CN103122439A - Stainless steel tube applied to high-parameter ultra-supercritical thermal power generating unit and manufacturing process thereof - Google Patents
Stainless steel tube applied to high-parameter ultra-supercritical thermal power generating unit and manufacturing process thereof Download PDFInfo
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- CN103122439A CN103122439A CN2013100525927A CN201310052592A CN103122439A CN 103122439 A CN103122439 A CN 103122439A CN 2013100525927 A CN2013100525927 A CN 2013100525927A CN 201310052592 A CN201310052592 A CN 201310052592A CN 103122439 A CN103122439 A CN 103122439A
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Abstract
The invention relates to a stainless steel tube and a manufacturing process thereof, and relates to a stainless steel tube applied to a high-parameter ultra-supercritical thermal power generating unit, and a manufacturing process of the stainless steel tube. The stainless steel tube comprises the following ingredients in percent by mass: 0.05-0.1% of C, 0.85-1% of Si, 0.8-1.5% of Mn, 29-32% of Ni, 15-17% of Cr, 0.35-0.45% of Nb, 0.02-0.03% of Cu, 0.01-0.03% of N, 1.5-2.5% of Mo, 2.5-3% of Al, 3-5% of lanthanide series rare earth and the balance of Fe. Through setup of the ingredients and process parameters, in particular the addition of an appropriate amount of a lanthanide series rare earth element, and a bright heat-treatment procedure using a pure hydrogen protecting gas, the stainless steel tube applied to the thermal power generating unit is outstanding in oxidation resistance and is high in inner and outer surface roughness, yield strength, extension strength and the like.
Description
Technical field
The present invention relates to a kind of stainless steel tube and manufacturing process thereof, specifically stainless steel tube and manufacturing process thereof for a kind of high-parameters ultra supercritical fired power generating unit.
Background technology
The ultra supercritical thermal power generation unit of large capacity, high-parameters can improve efficiency of fire coal, reduces environmental pollution, is the developing direction of current fired power generating unit in the world.Within 2011, most recent layout shows, during China 12, the steam parameter of ultra supercritical unit reaches breakthrough at 650 ℃/650 ℃, will reach 700 ℃, 400,000,000 kilowatts of the year two thousand twenty adding new capacities to the year two thousand twenty.Along with the raising of fired power generating unit parameter, the also corresponding raising of requirement of tubing for unit.And tube product is complex-shaped, dimensional precision and surface quality require highly, the elbow wall thickness is controlled strict, and manufacture difficulty is large.The ultra supercritical fired power generating unit is the manufacturing bottleneck of chain drive by novel material and manufacturing technology thereof at present, has obtained the great attention of countries in the world, also becomes object content and the know-how of research and development.
China has become steel pipe's production and consumption big country, but there are larger gap in equipment and quality product and advanced developed country, and especially power station equipment is used the with high content of technology of pipe; manufacture difficulty is large; for a long time, monopolized by offshore company always, mainly contained the V& of Japanese Sumitomo, France; The Ben Tele of M, Germany and Plymouth Deng， China of the U.S. is dependence on import basically.Expensive starting material and supporting import charges, by restricting to a great extent the competitive power of China's electricity fired power generating unit, even affect the sound development of whole industry.
In prior art, unreasonable due to composition and technique, thus cause fired power generating unit poor with the stainless steel tube antioxidant property, tensile strength and high-yield strength are not high, and surfaceness is higher.
Summary of the invention
Technical problem to be solved by this invention is:
How to guarantee that fired power generating unit has outstanding antioxidant property with stainless steel tube, forms fine and close oxide film;
How to make to guarantee that fired power generating unit has high-tensile and high-yield strength with stainless steel tube;
How to guarantee that fired power generating unit has less surfaceness with stainless steel tube.
The technical scheme that the present invention solves above technical problem is:
A kind of high-parameters ultra supercritical fired power generating unit stainless steel tube, the mass percent of its component is: C:0.05-0.10%, Si:0.85-1.0%, Mn:0.8-1.5%, Ni:29.0-32.0%, Cr:15.0-17.0%, Nb:0.35-0.45%, Cu:0.02-0.03%, N:0.01-0.03%, Mo:1.5-2.5%, Al:2.5-3.0%, lanthanide rare: 3-5%, surplus is Fe.
The manufacturing process of stainless steel tube for high-parameters ultra supercritical fired power generating unit, carry out according to the following steps:
(i) component and content are met and wants mother tube to be cold-rolled to the intermediate blank pipe of required pipe external diameter and wall thickness by cold-rolling equipment, pipe detector for outer diameter error ± 0.50mm, wall thickness deflection ± 0.25mm;
(ii) by step (i) gained intermediate blank pipe heat-treat, temperature is 1200-1250 ℃, the time is 10-15min, is cooled to afterwards room temperature;
(iii) by step (ii) the intermediate blank pipe after thermal treatment by cold-rolling equipment finish rolling the production tube to required pipe external diameter and wall thickness, pipe detector for outer diameter error ± 0.10mm, wall thickness deflection ± 0.10mm;
(iv) adopt to soak the cloth of acetone, and, by the pressure of high pressure air rifle, pressure >=4MP, advance cloth to carry out multifrequency time wiping through finished-product straight pipe inside, deoiled and clean;
(v) the production tube after adopting pure hydrogen shielding gas to clean carries out bright heat treatment, and thermal treatment temp is 1000 ± 10 ℃, and heat treatment time is 15-20min, is cooled to afterwards room temperature and carries out straightening processing;
(vi) to will, through the (v) finished-product straight pipe nondestructive testing after straightening processing of step, detecting qualified rear packing warehouse-in.
The technical scheme that the present invention further limits is:
Aforesaid high-parameters ultra supercritical fired power generating unit stainless steel tube, the constituent mass per-cent of lanthanide rare is: lanthanum (La): 15-20%, cerium (Ce): 22-26%, praseodymium (Pr): 20-25%, neodymium (Nd): 15-20%, dysprosium (Dy): 10-15%, all the other lanthanon: 2-6%, above each component sum is 100%.
The present invention is by the restriction of composition and processing parameter; particularly add appropriate lanthanide series rare-earth elements; and the bright heat treatment operation of pure hydrogen shielding gas; can make fired power generating unit of the present invention very outstanding with the stainless steel tube antioxidant property; surface forms dense oxidation film; Fig. 1 is the surface topography map of existing fired power generating unit with stainless steel tube; Fig. 2 is the surface topography map of high-parameters ultra supercritical fired power generating unit of the present invention with stainless steel tube; contrast can be found out, steel tube surface formation dense oxidation film of the present invention.Equally, the present invention is by the restriction of composition and processing parameter, not only make steel pipe there is antioxidant property preferably, simultaneously for high-parameters ultra supercritical fired power generating unit of the present invention, stainless steel tube surfaces externally and internally roughness, yield strength and tensile strength etc. are all higher, all reach and higher than the international standard level surfaces externally and internally roughness≤3.0 μ m, normal temperature lower yield strength >=190MPa, 350 ℃ of high-temperature yield strength >=190MPa, tensile strength >=520MPa, unit elongation >=45%; The specific performance index can be in detail in Table 1:
The performance index contrast of table 1 the present invention and currently available products
The accompanying drawing explanation
Fig. 1 is the surface topography map of existing fired power generating unit with stainless steel tube.
Fig. 2 is the surface topography map of high-parameters ultra supercritical fired power generating unit of the present invention with stainless steel tube.
Embodiment
Embodiment 1
The high-parameters ultra supercritical fired power generating unit stainless steel tube of the present embodiment, the mass percent of its component is: C:0.05%, Si:1.0%, Mn:1.0%, Ni:29.0%, Cr:16.0%, Nb:0.35%, Cu:0.02%, N:0.03%, Mo:1.5%, Al:2.8%, lanthanide rare: 3%, surplus is Fe; The constituent mass per-cent of described lanthanide rare is: La:16%, Ce:26%, Pr:20%, Nd:20%, Dy:15%, all the other lanthanon: 3%.
The manufacturing process of stainless steel tube for the present embodiment high-parameters ultra supercritical fired power generating unit, carry out according to the following steps:
(i) component and content are met and wants mother tube to be cold-rolled to the intermediate blank pipe of required pipe external diameter and wall thickness by cold-rolling equipment, pipe detector for outer diameter error ± 0.50mm, wall thickness deflection ± 0.25mm;
(ii) by step (i) gained intermediate blank pipe heat-treat, temperature is 1200 ℃, the time is 15min, is cooled to afterwards room temperature;
(iii) by step (ii) the intermediate blank pipe after thermal treatment by cold-rolling equipment finish rolling the production tube to required pipe external diameter and wall thickness, pipe detector for outer diameter error ± 0.10mm, wall thickness deflection ± 0.10mm;
(iv) adopt to soak the cloth of acetone, and, by the pressure of high pressure air rifle, pressure 4MP, advance cloth to carry out multifrequency time wiping through finished-product straight pipe inside, deoiled and clean;
(v) the production tube after adopting pure hydrogen shielding gas to clean carries out bright heat treatment, and thermal treatment temp is 1000 ℃, and heat treatment time is 18min, is cooled to afterwards room temperature and carries out straightening processing;
(vi) to will, through the (v) finished-product straight pipe nondestructive testing after straightening processing of step, detecting qualified rear packing warehouse-in.
Embodiment 2
The high-parameters ultra supercritical fired power generating unit stainless steel tube of the present embodiment, the mass percent of its component is: C:0.10%, Si:0.9%, Mn:0.8%, Ni:32.0%, Cr:17.0%, Nb:0.45%, Cu:0.03%, N:0.02%, Mo:2.0%, Al:3.0%, lanthanide rare: 5%, surplus is Fe; The constituent mass per-cent of described lanthanide rare is: La:20%, Ce:25%, Pr:25%, Nd:15%, Dy:13%, all the other lanthanon: 2%.
The manufacturing process of stainless steel tube for the present embodiment high-parameters ultra supercritical fired power generating unit, carry out according to the following steps:
(i) component and content are met and wants mother tube to be cold-rolled to the intermediate blank pipe of required pipe external diameter and wall thickness by cold-rolling equipment, pipe detector for outer diameter error ± 0.50mm, wall thickness deflection ± 0.25mm;
(ii) by step (i) gained intermediate blank pipe heat-treat, temperature is 1230 ℃, the time is 13min, is cooled to afterwards room temperature;
(iii) by step (ii) the intermediate blank pipe after thermal treatment by cold-rolling equipment finish rolling the production tube to required pipe external diameter and wall thickness, pipe detector for outer diameter error ± 0.10mm, wall thickness deflection ± 0.10mm;
(iv) adopt to soak the cloth of acetone, and, by the pressure of high pressure air rifle, pressure 6MP, advance cloth to carry out multifrequency time wiping through finished-product straight pipe inside, deoiled and clean;
(v) the production tube after adopting pure hydrogen shielding gas to clean carries out bright heat treatment, and thermal treatment temp is 990 ℃, and heat treatment time is 20min, is cooled to afterwards room temperature and carries out straightening processing;
(vi) to will, through the (v) finished-product straight pipe nondestructive testing after straightening processing of step, detecting qualified rear packing warehouse-in.
Embodiment 3
The high-parameters ultra supercritical fired power generating unit stainless steel tube of the present embodiment, it is characterized in that: the mass percent of its component is: C:0.08%, Si:0.8%, Mn:1.5%, Ni:30.0%, Cr:15.0%, Nb:0.40%, Cu:0.03%, N:0.01%, Mo:2.5%, Al:2.5%, lanthanide rare: 4%, surplus is Fe; The constituent mass per-cent of described lanthanide rare is: La:19%, Ce:22%, Pr:24%, Nd:19%, Dy:10%, all the other lanthanon: 6%.
The manufacturing process of stainless steel tube for the present embodiment high-parameters ultra supercritical fired power generating unit, carry out according to the following steps:
(i) component and content are met and wants mother tube to be cold-rolled to the intermediate blank pipe of required pipe external diameter and wall thickness by cold-rolling equipment, pipe detector for outer diameter error ± 0.50mm, wall thickness deflection ± 0.25mm;
(ii) by step (i) gained intermediate blank pipe heat-treat, temperature is 1250 ℃, the time is 10min, is cooled to afterwards room temperature;
(iii) by step (ii) the intermediate blank pipe after thermal treatment by cold-rolling equipment finish rolling the production tube to required pipe external diameter and wall thickness, pipe detector for outer diameter error ± 0.10mm, wall thickness deflection ± 0.10mm;
(iv) adopt to soak the cloth of acetone, and, by the pressure of high pressure air rifle, pressure 10MP, advance cloth to carry out multifrequency time wiping through finished-product straight pipe inside, deoiled and clean;
(v) the production tube after adopting pure hydrogen shielding gas to clean carries out bright heat treatment, and thermal treatment temp is 1010 ℃, and heat treatment time is 15min, is cooled to afterwards room temperature and carries out straightening processing;
(vi) to will, through the (v) finished-product straight pipe nondestructive testing after straightening processing of step, detecting qualified rear packing warehouse-in.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (7)
1. a high-parameters ultra supercritical fired power generating unit stainless steel tube, it is characterized in that: the mass percent of its component is: C:0.05-0.10%, Si:0.85-1.0%, Mn:0.8-1.5%, Ni:29.0-32.0%, Cr:15.0-17.0%, Nb:0.35-0.45%, Cu:0.02-0.03%, N:0.01-0.03%, Mo:1.5-2.5%, Al:2.5-3.0%, lanthanide rare: 3-5%, surplus is Fe.
2.2. high-parameters ultra supercritical fired power generating unit stainless steel tube as claimed in claim 1, it is characterized in that: the constituent mass per-cent of described lanthanide rare is: lanthanum: 15-20%, cerium: 22-26%, praseodymium: 20-25%, neodymium: 15-20%, dysprosium: 10-15%, all the other lanthanon: 2-6%, above each component sum is 100%.
3.3. high-parameters ultra supercritical fired power generating unit stainless steel tube as claimed in claim 1 or 2, it is characterized in that: the mass percent of its component is: C:0.05%, Si:1.0%, Mn:1.0%, Ni:29.0%, Cr:16.0%, Nb:0.35%, Cu:0.02%, N:0.03%, Mo:1.5%, Al:2.8%, lanthanide rare: 3%, surplus is Fe; The constituent mass per-cent of described lanthanide rare is: lanthanum: 16%, and cerium: 26%, praseodymium: 20%, neodymium: 20%, dysprosium: 15%, all the other lanthanon: 3%.
4.4. high-parameters ultra supercritical fired power generating unit stainless steel tube as claimed in claim 1 or 2, it is characterized in that: the mass percent of its component is: C:0.10%, Si:0.9%, Mn:0.8%, Ni:32.0%, Cr:17.0%, Nb:0.45%, Cu:0.03%, N:0.02%, Mo:2.0%, Al:3.0%, lanthanide rare: 5%, surplus is Fe; The constituent mass per-cent of described lanthanide rare is: lanthanum: 20%, and cerium: 25%, praseodymium: 25%, neodymium: 15%, dysprosium: 13%, all the other lanthanon: 2%.
5.5. high-parameters ultra supercritical fired power generating unit stainless steel tube as claimed in claim 1 or 2, it is characterized in that: the mass percent of its component is: C:0.08%, Si:0.8%, Mn:1.5%, Ni:30.0%, Cr:15.0%, Nb:0.40%, Cu:0.03%, N:0.01%, Mo:2.5%, Al:2.5%, lanthanide rare: 4%, surplus is Fe; The constituent mass per-cent of described lanthanide rare is: lanthanum: 19%, and cerium: 22%, praseodymium: 24%, neodymium: 19%, dysprosium: 10%, all the other lanthanon: 6%.
6.6. high-parameters ultra supercritical fired power generating unit stainless steel tube as claimed in claim 1 or 2, it is characterized in that: stainless steel tube surfaces externally and internally roughness for described high-parameters ultra supercritical fired power generating unit≤3.0 μ m, normal temperature lower yield strength >=190MPa, 350 ℃ of high-temperature yield strength >=120MPa, tensile strength >=520MPa, unit elongation >=45%.
7.7. the manufacturing process of stainless steel tube for high-parameters ultra supercritical fired power generating unit as claimed in claim 1 or 2 is characterized in that: carry out according to the following steps:
(i) component and content are met and wants mother tube to be cold-rolled to the intermediate blank pipe of required pipe external diameter and wall thickness by cold-rolling equipment, pipe detector for outer diameter error ± 0.50mm, wall thickness deflection ± 0.25mm;
(ii) by step (i) gained intermediate blank pipe heat-treat, temperature is 1200-1250 ℃, the time is 10-15min, is cooled to afterwards room temperature;
(iii) by step (ii) the intermediate blank pipe after thermal treatment by cold-rolling equipment finish rolling the production tube to required pipe external diameter and wall thickness, pipe detector for outer diameter error ± 0.10mm, wall thickness deflection ± 0.10mm;
(iv) adopt to soak the cloth of acetone, and, by the pressure of high pressure air rifle, pressure >=4MP, advance cloth to carry out multifrequency time wiping through finished-product straight pipe inside, deoiled and clean;
(v) the production tube after adopting pure hydrogen shielding gas to clean carries out bright heat treatment, and thermal treatment temp is 1000 ± 10 ℃, and heat treatment time is 15-20min, is cooled to afterwards room temperature and carries out straightening processing;
(vi) to will, through the (v) finished-product straight pipe nondestructive testing after straightening processing of step, detecting qualified rear packing warehouse-in.
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| CN201310052592.7A CN103122439B (en) | 2013-02-18 | 2013-02-18 | Stainless steel tube applied to high-parameter ultra-supercritical thermal power generating unit and manufacturing process thereof |
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| CN201310052592.7A CN103122439B (en) | 2013-02-18 | 2013-02-18 | Stainless steel tube applied to high-parameter ultra-supercritical thermal power generating unit and manufacturing process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623431A (en) * | 2016-10-25 | 2017-05-10 | 江苏银环精密钢管有限公司 | Perforating process for steel tube for key boiler of ultra-supercritical thermal power generating unit |
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| JPH1072645A (en) * | 1996-05-29 | 1998-03-17 | Sumitomo Metal Ind Ltd | Stainless steel material for ozone-containing water and its production |
| JPH10251750A (en) * | 1997-02-28 | 1998-09-22 | Union Sider Nord Est Fr <Usinor> | Production of ferritic stainless steel foil high in content of aluminum and usable as catalytic carrier of automobile exhaust pipe |
| JP3424599B2 (en) * | 1999-05-11 | 2003-07-07 | 住友金属工業株式会社 | Austenitic stainless steel with excellent hot workability |
| JP2005023353A (en) * | 2003-06-30 | 2005-01-27 | Sumitomo Metal Ind Ltd | Austenitic stainless steel for high temperature water environment |
| CN1748042A (en) * | 2003-02-06 | 2006-03-15 | Ati资产公司 | Austenitic stainless steels including molybdenum |
| US7815848B2 (en) * | 2006-05-08 | 2010-10-19 | Huntington Alloys Corporation | Corrosion resistant alloy and components made therefrom |
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2013
- 2013-02-18 CN CN201310052592.7A patent/CN103122439B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1072645A (en) * | 1996-05-29 | 1998-03-17 | Sumitomo Metal Ind Ltd | Stainless steel material for ozone-containing water and its production |
| JPH10251750A (en) * | 1997-02-28 | 1998-09-22 | Union Sider Nord Est Fr <Usinor> | Production of ferritic stainless steel foil high in content of aluminum and usable as catalytic carrier of automobile exhaust pipe |
| JP3424599B2 (en) * | 1999-05-11 | 2003-07-07 | 住友金属工業株式会社 | Austenitic stainless steel with excellent hot workability |
| CN1748042A (en) * | 2003-02-06 | 2006-03-15 | Ati资产公司 | Austenitic stainless steels including molybdenum |
| JP2005023353A (en) * | 2003-06-30 | 2005-01-27 | Sumitomo Metal Ind Ltd | Austenitic stainless steel for high temperature water environment |
| US7815848B2 (en) * | 2006-05-08 | 2010-10-19 | Huntington Alloys Corporation | Corrosion resistant alloy and components made therefrom |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623431A (en) * | 2016-10-25 | 2017-05-10 | 江苏银环精密钢管有限公司 | Perforating process for steel tube for key boiler of ultra-supercritical thermal power generating unit |
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Denomination of invention: A stainless steel pipe for high parameter ultra supercritical thermal power unit and its manufacturing process Effective date of registration: 20211117 Granted publication date: 20141008 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi Huishan branch Pledgor: WUXI XINCHANG STEEL PIPE Co.,Ltd. Registration number: Y2021320010479 |
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