Vim li cas super alloy 253ma yog cov khoom ntawm kev xaiv rau kev siv kub?
Taw qhia ntawm super alloy 253ma
253MA yog npib tsib xee-dawb, kub-resistant austenitic stainless hlau tsim rau daim ntaub ntawv uas yuav tsum tau muaj zog creep thiab zoo corrosion kuj. Nws qhov kev ua haujlwm kub yog 850 ~ 1100 degree. Ntxiv nrog rau cov ntsiab lus alloying chromium thiab npib tsib xee, qib stainless hlau no kuj muaj me me ntawm cov hlau tsis tshua muaj hauv ntiaj teb (REM), uas txhim kho nws cov oxidation tsis kam. Nitrogen yog ntxiv los txhim kho cov khoom nkag thiab ua rau cov hlau tsis muaj austenitic. Txawm hais tias nws cov ntsiab lus tsis tshua muaj chromium thiab npib tsib xee, cov hlau tsis zoo no muaj ntau qhov sib txawv ntawm qhov kub thiab txias xws li alloyed alloy steels thiab nickel-based alloys.
Qhov zoo ntawm super alloy 253ma
Kev kub siab ua haujlwm: 253MA stainless hlau muaj qhov kub thiab txias tsis kam thiab tuaj yeem ua haujlwm tau ntev hauv qhov kub thiab txias ntawm 1100 degree txog 1150 degree. Piv nrog rau lwm cov ntaub ntawv stainless hlau, nws tseem tuaj yeem tswj cov khoom zoo thiab oxidation tsis kam ntawm qhov kub siab dua. Anti-oxidation kev ua tau zoo: 253MA stainless hlau muaj cov ntsiab lus tsis tshua muaj hauv ntiaj teb thiab cov hlau tsis tshua muaj, uas ua rau nws tsim cov oxide ntom ntom txheej. Cov txheej txheej saum npoo no zoo tiv thaiv cov hlau los ntawm kev ua pa nrog oxygen ntawm qhov kub thiab txias, muab kev tiv thaiv zoo rau oxidation thiab corrosion. Creep tsis kam thiab thermal qaug zog tsis kam: Vim nws cov alloy muaj pes tsawg leeg thiab microstructure tom qab ua haujlwm txias, 253MA stainless hlau nthuav tawm zoo creep tsis kam thiab thermal qaug zog. Nws tuaj yeem tiv taus kev ntxhov siab ntev thiab siab nyob rau hauv qhov kub thiab txias yam tsis muaj deformation lossis tawg. Cov khoom siv kho tshuab zoo: 253MA stainless hlau muaj cov khoom siv kho tshuab zoo heev, suav nrog cov txiaj ntsig siab thiab lub zog tensile. Qhov no tso cai rau nws tiv taus qhov hnyav hnyav hauv qhov kub thiab txias thaum tswj kev ua haujlwm zoo. Kev tiv thaiv corrosion zoo: 253MA stainless hlau muaj kev ua haujlwm siab rau qee qhov kev tawm tsam, xws li sulfide, chloride thiab carbide. Yog li ntawd, nws qhia tau hais tias zoo heev corrosion kuj nyob rau hauv complex tshuaj ib puag ncig.
