I-15CrMoG isiqinisekiso sekhwalithi yepayipi lensimbi enomfutho ophezulu
Ipayipi lensimbi le-15CrMoG liwuhlobo lwepayipi lensimbi elingenamthungo, futhi ukusebenza kwalo kuphakeme kakhulu kunokwepayipi elivamile lensimbi elingenamthungo. Ngenxa yokuthi lolu hlobo lwamapayipi ensimbi luqukethe i-Cr eyengeziwe, ukumelana kwalo lokushisa okuphezulu, ukumelana nokushisa okuphansi nokumelana nokugqwala akukwazi ukuqhathaniswa namanye amapayipi ensimbi angenamthungo, ngakho-ke ipayipi lengxubevange lisetshenziswa kabanzi ku-petroleum, imboni yamakhemikhali, amandla kagesi, ibhayela nezinye izimboni. .
Umgomo wokuhlanzwa kwe-hydrogen ngepayipi lensimbi le-15CrMoG ukuthi lapho i-hydrogen ezohlanzwa yethulwa ohlangothini olulodwa lwepayipi lensimbi elingu-15CrMoG ku-300-500 ℃, i-hydrogen ikhangiswe odongeni lwepayipi lensimbi engu-15CrMoG. Ngenxa yokuntuleka kwama-electron amabili kungqimba lwe-electron ye-4D ye-palladium, ingakha izibopho zamakhemikhali ezingazinzile ne-hydrogen (ukusabela phakathi kwe-palladium ne-hydrogen kuyabuyiselwa emuva). Ngaphansi kwesenzo se-palladium, i-hydrogen i-ionized ibe ama-proton ane-radius engu-1.5 × 1015m, kuyilapho i-lattice constant ye-palladium ingu-3.88 × 10-10m (ku-20 ℃), ingadlula kupayipi lensimbi engu-15CrMoG ingxubevange. Ngaphansi kwesenzo se-palladium, ama-proton ahlangana nama-electron bese enza kabusha ama-molecule e-hydrogen, aphuma ngakolunye uhlangothi lwepayipi lensimbi elingu-15CrMoG. Ebusweni bepayipi lensimbi ye-alloy engu-15CrMoG, igesi engahlotshaniswanga ayikwazi ukudlula, ngakho-ke ipayipi yensimbi ye-alloy engu-15CrMoG ingasetshenziswa ukuthola i-hydrogen ehlanzekile.
Nakuba i-palladium inokungena okuyingqayizivele ku-hydrogen, i-palladium ehlanzekile inezinto ezingasebenzi kahle, i-oxidation elula ekushiseni okuphezulu kanye nezinga lokushisa eliphansi le-recrystallization, okulula ukuligoba futhi lifake ipayipi lensimbi elingu-15CrMoG. Ngakho-ke, i-palladium ehlanzekile ayikwazi ukusetshenziswa njenge-membrane ye-permeability. Ukwengeza inani elifanele lama-elementi e-IB kanye ne-VIII ku-palladium ukuze wenze i-palladium alloy kungathuthukisa izakhiwo zemishini ze-palladium. 11. Ipayipi lensimbi engenamthungo lomkhono we-axle yemoto (gb3088-82) iyinsimbi yekhwalithi ephezulu ye-carbon structural kanye nengxubevange yensimbi yensimbi eshisayo egingqike ipayipi yensimbi engenamthungo yokukhiqiza imoto umkhono we-asikili ewuhhafu kanye nendlu ye-asi yokushayela. Ku-palladium alloy, i-akhawunti yesiliva cishe i-20-30%, kanti okuqukethwe kwezinye izingxenye (njengegolide, njll) kungaphansi kuka-5%.
① Amadijithi amabili ekuqaleni kwebanga lensimbi amelela okuqukethwe kwekhabhoni yensimbi, evezwa njengezinkulungwane ezimbalwa zesilinganiso sokuqukethwe kwekhabhoni, okufana no-40Cr.
②Izakhi eziyinhloko ze-alloying ensimbi, ngaphandle kwezakhi ze-microalloyed ngayinye, ngokuvamile zivezwa ngamaphesenti ambalwa. Uma isilinganiso sokuqukethwe kwe-alloy singaphansi kuka-1.5%, ngokuvamile uphawu lwe-elementi kuphela olumakwa ebangeni lensimbi, kodwa okuqukethwe akumakwa. Nokho, uma kulula ukudideka ngaphansi kwezimo ezikhethekile, inombolo "1" ingabuye imakwe ngemva kophawu lwesici, njengamabanga ensimbi "12CrMoV" kanye "12Cr1MoV". Okuqukethwe kwe-chromium kokwangaphambili kungu-0.4-0.6%, futhi lokho kokugcina kungu-0.9-1.2%, kanti ezinye izingxenye ziyafana. Lapho okuqukethwe okumaphakathi kwezakhi ze-alloy kungu-≥ 1.5%, ≥ 2.5%, ≥ 3.5%... Okuqukethwe kuzokhonjiswa ngemva kophawu lwesici, olungavezwa njengo-2, 3, 4... Njll. Isibonelo, 18Cr2Ni4WA.
③I-Vanadium V, i-titanium Ti, i-aluminium Al, i-boron B, umhlaba ongavamile RE kanye nezinye izakhi ze-alloy ensimbi ziyingxenye ye-microalloyed elements. Nakuba okuqukethwe kuphansi kakhulu, kusafanele kumakwe ebangeni lensimbi. Isibonelo, ku-20mnvb steel. 0.07-0.12% we-vanadium kanye no-0.001-0.005% we-boron.
④ Insimbi yekhwalithi ephezulu izomakwa ngo-"a" ekupheleni kwebanga lensimbi ukuze ihlukanise nensimbi evamile yekhwalithi ephezulu.
⑤Ngensimbi yesakhiwo se-alloy ngenjongo ekhethekile, ibanga lensimbi landulelwa (noma isijobelelo) ukumela uphawu lwenjongo yensimbi. Isibonelo, insimbi engu-30CrMnSi yesikulufu se-riveting imelwe njenge-ml30crmnsi.
Ipayipi le-alloy nepayipi elingenamthungo linakho kokubili ubudlelwano kanye nokwehluka, futhi alikwazi ukudideka. Ipayipi le-alloy luhlobo lwepayipi elingenamthungo. Nakuba ingenakuxutshwa, ipayipi elingenamthungo lihlanganisa ipayipi lengxubevange.
Ipayipi le-alloy lichazwa njengepayipi lensimbi ngokusho kwempahla yokukhiqiza (okungukuthi impahla). Njengoba igama liphakamisa, iyipayipi eyenziwe nge-alloy; Ipayipi elingenamthungo lichazwa ngokuya ngenqubo yokukhiqiza yepayipi lensimbi (i-seamless seam). Okuhlukile kumapayipi angenamthungo ipayipi elingenamthungo, elihlanganisa ipayipi elishiselwe ngomthungo oqondile kanye nepayipi elivunguzayo.
