1. Dab tsi yog qhov sib txawv tseem ceeb ntawm N4 (UNS N02201), N6 (UNS N02200), Ni200, thiab Ni201 npib tsib xee alloys, thiab qhov sib txawv no txhais li cas rau lawv cov ntawv thov kev lag luam?
Ntshiab nickel alloys N4/N6 (feem ntau xa mus los ntawm lawv cov lej UNS N02201 thiab N02200, feem) thiab lawv cov npe lag luam lag luam Ni200 thiab Ni201 sawv cev rau qee qhov tseem ceeb tshaj plaws corrosion-cov ntaub ntawv tiv taus. Thawj qhov sib txawv yog nyob rau hauv lawv cov ntsiab lus carbon thiab ua rau cov khoom siv kho tshuab.
Ni200 (UNS N02200 / N6): Qhov no yog "tus qauv" ua lag luam ntshiab wrought npib tsib xee (99.6% min Ni). Nws muaj cov ntsiab lus siab tshaj plaws ntawm 0.15%. Cov pa roj carbon ntau dua no ua rau nws raug rau graphitization thiab embrittlement thaum raug kub ntawm 425℃thiab 650℃rau lub sijhawm ntev. Lub precipitated graphite ntawm cov ciam teb nplej tuaj yeem txo qis ductility thiab toughness. Yog li, Ni200 tau pom zoo rau kev pabcuam kub hauv qab 315 degree.
Ni201 (UNS N02201 / N4): Qhov no yog qhov qis -carbon version ntawm kev lag luam ntshiab npib tsib xee, nrog cov ntsiab lus siab tshaj ntawm 0.02%. Qhov no txo qis carbon cov ntsiab lus tshem tawm qhov kev pheej hmoo ntawm graphitization, ua rau Ni201 qhov kev xaiv zoo tshaj plaws rau siab -kev siv kub hauv thaj tsam ntawm 315℃txog 650℃. Nws muaj kev ruaj ntseg zoo dua thiab khaws cov ductility tom qab ntev -lub sij hawm raug rau qhov kub siab.
Daim ntawv thov Dictated by Properties:
Ni200 (N6): Qhov zoo tshaj plaws rau chav tsev kub thiab nruab nrab ntawm qhov kub thiab txias. Cov khoom siv feem ntau suav nrog: cov khoom siv ua zaub mov (vim muaj kev tiv thaiv corrosion zoo heev thiab tsis yog- paug), cov khoom siv tshuaj lom neeg, cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob / hluav taws xob.
Ni201 (N4): Tshwj xeeb rau qhov tseem ceeb heev -kub thiab corrosive ib puag ncig. Cov ntawv thov tseem ceeb muaj xws li: caustic evaporators, molten ntsev tuav cov khoom, cov khoom siv hauv aerospace, thiab cov khoom siv hluav taws xob tseem ceeb xws li cov khoom cua sov thiab cov cua sov retorts. Nws txoj kev weldability kuj feem ntau suav hais tias yog qhov zoo tshaj rau kev ua haujlwm siab - kub.
Qhov tseem ceeb, qhov kev xaiv boils mus rau qhov kev pabcuam kub. Rau qhov kub siab, Ni201 yog qhov yuav tsum tau ua. Rau lwm cov corrosion-cov ntawv siv tiv taus, Ni200 feem ntau yog tus nqi- siv tau zoo.
2. Vim li cas siab -purity npib tsib xee zoo li Ni200/N201 thiaj li tiv taus corrosion, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig xws li caustics thiab txo cov cua?
Ntshiab nickel's corrosion resistance stems los ntawm nws cov inherent nobility (zoo electrode muaj peev xwm) thiab nws muaj peev xwm tsim ib tug ruaj khov, adherent passive oxide zaj duab xis nyob rau hauv ntau qhov chaw. Txawm li cas los xij, nws qhov kev ua tau zoo tshaj plaws hauv ob qhov tseem ceeb:
Alkaline (Caustic) Ib puag ncig: Nickel yog ib qho ntawm ob peb cov hlau uas yog thermodynamically ruaj khov hauv cov tshuaj caustic. Nws cov oxide zaj duab xis yog qhov ruaj khov thiab tiv thaiv thoob plaws ntau qhov ntau thiab qhov kub thiab txias, txawm tias mus txog rau lub xeev molten ntawm caustic soda (NaOH). Qhov no ua rau nws yog cov khoom siv tseem ceeb rau kev tsim khoom, tuav, thiab evaporation ntawm alkalis. Tsis zoo li hlau los yog hlau, uas raug kev nyuaj siab heev corrosion cracking nyob rau hauv kub caustics, nickel tseem ductile thiab resilient.
Txo Atmospheres thiab Halogens: Nyob rau hauv ib puag ncig uas muaj oxygen tsawg (txo cov kev mob) los yog nyob rau hauv lub xub ntiag ntawm qhuav halogens xws li chlorine thiab hydrogen chloride, stainless steels feem ntau ua tsis tiav vim yog tawg ntawm lawv cov chromium oxide zaj duab xis. Ntshiab npib tsib xee, nrog nws cov nickel- oxide zaj duab xis, ua tau zoo dua nyob rau hauv cov kev txo qis thiab qhuav halogen. Nws kuj tseem tiv taus corrosion los ntawm txhua yam tsis yog - oxidizing ntsev (xws li chlorides, sulfates).
Nws qhov tsis muaj zog yog nyob rau hauv oxidizing acidic ib puag ncig (xws li, nitric acid, chromic acid) qhov twg cov nickel oxide zaj duab xis dissolves, thiab nyob rau hauv ib puag ncig uas muaj oxidizing ntsev xws li ferric los yog cupric chlorides.
3. Yuav ua li cas "Lub Hoobkas Nqe" rau cov ntshiab npib tsib xee bar fluctuate, thiab dab tsi yog cov thawj kev lag luam tsav tsheb tom qab nws volatility?
Lub Hoobkas nqi rau ntshiab npib tsib xee bar (thiab tag nrho cov khoom nickel zeb) tsis zoo li qub; nws yog dynamic heev thiab feem ntau index -linked. Tus nqi yog feem ntau hais raws li tus nqi them lossis luv nqi tshaj qhov hauv qab London Metal Exchange (LME) Nickel Cash tus nqi raug cai.
Tus nqi kawg tuaj yeem tawg tau raws li: Nqe Kawg=LME Nickel Nqe + Alloy-Tshwj xeeb hwm + Kev Tsim Khoom / Tus Nqi Ua Haujlwm + Tus Muag Khoom Margin.
Key Market Drivers:
LME Nickel Nqe: Qhov no yog qhov sib txawv loj tshaj plaws. Nws yog tsav los ntawm cov khoom siv thoob ntiaj teb (tsim cov khoom lag luam tawm los ntawm Indonesia, Philippines, Russia, Canada), kev thov (tsuas yog los ntawm stainless-} steel sector, uas siv ~ 70% ntawm npib tsib xee, thiab lub zog hluav taws xob tsheb roj teeb rau Class I nickel), cov khoom muag thoob ntiaj teb (LME warehouse stocks), macroeconomic sentiment, thiab txiaj pauv nyiaj.
Alloy Premium (lossis "Mill Premium"): Qhov no suav nrog tus nqi ntawm cov nickel refining rau qhov tshwj xeeb siab purity xav tau rau Ni200/201 (99.6%+ Ni), melting, casting, thiab inherent mov-xav kom sib npaug rau cov khoom tshwj xeeb no thiab cov hlau alloy. Kev cuam tshuam hauv kev tsim khoom, cov nqi hluav taws xob hauv melting, thiab kev thov los ntawm cov haujlwm tseem ceeb xws li aerospace thiab kev ua tshuaj lom neeg cuam tshuam rau tus nqi no.
Kev Ua Haujlwm / Daim Ntawv Them Nyiaj: Tus nqi ntawm kev hloov pauv ib qho ingot rau hauv ib qho kos lossis extruded bar ntxiv tus nqi. Kev kam rau siab, nto tiav, qhov loj (inch), thiab cov ntawv pov thawj (xws li ASTM B160) kuj cuam tshuam rau tus nqi kawg. Me -inch, precision- kos cov kab hais kom tus nqi siab dua qhov loj, kub- ua haujlwm tuav.
Volume & Relationship: Loj, ntev - daim ntawv cog lus nrog cov neeg siv khoom loj feem ntau tau txais tus nqi ruaj khov dua, thaum me me, qhov chaw yuav khoom tau nthuav tawm tag nrho cov kev lag luam niaj hnub.
4. Nyob rau hauv machining thiab fabrication, dab tsi yog qhov tseem ceeb rau kev txiav txim siab thaum ua hauj lwm nrog ntshiab nickel bar Tshuag zoo li Ni201?
Ntshiab npib tsib xee paub tias yog gummy thiab tawv rau lub tshuab, nthuav tawm cov kev sib tw sib txawv ntawm cov hlau lossis txawm tias qee cov hlau tsis muaj steel.
Kev Ua Haujlwm Hardening: Nickel muaj qhov ua haujlwm siab heev. Qhov no yog qhov tseem ceeb tshaj plaws. Kev txiav qeeb, hnyav, tsis tu ncua nrog cov cuab yeej ntse yog qhov tseem ceeb. Yog tias lub cuab yeej rub los yog siv lub teeb ci dhau los txiav, nws yuav ua haujlwm sai heev - txheej txheej txheej, ua rau kev hla dhau nyuaj heev thiab ua rau cov cuab yeej hnav lossis tawg sai.
Tooling: Carbide cov cuab yeej yuav luag yuav tsum tau rau ntau lawm machining. Cov cuab yeej yuav tsum yog rab chais-ntse nrog lub kaum sab xis zoo kom txiav cov khoom kom huv si. Cobalt-HSS cov cuab yeej siv tau tab sis yuav tsum tau ua kom nrawm dua. Polycrystalline pob zeb diamond (PCD) cov cuab yeej muab lub neej zoo tshaj plaws rau siab - ntim ua haujlwm.
Txiav tsis: Siv qis mus rau nruab nrab ceev, siab pub tus nqi, thiab txiav tob. Qhov no ua kom qhov kev txiav yog ua hauv qab ua haujlwm- txheej tawv tawv los ntawm kev dhau dhau los. Copious npaum li cas ntawm hnyav -lub luag hauj lwm, chlorinated los yog sulfurized txiav kua yog tsim nyog los txias lub workpiece, lubricate lub txiav, thiab yaug chips.
Chip Control: Nickel ua kom ntev, stringy, tawv chips uas tuaj yeem ua rau muaj kev phom sij. Chip breakers ntawm lub cuab yeej yog qhov tseem ceeb. Rau kev vuam, ua ntej- ntxuav kom tshem tawm cov roj thiab cov khoom paug yog qhov tseem ceeb, thiab siv cov hlau sib txuam (xws li ENi-1) yog tus qauv. Nws siab thermal expansion thiab conductivity yuav tsum tau ceev faj tswj ntawm tshav kub input kom tsis txhob distortion.
5. Dab tsi yog cov ntsiab lus tseem ceeb thoob ntiaj teb tus neeg yuav khoom yuav tsum tau thov thaum muab cov nickel ntshiab rau cov ntawv thov tseem ceeb?
Txhawm rau kom ntseeg tau cov khoom zoo, taug qab, thiab ua haujlwm tau zoo, kev qhia meej tus qauv raug yog tsis yog -xav tau. Cov ntsiab lus tseem ceeb suav nrog chemistry, mechanical properties, thiab dimensional tolerances.
ASTM (American Society for Testing and Materials): Qhov no yog tus qauv siv dav tshaj plaws thoob ntiaj teb rau cov nickel alloys.
ASTM B160: Txuj Specification rau Nickel Qws thiab Bar. Qhov no qhia txog cov tshuaj muaj pes tsawg leeg, cov cuab yeej cuab tam (lub zog tensile, yield zog, elongation), thiab cov lus qhia dav dav rau Ni200 thiab Ni201 tuav.
ASTM B162: Txheem Specification rau Nickel Phaj, Sheet, thiab Sawb. (Feem ntau hais txog cov khoom tiaj tus, tab sis tseem ceeb rau tag nrho cov qauv khoom).
ASME (American Society of Mechanical Engineers): Rau kev siv lub nkoj siab lossis boiler code, ASME SB-160 specification yog zoo tib yam rau ASTM B160 tab sis nqa lub "SB" rau kev pom zoo ASME Code.
EN (European Norm):
TS EN 2.4066 & 2.4068: Cov no yog cov khoom siv tus lej rau Ni 99.2 (zoo ib yam li Ni200) thiab Ni 99.0 (qib qis dua me ntsis), feem.
TS EN 10095: Thaum tshav kub kub- tiv thaiv cov hlau, cov qauv tsim cov qauv zoo sib xws.
UNS (Unified Numbering System): UNS N02200 rau Ni200 thiab UNS N02201 rau Ni201. Cov lej lej no tau lees paub thoob ntiaj teb thiab yuav tsum nco ntsoov suav nrog Daim Ntawv Pov Thawj Zeb Xeem (MTC).
Lub luag haujlwm yuav khoom yuav qhia meej: "Nickel Bar, UNS N02201 (Ni201), rau ASTM B160, nrog rau tag nrho traceability thiab Mill Test Certificate rau 3.1 EN 10204." 3.1 MTC, muab los ntawm lub zeb, tau lees paub cov tshuaj thiab cov khoom siv hluav taws xob ntawm cov khoom siv hluav taws xob tshwj xeeb / ntau cov khoom nkag.
