titanium alloy cov ntaub ntawv ua lub luag haujlwm tseem ceeb hauv kev tsim cov fasteners, vim tias lawv tau zoo sib xws rau cov txheej txheem fabrication thiab kev siv cov kev cai.
Kev tsim cov txheej txheem ntawm titanium alloy fasteners encompass peb yam tseem ceeb: yas deformation, nto li, thiab machining. Cov txheej txheem yas deformation muaj xws li cov txheej txheem xws li swaging, necking down, thiab xov dov. Kev txhim kho saum npoo yuav tsum muaj zog rau thaj chaw xws li ntsia liaj qhov rooj-cov kabmob qhov chaw thiab cov pas nrig hloov chaw. Cov txheej txheem machining xws li tig, milling, thiab sib tsoo kuj ua haujlwm.
Kev xaiv ntawm titanium alloy cov ntaub ntawv rau fasteners nyob ntawm lawv cov kev siv tshwj xeeb thiab cov kev ua tau zoo sib xws. Piv txwv li, rivets xav tau cov yas siab vim yog qhov xav tau ntawm kev tsim ib lossis ob qho tib si thaum lub sijhawm teeb tsa. Ntawm qhov tod tes, bolts feem ntau xav tau lub zog siab, piv rau cov hlau uas muaj zog siab (piv txwv li, 30CrMnSiA), yog li feem ntau siv cov titanium alloys siab.
Titanium alloy cov ntaub ntawv rau fasteners tuaj yeem muab faib ua peb hom: kev lag luam ntshiab titanium, (+)-hom alloys, thiab -type alloys. Kev lag luam ntshiab titanium feem ntau suav nrog TA1 thiab TA2. (+ )-hom alloys suav nrog TC4, TC6, Ti-662, thiab lwm yam. -type alloys feem ntau muaj metastable -type titanium alloys, qhov twg molybdenum sib npaug feem ntau yog nyob ib ncig ntawm 10%. Nyob ze-beta alloys nrog molybdenum sib npaug hauv qab 10% nthuav tawm tsis muaj zog ntxiv thaum lub sijhawm kho cua sov, thaum ruaj khov-type alloys nrog molybdenum sib npaug saum 10% qhia siab-theem stability, ua rau lawv nyuaj rau decompose. Yog li ntawd, metastable-type titanium alloys nthuav tawm cov txiaj ntsig zoo tshaj plaws. Tsis tas li ntawd, metastable-type titanium alloys muaj qhov zoo tshaj plaws txias formability, tso cai rau lub taub hau txias yam tsis tas yuav tsum muaj cov cuab yeej tshwj xeeb cua sov thiab cov xov xwm tiv thaiv roj. Qhov no ua rau muaj kev ua tau zoo ntau lawm, kev siv cov khoom siv, qhov ntev precision, thiab qhov zoo ntawm qhov chaw rau tsim fasteners. Hauv qhov sib piv, (+)-hom titanium alloy fasteners tuaj yeem tsim los ntawm cov txheej txheem kub kub, xav tau cov cuab yeej siv cua sov thiab cov khoom siv roj, ua rau txo qis kev ua haujlwm, kev siv cov khoom siv, thiab cov teeb meem kub tsis sib xws.
Rau rivets ua los ntawm ntshiab titanium, lub zog tensile feem ntau tshaj 350 MPa, thaum lub zog shear yog li ntawm 240 txog 350 MPa. Rivets ua los ntawm (+ )-hom alloys yog siv nyob rau hauv lub xeev annealed, thaum cov uas ua los ntawm -hom alloys yog ua hauj lwm nyob rau hauv cov kev daws teeb meem. Ob hom alloy muaj qhov zoo sib xws tensile zog ntawm 800-950 MPa thiab shear zog tshaj 600 MPa.
Titanium alloy cov ntaub ntawv rau bolts, tshwj tsis yog rau TC4, feem ntau muaj xws li metastable-type alloys, siv nyob rau hauv kev kho-kho thiab hnub nyoog tej yam kev mob. Nrog rau kev zam ntawm TB8, TB9, thiab Ti-555 alloys, uas tuaj yeem ua tiav tensile lub zog siab dua 1,200 MPa, feem ntau-type titanium alloys pom muaj zog tensile nyob ib ncig ntawm 1,100 MPa thiab shear zog li ntawm 650 txog 700 MPa.
