A335P91 alloy tube qhia
A335P91 alloy yeeb nkab yog kub-resistant steel nrog pearlite qauv. Nws muaj lub zog thermal siab (δb Ntau dua lossis sib npaug ntawm 440MPa) thiab oxidation tsis kam ntawm qhov kub thiab txias, thiab muaj qee yam hydrogen corrosion kuj. Txij li cov hlau muaj cov ntsiab lus siab ntawm Cr, C thiab lwm yam hlau alloying, cov hlau muaj qhov pom tseeb hardening nyiam thiab tsis zoo weldability. Cov nram qab no g qhia txog boiler steel.
Lub hauv paus ntsiab lus ntawm hydrogen purification los ntawm A335P91 alloy raj
Lub hauv paus ntsiab lus ntawm hydrogen purification los ntawm A335P91 alloy raj yog hais tias thaum lub hydrogen yuav tsum tau purified yog dhau mus rau ib sab ntawm lub A335P91 alloy raj ntawm 300-500 degree, hydrogen yog adsorbed rau ntawm phab ntsa ntawm 15crmog alloy raj. Txij li thaum 4d electron txheej ntawm palladium tsis muaj ob Electrons tuaj yeem tsim cov tshuaj tsis ruaj khov nrog hydrogen (cov tshuaj tiv thaiv ntawm palladium thiab hydrogen yog thim rov qab). Nyob rau hauv qhov kev txiav txim ntawm palladium, hydrogen yog ionized rau hauv protons nrog lub vojvoog ntawm 1.5 × 1015m, thiab cov lattice tas li ntawm palladium yog 3.88 × 10-10m (ntawm 20 degree), yog li nws tuaj yeem dhau los ntawm A335P91 alloy raj. Nyob rau hauv qhov kev txiav txim ntawm palladium, cov protons ua ke nrog cov electrons thiab rov tsim hydrogen molecules, thiab khiav tawm ntawm sab nraud ntawm 15crmog alloy raj. Nyob rau saum npoo ntawm 15crmog alloy tube, cov roj tsis sib xws yog impermeable, yog li A335P91 alloy tube tuaj yeem siv tau kom tau txais high-purity hydrogen. Txawm hais tias palladium muaj qhov tshwj xeeb hydrogen permeability, ntshiab palladium muaj cov khoom siv tsis zoo, yooj yim oxidized ntawm qhov kub thiab txias, thiab tsis tshua muaj recrystallization kub, uas tuaj yeem yooj yim deform thiab embrittle A335P91 alloy raj, yog li ntshiab palladium tsis tuaj yeem siv los ua ib daim nyias nyias.
A335P91 alloy tube kub kuj
A335P91 alloy yeeb nkab 15CrMoG steel yog hom hlau dav siv hauv kev lag luam fais fab. Nws muaj kev ua haujlwm siab thermal thaum siv ntawm 500 degree -550 degree . Thaum ua haujlwm kub siab tshaj 550 degree, nws cov thermal zog ua haujlwm tau txo qis. Cov hlau no tsuas yog siv rau cov kav dej siab thiab nruab nrab thiab cov kav dej qhia cov kav dej nrog qhov ntsuas ntawm 510 degree, thiab cov kav dej rhaub nrog cov yeeb nkab phab ntsa kub hauv qab 550 degree.
Cov khoom siv dab tsi yog A335P91 alloy yeeb nkab 15CrMoG ua los ntawm?
Lub microstructure ntawm 15CrMoG thiab 15CrMo steel nyob rau hauv A335P91 alloy yeeb nkab nyob rau hauv ib txwm mov lub xeev yog ferrite ntxiv pearlite. Thaum lub sijhawm ua haujlwm ntev ntawm A335P91 alloy yeeb nkab hauv kev ua haujlwm kub ntawm 500 degree -550 degree, pearlite spheroidization thiab alloying yuav tshwm sim. Vim yog qhov rov ua dua ntawm cov ntsiab lus ntawm cov tshuaj tov thiab carbide thiab kev hloov pauv ntawm carbide theem qauv, lub thermal zog thiab txhua yam khoom ntawm A335P91 alloy yeeb nkab maj mam txo qis raws li cov degree ntawm pearlite spheroidization thiab cov degree ntawm depletion ntawm alloying ntsiab nyob rau hauv cov khoom tov nce. Yog li ntawd, cov khoom siv maj mam deteriorates los yog txawm tsis.
Qhov kev ua tau zoo ntawm A335P91 alloy yeeb nkab yog dab tsi?
Kev ua tau zoo ntawm cov kav hlau alloy yog siab dua li cov kav hlau tsis sib xws, vim tias cov yeeb nkab steel no muaj ntau dua Cr, thiab nws qhov kub tsis kam, tsis kub tsis kam, thiab corrosion kuj yog unmatched los ntawm lwm yam seamless steel kav, yog li cov kav hlau alloy yog dav. siv hauv roj av, aerospace, tshuaj lom neeg kev lag luam, hluav taws xob fais fab, boiler, tub rog kev lag luam thiab lwm yam lag luam yog dav siv. Cov khoom siv ntawm cov kav hlau yog: 15CrMoG, 12CrMoG, P91, WB36.
