CN105349906A - Centrifugal casting method of super duplex stainless steel horizontal screw centrifugal separator drum - Google Patents
Centrifugal casting method of super duplex stainless steel horizontal screw centrifugal separator drum Download PDFInfo
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/18—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
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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
- C22C38/18—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
-
- 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
- C21D2211/001—Austenite
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a centrifugal casting method of a super duplex stainless steel horizontal screw centrifugal separator drum. The method comprises the following steps that a, the ratio of specific chemical components of a super duplex stainless steel material is designed according to the requirement for the strength of the drum; b, materials are selected; c, refining is performed; d, centrifugal casting is performed; e, heat treatment is performed; f, detection is performed; g, finished products are machined; and h, inspection is performed. Compared with the prior art, the corrosion resistance and mechanical strength of the material are improved, and the material cost is greatly lowered; due to the high-strength of the material, the wall thickness of the product can be decreased by about one third, and the material is saved; meanwhile, due to the fact that drum parts are used on the condition that the rotating speed reaches over 3000 r/min, the equipment energy consumption is greatly lowered after the weight of the parts is decreased, and more energy is saved during equipment operation. Due to the fact that the material is improved, the overall performance of a horizontal screw centrifugal separator is greatly improved, the manufacturing cost of the equipment is lowered, and maximization of the cost performance of the horizontal screw centrifugal machine parts is achieved.
Description
Technical field
The present invention relates to a kind of centrifugal casting process, particularly relate to a kind of super-duplex stainless steel and to crouch spiral shell centrifugal separator drum centrifugal casting process.
Background technology
Sleeping spiral shell separating centrifuge manufacturing wishes constantly to promote the anti-deep-etching of key components and parts, physical strength and dynamic balance performance always, obtains high performance material.
Summary of the invention
Object of the present invention is just to provide one to solve the problems referred to above super-duplex stainless steel and crouches spiral shell centrifugal separator drum centrifugal casting process.
To achieve these goals, the technical solution used in the present invention is: a kind of super-duplex stainless steel crouches spiral shell centrifugal separator drum centrifugal casting process, and method steps is as follows,
A. the specific chemical composition proportion design to super-duplex stainless steel material is required according to barrate strength
According to Cr equivalent Creq, Ni equivalent Nieq experimental formula 1-1,1-2, primary design chemical composition,
Creq=Cr%+Mo%+1.5Si%+0.5Nb+0.5W formula 1-1
Nieq=Ni%+0.3Mn%+0.3Cu%+16 (C+N) formula 1-2
Carry out calculation level corrosion equivalent value PREw by formula 1-3, tentatively judge the corrosion resistance nature of material according to pitting attack value,
PREN=Cr%+3.3 (Mo%+0.5W)+16N formula 1-3
According to the chemical composition of above primary design referring again to the WRC-1992 phase component figure in Stainless Steel Alloy system, chemical composition component is finely tuned, make it final completely satisfied wherein α (ferrite) Phase Proportion to require to control 50% ~ 60%, other is γ (austenite) phase, and reaches the corrosion-resistant requirement of similar super-duplex stainless steel S32750 (SAF2507) same level of expection;
B. selection
Rationally prepared burden by the iron alloy of the carbon steel scrap and high-quality of selecting high-quality, and iron alloy is baked to more than 800 DEG C, guarantee crystal water to dry;
C. refining
Metallic substance in step b is smelted into molten steel through electric arc furnace or medium-frequency induction furnace, after tentatively reaching the chemical composition ranges in step a and tapping temperature arrive 1450 DEG C ~ 1700 DEG C after tapping, molten steel is blended into AOD furnace to be blown into oxygen and to carry out decarburization, desiliconization, and be heated to 1500 DEG C ~ 1700 DEG C temperature ranges, add lime again, fluorite is also blown into argon gas or nitrogen carries out refining, through slag making, skim, remove the S in molten steel, Si, inclusion and nitrogen, oxygen, obnoxious flavour, should again finely tune chemical composition in the process, refining reduction is carried out 1600 DEG C ~ 1700 DEG C temperature ranges, add reductive agent and carry out final deoxygenation by chromium in steel, the metallic reducings such as molybdenum are returned, finally adjust the material requirements of chemical composition to step a, according to the liquidus line calculating of this steel grade and the temperature losses of the process after tapping, and the centrifugal pipe weight of casting, specification size, calculate the best tapping temperature of refining furnace, tap after more qualified liquid steel temperature being adjusted to optimum temps,
D. rotational casting
By mechanical dimension's requirement of sleeping spiral shell centrifugal separator drum, design the type tube of centrifugal casting machine, by molten steel good for refining through centrifugal casting machine cast molding;
E. thermal treatment
Rotational casting shell heat treatment step through being up to the standards is heat-treated, and promotes material corrosion resistant and mechanical property;
F. detect;
G. processed finished products;
H. check.
As preferably, in step a, the chemical composition per-cent of described super-duplex stainless steel material is Cr20.0-27.0%, Ni0.5-3.00%, Mn5.0-13.00%, Mo0.5-4.0%, N0.20-0.70%, C≤0.03%, Si≤1.00%, Cu0.5-1.5%, P≤0.035%, S≤0.030%, W0.5-4.0%, surplus are Fe, by improving cheap element M n, N content, and significantly reduce the noble metal content such as Ni, W, Mo, Cu, the excellent properties basis reaching super-duplex stainless steel reduces material cost.
As preferably, in step b, high-quality iron alloy is ferrochrome, molybdenum-iron, metal nickel plate, metallic copper and tungsten.
As preferably, in step c, when carrying out refining reduction, the reductive agent added is ferrosilicon, silico-calcium or aluminium block.
As preferably, in step c, be ensure molten steel performance, the best tapping temperature of refining furnace is 1550 DEG C ~ 1800 DEG C.
As preferably, in steps d, the processing method of centrifugal casting machine cast molding is as follows, centrifugal casting machine type tube is toasted, opening centrifugal casting machine makes type tube reach 400r/min ~ 600r/min rotating speed, again type tube inwall is evenly sprayed into coating, allow its seasoning, then progressively improve centrifuge speed, then ladle molten steel is injected baked water bucket, and flow into type tube by water bucket, further adjustment rotating speed, to 700r/min ~ 2000r/min, after molten steel has watered, more progressively reduces rotating speed, until the complete cooling forming of foundry goods, then by the foundry goods demoulding.
As preferably, be 200 ~ 300 DEG C by the temperature of centrifugal casting machine type tube baking, now storing temperature the best.
As preferably, described in the paint thickness that sprays into control between 1mm ~ 3mm.
As preferably, in step e, under the temperature condition of 1030-1200 DEG C, carry out solution treatment.
As preferably, carry out cooling fast after solid solution with the precipitation reducing γ, π, χ second-phase.
Compared with prior art, the invention has the advantages that: the present invention is promoting the anticorrosive and physical strength of material, compare conventional stainless material as 316L, 2205, Novel super duplex stainless steel significantly reduces material cost, due to the high strength of material, makes product wall thickness can reduce about 1/3, save material, simultaneously because rotary drum component use under up to more than 3000r/min operating mode, after parts loss of weight, equipment energy consumption is significantly declined, equipment runs more energy-conservation.By the progress of material, promote increasing substantially of sleeping spiral shell centrifuge apparatus overall performance, reduced the manufacturing cost of equipment, achieved the maximization of horizontal screw centrifuge component cost performance.
Accompanying drawing explanation
Fig. 1 is the WRC-1992 phase component figure in Stainless Steel Alloy system.
Embodiment
The invention will be further described below.
Embodiment: a kind of super-duplex stainless steel crouches spiral shell centrifugal separator drum centrifugal casting process, and method steps is as follows,
A. the specific chemical composition proportion design to super-duplex stainless steel material is required according to barrate strength
For obtaining the best structure property of material, according to Cr equivalent (Creq), Ni equivalent (Nieq) experimental formula 1-1,1-2, primary design chemical composition,
Creq=Cr%+Mo%+1.5Si%+0.5Nb+0.5W formula 1-1
Nieq=Ni%+0.3Mn%+0.3Cu%+16 (C+N) formula 1-2
Carry out calculation level corrosion equivalent value PREw by formula 1-3, tentatively judge the corrosion resistance nature of material according to pitting attack value,
PREN=Cr%+3.3 (Mo%+0.5W)+16N formula 1-3
According to the chemical composition of above primary design referring again to the WRC-1992 phase component figure in Stainless Steel Alloy system as Fig. 1, chemical composition component is finely tuned, make it final completely satisfied wherein α (ferrite) Phase Proportion to require to control 50% ~ 60%, other is γ (austenite) phase, and reaches the corrosion-resistant requirement of similar super-duplex stainless steel S32750 (SAF2507) same level of expection;
This patent discloses a kind of chemical composition of Novel super two-phase stainless steel first at China, enterprise's steel grade code is: WZ-SX06, and it is as shown in table 1 that its chemical composition forms (%):
| Element | Cr | Ni | Mn | Mo | N | C |
| Composition | 20.0-27.0 | 0.5-2.0 | 5.0-13.0 | 0.5-2.0 | 0.20-0.70 | ≤0.03 |
| Element | Si | Cu | P | S | W | Fe |
| Composition | ≤1.00 | 0.5-1.5 | ≤0.035 | ≤0.030 | 0.5-2.0 | Surplus |
Table 1 chemical composition is formed
This steel grade is compared to the traditional duplex stainless steel announced and other stainless steel trade mark, owing to having saved Ni, the precious metals such as Mo, material cost is declined to a great extent, to contrast with traditional stainless material 022cr17Ni14Mo2 (hereinafter referred to as 316L), material cost can save 20% ~ 40%, its corrosion resisting property especially resistance to Cl+ ion etching performance is much more excellent than 316L and intermediate duplex stainless steel 022cr25Ni5Mo3N (hereinafter referred to as 2205), its corrosion resistance value PREN >=40 are equal to S32750 (SAF2507), all be better than intermediate duplex stainless steel 2205 and austenitic stainless steel 316 L under many circumstances, its mechanical performance indexs etc., also much larger than above two steel grades, therefore can reduce wall thickness, alleviate weight of equipment, also greatly save material cost in producing apparatus process.In a word, this steel grade is the Novel super two-phase stainless steel that a kind of comprehensive cost performance is very high.
B. selection
Again by selecting high-quality carbon steel scrap, and high-quality iron alloy is as ferrochrome, molybdenum-iron, metal nickel plate, metallic copper and tungsten etc., rationally prepares burden.Polluting molten steel for preventing the crystal water in alloy from entering in molten steel, iron alloy must be baked to more than 800 DEG C, and guarantee crystal water to dry;
C. refining
Metallic substance in step b is smelted into molten steel through electric arc furnace or medium-frequency induction furnace and tentatively reaches chemical composition ranges and tap after adjusting molten steel tapping temperature, best tapping temperature is at 1450 DEG C ~ 1700 DEG C, molten steel is blended into AOD furnace (argon oxygen decarburizing furnace) to be blown into oxygen and to carry out decarburization, desiliconization etc., and by chemical heat heating molten steel to 1500 DEG C ~ 1700 DEG C temperature ranges, add lime, fluorite is also blown into argon gas or nitrogen etc. and carries out refining, through repeatedly slag making, skim, remove S in steel, the inclusiones such as Si and nitrogen, the obnoxious flavoures such as oxygen, should again finely tune chemical composition in the process, guarantee that the chemical composition after reducing reaches design requirements, refining reduction is carried out 1600 DEG C ~ 1700 DEG C temperature ranges, add ferrosilicon or silico-calcium, also aluminium block can be added or other reductive agent carries out final deoxygenation by chromium in steel, the metallic reducings such as molybdenum are returned, finally adjust chemical composition to material requirements, according to the liquidus line calculating of this steel grade and the temperature losses of the process after tapping, and the centrifugal pipe weight of casting, specification size, calculate the best tapping temperature of refining furnace, qualified liquid steel temperature is adjusted to optimum temps (1550 DEG C ~ 1800 DEG C) to tap afterwards and carry out rotational casting,
D. rotational casting
By mechanical dimension's requirement of sleeping spiral shell centrifugal separator drum, design the type tube of centrifugal casting machine, by molten steel good for refining through centrifugal casting machine cast molding, the processing method of centrifugal casting machine cast molding is as follows: centrifugal casting machine type tube is baked to 200 ~ 300 DEG C, opening centrifugal casting machine makes type tube reach 400r/min ~ 600r/min rotating speed, again type tube inwall is evenly sprayed into coating, conservative control paint thickness is between 1mm ~ 3mm, allow its seasoning certain hour, improve centrifuge speed to certain value, then ladle molten steel is injected baked water bucket, and flow into type tube by water bucket, according to product needed, further adjustment rotating speed is to 700r/min ~ 2000r/min, after molten steel has watered, progressively rotating speed is reduced again according to foundry goods cooling situation, until the complete cooling forming of foundry goods, then by the foundry goods demoulding,
E. thermal treatment
Rotational casting shell heat treatment step through being up to the standards is heat-treated, and promotes material corrosion resistant and mechanical property; This material carries out solution treatment under the temperature condition of 1030-1200 DEG C, to obtain the thermal treatment of supersaturated solid solution, after solid solution, suggestion carries out cooling fast with the precipitation reducing the second-phases such as γ, π, χ, and second-phase precipitation may have a negative impact to the performance of material.
F. detect
Mechanical property and corrosive nature detection are carried out to rotational casting shell;
G. processed finished products
Detect that qualified rotational casting shell is machined again reaches separation machinery stainless steel cylinder desired size through thermal treatment;
H. check
The stainless steel cylinder processed can mark packaging and dispatch from the factory after the testing proceduress such as nondestructive testing are qualified.
Rotational casting of the present invention become stainless steel cylinder blank as: the shape such as cylindrical tube, conic tube, is made into horizontal screw centrifuge component after machining and thermal treatment, as cone section rotary drum, straight-section rotary drum, spiral axis etc.
The sleeping spiral shell centrifugal separator drum that Novel super two-phase stainless steel of the present invention goes out through rotational casting explained hereafter, its mechanical property and other material contrast as shown in table 2:
The mechanical property of table 2 part centrifugal casting stainless material
Novel super duplex stainless steel material corrosion resistance of the present invention and other material contrast as follows:
1. stress corrosion fission (SCC) is as shown in table 3,
Table 3 stress corrosion fission (SCC) is compared
2. anti-spot corrosion and crevice corrosion performance
WZ-SX06 is according to ASTMG48A requirement, and in water bath with thermostatic control (22 ± 2 DEG C), soak 72h, weight loss is at 0.2 ~ 0.3mg; Corrosion rate is 0mpy.
3., for anti-local corrosion performance, such as spot corrosion and crevice corrosion, make it be improved by with the addition of elemental chromium, molybdenum and nitrogen.The corrosion of these modes usually occurs in the environment of chloride.In the white liquid of simulation, Novel super duplex stainless steel is tested.The results are shown in Table shown in 4 ~ table 8.
Table 4 testing liquid
| The trade mark | Weight loss, mg | Corrosion rate, mpy |
| WZ-SX06 | 0.2，0.3 | 0.000，0.000 |
| RA2205 | 0.3，0.7 | 0.000，0.000 |
| 304L | 1.3，1.0 | 0.000，0.000 |
| 316L | 4.5，3.4 | 0.002，0.002 |
| 2304 | 0.6，0.3 | 0.000，0.000 |
Liquid phase experiments under table 5 (90 DEG C) condition, 21 days
Table 61.5%FeCl36H2O+3%NaCl+20ml/LHACPh=2,24h
| Solution | Concentration | WZ-SX04 | 316L | RA2205 |
| HCL | 1％ | 55 | 30 | 85 |
| H2SO4 | 10％ | 75 | 50 | 60 |
| H2SO4 | 96.4％ | 30 | 45 | 25 |
The critical temperature that in table 7 sulfuric acid and hydrochloric acid, 0.127mm (millimeter/year) corrodes, DEG C
| Solution | Concentration | WZ-SX06 | 316L | RA2205 |
| H3PO4 | 83％ | 35 | 65 | 50 |
| HF | 2％ | |||
| WPA1 | 75％ | 30 | ＜10 | 45 |
| WPA2 | 75％ | ＜15 | ＜10 | 60 |
The critical temperature that table 8 phosphoric acid 0.127mm (millimeter/year) corrodes, DEG C
Above exhaustive presentation is carried out to the super-duplex stainless steel provided by the present invention spiral shell centrifugal separator drum centrifugal casting process that crouches, apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, to change of the present invention and improve will be possible, and design and the scope of accessory claim defined can not be exceeded, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. super-duplex stainless steel crouches a spiral shell centrifugal separator drum centrifugal casting process, it is characterized in that: method steps is as follows,
A. the specific chemical composition proportion design to super-duplex stainless steel material is required according to barrate strength
According to Cr equivalent Creq, Ni equivalent Nieq experimental formula 1-1,1-2, primary design chemical composition,
Creq=Cr%+Mo%+1.5Si%+0.5Nb+0.5W formula 1-1
Nieq=Ni%+0.3Mn%+0.3Cu%+16 (C+N) formula 1-2
Carry out calculation level corrosion equivalent value PREw by formula 1-3, tentatively judge the corrosion resistance nature of material according to pitting attack value,
PREN=Cr%+3.3 (Mo%+0.5W)+16N formula 1-3
According to the chemical composition of above primary design referring again to the WRC-1992 phase component figure in Stainless Steel Alloy system, chemical composition component is finely tuned, make it finally to meet completely this proportion requirement of alpha ferrite phase and γ austenite phase, and corrosion-resistant requirement;
B. selection
Rationally prepared burden by the iron alloy of the carbon steel scrap and high-quality of selecting high-quality, and iron alloy is baked to more than 800 DEG C, guarantee crystal water to dry;
C. refining
Metallic substance in step b is smelted into molten steel through electric arc furnace or medium-frequency induction furnace, after tentatively reaching the chemical composition ranges in step a and tapping temperature arrive 1450 DEG C ~ 1700 DEG C after tapping, molten steel is blended into AOD furnace to be blown into oxygen and to carry out decarburization, desiliconization, and be heated to 1500 DEG C ~ 1700 DEG C temperature ranges, add lime again, fluorite is also blown into argon gas or nitrogen carries out refining, through slag making, skim, remove the S in molten steel, Si, inclusion and nitrogen, oxygen, obnoxious flavour, should again finely tune chemical composition in the process, refining reduction is carried out 1600 DEG C ~ 1700 DEG C temperature ranges, add reductive agent and carry out final deoxygenation by chromium in steel, the metallic reducings such as molybdenum are returned, finally adjust the material requirements of chemical composition to step a, according to the liquidus line calculating of this steel grade and the temperature losses of the process after tapping, and the centrifugal pipe weight of casting, specification size, calculate the best tapping temperature of refining furnace, tap after more qualified liquid steel temperature being adjusted to optimum temps,
D. rotational casting
By mechanical dimension's requirement of sleeping spiral shell centrifugal separator drum, design the type tube of centrifugal casting machine, by molten steel good for refining through centrifugal casting machine cast molding;
E. thermal treatment
Rotational casting shell heat treatment step through being up to the standards is heat-treated, and promotes material corrosion resistant and mechanical property;
F. detect;
G. processed finished products;
H. check.
2. super-duplex stainless steel according to claim 1 crouches spiral shell centrifugal separator drum centrifugal casting process, it is characterized in that: in step a, the chemical composition per-cent of described super-duplex stainless steel material is Cr20.0-27.0%, Ni0.5-2.0%, Mn5.0-13.00%, Mo0.5-2.0%, N0.20-0.70%, C≤0.03%, Si≤1.00%, Cu0.5-1.5%, P≤0.035%, S≤0.030%, W0.5-2.0%, surplus be Fe.
3. super-duplex stainless steel according to claim 1 crouches spiral shell centrifugal separator drum centrifugal casting process, and it is characterized in that: in step b, high-quality iron alloy is ferrochrome, molybdenum-iron, metal nickel plate, metallic copper and tungsten.
4. super-duplex stainless steel according to claim 1 crouches spiral shell centrifugal separator drum centrifugal casting process, and it is characterized in that: in step c, when carrying out refining reduction, the reductive agent added is ferrosilicon, silico-calcium or aluminium block.
5. super-duplex stainless steel according to claim 1 crouches spiral shell centrifugal separator drum centrifugal casting process, and it is characterized in that: in step c, the best tapping temperature of refining furnace is 1550 DEG C ~ 1800 DEG C.
6. super-duplex stainless steel according to claim 1 crouches spiral shell centrifugal separator drum centrifugal casting process, it is characterized in that: in steps d, the processing method of centrifugal casting machine cast molding is as follows, centrifugal casting machine type tube is toasted, opening centrifugal casting machine makes type tube reach 400r/min ~ 600r/min rotating speed, again type tube inwall is evenly sprayed into coating, allow its seasoning, then progressively centrifuge speed is improved, then ladle molten steel is injected baked water bucket, and flow into type tube by water bucket, further adjustment rotating speed is to 700r/min ~ 2000r/min, after molten steel has watered, progressively reduce rotating speed again, until the complete cooling forming of foundry goods, then by the foundry goods demoulding.
7. super-duplex stainless steel according to claim 6 crouches spiral shell centrifugal separator drum centrifugal casting process, it is characterized in that: the temperature of being toasted by centrifugal casting machine type tube is 200 ~ 300 DEG C.
8. super-duplex stainless steel according to claim 6 crouches spiral shell centrifugal separator drum centrifugal casting process, it is characterized in that: described in the paint thickness that sprays into control between 1mm ~ 3mm.
9. super-duplex stainless steel according to claim 1 crouches spiral shell centrifugal separator drum centrifugal casting process, it is characterized in that: in step e, under the temperature condition of 1030-1200 DEG C, carries out solution treatment.
10. super-duplex stainless steel according to claim 9 crouches spiral shell centrifugal separator drum centrifugal casting process, it is characterized in that: carry out cooling fast after solid solution with the precipitation reducing γ, π, χ second-phase.
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| CN105834390A (en) * | 2016-06-14 | 2016-08-10 | 四川维珍石化设备有限公司 | Method for carrying out vertical centrifugal casting on annular part of centrifugal machine through metal mold |
| CN107829029A (en) * | 2017-11-10 | 2018-03-23 | 洛阳双瑞特种装备有限公司 | A kind of ZG022Cr22Ni5Mo3N materials two phase stainless steel smelting process method |
| CN107900612A (en) * | 2017-11-02 | 2018-04-13 | 江苏巨能机械有限公司 | The processing technology of large-scale two phase stainless steel rotary drum disk |
| CN109468522A (en) * | 2018-12-26 | 2019-03-15 | 无锡市优工精密阀门有限公司 | The full form casting process of super-duplex stainless steel pump case |
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| CN101003115A (en) * | 2006-12-22 | 2007-07-25 | 成都天保机械制造有限公司 | Method for fabricating rotary drum |
| CN102027147A (en) * | 2008-05-16 | 2011-04-20 | 奥托库姆普联合股份公司 | Stainless steel product, use of the product and method of its manufacture |
| CN102248147A (en) * | 2011-07-01 | 2011-11-23 | 屈志 | Novel stainless steel centrifuge revolving drum and manufacturing method thereof |
| CN103857816A (en) * | 2011-10-21 | 2014-06-11 | 新日铁住金不锈钢株式会社 | Duplex stainless steel, duplex stainless steel slab, and duplex stainless steel material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105834390A (en) * | 2016-06-14 | 2016-08-10 | 四川维珍石化设备有限公司 | Method for carrying out vertical centrifugal casting on annular part of centrifugal machine through metal mold |
| CN107900612A (en) * | 2017-11-02 | 2018-04-13 | 江苏巨能机械有限公司 | The processing technology of large-scale two phase stainless steel rotary drum disk |
| CN107900612B (en) * | 2017-11-02 | 2019-10-18 | 江苏巨能机械有限公司 | The processing technology of large-scale two phase stainless steel rotary drum disk |
| CN107829029A (en) * | 2017-11-10 | 2018-03-23 | 洛阳双瑞特种装备有限公司 | A kind of ZG022Cr22Ni5Mo3N materials two phase stainless steel smelting process method |
| CN109468522A (en) * | 2018-12-26 | 2019-03-15 | 无锡市优工精密阀门有限公司 | The full form casting process of super-duplex stainless steel pump case |
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| CN105349906B (en) | 2018-08-10 |
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