TC4 titanium alloy yog ib tug neeg sawv cev ntawm titanium alloys, uas yog dav siv nyob rau hauv aerospace, kho mob thiab tshuaj kev lag luam vim nws zoo heev zog, corrosion kuj thiab kub ua hauj lwm. Nws cov khoom tseem ceeb suav nrog Titanium (Ti, 90%), Aluminium (Al, 6%) thiab Vanadium (V, 4%). Qhov kev sib piv alloying no muab TC4 kev ua tau zoo tshaj plaws, ua rau nws yog cov khoom siv zoo tshaj plaws rau kev tsim khoom siab -. Hauv daim ntawv no, peb yuav tsom mus rau kev tshuaj xyuas cov khoom tensile thiab melting point yam ntxwv ntawm TC4 titanium alloy, thiab sib tham txog nws cov peev xwm thov nyob rau hauv ib puag ncig kub.
I. Tensile zog ntawmTC4 (GR5) titanium alloy
Tensile zog yog cov cim tseem ceeb ntawm cov khoom siv zog, tshwj xeeb tshaj yog rau cov titanium alloys, nws cov ductility thiab durability nyob rau hauv siab load ib puag ncig yog ib qho tseem ceeb.Lub tensile zog ntawm TC4 titanium alloy mas muaj xws li tensile zog, yield zog, elongation thiab sectional shrinkage.
1. Lub zog tensile
Lub zog tensile ntawm TC4 titanium alloy tuaj yeem ncav cuag 900-1000 MPa, uas yog siab dua li cov hlau zoo tib yam, thiab muaj qhov zoo tshaj plaws hauv kev lag luam aerospace uas yuav tsum muaj lub zog siab. Nws cov khoom tensile cuam tshuam zoo heev los ntawm txoj kev kho cua sov, piv txwv li:
Nyob rau hauv qhov xwm txheej forged thiab kub dov, lub zog tensile ntawm TC4 feem ntau ncav cuag 950 MPa.
Nrog rau kev kho cua sov kom tsim nyog, nws lub zog tuaj yeem nce ntxiv, ua rau nws ua tau zoo nyob rau hauv siab -kev ua tau zoo ntawm cov qauv.
2. Yield zog
Lub zog tawm ntawm TC4 titanium alloys feem ntau yog nyob rau hauv thaj tsam ntawm 800-860 MPa, uas txiav txim siab qhov tseem ceeb ntawm cov yas deformation ntawm cov khoom tshwm sim. Lub peev xwm ntawm TC4 los tswj nws cov duab thiab qhov ntev ntawm kev ruaj ntseg nyob rau hauv ib puag ncig kev ntxhov siab tau ua rau ntau yam kev siv xws li cov dav hlau fuselages thiab cov cav tov. Nws cov khoom muaj txiaj ntsig tuaj yeem ua kom zoo ntxiv los ntawm kev kho cua sov xws li quenching, kev laus kev kho mob thiab annealing.
3. Elongation thiab seem shrinkage
Elongation (qhov siab tshaj plaws elongation ntawm cov khoom ua ntej tawg): 10% -15%, qhia tias TC4 tseem muaj cov yas zoo ntawm lub zog siab.
Nqe lus shrinkage (txo nyob rau hauv cross-sectional cheeb tsam tom qab tawg): 25%-40%, qhia tias cov khoom muaj zoo heev toughness.
Qhov no ua rau TC4 alloy haum rau kev tsim khoom ntawm cov txheej txheem nyuaj, hauv cov txheej txheem ntawm kev ua haujlwm tuaj yeem txo qhov kev pheej hmoo ntawm pob txha, txhim kho cov khoom lag luam.
Thib ob, lub melting point tsom xam ntawmTC4 (GR5) titanium alloy
Lub melting point yog ib qho tseem ceeb parameter cuam tshuam rau qhov kub thiab txias kev ua tau zoo ntawm cov khoom, uas ncaj qha txiav txim nws lub peev xwm los siv nyob rau hauv huab huab cua. Lub melting point ntawm TC4 titanium alloy yog hais txog 1660 degree, uas muab nws zoo heev kub stability thiab ua rau nws ib tug zoo tagnrho cov ntaub ntawv rau kub qhov chaw xws li aero- cav thiab turbine hniav. 1. cuam tshuam ntawm muaj pes tsawg leeg ntawm melting point.
1. Cov nyhuv ntawm muaj pes tsawg leeg ntawm melting point
Lub melting point ntawm TC4 alloy feem ntau cuam tshuam los ntawm cov titanium, aluminium thiab vanadium:
Melting point ntawm ntshiab titanium: 1668 degree
Aluminium melting point: 660℃(muab lub teeb yuag)
Vanadium melting point: 1910℃(txhim kho qhov kub thiab txias).
Txawm hais tias lub melting point ntawm TC4 yog me ntsis qis dua cov ntshiab titanium, qhov sib ntxiv ntawm txhuas thiab vanadium txhim khu nws lub siab - qhov kub thiab txias tsis kam, ua rau nws muaj kev ruaj khov qauv ntawm qhov kub thiab txias.
2. Cov nyhuv ntawm melting point ntawm kev ua haujlwm kub
Nyob rau hauv 500℃kub, TC4 tensile lub zog tseem tuaj yeem khaws cia ntawm 600-650 MPa, deb tshaj li cov hlau zoo tib yam. Qhov no ua rau nws nyob rau hauv lub aviation cav, turbine hniav thiab lwm yam tseem ceeb Cheebtsam ntawm lub sij hawm ntev ntawm kev ua tau zoo, yuav tsis yog vim kub softening los yog tsis ua hauj lwm.
3. Kev cuam tshuam ntawm cov txheej txheem melting thiab casting
Vim tias titanium thiab nws cov alloys hnov mob yooj yim nrog oxygen, nitrogen thiab hydrogen, melting ntawm TC4 alloy feem ntau siv lub tshuab nqus tsev melting los txo cov impurity cov ntsiab lus thiab xyuas kom cov uniformity thiab stability ntawm cov hlau. Kev ua kom zoo ntawm cov txheej txheem melting tuaj yeem txhim kho qhov kub siab tensile zog thiab kav ntev ntawm TC4.
Thib peb, qhov kub siab thov ntawm TC4 titanium alloy
Ua tsaug rau nws lub zog siab, siab melting point thiab zoo heev corrosion kuj, TC4 titanium alloy yog dav siv nyob rau hauv cov nram qab no teb:
Aerospace: siv nyob rau hauv dav hlau cav, fuselage qauv, turbine hniav, ntev -lub sij hawm kub thiab kub siab ib puag ncig.
Cov khoom siv kho mob: xws li cov pob qij txha, pob txha daim hlau, kev cog hniav, nws zoo heev biocompatibility thiab corrosion kuj kom muaj kev nyab xeeb.
Cov khoom siv tshuaj: haum rau qhov kub thiab txias, muaj zog corrosion ib puag ncig, xws li kua qaub thiab alkali resistant kav, tshav kub exchangers, thiab lwm yam.
Xaus
Nrog nws lub zog tensile siab, zoo plasticity thiab siab melting point,TC4 (GR5) titanium alloyqhia tau hais tias ua tau zoo heev hauv aerospace, kev kho mob thiab tshuaj industries. Nws siab - kub stability thiab corrosion kuj ua kom ntev - lub sij hawm txhim khu kev qha lag luam nyob rau hauv huab ib puag ncig. Los ntawm kev ua kom zoo rau kev kho cua sov thiab cov txheej txheem melting, qhov kev ua tau zoo ntawm TC4 tuaj yeem txhim kho ntxiv, uas yuav ua rau nws muaj kev cia siab rau daim ntawv thov dav dav rau yav tom ntej siab -kawg kev lag luam.
