GNEE Aluminium 7075-T651 vs 7075-T6
Nyob rau hauv ntau yam ntawm aluminium alloys,GNEE 7075 txhuas phajsawv tawm rau nws cov kev ua tau zoo tag nrho. Nws yog dav siv nyob rau hauv kev lag luam nrog nruj cov khoom yuav tsum tau ua, nrog rau aerospace, automotive manufacturing, thiab precision machining. Ntawm nws ntau tempers,T6thiabT651yog ob yam uas feem ntau siv.
Cov txheej txheem kho cua sov
GNEE 7075-T6 txheej txheem
Kev kho cua sov ntawm GNEE 7075-T6 txhuas feem ntau muaj ob theem tseem ceeb:tshuaj kho cua sovthiabkev laus dag.
Kev kho cua sov
Lub 7075 alloy yog rhuab mus rau qhov ntsuas kub, feem ntau480-490 degree, thiab tuav rau lub sijhawm teev tseg. Qhov no tso cai rau cov ntsiab lus alloying xws li zinc, magnesium, thiab tooj liab kom tag nrho yaj mus rau hauv aluminium matrix, tsim ib qho kev daws teeb meem. Tom qab kev daws teeb meem, cov khoom pov thawj zoo plasticity, uas pab txhawb kev ua haujlwm ntxiv.
Artificial Aging
Tom qab kev daws teeb meem, cov alloy yog sai sai quenched nyob rau hauv dej thiab ces hnub nyoog ntawm ib tug qis kub, feem ntau120-130 degree, rau lub sij hawm ncua. Thaum lub sij hawm laus, nplua thiab sib npaug faib ua kom muaj zog precipitates- feem ntau covMgZn₂ theem-formhauv matrix. Cov precipitates txwv tsis pub txav mus los, ua kom muaj zog thiab hardness.
Ib tug raug T6 aging voj voog yog24 teev ntawm 120 degree, tom qab ntawd lub zog tensile ntawm GNEE 7075 txhuas tuaj yeem ncav cuagNtau dua lossis sib npaug li 530 MPa, nrog yield zogNtau dua lossis sib npaug li 470 MPa.
GNEE 7075-T651 txheej txheem
CovGNEE 7075-T651temper yog tsim los ntawm kev qhia ntxivua ntej -stretching kauj ruamraws li tus txheej txheem T6 txheej txheem.
Kev kho cua sov thiab Artificial Aging
Cov kauj ruam no zoo ib yam rau cov uas siv rau T6. Cov hlau yog cov tshuaj kho kom yaj cov ntsiab lus alloying, ua raws li cov khoom siv dag zog los ua kom muaj zog ntxiv thiab ua tiav lub zog siab.
Ua ntej-Txoj kev kho mob
Tom qab kev laus, cov khoom siv tau tswj xyuas txhua yam stretching, uas ua rau lub elongation mus tas li ntawm kwv yees li1.5%–3%. Cov txheej txheem no muaj txiaj ntsig zoo txo cov kev ntxhov siab sab hauv uas tsim tawm thaum lub sij hawm kev kho mob thiab kev laus, ua rau muaj kev ntxhov siab ntau dua.
Tsis tas li ntawd, ua ntej -stretching txhawb nqa ntau homogeneous microstructure, uas ua rau muaj kev ruaj ntseg zoo thaum lub sij hawm machining thiab kev pabcuam.
Residual Stress Reduction
Raws li qhov tshwm sim ntawm kev ua ntej -stretching, qhov kev ntxhov siab sab hauv ntawm GNEE 7075-T651 txhuas feem ntau tuaj yeem raug txo mus rauqis dua 50 MPa, whereas 7075-T6 cov khoom uas tsis muaj stretching yuav khaws residual stresses siab li200-300 MPa.
Qhov txawv ntawm GNEE 7075-T651 thiab 7075-T6
Kev kho cua sov sib txawv
T6: Kev kho cua sov + kev laus kev laus
T651: Kev kho cua sov + kev laus kev laus + ua ntej- ncab
Qhov ntxiv ua ntej -stretching kauj ruam yog qhov tseem ceeb sib txawv thiab ncaj qha cuam tshuam cov khoom siv tom ntej.
Mechanical thiab kev ua tau zoo sib txawv
Lub zog: T6 feem ntau muab lub zog siab dua me ntsis dua li T651.
Kev Nyuaj Siab Distribution: T651 tau txais txiaj ntsig los ntawm kev txhim kho kev ntxhov siab sib xws, uas txhim kho qhov tiag - ntiaj teb kev ua tau zoo hauv kev thauj khoom.
Toughness: T6 feem ntau nthuav tawm marginally zoo toughness dua T651.
Corrosion Resistance: T651 qhia tau hais tias muaj kev tiv thaiv zoo tshaj rau kev ntxhov siab corrosion tawg vim txo qis kev ntxhov siab.
Machineability: Qhov qis-txoj kev ntxhov siab ntawm T651 ua rau muaj qhov deformation tsawg dua thaum lub tshuab ua haujlwm thiab siab dua qhov tseeb piv rau T6.
