Kev Ntsuam Xyuas Kev Kho Mob TC4ELI Titanium Alloy Phaj
Paub meej: Ib qho kev kho mob TC4ELI titanium alloy phaj tau pom tias muaj kev nkag mus rau lub teeb ci ntsa iab thaum kuaj xyuas qis. Cov hom thiab qhov ua rau muaj qhov tsis xws luag tau txheeb xyuas los ntawm kev tshuaj xyuas metallographic, scanning electron microscope tsom xam, lub zog spectrum tsom xam thiab kev sim hardness. Cov txiaj ntsig Nws qhia tau hais tias qhov tsis xws luag no yog titanium-nplua nuj + interstitial keeb cais tsis xws luag, uas yog tshwm sim los ntawm qhov tsis sib xws ntawm qhov loj me ntawm titanium daim txhuam cev thiab qhov tsis sib xws ntawm cov khoom sib xyaw nruab nrab ntawm cov hlau sib xyaw thaum lub sij hawm tsim cov txheej txheem ntawm titanium alloy ingots. Nws raug pom zoo kom txo lossis tshem tawm qhov tsis xws luag los ntawm kev tswj cov khoom siv raw thiab cov txheej txheem smelting. qhov tsis xws luag.
TC４ELI titanium alloy tau dhau los ua kev kho mob kev cog hniav vim nws cov biocompatibility zoo, tsis tshua muaj elastic modulus, tsawg ntom, zoo tiv thaiv corrosion, non-toxicity, siab yield zog, ntev qaug zog lub neej, loj plasticity ntawm chav tsev. kub, thiab yooj yim tsim. Ib qho khoom siv zoo tshaj plaws rau cov cuab yeej kho mob [1-2]. Kev kho mob TC4ELI titanium alloy daim hlau feem ntau yog siv rau hauv kev kho pob txha taub hau, pob txha grafting, thiab lwm yam, uas muaj cov kev xav tau ntau dua ntawm lub zog, qaug zog lub neej, plasticity, thiab lwm yam. Raws li GB / T 13810-2017«Kev phais titanium thiab titanium alloy ua cov ntaub ntawv siv kho mob », yog tias kev sib cais, cov khoom siv hlau lossis cov khoom tsis yog xim hlau thiab lwm yam kev pom kev pom ntawm cov hlau tsis xws luag pom nyob rau hauv cov qauv qis-magnification ntawm titanium alloy cov ntaub ntawv siv rau hauv cov khoom cog, cov khoom batch ntawm cov khoom yuav raug txiav txim tias tsis tsim nyog .Segregation yog qhov tshwm sim ntawm qhov tsis sib xws micro cheeb tsam muaj pes tsawg leeg ntawm titanium alloy cov ntaub ntawv hauv cov qauv. Kev kho mob TC4ELI phaj yog + hom ob-theem titanium alloy. Yog hais tias nws cov micro- cheeb tsam muaj pes tsawg leeg tsis sib xws, nws yuav ua rau muaj kev txawv txav hauv macro thiab microstructure, ua rau muaj qhov txawv txav. Muaj qhov sib txawv tseem ceeb ntawm qhov nyuaj ntawm thaj chaw ib txwm muaj thiab thaj chaw ib txwm muaj, uas yuav ua rau qhov tsis sib xws ntawm cov khoom siv titanium alloy, yog li txo cov khoom siv zog, qaug zog lub neej thiab plasticity, thiab thaum kawg ua rau cov khoom tsis ua haujlwm thaum ntxov [{{ 13}}] ib.
Thaum lub sij hawm qis-magnification soj ntsuam ntawm ib qho kev kho mob TC4ELI titanium alloy phaj, ib tug txawv txav band-zoo li tus cheeb tsam nrog ib tug dav ntawm txog 5 hli tau pom. Thaum ib feem ntawm nws tau cuam tshuam thiab pom ntawm qhov qis-magnification, nws tau pom tias thaj chaw zoo li lub suab paj nruag yog qhov ci ci. Txhawm rau txhawm rau txiav txim siab yam tsis xws luag, nws yog ib qho tsim nyog los txheeb xyuas qhov tsis xws luag. Tus sau tau tshuaj xyuas thiab txheeb xyuas qhov ua rau.
1 Kev kuaj lub cev thiab tshuaj lom neeg
1.1 Metallographic xeem
Siv Observer. AIM-type ZEISS metallographic microscope tau siv los ua kev kuaj xyuas metallographic ntawm thaj chaw ci ntsa iab thiab ib puag ncig ntawm TC4ELI titanium alloy phaj. Raws li tuaj yeem pom los ntawm daim duab 2, thaj chaw ci ntsa iab yog ib theem equiaxed qauv, uas qhia txog kev sib cais zoo li cov yam ntxwv, thaum thaj chaw ib txwm nyob hauv cov qauv ntawm TC4ELI titanium alloy ua tiav hauv cheeb tsam + ob-theem, tag nrho cov thawj cov ciam teb yog tag nrho tawg, yog li nws tuaj yeem txiav txim siab tias thaj chaw ci ntsa iab yog qhov tsis xws luag.
1.2 Scanning electron microscopy tsom xam
Lub JSMG6700 txias teb emission scanning electron microscope (SEM) tau siv los soj ntsuam lub morphology ntawm lub ci band cheeb tsam thiab ib txwm cheeb tsam ntawm TC4ELI titanium alloy phaj. Raws li tuaj yeem pom los ntawm daim duab 3, cov qauv ib-theem equiaxed hauv thaj chaw ci ntsa iab yog qhov pom tseeb dua, thiab thaj chaw ib txwm qhia + Cov yam ntxwv ntawm cov txheej txheem txheej txheem ntawm ob-theem cheeb tsam yog sib xws nrog cov txiaj ntsig ntawm kev tshuaj xyuas metallographic, thiab nws tau txiav txim siab ntxiv tias thaj chaw ci ntsa iab yog qhov sib cais tsis raug.
1.3 Kev txheeb xyuas lub zog spectrum
Lub zog spectrometer (EDS) txuas nrog lub tshuab ntsuas hluav taws xob siv hluav taws xob tau siv los ua cov tshuaj ntsuam xyuas micro ntawm thaj chaw ci ntsa iab thiab thaj chaw ib puag ncig ntawm TC4ELI titanium alloy phaj. Cov txiaj ntsig kev soj ntsuam tau pom nyob rau hauv Table 1. Nws tuaj yeem pom tias cov ntsiab lus ntawm vanadium hauv thaj chaw ib txwm muaj me ntsis siab dua tus nqi tus qauv. Tsis tas li ntawd, cov ntsiab lus ntawm lwm cov ntsiab lus tau ua raws li qhov yuav tsum tau ua ntawm GB / T 3620.1-2016 "Titanium thiab titanium alloy qib thiab tshuaj muaj pes tsawg leeg"; titanium, aluminium thiab vanadium cov ntsiab lus nyob rau hauv lub ci band cheeb tsam tsis nyob rau hauv tus txheej txheem ntau yam, thiab muaj pom tseeb titanium-nplua nuj cov ntsiab lus. , tsis zoo nyob rau hauv txhuas thiab cov neeg pluag nyob rau hauv vanadium, thiab cov ntsiab lus ntawm cov pa oxygen yog lub sab sauv txwv ntawm tus txheej txheem ntau yam, nws yog txiav txim hais tias TC4ELI titanium alloy phaj muaj titanium nplua nuj segregation defects.
1.4 Hardness test
Kev sib cais ntawm cov titanium alloys tuaj yeem muab faib ua cov sib cais nyuaj (qhov hardness ntawm qhov sib cais yog siab tshaj qhov hardness ntawm ib puag ncig ib puag ncig, kuj hu ua brittle segregation) thiab soft segregation (qhov hardness ntawm qhov sib cais yog qis dua qhov hardness. thaj chaw ib txwm muaj) raws li qhov sib txawv ntawm qhov nyuaj ntawm qhov sib cais thiab thaj chaw ib txwm muaj. Kuj tseem hu ua non-brittle segregation). Micro-Vickers hardness tests tau ua nyob rau ntawm qhov chaw ci ntsa iab thiab ib puag ncig ntawm TC4ELI titanium alloy phaj. Cov txiaj ntsig tau ntsuas yog 383HV thiab 327HV feem. Nws tuaj yeem pom tau tias qhov nyuaj ntawm qhov chaw ci ntsa iab yog qhov siab dua li ntawm thaj chaw ib txwm muaj. Hom kev sib cais hauv thaj chaw ci ntsa iab yog kev sib cais [11].
2 Kev Ntsuam Xyuas thiab Kev Sib Tham
Qhov ci ntsa iab ntawm TC4ELI titanium alloy daim ntawv yog qhov tsis xws luag. Qhov teeb meem no yog tshwm sim los ntawm qhov tsis tiav alloying ntawm cov khoom nruab nrab ntawm cov alloys. Nws yog titanium-nplua nuj segregation, tab sis nws tsis yog ib qho kev sib cais ntawm titanium-nplua nuj vim hais tias qhov hardness ntawm titanium-nplua nuj segregation cheeb tsam yuav tsum yog nws qis dua qhov chaw ib txwm [12], thiab hardness ntawm lub segregation defect cheeb tsam ( thaj tsam ci ntsa iab) ntawm TC4ELI titanium alloy daim ntawv yog siab dua li ntawm thaj chaw ib txwm muaj, uas yog raws li cov yam ntxwv ntawm kev sib cais ntawm cov khoom sib txawv. Cov ntsiab lus interstitial tshwj xeeb yog xa mus rau oxygen, carbon, thiab nitrogen. cov ntsiab lus. Cov ntsiab lus siab ntawm cov pa oxygen hauv cheeb tsam kev sib cais tsis raug txheeb xyuas qhov tshwm sim no. Qhov kev nplua nuj ntawm cov ntsiab lus interstitial yuav ua rau cov beta theem hloov pauv kub ntawm titanium alloys, nce alpha theem hardness, thiab ua rau cov khoom nkig. Hauv cov ntsiab lus, TC4ELI titanium Hom kev sib cais tsis xws luag hauv cov nplooj ntawv alloy yog titanium-nplua nuj + interstitial element segregation.
Qhov ua rau ntawm qhov kev sib cais no feem ntau cuam tshuam nrog cov txheej txheem smelting ntawm titanium alloy. Qhov kev sib cais tsis sib xws twb tau tsim nyob rau hauv kev tsim cov ingots. Tam sim no, Tuam Tshoj tus titanium alloy ntau lawm tuam txhab uas muag feem ntau txais yuav peb-pass lub tshuab nqus tsev melting consumable electric arc rauv smelting txoj kev, uas yog ua nyob rau hauv lub electrode npaj txheej txheem. Kev siv tsis raug tuaj yeem ua rau cov hlau tsis huv lossis tsim cov refractory oxides thiab nitrides. Kev xaiv tsis raug ntawm tam sim no thiab qhov hluav taws xob yuav ua rau thaj tsam melting tsis ua kom muaj qhov sib npaug thermal thaum lub sij hawm melting, thiab tseem yuav ua rau cov kev hloov hauv qhov tob ntawm lub pas dej molten, uas ua rau qhov tsis sib xws ntawm cov titanium daim txhuam cev. Kev faib tsis sib npaug ntawm tus tswv alloy sib tov yuav ua rau kom muaj kev nplua nuj thiab ua tiav ntawm cov ntsiab lus ntawm cov khoom siv hauv zos, ua rau cov theem kev hloov pauv hauv cheeb tsam no mus rau deviate. Thaum lub sij hawm tom qab txheej txheem kub, nws yuav maj mam hloov mus rau hauv ib qho kev txawv txav thiab tsim kev sib cais tsis xws luag. [12 G18].
3 Cov lus xaus thiab cov lus qhia
TC4ELI titanium alloy nplooj ntawv muaj titanium-nplua nuj + interstitial caij cais tsis xws luag. Qhov teeb meem no yog tshwm sim los ntawm qhov tsis sib xws ntawm qhov loj me ntawm titanium daim txhuam cev thiab qhov tsis sib xws ntawm cov khoom sib xyaw nruab nrab ntawm cov hlau sib xyaw thaum lub sij hawm tsim cov txheej txheem ntawm titanium alloy ingots.
Nws raug nquahu kom txo lossis tshem tawm cov kev tsis zoo no los ntawm kev ntxiv dag zog rau kev tswj cov khoom siv raw thiab cov khoom sib tov, nrog rau kev xaiv ntawm qhov hluav taws xob thiab tam sim no thaum lub sij hawm electrode npaj thiab smelting txheej txheem.
cov ntaub ntawv:
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