Li-alloys tsa setso li bapala karolo e tloaelehileng tlhahisong ea litšepe, ebang ke tšepe e sa hloekang e sebelisoang lisebelisoa tsa bongaka kapa lijong tsa leoatleng, leha e le efe ea meloko ea litšepe tse sebetsang hantle tse entsoeng lilemong tse mashome a seng makae tse fetileng bakeng sa indasteri ea likoloi, kapa tšepe e kang aluminium le aluminium. titanium.tse nang le karo-karolelano ea matla ho boima ba 'mele le khanyetso e phahameng ea kutu li etsa hore e tšoanelehe ka ho khetheha bakeng sa lits'ebetso tsa sebaka sa sefofane, ho hloekisa oli le indastering ea lik'hemik'hale.
Hoa tšoana le ho li-alloys tse ling tsa carbon steel, haholo-holo li-alloys tse nang le lintho tse itseng tsa carbon le manganese.Ho itšetlehile ka palo ea likarolo tsa alloying, tse ling tsa tsona li loketse hantle ho etsoaflanges, lisebelisoaleliphaephelik'hemik'hale le oli ea ho hloekisa.Kaofela li na le ntho e le 'ngoe e tšoanang: lisebelisoa tse sebelisoang lits'ebetsong tsena li tlameha ho ba ductile e lekaneng ho mamella brittle fracture le stress corrosion cracking (SCC).
Mekhatlo ea maemo e kang American Society of Manufacturing Engineers (ASME) le ASTM Intl.(eo pele e neng e tsejoa e le American Society for Testing and Materials) e fana ka tataiso tabeng ena.Likhoutu tse peli tse amanang le indasteri-ASME Boilerle Pressure Vessel (BPVD) Karolo VIII, Karolo 1, le ASME B31.3, Process Piping - aterese carbon steel (ntho leha e le efe e nang le 0.29% ho 0.54% carbon le 0.60% ho 1.65% manganese, tšepe e nang le thepa).e tenyetseha ka ho lekaneng bakeng sa ho sebelisoa maemong a leholimo a chesang, libaka tse futhumetseng le mocheso o tlase ho -20 degrees Fahrenheit.Leha ho le joalo, litšitiso tsa morao-rao mochesong oa tikoloho li lebisitse tlhahlobong e haufi ea lichelete le likarolo tsa likarolo tse fapaneng tsa microalloying tse sebelisitsoeng ho etsa li-flanges tse joalo, li-fittings le. lipeipi tsa tšepe tsa api.
Ho fihlela morao tjena, ha ho ASME kapa ASTM e neng e hloka tlhahlobo ea tšusumetso ho netefatsa ductility ea lihlahisoa tse ngata tsa carbon steel tse sebelisoang mocheso o tlase ho -20 degrees Fahrenheit.Qeto ea ho qhelela ka thoko lihlahisoa tse itseng e ipapisitse le thepa ea nalane ea thepa.Mohlala, ha mocheso o tlase oa moralo oa tšepe (MDMT) e le -20 degrees Fahrenheit, ha e lokolohe litekong tsa phello ka lebaka la karolo ea eona ea setso lits'ebetsong tse joalo.
Nako ea poso: Apr-19-2023