CN103060709B - Precise stainless steel tube for nuclear power unit, and its making technology - Google Patents
Precise stainless steel tube for nuclear power unit, and its making technology Download PDFInfo
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- CN103060709B CN103060709B CN201310005866.7A CN201310005866A CN103060709B CN 103060709 B CN103060709 B CN 103060709B CN 201310005866 A CN201310005866 A CN 201310005866A CN 103060709 B CN103060709 B CN 103060709B
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Abstract
The invention relates to a stainless steel tube and its making technology, and concretely relates to a precise stainless steel tube for a nuclear power unit, and its making technology. The precise stainless steel tube comprises the following components, by mass, 0.04-0.05% of C, 0.15-0.3% of Si, 0.8-1% of Mn, 13-15% of Ni, 15-17% of Cr, 0.2-0.4% of Nb, 2.5-3.5% of Cu, 0.15-0.2% of N, 0.15-0.25% of Mo, 0.2-0.3% of Al, 6-8% of lanthanide rare earth, and the balance Fe. The limitation of the components and technological parameters, the addition of proper amounts of lanthanide rare earth elements, and the pure hydrogen protection gas bright-heat treatment operation make the stainless steel tube have a good corrosion resistance, and simultaneously the internal surface roughness, the external surface roughness, the yield strength, the tensile strength and the like of the precise stainless steel tube for a nuclear power unit are high.
Description
Technical field
The present invention relates to a kind of stainless steel tube and manufacturing process thereof, specifically a kind of nuclear power generating sets accurate stainless steel tube and manufacturing process thereof.
Background technology
Nuclear power is the important directions of world energy sources development, relates to the great elementary item of national economic development lifeblood.China has 15 nuclear power generating sets at present, and the nuclear power generating sets that the whole world is being run have 441; Chinese Nuclear Power total installation of generating capacity accounts for national total installation of generating capacity about 1.2%, and the mean level (ML) of global nuclear power installed capacity is 17%.According to the statistics about international organization, due to the dual-pressure of the energy and environment, add the technical progress of world nuclear aspect, the whole world will start the climax of Construction of Nuclear Electricity.In March, 2006, State Council have passed China " national medium-term and long-term nuclear power developing planning " (2005-2020), and after about 30 years, China's nuclear energy power generation is expected to the mean level (ML) reaching the development of current world nuclear.
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, especially power station equipment pipe is with high content of technology, manufacture difficulty is large, for a long time, being monopolized by offshore company, mainly contain the Sumitomo of Japan, French V & M, the Ben Tele of Germany and the Plymouth etc. of the U.S., China is dependence on import substantially always.Expensive starting material and supporting import charges, will restrict the competitive power of China's nuclear power generating sets to a great extent, even affect the sound development of whole industry.
In prior art, unreasonable due to composition and technique, thus cause nuclear power generating sets not high with accurate stainless steel tube corrosion resistance, 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 ensure that the stainless stainless steel tube of nuclear power generating sets has outstanding corrosion resistance;
The stainless stainless steel tube of guarantee nuclear power generating sets how is made to have high-tensile and high-yield strength;
How to ensure that the stainless stainless steel tube of nuclear power generating sets has less surfaceness.
The technical scheme that the present invention solves above technical problem is:
The accurate stainless steel tube of a kind of nuclear power generating sets, the mass percent of its component is: C:0.04-0.05%, Si:0.15-0.3%, Mn:0.8-1.0%, Ni:13.0-15.0%, Cr:15.0-17.0%, Nb:0.2-0.4%, Cu:2.5-3.5%, N:0.15-0.20%, Mo:0.15-0.25%, Al:0.2-0.3%, lanthanide rare: 6-8%, surplus is Fe.
The nuclear power generating sets manufacturing process of accurate stainless steel tube, carry out according to the following steps:
(i) component and content being met 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 890-950 DEG C, and the time is 20-30min, is cooled to room temperature afterwards;
(iii) by the intermediate blank pipe after step (ii) thermal treatment by cold-rolling equipment finish rolling to the production tube of required pipe external diameter and wall thickness, pipe detector for outer diameter error ± 0.10mm, wall thickness deflection ± 0.10mm;
(iv) adopt and soak the cloth of acetone, and by the pressure of high pressure air rifle, pressure >=4MP, advances cloth to carry out multifrequency time wiping through finished-product straight pipe inside, carry out deoiling and clean;
(v) adopt pure hydrogen shielding gas to carry out bright heat treatment to the production tube after clean, thermal treatment temp is 1100 ± 10 DEG C, and heat treatment time is 5-10min, is cooled to room temperature afterwards and carries out straightening processing;
(vi) to by the finished-product straight pipe nondestructive testing after step (v) straightening processing, qualified rear packaging warehouse-in is detected.
The technical scheme that the present invention limits further is:
The accurate stainless steel tube of aforesaid nuclear power generating sets, the constituent mass per-cent of lanthanide rare is: lanthanum (La): 35-40%, cerium (Ce): 12-15%, samarium (Sm): 20-25%, neodymium (Nd): 10-13%, gadolinium (Gd): 5-12%, all the other lanthanon: 2-8%, above each component sum is 100%.
The present invention passes through 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, both avoided the precipitation of carbide at intergranular, prevent again carburizing and the nitriding of heat treatment process simultaneously, ensure that the corrosion resistance of material; Stainless steel tube of the present invention adopts boiling MgCl
2test and open loop test, the unrelieved stress of inspection straight tube and bend pipe, has comparatively excellent corrosion resistance nature; Equally, the present invention passes through the restriction of composition and processing parameter, stainless steel tube is not only made to have good corrosion resistance, simultaneously the accurate stainless steel tube surfaces externally and internally roughness of nuclear power generating sets of the present invention, yield strength and tensile strength etc. are all higher, all reach and higher than international standard level, surfaces externally and internally roughness≤1.0 μm, normal temperature lower yield strength>=190MPa, 350 DEG C of high-temperature yield strength>=190MPa, tensile strength>=520MPa, unit elongation>=45%; Specific performance index can in detail in table 1:
The performance index of table 1 the present invention and currently available products contrast
Embodiment
embodiment 1
The accurate stainless steel tube of nuclear power generating sets of the present embodiment, the mass percent of its component is: C:0.04%, Si:0.3%, Mn:1.0%, Ni:14.0%, Cr:15.0%, Nb:0.2%, Cu:2.5%, N:0.18%, Mo:0.15%, Al:0.2%, lanthanide rare: 6%, surplus is Fe; The constituent mass per-cent of lanthanide rare is: La:35%, Ce:15%, Sm:20%, Nd:13%, Gd:12%, all the other lanthanon: 5%.
The nuclear power generating sets manufacturing process of accurate stainless steel tube of the present embodiment, carry out according to the following steps:
(i) component and content being met 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 890 DEG C, and the time is 30min, is cooled to room temperature afterwards;
(iii) by the intermediate blank pipe after step (ii) thermal treatment by cold-rolling equipment finish rolling to the production tube of required pipe external diameter and wall thickness, pipe detector for outer diameter error ± 0.10mm, wall thickness deflection ± 0.10mm;
(iv) adopt and soak the cloth of acetone, and by the pressure of high pressure air rifle, pressure 4MP, advances cloth to carry out multifrequency time wiping through finished-product straight pipe inside, carry out deoiling and clean;
(v) adopt pure hydrogen shielding gas to carry out bright heat treatment to the production tube after clean, thermal treatment temp is 1100 DEG C, and heat treatment time is 8min, is cooled to room temperature afterwards and carries out straightening processing;
(vi) to by the finished-product straight pipe nondestructive testing after step (v) straightening processing, qualified rear packaging warehouse-in is detected.
embodiment 2
The accurate stainless steel tube of nuclear power generating sets of the present embodiment, the mass percent of its component is: C:0.04%, Si:0.15%, Mn:0.8%, Ni:13.0%, Cr:17.0%, Nb:0.4%, Cu:3.5%, N:0.15%, Mo:0.25%, Al:0.3%, lanthanide rare: 8%, surplus is Fe; The constituent mass per-cent of lanthanide rare is: La:40%, Ce:12%, Sm:25%, Nd:11%, Gd:10%, all the other lanthanon: 2%.
The nuclear power generating sets manufacturing process of accurate stainless steel tube of the present embodiment, carry out according to the following steps:
(i) component and content being met 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 900 DEG C, and the time is 25min, is cooled to room temperature afterwards;
(iii) by the intermediate blank pipe after step (ii) thermal treatment by cold-rolling equipment finish rolling to the production tube of required pipe external diameter and wall thickness, pipe detector for outer diameter error ± 0.10mm, wall thickness deflection ± 0.10mm;
(iv) adopt and soak the cloth of acetone, and by the pressure of high pressure air rifle, pressure 10MP, advances cloth to carry out multifrequency time wiping through finished-product straight pipe inside, carry out deoiling and clean;
(v) adopt pure hydrogen shielding gas to carry out bright heat treatment to the production tube after clean, thermal treatment temp is 1090 DEG C, and heat treatment time is 10min, is cooled to room temperature afterwards and carries out straightening processing;
(vi) to by the finished-product straight pipe nondestructive testing after step (v) straightening processing, qualified rear packaging warehouse-in is detected.
embodiment 3
The accurate stainless steel tube of nuclear power generating sets of the present embodiment, the mass percent of its component is: C:0.05%, Si:0.25%, Mn:0.9%, Ni:15.0%, Cr:16.0%, Nb:0.3%, Cu:3.0%, N:0.20%, Mo:0.20%, Al:0.2%, lanthanide rare: 7%, surplus is Fe; The constituent mass per-cent of lanthanide rare is: La:39%, Ce:14%, Sm:24%, Nd:10%, Gd:5%, all the other lanthanon: 8%.
The nuclear power generating sets manufacturing process of accurate stainless steel tube of the present embodiment, carry out according to the following steps:
(i) component and content being met 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 950 DEG C, and the time is 20min, is cooled to room temperature afterwards;
(iii) by the intermediate blank pipe after step (ii) thermal treatment by cold-rolling equipment finish rolling to the production tube of required pipe external diameter and wall thickness, pipe detector for outer diameter error ± 0.10mm, wall thickness deflection ± 0.10mm;
(iv) adopt and soak the cloth of acetone, and by the pressure of high pressure air rifle, pressure 8MP, advances cloth to carry out multifrequency time wiping through finished-product straight pipe inside, carry out deoiling and clean;
(v) adopt pure hydrogen shielding gas to carry out bright heat treatment to the production tube after clean, thermal treatment temp is 1110 DEG C, and heat treatment time is 5min, is cooled to room temperature afterwards and carries out straightening processing;
(vi) to by the finished-product straight pipe nondestructive testing after step (v) straightening processing, qualified rear packaging warehouse-in is detected.
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 application claims.
Claims (6)
1. the accurate stainless steel tube of nuclear power generating sets, is characterized in that: the mass percent of its component is: C:0.04-0.05%, Si:0.15-0.3%, Mn:0.8-1.0%, Ni:13.0-15.0%, Cr:15.0-17.0%, Nb:0.2-0.4%, Cu:2.5-3.5%, N:0.15-0.20%, Mo:0.15-0.25%, Al:0.2-0.3%, lanthanide rare: 6-8%, surplus is Fe;
The constituent mass per-cent of described lanthanide rare is: lanthanum: 35-40%, cerium: 12-15%, samarium: 20-25%, neodymium: 10-13%, gadolinium: 5-12%, all the other lanthanon: 2-8%, and above each component sum is 100%.
2. the accurate stainless steel tube of nuclear power generating sets as claimed in claim 1, is characterized in that: the mass percent of its component is: C:0.04%, Si:0.3%, Mn:1.0%, Ni:14.0%, Cr:15.0%, Nb:0.2%, Cu:2.5%, N:0.18%, Mo:0.15%, Al:0.2%, lanthanide rare: 6%, surplus is Fe; The constituent mass per-cent of described lanthanide rare is: lanthanum: 35%, cerium: 15%, samarium: 20%, neodymium: 13%, gadolinium: 12%, all the other lanthanon: 5%.
3. the accurate stainless steel tube of nuclear power generating sets as claimed in claim 1, is characterized in that: the mass percent of its component is: C:0.04%, Si:0.15%, Mn:0.8%, Ni:13.0%, Cr:17.0%, Nb:0.4%, Cu:3.5%, N:0.15%, Mo:0.25%, Al:0.3%, lanthanide rare: 8%, surplus is Fe; The constituent mass per-cent of described lanthanide rare is: lanthanum: 40%, cerium: 12%, samarium: 25%, neodymium: 11%, gadolinium: 10%, all the other lanthanon: 2%.
4. the accurate stainless steel tube of nuclear power generating sets as claimed in claim 1, is characterized in that: the mass percent of its component is: C:0.05%, Si:0.25%, Mn:0.9%, Ni:15.0%, Cr:16.0%, Nb:0.3%, Cu:3.0%, N:0.20%, Mo:0.20%, Al:0.2%, lanthanide rare: 7%, surplus is Fe; The constituent mass per-cent of described lanthanide rare is: lanthanum: 39%, cerium: 14%, samarium: 24%, neodymium: 10%, gadolinium: 5%, all the other lanthanon: 8%.
5. the accurate stainless steel tube of nuclear power generating sets as claimed in claim 1, it is characterized in that: accurate stainless steel tube surfaces externally and internally roughness≤1.0 μm of described nuclear power generating sets, normal temperature lower yield strength >=190MPa, 350 DEG C of high-temperature yield strength >=190MPa, tensile strength >=520MPa, unit elongation >=45%.
6. the nuclear power generating sets manufacturing process of accurate stainless steel tube as claimed in claim 1, is characterized in that: carry out according to the following steps:
(i) component and the satisfactory mother tube of content are 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 890-950 DEG C, and the time is 20-30min, is cooled to room temperature afterwards;
(iii) by the intermediate blank pipe after step (ii) thermal treatment by cold-rolling equipment finish rolling to the production tube of required pipe external diameter and wall thickness, pipe detector for outer diameter error ± 0.10mm, wall thickness deflection ± 0.10mm;
(iv) adopt and soak the cloth of acetone, and by the pressure of high pressure air rifle, pressure >=4 MPa, advances cloth to carry out multifrequency time wiping through finished-product straight pipe inside, carry out deoiling and clean;
(v) adopt pure hydrogen shielding gas to carry out bright heat treatment to the production tube after clean, thermal treatment temp is 1100 ± 10 DEG C, and heat treatment time is 5-10min, is cooled to room temperature afterwards and carries out straightening processing;
(vi) to by the finished-product straight pipe nondestructive testing after step (v) straightening processing, qualified rear packaging warehouse-in is detected.
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| CN201310005866.7A CN103060709B (en) | 2013-01-08 | 2013-01-08 | Precise stainless steel tube for nuclear power unit, and its making technology |
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| CN201310005866.7A CN103060709B (en) | 2013-01-08 | 2013-01-08 | Precise stainless steel tube for nuclear power unit, and its making technology |
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| CN103060709B true CN103060709B (en) | 2014-12-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015109552A1 (en) * | 2014-01-25 | 2015-07-30 | 吴津宁 | Stainless steel seamless pipe |
| CN109659050A (en) * | 2018-11-26 | 2019-04-19 | 中广核核电运营有限公司 | A kind of replacement stick and its manufacturing method for Nuclear Plant |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5939018A (en) * | 1984-10-10 | 1999-08-17 | Kawasaki Steel Corporation | Martensitic stainless steels for seamless steel pipe |
| CN102312175A (en) * | 2011-07-01 | 2012-01-11 | 山西太钢不锈钢股份有限公司 | Method for manufacturing stainless steel plate used for thermonuclear fusion reactor |
| CN102510909A (en) * | 2011-11-18 | 2012-06-20 | 住友金属工业株式会社 | Austenitic stainless steel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60215747A (en) * | 1984-04-11 | 1985-10-29 | Hitachi Ltd | Corrosion- and heat-resistant alloy for coal gasifiction |
| JP2010121190A (en) * | 2008-11-21 | 2010-06-03 | Nisshin Steel Co Ltd | Austenitic stainless welded pipe for high-pressure hydrogen transport, and method for producing the same |
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- 2013-01-08 CN CN201310005866.7A patent/CN103060709B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5939018A (en) * | 1984-10-10 | 1999-08-17 | Kawasaki Steel Corporation | Martensitic stainless steels for seamless steel pipe |
| CN102312175A (en) * | 2011-07-01 | 2012-01-11 | 山西太钢不锈钢股份有限公司 | Method for manufacturing stainless steel plate used for thermonuclear fusion reactor |
| CN102510909A (en) * | 2011-11-18 | 2012-06-20 | 住友金属工业株式会社 | Austenitic stainless steel |
Non-Patent Citations (2)
| Title |
|---|
| JP昭60-215747A 1985.10.29 * |
| JP特开2010-121190A 2010.06.03 * |
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Owner name: JIANGSU YINHUAN PRECISION STEEL TUBE CO., LTD. Free format text: FORMER NAME: JIANGSU YINHUAN STEEL TUBE CO., LTD. |
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Address after: 214200 Yixing City, Jiangsu Province Economic Development Zone, Wuxi Patentee after: Jiangsu Yin Huan precision tube company limited Address before: 214200 Yixing City, Jiangsu Province Economic Development Zone, Wuxi Patentee before: Jiangsu Yinhuan Steel Tube Co., Ltd. |