TC4 ceev: p=4.44g/cm3.
TC4 melting kub ntau yam 1630 ~ 1650C
TC4 cov khoom sib nqus: tsis sib nqus, qhov sib nqus permeability μ=1.00005H / m nyob rau hauv cov xwm txheej ntawm 1592A / m magnetic teb lub zog.
TC4 titanium alloy yog cov hlau uas tsis tshua muaj siab, siab zog, thiab kub tsis kam, thiab siv dav hauv kev lag luam tshuaj thiab lwm yam. TC4 titanium alloy yog siv ob-theem titanium alloy tshaj plaws nyob hauv lub ntiaj teb vim nws cov khoom zoo heev.
Cov khoom tseem ceeb ntawm TC4 titanium alloy yog tuav, forgings, tuab daim hlau, nyias daim hlau, profiles, thiab cov xov hlau. Cov hlau feem ntau yog siv rau hauv lub xeev annealed thiab tuaj yeem ntxiv dag zog los ntawm kev kho kev laus, tab sis pob tshab hla ntu feem ntau tsis tshaj 25 hli.
Theem hloov pauv kub thiab hloov pauv ntxiv yog 980 ~ 1010C.
Lub sij hawm-temperature-cov ntaub so ntswg hloov nkhaus.
Alloy qauv: Cov alloy yog tsim los ntawm a thiab B theem nyob rau hauv ib tug equilibrium lub xeev ntawm chav tsev kub, thiab cov ntsiab lus ntawm cov theem yog feem ntau 8 mus rau 10 feem pua. Thaum cov hlau yog txias txias los ntawm cheeb tsam B theem, tau txais supersaturated martensitic theem a; Thaum txias txias los ntawm sab sauv ntawm thaj tsam ntxiv B theem, qhov ntxiv ib theem tau txais, nrog rau me me ntawm cov theem B uas khaws cia. Thaum lub sij hawm kev laus, ob theem a' thiab B theem decompose mus rau theem B ntxiv. Thaum maj mam txias los ntawm sab sauv ntawm ib qho ntxiv B cheeb tsam, thawj theem ib, lub flaky thib ob theem, thiab ib qho me me ntawm B theem tau txais. Kev sib xyaw ntawm theem nrab a-theem thiab khaws cia B-theem feem ntau hu ua qhov hloov pauv B-qauv.
Microstructure thiab mechanical zog ntawm laser khw tsim TC4:
1. Lub laser peb-dimensional tsim TC4 alloy yog tsim los ntawm columnar crystals uas khiav los ntawm ntau txheej txheej cladding. Nws qhia tau hais tias lub teeb thiab tsaus txheej txheej raws li qhov kev taw qhia tso tawm. Sab hauv yog cov qauv widmanstatten nrog cov pawg me me thiab martensite '.
2. Kev ntxhov siab kev ntxhov siab annealing thiab daws kev laus kev kho mob tuaj yeem ua rau tsis muaj zog lamination tshwm sim thiab ua lub luag haujlwm hauv homogenizing cov qauv; Kev ntxhov siab nyem annealing kho tuaj yeem txhim kho tag nrho lub zog thiab plasticity, tab sis cov nyhuv tsis zoo; Kev kho kev laus tuaj yeem tau txais cov qauv pob tawb, Thiab equiaxed theem tuaj yeem tau txais, uas ua rau muaj txiaj ntsig zoo ntawm cov khoom siv hluav taws xob ntawm laser khw tsim TC4 alloy.
3. Lub tensile tawg ntawm TC4 titanium alloy deposited thiab kev ntxhov siab-relieved annealed los ntawm laser peb-dimensional forming yog ib tug sib xyaw fractures, lub dimple yog ntiav thiab me me, thiab tsim mechanism ntawm lub cleavage kauj ruam yog hais tias lub tawg yog nyob rau hauv parallel Widmanstatten. lath interface los yog grain ciam nyob rau hauv lub grain Lub nruam theem interface yog sai heev nthuav thiab tsim; Lub tensile puas nyob rau hauv lub xeev laus laus yog ib tug ductile puas, thiab lub equiaxed theem thiab pob tawb qauv tau los ntawm kev daws aging kev kho mob yuav txo tau tus plam deb thiab inhibit qhov tshwm sim ntawm cleavage, ho txhim kho cov khoom siv kho tshuab.
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