CN105463327A - Mixed flow water turbine volute of large hydropower station - Google Patents
Mixed flow water turbine volute of large hydropower station Download PDFInfo
- Publication number
- CN105463327A CN105463327A CN201510913390.6A CN201510913390A CN105463327A CN 105463327 A CN105463327 A CN 105463327A CN 201510913390 A CN201510913390 A CN 201510913390A CN 105463327 A CN105463327 A CN 105463327A
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- Prior art keywords
- hydropower station
- large sized
- turbine volute
- francis turbine
- volute
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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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing 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
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Hydraulic Turbines (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to a mixed flow water turbine volute of a large hydropower station, and belongs to the field of hydroelectric power generation. Materials of the volute of the large hydropower station are improved, so that the strength and the anti-ballistic work of the volute are greatly improved, and therefore the durability of a hydroelectric power generation device is totally promoted.
Description
Technical field
The invention belongs to water generating field, especially equipment for hydroelectric station, particularly relate to a kind of large sized hydropower station Francis turbine volute.
Background technology
Existing power station Francis turbine volute is in order to reach the object of lighting; much all adopt aluminium alloy; but although current technology has increased substantially the intensity of aluminium alloy; but because water turbine volute often can be subject to larger external impacts; even if the aluminium alloy of high strength can not reach stand a large amount of long-term requirement of strength of impacting; therefore for large sized hydropower station, need to sacrifice lighting and hardening strength.Simultaneously due to the requirement of the necessary demand fulfillment erosion resistance of its Working environment.What have a lot of power station to adopt at present is that the steel plate of 600MPa level is prepared from, and is therefore badly in need of developing a kind of high strength and the Francis turbine volute with excellent toughness and welding property.
Summary of the invention
The object of the invention is to propose a kind of large sized hydropower station Francis turbine volute.
Realize especially by following technique means:
Large sized hydropower station Francis turbine volute, the chemical composition of described volute material is by weight percentage: C:0.08 ~ 0.11%, Si:0.23 ~ 0.35%, Mn:0.8 ~ 1.2%, Nb:0.02 ~ 0.08%, Ti:0.02 ~ 0.06%, Ni:0.2 ~ 0.6%, Alt:0.05 ~ 0.10%, V:0.03 ~ 0.08%, Cr:0.5 ~ 1.1%, Mo:0.38 ~ 0.60%, Cu:0.2 ~ 0.5%, B:0.001 ~ 0.003%, RE:0.02 ~ 0.06%, P<0.02%, S<0.01%, N<0.001%, surplus is Fe and inevitable impurity.
By weight percentage, Ce is 12 ~ 18%, Pr is 16 ~ 23% to its middle-weight rare earths RE, and surplus is La and inevitable impurity.
In the microtexture of described volute, the volume percent of tempered sorbite+tempered martensite is 82 ~ 90%, wherein in the cross section of described large sized hydropower station Francis turbine volute, 2mm below from surface to surface, the area occupation ratio of tempered sorbite+tempered martensite is 1.1 ~ 1.3 times of center; Described center is the area of each 1mm of the inside external expansion of cross section dotted line.
The room-temperature yield strength of described large sized hydropower station Francis turbine volute is 730 ~ 790MPa, and tensile strength is 890 ~ 980MPa, and section elongation is 16 ~ 20%, and-30 DEG C of ballistic works are 52 ~ 62J.
Described large sized hydropower station Francis turbine volute carries out following heat treatment step after shaping:
(1) insert in quenching furnance by large sized hydropower station Francis turbine volute work in-process, be heated to 910 ~ 950 DEG C (preferably 930 DEG C) with stove, insulation 30 ~ 50min, then inserts in quenching oil to hang out after being chilled to 290 ~ 310 DEG C and carries out water-spraying control to room temperature.
(2) work in-process after quenching are placed in deep cooling box and are cooled to-80 ~-120 DEG C, go out deep cooling box after keeping this temperature 25 ~ 35min and return to room temperature.
(3) be placed in tempering stove by the work in-process after deep cooling, be heated to 560 ~ 650 DEG C with stove, air cooling of coming out of the stove after insulation 20 ~ 50min, obtains large sized hydropower station Francis turbine volute finished product.
effect of the present invention is:
1, by improving the component concentration of large sized hydropower station Francis turbine volute, especially the reasonable restriction of Ti content and the reasonable interpolation of RE and content reasonably combined, to make in microtexture TiC particulate can Dispersed precipitate, thus effective inhibiting grain growth, with the addition of RE, the crystal grain with the use of refinement, makes its over-all properties obtain and significantly improves simultaneously.
2, by rationally limiting its microtexture, the intensity of the volute surface when not increasing expensive element is enhanced, and overall toughness improves.
3, with the coordinating of specific heat treatment system after rationally being limited by component concentration, volute intensity is strengthened greatly, and especially quench cooled adopts two sections of processes, makes surface intensity more be strengthened and ensure that welding property.
Embodiment
embodiment 1
Large sized hydropower station Francis turbine volute, the chemical composition of described volute material is by weight percentage: C:0.09%, Si:0.28%, Mn:0.9%, Nb:0.06%, Ti:0.03%, Ni:0.5%, Alt:0.08%, V:0.05%, Cr:0.8%, Mo:0.51%, Cu:0.3%, B:0.002%, RE:0.03%, P:0.002%, S:0.002%, N:0.0003%, surplus is Fe and inevitable impurity.
By weight percentage, Ce is 16%, Pr is 18% to its middle-weight rare earths RE, and surplus is La and inevitable impurity.
In the microtexture of described volute, the volume percent of tempered sorbite+tempered martensite is 88%, wherein in the cross section of described large sized hydropower station Francis turbine volute, 2mm below from surface to surface, the area occupation ratio of tempered sorbite+tempered martensite is 1.2 times of center; Described center is the area of each 1mm of the inside external expansion of cross section dotted line.
The room-temperature yield strength of described large sized hydropower station Francis turbine volute is 780MPa, and tensile strength is 910MPa, and section elongation is 18%, and-30 DEG C of ballistic works are 58J.
embodiment 2
Large sized hydropower station Francis turbine volute, the chemical composition of described volute material is by weight percentage: C:0.09%, Si:0.29%, Mn:0.9%, Nb:0.05%, Ti:0.05%, Ni:0.5%, Alt:0.08%, V:0.06%, Cr:1.0%, Mo:0.51%, Cu:0.3%, B:0.002%, RE:0.03%, P:0.001%, S:0.005%, N:0.0008%, surplus is Fe and inevitable impurity.
By weight percentage, Ce is 16%, Pr is 18% to its middle-weight rare earths RE, and surplus is La and inevitable impurity.
In the microtexture of described volute, the volume percent of tempered sorbite+tempered martensite is 86%, wherein in the cross section of described large sized hydropower station Francis turbine volute, 2mm below from surface to surface, the area occupation ratio of tempered sorbite+tempered martensite is 1.15 times of center; Described center is the area of each 1mm of the inside external expansion of cross section dotted line.
The room-temperature yield strength of described large sized hydropower station Francis turbine volute is 780MPa, and tensile strength is 898MPa, and section elongation is 18%, and-30 DEG C of ballistic works are 58J.
Described large sized hydropower station Francis turbine volute carries out following heat treatment step after shaping:
(1) insert in quenching furnance by large sized hydropower station Francis turbine volute work in-process, be heated to 930 DEG C with stove, insulation 38min, then inserts in quenching oil to hang out after being chilled to 300 DEG C and carries out water-spraying control to room temperature.
(2) work in-process after quenching are placed in deep cooling box and are cooled to-92 DEG C, go out deep cooling box after keeping this temperature 28min and return to room temperature.
(3) be placed in tempering stove by the work in-process after deep cooling, be heated to 582 DEG C with stove, air cooling of coming out of the stove after insulation 38min, obtains large sized hydropower station Francis turbine volute finished product.
embodiment 3
The large sized hydropower station Francis turbine volute of composition described in embodiment 1 carries out following heat treatment step after shaping:
(1) insert in quenching furnance by large sized hydropower station Francis turbine volute work in-process, be heated to 920 DEG C with stove, insulation 39min, then inserts in quenching oil to hang out after being chilled to 298 DEG C and carries out water-spraying control to room temperature.
(2) work in-process after quenching are placed in deep cooling box and are cooled to-102 DEG C, go out deep cooling box after keeping this temperature 28min and return to room temperature.
(3) be placed in tempering stove by the work in-process after deep cooling, be heated to 582 DEG C with stove, air cooling of coming out of the stove after insulation 32min, obtains large sized hydropower station Francis turbine volute finished product.
Claims (3)
1. large sized hydropower station Francis turbine volute, it is characterized in that, the chemical composition of described volute material is by weight percentage: C:0.08 ~ 0.11%, Si:0.23 ~ 0.35%, Mn:0.8 ~ 1.2%, Nb:0.02 ~ 0.08%, Ti:0.02 ~ 0.06%, Ni:0.2 ~ 0.6%, Alt:0.05 ~ 0.10%, V:0.03 ~ 0.08%, Cr:0.5 ~ 1.1%, Mo:0.38 ~ 0.60%, Cu:0.2 ~ 0.5%, B:0.001 ~ 0.003%, RE:0.02 ~ 0.06%, P<0.02%, S<0.01%, N<0.001%, surplus is Fe and inevitable impurity,
In the microtexture of described volute, the volume percent of tempered sorbite+tempered martensite is 82 ~ 90%, wherein in the cross section of described large sized hydropower station Francis turbine volute, 2mm below from surface to surface, the area occupation ratio of tempered sorbite+tempered martensite is 1.1 ~ 1.3 times of center; Described center is the area of each 1mm of the inside external expansion of cross section dotted line.
2. large sized hydropower station Francis turbine volute according to claim 1, it is characterized in that, the room-temperature yield strength of described large sized hydropower station Francis turbine volute is 730 ~ 790MPa, and tensile strength is 890 ~ 980MPa, section elongation is 16 ~ 20%, and-30 DEG C of ballistic works are 52 ~ 62J.
3. large sized hydropower station Francis turbine volute according to claim 1 and 2, is characterized in that, described large sized hydropower station Francis turbine volute carries out following heat treatment step after shaping:
(1) insert in quenching furnance by large sized hydropower station Francis turbine volute work in-process, be heated to 910 ~ 950 DEG C (preferably 920 ~ 930 DEG C) with stove, insulation 30 ~ 50min, then inserts in quenching oil to hang out after being chilled to 290 ~ 310 DEG C and carries out water-spraying control to room temperature;
(2) work in-process after quenching are placed in deep cooling box and are cooled to-80 ~-120 DEG C, go out deep cooling box after keeping this temperature 25 ~ 35min and return to room temperature;
(3) be placed in tempering stove by the work in-process after deep cooling, be heated to 560 ~ 650 DEG C with stove, air cooling of coming out of the stove after insulation 20 ~ 50min, obtains large sized hydropower station Francis turbine volute finished product.
Priority Applications (1)
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CN201510913390.6A CN105463327A (en) | 2015-12-12 | 2015-12-12 | Mixed flow water turbine volute of large hydropower station |
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CN201510913390.6A CN105463327A (en) | 2015-12-12 | 2015-12-12 | Mixed flow water turbine volute of large hydropower station |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106119665A (en) * | 2016-06-24 | 2016-11-16 | 国网安徽省电力公司黄山供电公司 | A kind of water wheels material of TRT based on water-energy generating electricity and preparation method thereof |
CN106522159A (en) * | 2016-12-02 | 2017-03-22 | 郭策 | High-efficiency durable flood prevention levee |
CN106756548A (en) * | 2016-12-14 | 2017-05-31 | 郭策 | A kind of preparation method of flood bank |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5635754A (en) * | 1979-08-29 | 1981-04-08 | Daido Steel Co Ltd | Low temperature turbine blade steel and its heat treatment |
CN101258256A (en) * | 2005-09-06 | 2008-09-03 | 住友金属工业株式会社 | Low alloy steel |
CN104532148A (en) * | 2014-12-10 | 2015-04-22 | 南京钢铁股份有限公司 | 800MPa grade low-welding crack sensitive tempering type hydroelectric steel plate |
CN105063321A (en) * | 2015-09-26 | 2015-11-18 | 郭策 | Preparation method of high-strength scaffold connecting piece |
-
2015
- 2015-12-12 CN CN201510913390.6A patent/CN105463327A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5635754A (en) * | 1979-08-29 | 1981-04-08 | Daido Steel Co Ltd | Low temperature turbine blade steel and its heat treatment |
CN101258256A (en) * | 2005-09-06 | 2008-09-03 | 住友金属工业株式会社 | Low alloy steel |
CN104532148A (en) * | 2014-12-10 | 2015-04-22 | 南京钢铁股份有限公司 | 800MPa grade low-welding crack sensitive tempering type hydroelectric steel plate |
CN105063321A (en) * | 2015-09-26 | 2015-11-18 | 郭策 | Preparation method of high-strength scaffold connecting piece |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106119665A (en) * | 2016-06-24 | 2016-11-16 | 国网安徽省电力公司黄山供电公司 | A kind of water wheels material of TRT based on water-energy generating electricity and preparation method thereof |
CN106522159A (en) * | 2016-12-02 | 2017-03-22 | 郭策 | High-efficiency durable flood prevention levee |
CN106756548A (en) * | 2016-12-14 | 2017-05-31 | 郭策 | A kind of preparation method of flood bank |
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