Cov yam ntxwv cuam tshuam rau kev kos duab ntawm Titanium Alloy Hlau
Titanium thiab titanium alloy hlau yog siv dav hauv cov haujlwm tseem ceeb xws li aerospace fasteners, 3C cov khoom, cov iav tsom iav, cov khoom siv tsheb, cov cuab yeej kho mob, thiab cov hlua vuam. Feem ntau, thaum txoj kab uas hla ntawm titanium thiab titanium alloy hlau yog 30-40% loj dua li qhov kawg ntawm cov khoom loj, cov duab txias yog siv los muab cov khoom xaim nrog qhov raug siab.
Cov txheej txheem kev kos duab txias thiab kev tswj xyuas microstructure ntawm cov khoom kawg muaj feem cuam tshuam rau kev ua haujlwm ntawm titanium thiab titanium alloy hlau. Lub ntsiab yam tseem ceeb cuam tshuam rau kev kos duab hlau, nrog rau qhov kub thiab txias ntawm qhov nqus, suav nrog qhov zoo ntawm cov khoom siv raw, cov khoom tsis zoo, cov txheej txheem lubrication, thiab cov txheej txheem kev kos duab.
1. Raw Khoom Zoo
Chemical Composition: Cov ntsiab lus ntawm cov tshuaj tseem ceeb thiab cov ntsiab lus impurity yuav tsum tsis pub tshaj qhov tso cai. Cov khoom xws li hydrogen (H), oxygen (O), nitrogen (N), hlau (Fe), thiab silicon (Si) tuaj yeem cuam tshuam rau titanium. Piv txwv li, hydrogen tuaj yeem ua rau hydrogen embrittlement hauv titanium alloys, yog li yuav tsum muaj kev tswj hwm nruj thaum lub sijhawm tsim khoom.
Surface Quality: Cov hlau saum npoo yuav tsum tsis muaj qhov tsis xws luag xws li tawg, tawg, nti, pob ntseg, lossis delamination. Deg tsis xws luag xws li tawg thiab folds yuav tshwm sim nyob rau hauv cov ntaub ntawv raw mus rau txawv degrees. Cov teeb meem no tuaj yeem tsim cov kab nrib pleb ntawm qhov chaw, subsurface, lossis sab hauv cov hlau, uas tuaj yeem txhim kho ntxiv thaum lub sij hawm kos duab, ua rau kom muaj zog los yog tawg. Tsis zoo li cov kab nrib pleb, folds tsis pom tau yooj yim vim tias lawv feem ntau npog los ntawm cov txheej oxidation saum npoo thiab tej zaum yuav nyob twj ywm thaum kos duab.
2. Cov txheej txheem kho cua sov
Cov txheej txheem kev kho cua sov thaum lub sij hawm txias txias feem ntau yog annealing ntawm cov hlau, uas suav nrog kev kho ua ntej annealing ntawm raw khoom, nruab nrab annealing tom qab deformation, thiab zaum kawg annealing. Lub hom phiaj ntawm kev kho mob ua ntej thiab nruab nrab annealing yog los txo qhov cuam tshuam ntawm kev ua hauj lwm hardening, nce ductility, thiab optimize plasticity, ua rau cov khoom tsim nyog rau cov theem tom ntej ntawm cov txheej txheem kos duab.
3. Drawing Tuag
Hlau kos duab tuag feem ntau yog tsim los ntawm cov cemented carbide (YK6, YK8) lossis cov ntaub ntawv pob zeb diamond. Cemented carbide muaj tungsten carbide thiab cobalt, nrog tungsten carbide yog ib qho nyuaj thiab hnav-resistant, ua raws li cov khoom siv pob txha, thaum cobalt nce lub toughness ntawm alloy. Cemented carbide tuag yog siv dav hauv kev kos duab ntawm ntau yam hlau thiab hlau hlau. Pob zeb diamond tuag, nrog siab hardness thiab hnav tsis kam, yog kim dua thiab nyuaj rau txheej txheem, yog li tsuas yog siv rau kev kos duab zoo thiab ultra-fine xov hlau.
Nyob ntawm qhov longitudinal cross-sectional duab ntawm lub qhov tuag, tus qauv kos duab tuag tuaj yeem muab faib ua ob hom: arc-shaped tuag thiab conical tuag. Cov qub no feem ntau yog siv rau cov xov hlau zoo, thaum conical tuag feem ntau yog siv rau cov raj, pas nrig, thiab cov xov hlau ntxhib. Nyob ntawm lawv txoj haujlwm thaum lub sijhawm kos duab, qhov tuag feem ntau muab faib ua plaub ntu: lub khob hliav qab nkag (zaum pub noj + lubrication zone), ua haujlwm lub khob hliav qab, thaj tsam loj, thiab tawm lub khob hliav qab.
4. Kev kos duab
Kev txo qis ib ntus: titanium alloys muaj qhov ntsuas kub qis hauv chav tsev, nrog lub zog tawm los ze rau lub zog tensile, ua rau muaj qhov sib piv siab. Thaum kos cov khoom siv hlau, lub zog ntawm cov khoom tom qab tawm hauv qhov tuag yuav tsum siab tshaj qhov tawm los lub zog ntawm cov khoom hauv qhov tuag los tiv thaiv cov hlau tawg. Yog li ntawd, qhov muag tsis pom kev nrhiav kev txo qis ntau dhau ntawm kev kos duab yuav tsum zam.
Tag Nrho Kev Txo: Lub zog ntawm titanium alloy xov hlau nce nrog tag nrho cov nqi txo. Qhov no feem ntau yog vim hais tias qhov txias deformation nce, dislocation multiplication tshwm sim nyob rau hauv cov hlau nplej, ua rau cov khoom tsis kam mus rau yas deformation. Qhov no ua rau kev ua haujlwm hardening, uas ua rau cov hlau tawg thiab lub zog tensile. Txawm li cas los xij, kev ua haujlwm ntau dhau ua rau txo cov xaim toughness, dabtsi yog khoov, thiab twisting qhov tseem ceeb, thiab nyob rau hauv cov xwm txheej hnyav, nws ua nkig, nrog kev ua haujlwm qis heev.
Drawing Speed: Kev kos duab nrawm yog qhov tseem ceeb hauv kev tsim cov hlau ua cov txheej txheem thiab muaj kev cuam tshuam loj rau kev ua haujlwm ntawm cov hlau deformed. Tus nqi lim yog hais txog tus nqi ntawm kev hloov pauv hauv deformation lossis qhov txheeb ze hloov pauv ntim ib chav tsev ntawm lub sijhawm. Titanium alloys yog rhiab heev rau strain npaum li cas, thiab sib txawv deformation speeds ho cuam tshuam lawv plasticity thiab deformation kev ua tau zoo. Nyob rau hauv tib lub teeb duab, ua kom cov duab nrawm tuaj yeem txhim kho cov khoom tsim tau thiab txuag hluav taws xob, tab sis qhov zoo ntawm cov hlau thiab qhov smoothness ntawm cov txheej txheem kos duab yuav tsum tau ua kom ntseeg tau.
