Lub recrystallization kub ntawm lanthanum-doped molybdenum hlau yog siab dua li ntshiab molybdenum hlau, thiab nws yog vim me me ntawm La2O3 tuaj yeem txhim kho cov khoom thiab cov qauv ntawm molybdenum hlau. Tsis tas li ntawd, La2O3 theem ob cov nyhuv kuj tuaj yeem ua rau chav tsev kub muaj zog ntawm molybdenum hlau thiab txhim kho chav tsev kub brittleness tom qab recrystallization.
Recrystallization Kub Sib Piv: Lub microstructure ntawm ntshiab molybdenum hlau tau pom tseeb dav ntawm 900 ℃ thiab recrystallized ntawm 1000 ℃. Nrog rau qhov kub thiab txias nce, recrystallization nplej kuj nce, thiab cov ntaub so ntswg txo qis. Thaum lub annealing kub nce mus txog 1200 ℃, molybdenum hlau tau tag recrystallized, thiab nws cov microstructure qhia tau hais tias ib tug kuj uniform equiaxed recrystallized nplej. Raws li qhov kub nce, cov nplej loj hlob tsis sib xws thiab zoo li coarse nplej. Thaum annealed ntawm 1500 ℃, molybdenum hlau yog yooj yim tawg, thiab nws cov qauv qhia tau hais tias ntxhib equiaxed nplej. Cov qauv fiber ntau ntawm lanthanum-doped molybdenum hlau broadened tom qab annealed ntawm 1300 ℃, thiab cov hniav zoo li zoo li nyob rau ntawm ciam teb ntawm fiber. Thaum 1400 ℃, cov nplej recrystallized tshwm. Ntawm 1500 ℃, fiber ntau kev ntxhib los mos txo qis, thiab cov qauv recrystallized tshwm pom tseeb, thiab cov nplej loj hlob tsis sib xws. Qhov kub ntawm recrystallization ntawm lanthanum-doped molybdenum hlau yog siab dua li ntawm cov ntshiab molybdenum hlau, uas yog vim cov nyhuv ntawm La2O3 thib ob theem hais. Lub La2O3 theem thib ob cuam tshuam cov nplej ciam teb thiab kev loj hlob ntawm cov nplej, yog li ua rau qhov kub thiab txias recrystallization.
Chav ntsuas kub Mechanical Properties Comparison: Lub elongation ntawm ntshiab molybdenum hlau nce nrog annealing kub nce. Thaum lub anneal kub ntawm 1200 ℃, elongation ncav cuag tus nqi siab tshaj. Lub elongation txo nrog lub anneal kub nce. Annealed ntawm 1500 ℃, thiab nws elongation yuav luag sib npaug rau xoom. Lub elongation ntawm La-doped molybdenum hlau yog zoo ib yam li ntshiab molybdenum hlau, thiab tus nqi elongation mus txog qhov siab tshaj plaws thaum annealed ntawm 1200 ℃. Thiab ces qhov elongation txo nrog kub nce. Qhov txawv tsuas yog qhov txo qis yog qeeb. Txawm hais tias lub elongation ntawm lanthanum-doped molybdenum hlau yog qeeb qeeb tom qab annealing ntawm 1200 ℃, qhov elongation yog siab dua li ntshiab molybdenum hlau.
Post lub sij hawm: Dec-19-2021