CN101476078A - Method for manufacturing super two-phase stainless steel large-sized sea water pump shaft - Google Patents
Method for manufacturing super two-phase stainless steel large-sized sea water pump shaft Download PDFInfo
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- CN101476078A CN101476078A CNA2009100461990A CN200910046199A CN101476078A CN 101476078 A CN101476078 A CN 101476078A CN A2009100461990 A CNA2009100461990 A CN A2009100461990A CN 200910046199 A CN200910046199 A CN 200910046199A CN 101476078 A CN101476078 A CN 101476078A
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- sea water
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000013535 sea water Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 17
- 239000010935 stainless steel Substances 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000007670 refining Methods 0.000 claims abstract description 9
- 238000010079 rubber tapping Methods 0.000 claims abstract description 6
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 5
- 238000005242 forging Methods 0.000 claims description 24
- 229910001039 duplex stainless steel Inorganic materials 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910019589 Cr—Fe Inorganic materials 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 2
- 150000002910 rare earth metals Chemical class 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 229910052736 halogen Inorganic materials 0.000 abstract description 6
- 150000002367 halogens Chemical class 0.000 abstract description 6
- 238000003723 Smelting Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000007872 degassing Methods 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 description 6
- 239000002893 slag Substances 0.000 description 5
- 229910000885 Dual-phase steel Inorganic materials 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 3
- 238000005261 decarburization Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000011027 product recovery Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 208000004141 microcephaly Diseases 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 241000024287 Areas Species 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- 229910005347 FeSi Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910003296 Ni-Mo Inorganic materials 0.000 description 1
- 241000139306 Platt Species 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- QQHSIRTYSFLSRM-UHFFFAOYSA-N alumanylidynechromium Chemical compound [Al].[Cr] QQHSIRTYSFLSRM-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical class CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Forging (AREA)
Abstract
The invention relates to smelting, press working and manufacturing and the like, is specially adapted to a method of manufacturing super diphasic stainless steel large-scale sea water pump shafts (multi-stepped shafts) having a performance of corrosion resistant of medium such as sea water, halogen and the like. The method comprises steps of tapping, refining operation, pouring into steel ingots, smithing, solution treating, and diphasic stainless steel water pump shaft obtaining in sequence, wherein, the refining operation comprises steps of vacuum oxygen blast and vacuum degasification in sequence; in the solution treating process, when the water pump shaft is heated to a temperature of 1000-1200 DEG C, the temperature is then reduced rapidly and after the solution treating process, the content of ferrite in the diphasic stainless steel water pump shaft is 45%-52%, and after the vacuum oxygen blast process, the temperature of molten steel is improved to 1700-1750 DEG C. The method has advantages that diphasic stainless steel large-scale sea water pump shafts produced by using the method have a good thermoplasticity, a high product yield, a performance of corrosion resistant of medium such as sea water, halogen and the like, and can satisfy the requirement of large-scale element manufacture.
Description
Technical field
The present invention relates to smelt and press working manufacturing class, be specially adapted to the manufacture method of the super two-phase stainless steel large-sized sea water pump shaft (step axle) of dielectric corrosions such as a kind of sea water resistance, halogen.
Background technology
The 00Cr25Ni7Mo3WCuN dual phase steel is the earliest by Britain Mather and the exploitation of Platt Ltd company, promptly occur at the mid-80 with the form of foundry goods, it has the advantage of high temperature resistant seawater and halogen-containing medium, gradually its development is developed into the forging property super-duplex stainless steel.
China is at operating modes such as urea, also developed similar NTKR-4 steel the eighties, and then improved molybdenum content again, produce the 00Cr25Ni7Mo3N duplex stainless steel, in recent years successfully be applied to parts such as seawater heat exchanger and hot brine propeller pump, the anti-local corrosion performance that has also proved the 00Cr25Ni7Mo3WCuN duplex stainless steel obviously be better than the 316L stainless steel and first, second in generation dual phase steel.Alloy825 and 904L alloy have been substituted in some Application Areass, as to catalyst regneration device of this dioctyl phthalate two formicester production usefulness etc.
But for a long time, so this steel grade fails to develop rapidly and the big obstacle extensively promoted is that its thermoplasticity is poor, the finished product recovery rate is low, and especially the manufacturing of large parts is difficult.Also there are two big difficult points in the production of super two-phase stainless steel large-sized sea water pump shaft, and the first is to the assurance of smelting operation, Composition Control and the structure of duplex stainless steel; It two is forgings of large-scale step axle.Because this steel grade is in hot procedure, the austenite of coexistence is different with the deformational behavior of ferritic phase mutually, the dynamic recovery when promptly the softening process of ferritic phase is by strain---belong to crystal grain and recover attitude; The softening process of austenite phase is by being higher than threshold value ∈
cDynamic recrystallization---belong to grain refining recrystallize attitude.
Summary of the invention
The objective of the invention is provides a kind of manufacture method of super two-phase stainless steel large-sized sea water pump shaft according to above-mentioned the deficiencies in the prior art part, and the water pump shaft thermoplasticity that this method is made is good, finished product recovery rate height, but dielectric corrosions such as sea water resistance, halogen.
The object of the invention realizes being finished by following technical scheme:
A kind of manufacture method of super two-phase stainless steel large-sized sea water pump shaft, the step that it is characterized in that this method comprises: tapping → refining → pour into steel ingot → forging → solution treatment → duplex stainless steel water pump shaft, wherein, refining comprises: vacuum oxygen → vacuum outgas; Lower the temperature rapidly when when described solution treatment this water pump shaft being heated to 1000～1200 ℃, the duplex stainless steel water pump shaft ferrite content after the solution treatment accounts for 45%～52%, and the molten steel temperature behind the vacuum oxygen is brought up to 1700～1750 ℃.
Advantage of the present invention is that the two-phase stainless steel large-sized sea water pump shaft thermoplasticity that adopts the inventive method to make is good, finished product recovery rate height, the manufacturing that especially can solve large parts, but dielectric corrosions such as sea water resistance, halogen.
Description of drawings
Accompanying drawing 1 is 00Cr25Ni7Mo3WCuN duplex stainless steel smelting technology schema of the present invention.
Accompanying drawing 2 is temperature-concentration section figure for Fe-Ni-Mo-N.
Embodiment
The present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
As Fig. 1 is the smelting technology flow process of 00Cr25Ni7Mo3WCuN duplex stainless steel: with furnace charge electric arc furnace fusing (C:0.8～1.5%, Cr:24%, Ni:7%, T:1580 ℃) → thick decarburization (C:0.3～0.5%, Cr:20～22.5%, Ni:6.5～7.0%, T:1650～1750 ℃) → reduction deoxidation (C:0.3～0.5%, Cr:23～24%, Ni:6.5～7.0%, T:1680～1700 ℃) → tapping → ladle slagging-off → vacuum oxygen (C :≤0.02%, Cr:22.5～23.5%, Ni:6.5～7.0%, T:1700～1750 ℃) → refrigerant, alloy material drops into (C :≤0.02%, Cr:23.5～25%, Ni:7.5%, T:1660～1680 ℃ → vacuum outgas (C :≤0.02%, Cr:24.5～25%, Ni:7.5%, T:1600～1650 ℃) → " the plum blossom ingot that pours into 28.
Can progressively be dissolved in the austenite mutually or change δ (high temperature ferrite) into for this steel grade σ the time as Fig. 2 greater than 950 ℃.High-temperature zone (greater than 1000 ℃) is cooling fast, does not produce the process that α changes the σ phase mutually into.The Fe-Ni-Mo-N of Fig. 2 is that the dice district is the forging suitable parameters among the temperature-concentration section figure.
Subordinate list 1 is that the 00Cr25Ni7Mo3WCuN duplex stainless steel is with phase transition temperature figure.
Subordinate list 1
| Specimen coding | Solid solubility temperature | Test point 1 | Test point 2 | Test point 3 | Test point 4 | Test point 5 | The equal average of σ |
| 1 | 800℃ | 42.0 | 40.8 | 41.7 | 42.1 | 41.1 | 41.2 |
| 2 | 900℃ | 29.1 | 28.4 | 26.5 | 28.0 | 25.3 | 27.5 |
| 3 | 1000℃ | 49.1 | 47.1 | 49.8 | 48.2 | 49.3 | 48.7 |
| 4 | 1100℃ | 49.2 | 50.4 | 51.3 | 51.6 | 47.9 | 50.1 |
| 5 | 1200℃ | 50.7 | 51.9 | 52.9 | 51.5 | 51.4 | 51.7 |
| 6 | 1300℃ | 54.2 | 56.2 | 54.1 | 55.3 | 51.9 | 54.3 |
Subordinate list 1 be depicted as the 00Cr25Ni7Mo3WCuN dual phase steel between 1000～1200 ℃ in the steel δ (high temperature ferritic phase) respectively account for mutually about 50% with γ, along with temperature rising γ phase amount has a declining tendency.Shown in the table 2, this steel is between 800～1000 ℃ simultaneously, and the two-phase ratio alters a great deal, and especially in 900 ℃ of zones, amount of ferrite changes the σ phase mutually into, seriously reduces the thermoplasticity of steel, causes the generation and the diffusion of crackle.
The Cr-Ni-Mo of charging stock for electric furnace joins foot substantially in the electrosmelting EAF process, and makes P≤0.03%; Furnace temperature reaches about 1580 ℃ and begins the preliminary decarburization of oxygen blast (making carbon content reduce to 0.3～0.5% by 0.8～1.5%) wherein, the vacuum oxygen time is 55～60min, molten steel temperature behind the vacuum oxygen is brought up to 1700～1750 ℃, insert the deoxidation of Al-Cr alloy, slag making simultaneously, desulfurization are characterized in need not making white slag, treat to tap wherein after most of Cr reduction in the slag, adjust earlier molten steel temperature refining period, accurate adjustment composition again, add before the tapping N-Cr-Fe wherein C content be not higher than 0.03%.Change the vacuum refinement of vacuum refinement VODC stove over to through ladle, vacuum tightness reaches 40～90mbar and can begin oxygen decarburization, oxygen amount 300～500M in stove
3/ hr, argon gas amount 3～5M
3/ hr, vacuum-oxygen decarbonizing is to≤0.025%; Adjust basal component content; Skim and add new slag (Fe-Si75) 7kg/T, CaO 10kg/T, CaF
22kg/T, FeSi 5kg/T, deoxidation to the slag FeO≤1.0%, desulfurization to≤0.01%; Vacuum carbon deoxidization, degassing vacuum tightness 2～5mbar, pumpdown time 6～10min, 1600～1700 ℃ of temperature; Carbon content during the cast steel ingot in the molten steel is controlled to be and is not higher than 0.02%, and temperature is selected unwarranted charge shape of the mouth as one speaks punching block for use at 1550～1600 ℃, adds the rare earth heat-generating agent simultaneously at the top.
Present embodiment super two-phase stainless steel large-sized sea water pump shaft heating in the forging is:
Blank is whole thermally equivalent when melting down heating, steel ingot heater temperature≤1200 ℃, and soaking time was no less than 4h when steel ingot heated at soaking pit, final forging temperature is not less than 950 ℃, opening the preceding lower anvil iron of going up of forging answers preheating to be not less than 100 ℃, send steel ingot to be not more than 60 seconds to the time on the hammer anvil from process furnace, forging ratio is not less than 4, best deflection 30～50%.
1000～1150 ℃ in optimal heat texturing temperature zone (1150 ℃ time the heat property turned round be 15 circles)
Subordinate list 2 is a 00Cr25Ni7Mo3WCuN duplex stainless steel deformation technique table
Subordinate list 2
| Fire | Temperature ℃ | Deformation requirements | Precaution |
| The head fire | Beginning forges: 1150 finish-forgings: 〉=1050 | Do not require deflection, only demand and do not ftracture.Have fine cracks promptly to stop, temperature arrives 1050 and promptly stops. | Forging hammer: whole process is patted fast bullet, and is stressed even, goes with a swing.Operating machine: duty is advanced, duty is moved back, duty is stood up, and a thrust surface only is subjected to a hammering. |
| Two fire | Beginning forges: 1150 finish-forgings: 1000 | Blanking: 530 * 1375mm (rising head is wanted Ex-all during crop end, and the cross section will smoothly not have burr) jumping-up: 1375 ↓ 650mm pulling: 650 → 1300mm | The forging stock temperature is wanted evenly, and distortion is wanted evenly, and diligent 90 ° are stood up.Discovery has fine cracks promptly to stop, and temperature is also promptly stopped for 1000 ℃. |
| Three fire | Beginning forges: 1180 finish-forgings: 1000 | Jumping-up: 1300 ↓ 650mm pulling: 450 * 2200mm is swaged into: anistree 435 * 2300mm presses the termination shoulder 150mm place | The forging stock temperature is wanted evenly, and distortion is wanted evenly, and diligent 90 ° are stood up.Discovery has fine cracks promptly to stop, and temperature arrives 1000 ℃ and also promptly stops. |
| Last fire | Beginning forges: 1150 finish-forgings: 〉=970 | Major part breaks into product: Φ 425 * 150mm microcephaly breaks into product: Φ 245 * 6670mm is round as a ball, alignment, correction size | The forging stock temperature is wanted evenly, and distortion is wanted evenly, and diligent 90 ° are stood up.Discovery has fine cracks promptly to stop, and temperature arrives 970 ℃ and promptly stops. |
The forging step is:
First fire: steel ingot blanking, head excision 20%, afterbody excision 10～15%; Do not pursue deflection, and stop forging temperature and be not less than 1050 ℃, progressively attitude is brilliant to be changed and not to ftracture to forging to require steel ingot as cast condition crystal grain.
Second fire: blanking 530 * 1375mm, jumping-up pull out 1300mm then to 650mm.
The 3rd fire: jumping-up is drawn into 450 * 2200mm to 650mm.Shoulder 150mm place is pressed in the termination.
Thereafter many fire:, beat Φ 245mm circular shaft with the clout pulling.
Final fire: major part Φ 425 * 150mm microcephaly Φ 245 * 6670mm and round as a ball, alignment, correction size.
Each feed in the pulling process is less than blank width, and greater than about half of sotck thinkness.Strike draught (monolateral) after at every turn sending to is less than feed, and the pulling process is followed the deformation sequence of " circle → side → circle " and carried out.
Subordinate list 3 is 00Cr25Ni7Mo3WCuN present embodiment composition and code requirement.
Subordinate list 3
| C | Si | Mn | P | S | Ni | Cr | Mo | N | Cu | W | |
| Code requirement | ≤ 0.03 | ≤ 1.0 | ≤ 1.0 | ≤ 0.03 | ≤ 0.01 | 6.0～ 8.0 | 24.0～ 26.0 | 3.0～ 4.0 | 02.0～ 0.30 | 0.50～ 1.00 | 0.50～ 1.00 |
| Embodiment 0707106 | 0.02 | 0.27 | 0.44 | 0.026 | 0.004 | 6.21 | 24.92 | 3.34 | 0.30 | 0.79 | 0.74 |
Annotate: PRE (mass)=Cr+3.3Mo+16N=40.74 (requiring 〉=40%)
Subordinate list 4 is 00Cr25Ni7Mo3WCuN present embodiment mechanical property and code requirement.
Subordinate list 4
| Test temperature (20 ℃) | Yield strength (MPa) | Tensile strength (MPa) | Elongation (%) | Hardness HB |
| Code requirement | ≥550 | ≥750 | ≥25 | ≤270 |
| Embodiment numbers 0707106-1 | 762 | 788 | 35.2 | 265.267.268 |
Claims (4)
1. the manufacture method of a super two-phase stainless steel large-sized sea water pump shaft, the step that it is characterized in that this method comprises: tapping → refining → pour into steel ingot → forging → solution treatment → duplex stainless steel water pump shaft, wherein, refining comprises: vacuum oxygen → vacuum outgas; Lower the temperature rapidly when when described solution treatment this water pump shaft being heated to 1000～1200 ℃, the duplex stainless steel water pump shaft ferrite content after the solution treatment accounts for 45%～52%, and the molten steel temperature behind the vacuum oxygen is brought up to 1700～1750 ℃.
2. according to the manufacture method of the described a kind of super two-phase stainless steel large-sized sea water pump shaft of claim 1, it is characterized in that being when refining, adjusting earlier molten steel temperature, accurate adjustment molten steel component again, add N-Cr-Fe before the tapping, wherein C content is not higher than 0.03%, temperature is selected unwarranted charge shape of the mouth as one speaks punching block for use at 1550～1600 ℃ when pouring into steel ingot, adds the rare earth heat-generating agent simultaneously at the top.
3. according to the manufacture method of the described a kind of super two-phase stainless steel large-sized sea water pump shaft of claim 1, first fire does not require deflection when it is characterized in that being to forge, and stops forging temperature and be not less than 1050 ℃; Blank is whole thermally equivalent when melting down heating, soaking time was no less than 4h when steel ingot heated at soaking pit, opened to go up lower anvil iron before forging and answer preheating to be not less than 100 ℃, sent steel ingot to be not more than 60 seconds to the time on the hammer anvil from process furnace, final forging temperature is not less than 950 ℃, and forging ratio is not less than 4.
4. according to the manufacture method of the described a kind of super two-phase stainless steel large-sized sea water pump shaft of claim 1, it is characterized in that being that the vacuum oxygen time is 55～60min, the carbon content during cast in the molten steel is not higher than 0.02%.
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| CN2009100461990A CN101476078B (en) | 2009-02-13 | 2009-02-13 | Method for manufacturing super two-phase stainless steel large-sized sea water pump shaft |
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|---|---|---|---|
| CN2009100461990A CN101476078B (en) | 2009-02-13 | 2009-02-13 | Method for manufacturing super two-phase stainless steel large-sized sea water pump shaft |
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| CN101476078B CN101476078B (en) | 2012-06-06 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102626769A (en) * | 2012-04-10 | 2012-08-08 | 遵义拓特铸锻有限公司 | Manufacturing process of pump body casting of super duplex stainless steel centrifugal pump |
| CN102989945A (en) * | 2012-08-22 | 2013-03-27 | 昌利锻造有限公司 | Processing method of forge piece pump shaft |
| CN103436816A (en) * | 2013-09-11 | 2013-12-11 | 武汉重工铸锻有限责任公司 | Manufacturing method of 1Cr18Ni9Ti stainless steel shaft forging |
| CN105018703A (en) * | 2015-07-28 | 2015-11-04 | 苏州市鑫渭阀门有限公司 | Solution treatment technology for high-pressure stainless steel pump |
| CN107309405A (en) * | 2017-06-06 | 2017-11-03 | 洛阳双瑞特种装备有限公司 | A kind of casting method of super-duplex stainless steel 5A material impellers |
| CN110396583A (en) * | 2019-09-06 | 2019-11-01 | 西京学院 | A kind of high strength martensitic/ferrite dual phase steel strength-toughening treatment process and dual phase steel |
| CN112809397A (en) * | 2020-04-26 | 2021-05-18 | 昆明嘉和科技股份有限公司 | Pump shaft machining device and method for high-temperature concentrated sulfuric acid submerged pump |
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2009
- 2009-02-13 CN CN2009100461990A patent/CN101476078B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102626769A (en) * | 2012-04-10 | 2012-08-08 | 遵义拓特铸锻有限公司 | Manufacturing process of pump body casting of super duplex stainless steel centrifugal pump |
| CN102626769B (en) * | 2012-04-10 | 2013-09-04 | 遵义拓特铸锻有限公司 | Manufacturing process of pump body casting of super duplex stainless steel centrifugal pump |
| CN102989945A (en) * | 2012-08-22 | 2013-03-27 | 昌利锻造有限公司 | Processing method of forge piece pump shaft |
| CN103436816A (en) * | 2013-09-11 | 2013-12-11 | 武汉重工铸锻有限责任公司 | Manufacturing method of 1Cr18Ni9Ti stainless steel shaft forging |
| CN103436816B (en) * | 2013-09-11 | 2016-01-27 | 武汉重工铸锻有限责任公司 | 1Cr18Ni9Ti stainless steel shaft process for manufacturing forging |
| CN105018703A (en) * | 2015-07-28 | 2015-11-04 | 苏州市鑫渭阀门有限公司 | Solution treatment technology for high-pressure stainless steel pump |
| CN107309405A (en) * | 2017-06-06 | 2017-11-03 | 洛阳双瑞特种装备有限公司 | A kind of casting method of super-duplex stainless steel 5A material impellers |
| CN107309405B (en) * | 2017-06-06 | 2018-12-21 | 洛阳双瑞特种装备有限公司 | A kind of casting method of super-duplex stainless steel 5A material impeller |
| CN110396583A (en) * | 2019-09-06 | 2019-11-01 | 西京学院 | A kind of high strength martensitic/ferrite dual phase steel strength-toughening treatment process and dual phase steel |
| CN112809397A (en) * | 2020-04-26 | 2021-05-18 | 昆明嘉和科技股份有限公司 | Pump shaft machining device and method for high-temperature concentrated sulfuric acid submerged pump |
| CN113664133A (en) * | 2021-08-27 | 2021-11-19 | 中航上大高温合金材料股份有限公司 | Forging method for improving low-temperature impact property of duplex stainless steel |
| CN113664133B (en) * | 2021-08-27 | 2023-10-27 | 中航上大高温合金材料股份有限公司 | Forging method for improving low-temperature impact performance of duplex stainless steel |
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| CN101476078B (en) | 2012-06-06 |
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