CN102899663A - Method of preparing metal coating on inner surface of steel pipe through SHS (Self-propagation High-temperature Synthesis) centrifugal method - Google Patents
Method of preparing metal coating on inner surface of steel pipe through SHS (Self-propagation High-temperature Synthesis) centrifugal method Download PDFInfo
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- CN102899663A CN102899663A CN2012104214759A CN201210421475A CN102899663A CN 102899663 A CN102899663 A CN 102899663A CN 2012104214759 A CN2012104214759 A CN 2012104214759A CN 201210421475 A CN201210421475 A CN 201210421475A CN 102899663 A CN102899663 A CN 102899663A
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Abstract
The invention relates to a method of preparing a metal coating on an inner surface of a steel pipe through an SHS (Self-propagation High-temperature Synthesis) centrifugal method. The method comprises the following technical processes: an aluminum welding agent, and alloy and non-alloy elements are placed in the steel pipe, after ignition, the self-propagation reaction is carried out according to the following formula: Fe2O3+alloy and non-alloy elements+2Al=2Fe+alloy and non-alloy elements+Al2O3. Under high-temperature exothermic reaction, reaction products iron and alumina, and the added alloy and non-alloy elements are in molten condition, the iron and the alloy and non-alloy elements are soluble to form an ally, a motor drives the steel pipe to rotate at high speed, under the action of centrifugal force, the alloy with large density in the reaction products in the steel pipe is taken as a transition layer to form metallurgical bonding along with the steel pipe, the alumina with low density is distributed on the inner surface of the steel pipe, after cooling, the ceramic lining steel pipe is obtained, after the ceramic coating is knocked off by a hammer, the alloy coating is obtained on the inner surface of the steel pipe. The method, provided by the invention, has the advantages of simple process, cheap raw materials, adjustable coating material prescription, excellent performance, and the like.
Description
Technical field
The invention provides a kind of SHS(self propagating high temperature synthetic) centrifuging prepares the method for steel pipe internal-surface metallic coating.Belong to technical field of surface coating.
Background technology
During defense and commercial industry is produced, carry the media such as high temperature, burn into wearing and tearing through pipeline commonly used.Often require inner-walls of duct to have good high-temperature behavior, wear resistance and erosion resistance etc.Prepare the property coating at steel pipe internal-surface, but than make tubing decrease cost with integral material.Present coating lined steel pipe preparation method is mainly containing of comparative maturity: cover structure method, centrifugal casting method, bimetal centrifugal casting, composite plate weld method, SHS centrifuging and static SHS method etc.SHS centrifuging good product performance wherein, cost is low, is widely used.But the method only is used for preparing ceramic-lined steel pipe at present, and be difficult to satisfy as gun tube etc. requires to prepare in the steel pipe the good while of high-temperature behavior again the requirement of fine flexible coating.
Summary of the invention
The object of the invention is to overcome the deficiency of ceramic-lined steel pipe coating poor toughness, provide a kind of SHS centrifuging to prepare the method for steel pipe internal-surface metallic coating.
The object of the present invention is achieved like this: a kind of SHS centrifuging prepares the method for steel pipe internal-surface metallic coating, and described method comprises following technological process: the in-built aluminum heat flux of steel pipe and alloy and non-alloying element, light rear by following formula generation self-propagating reaction:
Fe
2O
3+ alloy and non-alloying element+2Al=2Fe+ alloy and non-alloying element+Al
2O
3
Under the high temperature thermopositive reaction, the alloy of reaction product iron, aluminum oxide and adding and non-alloying element all are molten state, iron and alloy and the non-alloying element formation alloy that dissolves each other, (1400 ~ 1600r/min) rotations of driven by motor High-speed Steel Tube, under centrifugal action, in the steel pipe reaction product, the alloy that density is large forms metallurgical binding as transition layer and steel pipe, low-density aluminum oxide is distributed in steel pipe internal-surface, obtain ceramic-lined steel pipe after the cooling, after knocking out ceramic coating with iron hammer, obtain alloy coat at steel pipe internal-surface.
The invention has the beneficial effects as follows:
It is simple that the inventive method has technique, and raw material is cheap, and the coated material prescription is adjustable, the advantages such as excellent property.
Embodiment
The present invention relates to the method that a kind of SHS centrifuging prepares the steel pipe internal-surface metallic coating, described method comprises following technological process:
The in-built aluminum heat flux of steel pipe and alloy and non-alloying element, light rear by following formula generation self-propagating reaction:
Fe
2O
3+ alloy and non-alloying element+2Al=2Fe+ alloy and non-alloying element+Al
2O
3
Under the high temperature thermopositive reaction, the alloy of reaction product iron, aluminum oxide and adding and non-alloying element all are molten state.Iron and alloy and the non-alloying element formation alloy that dissolves each other.(1400 ~ 1600r/min) rotations of driven by motor High-speed Steel Tube, under centrifugal action, in the inner reaction tube product, the alloy that density is large forms metallurgical binding as transition layer and steel pipe, low-density aluminum oxide is distributed in steel pipe internal-surface, obtains ceramic-lined steel pipe after the cooling.After knocking out ceramic coating with iron hammer, obtain alloy coat at steel pipe internal-surface.By changing the composition of alloy, can obtain at steel pipe internal-surface the alloy coat of different performance, to satisfy the requirement of different use propertieies.For obtaining the graded alloy coating, can change the alloy ratio that adds in the aluminum heat flux, repeat above-mentioned centrifugal process.
Embodiment:
Fill aluminum heat flux and alloy and non-alloying element in the steel pipe, light rear by following formula generation self-propagating reaction:
Fe
2O
3+Gr+C+2Al=2Fe+Gr+C+Al
2O
3
The Fe of molten state and Gr and C dissolve each other to form and contain the Gr steel alloy in the steel pipe.(1400 ~ 1600r/min) rotations of driven by motor High-speed Steel Tube, under centrifugal action, in the steel pipe reaction product, the Gr steel alloy that contains that density is large forms metallurgical binding as transition layer and steel pipe, low-density aluminum oxide is distributed in steel pipe internal-surface, obtains ceramic-lined steel pipe after the cooling.After knocking out ceramic coating with iron hammer, obtain containing the Gr alloy coat at steel pipe internal-surface.
Claims (2)
1. a SHS centrifuging prepares the method for steel pipe internal-surface metallic coating, and it is characterized in that: described method comprises following technological process: the in-built aluminum heat flux of steel pipe and alloy and non-alloying element, after lighting by following formula generation self-propagating reaction:
Fe
2O
3+ alloy and non-alloying element+2Al=2Fe+ alloy and non-alloying element+Al
2O
3
Under the high temperature thermopositive reaction, the alloy of reaction product iron, aluminum oxide and adding and non-alloying element all are molten state, iron and alloy and the non-alloying element formation alloy that dissolves each other, the rotation of driven by motor High-speed Steel Tube, under centrifugal action, in the steel pipe reaction product, the alloy that density is large forms metallurgical binding as transition layer and steel pipe, low-density aluminum oxide is distributed in steel pipe internal-surface, obtain ceramic-lined steel pipe after the cooling, after knocking out ceramic coating with iron hammer, obtain alloy coat at steel pipe internal-surface.
2. a kind of SHS centrifuging according to claim 1 prepares the method for steel pipe internal-surface metallic coating, it is characterized in that: change the alloy ratio that adds in the aluminum heat flux, repeat above-mentioned centrifugal process, obtain the graded alloy coating.
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104046978A (en) * | 2014-05-29 | 2014-09-17 | 仲玥 | Method for preparing coating layer of steel pipe inner surface by SHS ultrasonic emulsification centrifugal method |
CN104328429A (en) * | 2014-10-10 | 2015-02-04 | 中北大学 | Method and device for coating inner wall of steel pipe with inner lining ceramic by using electromagnetic force and mechanical pressure |
CN105478786A (en) * | 2015-11-26 | 2016-04-13 | 中国石油天然气股份有限公司 | Is suitable for CO2Processing technology of driven ceramic coating air-proof oil well pump cylinder |
CN105834355A (en) * | 2016-06-12 | 2016-08-10 | 安徽工程大学 | Self-heating high-temperature coating |
CN108746638A (en) * | 2018-05-30 | 2018-11-06 | 安徽工程大学 | A kind of the SHS metallurgical powder and its application method multiple for 30CrMo steel pipe die repairs |
CN108746639A (en) * | 2018-05-30 | 2018-11-06 | 安徽工程大学 | A kind of the SHS metallurgical powder and its application method multiple for H13 steel pipe die repairs |
CN113891959A (en) * | 2019-05-28 | 2022-01-04 | 先进材料解决方案私人有限公司 | Method for producing corrosion-resistant alloy-clad metal pipe |
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US4363832A (en) * | 1980-01-16 | 1982-12-14 | Director-General Of The Agency Of Industrial Science & Technology | Method for providing ceramic lining to a hollow body by thermit reaction |
CN1772710A (en) * | 2005-11-07 | 2006-05-17 | 北京科技大学 | Production process of composite steel pipe with cermet lining |
CN101898246A (en) * | 2010-07-19 | 2010-12-01 | 北京科技大学 | Method for preparing SHS ceramic liner metal tube from iron-based wastes |
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2012
- 2012-10-30 CN CN2012104214759A patent/CN102899663A/en active Pending
Patent Citations (3)
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US4363832A (en) * | 1980-01-16 | 1982-12-14 | Director-General Of The Agency Of Industrial Science & Technology | Method for providing ceramic lining to a hollow body by thermit reaction |
CN1772710A (en) * | 2005-11-07 | 2006-05-17 | 北京科技大学 | Production process of composite steel pipe with cermet lining |
CN101898246A (en) * | 2010-07-19 | 2010-12-01 | 北京科技大学 | Method for preparing SHS ceramic liner metal tube from iron-based wastes |
Non-Patent Citations (1)
Title |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104046978A (en) * | 2014-05-29 | 2014-09-17 | 仲玥 | Method for preparing coating layer of steel pipe inner surface by SHS ultrasonic emulsification centrifugal method |
CN104328429A (en) * | 2014-10-10 | 2015-02-04 | 中北大学 | Method and device for coating inner wall of steel pipe with inner lining ceramic by using electromagnetic force and mechanical pressure |
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 |
CN105478786A (en) * | 2015-11-26 | 2016-04-13 | 中国石油天然气股份有限公司 | Is suitable for CO2Processing technology of driven ceramic coating air-proof oil well pump cylinder |
CN105834355A (en) * | 2016-06-12 | 2016-08-10 | 安徽工程大学 | Self-heating high-temperature coating |
CN108746638A (en) * | 2018-05-30 | 2018-11-06 | 安徽工程大学 | A kind of the SHS metallurgical powder and its application method multiple for 30CrMo steel pipe die repairs |
CN108746639A (en) * | 2018-05-30 | 2018-11-06 | 安徽工程大学 | A kind of the SHS metallurgical powder and its application method multiple for H13 steel pipe die repairs |
CN113891959A (en) * | 2019-05-28 | 2022-01-04 | 先进材料解决方案私人有限公司 | Method for producing corrosion-resistant alloy-clad metal pipe |
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