Khoom nta
Tsis tshua muaj siab hardness thiab hnav tsis kam
Stellite 20 ua tiav ntau qhov nyuaj M₇C₃ thiab M₆C carbides (nrog hardness txog 1500-1800 HV) los ntawm nws \\"high carbon, siab chromium, siab tungsten\\" muaj pes tsawg leeg tsim, uas yog uniformly faib nyob rau hauv cobalt-x cov kua matrix. Ib qho nyuaj nyuaj hauv cam khwb cia lossis weld-deposited mob yog HRC 50-58 (kwv yees HV 550-700). Nws lub peev xwm los tiv thaiv abrasive thiab erosive hnav ib qeb ntawm qhov zoo tshaj plaws hauv cobalt-raws li alloys, ua rau nws tsim nyog rau kev nyuaj siab zawv zawg kev sib txhuam thiab qis-angle yaig tej yam kev mob uas muaj cov khoom nyuaj.
Zoo heev -Tub kub Hardness thiab Oxidation Resistance
Stellite 20 khaws cia kwv yees li 40 HRC hardness ntawm 600 degree, txog 32 HRC ntawm 760℃(1400℃F), thiab nyob ib ncig ntawm 25 HRC ntawm 870℃(1600℃F). Cov ntsiab lus siab chromium txhawb kev tsim cov Cr₂O₃ oxide zaj duab xis rau saum npoo. Tom qab raug cua ntawm 800℃rau 1000 teev, oxidation hnyav nce yog tsawg dua 1 mg / cm². Nws cov oxidation tsis kam deb tshaj li cov cuab yeej steel thiab hlau-raws li hnav- cov ntaub ntawv resistant, ua rau nws haum rau siab - kub daim ntaub ntawv xws li kub shearing, kub extrusion, thiab roj turbines.
Zoo Corrosion Resistance
Nrog kwv yees li ntawm 30% chromium cov ntsiab lus, Stellite 20 nthuav tawm qhov zoo corrosion kuj nyob rau hauv oxidizing acids (xws li, nitric acid), nruab nrab concentrated tsis yog - oxidizing acids (xws li, Tsawg dua los yog sib npaug rau 50% sulfuric acid), thiab alkaline daws. Nyob rau hauv dej hiav txwv thiab chloride ib puag ncig, nws feem ntau ua rau pitting corrosion es tsis zoo corrosion, thiab tuav ruaj khov corrosion kuj nyob rau hauv siab -kub cua kub uas muaj sulfur thiab chlorine.
Machining thiab ua yam ntxwv
Raws li nkig hnav- cov khoom siv tiv taus, Stellite 20 muaj chav tsev - kub tensile lub zog ntawm kwv yees li 650-850 MPa, lub pob txha elongation tsuas yog 1-2%, thiab tsis tshua muaj kev cuam tshuam toughness (Charpy V-notch<10 J). Therefore, it is not suitable for applications subjected to severe impact loads but performs excellently in sliding wear and fretting wear conditions. The alloy is typically manufactured by precision casting or powder metallurgy. Common application methods include welding (PTA, TIG, oxy-acetylene). Due to its high susceptibility to hot cracking, preheating to 400-600°C and control of interpass temperature are required during welding, followed by slow cooling after welding. Due to its extremely high hardness, grinding or electrical discharge machining (EDM) is recommended for finishing.
Technical Specifications
Tshuaj muaj pes tsawg leeg
|
Element |
Standard Requirements |
Sau ntawv |
|
Co |
Cov khoom seem |
Matrix cov ntsiab lus uas muab siab - kub lub zog, thermal stability, toughness, thiab inherent corrosion kuj |
|
Cr |
30.0 - 34.0% |
Tsim ib daim ntawv tuab Cr₂O₃ tiv thaiv zaj duab xis, muab oxidation thiab corrosion kuj, thiab tseem yog ib feem tseem ceeb ntawm hard carbides. |
|
W |
14.0 - 18.0% |
Muab cov tshuaj tiv thaiv kom muaj zog, ua kom tawv nqaij thiab hnav- cov carbides resistant nrog cov pa roj carbon monoxide, ua kom muaj zog ntau dua - kub hardness thiab creep resistance |
|
C |
2.0 - 2.8% |
Tsim ib tug loj npaum li cas ntawm siab-hardness carbides (M₇C₃, M₆C) nrog chromium thiab tungsten, uas yog lub hauv paus ntawm ultra- siab hnav tsis kam |
|
Fe |
Tsawg dua lossis sib npaug li 3.0% |
Kev tswj nruj kom paub meej purity thiab microstructural stability |
|
Ni |
Tsawg dua lossis sib npaug li 3.0% |
Kev tswj nruj nruj kom tiv thaiv nickel ntau dhau los ua rau embrittlement |
|
Si |
Tsawg dua lossis sib npaug li 2.0% |
Deoxidizer |
|
Mn |
Tsawg dua lossis sib npaug li 1.0% |
Deoxidizer, txhim kho kev ua haujlwm |
|
Mo |
Tsawg dua lossis sib npaug li 1.0% |
Kev xaiv me me ntxiv los muab cov kev daws teeb meem zoo zog ntxiv thiab pitting corrosion kuj |
Lub cev muaj zog
|
Khoom |
Tus nqi / Ntau |
Kev Xeem |
|
Qhov ntom |
8.69 - 8.87 g/cm³ |
Chav tsev kub (20 degree) |
|
Melting Point |
1240 - 1350 degree |
- |
|
Coefficient ntawm Thermal Expansion (20-100 degree) |
11.5 - 12.5 × 10⁻⁶ /K |
- |
|
Elastic Modulus (Young's Modulus) |
205 - 230 GPa |
Chav kub |
|
Thermal conductivity (20 degree) |
14.5 - 14.8 W/(m·K) |
- |
|
Kev tiv thaiv |
0.85 - 0.94 μΩ·m |
- |
|
Magnetism |
Tsis yog-magnetic (magnetic tsis muaj zog) |
Cobalt-raws li alloys feem ntau tsis yog- sib nqus los yog tsis muaj zog sib nqus ntawm chav tsev kub |
Mechanical Properties (Ntaus / Welded Condition, Hom Tus Nqi)
|
Khoom |
Tus nqi |
Specification |
|
Hardness (Cast / Weld Overlay Condition) |
50 - 58 HRC(550 - 700 HV) |
AWS A5.21 ECoCr-C |
|
Tensile zog |
650 - 850 MPa |
- |
|
Lub zog (0.2% Offset) |
550 - 700 MPa |
- |
|
Elongation |
1 - 2% (cov khoom siv nkig) |
- |
|
Compressive zog ntawm chav tsev kub |
2000 - 2500 MPa |
- |
|
Impact toughness |
Charpy V-qhov cuam tshuam lub zog < 10 J |
- |
Lus Cim: Stellite 20 yog ib qho hnav tsis taus - cov khoom siv tiv taus. Nws cov cim kev ua haujlwm tseem ceeb yog hardness thiab hnav tsis kam. Nws muaj lub zog tensile tsawg thiab cov yas tsis zoo, thiab feem ntau tsis pom zoo rau cov khoom siv uas muaj zog tensile siab.
High -kev ua haujlwm kub
Stellite 20 muaj peev xwm tshwj xeeb los tswj cov tawv nqaij ntawm qhov kub thiab txias. Hauv qab no yog cov nqi siv rau kev sib txawv hardness nrog kub:
|
Kub |
Hom hardness |
|
Chav ntsuas kub |
50 - 58 HRC |
|
400℃(750℃F) |
46 HRC |
|
600℃(1110℃F) |
40 HRC |
|
760℃(1400℃F) |
32 HRC |
|
870℃(1600℃F) |
25 HRC |
Antioxidant Performance:
Nyob rau hauv siab - qhov kub thiab txias oxidation ib puag ncig, Stellite 20 tsim ib tug ntom Cr₂O₃ oxide zaj duab xis ntawm nws nto. Tom qab raug huab cua ntawm 800℃rau 1000 teev, oxidation hnyav nce tsawg dua 1 mg / cm², ua kom pom cov khoom antioxidant zoo dua li cov hlau feem ntau -raws li cua sov- resistant steels.
Ntev -Lub Sij Hawm Thermal Stability:
Thaum nyob rau hauv kev pab cuam ntawm kub siab tshaj 600℃rau ncua sij hawm, lub alloy exhibits zoo heev microstructural stability tsis muaj theem tseem ceeb transformation los yog softening. Lub allotropic transformation ntawm cobalt matrix thiab khoom- kev daws teeb meem los ntawm tungsten collectively xyuas kom meej nws lub neej ntev kev pab cuam nyob rau hauv siab - kub.
Siv tau Media:
1. Dej hiav txwv thiab dej ntsev (zoo heev pitting corrosion kuj; feem ntau raug rau pitting es tsis zoo corrosion)
2. Oxidizing acids: Nitric acid (zoo corrosion kuj ntawm chav tsev kub)
3. Tsis yog -oxidizing acids: Sulfuric acid (concentration Tsawg dua los yog sib npaug rau 50%), hydrochloric acid (concentration Tsawg dua los yog sib npaug li 30%) (corrosion rate feem ntau<0.1 mm/a)
4. Alkaline daws: Sodium hydroxide, potassium hydroxide (resistant rau tag nrho cov concentrations)
5. Organic acids: Acetic acid, formic acid, thiab lwm yam.
6. Siab -kub oxidizing cua thiab leej faj / chlorine- muaj roj (cov ntaub ntawv tiv thaiv Cr₂O₃ rau saum npoo)
Lus Cim: Stellite 20 muaj qhov txwv tsis pub muaj kev tiv thaiv corrosion hauv kev txo cov kua qaub (xws li, concentrated hot hydrochloric acid) thiab fluorine- muaj cov xov xwm. Rau siab - kev sib txhuam kev nyuaj siab, nws raug nquahu kom siv ua ke nrog cov roj nplua nyeem.
Stellite 20 yog tsim los rau cov ntawv thov uas xav tau kev hnav tsis kam thiab siab -kub hardness, pom zoo rau cov nram qab no:
Daim ntawv thov teb
-
Valves thiab Sealing Industry: High-siab / super- siab- siab valve sealing nto (lub rooj zaum, discs, stems), twj tso kua mis, rotating seals, mechanical seals, qhov twg nws tshwj xeeb hardness thiab hnav tsis kam yog haum rau siab -siab sib txawv xov xwm uas muaj cov khoom nyuaj.
-
Aerospace thiab Zog: Gas turbine seals, hniav hnav strips, combustion chamber Cheebtsam, cav valve sealing nto, turbocharger seals, leveraging nws muaj peev xwm tswj tau siab hardness thiab zoo heev hnav tsis kam ntawm kub siab tshaj 760 degree.
-
Roj thiab Roj: Cov cuab yeej Downhole hnav cov khoom siv, laum cov yeeb nkab txuas, lub valve sab hauv, cov khoom siv hauv av nkos, tiv taus siab - nrawm yaig thiab abrasive hnav los ntawm cov xuab zeb thiab cov khoom me me -laden media.
-
Muaj Machinery thiab cov cuab yeej: Kub extrusion tuag, kub shear hniav, tuag-casting pwm ( rooj vag, plungers), extruder screws, txiav npoo rau yas ua, centerless sib tsoo tshuab txhawb.
-
Tshuaj thiab Petrochemical: Reactor agitator blades, hnav-cov ntaub ntawv tiv thaiv rau cov tshav kub exchanger raj phaj, twj tso kua mis thiab valve sealing qhov chaw, withstanding ua ke los ntawm corrosion thiab hnav.
-
Nuclear Fais Fab Kev Lag Luam: Nuclear Island valve ntsaws ruaj ruaj, nuclear- qib hnav- cov ntaub ntawv tiv thaiv, siv nws cov hluav taws xob siab ntev thiab microstructural stability.
-
Shipbuilding thiab Offshore Engineering: Hnav qhov chaw ntawm lub kiv cua, cov twj tso kua mis thiab lub valve, tiv thaiv seawater corrosion thiab mechanical hnav.
-
Automotive thiab Internal Combustion Engines: High -kev ua tau zoo ntawm cov pa tawm li qub, lub caj npab rocker, turbocharger ntsaws ruaj ruaj, tswj kev hnav thiab qaug dab peg ntawm qhov kub thiab txias.
-
Kev kho cov hlau thiab cua sov: Kub shear hniav, kub pom hniav, rauv hauv qab yob, coj yob, tiv taus siab -kub oxidation thiab abrasive hnav.
-
Iav thiab Ceramic Forming: iav pwm, kub extrusion tuag, vim lawv zoo corrosion kuj rau molten iav thiab ceramics.
Kev xa khoom thiab Customization
Peb muab cov kev daws teeb meem hloov tau yooj yim thiab txhim khu kev qha kom ntseeg tau tias koj tau txais Stellite 20 cov ntaub ntawv uas phim koj qhov project xav tau.
|
Daim ntawv |
 Ntawv / phaj
|
 Bar / Qws
|
 Seamless Yeeb Nkab
|
 Sawb / Sheet Coil
|
 Hlau / Hlau Rod
|
|---|---|---|---|---|---|
|
Pauv ntau yam |
Thickness: 0.5 - 100 hli |
Txoj kab uas hla Φ6-500mm |
Sab nraud txoj kab uas hla Φ10-300mm |
Thickness: 0.1-3.0 hli |
Txoj kab uas hla Φ0.5-10mm |
|
Customization Muaj peev xwm |
Tshwj xeeb tuab / nyias dov, ultra- daim hlau dav; tshwj xeeb nto kho, tsau -ntev txiav |
Loj- loj forged tuav (txog Φ800 mm), tshwj xeeb- cov kab tuav, thiab ntau yam kev kho cua sov |
Loj - txoj kab uas hla tuab - cov kav dej, tshwj xeeb alloy muaj pes tsawg leeg; Yeeb nkab kawg ua (beveling, ruaj ntev) |
Cov xwm txheej sib txawv, kev kho cua sov tshwj xeeb (kev kho kom ruaj khov, tswj qhov loj me), cov kua qaub- ntxuav qhov chaw, electrolytic polishing, txheej, lossis cov yeeb yaj kiab tiv thaiv tshwj xeeb |
Kev kho deg tshwj xeeb, kos duab precision |
Vim li cas thiaj xaiv peb? - Txhim khu kev qha Engineering Technology. Dependable xa khoom.
Peb tsis yog ib tus neeg muag khoom xwb, tab sis yog ib tus neeg koom tes nrog cov ntaub ntawv ntseeg siab rau koj hauv Suav teb.
Vertically Integrated Production
Muaj 20,000㎡ qhov chaw nrog 10+ automated kab (8, 000+ tons / xyoo). Hauv - tsev cuab yeej & qhov chaw tuag ua rau muaj kev hloov kho sai thiab tswj tus nqi zoo - tsis muaj tus neeg nruab nrab kos npe.
Kev Tswjhwm nruj nruj ntawm txhua theem
Tag nrho traceability nyob rau hauv lub tseem ceeb QC checkpoints thoob plaws hauv ntau lawm . 100% raws li ASTM/ASME, EN, thiab GB qauv. Cov ntaub ntawv xeem cov ntaub ntawv muaj nyob nrog txhua qhov khoom xa tuaj.
Txhim khu kev xa khoom & Export ntim
10+ xyoo xa tawm mus rau Tebchaws Europe, North America, Southeast Asia & Middle East nrog cov dej tsis muaj dej thiab tiv thaiv- xeb, ua ke nrog cov kev xaiv thauj khoom yooj yim kom muaj kev nyab xeeb thiab nyob rau - lub sijhawm tuaj txog.
Qauv validation ua ntej pawg ntau lawm
Peb muab cov qauv dawb rau kev kuaj xyuas zoo, tso cai rau koj tso cov xaj xaj tsuas yog tom qab kev pom zoo. Peb xyuas kom meej qhov sib xws los ntawm cov qauv mus rau cov khoom loj los ntawm qhov ntsuas qhov tseeb thiab kev tsim pob tshab.
FAQ
Q: Dab tsi yog qhov zoo ntawm Stellite 20?
Q: Kev kho cua sov dab tsi yuav tsum tau ua rau Stellite 20?
Q: Qhov kev pabcuam siab tshaj plaws yog dab tsi?
Q: Dab tsi yog qhov txawv ntawm Stellite 20 thiab Stellite 6?
Cim npe nrov: Tuam Tshoj stellite 20 manufacturers, lwm tus neeg, Hoobkas
