Nickel Alloys vs Stainless Hlau: Qhov txawv ntawm qhov tseem ceeb, cov khoom siv, thiab kev siv tshuab

Nickel alloysthiabstainless hlauyog ob qho tib si dav siv corrosion-tiv taus, siab- cov khoom siv hlau muaj zog hauv kev lag luam. Thaum xaiv cov khoom lag luam, cov kws tsim khoom thiab cov neeg yuav khoom feem ntau ntsib cov lus nug tseem ceeb: peb yuav tsum xaiv cov nickel alloys lossis stainless hlau? Txawm li cas los xij, ob qho tib si sib txawv hauv qhov muaj pes tsawg leeg, cov khoom tseem ceeb, thiab cov xwm txheej siv tau. Kab lus no yuav qhia txog qhov sib txawv ntawm cov nickel alloys thiab stainless hlau los ntawm tsib yam: kev khiav hauj lwm kub, tshuaj muaj pes tsawg leeg, corrosion kuj, daim ntaub ntawv, thiab nqi.

Ua ntej, los ntawm cov tshuaj muaj pes tsawg leeg pom, stainless hlau feem ntau yog ferroalloy; Monel, ferrochromium-nickel, thiab Hastelloy yog npib tsib xee alloys.

Cov khoom tseem ceeb ntawm cov hlau tsis muaj hlau yog hlau, nrog cov ntsiab lus hlau ntau tshaj 65%, thiab qee qhov ferritic thiab martensitic stainless hlau txawm ncav cuag ntau dua 80%. Hauv qhov sib piv, nickel alloys feem ntau muaj cov ntsiab lus hlau hauv qab 50%. Qee cov nickel alloys, xws li Hastelloy C-2000, muaj cov ntsiab lus hlau txawm tias qis dua 3%.

Hais txog cov ntsiab lus npib tsib xee, cov nickel alloys feem ntau muaj cov ntsiab lus nickel ntau dua 30%, qee qhov ntau tshaj 70%. Stainless hlau, ntawm qhov tod tes, muaj cov ntsiab lus nickel tsawg dua 30%, thiab qee qhov ferritic thiab martensitic stainless hlau tsis muaj nickel txhua.

Ob leeg stainless hlau thiab npib tsib xee alloys muaj kwv yees li 20% chromium. Chromium yog ib qho zoo heev corrosion inhibitor thiab yog lub hauv paus ntawm corrosion kuj ntawm stainless hlau thiab npib tsib xee alloys.

Kev khiav hauj lwm kub yog qhov sib txawv loj tshaj plaws ntawm stainless hlau thiab npib tsib xee alloys. Feem ntau, stainless hlau feem ntau yog siv nyob rau hauv chav tsev kub daim ntaub ntawv, thaum npib tsib xee alloys feem ntau yog siv nyob rau hauv siab - kub ib puag ncig. Ib qho tseem ceeb tshaj plaws uas txiav txim siab tus yam ntxwv no yog cov ntsiab lus nickel. Vim tias cov hlau tsis tuaj yeem tuav cov qauv ruaj khov ntawm qhov kub thiab txias, nws yog ib qho nyuaj rau lav qhov siab - qhov kub thiab txias kev ua haujlwm ntawm stainless hlau, uas feem ntau yog tsim los ntawm hlau.

Nickel, ntawm qhov tod tes, zoo kawg nkaus tswj cov qauv austenitic ntawm cov hlau ntawm qhov kub thiab txias; tsuas yog npib tsib xee-raws li alloys ua tau zoo ntawm qhov kub thiab txias. Txawm hais tias npib tsib xee kuj muaj nyob rau hauv qee cov austenitic stainless hlau, lawv cov ntsiab lus nickel tseem tsawg heev.

Tsis tas li ntawd,Monel alloysfeem ntau siv nyob rau hauv chav tsev kub vim hais tias corrosion kuj ntawm tooj liab txo nyob rau hauv high kub.

Nickel, chromium, thiab molybdenum yog cov ntsiab lus tseem ceeb uas txiav txim siab corrosion tsis kam ntawm stainless hlau thiab npib tsib xee alloys.

Nickel thiab molybdenum yog qhov sib txawv tiag tiag ntawm nickel alloys thiab stainless hlau. Nickel nws tus kheej yog ib qho zoo heev corrosion-cov khoom tiv taus; Tsis zoo li hlau, uas corrodes yooj yim nyob rau hauv huab cua, npib tsib xee alloys lawm muaj ib tug zoo lub hauv paus rau corrosion kuj dua stainless hlau.

Chromium tsim ib zaj duab xis oxide ntawm cov hlau nto thaum nws los rau hauv kev sib cuag nrog oxygen. Qhov no oxide zaj duab xis zoo tiv thaiv ntxiv oxidation ntawm cov hlau. Qhov sib txawv ntawm chromium cov ntsiab lus ntawm nickel alloys thiab stainless hlau tsis tseem ceeb; ob qho tib si nthuav tawm oxidation zoo heev.

Molybdenum yog cov khoom siv hlau uas muaj kev tiv thaiv zoo los txo cov corrosion. Piv nrog rau cov hlau tsis muaj hlau, nickel alloys feem ntau muaj cov ntsiab lus molybdenum ntau dua. Ib qho kev sib raug zoo nrog cov ntsiab lus molybdenum siab yog Hastelloy B-3, uas muaj cov ntsiab lus molybdenum siab txog 30%. Nyob rau hauv cov ntsiab lus, nickel alloys yog superior rau stainless hlau nyob rau hauv cov nqe lus ntawm tag nrho cov corrosion kuj.

Stainless hlau

Nikle alloy

Nickel alloys thiab stainless hlau muaj ntau daim ntawv thov sib tshooj vim tias lawv yog ob qho tib si corrosion-cov alloys resistant. Txawm li cas los xij, muaj peb qhov sib txawv tseem ceeb hauv lawv daim ntawv thov:

1. Stainless hlau tsis haum rau siab - kub daim ntawv thov, thaum lub siab tshaj - cov ntawv thov kub yuav tsum tau nickel alloys, xws li cav, nuclear fais fab nroj tsuag reactors, thiab cov roj tob.

2. Stainless hlau muaj kev siv dav hauv pej xeem, xws li cov tais diav, khoom siv kho mob, thiab kev tsim kho. Nickel alloys feem ntau yog siv rau hauv kev lag luam thiab kev siv tub rog.

3. Lub corrosion kuj ntawm stainless hlau yog txwv rau oxidizing ib puag ncig. Yog hais tias qhov corrosive ib puag ncig ua tshwj xeeb thiab complex, feem ntau stainless hlau tsis tuaj yeem tiv taus xws li corrosion.

Ua ntej, nickel alloys tseem kim dua li cov hlau tsis muaj steel vim yog tus nqi sib txawv ntawm nickel thiab hlau.

Thib ob, npib tsib xee alloys feem ntau muaj cov ntsiab lus molybdenum siab dua, thiab molybdenum yog ob peb zaug kim dua npib tsib xee. Raws li ib txwm muaj, cov nickel alloys muaj zog dua li cov hlau tsis muaj steel, uas ua rau lawv nyuaj rau kev ua haujlwm. Qhov kev nyuaj siab ntxiv no yog lwm qhov tseem ceeb uas ua rau lawv tus nqi siab dua.

Thaum kawg, ntau qhov sib xyaw ua ke ntawm nickel alloys, kev tswj hwm nruj dua cov kab lus, thiab cov kev xav tau siab dua rau cov khoom siv raw indirectly nce lawv cov nqi.

Ob leeg stainless hlau thiab npib tsib xee alloys yog corrosion{0}} cov ntaub ntawv tiv taus. Feem ntau,npib tsib xee alloysoutperform stainless hlau. Qhov sib txawv tseem ceeb nyob hauv lawv qhov chaw ua haujlwm: stainless hlau feem ntau yog siv nyob rau hauv chav tsev kub, thaum nickel alloys feem ntau siv rau qhov kub thiab txias. Lawm, qhov kev ua tau zoo tshaj ntawm nickel alloys los ntawm tus nqi siab dua. Cov neeg siv khoom tuaj yeem xaiv cov khoom tsim nyog tshaj plaws raws li lawv cov peev nyiaj thiab kev xav tau.