CN111363979A - Electrode bar of long-life electrode boiler and preparation method thereof - Google Patents
Electrode bar of long-life electrode boiler and preparation method thereof Download PDFInfo
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- CN111363979A CN111363979A CN202010162746.8A CN202010162746A CN111363979A CN 111363979 A CN111363979 A CN 111363979A CN 202010162746 A CN202010162746 A CN 202010162746A CN 111363979 A CN111363979 A CN 111363979A
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
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- Physics & Mathematics (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention aims to provide a long-life electrode boiler electrode bar which has strong electrochemical corrosion resistance and obviously prolonged service life and a preparation method thereof. The invention relates to a long-life electrode boiler electrode bar, which comprises the following components in percentage by weight: less than or equal to 0.0015 percent of oxygen, less than or equal to 0.05 percent of carbon, 0.16-0.26 percent of silicon, 0.29-0.40 percent of manganese, less than or equal to 0.018 percent of phosphorus, less than or equal to 0.0015 percent of sulfur, less than or equal to 0.001-0.002 percent of aluminum, the balance of iron, the ferrite structure in the long-life electrode boiler electrode bar is not less than 85 percent, and the surface finish of the long-life electrode boiler electrode bar is more than N5 or N5. The service life of the product can reach more than 10 years, and the electrode rod in the prior art is seriously corroded after being used for three years and needs to be replaced. Therefore, the electrode rod of the long-life electrode boiler has the characteristics of strong electrochemical corrosion resistance and obviously prolonged service life.
Description
Technical Field
The invention relates to a long-life electrode boiler electrode bar and a preparation method thereof.
Background
In recent years, air pollution has received more and more attention, and especially PM2.5 has been a hot point of concern to the public. PM2.5 has 6 important sources, which are soil dust, coal, biomass combustion, automobile exhaust and garbage incineration, industrial pollution and secondary inorganic aerosol respectively. Wherein the proportion of PM2.5 generated by burning coal is about 18 percent, and the method has great influence on the formation of haze weather. Therefore, the state starts to implement the policy of changing coal into electricity, and an electric boiler is used for replacing coal burning, so that the environmental pollution is reduced.
At present, the application range of electric boiler in "coal changes electricity" engineering is wider, and the novel electrode boiler that has developed possesses characteristics such as be afraid of dry combustion method, do not receive high low-voltage influence, do not knot the incrustation scale, it is fast to heat up, the electrothermal conversion rate is high, noiselessness, simple structure is practical, do not receive external environment influence, however the life-span of the electrode bar that this kind of electric boiler used is a big difficult problem that puzzles manufacturing enterprise always, the electrode bar during operation, because there is electrolyte electrochemical reaction, lead to the electrode bar to corrode seriously, but frequent change electrode bar can increase user use cost, influence product quality.
In view of the above problems, there is a need to develop a long-life electrode boiler electrode rod.
Disclosure of Invention
The invention aims to provide a long-life electrode boiler electrode bar which has strong electrochemical corrosion resistance and obviously prolonged service life and a preparation method thereof.
The invention relates to a long-life electrode boiler electrode bar, which comprises the following components in percentage by weight: less than or equal to 0.0015 percent of oxygen, less than or equal to 0.05 percent of carbon, 0.16-0.26 percent of silicon, 0.29-0.40 percent of manganese, less than or equal to 0.018 percent of phosphorus, less than or equal to 0.0015 percent of sulfur, less than or equal to 0.001-0.002 percent of aluminum, the balance of iron, the ferrite structure in the long-life electrode boiler electrode bar is not less than 85 percent, and the surface finish of the long-life electrode boiler electrode bar is more than N5 or N5.
Preferably, the long-life electrode boiler electrode rod comprises the following components in percentage by weight: less than or equal to 0.0010 percent of oxygen, less than or equal to 0.04 percent of carbon, 0.18 to 0.24 percent of silicon, 0.32 to 0.37 percent of manganese, less than or equal to 0.012 percent of phosphorus, less than or equal to 0.0010 percent of sulfur, less than or equal to 0.0012 to 0.0018 percent of aluminum, and the balance of iron.
Preferably, the long-life electrode boiler electrode rod comprises the following components in percentage by weight: less than or equal to 0.0005 percent of oxygen, less than or equal to 0.02 percent of carbon, 0.20 to 0.22 percent of silicon, 0.34 to 0.35 percent of manganese, less than or equal to 0.008 percent of phosphorus, less than or equal to 0.0005 percent of sulfur, less than or equal to 0.0014 to 0.0016 percent of aluminum, and the balance of iron.
The preparation method of the long-life electrode boiler electrode bar comprises the following steps:
A. adopting a converter-LF refining-RH refining-continuous casting process to smelt steel, adopting a nitrogen increasing and separating technology in the smelting process to deeply remove impurities in steel, wherein the obtained steel comprises the following components in percentage by weight: less than or equal to 0.0015 percent of oxygen, less than or equal to 0.05 percent of carbon, 0.16-0.26 percent of silicon, 0.29-0.40 percent of manganese, less than or equal to 0.018 percent of phosphorus, less than or equal to 0.0015 percent of sulfur, less than or equal to 0.001-0.002 percent of aluminum, and the balance of iron;
B. rolling the steel obtained in the step A at the initial rolling temperature of 1150-1200 ℃ and the final rolling temperature of 850-870 ℃ to obtain a wire rod with a ferrite structure of not less than 85 percent;
C. processing the surface of the wire rod obtained in the step B to enable the surface smoothness to be more than N5 or N5;
D. and D, processing the wire rod obtained in the step C into the long-life electrode boiler electrode rod according to requirements.
Preferably, in the step a, the long-life electrode boiler electrode rod comprises the following components in percentage by weight: less than or equal to 0.0010 percent of oxygen, less than or equal to 0.04 percent of carbon, 0.18 to 0.24 percent of silicon, 0.32 to 0.37 percent of manganese, less than or equal to 0.012 percent of phosphorus, less than or equal to 0.0010 percent of sulfur, less than or equal to 0.0012 to 0.0018 percent of aluminum, and the balance of iron.
Preferably, in the step a, the long-life electrode boiler electrode rod comprises the following components in percentage by weight: less than or equal to 0.0005 percent of oxygen, less than or equal to 0.02 percent of carbon, 0.20 to 0.22 percent of silicon, 0.34 to 0.35 percent of manganese, less than or equal to 0.008 percent of phosphorus, less than or equal to 0.0005 percent of sulfur, less than or equal to 0.0014 to 0.0016 percent of aluminum, and the balance of iron.
Preferably, in the step C, the surface of the wire rod is subjected to grinding treatment by sequentially passing through silicon carbide sandpaper of 200 meshes, 600 meshes, 1200 meshes and 1500 meshes, and then polished to obtain the surface of the wire rod with the finish degree of N5 or N5 or more.
The electrode bar of the long-life electrode boiler and the preparation method thereof have the following beneficial effects:
the invention relates to a long-life electrode boiler electrode bar, which comprises the following components in percentage by weight: less than or equal to 0.0015 percent of oxygen, less than or equal to 0.05 percent of carbon, 0.16-0.26 percent of silicon, 0.29-0.40 percent of manganese, less than or equal to 0.018 percent of phosphorus, less than or equal to 0.0015 percent of sulfur, less than or equal to 0.001-0.002 percent of aluminum, the balance of iron, the ferrite structure in the long-life electrode boiler electrode bar is not less than 85 percent, and the surface finish of the long-life electrode boiler electrode bar is more than N5 or N5. The number of inclusions in steel is small, the composition of various elements is highly optimized, and the ferrite proportion is high, so that the potential of a steel micro-area can be effectively reduced, meanwhile, the reaction area can be effectively reduced by smoothly polishing the surface, and the corrosion of the steel can be effectively slowed down, so that the electrochemical corrosion resistance of the electrode rod of the long-life electrode boiler is far better than that of a common electrode rod, the service life of the electrode rod is obviously prolonged, experiments show that the service life of the electrode rod can reach more than 10 years, and the electrode rod in the prior art is seriously corroded after being used for three years and needs to be replaced. Therefore, the long-life electrode boiler electrode bar and the preparation method thereof have the characteristics of strong electrochemical corrosion resistance and obviously prolonged service life.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 shows the wear of the long-life electrode rod of the present invention from one year to three years.
Fig. 2 shows the wear of the conventional electrode rod from one year to three years.
Detailed Description
The invention relates to a long-life electrode boiler electrode bar, which comprises the following components in percentage by weight: less than or equal to 0.0015 percent of oxygen, less than or equal to 0.05 percent of carbon, 0.16-0.26 percent of silicon, 0.29-0.40 percent of manganese, less than or equal to 0.018 percent of phosphorus, less than or equal to 0.0015 percent of sulfur, less than or equal to 0.001-0.002 percent of aluminum, the balance of iron, the ferrite structure in the long-life electrode boiler electrode bar is not less than 85 percent, and the surface finish of the long-life electrode boiler electrode bar is more than N5 or N5.
As a further improvement of the invention, the long-life electrode boiler electrode bar comprises the following components in percentage by weight: less than or equal to 0.0010 percent of oxygen, less than or equal to 0.04 percent of carbon, 0.18 to 0.24 percent of silicon, 0.32 to 0.37 percent of manganese, less than or equal to 0.012 percent of phosphorus, less than or equal to 0.0010 percent of sulfur, less than or equal to 0.0012 to 0.0018 percent of aluminum, and the balance of iron.
As a further improvement of the invention, the long-life electrode boiler electrode bar comprises the following components in percentage by weight: less than or equal to 0.0005 percent of oxygen, less than or equal to 0.02 percent of carbon, 0.20 to 0.22 percent of silicon, 0.34 to 0.35 percent of manganese, less than or equal to 0.008 percent of phosphorus, less than or equal to 0.0005 percent of sulfur, less than or equal to 0.0014 to 0.0016 percent of aluminum, and the balance of iron.
The preparation method of the long-life electrode boiler electrode bar comprises the following steps:
A. adopting a converter-LF refining-RH refining-continuous casting process to smelt steel, adopting a nitrogen increasing and separating technology in the smelting process to deeply remove impurities in steel, wherein the obtained steel comprises the following components in percentage by weight: less than or equal to 0.0015 percent of oxygen, less than or equal to 0.05 percent of carbon, 0.16-0.26 percent of silicon, 0.29-0.40 percent of manganese, less than or equal to 0.018 percent of phosphorus, less than or equal to 0.0015 percent of sulfur, less than or equal to 0.001-0.002 percent of aluminum, and the balance of iron;
B. rolling the steel obtained in the step A at the initial rolling temperature of 1150-1200 ℃ and the final rolling temperature of 850-870 ℃ to obtain a wire rod with a ferrite structure of not less than 85 percent;
C. processing the surface of the wire rod obtained in the step B to enable the surface smoothness to be more than N5 or N5;
D. and D, processing the wire rod obtained in the step C into the long-life electrode boiler electrode rod according to requirements.
As a further improvement of the present invention, in the step a, the long-life electrode boiler electrode rod comprises the following components by weight percent: less than or equal to 0.0010 percent of oxygen, less than or equal to 0.04 percent of carbon, 0.18 to 0.24 percent of silicon, 0.32 to 0.37 percent of manganese, less than or equal to 0.012 percent of phosphorus, less than or equal to 0.0010 percent of sulfur, less than or equal to 0.0012 to 0.0018 percent of aluminum, and the balance of iron.
As a further improvement of the present invention, in the step a, the long-life electrode boiler electrode rod comprises the following components by weight percent: less than or equal to 0.0005 percent of oxygen, less than or equal to 0.02 percent of carbon, 0.20 to 0.22 percent of silicon, 0.34 to 0.35 percent of manganese, less than or equal to 0.008 percent of phosphorus, less than or equal to 0.0005 percent of sulfur, less than or equal to 0.0014 to 0.0016 percent of aluminum, and the balance of iron.
In the step C, the surface of the wire rod is sequentially subjected to 200-mesh, 600-mesh, 1200-mesh and 1500-mesh silicon carbide sand paper for grinding treatment and then polished to obtain the surface of the wire rod with the smoothness of more than N5 or N5.
The long-life electrode boiler electrode bar has the advantages that the number of inclusions in steel is small, the composition of various elements is highly optimized, the proportion of ferrite is high, the potential of micro-areas of steel can be effectively reduced, meanwhile, the reaction area can be effectively reduced by polishing the surface smoothly, and the corrosion of the steel can be effectively slowed down, so that the electrochemical corrosion resistance of the long-life electrode boiler electrode bar is far better than that of a common electrode bar, the service life of the long-life electrode boiler electrode bar is remarkably prolonged, experiments show that the service life of the long-life electrode boiler electrode bar can reach more than 10 years, the electrode bar in the prior art is seriously corroded after being used for three years, and needs to be replaced.
Referring to fig. 1 and 2, fig. 1 shows the wear of the long-life electrode rod of the present invention from one year to three years, and fig. 2 shows the wear of the conventional electrode rod from one year to three years. It is difficult to see that this patent product still can continue to use after using for three years, and prior art's electrode rod is after using for three years, and this electrode rod then has been corroded seriously, needs to be changed.
Claims (7)
1. The long-life electrode boiler electrode bar is characterized by comprising the following components in percentage by weight: less than or equal to 0.0015 percent of oxygen, less than or equal to 0.05 percent of carbon, 0.16-0.26 percent of silicon, 0.29-0.40 percent of manganese, less than or equal to 0.018 percent of phosphorus, less than or equal to 0.0015 percent of sulfur, less than or equal to 0.001-0.002 percent of aluminum, the balance of iron, the ferrite structure in the long-life electrode boiler electrode bar is not less than 85 percent, and the surface finish of the long-life electrode boiler electrode bar is more than N5 or N5.
2. The long life electrode boiler electrode bar of claim 1, wherein: the long-life electrode boiler electrode rod comprises the following components in percentage by weight: less than or equal to 0.0010 percent of oxygen, less than or equal to 0.04 percent of carbon, 0.18 to 0.24 percent of silicon, 0.32 to 0.37 percent of manganese, less than or equal to 0.012 percent of phosphorus, less than or equal to 0.0010 percent of sulfur, less than or equal to 0.0012 to 0.0018 percent of aluminum, and the balance of iron.
3. The long life electrode boiler electrode bar of claim 2, wherein: the long-life electrode boiler electrode rod comprises the following components in percentage by weight: less than or equal to 0.0005 percent of oxygen, less than or equal to 0.02 percent of carbon, 0.20 to 0.22 percent of silicon, 0.34 to 0.35 percent of manganese, less than or equal to 0.008 percent of phosphorus, less than or equal to 0.0005 percent of sulfur, less than or equal to 0.0014 to 0.0016 percent of aluminum, and the balance of iron.
4. The preparation method of the electrode bar of the long-life electrode boiler is characterized by comprising the following steps:
A. a, adopting a converter-LF refining-RH refining-continuous casting process to smelt steel, adopting a nitrogen increasing and separating technology in the smelting process to deeply remove impurities in steel, wherein the obtained steel comprises the following components in percentage by weight: less than or equal to 0.0015 percent of oxygen, less than or equal to 0.05 percent of carbon, 0.16-0.26 percent of silicon, 0.29-0.40 percent of manganese, less than or equal to 0.018 percent of phosphorus, less than or equal to 0.0015 percent of sulfur, less than or equal to 0.001-0.002 percent of aluminum, and the balance of iron;
B. rolling the steel obtained in the step A at the initial rolling temperature of 1150-1200 ℃ and the final rolling temperature of 850-870 ℃ to obtain a wire rod with a ferrite structure of not less than 85 percent;
C. processing the surface of the wire rod obtained in the step B to enable the surface smoothness to be more than N5 or N5;
D. and D, processing the wire rod obtained in the step C into the long-life electrode boiler electrode rod according to requirements.
5. The method for manufacturing a long life electrode boiler electrode bar of claim 4, wherein: in the step A, the long-life electrode boiler electrode rod comprises the following components in percentage by weight: less than or equal to 0.0010 percent of oxygen, less than or equal to 0.04 percent of carbon, 0.18 to 0.24 percent of silicon, 0.32 to 0.37 percent of manganese, less than or equal to 0.012 percent of phosphorus, less than or equal to 0.0010 percent of sulfur, less than or equal to 0.0012 to 0.0018 percent of aluminum, and the balance of iron.
6. The method for manufacturing a long life electrode boiler electrode bar of claim 5, wherein: in the step A, the long-life electrode boiler electrode rod comprises the following components in percentage by weight: less than or equal to 0.0005 percent of oxygen, less than or equal to 0.02 percent of carbon, 0.20 to 0.22 percent of silicon, 0.34 to 0.35 percent of manganese, less than or equal to 0.008 percent of phosphorus, less than or equal to 0.0005 percent of sulfur, less than or equal to 0.0014 to 0.0016 percent of aluminum, and the balance of iron.
7. The method for producing long life electrode boiler electrode rods according to claim 5, 6 or 7, characterized in that: and in the step C, the surface of the wire is sequentially subjected to 200-mesh, 600-mesh, 1200-mesh and 1500-mesh silicon carbide sand paper for grinding treatment and then polished to enable the surface smoothness of the wire to be more than N5 or N5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010162746.8A CN111363979A (en) | 2020-03-10 | 2020-03-10 | Electrode bar of long-life electrode boiler and preparation method thereof |
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| CN202010162746.8A CN111363979A (en) | 2020-03-10 | 2020-03-10 | Electrode bar of long-life electrode boiler and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013133496A (en) * | 2011-12-27 | 2013-07-08 | Jfe Steel Corp | High strength thin steel sheet excellent in formability and method for producing the same |
| CN104404205A (en) * | 2014-10-27 | 2015-03-11 | 北京科技大学 | Method for removing microscopic nonmetallic inclusion in molten steel by using nitrogen-increasing nitrogen-precipitating process |
| CN105886893A (en) * | 2014-12-26 | 2016-08-24 | Posco公司 | Soft magnetic steel having excellent forging characteristic soft magnetic part and method of manufacturing the same |
| CN109338236A (en) * | 2018-04-18 | 2019-02-15 | 江苏沙钢集团有限公司 | A kind of easy welding structural carbon steel and its manufacturing method based on thin-belt casting rolling |
-
2020
- 2020-03-10 CN CN202010162746.8A patent/CN111363979A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013133496A (en) * | 2011-12-27 | 2013-07-08 | Jfe Steel Corp | High strength thin steel sheet excellent in formability and method for producing the same |
| CN104404205A (en) * | 2014-10-27 | 2015-03-11 | 北京科技大学 | Method for removing microscopic nonmetallic inclusion in molten steel by using nitrogen-increasing nitrogen-precipitating process |
| CN105886893A (en) * | 2014-12-26 | 2016-08-24 | Posco公司 | Soft magnetic steel having excellent forging characteristic soft magnetic part and method of manufacturing the same |
| CN109338236A (en) * | 2018-04-18 | 2019-02-15 | 江苏沙钢集团有限公司 | A kind of easy welding structural carbon steel and its manufacturing method based on thin-belt casting rolling |
Non-Patent Citations (2)
| Title |
|---|
| 傅杰等: "《现代电炉炼钢生产技术手册》", 31 March 2009, 冶金工业出版社 * |
| 胡凤翔，于艳丽: "《工程材料与热处理》", 31 August 2008, 北京理工大学出版社 * |
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