CN111560566A - Corrosion-resistant alloy material and desulfurization pipe fitting based on same - Google Patents
Corrosion-resistant alloy material and desulfurization pipe fitting based on same Download PDFInfo
- Publication number
- CN111560566A CN111560566A CN202010420157.5A CN202010420157A CN111560566A CN 111560566 A CN111560566 A CN 111560566A CN 202010420157 A CN202010420157 A CN 202010420157A CN 111560566 A CN111560566 A CN 111560566A
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- CN
- China
- Prior art keywords
- corrosion
- desulfurization
- pipeline
- alloy material
- pipe fitting
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/02—Branch units, e.g. made in one piece, welded, riveted
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
Abstract
The invention belongs to the field of environmental protection, relates to the field of pipelines, and particularly relates to a corrosion-resistant alloy material and a desulfurization pipeline part based on the corrosion-resistant alloy material, wherein the corrosion-resistant alloy material is prepared by taking chromium-nickel alloy as a base and molybdenum, copper, niobium, nitrogen and rare earth as doping elements through alloying casting; the desulfurization pipeline pipe fitting comprises a pipeline shell, wherein a corrosion-resistant lining is arranged in the pipeline shell, and the corrosion-resistant lining is made of corrosion-resistant alloy materials. The invention solves the problem of poor corrosion resistance of the existing pipeline, and utilizes a metal doping mode to be matched with the chromium-nickel alloy to form a corrosion resistance system, thereby not only effectively improving the corrosion resistance, but also improving the toughness and the heat resistance.
Description
Technical Field
The invention belongs to the field of environmental protection, relates to the field of pipelines, and particularly relates to a corrosion-resistant alloy material and a desulfurization pipeline piece based on the corrosion-resistant alloy material.
Background
The desulfurization pipeline is generally used for transporting solid or liquid media with stronger corrosivity, and has higher requirements on corrosion resistance so as to prevent the leakage of desulfurization wastewater and the pollution to the atmosphere. Traditional desulfurization pipeline adopts the rubber lined pipeline, and along with live time's extension, ageing phenomenon easily appears in the offset plate in the desulfurization pipeline, sets up anticorrosive material and takes place to drop, leads to the direct pipeline body corrosion of sulphur waste water, greatly reduced the life of pipeline, cause the pipeline to reveal phenomenons such as even, seriously influence auxiliary assembly and all ring edge borders. More seriously, the colloid in the rubber lining pipeline is aged, falls off and scales to block the slurry pipeline, so that the whole pipeline is blocked.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a corrosion-resistant alloy material, which solves the problem of poor corrosion resistance of the existing pipeline, and a corrosion-resistant system is formed by matching a metal doping mode with a chromium-nickel alloy, so that not only is the corrosion resistance effectively improved, but also the toughness and the heat resistance are improved.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
the corrosion-resistant alloy material is made up by using chrome-nickel alloy as base material and using molybdenum, copper, niobium, nitrogen and rare earth as doping elements through the processes of alloying and casting.
The corrosion-resistant alloy material comprises 0.02-0.07% of C, 12-25% of Cr, 4-25% of Ni, 1-1.5% of Cu, 3-6% of Mo, 0.5-0.8% of Nb, 1.0-1.2% of Mn, 0.2-0.3% of N, 0.02-0.06% of Re and the balance of iron.
The corrosion-resistant alloy material is one of ZG00Cr25Ni7Mo4NRe, ZG00Cr22Ni6Mo3NRe, ZG00Cr20Ni5Mo3NRe, ZG00Cr25Ni20NbRe, ZG00Cr20Ni25Mo4.5Cu and ZG00Cr20Ni25Mo6 CuN.
The utility model provides a desulfurization pipeline pipe fitting, includes the pipe casing, be equipped with corrosion-resistant inside lining in the pipe casing, corrosion-resistant inside lining adopts corrosion-resistant alloy material.
The pipeline shell and the corrosion-resistant lining of the desulfurization pipeline pipe fitting are integrally cast.
The pipeline shell is in various shapes and comprises a straight pipe, a reducer pipe, an elbow pipe and a tee joint.
The desulfurization pipeline pipe fittings are connected through flanges or in a welding mode.
The Cr content is 12-25% to promote the contradictory movement in the alloy to resist corrosion damage.
Nickel Ni is an excellent corrosion resistant material, enabling the corrosion resistance in certain media to be significantly altered, with a content of 5-25% being chosen.
The molybdenum Mo can improve the chloride corrosion resistance of the stainless steel, and the pitting corrosion resistance and the crevice corrosion resistance of the Mo in a chloride environment are 3 times of those of the Cr; mo is a ferrite-forming element which likewise promotes the formation of intermetallic phases, with a content of 3 to 6% being chosen.
Copper Cu can improve the corrosion resistance, and the selection content is 1-1.5%.
Niobium Nb, which can increase the affinity of chromium and carbon, is selected in an amount of 0.3-0.5%.
The Mn-Mn alloy contains 1.0-1.2% of Mn, has strong deoxidizing and desulfurizing capacity, can eliminate or reduce the hot brittleness caused by oxygen and sulfur, enhances the corrosion resistance and the heat resistance, solves the problems of easy aging and easy scaling, and prolongs the service life. Greatly improves the hot working performance of the steel and can improve the strength and the hardness of the steel at the same time.
Nitrogen N, which increases the pitting corrosion resistance and crevice corrosion resistance of austenitic and duplex stainless steels, and can significantly improve the strength of the steel, is one of the most effective elements for solid solution strengthening.
The rare earth Re refines the crystal grains, can enhance the heat resistance, and can enhance the heat resistance of the whole body by selecting 0.02-0.06 percent.
From the above description, it can be seen that the present invention has the following advantages:
1. the invention solves the problem of poor corrosion resistance of the existing pipeline, and utilizes a metal doping mode to be matched with the chromium-nickel alloy to form a corrosion resistance system, thereby not only effectively improving the corrosion resistance, but also improving the toughness and the heat resistance.
2. The invention utilizes the corrosion-resistant alloy material as the lining material to form the corrosion-resistant desulfurization pipe fitting, thereby prolonging the service life of the whole body.
Detailed Description
The present invention is described in detail with reference to examples, but the present invention is not limited to the claims.
Example 1
A straight desulfurization pipe takes a stainless steel pipe as a pipe shell, an internal corrosion alloy material as a lining alloy layer, the shell and the lining alloy layer are integrally and compositely cast, the nominal diameter of the desulfurization pipe is 200mm, and the wall thickness of the shell is 6 mm; the thickness of the lining alloy layer is 10 mm;
the inner corrosion alloy material of the straight desulfurization pipe is ZG00Cr20Ni5Mo3NRe, specifically, C is 0.02%, Cr is 20%, Ni is 5%, Mo is 3%, N is 0.2%, Re is 0.02%, and the balance is iron;
and the two ends of the desulfurization straight pipe are connected through the interface flanges.
The desulfurization straight pipe is used for desulfurizing limestone medium.
The straight desulfurization pipe is directly used as an anti-corrosion pipeline for desulfurization limestone medium circulation, the on-site connection is convenient, compared with a commercially available anti-corrosion pipeline (rubber-lined pipeline), the service life is prolonged by 2.5 times, and the problems of scaling, blockage and the like on the surface are avoided after long-term use.
Example 2
A desulfurization elbow fitting takes stainless steel as a pipeline shell, ZG00Cr22Ni6Mo3NRe as a lining alloy layer, and the shell and the lining alloy layer are integrally cast in a composite mode; the drift diameter of the desulfurization bent pipe fitting is 350mm, and the wall thickness of the shell is 8 mm; the thickness of the lining alloy layer is 12 mm;
the lining alloy layer of the desulfurization elbow fitting comprises 0.07 percent of C, 22 percent of Cr, 6 percent of Ni, 3 percent of Mo, 0.2 percent of N, 0.06 percent of Re and the balance of iron;
the two ends of the desulfurization elbow pipe fitting are connected through an interface flange; it is used for desulfurizing and cinder medium.
The bending angle of the desulfurization elbow member may be set to 30 °, 45 °, 60 °, 90 °, or any angle.
The desulfurization elbow pipe fitting is directly used as an anti-corrosion pipeline for desulfurization and ash residue medium circulation, the on-site connection is convenient, compared with a commercially available anti-corrosion pipeline (rubber-lined pipeline), the service life is prolonged by 2.1 times, and the problems of scaling, blockage and the like do not exist on the surface after long-term use.
Example 3
A reducing pipe fitting, stainless steel is taken as a pipeline shell, ZG00Cr20Ni5Mo3NRe is taken as a lining alloy layer, and the shell and the lining alloy layer are integrally cast in a composite mode; the drift diameter of the reducing pipe fitting is 450mm, and the wall thickness of the shell is 8 mm; the thickness of the lining alloy layer is 16 mm;
the lining alloy layer of the reducing pipe fitting comprises 0.02% of C, 20% of Cr, 5% of Ni, 3% of Mo, 0.2% of N, 0.05% of Re and the balance of iron;
the two sides of the reducing pipe fitting are both provided with interface flanges, the reducing pipe is eccentric, and one end of each interface flange can be a loose flange;
the reducing pipe fitting is used for desulfurizing limestone medium.
The reducing pipe fitting is directly used as an anti-corrosion pipeline for desulfurization limestone medium circulation, the field connection is convenient, compared with a commercially available anti-corrosion pipeline (rubber-lined pipeline), the service life is prolonged by 2.4 times, and the problems of scaling, blockage and the like do not exist on the surface after long-term use.
Example 4
A three-way pipe fitting is characterized in that stainless steel is used as a pipeline shell, ZG00Cr22Ni6Mo3NRe is used as a lining alloy layer, and the shell and the lining alloy layer are integrally cast in a composite mode; the drift diameter of the three-way pipe fitting is 610mm, and the wall thickness of the shell is 10 mm; the thickness of the lining alloy layer is 25 mm;
the lining alloy layer of the tee pipe fitting comprises 0.07% of C, 22% of Cr, 6% of Ni, 3% of Mo, 0.2% of N, 0.02% of Re and the balance of iron;
the pipe orifices of the three-way pipe fitting are provided with interface flanges;
the three-way pipe fitting is used for desulfurizing and ash slag medium.
The three-way pipe fitting is directly used as an anti-corrosion pipeline for desulfurization and ash residue medium circulation, the on-site connection is convenient, compared with a commercially available anti-corrosion pipeline (rubber-lined pipeline), the service life is prolonged by 2.6 times, and the problems of scaling, blockage and the like do not exist on the surface after long-term use.
In summary, the invention has the following advantages:
1. the invention solves the problem of poor corrosion resistance of the existing pipeline, and utilizes a metal doping mode to be matched with the chromium-nickel alloy to form a corrosion resistance system, thereby not only effectively improving the corrosion resistance, but also improving the toughness and the heat resistance.
2. The invention utilizes the corrosion-resistant alloy material as the lining material to form the corrosion-resistant desulfurization pipe fitting, thereby prolonging the service life of the whole body.
It should be understood that the detailed description of the invention is merely illustrative of the invention and is not intended to limit the invention to the specific embodiments described. It will be appreciated by those skilled in the art that the present invention may be modified or substituted equally as well to achieve the same technical result; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (7)
1. A corrosion-resistant alloy material, characterized by: the alloy is prepared by taking chromium-nickel alloy as a base and molybdenum, copper, niobium, nitrogen and rare earth as doping elements and performing alloying casting.
2. The corrosion-resistant alloy material according to claim 1, wherein the corrosion-resistant alloy material contains 0.02 to 0.07% of C, 12 to 25% of Cr, 4 to 25% of Ni, 1 to 1.5% of Cu, 3 to 6% of Mo, 0.5 to 0.8% of Nb, 1.0 to 1.2% of Mn, 0.2 to 0.3% of N, 0.02 to 0.06% of Re, and the balance of Fe.
3. The corrosion-resistant alloy material according to claim 2, wherein said corrosion-resistant alloy material is one of ZG00Cr25Ni7Mo4NRe, ZG00Cr22Ni6Mo3NRe, ZG00Cr20Ni5Mo3NRe, ZG00Cr25Ni20NbRe, ZG00Cr20Ni25Mo4.5Cu, and ZG00Cr20Ni25Mo6 CuN.
4. A desulfurization pipeline pipe fitting is characterized by comprising a pipeline shell, wherein a corrosion-resistant lining is arranged in the pipeline shell, and the corrosion-resistant lining is made of the corrosion-resistant alloy material according to any one of claims 1 to 3.
5. The desulfurization pipe fitting of claim 4, wherein the pipe shell and the corrosion-resistant lining of the desulfurization pipe fitting are integrally cast.
6. The desulfurization pipe fitting of claim 4, wherein said pipe housing is in a variety of shapes including a straight pipe, a reducer pipe, an elbow pipe, and a tee.
7. The desulfurization pipe fitting of claim 4, wherein the desulfurization pipe fitting is connected by means of a flange or welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420157.5A CN111560566A (en) | 2020-05-18 | 2020-05-18 | Corrosion-resistant alloy material and desulfurization pipe fitting based on same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420157.5A CN111560566A (en) | 2020-05-18 | 2020-05-18 | Corrosion-resistant alloy material and desulfurization pipe fitting based on same |
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| CN111560566A true CN111560566A (en) | 2020-08-21 |
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| CN202010420157.5A Pending CN111560566A (en) | 2020-05-18 | 2020-05-18 | Corrosion-resistant alloy material and desulfurization pipe fitting based on same |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1148635A (en) * | 1995-10-25 | 1997-04-30 | 刘平清 | High corrosion-resisting austenite stainless steel |
| CN101956142A (en) * | 2009-07-13 | 2011-01-26 | 苏州奕欣特钢管业有限公司 | Dual phase steel seamless pipe and processing method thereof |
| CN101981215A (en) * | 2008-03-28 | 2011-02-23 | 住友金属工业株式会社 | Stainless steel for use in oil well tube |
| CN103131961A (en) * | 2013-03-08 | 2013-06-05 | 宣达实业集团有限公司 | Corrosion-resistant stainless steel plate, and preparation method and application thereof |
| CN103710644A (en) * | 2014-01-23 | 2014-04-09 | 江苏银环精密钢管股份有限公司 | Stainless steel seamless steel tube for sulfuric acid waste heat recovery device |
| CN108642409A (en) * | 2018-05-08 | 2018-10-12 | 江苏理工学院 | A kind of corrosion-resistant super austenitic stainless steel and its manufacturing process |
-
2020
- 2020-05-18 CN CN202010420157.5A patent/CN111560566A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1148635A (en) * | 1995-10-25 | 1997-04-30 | 刘平清 | High corrosion-resisting austenite stainless steel |
| CN101981215A (en) * | 2008-03-28 | 2011-02-23 | 住友金属工业株式会社 | Stainless steel for use in oil well tube |
| CN101956142A (en) * | 2009-07-13 | 2011-01-26 | 苏州奕欣特钢管业有限公司 | Dual phase steel seamless pipe and processing method thereof |
| CN103131961A (en) * | 2013-03-08 | 2013-06-05 | 宣达实业集团有限公司 | Corrosion-resistant stainless steel plate, and preparation method and application thereof |
| CN103710644A (en) * | 2014-01-23 | 2014-04-09 | 江苏银环精密钢管股份有限公司 | Stainless steel seamless steel tube for sulfuric acid waste heat recovery device |
| CN108642409A (en) * | 2018-05-08 | 2018-10-12 | 江苏理工学院 | A kind of corrosion-resistant super austenitic stainless steel and its manufacturing process |
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Application publication date: 20200821 |
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