressing the above problem, the technical scheme that the present invention takes is as follows:
The invention provides a kind of novel dry coke quenching and use the high temperature wear resistant liner plate for burnt jar, it has broken through the single layer structure of metal backing, is made of at the lip-deep cermet coating of metal backing metal backing and cladding.
The present invention also provides burnt jar of above-mentioned dry coke quenching, and it carries out according to following step with the preparation method of high temperature wear resistant liner plate:
(1) prepares mixed uniformly metal ceramic powder;
(2) extinction coating is evenly brushed on the metal backing surface;
(3) after the coating for the treatment of extinction coating is done, adopt the method for pneumatic powder feeding, perhaps spread the powder mode, perhaps gravity automatic powder feeding system powder feeding, powder layer thickness reaches 0.5～4.0mm;
(4) by high power laser scanning metal ceramic powder that complete or that conveying puts in place, on metal backing, form the high temperature wear resistant cermet coating of cladding, concrete processing parameter is as follows:
Laser power P=1000～10000W,
Spot diameter 3～15mm,
Overlapping rate 10～50%,
Argon shield,
Scan velocity V=100～1000mm/min.
Preferably, described metal ceramic powder composition quality per-cent is: C 0.01～0.3%, and Si 0.2～5%, and Cr 3～20%, and Ni 8～35%, and Al 25～50%, and surplus is Fe.
The granularity of described metal ceramic powder is 350 ~ 100 orders; The employing meal mixer mixes.
Before brushing extinction coating, remove the impurity and the oxide skin on metal backing surface in the step (2).
Described metal backing is cast steel, forged steel or cold and hot rolled steel plate, and the heat-resisting working temperature of described metal backing reaches more than 640 ℃; The thickness of high temperature wear resistant cermet coating is 0.8～3.5mm described in the step (4).
Adopt the burnt jar high temperature wear resistant liner plate of dry coke quenching of method preparation of the present invention, owing to adopt the process means of laser melting coating, utilize high energy laser beam at the metal backing surface irradiation, make metal ceramic powder and metal backing surface metal melt rapidly, expand and solidify, has specific physical in the formation of metal backing surface cladding, the sintering metal layer material of chemistry and mechanical property, obtain a kind of new matrix material, make metal backing have outstanding resistance to wearing, corrosion-resistant, characteristic such as high temperature resistant, simultaneously with cast steel, forged steel and cold and hot rolled steel plate are the metal backing base material, guaranteed that the burnt jar liner plate of sintering metal has good impact resistance, can bring into play the material property potentiality to greatest extent.Metal ceramic powder adopts the meal mixer uniform mixing.Because the fusing point of used metal ceramic powder is very high, be difficult to it and other metallic substance are formed metallurgical binding by traditional process means, utilize high power laser to concentrate the energy of high energy beam, make this metal ceramic powder and metal backing surface metal generation metallurgical reaction, obtain the ceramic cladding layer-metal of different thickness on the metal backing surface as required, made the matrix material liner plate.This matrix material liner plate has good performance, the ceramic cladding layer-metal fusing point height on surface, can under the hot environment below 1300 ℃, work, and at high temperature keep performance variation very little, has high temperature inert, its hardness has the excellent high-temperature abrasion resistance properties near 55HRC, is suitable for the bad working environments of burnt jar of dry coke quenching.
By the high-power laser cladding metal ceramic powder, in the resulting cermet coating, the disperse Cr that distributing on the austenite matrix of Al and Ni, Cr alloy
3C
2The hard phase has ideal high temperature and abrasive-particle wear resistant and stiff dough polishing machine, and it still has very high Young's modulus in hot environment, is particularly suitable for making thermal structure; Simultaneously, the anti-chilling and shock heating performance of cermet coating is outstanding, and it is heated rapidly to more than 1100 ℃, directly drops in the water, and ceramic cladding layer-metal can not ftracture yet.In addition, the heat insulating ability of ceramic cladding layer-metal is good, and its thermal conductivity is extremely low, and thermal conductivity only is stainless 1/12, often use as thermal barrier coating, and its thermal conductivity substantially raises with temperature and change, and is very stable.Because matrix is to use cast carbon steel, casting manganese steel, forged steel and cold and hot rolled steel plate material, so the processing characteristics of its metal backing is good, can satisfy the requirement of the burnt jar interior lining panel of different size and shape, method by the laser melting coating metal ceramic powder prepares the burnt jar liner plate of dry coke quenching again, satisfies the needs that the coal chemical enterprise user produces fully.
Adopt laser melting and coating process casting manganese steel, in low carbon element cast steel, casting alloy structure iron, forged steel and cold and hot rolled steel plate surface cladding 0.8～3.5mm cermet coating, original used heat-resistance stainless steel liner plate, ZG3Cr7Si2, the ZG35Cr24Ni7SiN of the burnt jar liner plate of the dry coke quenching that makes thus has better high temperature resistant, wear-resistant, heat-proof quality, and has good obdurability and workability energy.
In the situ production reality, record burnt jar of the dry coke quenching of selecting the unlike material liner plate for use under burnt 5 minutes situations of dress by infrared thermometer, its temperature rise situation contrast of burnt tank wall different sites is as shown in table 1:
The burnt tank wall keypoint part of table 1 temperature rise contrast
In the table: burnt jar of 80 blocks of traditional Z G35Cr24Ni7SiN liner plates adopted in A-awl section and bottom,
The burnt jar of the ZG35CrMo liner plate of 80 thick cermet coatings of laser melting coating 2.0mm is adopted in B-awl section and bottom.
Adopt the burnt jar of traditional heat-resistance stainless steel and ZG35Cr24Ni7SiN material, have following subject matter:
(1) burnt jar of liner plate life-span low, average 2 ~ 3 months, change frequent, the cost height, labour intensity is big;
(2) because traditional liner plate heat-proof quality is poor, and temperature rise is fast, the burnt jar of easy thermal distortion of one-piece construction causes the burnt jar structure life-span low, and particularly the connection place easily gets loose, poor reliability;
(3) burnt jar welded construction is because thermal distortion easily causes the welded weld cracking of tank body, and reliability is low;
(4) burnt jar base cone tradition liner plate is because scaling loss easily takes place in the gravity and the thermal stresses comprehensive action of bearing hot coke under comparatively high temps, its permissible stress is very low, and the device security coefficient is low.
The present invention adopts burnt jar of the dry coke quenching of surface laser cladding cermet coating metal backing, has solved the canned above-mentioned outstanding problem that is equipped with of traditional Jiao:
(1) cladding has metal backing mean lifetime 8-12 month of cermet coating, and more traditional liner plate life-span improves more than 3 times, has reduced enterprise's production cost and labour intensity;
(2) cladding has the metal backing heat-proof quality of cermet coating good, its thermal conductivity is stainless 1/12, the feasible different sites that adopts the burnt tank wall of this liner plate, temperature rise has reduced about 200 ℃, make thermal distortion reduce by 1/2, improve burnt jar of can body stress condition, guaranteed burnt jar of integral solder reliability of structure;
(3) special cladding at end gate place has the metal backing of cermet coating, its the highest withstand temp is 1650 ℃, and between 650 ℃ ~ 1300 ℃ high-temperature zones, have outstanding thermotolerance, wear resistance and shock-resistance, has the incomparable advantage of general alloy, burning phenomenon can not take place, improved burnt jar security.
In addition, defectives such as the metal backing of cladding cermet coating surface flawless because its excellent heat insulation property has reduced the temperature rise of whole device, have realized the protection to the coke tank truck body, have prolonged the work-ing life of whole device.
Adopt the metal backing of cladding cermet coating, more traditional stainless steel dry coke quenching liner material quality, its cost is low, and every square meter cost on average reduces about about 30%-50%.Cladding has the dry coke quenching metal backing of cermet coating to have good high temperature wear resistant characteristic, thermal insulation and shock-resistant characteristic, than 3～5 times of conventional cast stainless steel lining slab integral life-span raisings, reduce liner plate and changed number of times, the needs of producing under the continuously long-time bad working environments of dry coke quenching method have been satisfied, simultaneously, reduce production costs and maintenance cost is 2 ~ 3 times, improved security and the reliability of equipment operation.
Through the production practice rough estimates, use 3 burnt jars to be example with a dry coke quenching production line, after adopting cladding cermet coating metal backing, prolonged metal backing and dry coke quenching Jiao jar work-ing life, can be about 2,000,000 yuan for enterprise saves cost in 1 year, if considered therefore to have reduced the stopping production loss that the replacing liner plate causes, reduced the maintenance cost of the burnt jar of dry coke quenching, reduced the labour cost of changing liner plate, for a dry coke quenching production line, annual for enterprise reduces consumption, the direct economic benefit that is brought is more than 3,000,000 yuan.
Consider domestic present 157 dry coke quenching production lines, after if the burnt jar of these production lines all adopts cladding cermet coating metal backing, only dry coke quenching liner plate and the normal replacing of burnt jar are one, and can consume every year for country reduces, and produces 4.7 hundred million direct economic benefit.
Because the dry coke quenching coke is the raw material of big blast furnace the best, simultaneously Dry Quenching Technology has the advantage of environmental protection such as energy-conservation, consumption reduction and zero release and recycling economy, be the technology that country widelys popularize at present, by national integrated planning, build up 400 dry coke quenching production lines in 5 years the most at last, when the time comes, because being extensive use of of cladding cermet coating metal backing, will bring direct economic benefit more than 1,200,000,000 every year for country.
To sum up, the beneficial effect that technique scheme produces is: burnt jar of the dry coke quenching of cladding cermet coating is strong with the preparation process process controllability of high temperature wear resistant metal backing, cost is low, the quality of production is stable, and implement conveniently, be convenient to scale operation, have outstanding economic benefit and social benefit.
Embodiment
Embodiment 1
(1) metal ceramic powder for preparing by three-dimensional meal mixer uniform mixing, the mass percent of each composition is in this metal ceramic powder: C 0.25%, and Si 0.35%, and Cr 18%, and Ni 32%, and Al 40%, and surplus is Fe; Granularity is 180 orders;
(2) use the shot-peening way to remove the oxide skin and the impurity on 15CrMo heat-resisting steel sheet and plate metal backing surface; With brush with extinction coating---evenly brushing is on above-mentioned metal backing surface for the black burnt black ink, and precoating thickness is 0.03 mm;
(3) natural air drying burnt black ink coating; Adopt the method for pneumatic powder feeding, powder sending quantity is 4.0L/min;
(4) under argon shield, by 5kW high power laser scanning metal ceramic powder, laser power P=3500W, spot diameter 5mm, overlapping rate 30%, scan velocity V=500mm/min, with the powdered alloy cladding on the metal backing surface.
Burnt jar of high temperature wear resistant plate of the dry coke quenching of this method preparation, surface cladding has the thick cermet coating of 1.7mm, cladding layer smooth surface, flawless.
Embodiment 2
(1) metal ceramic powder for preparing by V-type meal mixer uniform mixing, the mass percent of this metal ceramic powder is: C 0.2%, Si 1.2%, Cr 15%, Ni 25%, Al 35%, surplus is Fe, the granularity of metal ceramic powder is 180 orders;
(2) remove the oxide skin on cast steel 40Mn2 metal backing surface with cutting with scissors grinding machine; Evenly brushing is on the metal backing surface with black burnt black ink extinction coating with brush, and precoating thickness is 0.03mm;
(3) natural air drying burnt black ink coating; Adopt the method for pneumatic powder feeding then, powder sending quantity is 3.3L/min;
(4) under argon shield, by 5kW high power laser scanning metal ceramic powder, laser power P=3200W, spot diameter 5mm, overlapping rate 30%, scan velocity V=450mm/min, with the metal ceramic powder cladding on the metal backing surface.
Burnt jar of high temperature wear resistant plate of the dry coke quenching of this method preparation, surface cladding has the thick cermet coating of 1.6mm, cladding layer smooth surface, flawless.
Embodiment 3
(1) metal ceramic powder for preparing by planetary ball mill meal mixer uniform mixing, the mass percent of this metal ceramic powder is: C 0.15%, and Si 0.75%, Cr20%, Ni 33%, and Al 30%, and surplus is Fe, and the granularity of metal ceramic powder is 180 orders;
(2) remove the oxide skin on ZG35CrMo metal backing surface with sand paper; Evenly brushing is on the metal backing surface with black burnt black ink extinction coating with brush, and precoating thickness is 0.05mm;
(3) dry up the burnt black ink coating by blower; Adopt the method for gravity powder feeding, powder sending quantity is 3.0L/min;
(4) under argon shield, by 5kW high power laser scanning metal-powder, laser power P=3300W, spot diameter 5mm, overlapping rate 40%, scan velocity V=450mm/min, with the metal ceramic powder cladding on the metal backing surface.
Burnt jar of high temperature wear resistant plate of the dry coke quenching of this method preparation, surface cladding has the thick cermet coating of 2.0mm, cladding layer smooth surface, flawless.
Embodiment 4
(1) metal ceramic powder for preparing by three-dimensional meal mixer uniform mixing, the mass percent of this metal ceramic powder is: C 0.15%, and Si 0.75%, Cr20%, Ni 33%, and Al 30%, and surplus is Fe, and the granularity of metal ceramic powder is the 220-180 order;
(2) remove the oxide skin on 35CrMo forged steel metal backing surface with blasting method; Evenly brushing is on the metal backing surface with grey extinction coating with brush, and precoating thickness is 0.02mm;
(3) natural air drying coating; Adopt the method for shop powder, be divided into the shop powder three times, spread powder thickness is 1mm at every turn;
(4) under argon shield, by the metal-powder that three scanning of 5kW high power laser scanning is completed, laser power P=3600W, spot diameter 3mm, overlapping rate 10%, scan velocity V=400mm/min, with the metal ceramic powder cladding on the metal backing surface.
Burnt jar of high temperature wear resistant plate of the dry coke quenching of this method preparation, surface cladding has the thick cermet coating of 2.0mm, cladding layer smooth surface, flawless.
Embodiment 5
(1) metal ceramic powder for preparing by V-type meal mixer uniform mixing, the mass percent of this metal ceramic powder is: C 0.12%, and Si 0.75%, Cr19%, Ni 33%, and Al 29%, and surplus is Fe, and the granularity of powdered alloy is the 240-190 order;
(2) remove the oxide skin on 35CrMo steel sheet metal liner plate surface with blasting method; Evenly brushing is on the metal backing surface with grey extinction coating with brush, and precoating thickness is 0.02mm;
(3) natural air drying coating; Metal ceramic powder by the milky white adhesive uniform mixing, is placed the metal backing surface by brushing method, be divided into the secondary brushing, each brushing thickness is 1.5mm;
(4) under argon shield, by the metal-powder that three scanning of 5kW high power laser scanning is completed, laser power P=3700W, spot diameter 5mm, overlapping rate 20%, scan velocity V=470mm/min, with the metal ceramic powder cladding on the metal backing surface.
Burnt jar of high temperature wear resistant plate of the dry coke quenching of this method preparation, surface cladding has the thick cermet coating of 2.2mm, cladding layer smooth surface, flawless.
Embodiment 6
(1) metal ceramic powder for preparing by V-type meal mixer uniform mixing, the mass percent of this metal ceramic powder is: C 0.13%, and Si 0.70%, Cr17%, Ni 31%, and Al 30%, and surplus is Fe, and the granularity of metal ceramic powder is 300 orders;
(2) remove the oxide skin on Q345R heat-resisting steel sheet and plate metal backing surface with blasting method; Evenly brushing is on the metal backing surface with black light-absorbing coating with brush, and precoating thickness is 0.03mm;
(3) natural air drying coating; Adopt the method for pneumatic powder feeding, powder sending quantity is 2.8L/min;
(4) under argon shield, by the metal-powder that 6kW high power laser scanning is carried, laser power P=3700W, spot diameter 5mm, overlapping rate 15%, scan velocity V=470mm/min, with the metal ceramic powder cladding on the metal backing surface.
Burnt jar of high temperature wear resistant plate of the dry coke quenching of this method preparation, surface cladding has the thick cermet coating of 2.2mm, cladding layer smooth surface, flawless.
Embodiment 7
(1) metal ceramic powder for preparing by V-type meal mixer uniform mixing, the mass percent of this metal ceramic powder is: C 0.13%, and Si 0.70%, Cr16%, Ni 31%, and Al 30%, and surplus is Fe, and the granularity of metal ceramic powder is 300 orders;
(2) remove the oxide skin on 15CrMo heat-resisting steel sheet and plate metal backing surface with blasting method; Evenly brushing is on the metal backing surface with black light-absorbing coating with brush, and precoating thickness is 0.03mm;
(3) natural air drying coating; Adopt the method for gravity powder feeding, powder sending quantity is 2.8L/min;
(4) under argon shield, by the metal-powder that 6kW high power laser scanning is carried, laser power P=3700W, spot diameter 5mm, overlapping rate 15%, scan velocity V=470mm/min, with the powdered alloy cladding on the metal backing surface.Burnt jar of high temperature wear resistant plate of the dry coke quenching of this method preparation, surface cladding has the thick cermet coating in the 2.0mm left and right sides, cladding layer smooth surface, flawless.
Embodiment 8
(1) metal ceramic powder for preparing by V-type meal mixer uniform mixing, the mass percent of this powdered alloy is: C 0.21%, and Si 0.70%, Cr13%, Ni 28%, and Al 27%, and surplus is Fe, and the granularity of metal ceramic powder is the 320-200 order;
(2) remove the oxide skin on 0Cr18Ni9Ti steel sheet metal liner plate surface with blasting method; Evenly brushing is on the metal backing surface with black light-absorbing coating with brush, and precoating thickness is 0.03mm;
(3) natural air drying coating; Adopt the method for gravity powder feeding, powder sending quantity is 2.4L/min;
(4) under argon shield, by the metal-powder that the 5kW high power laser is carried, laser power P=3300W, spot diameter 5mm, overlapping rate 10%, scan velocity V=500mm/min, with the metal ceramic powder cladding on the metal backing surface.Burnt jar of high temperature wear resistant plate of the dry coke quenching of this method preparation, surface cladding has the thick cermet coating in the 1.8mm left and right sides, cladding layer smooth surface, flawless.
Embodiment 9
(1) metal ceramic powder for preparing by three-dimensional meal mixer uniform mixing, the mass percent of this powdered alloy is: C 0.21%, and Si 0.70%, Cr13%, Ni 28%, and Al 27%, and surplus is Fe, and the granularity of metal ceramic powder is the 320-200 order;
(2) remove the oxide skin on 1Cr18Ni9Ti steel sheet metal liner plate surface with blasting method; Evenly brushing is on the metal backing surface with black light-absorbing coating with brush, and precoating thickness is 0.03mm;
(3) natural air drying coating; Adopt the method for pneumatic powder feeding, powder sending quantity is 2.6L/min;
(4) under argon shield, by the metal-powder that 5kW high power laser scanning is carried, laser power P=3350W, spot diameter 5mm, overlapping rate 20%, scan velocity V=600mm/min, with the metal ceramic powder cladding on the metal backing surface.Burnt jar of high temperature wear resistant plate of the dry coke quenching of this method preparation, surface cladding has the thick cermet coating in the 2.2mm left and right sides, cladding layer smooth surface, flawless.
Embodiment 10
(1) metal ceramic powder for preparing by three-dimensional meal mixer uniform mixing, the mass percent of this powdered alloy is: C 0.21%, and Si 0.70%, Cr13%, Ni 28%, and Al 27%, and surplus is Fe, and the granularity of metal ceramic powder is the 320-200 order;
(2) remove the oxide skin on ZG35CrMo metal backing surface with blasting method; Evenly brushing is on the metal backing surface with black light-absorbing coating with brush, and precoating thickness is 0.03mm;
(3) natural air drying coating; Adopt the method for pneumatic powder feeding, powder sending quantity is 2.6L/min;
(4) under argon shield, by the metal-powder that 2kW high power laser lock for sweep is carried, laser power P=1800W, spot diameter 5mm, overlapping rate 20%, scan velocity V=120mm/min, with the metal ceramic powder cladding on the metal backing surface.Burnt jar of high temperature resistant mill metal of the dry coke quenching of this method preparation decreases plate, and surface cladding has the thick cermet coating in the 0.9mm left and right sides, cladding layer smooth surface, flawless.
Embodiment 11:
(1) metal ceramic powder for preparing by three-dimensional meal mixer uniform mixing, the mass percent of each composition is in this metal ceramic powder: C 0.25%, and Si 0.35%, and Cr 18%, and Ni 32%, and Al 40%, and surplus is Fe; Granularity is 180 orders;
(2) use the shot-peening way to remove the oxide skin on 15CrMo cast steel metal backing surface; Evenly brushing is on the metal backing surface with black burnt black ink extinction coating with brush, and precoating thickness is 0.03mm;
(3) natural air drying burnt black ink coating; Adopt the method for pneumatic powder feeding, powder sending quantity is 3.6L/min;
(4) by 5kW high power laser scanning metal ceramic powder, laser power P=4500W, spot diameter 5mm, overlapping rate 20%, scan velocity V=800mm/min, with the powdered alloy cladding on the metal backing surface.Burnt jar of high temperature wear resistant plate of the dry coke quenching of this method preparation, surface cladding has the thick cermet coating of 2.5mm, cladding layer smooth surface, flawless.
Embodiment 12:
(1) metal ceramic powder for preparing by three-dimensional meal mixer uniform mixing, the mass percent of each composition is in this metal ceramic powder: C 0.25%, and Si 0.2%, and Cr 15%, and Ni 8%, and Al 40%, and surplus is Fe; Granularity is 180 orders;
(2) use the shot-peening way to remove the oxide skin on 35CrMo cast steel metal backing surface; Evenly brushing is on the metal backing surface with black burnt black ink extinction coating with brush, and precoating thickness is 0.03mm;
(3) natural air drying burnt black ink coating; Adopt the method for pneumatic powder feeding, powder sending quantity is 3.2L/min;
(4) argon shield, by 2kW high power laser scanning metal ceramic powder, laser power P=1000W, spot diameter 5mm, overlapping rate 20%, scan velocity V=120mm/min, with the powdered alloy cladding on the metal backing surface.Burnt jar of high temperature wear resistant plate of the dry coke quenching of this method preparation, surface cladding has the thick cermet coating of 2.0mm, cladding layer smooth surface, flawless.
Embodiment 13:
(1) metal ceramic powder for preparing by three-dimensional meal mixer uniform mixing, the mass percent of each composition is in this metal ceramic powder: C 0.01%, and Si 5%, and Cr 8%, and Ni 32%, and Al 25%, and surplus is Fe; Granularity is 180 orders;
(2) use the sandblast way to remove the oxide skin on 12CrMoV cast steel metal backing surface; Evenly brushing is on the metal backing surface with black burnt black ink extinction coating with brush, and precoating thickness is 0.03mm;
(3) natural air drying burnt black ink coating; Adopt the method for pneumatic powder feeding, powder sending quantity is 3.6L/min;
(4) argon shield, by 10kW high power laser scanning metal ceramic powder, laser power P=7500W, spot diameter 15mm, overlapping rate 15%, scan velocity V=400mm/min, with the powdered alloy cladding on the metal backing surface.Burnt jar of high temperature wear resistant plate of the dry coke quenching of this method preparation, surface cladding has the thick cermet coating of 3.5mm, cladding layer smooth surface, flawless.
Claims (10)
1. a dry coke quenching is used the high temperature wear resistant liner plate for burnt jar, it is characterized in that being made of at the lip-deep cermet coating of metal backing metal backing and cladding, and it is prepared from by following method:
(1) prepares mixed uniformly metal ceramic powder;
(2) extinction coating is evenly brushed on the metal backing surface;
(3) after the coating for the treatment of extinction coating is done, adopt the method for pneumatic powder feeding, perhaps spread the powder mode, perhaps gravity automatic powder feeding system powder feeding, powder layer thickness reaches 0.5～4.0mm;
(4) by high power laser scanning metal ceramic powder that complete or that conveying puts in place, on metal backing, form the high temperature wear resistant cermet coating of cladding, concrete processing parameter is as follows:
Laser power P=1000～10000W,
Spot diameter 3～15mm,
Overlapping rate 10～50%,
Argon shield,
Scan velocity V=100～1000mm/min.
2. dry coke quenching according to claim 1 is used the high temperature wear resistant liner plate for burnt jar, and it is characterized in that described metal ceramic powder composition quality per-cent is: C 0.01～0.3%, and Si 0.2～5%, and Cr 3～20%, and Ni 8～35%, and Al 25～50%, and surplus is Fe.
3. dry coke quenching according to claim 1 is used the high temperature wear resistant liner plate for burnt jar, and the granularity that it is characterized in that described metal ceramic powder is 350 ~ 100 orders, adopts meal mixer to mix.
4. dry coke quenching according to claim 1 use the high temperature wear resistant liner plate for burnt jar, it is characterized in that describedly being in the step (2) before brushing extinction coating the impurity and the oxide skin on removing metal backing surface.
5. dry coke quenching according to claim 1 is used the high temperature wear resistant liner plate for burnt jar, it is characterized in that the heat-resisting working temperature of described metal backing reaches more than 640 ℃, and it is cast steel, forged steel or cold and hot rolled steel plate; The thickness of described high temperature wear resistant cermet coating is 0.8～3.5mm.
6. burnt jar of preparation method with the high temperature wear resistant liner plate of dry coke quenching according to claim 1 is characterized in that being prepared according to following step:
(1) prepares mixed uniformly metal ceramic powder;
(2) extinction coating is evenly brushed on the metal backing surface;
(3) after the coating for the treatment of extinction coating is done, adopt the method for pneumatic powder feeding, perhaps spread the powder mode, perhaps gravity automatic powder feeding system powder feeding, powder layer thickness reaches 0.5～4.0mm;
(4) by high power laser scanning metal ceramic powder that complete or that conveying puts in place, on metal backing, form the high temperature wear resistant cermet coating of cladding, concrete processing parameter is as follows:
Laser power P=1000～10000W,
Spot diameter 3～15mm,
Overlapping rate 10～50%,
Argon shield,
Scan velocity V=100～1000mm/min.
7. burnt jar of preparation method of dry coke quenching according to claim 6 with the high temperature wear resistant liner plate, it is characterized in that described metal ceramic powder composition quality per-cent is: C 0.01～0.3%, and Si 0.2～5%, Cr 3～20%, Ni 8～35%, and Al 25～50%, and surplus is Fe.
8. burnt jar of preparation method with the high temperature wear resistant liner plate of dry coke quenching according to claim 6, the granularity that it is characterized in that metal ceramic powder is 350 ~ 100 orders, adopts meal mixer to mix.
9. burnt jar of preparation method with the high temperature wear resistant liner plate of dry coke quenching according to claim 6 is characterized in that in the step (2) removing the impurity and the oxide skin on metal backing surface before brushing extinction coating.
10. burnt jar of preparation method with the high temperature wear resistant liner plate of dry coke quenching according to claim 6 is characterized in that described metal backing is cast steel, forged steel or cold and hot rolled steel plate, and the heat-resisting working temperature of described metal backing reaches more than 640 ℃; The thickness of described high temperature wear resistant cermet coating is 0.8～3.5mm.
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