Titanium phaj yog ib qho ntawm cov khoom siv dav tshaj plaws hauv kev lag luam titanium khoom.Nws zoo heev originates los ntawm qhov tseeb smelting ntawm raw sponge titanium thiab refined tag nrho - txheej txheem ua.The zus tau tej cov titanium daim hlau txais TA1 / TA2 siab - purity sponge titanium ntau tshaj li cov pa oxygen (nrog rau kev sib npaug ntawm cov pa roj carbon monoxide) 150ppm), nitrogen thiab hlau (tsawg dua lossis sib npaug li 0.08%), ua kom cov khoom siv purity ncav cuag tsawg dua 99.6%.
Titanium muaj cov yam ntxwv ntawm cov khoom siv tshuaj lom neeg thiab ua rau cov pa nqus thiab oxidation.Vim li no, daim txhuam cev titanium yuav tsum tau smelted nyob rau hauv ib qho chaw siab - nqus tsev vacuum los lav lub siab purity ntawm tiav titanium daim hlau.Tam sim no, ob lub ntsiab txheej txheem tau dav siv hauv kev lag luam. Nqus Arc Remelting (VAR), cov txheej txheem kev lag luam tseem ceeb, compresses sponge titanium rau hauv cov khoom siv hluav taws xob thiab welds rau hauv cov khoom siv hluav taws xob. Cov electrodes yog melted rau hauv titanium kua los ntawm hluav taws xob arc nyob rau hauv ib tug dej -coj tooj liab crucible, thiab remelted 2 mus rau 3 zaug kom tshem tawm cov inclusions, homogenize tshuaj muaj pes tsawg leeg thiab txo segregation. Electron Beam Cold Hearth Melting (EB) yog siv rau kev tsim cov high -kawg thiab siab -purity titanium daim hlau. Nws ncaj qha bombards sponge titanium nrog electron beams kom tiav melting thiab refining nyob rau hauv ib tug dej -cooled txias hearth. Cov qauv purity siab tuaj yeem ua tiav nyob rau hauv ib qho txheej txheem melting, uas txo cov ntsiab lus impurity thiab zam cov kab mob crucible.
Tom qab smelting, titanium ingots nrog cov sib xyaw ua ke, compact qauv thiab tawg - tau txais kev ua haujlwm pub dawb. Cov ingots yog rhuab ntawm 950-1150 degree, ces raug rau ntau yam kev ntxhov siab thiab stretching txheej txheem los ntawm hydraulic presses rau forging thiab cogging. Qhov no refines cov qauv nplej, tshem tawm cov porosity sab hauv, thiab ua ntej ua cov titanium slab blanks uas ua tau raws li qhov yuav tsum tau ua ntawm kev ua haujlwm tom ntej.
Ntxiv cov txheej txheem precision yog xav tau rau titanium slab dawb paug ua. Ua ntej, multi-dhau kub dov yog nqa tawm ntawm 850-1050℃kom txo cov slab thickness ntawm 100-200mm mus rau 4-20mm thiab optimize cov yam ntxwv. Pickling yog tom qab ntawd ua kom tshem tawm cov nplai oxide thiab cov kab mob kom paub tseeb tias kev ua haujlwm raug. Txias dov ntawm chav tsev kub tuaj yeem txais yuav raws li cov khoom xav tau kom ua tiav qhov loj me hauv qab 0.5mm thiab qhov chaw siab kawg. Ntau yam kev kho mob annealing yog teem caij thaum lub sij hawm txheej txheem los tiv thaiv kev tawg los ntawm kev ua hauj lwm hardening. Thaum kawg, tiav cov khoom annealing yog ua ntawm 550-750℃kom tshem tawm cov kev ntxhov siab sab hauv, rov qab ductility thiab stabilize lub microstructure. Tag nrho cov txheej txheem tsim khoom nruj me ntsis ua raws li cov qauv hauv tsev thiab thoob ntiaj teb suav nrog GB / T thiab ASTM B265, ua kom tag nrho cov khoom siv taug qab thiab cov khoom ruaj khov.
Tsim los ntawm cov txheej txheem ua tiav saum toj no, titanium daim hlau tau siv dav hauv kev lag luam tshuaj, lub zog tshiab, aerospace, kev kho mob thiab lwm yam kev lag luam los ntawm kev tsim txiaj ntawm siab purity thiab uniform microstructure. Txhua tus txheej txheem los ntawm siab -purity sponge titanium mus rau tsim nyog tiav titanium daim hlau imposes nruj raws li cov txheej txheem precision. Cov txheej txheem kev ua kom zoo zoo li no tso cai rau cov phiaj xwm titanium nrog kev ua haujlwm zoo, ua rau lawv ua lub luag haujlwm tseem ceeb hauv txhua qhov chaw ntawm lub neej.
