Vim li cas Nickel Raws Li Alloys?

Nickel-based Alloys

Npib tsib xee alloys tseem raug xa mus ua ni-based superalloys vim lawv lub zog zoo, tiv tshav kub kub thiab corrosion kuj. Ntsej muag-xim ntsej muag ntsej muag qauv yog qhov sib txawv ntawm ni-based alloys txij li cov xaim hluav taws xob ua haujlwm ua tus stabilizer rau austenite.

Cov tshuaj lom neeg ntxiv rau cov khoom siv npib tsib xee alloys yog chromium, cobalt, molybdenum, hlau thiab tungsten.

Inconel® thiab Hastelloy® Nickel-based Alloys

Ob ntawm cov feem tsim cov npib tsib xee alloys tsev neeg yog Inconel® thiab Hastelloy®. Lwm cov lag luam uas tseem ceeb yog Waspaloy®, Allvac® thiab General Electric®.

Feem ntau Inconel® npib tsib xee alloys yog:

• Inconel® 600, 2.4816 (72% Ni, 14-17% Cr, 6-10% Fe, 1% Mn, 0.5% Cu): Nickel-chrome-hlau alloy uas qhia tau zoo tshaj plaws nyob rau qhov ntsuas kub. Ruaj thaiv cov tshuaj chlorine thiab chlorine dej.
• Inconel® 617, 2.4663 (Nickel sib npaug, 20-23% Cr, 2% Fe, 10-13% Co, 8-10% Mo, 1.5% Al, 0.7% Mn, 0.7% Si): Cov alloy no ua ntau ntawm cov npib tsib xee , chrome, cobalt thiab molybdenum qhia txog lub zog siab thiab kub ua hauj.
• Inconel® 718 2.4668 (50-55% Ni, 17-21% Cr, Sib npaug hlau, 4.75-5.5% Nb, 2.8-3.3% Mo, 1% Co,): Ib qho nyuaj nickel-chrome-iron-molybdenum alloy uas yog paub txog nws txoj kev ua haujlwm zoo thiab cov cuab yeej zoo sib xws thaum tsis kub.

Hastelloy® npib tsib xee alloys paub rau lawv qhov kev tawm tsam tiv thaiv cov kua qaub. Cov feem ntau tsis muaj xws li:

• Hastelloy® C-4, 2.4610 (Nickel tshuav nyiaj, 14.5 - 17.5% Cr, 0 - 2% Co, 14 - 17% Mo, 0 - 3% Fe, 0 - 1% Mn): C-4 yog npib tsib xee- chrome-molybdenum alloy uas yog thov nyob rau hauv thaj chaw ib puag ncig muaj cov kua qaub inorganic.
• Hastelloy® C-22, 2.4602 (Nickel tshuav nyiaj, 20 -22.5% Cr, 0 - 2.5% Co, 12.5 - 14.5% Mo, 0 - 3% Fe, 0-0.5% Mn, 2.5-3.5 W): C- 22 yog xeb tiv taus nickel-chrome-molybdenum-tungsten alloy uas qhia tau zoo tiv thaiv cov kua qaub.
• Hastelloy® C-2000, 2.4675 (Tshuav nyiaj npib tsib xee, 23% Cr, 2% Co, 16% Mo, 3% Fe): C-2000 yog siv rau hauv ib puag ncig nrog cov tshuaj tua kabmob oxidants, xws li sulfuric acid thiab ferric chloride.

♦ Txhim kho qhov ua tau ntev ntawm cov npib tsib xee ua haujlwm

Npib tsib xee alloys paub txog lawv cov yam ntxwv zoo xws li kev tiv thaiv corrosion thiab siab kub. Txawm li cas los xij, yuav luag tsis muaj ib qho kev ua haujlwm tuaj yeem ntev mus ib txhis, tsis muaj teeb meem zoo li cas ntawm cov khoom siv. Txhawm rau rub lub neej ntev ntawm qhov chaw, nickel raws li alloys tuaj yeem kho nrog BoroCoat®, peb cov kev kho mob sib txawv kom txhim kho kev txhim kho corrosion thiab hnav tsis kam kuj tseem ntxiv kom muaj kev ruaj khov tiv thaiv oxidants.

Cov txheej txheem diffusion ntawm BoroCoat ® txhim kho qhov chaw tawv txog li 2600 HV thaum tswj hwm txheej diffusion ntawm 60 µm. Cov coj tsis kam yog qhov ntsuas txhim kho, raws li muaj pov thawj los ntawm tus pin ntawm kev xeem disc. Thaum hnav qhov tob ntawm kev tsis siv npib tsib xee alloys nce lub sijhawm ntev dua tus pin tig, ni-based alloys nrog BoroCoat® cov lus qhia tsis tshua muaj kev hnav qhov tob thoob plaws qhov kev xeem.

♦ Thaj Chaw Ntawm Cov Ntawv Thov

Alloys nrog nickel hauv paus yog feem ntau siv rau hauv qhov chaw muaj kev sib tw uas xav tau zoo tiv thaiv kev kub thiab qis kub, oxidation / corrosion thiab siab zog. Qhov no yog vim li cas cov ntawv thov suav nrog tab sis tsis txwv rau: kev tsim kho lub tshuab hluav taws xob, tshuab tsim hluav taws xob, kev lag luam chemical, kev tsim kho aerospace thiab li qub / fittings.

 Li ntawm 60% ntawm nickel hauv lub ntiaj teb tas li kev ua cov thooj ntawm cov hlau tsis huv. Nws raug xaiv vim nws lub zog, tawv thiab tsis kam tiv thaiv. Duplex stainless steels feem ntau muaj li 5% npib tsib xee, austenitics ncig 10% npib tsib xee, thiab super austenitics tshaj 20%. Cov tshuaj tiv thaiv tshav kub feem ntau muaj li ntawm 35% npib tsib xee. Npib tsib xee alloys feem ntau muaj 50% npib tsib xee lossis ntau dua.