309S vs 310S Austenitic Stainless Steels: Siab -Temp Oxidation vs Extreme Heat Resistance

 

Dab tsi yog lawv cov ntsiab lus tseem ceeb thiab qhov sib txawv ntawm kev ua haujlwm tseem ceeb?

309S muaj 22-24% Cr, 12-15% Ni, Tsawg dua los yog sib npaug rau 0.08% C. Nws siab Cr/Ni piv resists oxidation mus txog 980 degree, zoo tagnrho rau cov khoom siv hluav taws xob thiab cov kav hluav taws xob hauv kev lag luam.310S nta 24-26% Ni. C. Siab dua Cr/Ni cov ntsiab lus boosts oxidation tsis kam mus rau 1150 degree, ua rau nws haum rau kiln Cheebtsam thiab incinerator qhov chaw.Ob qib tsis yog{17}}sib nqus nyob rau hauv lub annealed lub xeev thiab muaj zoo heev tsis kam mus carburization nyob rau hauv siab - tshav kub, tsis tshua muaj - pa oxygen ib puag ncig.

Lawv lub peev xwm siab - kub npaum li cas thiaj haum rau cov ntawv thov sib txawv?

309S ua tau zoo nyob rau hauv nruab nrab siab- qhov kub thiab txias: thermal processing furnace trays, exhaust manifolds for high-temperature engines, and boiler fireboxes (resist scaling up to 980 degree) .310S dominates high heat applications: cement kiln liners, incinerator chambers, thiab petrochemical reforming tubes 1000-1150 degree).

Nyob rau hauv cov xwm txheej twg yog ib qib irreplaceable dua lwm tus?

Xaiv 309S rau tus nqi-sensitive siab- cov ntawv siv cua sov (tsawg dua lossis sib npaug li 980 degree)- nws muaj oxidation tsis kam txaus ntawm tus nqi qis dua 310S.Opt rau 310S rau kev pabcuam siab tshaj 980℃-309S yuav raug kev txom nyem los ntawm kev nrawm nrawm thiab cov khoom degradation hauv cov cheeb tsam no.

Tus nqi thiab kev tsim khoom lag luam yog dab tsi- tawm ntawm ob qib?

310S raug nqi 30–40% ntau dua 309S vim nws cov ntsiab lus npib tsib xee ntau dua, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev pabcuam cua sov nkaus xwb.309S muaj kev tsim tau zoo dua thiab weldability zoo dua li 310S, nrog rau kev ua haujlwm qis dua -cov nqi hardening thaum lub caij txias txias (piv txwv li, dov rau hauv cov ntawv hlau rau cov khoom siv hluav taws xob).{ AW 1. Cov hlau sib xyaw ua ke (309 rau 309S, 310 rau 310S) txhawm rau khaws cia siab -kev ua haujlwm kub.

Cov kev txwv tseem ceeb thiab cov txheej txheem xaiv yog dab tsi?

Ob qib tsis haum rau marine lossis siab - ib puag ncig chloride- lawv cov ntsiab lus Cr/Ni siab tsis txhim kho cov tshuaj chloride corrosion (siv 316L hloov). 310S dhau lawm-tshwj xeeb rau qis dua-kub siv.Prioritize 309S rau nruab nrab siab-kub, nqi-sensitive siv; xaiv 310S rau huab cua kub (Ntau dua lossis sib npaug rau 1000 degree) kev pabcuam.