CN106676391A - Main shaft forge piece of large-sized water-turbine generator set - Google Patents
Main shaft forge piece of large-sized water-turbine generator set Download PDFInfo
- Publication number
- CN106676391A CN106676391A CN201611141518.2A CN201611141518A CN106676391A CN 106676391 A CN106676391 A CN 106676391A CN 201611141518 A CN201611141518 A CN 201611141518A CN 106676391 A CN106676391 A CN 106676391A
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Classifications
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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
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The invention discloses a main shaft forge piece of a large-sized water-turbine generator set. Molten steel smelting components for casting a forged steel ingot and components of the finished forge piece are composed of, by mass fraction, the following components: less than or equal to 0.22% and not equal to 0% of C, less than or equal to 0.35% and not equal to 0% of Si, 1.00-1.35% of Mn, less than or equal to 0.025% and not equal to 0% of P, less than or equal to 0.01% and not equal to 0% of S, less than or equal to 0.25% and not equal to 0% of Cr, less than or equal to 0.90% and not equal to 0% of Ni, less than or equal to 0.08% and not equal to 0% of Mo, less than or equal to 0.05% and not equal to 0% of Cu, less than or equal to 0.52% of carbon equivalent, and the balance iron and inevitable impurities. According to the main shaft forge piece of the large large-sized water-turbine generator set, the yield strength is greater than or equal to 265 MPa, the tensile strength is greater than or equal to 515 MPa, the elongation rate after fracture is greater than or equal to 21%, the section shrinkage rate is greater than or equal to 35%, the impact absorption energy is greater than or equal to 30 J, and cold bending (d = 40 mm and alpha = 180 degrees) is free of cracks.
Description
Technical field
The present invention relates to a kind of Large Hydroelectric Set main shaft forging.
Background technology
Spindle of hydroelectric generator set forging is the crucial load bearing component of turbine-generator units, and its quality is directly connected to unit
The safety and reliability of operation.Large Hydroelectric Set main shaft forge piece size is big, weight big, forging and forming technology difficulty
Greatly, the defects such as segregation, crackle are also easy to produce, quality risk is very high.The present invention be primarily directed to the hydraulic turbine more than 500MW levels,
Hydrogenerator main shaft forging.
The content of the invention
It is an object of the invention to provide a kind of excellent performance and the Large Hydroelectric Set main shaft forging of stable performance.
In order to reach above-mentioned technique effect, the present invention takes technical scheme below：
A kind of Large Hydroelectric Set main shaft forging, pours into a mould the molten steel composition and forging finished product composition of forging steel ingot
It is made up of the component of following mass fractions：
Carbon≤0.22%, and ≠ 0；
Silicon≤0.35%, and ≠ 0；
Manganese：1.00~1.35%；
Phosphorus≤0.025%, and ≠ 0；
Sulfur≤0.01%, and ≠ 0；
Chromium≤0.25%, and ≠ 0；
Nickel≤0.90%, and ≠ 0；
Molybdenum≤0.08%, and ≠ 0；
Copper≤0.05%, and ≠ 0；
Carbon equivalent≤0.52%,
Wherein carbon equivalent Ceq=C+Mn/6+ (Cr+Mo+V)/5+ (Ni+Cu)/15；
Balance of ferrum and inevitable impurity.
Further technical scheme is, described Large Hydroelectric Set main shaft forging >=80t；Diameter >=
3000mm, length >=5000mm.If certain power station main shaft forging's block dimension is Φ 4000 × Φ, 2520 × H7442mm, net weight 110t；Certain
Power station main shaft forging's block dimension is Φ 3500 × Φ, 3200 × H5900mm, net weight about 124t.
Further technical scheme is, during the thickness≤200mm of main shaft forging, yield strength >=265MPa；Tensile strength
≥515MPa；Elongation after fracture >=24%；The contraction percentage of area >=40%；Impact absorbing energy >=30J；Clod wash (d=40mm, α=
180°)：Flawless；
During thickness≤the 300mm of 200mm ＜ main shaft forging, yield strength >=265MPa；Tensile strength >=515MPa；Have no progeny
Percentage elongation >=22%；The contraction percentage of area >=37%；Impact absorbing energy >=30J；Clod wash (d=40mm, α=180 °)：Flawless；
During thickness≤the 500mm of 300mm ＜ main shaft forging, yield strength >=265MPa；Tensile strength >=515MPa；Have no progeny
Percentage elongation >=21%；The contraction percentage of area >=35%；Impact absorbing energy >=30J；Clod wash (d=40mm, α=180 °)：Flawless.
Further technical scheme is that Large Hydroelectric Set main shaft forging is to carry out ultrasound wave spy to main shaft forging
Wound (UT), magnetic powder inspection (MT) or liquid penetrant examination (PT) and visually Non-Destructive Testing, detection project and the acceptance requirement such as (VT)
Meet following table regulation.
The present invention compared with prior art, with following beneficial effect：
Yield strength >=the 265MPa of Large Hydroelectric Set main shaft forging；Tensile strength >=515MPa；Have no progeny elongation
Rate >=21%；The contraction percentage of area >=35%；Impact absorbing energy >=30J；Clod wash (d=40mm, α=180 °)：Flawless.
Description of the drawings
Fig. 1 is axle body I forging sample position schematic diagram；
Fig. 2 is axle body II forging sample position schematic diagram；
Fig. 3 is flange I forging sample position schematic diagram；
Fig. 4 is flange II forging sample position schematic diagram.
Specific embodiment
With reference to embodiments of the invention, the invention will be further elaborated.
1st, the manufacturing step of Large Hydroelectric Set main shaft forging is as follows：
1.1 smelt：Forging steel ingot adds vacuum pouring after external refining using electric furnace smelting.
1.2 forging：The mouth of a river of steel ingot, rising head end should have enough resection；Forge having on the forging press of enough abilities,
Forging whole cross section is set to obtain sufficient plastic deformation, forging ratio is more than 3.5, makes the shape and size of the close finished product of forging, forges
Part should overlap well with the centrage of steel ingot.
1.3 property heat treatment：Quenched or normalizing plus temper are carried out after forging process for fuel, to ensure that it is uniform that forging is obtained
Tissue and performance, temperature is not less than 600 DEG C.
1.4 Non-Destructive Testing：Respectively ultrasound wave is carried out to the different detection zones of main shaft forging on different states and opportunity
Flaw detection (UT), magnetic powder inspection (MT) or liquid penetrant examination (PT) and the visually Non-Destructive Testing such as (VT).
1.5 rewelding
1.6 groups of welderings：Before welding, physics and chemistry, flaw detection and dimension control are carried out to forging (or steel plate), selected and the equal power of forging
Learn the wlding of performance.
Using narrow-clearance submerged arc welding.
Stress relief annealing process, annealing temperature preferably less than property heat treatment temperature 30 DEG C~50 should be carried out after welding
DEG C, and must not be higher than 580 DEG C.
Non-Destructive Testing is carried out to welded seam area and its heat-affected zone.
2nd, inspection rule and test method
2.1 sample time：Sample after forging performance heat treatment.
2.2 sample position, size and quantity
2.2.1 forging and whole section of forging are segmented
2.2.1.1 Fig. 1-4 is seen in sample position, it is stipulated that as follows：
A) as forging wall thickness≤180mm, sample longitudinal center line is at forging wall thickness 1/2；As forging wall thickness ＞ 180mm
When, cylindrical (and inner circle) surface distance L >=90mm of sample axial centre line-spacing forging；
B) sample radial center line-spacing forging end face distance L >=90mm；
C) axial sample is allowed in bolt joint hole jacking.
2.2.1.2 specimen size and quantity are as shown in 1-4 and table 1.
Table 1 is segmented forging and whole section of forging sample quantities, pilot project and quantity
2.3 chemical composition analysis
Molten steel to pouring into a mould forging steel ingot carries out melting chemical composition analysis and carries out chemical composition analysis to forging finished product.
Chemical composition is analyzed and sampled on mechanical property sample, should be met GB/T 20066 and be specified.Chemical composition analysis press GB/T
223rd, the regulations of GB/T 4336 are performed.The molten steel component analyses of cast forging steel ingot and the forging finished product component analyses such as institute of table 2
Show.
The chemical composition of table 2
2.4 mechanical property test
2.4.1 tension test is carried out by the regulations of GB/T 228.1.
2.4.2 impact test is carried out by the regulations of GB/T 229.
2.4.3 bend specimen sectional dimension be 13mm × 25mm, length >=200mm, chamfer radius≤2mm, rough surface
Degree Ra values reach 0.8 μm.Bend test is carried out by the regulations of GB/T 232.
The data of mechanical of forging is as shown in table 3.
The 20MnSX forging mechanical properties of table 3
2.5 Non-Destructive Testing
Respectively ultrasonic examination (UT), magnetic powder are carried out to the different detection zones of main shaft forging on different states and opportunity
Flaw detection (MT) or liquid penetrant examination (PT) and the visually Non-Destructive Testing such as (VT), detection project and acceptance requirement meet table 4 and specify.
The Non-Destructive Testing of table 4
Embodiment 1：
The molten steel of cast forging steel ingot carries out melting chemical composition analysis and carries out chemical composition analysis such as to forging finished product
Under：Carbon 0.19%, silicon 0.28%, manganese 1.27%, phosphorus 0.01%, sulfur 0.007%, chromium 0.22%, nickel 0.35%, molybdenum 0.06%,
Copper 0.04%, balance of ferrum and inevitable impurity.Power station main shaft forging's block dimension is Φ 3500 × Φ, 3200 × H5900mm,
Net weight about 124t, corresponding mechanical property is yield strength 347MPa, and tensile strength 545MPa, elongation after fracture 29.5% breaks
Face shrinkage factor 73%, impact absorbing energy 116J.
Embodiment 2：
The molten steel of cast forging steel ingot carries out melting chemical composition analysis and carries out chemical composition analysis such as to forging finished product
Under：Carbon 0.21%, silicon 0.29%, manganese 1.21%, phosphorus 0.016%, sulfur 0.009%, chromium 0.22%, nickel 0.28%, molybdenum 0.05%,
Copper 0.03%, balance of ferrum and inevitable impurity.Power station main shaft forging's block dimension is Φ 3500 × Φ, 3200 × H5900mm,
Net weight about 124t, corresponding mechanical property be yield strength 340MPa, tensile strength 544MPa, elongation after fracture 29%, section
Shrinkage factor 70%, impact absorbing energy 82J.
Embodiment 3：
The molten steel of cast forging steel ingot carries out melting chemical composition analysis and carries out chemical composition analysis such as to forging finished product
Under：Carbon 0.21%, silicon 0.23%, manganese 1.25%, phosphorus 0.011%, sulfur 0.005%, chromium 0.23%, nickel 0.29%, molybdenum 0.05%,
Copper 0.03%, balance of ferrum and inevitable impurity.Power station main shaft forging's block dimension is Φ 3500 × Φ, 3200 × H5900mm,
Net weight about 124t, corresponding mechanical property be yield strength 390MPa, tensile strength 572MPa, elongation after fracture 27%, section
Shrinkage factor 69%, impact absorbing energy 104J.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this
Bright preferably embodiment, embodiments of the present invention are simultaneously not restricted to the described embodiments, it should be appreciated that people in the art
Member can be designed that a lot of other modification and embodiment, and these modifications and embodiment will fall in principle disclosed in the present application
Within scope and spirit.
Claims (4)
1. a kind of Large Hydroelectric Set main shaft forging, it is characterised in that the molten steel composition and forging of cast forging steel ingot
Finished product composition is made up of the component of following mass fractions：
Carbon≤0.22%, and ≠ 0；
Silicon≤0.35%, and ≠ 0；
Manganese：1.00~1.35%；
Phosphorus≤0.025%, and ≠ 0；
Sulfur≤0.01%, and ≠ 0；
Chromium≤0.25%, and ≠ 0；
Nickel≤0.90%, and ≠ 0；
Molybdenum≤0.08%, and ≠ 0；
Copper≤0.05%, and ≠ 0；
Carbon equivalent≤0.52%,
Wherein carbon equivalent Ceq=C+Mn/6+ (Cr+Mo+V)/5+ (Ni+Cu)/15；
Balance of ferrum and inevitable impurity.
2. Large Hydroelectric Set main shaft forging according to claim 1, it is characterised in that described large-sized water turbine is sent out
Weight >=the 80t of group of motors main shaft forging；Diameter >=3000mm, length >=5000mm.
3. Large Hydroelectric Set main shaft forging according to claim 1, it is characterised in that the thickness of main shaft forging≤
During 200mm, yield strength >=265MPa；Tensile strength >=515MPa；Elongation after fracture >=24%；The contraction percentage of area >=40%；
Impact absorbing energy >=30J；Clod wash (d=40mm, α=180 °)：Flawless；
During thickness≤the 300mm of 200mm ＜ main shaft forging, yield strength >=265MPa；Tensile strength >=515MPa；Have no progeny elongation
Rate >=22%；The contraction percentage of area >=37%；Impact absorbing energy >=30J；Clod wash (d=40mm, α=180 °)：Flawless；
During thickness≤the 500mm of 300mm ＜ main shaft forging, yield strength >=265MPa；Tensile strength >=515MPa；Have no progeny elongation
Rate >=21%；The contraction percentage of area >=35%；Impact absorbing energy >=30J；Clod wash (d=40mm, α=180 °)：Flawless.
4. Large Hydroelectric Set main shaft forging according to claim 1, it is characterised in that main shaft forging is surpassed
Sonic flaw detection, magnetic powder inspection or liquid penetrant examination and visual Non-Destructive Testing, detection project and acceptance requirement meet following table regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611141518.2A CN106676391A (en) | 2016-12-12 | 2016-12-12 | Main shaft forge piece of large-sized water-turbine generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611141518.2A CN106676391A (en) | 2016-12-12 | 2016-12-12 | Main shaft forge piece of large-sized water-turbine generator set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106676391A true CN106676391A (en) | 2017-05-17 |
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ID=58868226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611141518.2A Pending CN106676391A (en) | 2016-12-12 | 2016-12-12 | Main shaft forge piece of large-sized water-turbine generator set |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108149154A (en) * | 2017-12-01 | 2018-06-12 | 宝鼎科技股份有限公司 | High-voltage motor highly stressed rotor forging shaft and heat treatment processing method |
| CN109001106A (en) * | 2018-06-05 | 2018-12-14 | 长江三峡技术经济发展有限公司 | A kind of high-strength hot-rolled energy efficient wire examination method of magnetic yoke steel plate impact absorbing of hydrogenerator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5019180A (en) * | 1988-09-16 | 1991-05-28 | Mannesmann Aktiengesellschaft | Method of manufacturing of high-strength seamless steel tubes |
| CN101398165A (en) * | 2008-10-30 | 2009-04-01 | 贵州航天新力铸锻有限责任公司 | Major vapour inlet/outlet joint pipe for nuclear plant steam generator and forging method thereof |
| CN102021488A (en) * | 2010-11-30 | 2011-04-20 | 攀钢集团钢铁钒钛股份有限公司 | Steel for nuclear-island seamless steel tube and production method thereof |
-
2016
- 2016-12-12 CN CN201611141518.2A patent/CN106676391A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5019180A (en) * | 1988-09-16 | 1991-05-28 | Mannesmann Aktiengesellschaft | Method of manufacturing of high-strength seamless steel tubes |
| CN101398165A (en) * | 2008-10-30 | 2009-04-01 | 贵州航天新力铸锻有限责任公司 | Major vapour inlet/outlet joint pipe for nuclear plant steam generator and forging method thereof |
| CN102021488A (en) * | 2010-11-30 | 2011-04-20 | 攀钢集团钢铁钒钛股份有限公司 | Steel for nuclear-island seamless steel tube and production method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108149154A (en) * | 2017-12-01 | 2018-06-12 | 宝鼎科技股份有限公司 | High-voltage motor highly stressed rotor forging shaft and heat treatment processing method |
| CN108149154B (en) * | 2017-12-01 | 2019-12-10 | 宝鼎科技股份有限公司 | High-strength rotor shaft forging for high-voltage motor and heat treatment processing method |
| CN109001106A (en) * | 2018-06-05 | 2018-12-14 | 长江三峡技术经济发展有限公司 | A kind of high-strength hot-rolled energy efficient wire examination method of magnetic yoke steel plate impact absorbing of hydrogenerator |
| CN109001106B (en) * | 2018-06-05 | 2022-04-22 | 长江三峡技术经济发展有限公司 | Method for effectively checking impact absorption energy of high-strength hot-rolled magnetic yoke steel plate of hydraulic generator |
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