Ama-alloys endabuko adlala indima ejwayelekile ekukhiqizweni kwezinsimbi, kungakhathaliseki ukuthi insimbi engagqwali esetshenziswa emishinini yezokwelapha noma ekudleni kwasolwandle, noma yiziphi izizukulwane zezinsimbi ezisebenza kahle kakhulu ezathuthukiswa emashumini ambalwa eminyaka adlule embonini yezimoto, noma izinsimbi ezifana ne-aluminium nensimbi. titanium.ezinesilinganiso esiphakeme samandla kuya kwesisindo kanye nokumelana nokugqwala okuphezulu kuyenza ifaneleke ngokukhethekile ukusetshenziswa ezimbonini ze-aerospace, zokucwenga uwoyela nezimboni zamakhemikhali.
Okufanayo kusebenza kwamanye ama-alloys ensimbi ye-carbon, ikakhulukazi ama-alloys anokuqukethwe okuthile kwekhabhoni ne-manganese.Ngokuya ngenani lezakhi ze-alloying, ezinye zazo zifaneleka kahle ukwenziwaama-flange, okokufakafuthiamapayipiezindaweni zokuhluza amakhemikhali namafutha.Bonke banento eyodwa abafana ngayo: izinto ezisetshenziswa kulezi zicelo kumele zibe i-ductile ngokwanele ukuze zimelane nokuqhekeka kwe-brittle and stress corrosion cracking (SCC).
Izinhlangano zamazinga ezifana ne-American Society of Manufacturing Engineers (ASME) kanye ne-ASTM Intl.(ngaphambilini eyayaziwa ngokuthi i-American Society for Testing and Materials) inikeza isiqondiso mayelana nalokhu.Amakhodi amabili emboni ahlobene-I-boiler ye-ASMEkanye ne-Pressure Vessel (BPVD) Isigaba VIII, Isigaba 1, kanye ne-ASME B31.3, I-Process Piping - ikheli le-carbon steel (noma yini equkethe u-0.29% kuya ku-0.54% wekhabhoni kanye no-0.60% kuya ku-1.65% we-manganese, izinto eziqukethe insimbi).ivumelana nezimo ngokwanele ukuba isetshenziswe ezindaweni ezishisayo, ezifundeni ezipholile namazinga okushisa aphansi njenge -20 degrees Fahrenheit.Kodwa-ke, ukwehluleka kwakamuva kumazinga okushisa okuzungezile kuye kwaholela ekuhlolweni okuseduze kwamanani nezilinganiso zezinto ezihlukahlukene ze-microalloying ezisetshenziswa ekwenzeni ama-flange anjalo, okokufaka kanye nokulinganisa. amapayipi ensimbi api.
Kuze kube muva nje, akukho i-ASME noma i-ASTM ebidinga ukuhlolwa komthelela ukuze kuqinisekiswe ukudungeka kwemikhiqizo eminingi ye-carbon steel esetshenziswa emazingeni okushisa aphansi afika ku--20 degrees Fahrenheit.Isinqumo sokungabandakanyi imikhiqizo ethile sisekelwe ezintweni zomlando zezinto.Isibonelo, uma izinga lokushisa elincane ledizayini yensimbi (MDMT) lingu -20 degrees Fahrenheit, liyakhululwa ekuhlolweni komthelela ngenxa yendima yalo evamile ezinhlelweni ezinjalo.
Isikhathi sokuthumela: Apr-19-2023