Chifukwa chiyani Nickel Based Alloys?

Alloys ofotokoza faifi tambala

Alloys ofotokoza faifi tambala amatchulidwanso kuti superalloys ya ni chifukwa cha mphamvu yawo yayikulu, kutentha kwa kutentha ndi kukana kwa dzimbiri. Kapangidwe kamakristalo koyang'ana nkhope ndichinthu chosiyana kwambiri ndi ma alloys omwe ali ndi ma niel popeza nickel imagwira ntchito yolimbitsa austenite.

Zowonjezera zomwe zimapangidwa ndi ma alloys opangidwa ndi faifi tambala ndi chromium, cobalt, molybdenum, iron ndi tungsten.

Alloys ofotokoza a Inconel® ndi Hastelloy® Nickel

Mabanja awiri okhazikika omwe ali ndi ma nickel ndi Inconel® ndi Hastelloy®. Opanga ena odziwika ndi Waspaloy®, Allvac® ndi General Electric®.

Ma alloys ofala kwambiri amtundu wa Inconel® ndi awa:

• Inconel® 600, 2.4816 (72% Ni, 14-17% Cr, 6-10% Fe, 1% Mn, 0.5% Cu): Nickel-chrome-iron alloy yomwe imawonetsa kukhazikika pamlingo wotentha kwambiri. Khola lolimbana ndi chlorine ndi madzi a chlorine.
• Inconel® 617, 2.4663 (Nickel balance, 20-23% Cr, 2% Fe, 10-13% Co, 8-10% Mo, 1.5% Al, 0.7% Mn, 0.7% Si): Chitsulo ichi chimapangidwa ndi faifi tambala , chrome, cobalt ndi molybdenum imawonetsa mphamvu yayikulu komanso kukana kutentha.
• Inconel® 718 2.4668 (50-55% Ni, 17-21% Cr, Iron balance, 4.75-5.5% Nb, 2.8-3.3% Mo, 1% Co,): Cholimba cha nickel-chrome-iron-molybdenum alloy chomwe ndi amadziwika chifukwa chogwira ntchito bwino komanso makina abwino kwambiri pamatentha otsika.

Alloys ofotokoza za Hastelloy® amadziwika ndi kukana kwawo ma acid. Zomwe zimafala kwambiri ndi izi:

Hastelloy® C-4, 2.4610 (Nickel balance, 14.5 - 17.5% Cr, 0 - 2% Co, 14 - 17% Mo, 0 - 3% Fe, 0 - 1% Mn): C-4 ndi faifi tambala- aloyi chrome-molybdenum omwe amagwiritsidwa ntchito m'malo omwe ali ndi ziwalo zachilengedwe.
• Hastelloy® C-22, 2.4602 (Nickel balance, 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 ndi aloyi wosagwira dzimbiri-chrome-molybdenum-tungsten alloy omwe amawonetsa kulimbikira motsutsana ndi zidulo.
• Hastelloy® C-2000, 2.4675 (Nickel balance, 23% Cr, 2% Co, 16% Mo, 3% Fe): C-2000 imagwiritsidwa ntchito m'malo okhala ndi ma oxidants aukali, monga sulfuric acid ndi ferric chloride.

♦ Kupititsa patsogolo ntchito zopangira faifi tambala

Alloys ofotokoza faifi tambala amadziwika ndi makina awo abwino monga kukana dzimbiri komanso kutentha kwambiri. Komabe, palibe chidutswa chilichonse chantchito chomwe chingakhaleko kwamuyaya, ngakhale zitakhala zokongola bwanji. Kutalikitsa kutalika kwa nthawi yayitali yazitsulo, ma alloys opangidwa ndi faifi tambala amatha kuchiritsidwa ndi BoroCoat®, chithandizo chathu chothandizira kuti dzimbiri liziwonongeka komanso kuvala komanso kuti likhale lolimba motsutsana ndi ma oxidants.

Magawo ofalikira a BoroCoat® amakulitsa kuwuma kwapansi mpaka 2600 HV pomwe amakhala ndi 60 layerm yosanjikiza. Kulimbana ndi kuvala kumakhala bwino kwambiri, monga zimatsimikiziridwa ndi pini pakuyesa kwa disc. Ngakhale kukula kwa ma alloys osatetezedwa ndi faifi tambala kumawonjezera kutalika komwe pini imazungulira, ma alloys omwe ali ndi N ndi BoroCoat® amawonetsa kuzama kokhazikika pamayeso onse.

♦ Madera Othandizira

Alloys okhala ndi faifi tambala nthawi zambiri amagwiritsidwa ntchito m'malo ovuta omwe amafunika kulimbana bwino ndi kutentha ndi kutsika, makutidwe ndi okosijeni / dzimbiri komanso mphamvu yayikulu. Ichi ndichifukwa chake ntchito zimaphatikizira koma sizimangokhala pa: uinjiniya wa turbine, ukadaulo wamagetsi, makampani opanga mankhwala, zomangamanga zamagetsi ndi mavavu / zovekera.

 Pafupifupi 60% ya faifi tambala padziko lapansi imatha kukhala gawo lazitsulo zosapanga dzimbiri. Amasankhidwa chifukwa champhamvu zake, kulimba kwake, komanso kukana kwake ndi dzimbiri. Zitsulo zosapanga dzimbiri zopangidwa ndi Duplex zimakhala ndi 5% ya faifi tambala, austenitics pafupifupi 10% faifi tambala, komanso akatswiri opitilira muyeso opitilira 20%. Kutentha kosagwira nthawi zambiri kumakhala ndi 35% ya faifi tambala. Ma alloys okhala ndi faifi tambala amakhala ndi faifi tambala 50% kapena kuposa.