CN105463327A - Mixed flow water turbine volute of large hydropower station - Google Patents

Mixed flow water turbine volute of large hydropower station Download PDF

Info

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
Authority
CN
China
Prior art keywords
hydropower station
large sized
turbine volute
francis turbine
volute
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510913390.6A
Other languages
Chinese (zh)
Inventor
郭策
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201510913390.6A priority Critical patent/CN105463327A/en
Publication of CN105463327A publication Critical patent/CN105463327A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/08Ferrous alloys, e.g. steel alloys containing nickel
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D6/00Heat treatment of ferrous alloys
    • C21D6/04Hardening by cooling below 0 degrees Celsius
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/005Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/12Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/16Ferrous alloys, e.g. steel alloys containing copper
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/008Martensite

Landscapes

  • 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

Large sized hydropower station Francis turbine volute
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.
CN201510913390.6A 2015-12-12 2015-12-12 Mixed flow water turbine volute of large hydropower station Pending CN105463327A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510913390.6A CN105463327A (en) 2015-12-12 2015-12-12 Mixed flow water turbine volute of large hydropower station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510913390.6A CN105463327A (en) 2015-12-12 2015-12-12 Mixed flow water turbine volute of large hydropower station

Publications (1)

Publication Number Publication Date
CN105463327A true CN105463327A (en) 2016-04-06

Family

ID=55601479

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510913390.6A Pending CN105463327A (en) 2015-12-12 2015-12-12 Mixed flow water turbine volute of large hydropower station

Country Status (1)

Country Link
CN (1) CN105463327A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
CN103361547B (en) Production method of ultrahigh-strength steel plate for cold forming and steel plate
KR102222958B1 (en) High-strength ship steel with excellent low-temperature toughness and its one-gang multi-stage heat treatment process
KR102459261B1 (en) Method for producing a high strength steel sheet having improved strength and formability and obtained sheet
CN102605287B (en) Steel for high-ductility anti-seismic structure with yield ratio smaller than or equal to 0.70 and production method of steel
CN106435406B (en) A kind of Millettia pachycarpa weather-resistant steel plate and its manufacturing method
CN104451421B (en) High-strength high-toughness bimetallic strip saw blade back steel and preparation method thereof
AU2013375523B2 (en) High strength steel sheet and manufacturing method therefor
CN103484768B (en) The high-strength engineering steel plate of a kind of length &gt;=30m and production method
CN102719753A (en) Low-yield-ratio high-strength steel plate and manufacturing method thereof
CN102758145A (en) Thick plate used for highly weather resistant structure with low compression ratio and production method thereof
CN102851615A (en) Tensile strength 800 MPa-grade low-yield-ratio structural steel plate and manufacturing method thereof
CN106222544A (en) Annular forging piece and heat treatment method thereof
CN103938070A (en) Steel plate and preparation method thereof
CN106636943A (en) Thin-specification high-strength pipeline steel with ductility A 50.8 of not less than 48% and production method thereof
CN103866203A (en) Seamless steel pipe for large-aperture high-strength bridge and TMCP production method thereof
CN103014520A (en) F+P+B type low-yield-ratio and high-strength medium steel plate and production method thereof
CN105463327A (en) Mixed flow water turbine volute of large hydropower station
CN104532147A (en) S460G2+QT steel plate for fixed offshore platform and production method of steel plate
CN104294161A (en) High-temperature-resistant free-cutting high-strength steel
CN104342600B (en) Medium-thickness steel plate for non-normalized bridge and preparation method thereof
CN104313468A (en) Steel plate for 460MPa grade low-alloy high-strength structure and production method of steel plate
CN103882294A (en) Ni-saving type low-temperature steel plate and preparation method thereof
CN104745946A (en) Preparation method of air-cooling lower bainite/martensite complex-phase wear resistant cast steel
CN104099515B (en) A kind of steel, its heat treatment steel formed and manufacture method thereof
CN103114186B (en) Control cooling method of easy-welding high-performance steel plate

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20160406

RJ01 Rejection of invention patent application after publication