Kub extrusion ntawm BT9 titanium pas nrig thiab kev ua haujlwm ntawm qis magnification dawb ci thaiv
Kub extrusion ntawm titanium alloy rods extrudes hmoov ntawm elevated kub kom ua tiav tag nrho densification ntawm cov khoom. Txoj kev kub extrusion tuaj yeem tswj tau qhov muaj pes tsawg leeg ntawm cov khoom thiab cov qauv sab hauv ntawm cov hlau. Txoj kev kub extrusion tuaj yeem muab faib ua ob hom: cov txheej txheem qhwv kub extrusion thiab cov txheej txheem tsis qhwv kub extrusion.
Rau cov khoom siv hlau titanium thiab titanium alloy hmoov, txhawm rau tiv thaiv cov khoom oxidation, encapsulation kub extrusion txoj kev yog feem ntau siv. Lub sijhawm no, lub hnab ntim tau npaj ua ntej, thiab cov hmoov los yog ntsuab compact yog muab tso rau hauv lub hnab. Tom qab pre-extraction thiab sealing, nws yog muab tso rau hauv lub extruder rau kub extrusion.
Cov ntaub npog siv nyob rau lub sijhawm no yuav tsum muaj cov thermoplasticity zoo, tsis tsim cov khoom siv hlau nrog cov khoom tso, yooj yim tev tawm tom qab kub extrusion, qhov chaw yooj yim, thiab tus nqi qis. Cov hlau me me los yog cov hlau tsis muaj steel hlau feem ntau yog siv.
Thawj txheej txheem ntawm kub extrusion ntawm titanium alloy rods yog los ua ke sib sau, sintering thiab thermal ua kom ncaj qha tau txais cov pob zeb diamond khoom nrog zoo mechanical zog.
Cov txheej txheem thib ob yog los tsim cov titanium thiab titanium alloy hmoov. Tom qab sintering, npaj sintered billet yog kub extruded (rau Ti-32Mo alloy, kub 1000-1100 degree) kom tau txais cov khoom zoo tshaj plaws ntawm titanium alloy khoom. Cov nyhuv ntawm extrusion piv rau cov khoom ntawm titanium cov ntaub ntawv. Raws li tuaj yeem pom los ntawm lub rooj, titanium cov ntaub ntawv nrog qhov kev xav tau ntawm 98.6% -99.1% tuaj yeem tau.
Cov txheej txheem thib peb ntawm titanium alloy rods yog cov txheej txheem extrusion ntawm cov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob Cov txheej txheem suav nrog: npaj cov kab noj hniav thiab txiav txim siab qhov kab noj hniav raws li qhov xav tau qhov kawg ntawm cov khoom loj ntxiv rau extrusion coefficient; assembling lub casing. Muab cov hmoov tso rau hauv cov kab noj hniav thiab co kom ruaj khov los ntawm kev co; tshem tawm, tshem tawm thiab kaw lub hnab; extrusion ntawm ib tug tej yam kub thiab extrusion piv; tshem tawm lub hnab.
Kev ua cov txheej txheem ntawm qhov tsis tshua muaj magnification dawb ci thaiv ntawm BT9 titanium pas nrig
Hauv kev tsim khoom tiag tiag, tsis muaj qhov txawv txav tau pom thaum kuaj pom qhov tsis txaus ntseeg ntawm ib pawg ntawm BT9 titanium alloy rods. Txawm li cas los xij, thaum kuaj xyuas qis qis, ib qho dawb ci thaiv tau pom nyob hauv nruab nrab ntawm tus pas nrig. Cov kws tshawb fawb tau siv metallographic nrhiav kom pom thiab lub zog spectrum tsom xam cov laj thawj ntawm kev tsim cov pob zeb dawb, uas yuav muaj lub luag haujlwm tseem ceeb hauv kev tsim khoom ntawm titanium alloy tom qab.
Cov khoom siv hauv kev sim yog Φ750mm ingot uas tau smelted peb zaug los ntawm lub tshuab nqus tsev consumables. Tom qab ob qho kev ntxhov siab thiab ob daim duab kos los ntawm thaj tsam theem, Φ230mm bar tau txais los ntawm ib qho kev ntxhov siab thiab ntau qhov hluav taws kub kos duab hauv cheeb tsam + theem. Cov pas nrig tau dhau los ua ob chav annealing kub kho raws li tus qauv yuav tsum tau ua. Cov pas nrig polished tau raug tshuaj xyuas siv kev kuaj ultrasonic thiab tsis pom muaj qhov txawv txav. Thaum lub bar tau coj mus kuaj rau qis-magnification soj ntsuam, nws tau pom tias cov pob nyiaj ci ci tau tshwm sim ntawm cov qauv qis-magnification. Thaum tib txoj hauj lwm ntawm lub bar tau txuas ntxiv mus kuaj thiab tshuaj xyuas ntawm qhov tsis tshua muaj qhov loj me, cov thaj ua rau thaj dawb tseem muaj nyob hauv tib qho, qhia tias cov thaj ua rau thaj dawb dawb yog qhov tsis xws luag. Txhawm rau txheeb xyuas qhov ua rau ntawm qhov ci ntsa iab dawb, ib qho qauv tau npaj los ntawm qhov ci ntsa iab dawb, thiab kev tshuaj xyuas metallographic thiab cov tshuaj ntsuam xyuas micro-component tau ua los ntawm kev siv lub tshuab ntsuas metallographic, scanning electron microscope thiab lub zog spectrometer feem; Nyob rau tib lub sijhawm, ntawm cov qauv qis-magnification nrog dawb ci ntsa iab thaiv, coj cov qauv ntawm thiab ze ntawm lub teeb ci ntsa iab rau chav ntsuas kub tensile kuaj xyuas qhov cuam tshuam ntawm lub teeb ci dawb ntawm chav tsev kub tensile zog ntawm titanium rods. Cov txiaj ntsig tau pom tias:
(1) Los ntawm kev tshuaj ntsuam xyuas high-magnification, nws tau pom tias theem cov ntsiab lus nyob rau hauv lub ci ntsa iab yog qhov qis dua cov ntsiab lus theem, thiab tsis muaj qhov pom tseeb ciam teb ntawm cov dawb ci thaiv thiab cov matrix. Yog li ntawd, nws tuaj yeem txiav txim siab tias qhov dawb ci thaiv yog tshwm sim los ntawm kev sib cais ntawm cov khoom. Kev tshawb xyuas lub zog ntxiv tau pom tias cov ntsiab lus ntawm Al, Mo, Zr, thiab Si alloy cov ntsiab lus hauv cov xim dawb ci ntsa iab tau qis dua cov ntsiab lus ntawm matrix, thaum cov ntsiab lus Ti tau siab dua cov ntsiab lus matrix. Yog li ntawd, nws tuaj yeem txiav txim siab tias qhov dawb ci thaiv yog tshwm sim los ntawm kev sib cais ntawm Al, Mo, Zr, thiab Si alloy ntsiab. Nws yog titanium-nplua nuj segregation thiab yog metallurgical tsis xws luag.
(2) Ua ke nrog qhov tshwm sim uas kev sib cais muaj qhov tob, nws tuaj yeem txiav txim siab tias kev sib cais yog tshwm sim los ntawm kev sib xyaw tsis sib xws. Txij li thaum lub tshuab nqus tsev melting txheej txheem yog lub regional melting, melting thiab solidification tshwm sim nyob rau tib lub sij hawm, thiab lub melting homogenization nyhuv yog tsis zoo. Yog li, yog tias cov khoom siv raw sib xyaw tsis sib xws, qhov sib xyaw ntawm cov ingot tom qab smelting yuav tsis sib xws, ua rau muaj kev sib cais.
