Qhov kub ntawm recrystallization ntawm lanthanum-doped molybdenum hlau siab dua li cov hlau molybdenum ntshiab, thiab nws yog vim tias me me ntawm La2O3 tuaj yeem txhim kho cov khoom thiab cov qauv ntawm molybdenum hlau. Dhau li ntawm qhov ntawd, La2O3 theem ob qhov cuam tshuam kuj tseem tuaj yeem ua rau lub zog kub ntawm chav tsev ntawm molybdenum hlau thiab txhim kho qhov kub ntawm chav tsev brittleness tom qab recrystallization.
Kev Sib Piv Kub ntawm Recrystallization: Lub microstructure ntawm cov hlau molybdenum ntshiab tau pom tseeb tias dav dua ntawm 900 ℃ thiab recrystallized ntawm 1000 ℃. Nrog rau qhov kub annealing nce, cov noob recrystallization kuj nce ntxiv, thiab cov ntaub so ntswg fibrous txo qis. Thaum qhov kub annealing nce mus txog 1200 ℃, hlau molybdenum tau recrystallized tag nrho, thiab nws cov microstructure qhia tau tias cov noob recrystallized sib npaug sib npaug. Thaum qhov kub nce ntxiv, cov noob loj hlob tsis sib xws thiab zoo li cov noob ntxhib. Thaum annealed ntawm 1500 ℃, cov hlau molybdenum yooj yim tawg, thiab nws cov qauv qhia tau tias cov noob ntxhib equiaxed. Cov qauv fiber ntawm lanthanum-doped molybdenum hlau dav dua tom qab annealed ntawm 1300 ℃, thiab cov duab zoo li hniav tshwm sim ntawm ciam teb ntawm cov fiber. Ntawm 1400 ℃, cov noob recrystallized tshwm sim. Thaum 1500 ℃, cov qauv fiber txo qis, thiab cov qauv recrystallized tshwm sim pom tseeb, thiab cov noob loj hlob tsis sib npaug. Qhov kub ntawm recrystallization ntawm lanthanum-doped molybdenum hlau siab dua li ntawm cov hlau molybdenum ntshiab, uas yog vim muaj qhov cuam tshuam ntawm La2O3 theem ob. La2O3 theem ob cuam tshuam kev tsiv teb tsaws chaw ntawm cov noob thiab kev loj hlob ntawm cov noob, yog li ua rau qhov kub ntawm recrystallization nce ntxiv.
Kev Sib Piv Txog Cov Khoom Siv Kho Tshuab Kub Hauv Chav: Qhov ntev ntawm cov hlau molybdenum ntshiab nce nrog rau qhov kub thiab txias annealing nce. Thaum qhov kub thiab txias anneal ntawm 1200 ℃, qhov ntev mus txog qhov siab tshaj plaws. Qhov ntev txo qis nrog rau qhov kub thiab txias anneal nce. Annealed ntawm 1500 ℃, thiab nws qhov ntev yuav luag sib npaug rau xoom. Qhov ntev ntawm La-doped molybdenum hlau zoo ib yam li cov hlau molybdenum ntshiab, thiab qhov ntev ntev mus txog qhov siab tshaj plaws thaum annealed ntawm 1200 ℃. Thiab tom qab ntawd qhov ntev txo qis nrog rau qhov kub thiab txias nce. Qhov txawv tsuas yog qhov txo qis qeeb. Txawm hais tias qhov ntev ntawm lanthanum-doped molybdenum hlau qeeb qeeb tom qab annealing ntawm 1200 ℃, qhov ntev siab dua li cov hlau molybdenum ntshiab.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-19-2021