INCOLOY 825 (UNS N08825 / NS142)

Aloyi 825 ndi austenitic nickel-iron-chromium alloy yomwe imatanthauzidwanso ndi zowonjezera za molybdenum, mkuwa ndi titaniyamu. Linapangidwa kuti lipereke kukana kwapadera kumadera ambiri owononga, onse oxidizing ndi kuchepetsa.

Aloyi 825 idapangidwa kuti ipereke kukana kwapadera kumadera ambiri owononga, oxidizing ndi kuchepetsa. Ndi nickel zomwe zili pakati pa 38% -46%, kalasi iyi ikuwonetsa kukana kupsinjika kwa corrosion cracking (SCC) yopangidwa ndi ma chlorides ndi alkalis. Mafuta a faifi ndi okwanira kukana chloride-ion stress-corrosion cracking. Nickel, molumikizana ndi molybdenum ndi mkuwa, imaperekanso kukana kwambiri kumachepetsa malo monga omwe ali ndi sulfuric ndi phosphoric acid.

Zomwe zili mu chromium ndi molybdenum zimaperekanso kukana kwabwino kwa pitting m'malo onse kupatulapo njira zopangira oxidizing chloride. Imagwiritsidwa ntchito ngati chinthu chothandiza m'malo osiyanasiyana, aloyi 825 imakhala ndi zida zabwino zamakina kuchokera ku kutentha kwa cryogenic mpaka 1,000 ° F.

Kuphatikizika kwa titaniyamu kumalimbitsa Aloyi 825 motsutsana ndi kukhudzika komwe kumapangitsa kuti aloyiyo isagonjetse kuukira kwa intergranular pambuyo pokumana ndi kutentha kosiyanasiyana komwe kungalimbikitse zitsulo zosapanga dzimbiri zosakhazikika. Kupangidwa kwa Alloy 825 ndikofanana ndi ma aloyi a nickel-base, okhala ndi zinthu zowoneka bwino komanso zowotcherera pogwiritsa ntchito njira zosiyanasiyana.

Zinthuzi zimakhala ndi mawonekedwe abwino kwambiri, ofanana ndi ma nickel-base alloys, zomwe zimapangitsa kuti zinthuzo zikhale zopindika mpaka ma radii ang'onoang'ono. Annealing pambuyo kupinda si bwino.

Ndizofanana ndi aloyi 800 koma zathandizira kukana dzimbiri zamadzimadzi. Imalimbana kwambiri ndi kuchepetsa komanso ma oxidizing zidulo, kupsinjika-kusweka kwa dzimbiri, komanso kuukira komweko monga kugwetsa ndi dzimbiri. Aloyi 825 imalimbana makamaka ndi sulfuric ndi phosphoric acid. Chitsulo cha faifi tambalachi chimagwiritsidwa ntchito pokonza mankhwala, zida zowongolera kuipitsidwa, mapaipi amafuta ndi gasi, kukonzanso mafuta a nyukiliya, kupanga asidi, ndi zida zonyamula.