Qhov sib txawv ntawm C276 thiab 400 Alloy

1. Tshuaj lom neeg sib xyaw

Thawj qhov kev sib txawv ntawm lawv cov khoom sib dhos, uas ncaj qha rau lawv qhov kev ua tau zoo:

Hastelloy C276
Lub npib tsib xee-chromium-molybdenum-tungsten alloy nrog cov muaj pes tsawg leeg hauv qab no (WT%):

Nickel (NI): ~ 57% (tshuav nyiaj li cas)

Chromium (CR): 14-16%

Molybdenum (MO): 15-17%

Tungsten (w): 3-4%

Hlau (FE): 4-7%

Cov pa roj carbon me me, silicon, manganese, thiab cobalt.

Nws lub siab molybdenum thiab tungsten cov ntsiab lus yog qhov tseem ceeb rau kev tawm tsam ib puag ncig kev txo qis, thaum chromium muab oxidation tsis kam.

Alloy 400 (Monel 400)
Ib npib tsib xee-tooj liab nrog cov sib xyaw ua ke hauv qab no (WT%):

Nickel (NI): 63-67% (tshuav nyiaj li cas)

Tooj Liab (Cu): 28-34%

Me me ntawm hlau (1.25% max), manganese (1% max), thiab carbon (0.3% max).

Nws cov ntsiab lus tooj liab loj txhim kho kom tsis kam rau kev tawm tswv yim corrosive, tshwj xeeb hauv nruab nrab kom me ntsis acidic ib puag ncig.

2. Corrosion Kuj

Lawv cov corrosion resistance profiles sib txawv vim yog lawv cov alloying tshwj xeeb:

Hastelloy C276

Txawj rau hauvKev txo qhov chaw tsawg, xws li muaj zog hydrochloric acid (hcl), sulfuric acid (hso₄), phosflof acid (hf) (thaum muaj kev lom zem). Nws tawm tsam pitting, corrosion corrosion, thiab kev nyuaj siab corrosion cracking (piv txwv li cov tshuaj chloride (piv txwv li, seawater, brines) txawm tias muaj kub.

Ua tau zoo hauvMIXED Acid Systems(xws li, sulfuric + nitric acid) thiab oxidizing-txo mus los.

Ua kom muaj kev ruaj khov nyob rau hauv cov chaw kub siab (txog ~ 1,093℃/ 2,000℃F) vim nws cov ntsiab lus chromium.

Alloy 400

Vam meej nyob rau hauvnruab nrab rau me ntsis acidic / alkaline ib puag ncig, tshwj xeeb yog cov uas muajdej qab ntsev, dej hiav txwv, thiab dilute tsis-oxidizing acids(xws li, acetic acid, sulfurous acid).

Tsis kam corrosion los ntawmHydrofluoric acid (HF)Thiab cov tshuaj fluoride, txawm tias ntawm cov txiaj ntsig siab-ib qho tseem ceeb tshaj ntau lwm cov alloys.

Ua tsis tau zoo hauvmuaj zog oxidizing acids(piv txwv li, nitric acid, concentrated sulfuric acid) thiab txo cov kua qaub zoo li hydrochloric acid, qhov twg nws cov ntsiab lus tooj liab nrawm nrawm nrawm nrawm.

Yog raug rau scc hauvaerated, high-temperature (>60℃/ 140℃f) chloride daws, txwv nws siv nyob rau hauv cov xwm txheej zoo li no.

3. Cov Khoom Siv Kho Tshuab

Lawv lub cev coj cwj pwm sib txawv, cuam tshuam rau lawv txoj kev haum rau cov qauv lossis load-cov kab ntawv siv:

Ntiag tug	Hastelloy C276 (Anealed)	Alloy 400 (anealed)
Lub zog tensile	~ 700 mpa (~ 101,500 psi)	~ 550 MPa (~ 79,800 psi)
Tawm Zog (0.2% offset)	~ 300 mpa (~ 43,500 psi)	~ 24 MPa (~ 34,800 psi)
Elongation	~40%	~40%
Hardness (Rockwell B)	~90	~80

Hastelloy C276Muaj ntau dua lub zog thiab ua rau nws haum rau kev siv ntxhov siab ntawm kev ntxhov siab ntawm cov chaw kub. Nws lub zog tseem nyob ruaj khov ntawm qhov kub txog ~ 815 kawm tiav (1,500℃f), nrog zoo creep resistance.

Alloy 400Muaj lub zog nruab nrab tab sis kev du me me, ua kom yooj yim rau daim ntawv (xws li khoov, tshuab xaws). Txawm li cas los xij, nws lub zog ntws tawm ntau dua 315℃(600℃f), txwv kev siv siab-ntsuas kub.

4. Kev ua haujlwm siab-kub

Hastelloy C276yog tsim rau kev pab kub siab:

Ua rau oxidation thiab sulfidation txog ~ 1,093℃(2,000℃f).

Ua kom muaj kev siv tshuab ua neeg txawj ntse nyob rau hauv cov ntsuas kub-kub-kho kom haum (piv txwv, roj av, cov tshuaj tiv thaiv tshuaj lom neeg).

Alloy 400Muaj tsawg-qhov kub muaj peev xwm:

Oxidizes sai dua saum toj no ~ 538℃(1,000℃F) vim nws cov ntsiab lus chromium tsawg.

Poob lub zog loj heev ntawm qhov kub tshaj 315℃(600℃f), ua rau nws tsis zoo rau kev coj ua kub-kub.

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5. Kev thov

Lawv cov khoom siv sib txawv tsav txoj kev siv divergent siv cov xwm txheej:

Hastelloy C276

Tshuaj lom neeg: cov tshuaj tiv thaiv, cov li qub, thiab cov piping rau tuav cov muaj zog acids muaj zog (HCL, hyso₄) thiab chloride-rice dej.

Aerospace: kev sib txuas ua ke, tso pa tawm, thiab kev hloov cua sov.

Kev tsim kho kom ib puag ncig: cov khoom siv pov tseg rau cov kua qaub lossis chlorinated effluents.

Roj thiab roj: Cov khoom siv hauv plawv thiab cov cuab yeej siv tawm ntawm cov kab xeb corrosive.

Alloy 400

Marine Engineering: Dej hiav txwv li cas, twj, thiab hull fittings (tiv taus dej hiav txwv chloride SCC).

Tshuaj lom neeg: Cov khoom siv rau HF tuav, cov tshuaj lom, thiab cov khoom noj yog cov acids (piv txwv li, acetic acid).

Automotive: Roj Tso Tsheb Hlau Luam thiab Cov Kab (tiv taus roj av thiab dej cawv).

Cov khoom siv hluav taws xob: cov hluav taws xob sib xyaw (kev ua tau zoo thiab corrosion tsis kam nyob rau ib puag ncig me me).

6. Nqi thiab tshuab luam ntawv

Tus nqi: Hastelloy C276 yog kim dua li alloy 400 vim nws cov molybdenum thiab tungsten cov ntsiab lus (Molysten cov ntsiab lus (Molybdenum yog ~ 5x ntau dua li tooj liab).

Luam ntawv: Ob alloys tau txiav txim siab "nyuaj" rau lub tshuab vim ua haujlwm tawv, tab sis alcoy 400 yog yooj yim me ntsis dua c276. C276's High Molybdenum thiab Tungsten Nce cov cuab yeej hnav, xav tau cov txheej txheem machining.

Hastelloy C276 thiab Alloy 400 yog tshwj xeeb Nickel-raws li cov alloys ua kom zoo rau cov chaw sib txawv:

C276Dominates nyob rau hauv loj txo / oxidizing corrosive cov xwm txheej thiab kev kub siab, ua rau nws zoo tagnrho rau cov kev thov muaj kev lag luam huab thiab iberospace.

Alloy 400Exfels nyob rau hauv kev loj, nruab nrab-rau-me ntsis-corrosive ib puag ncig (piv txwv li, dej hiav txwv, HF) thiab muab cov nqi thiab cov qauv zoo rau cov kev siv tau tsawg dua.

Qhov kev xaiv nruab nrab ntawm lawv nyob ntawm qhov tshwj xeeb corrosive media, kub, cov neeg kho tshuab thauj, thiab nyiaj txiag kev txwv ntawm daim ntawv thov.