Yuav ua li cas nyuaj titanium alloy?
Nyob rau hauv aerospace cav hniav, nyob rau hauv lub siab hulls ntawm sib sib zog nqus - hiav txwv probes, thiab nyob rau hauv lub intricate qauv ntawm dag pob qij txha, titanium alloys, nrog rau lawv cov tshwj xeeb hardness yam ntxwv, txhawb lub siab xav tau ntawm niaj hnub kev lag luam. Cov khoom no, hailed li "qhov chaw hlau," tsis muaj ib tug lej tus nqi rau hardness, tab sis ib tug complex tapestry woven los ntawm alloy muaj pes tsawg leeg, microstructure, thiab cov txheej txheem kho cua sov. Los ntawm cov softness ntawm industrial ntshiab titanium mus rau lub toughness ntawm TC4 titanium alloy, ntau yam ntawm titanium alloy hardness qhia lub nruam breakthroughs nyob rau hauv cov ntaub ntawv kev tshawb fawb ntawm kev ua tau zoo txwv.
Lub hardness ntawm titanium alloys stems los ntawm lawv cov qauv siv lead ua thiab alloying tsim. Ntshiab titanium nthuav tawm qhov ze -packed hexagonal (HCP) qauv nyob rau hauv chav tsev kub, uas ua rau ib tug kuj tsawg pib hardness; Vickers hardness ntawm industrial ntshiab titanium feem ntau nyob rau hauv thaj tsam ntawm 70-120 HV. Thaum alloying ntsiab xws li txhuas thiab vanadium ntxiv, cov theem muaj pes tsawg leeg ntawm titanium alloys dhau ib qho kev hloov pauv: lub -stabilizing element aluminium txhawb kev ruaj ntseg ntawm HCP qauv, thaum lub -stabilizing element vanadium expands qhov kub thiab txias ntau ntawm lub cev -centered cubic (BCC) qauv. Noj TC4 (Ti-6Al-4V) ua piv txwv, nws cov tawv tawv tuaj yeem ncav cuag 32-38 HRC, thiab tom qab kev laus kho, nws tuaj yeem nce ntxiv mus rau 36-44 HRC. Qhov kev nyuaj siab no yog los ntawm cov qauv "feather-like" tsim los ntawm kev hloov pauv ntawm kev nplua thiab theem, uas cuam tshuam zoo rau kev txav mus los.
Kev kho cua sov yog tus yuam sij rau kev tswj lub hardness ntawm titanium alloys. Kev kho cov tshuaj dissolves cov theem ntawm qhov kub thiab txias, ua raws li qhov txias txias kom tau txais cov tshuaj supersaturated, nteg lub hauv paus rau lub hnub nyoog tom ntej hardening. Tom qab kev daws teeb meem ntawm 950 degree, TC4 titanium alloy undergoes aging ntawm 550℃rau 4 teev, nce nws hardness ntawm 32 HRC nyob rau hauv lub xeev annealed rau 42 HRC. Qhov kev nce no yog vim cov nag lossis daus tsis sib xws ntawm nanoscale theem hauv matrix. Rau - hom titanium alloys xws li TB6, kev kho cryogenic (-196 degree) tuaj yeem ua rau kev hloov pauv ntawm martensitic, ua kom lub zog ntawm 38 HRC mus rau 45 HRC thaum tuav lub elongation ntawm ntau dua 12%. Qhov sib npaug ntawm hardness thiab toughness no ua rau nws yog ib qho kev xaiv zoo tshaj plaws rau siab -load-cov kabmob xws li tsaws iav. Cov thev naus laus zis kho deg tau qhib qhov ntev tshiab rau qhov hardness ntawm titanium alloys. Ion implantation tuaj yeem tsim 0.5μm tuab titanium nitride txheej ntawm TC4 nto, ua kom cov tawv tawv ntawm 400HV txog 1200HV thiab txhim kho hnav tsis kam los ntawm ntau tshaj peb zaug. Laser cladding thev naus laus zis, los ntawm kev sib xyaw TiC- cov txheej txheej ntxiv rau saum npoo ntawm TA15 titanium alloy, ua tiav lub zog hauv zos ntawm 60HRC, ua tau raws li qhov hnyav hnyav ntawm cov cuab yeej drilling. Nyob rau hauv biomedical teb, titanium nitride-coated dag pob qij txha taub hau tsis tsuas yog ua tau ib tug hardness ntau tshaj 2000HV tab sis kuj txo tus nqi coj mus rau 1/10 uas ntawm cobalt-chromium alloys, ho txuas ntxiv lub neej ntawm cog.
Cov ntawv thov sib txawv tso qhov kev xav tau sib txawv ntawm qhov hardness ntawm titanium alloys. Kev lag luam aerospace xav tau cov ntaub ntawv los tuav lub hardness saum HRC40 thaum muaj siab - kub siab tshaj 600℃. TC18 titanium alloy ua tiav lub hom phiaj no los ntawm ob txheej txheej txheem annealing, tuav ruaj khov hardness ntawm 42HRC thiab creep zog ntawm 350MPa ntawm 650 degree. Marine engineering xav tau cov ntaub ntawv los tswj cov hardness stability nyob rau hauv seawater ib puag ncig. TA17 titanium alloy, nrog rau qhov sib ntxiv ntawm 0.1% palladium, pom tsuas yog 5% txo qis hauv hardness tom qab immersion nyob rau hauv 3.5% NaCl tov rau 1000 teev, deb superior rau 20% txo tau pom nyob rau hauv zoo tib yam titanium alloys. Hauv cov neeg siv khoom siv hluav taws xob, - hom titanium alloys, los ntawm qhov txias dov deformation, ua tiav ultra-siab hardness tshaj 800 HV thaum tuav 20% elastic strain peev, ua tau raws li qhov yuav tsum tau nruj ntawm foldable npo xov tooj hinges.
Los ntawm hiav txwv tob mus rau qhov tob tob, los ntawm tib neeg lub cev mus rau cov tshuab, cov yam ntxwv hardness ntawm titanium alloys txuas ntxiv nthuav dav daim ntawv thov ciam teb ntawm cov ntaub ntawv. Thaum lub cav hniav ua los ntawm TC4 titanium alloy tuav hardness stability ntawm 1500 degree, thaum implants coated nrog titanium nitride pom ntev -lub sij hawm hnav tsis kam nyob rau hauv tib neeg lub cev ib puag ncig, thiab thaum 3D- luam titanium alloy structural Cheebtsam ua tiav kev sib txuam ntawm complex geometries tsuas yog validity thiab nyuaj. hais txog qhov tuaj txog ntawm qhov siab -kev ua tau zoo era sib sib zog nqus nrog titanium alloys. Nrog rau kev koom ua ke ntawm cov thev naus laus zis tshiab xws li kev tsim khoom ntxiv thiab kev kho cua sov ntse, kev tswj xyuas qhov nyuaj ntawm titanium alloys yuav nkag mus rau lub sijhawm ntawm molecular- qib precision, muab cov khoom siv ntau dua rau tib neeg los tshawb txog qhov tsis paub.
