Uas yog qhov zoo dua, C22 lossis C276 Alloy

1.What yog qhov sib txawv ntawm C22 thiab C276 Alloy Alloy?

Hastelloy C22 thiab C276 yog ob qho tib si nickel-based superalloys hauv tsev neeg haastelloy, tab sis lawv txawv rau corrosition, tab sis lawv txawv nyob rau hauv muaj pes tsawg leeg, kev ua tau zoo, thiab cov ntawv thov zoo tagnrho. Ntawm no yog cov ncauj lus piav qhia:

A. Tshuaj lom neeg muaj pes tsawg leeg

Thawj qhov chaw sib txawv nyob hauv lawv cov chromium, molybdenum, thiab tungsten cov ntsiab lus, uas ncaj qha rau lawv cov khoom:

Lub ntsiab	Hastelloy C22	Hastelloy C276
Npib tsib caug (ni)	56% (yam tsawg kawg nkaus)	57% (tsawg kawg nkaus)
Chromium (cr)	20–22%	14.5–16.5%
Molybdenum (mo)	12–14%	15–17%
Tungsten (w)	2.5–3.5%	3–4%
Hlau (FE)	2–6%	4–7%
Cobalt (CO)	Tsawg dua los yog sib npaug rau 2.5%	Tsawg dua los yog sib npaug rau 2.5%
Carbon (c)	Tsawg dua los yog sib npaug rau 0.015%	Tsawg dua los yog sib npaug rau 0.01%

B. Corrosion Kuj

Hastelloy C22:

Siab dua cov ntsiab lus chromium (20-22%) txhim kho kom tsis txhoboxidizing ib puag ncig(xws li, nitric acid, hypochlorites, thiab siab-kub oxidizing acids).

Cov kev ua tau zoo hauv cov sib xyaw ua ke (piv txwv li kev sib txuas ua ke ntawm sulfuric, nitric, thiab hydrochloric acids) vim yog ntsuas hluav taws xob chromium thiab molybdenum.

Zoo tshaj qhov tsis haum corrosion (pitting, corrosion corrosion) hauv chloride ib puag ncig piv rau C276, tshwj xeeb tshaj yog thaum nce qhov kub.

Hastelloy C276:

Siab dua molybdenum thiab tungsten cov ntsiab lus txhim kho kom tsis txhobtxo qhov chaw(xws li, sulfuric acid, phosphoric acid, thiab hydrogen chloride roj).

Zoo heev rau General corrosion nyob rau hauv kev nyab xeeb tshuaj noj tab sis kuj tsis tshua ua tau zoo dua li C22 hauv cov kev mob oxidizing muaj zog (piv txwv li, concentrated nitric acid).

C. Cov Khoom Siv Kho Mob

Lub zog: Ob lub alloys muaj lub zog zoo sib xws (~ 690 mpa) thiab tawm lub zog (~ 275 mpa) ntawm chav tsev kub. Txawm li cas los xij, C276 khaws cov me ntsis zoo dua me ntsis hauv huab txias, Thaum C22 muaj cov ntxau zoo dua ntawm cov kub (txog 1,000 degree).

Hwj txwv: C22 tau txo cov ntsiab lus cov pa roj carbon, txo txoj kev pheej hmoo ntawm carbide nag lossis ua kom nws ntau weld-phooj ywg. C276 yuav tsum tau ceev faj txog kev kho cua sov tom qab

D. Daim ntaub ntawv thov

Hastelloy C22:

Zoo tagnrho rauoxidizing lossis sib xyaw acid ib puag ncig: Tshuaj lom neeg (piv txwv li, cov ntawv tshuaj dawb, tshuaj kho (tshuab ntxhua khaub ncaws, cov pa roj hmab), thiab cov khoom siv ua pa), thiab cov cuab yeej siv tawm tsam, cov cuab yeej siv tawm ntawm cov tshuaj tua kab mob.

Nyiam nyob rau hauv kev lag luam uas nquag vuam lossis raug rau oxidizing cov neeg sawv cev (piv txwv li, hypochlorite cov ntsiab lus) muaj ntau.

Hastelloy C276:

Txawj rau hauvtxo qhov chaw: Roj thiab roj ua (downhole cov cuab yeej siv, sour roj tuav), tshuaj kuab tshuaj huv (cov pa paug

Dav siv nyob rau hauv cov kab yees ua raws li nws lub koob npe nrov ntev thiab muaj.

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2. Qhov twg yog qhov zoo dua: C22 lossis C276?

Yog tsis muaj universal "zoo dua" alloy-lawv kev ua tau zoo nyob ntawm tusib puag ncig thiab daim ntawv thov:

Xaiv C22 yog:

Ib puag ncig cuam tshuamoxidizing cov neeg sawv cev(xws li, nitric acid, hypochlorites) lossis cov kua qaub sib xyaw.

Cheeb tsam corrosion (pitting / crevice) hauv cov chaw siab chloride (piv txwv li, dej hiav txwv, brines) yog kev txhawj xeeb.

Weldability thiab tshaj tawm-weld corrosion tsis kam yog qhov tseem ceeb (piv txwv li, cov khoom sib xyaw ua ke).

Xaiv C276 Yog:

Daim ntawv thov yuav tsum tau ua rautxo cov neeg sawv cev(xws li, sulfuric acid, hydrogen chloride).

Qhov chaw ib puag ncig yog tsawg oxidizing, thiab tus nqi lossis muaj txiaj ntsig yog qhov tseem ceeb (C276 feem ntau muaj ntau ntau ntxiv).

Kev khiav hauj lwm kub yog qhov mob me, thiab oxidizing tej yam kev mob tsis tuaj.

Hauv cov ntsiab lus, C22 muaj cov corrosion tsis kam nyob rau hauv oxidizing thiab sib xyaw ib puag ncig, thaum C276 muaj tshwj xeeb rau kev txo cov mob. Qhov "zoo dua" kev xaiv hinges ntawm txuam cov alloy cov yam ntxwv rau cov tshuaj tshwj xeeb, thiab siv kho tshuab, thiab siv kho txhua yam thiab siv kho tshuab, thiab siv kho txhua yam thiab siv kho txhua yam.