CN102505117B - Manufacturing method for ceramic-lined composite steel pipe - Google Patents

Manufacturing method for ceramic-lined composite steel pipe Download PDF

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CN102505117B
CN102505117B CN 201110280814 CN201110280814A CN102505117B CN 102505117 B CN102505117 B CN 102505117B CN 201110280814 CN201110280814 CN 201110280814 CN 201110280814 A CN201110280814 A CN 201110280814A CN 102505117 B CN102505117 B CN 102505117B
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steel pipe
ceramic
composite steel
rare earth
lined composite
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CN102505117A (en
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包喜荣
陈林
田忠良
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Inner Mongolia University of Science and Technology
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Inner Mongolia University of Science and Technology
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Abstract

The invention relates to a manufacturing method for a ceramic-lined composite steel pipe, and belongs to the field of pipeline transportation materials. The invention provides an additive, wherein the additive consists of rare earth oxide Y2O3 or La2O3 and silicon dioxide SiO2; the rare earth oxide Y2O3 or La2O3 and the silicon dioxide SiO2 are added into a thermit according to a proportion; the additive accounts for 1-3 percent of the total weight of reaction materials; and after drying, the ceramic-lined composite steel pipe is synthesized by a self-propagating process. The method has the advantages of increasing the compactness of a ceramic layer, improving the hardness of the composite steel pipe, enhancing the wear resistance, improving the corrosion resistance and prolonging the service life, along with fine and smooth inner surface and good texture. The overall performance of the ceramic-lined composite steel pipe is improved, so that the ceramic-lined composite steel pipe becomes an ideal wear-resistant pipeline transportation material; meanwhile, the rare earth resource advantage of China is brought into full play; and the application value of rare earth in the ceramic-lined composite steel pipe is effectively improved.

Description

The manufacture method of ceramic-lined composite steel tube
Technical field
The present invention relates to a kind of preparation method of ceramic-lined composite steel tube, belong to the pipeline transportation Material Field.
Background technology
Fluid line is carried and is spreaded all over the industries such as metallurgy, coal, oil, chemical industry, but the extremely severe environment characteristics such as its serious erosive wear, corrosion failure and high temperature, make common steel tube can not meet service requirements, the specific alloy steel pipe is expensive again, nor may tackle the problem at its root.
Ceramic-lined composite steel tube has good wear-resisting, heat-resisting and corrosion resisting property concurrently because construction costs is low and receives much concern in recent years, but occur the cracking and spalling phenomenon because special transportation environment also there will be unstable causing of quality in use during practical application, affect its work-ing life.For this reason, people start to attempt various additives and improve density and improve its overall performance, and up to the present, people openly report that the additive of attempting only has SiO 2, CrO 3, CaO+Al 2o 3+ SiO 2, ZrO 2these are several, do not relate to rare earth oxide, consider the rare earth resources advantage of China, should give full play to the using value of rare earth in ceramic-lined composite steel tube.
Summary of the invention
The object of the present invention is to provide a kind of manufacture method that can further improve ceramic layer density, microhardness and corrosion resisting property ceramic-lined composite steel tube thereof.
Technical solution:
The manufacture method of ceramic-lined composite steel tube, method steps is as follows:
(1) prepare steel pipe: steel pipe internal-surface is removed to iron rust, and seal the bottom of steel pipe with zinc metal sheet;
(2) batching: the quality of 1 part of aluminium powder coordinates the ferric oxide of 2.96 times of weight parts to prepare thermite, is equipped with the additive of 1%～3% weight part simultaneously, and additive is rare earth oxide Y 2o 3with metal oxide SiO 2, the weight part proportioning is 0.5-1%: 1-2%; Be perhaps rare earth oxide La 2o 3with metal oxide SiO 2, the weight part proportioning is also 0.5-1%: 1-2%.
(4) batch mixing: the thermite prepared and additive are inserted to the charging opening of blender, after add a cover fit sealing, start blender and carry out batch mixing;
(5) charging: by 1.4～1.6gcm -3packing density batch mixing is packed in steel pipe;
(6) dry material: charged steel pipe, oven dry at 110～120 ℃ of temperature, drying time is 2～2.5 hours, purpose is the moisture of removing wherein;
(7) igniting: the steel pipe that will dry after expecting is placed on jig, with transformer, to tungsten filament, is energized to 20-25V, lights surperficial thermite, and thermite reaction is carried out from top to bottom, at steel pipe inner wall, forms one deck Al 2o 3ceramic layer, its thickness is 1～3mm, the metallic iron that reaction generates is discharged from the steel pipe bottom.
Described aluminium powder Al and ferric oxide Fe 2o 3powder particle size is 200 orders.
Rare earth oxide Y 2o 3or La 2o 3with metal oxide SiO 2the weight part proportioning be 0.5%: 2%.
During batch mixing of the present invention, the mixing raw materials time inserted in steel pipe is 20～30 minutes, and dries removal moisture under 110～120 ℃, and the temperature that thermite reaction occurs after igniting is 1100 ℃.
The present invention is in order to overcome the deficiency in above-mentioned technical background, the additive provided is comprised of rare earth oxide Y2O3 or La2O3 and silicon-dioxide SiO2, add in thermite, after oven dry by certainly spreading technique synthesize ceramic lined composite steel tube, layer density, microhardness and the corrosion resisting property thereof of this composite steel tube pottery have had significant raising, make ceramic-lined composite steel tube become desirable erosion resistant pipeline and carry material.
The present invention compared with prior art has the following advantages:
(1) the present invention gives full play to the rare earth resources advantage of China, can effectively promote the using value of rare earth in ceramic-lined composite steel tube.
(2) but appropriate rare earth addition crystal grain thinning, its cleaning action that degass can reduce coating porosity, thereby effectively improves ceramic layer density, microhardness and corrosion resisting property thereof; Simultaneously rare earth addition plays the effect of binding agent, makes self strength increase of ceramic layer.
(3) adding silicon-dioxide in additive is in order to suppress the vigorous reaction of rare earth oxide, and mild combustion processes belongs to the thinner of chemical reaction; While SiO 2can promote the gas-phase escaping process, thereby increase the density of ceramic layer.
(4) rare earth addition Y 2o 3with SiO 2during mixing, its best proportioning is 0.5%: 2%, can make the microstructure densification of ceramic layer, and the performance of ceramic layer reaches best, and microhardness value is 1485kg/mm 2, porosity is 3.2%, corrosion proof measured value is 0.09g.m -2.h -1, rare earth makes the routed intensity σ of the resistance to compression of composite steel tube pup to 206.4Mpa.
(5) rare earth addition La 2o 3and SiO 2add its mechanism of action to the ceramic layer microstructure and Y simultaneously 2o 3similar.When its proportioning is 0.5%: 2%, pottery is organized the finest and closely, and performance is best: the ceramic layer microhardness is 1488kg/mm 2, porosity is 3.0%, corrosion proof measured value is 0.06g.m -2.h -1, make the resistance to compression intensity σ that bursts preach 210.5Mpa.
(6) technique of the present invention is simple, and equipment is simple, environmental protection and energy saving, and production efficiency is high, and cost is cheap.
The accompanying drawing explanation
Fig. 1 process flow diagram;
Fig. 2 ceramic layer composition principle figure;
Fig. 3 ceramic-lined composite steel tube figure;
The synthetic ceramic layer of Fig. 4 embodiment 1 provided by the invention is organized photo;
The XRD figure spectrum of Fig. 5 embodiment 2 ceramic linings provided by the invention;
The SEM figure of the bonding interface of Fig. 6 embodiment 1 ceramic-lined composite steel tube provided by the invention.
Embodiment
Embodiment 1:
Employing is of a size of the Q235 welded tube 2 of Φ 15mm * 3.5mm * 130mm, and welded tube 2 internal surfaces are removed to iron rust, and seals the bottom of steel pipe with zinc metal sheet 4; According to thermite reaction 2Al+Fe 2o 3→ Al 2o 3+ 2Fe+836kJ/mol, Fe 2o 3with the Al stoichiometry be 1: 2.96 by weight ratio, granularity is 200 order analytical pure powder.By additive rare earth oxide Y 2o 3/ La 2o 3with SiO 2within 0.5%: 2% by weight ratio, join in thermite 3, packing density is 1.6gcm -3, the part by weight of each reagent is Al: Fe 2o 3: SiO 2: Y 2o 3/ La 2o 3=73.5%: 24%: 2%: 0.5%.
Light tungsten filament 1, be swift in response and fully, 2 moments of steel pipe redden, and material has a small amount of splash, and coating is even, and the ceramic layer pore-free of generation, surface are moist, of good quality, and quality is the A level, and generating fine and close ceramic layer thickness is 1.6-2mm.
Embodiment 2:
Employing is of a size of the Q235 welded tube 2 of Φ 15mm * 3.5mm * 130mm, and welded tube 2 internal surfaces are removed to iron rust, and seals the bottom of steel pipe with zinc metal sheet 4; According to thermite reaction 2Al+Fe 2o 3→ Al 2o 3+ 2Fe+836kJ/mol, Fe 2o 3with the Al stoichiometry be 2.96: 1 by weight ratio, granularity is 200 order analytical pure powder.By additive rare earth oxide Y 2o 3/ La 2o 3with SiO 2by proportioning, join at 1%: 2% in thermite 3, packing density is 1.6gcm -3, the part by weight of each reagent is Al: Fe 2o 3: SiO 2: Y 2o 3/ La 2o 3=73%: 24%: 2%: 1%.
Light tungsten filament 1, react more violent, 2 moments of steel pipe redden, and certain material splash is arranged, and coating is without obvious pore, smooth surface, and quality is better, but coarse grains, quality is the B level, generating fine and close ceramic layer thickness is 1.5-1.8mm.
Embodiment 3:
Employing is of a size of the Q235 welded tube 2 of Φ 15mm * 3.5mm * 130mm, and welded tube 2 internal surfaces are removed to iron rust, and seals the bottom of steel pipe with zinc metal sheet 4; According to thermite reaction 2Al+Fe 2o 3→ Al 2o 3+ 2Fe+836kJ/mol, Fe 2o 3with the Al chemistry by weight proportioning be 2.96: 1, granularity is 200 order analytical pure powder.By additive rare earth oxide Y 2o 3/ La 2o 3with SiO 2by proportioning, join at 1%: 0% in thermite 3, packing density is 1.6gcm -3, the part by weight of each reagent is Al: Fe 2o 3: SiO 2: Y 2o 3/ La 2o 3=74%: 25%: 0%: 1%.
Light tungsten filament 1, be swift in response and carry out, flare, material is vomited, and welded tube 2 reddens rapidly.After reaction finishes, the ceramic layer of thinner approximately 1mm left and right is only adhered on the surface of welded tube 2 bottoms, and ceramic layer is not enclosed in some place, top, still can see welded tube 2.Owing to not adding SiO 2make reaction very violent, welded tube 2 surfaces of aluminum thermit powder generation splashes.In reaction process, gas is difficult to quick eliminating, so there is spilehole on the ceramic layer surface, second-rate, belongs to the D level.
Table 1 and the properties of table 2 for measuring under rare earth addition proportionings different from silicon-dioxide.
Table 1Y 2o 3with SiO 2ceramic performance measured value under different proportionings
Figure GSB00001102187400031
Figure GSB00001102187400041
Table 2La 2o 3with SiO 2ceramic performance measured value under different proportionings
A---surface is moist, and pottery is of good quality
B---smooth surface, coarse grains, quality is better
C---surface is thick, and pore is arranged, and the ceramic layer quality is general
D---ceramic layer is very thin, and pore is arranged, second-rate

Claims (4)

1. the preparation method of ceramic-lined composite steel tube, is characterized in that, method steps is as follows:
(1) prepare steel pipe: steel pipe internal-surface is removed to iron rust, and seal the bottom of steel pipe with zinc metal sheet;
(2) batching: the quality of 1 part of aluminium powder coordinates the ferric oxide of 2.96 times of weight parts to prepare thermite, is equipped with the additive of 1%～3% weight part simultaneously, and additive is rare earth oxide Y 2o 3with metal oxide SiO 2, the weight part proportioning is 0.5-1%: 1-2%; Be perhaps rare earth oxide La 2o 3with metal oxide SiO 2, the weight part proportioning is also 0.5-1%: 1-2%;
(4) batch mixing: the thermite prepared and additive are inserted to the charging opening of blender, after add a cover fit sealing, start blender and carry out batch mixing;
(5) charging: by 1.4～1.6gcm -3packing density batch mixing is packed in steel pipe;
(6) dry material: charged steel pipe, oven dry at 110～120 ℃ of temperature, drying time is 2～2.5 hours, purpose is the moisture of removing wherein;
(7) igniting: the steel pipe that will dry after expecting is placed on jig, with transformer, to tungsten filament, is energized to 20-25V, lights surperficial thermite, and thermite reaction is carried out from top to bottom, at steel pipe inner wall, forms one deck Al 2o 3ceramic layer, its thickness is 1～3mm, the metallic iron that reaction generates is discharged from the steel pipe bottom.
2. the preparation method of ceramic-lined composite steel tube according to claim 1, is characterized in that, aluminium powder Al and ferric oxide Fe 2o 3powder particle size is 200 orders.
3. the preparation method of ceramic-lined composite steel tube according to claim 1, is characterized in that, rare earth oxide Y 2o 3or La 2o 3with metal oxide SiO 2the weight part proportioning be 0.5%: 2%.
4. the preparation method of ceramic-lined composite steel tube according to claim 1, it is characterized in that, during batch mixing, the batching mixing time of inserting in steel pipe is 20～30 minutes, and dry removal moisture under 110～120 ℃, the temperature that thermite reaction occurs after igniting is 1100 ℃.
CN 201110280814 2011-09-09 2011-09-09 Manufacturing method for ceramic-lined composite steel pipe Expired - Fee Related CN102505117B (en)

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CN103658658B (en) * 2013-12-12 2016-02-24 中联重科股份有限公司 Concrete conveying equipment, manufacturing method of S pipe of concrete conveying equipment and SHS reactant
CN104006283B (en) * 2014-04-24 2016-08-17 东北大学 One fills out core steel pipe/fill out core reinforcing bar and preparation method thereof
CN104328429B (en) * 2014-10-10 2016-06-22 中北大学 Utilize the method and apparatus that electromagnetic force and mechanical pressure are coated with lined ceramics at steel pipe inner wall
CN106587973A (en) * 2016-12-14 2017-04-26 沧州渤洋管道集团有限公司 Production method of self-propagating ceramic-steel composite pipes
CN112573904A (en) * 2020-12-25 2021-03-30 西安建筑科技大学 Based on Al2O3-SiO2-ZrO2Steel pipe with ceramic lining and preparation method thereof

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KR20020060689A (en) * 2000-07-24 2002-07-18 야마오카 요지로 Steel pipe with composite material coating and method for manufacturing the same
CN100345796C (en) * 2006-04-18 2007-10-31 南京金陶耐磨管道有限公司 Method for preparing thin-wall composite steel pipe with ceramic lining
CN100482861C (en) * 2006-09-08 2009-04-29 鞍山科技大学 Manufacture method of ceramic lining composite square steel tube
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