CN1111291A - Technology for making corrosion and heat resistant steel lined composite steel pipe - Google Patents
Technology for making corrosion and heat resistant steel lined composite steel pipe Download PDFInfo
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- CN1111291A CN1111291A CN 94104459 CN94104459A CN1111291A CN 1111291 A CN1111291 A CN 1111291A CN 94104459 CN94104459 CN 94104459 CN 94104459 A CN94104459 A CN 94104459A CN 1111291 A CN1111291 A CN 1111291A
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- steel
- steel pipe
- composite
- stainless steel
- high temperature
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Abstract
The said manufacture technology features its thermite-centrifugation process. To Fe2O3+Al material, the oxides of Cr, Ni, W, Ti, etc. are added and the heat thermite reaction produces melts reduced Fe, Cr, N2 and other metal and by-product Al2O3. Molten metals form different-type stainless steel or heat-resisting steel, which combines with other layer steel to form composite steel tube with a combining strength being greater than 25 Kgf/sq.mm. The Cr18Ni9 type stainless steel layer has a corrosion speed in 10% H2SO4 and 10% HCl solution being 4.4g/sq.m. hr and 3.5g/sq.m. hr separately.
Description
The invention belongs to the composite steel tube manufacturing technology.
The corrosionproof heatproof steel pipe is widely used in departments such as chemical industry, petrochemical industry, metallurgy, light industry.But under many occasions, the corrodibility of delivery medium is not strong, does not need to use whole stainless steel tube.Require heat-stable occasion at some, also do not need to use whole heat resisting pipe.Use the stainless steel lined composite steel tube, or the heat resistant steel lined composite steel pipe just can reduce cost greatly.
The traditional method of making the composite steel tube of stainless steel lined or high temperature steel liner has two kinds.A kind of method is, the method that adopts machinery with pipe and carbon steel (or low alloy steel) outer tube group in the stainless steel (or high temperature steel) altogether And be thermally processed into multiple-unit tube.The shortcoming of this composite steel tube is, the degree of eccentricity of pipe is big, lacks metallurgical binding between two pipes, and bonding strength is low, and medium easily infiltrates therebetween.Another kind method is to adopt rotary casting manufactured composite steel tube.Its shortcoming is that the long distance of element spreads between the inner and outer pipes, has damaged the physical strength of stainless solidity to corrosion and outer tube.
Aluminothermic-centrifugalization has been applied to the manufacturing (for example, Japanese Patent J58047550 and Chinese patent CN 1059376A) of ceramic-lined steel pipe.The objective of the invention is to adopt aluminothermic-centrifugalization to make the composite steel tube of corrosionproof heatproof Steel Lining, reduce the cost of multiple-unit tube, increase the kind and the use range of multiple-unit tube.
Basic design of the present invention is, utilizes the oxide compound of metals such as thermite process reduced iron, chromium, nickel, and the high temperature that thermopositive reaction produces makes fusings such as resultant iron, chromium, nickel and aluminum oxide, and simultaneously, metals such as iron form stainless steel (or high temperature steel).Under action of centrifugal force, the stainless steel that proportion is bigger (or high temperature steel) and outer female duct ligation synthesize composite steel tube.The aluminum oxide that proportion is lighter then floats over the internal surface of steel pipe.Remove the oxide compound slag blanket, just obtain the composite steel tube of stainless steel (or high temperature steel) liner.Principal reaction is as follows:
The key of making the corrosionproof heatproof steel pipe is how to obtain to meet the steel layer of stainless steel or high temperature steel composition.Al very easily dissolves among the Fe.Excessive AL content in the steel, the processibility of infringement steel.Because the difficult reduction of the oxide compound of Cr is fully, the amount of owing of Cr content in the steel, the corrosionproof heatproof of reduction steel.Thinking of the present invention is that raising combustion reaction temperature and high-temperature residence time carry out fully reaction, thereby reduce the Al content of steel, improve Cr content.Simultaneously, the add-on of Al reduces 5～25% than stoichiometry in batching, has reduced the Al content in the steel effectively.
The detailed description of the invention is as follows.
1.Fe
2O
3With Al be the principal reaction material, press reaction formula Fe
2O
3+ Al → Fe+Al
2O
3+ Q forms the Fe matrix.Q is an exothermic heat of reaction, and generation high temperature makes and generates into the thing fusing.In above-mentioned reaction mass, add NiO and Cr simultaneously
2O
3(or CrO
3, ferrochrome) and reductive agent Al, by the Ni that thermite reaction generates, Cr dissolves among the Fe, forms stainless steel.If in material, add WO again
3, TiO
2Deng, then can form high temperature steel.Under centrifugal action, fusion stainless steel and outer female duct ligation synthesize composite steel tube, and fusion Al
2O
3Form slag blanket Deng then floating over steel pipe internal-surface.
2. reaction mass is preheated to 100～450 ℃, has improved combustion reaction temperature and high-temperature residence time, and reaction is carried out fully, thereby reduces Al content in the steel, improves Cr content, and the composition of steel is met the requirements.The method of preheating can be selected from following two kinds of methods: in female steel pipe of 1. packing into after the material preheating; 2. the preheating together of female steel pipe band material.
3. the add-on of Al in the reaction mass is than the stoichiometry amount of owing 5～25%.
4. centrifugal force is selected between 50～300G.G is a universal gravity constant.
The invention has the advantages that the composite steel tube that to make dissimilar stainless steels and high temperature steel liner.Composite steel tube two interlayer bonding strengths are greater than 25kgf/mm
2Composite steel tube has good corrosionproof heatproof.The cost of composite steel tube is cheaper than conventional composite steel pipe and whole stainless steel, heat resisting pipe, has wide range of applications.
Example 1:
Female pipe is 20 carbon steel pipes, external diameter φ 76mm, wall thickness 4mm, long 1 meter.Pack in female pipe through the material of mixing and 100 ℃ of preheatings: 1900 gram Fe
2O
3, 300 gram CrO
3, 300 gram Cr
2O
3, 140 gram NiO and 740 gram Al powder.The steel pipe clamping starts whizzer on whizzer, rotating speed borrows tungsten filament to light reaction mass for 1800 rev/mins.High-temp combustion reaction under centrifugal force, molten product stainless steel layer and carbon steel outer tube are combined into composite steel tube, and float over the Al of steel pipe internal-surface
2O
3Be removed Deng the oxide compound slag blanket.The about 1.2mm of stainless steel bed thickness of the multiple-unit tube that obtains, its composition is (%): Cr17.6, Ni7.1, All.4, C＜0.01, surplus is Fe.The bonding strength of composite steel tube (shearing resistance) is greater than 25kgf/mm
2Stainless steel layer hardness HRB94-106 is at 10%H
2SO
4With (20 ℃) among the 10%HCl, corrosion speed is respectively 18.9g/m
2H and 13.1g/m
2H.Microstructure is seen Fig. 1.
Example 2:
1750 gram Fe
2O
3, 600 gram Cr
2O
3, 400 gram ferrochrome (containing Cr65%), 210 gram NiO and 800 gram Al powder, through mixing and 350 ℃ of preheatings, the steel pipe Zhong ， And of the example of packing into 1 makes the composite steel tube of stainless steel lined by example 1.The about 1.4mm of stainless steel bed thickness, composition are (%): Cr18.2, Ni8.3, and Al0.3, C＜0.01, surplus is Fe.The bonding strength of clad steel is greater than 25kgf/mm
2At 10%H
2SO
4With (20 ℃) among the 10%HCl, corrosion speed is respectively 4.4g/m
2H and 3.5g/m
2H.Microstructure is seen Fig. 2.
Example 3:
1750 gram Fe
2O
3, 600 gram Cr
2O
3, 560 gram ferrochrome (containing Cr65%), 210 gram NiO and 800 gram Al powder, through mixing and 450 ℃ of preheatings, the steel pipe Zhong ， And of the example of packing into 1 makes the composite steel tube of stainless steel lined by example 1.The about 1.5mm of stainless steel bed thickness, composition are (%): Cr24.4, Ni8.4, and Al0.1, C＜0.01, surplus is Fe.At 10%H
2SO
4In (20 ℃), corrosion speed is 0.04g/m
2H.
Example 4:
1120 gram Fe
2O
3, 540 gram Cr
2O
3, 140 gram NiO, 140 gram WO
3, 100 gram TiO
2, 60 gram ferrochrome (containing Cr65%) and 810 restrain the Al powder through mixing and 300 ℃ of preheatings, in the 15CrMo heat resisting pipe of packing into, and external diameter φ 89mm, wall thickness 6mm, long 1m make the composite steel tube of high temperature steel liner by example 1.The about 1.0mm of high temperature steel bed thickness, composition are (%): Cr14.1, Ni37.2, and W5.5, Ti2.9, Al1.6, C＜0.01, surplus is Fe.
Further specify below in conjunction with accompanying drawing.
Fig. 1 is the SEM photo of example 1 stainless steel lined composite steel tube, and the left side is a carbon steel for the stainless steel right side, and the middle layer is a transition layer, and about 200 μ m are thick.The distribution curve of Cr, Ni and Al among the figure.The content of element descends from the stainless steel to the carbon steel gradually.The transition layer of stainless steel and carbon steel is tangible metallurgical binding.It mainly is austenite that stainless steel is organized, and contains the part perlite.Transition layer is organized as equiax crystal.Stainless steel is organized as column crystal.
Fig. 2 is the distribution curve of the microstructure of example 2 and Cr, Ni, Al element.About 60 μ m are thick for transition layer.Stainless steel layer is an austenite structure.
Claims (4)
1, a kind of composite steel tube manufacturing technology of corrosionproof heatproof Steel Lining is characterized in that adopting aluminothermic-centrifugalization, at reaction mass Fe
2O
3Among+the Al, add the oxide compound (also can adding with the form of iron alloy) of chromium, nickel, tungsten, titanium etc., the high temperature that utilizes thermite reaction to produce is with metal and by product Al such as the iron that restores, chromium, nickel
2O
3Fusing, molten metal forms precipitation hardenable, Austenitic, austenite-ferrite type stainless steel or high temperature steel, and under action of centrifugal force, stainless steel or high temperature steel and outer female steel pipe are combined into composite steel tube.
2, the composite steel tube manufacturing technology of corrosionproof heatproof Steel Lining according to claim 1 is characterized in that reaction mass 100～450 ℃ of preheatings, in female steel pipe of packing into after the material preheating or the preheating together of female steel pipe band reaction mass.
3, technology for making corrosion and heat resistant steel lined composite steel pipe according to claim 1 and 2 is characterized in that, in the reaction mass, the add-on of Al is than the stoichiometry amount of owing 5～25%.
4, by claim 1 or 2 described technology for making corrosion and heat resistant steel lined composite steel pipe, it is characterized in that centrifugal force selects between 50～300G, G is a universal gravity constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94104459A CN1049254C (en) | 1994-05-06 | 1994-05-06 | Technology for making corrosion and heat resistant steel lined composite steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94104459A CN1049254C (en) | 1994-05-06 | 1994-05-06 | Technology for making corrosion and heat resistant steel lined composite steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1111291A true CN1111291A (en) | 1995-11-08 |
| CN1049254C CN1049254C (en) | 2000-02-09 |
Family
ID=5031598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94104459A Expired - Fee Related CN1049254C (en) | 1994-05-06 | 1994-05-06 | Technology for making corrosion and heat resistant steel lined composite steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1049254C (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317425C (en) * | 2005-11-07 | 2007-05-23 | 北京科技大学 | Production process of composite steel pipe with cermet lining |
| CN1329345C (en) * | 2005-11-10 | 2007-08-01 | 北京科技大学 | Additive used for preparing ceramic lining steel pipe by self straggle high temperature synthesis |
| CN1978095B (en) * | 2005-12-02 | 2010-04-21 | 东芝机械株式会社 | Melt supply pipe for aluminum die casting and method for producing the same |
| CN102086023A (en) * | 2009-12-08 | 2011-06-08 | 北京航空航天大学 | In-situ synthesis method combining sol-gel with thermit reaction and FeNiCrTi/NiAl-Al2O3 nano composite material synthesized by method |
| CN102747315A (en) * | 2012-04-16 | 2012-10-24 | 湖南大学 | Technology for repairing roll by high-temperature molten-steel spray deposition based on thermit reaction |
| CN102817030A (en) * | 2012-09-06 | 2012-12-12 | 南通大学 | Method for preparing a metal/ceramic wear-resisting composite lining plate by means of self-propagating high-temperature synthesis |
| CN103557377A (en) * | 2013-11-06 | 2014-02-05 | 周小新 | Method for preparing ceramic-lined composite stainless steel tube |
| CN104024459A (en) * | 2011-12-27 | 2014-09-03 | 株式会社神户制钢所 | Heat-resistant austenitic stainless steel highly inhibited from releasing scale, and stainless-steel pipe |
| CN106048598A (en) * | 2016-06-29 | 2016-10-26 | 巢湖鹏远金属焊管有限公司 | Method for enhancing strength of metal welded pipes |
| CN106122680A (en) * | 2016-06-29 | 2016-11-16 | 巢湖鹏远金属焊管有限公司 | A kind of high-strength corrosion-resisting straight welded pipe |
| CN109047700A (en) * | 2018-07-19 | 2018-12-21 | 柳州市创科复合金属陶瓷制品有限公司 | A kind of compound body of roll production method of bimetallic |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5934469B2 (en) * | 1981-09-12 | 1984-08-22 | 工業技術院長 | Manufacturing method of composite structure pipe |
| CN1029352C (en) * | 1990-09-01 | 1995-07-19 | 北京科技大学 | Manufacturing technique of corrosion-proof wear-ressistant ceramic-lined steel pipe |
-
1994
- 1994-05-06 CN CN94104459A patent/CN1049254C/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317425C (en) * | 2005-11-07 | 2007-05-23 | 北京科技大学 | Production process of composite steel pipe with cermet lining |
| CN1329345C (en) * | 2005-11-10 | 2007-08-01 | 北京科技大学 | Additive used for preparing ceramic lining steel pipe by self straggle high temperature synthesis |
| CN1978095B (en) * | 2005-12-02 | 2010-04-21 | 东芝机械株式会社 | Melt supply pipe for aluminum die casting and method for producing the same |
| CN102086023B (en) * | 2009-12-08 | 2014-01-29 | 北京航空航天大学 | In-situ synthesis method combining sol-gel with thermit reaction and FeNiCrTi/NiAl-Al2O3 nano composite material synthesized by method |
| CN102086023A (en) * | 2009-12-08 | 2011-06-08 | 北京航空航天大学 | In-situ synthesis method combining sol-gel with thermit reaction and FeNiCrTi/NiAl-Al2O3 nano composite material synthesized by method |
| WO2011069443A1 (en) * | 2009-12-08 | 2011-06-16 | 北京航空航天大学 | In situ preparation method of sol-gel combining with thermite reaction and fenicrti/nial-a12o3 nano-composite material prepared therefrom |
| CN104024459B (en) * | 2011-12-27 | 2016-06-01 | 株式会社神户制钢所 | The heat-resisting austenite stainless steel of anti-oxidant skin separability excellence and stainless steel tube |
| CN104024459A (en) * | 2011-12-27 | 2014-09-03 | 株式会社神户制钢所 | Heat-resistant austenitic stainless steel highly inhibited from releasing scale, and stainless-steel pipe |
| CN102747315B (en) * | 2012-04-16 | 2014-06-04 | 湖南大学 | Technology for repairing roll by high-temperature molten-steel spray deposition based on thermit reaction |
| CN102747315A (en) * | 2012-04-16 | 2012-10-24 | 湖南大学 | Technology for repairing roll by high-temperature molten-steel spray deposition based on thermit reaction |
| CN102817030A (en) * | 2012-09-06 | 2012-12-12 | 南通大学 | Method for preparing a metal/ceramic wear-resisting composite lining plate by means of self-propagating high-temperature synthesis |
| CN103557377A (en) * | 2013-11-06 | 2014-02-05 | 周小新 | Method for preparing ceramic-lined composite stainless steel tube |
| CN103557377B (en) * | 2013-11-06 | 2015-09-09 | 周小新 | The preparation method of ceramic-lined composite stainless steel pipe |
| CN106048598A (en) * | 2016-06-29 | 2016-10-26 | 巢湖鹏远金属焊管有限公司 | Method for enhancing strength of metal welded pipes |
| CN106122680A (en) * | 2016-06-29 | 2016-11-16 | 巢湖鹏远金属焊管有限公司 | A kind of high-strength corrosion-resisting straight welded pipe |
| CN109047700A (en) * | 2018-07-19 | 2018-12-21 | 柳州市创科复合金属陶瓷制品有限公司 | A kind of compound body of roll production method of bimetallic |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1049254C (en) | 2000-02-09 |
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