Titanium alloy, raws li lub teeb yuag cov ntaub ntawv, muaj kev ua tau zoo heev, tsis tshua muaj ntom, siab tshwj xeeb lub zog, zoo qaug zog thiab tsis kam mus tawg txuas ntxiv, zoo heev corrosion kuj, zoo vuam kev ua tau zoo, thiab lwm yam., yog li nws muaj ib tug zuj zus daim ntawv thov kev cia siab nyob rau hauv aviation, aerospace, automotive, shipbuilding, zog thiab lwm yam industries.Gr.38 titanium alloy yog ib tug tshiab titanium alloy tsim los ntawm ATI Technologies nyob rau hauv lub teb chaws USA, uas yuav siv tau los hloov cov feem ntau nruab nrab ntawm nominal muaj pes tsawg leeg ntawm Gr.38 titanium. alloy yog Ti-4Al-2.5V-1.5Fe-0.25O, uas yog ib hom ntawm + - hom high-strength titanium alloy. Piv nrog rau TC4 alloy, Gr.38 alloy siv hlau es tsis txhob ntawm cov nqi ntau dua vanadium raws li cov khoom -stabilizing. Nws lub zog yog piv rau TC4 alloy thiab nws elongation yog piv rau lossis siab dua me ntsis ntawm TC4 alloy, tab sis nws txawv ntawm qhov nws muaj peev xwm kub thiab txias ua haujlwm, thiab tuaj yeem ua rau nyias nyias. , coils, strips, precision kub-draw strips, tuab nplooj ntawv, seamless raj, raws li zoo raws li castings thiab engineered khoom. Muab hais tias Gr.38 titanium alloy muaj zoo heev superplastic txoj kev thiab qhib-qhov qaug zog zog, thiab kuj yuav muaj kev sib txhuam do vuam, nws siv yog heev dav, heev haum rau hloov steel, aluminium, composites, ntshiab titanium thiab lwm yam titanium alloys, tshwj xeeb tshaj yog nyob rau hauv aerospace thiab tub rog tiv thaiv systems muaj ib tug dav daim ntawv thov prospects. Tam sim no, muaj cov ntaub ntawv tshawb fawb tsawg heev ntawm cov hlau no, yog li ntawd, cov kws tshawb fawb tau kawm txog cov txiaj ntsig ntawm kev sib txawv annealing regimes ntawm microstructure, mechanical zog thiab tensile fracture morphology ntawm Gr.38 titanium alloy me me tuav.
Cov ntaub ntawv tseem ceeb siv rau hauv kev npaj ntawm Gr.38 titanium alloy yog titanium sponge thiab ntxiv alloying ntsiab, thiab ntxiv alloying ntsiab yog aluminium-vanadium alloy, txhuas taum, hlau rau tes thiab titanium dioxide. Tom qab cov txheej txheem ntawm kev sib xyaw thiab kev npaj electrode, thaum kawg, lub ingot ntawm Φ440mm tau npaj los ntawm ob lub tshuab nqus tsev melting siv lub tshuab nqus tsev siv hluav taws xob arc rauv. Lub sijhawm hloov pauv ntawm Gr.38 titanium alloy tau ntsuas los ntawm 970 ± 5 degree los ntawm kev siv qhov kub siab metallography. Φ440mm ingot yog forged rau 8 firings thiab thaum kawg kub dov mus rau Φ20mm bar nyob rau hauv dov mob. Cov txheej txheem annealing yog cua txias, dej txias thiab cua txias tom qab tuav ntawm 830, 930, 950 thiab 1000 degree rau 1h feem.
Ib qho 75mm ntev ntsuas bar raug txiav los ntawm qhov tiav bar raws li cov khoom siv kho tshuab, thiab 20mm ntev ntsuas bar raug txiav raws li cov qauv metallographic kom tiav cov ntsiab lus kuaj tom qab annealing kho. Cov ntsiab lus xeem yog tsuas yog kuaj cov microstructure, chav tsev kub tensile zog thiab tensile tawg morphology nyob rau hauv txawv annealing regimes. Cov txiaj ntsig kev xeem qhia tau tias:
(1) Gr.38 alloy tuaj yeem tau txais lub zog siab thiab zoo plasticity nrog cov khoom siv kho kom zoo tom qab annealing los ntawm cua txias (los yog dej txias) tom qab tuav ntawm 930-950 degree rau 1h.
(2) Gr.38 alloy nrog 830 degree tshav kub preservation 1h tom qab cua txias annealing, yield zog tsawg, yog conducive rau tom qab ua cov ntaub ntawv
(3) Gr.38 alloy cov ntaub ntawv chav kub tensile fracture morphology yog honeycomb toughness fracture yam ntxwv, 1000 degree tshav kub preservation 1h tom qab annealing, nws tawg ntawm lub toughness ntawm lub zes yog kuj me me thiab ntiav, nws yog kuj tsis zoo plasticity.
