Astm B265 Gr2 titanium alloy nyob rau hauv automotive lightweight manufacturing applications
Titanium thiab titanium alloys tau cim los ntawm tsawg dua, zoo biocompatibility, muaj kub kub ua, thiab tau siv dav hauv tsheb ua teb. Titanium alloy ceev tsuas yog 60% ntawm cov hlau, thiab lub zog muaj peev xwm ncav cuag ntau tshaj 800MPa, nyob rau hauv 500 degree los yog li ntawd tseem tuav zoo txhua yam khoom, thiab vuam thiab molding kev ua tau zoo dua, nyob rau hauv ntau tshaj 20 xyoo dhau los tau siv nyob rau hauv lub tsim. ntawm cov tsheb sib tw, zoo heev txo qhov zoo ntawm lub tsheb sib tw cav, tib lub sijhawm txhim kho kev ua haujlwm ntawm lub cav.
Tam sim no, titanium alloy qhov chaw siv nyob rau hauv kev tsim tsheb yog tsuas yog faib nyob rau hauv lub tsheb tso system, engine system, kis tau tus mob thiab vibration damping system thiab lub cev ncej qhov chaw.
1. Cov pa system
Cov khoom siv hluav taws xob hauv tsheb yuav tsum muaj cov khoom siv hluav taws xob kub zoo thiab kev tiv thaiv corrosion rau S, Cl ntsiab. Kev lig kev cai, cov khoom siv hluav taws xob tau ua los ntawm cov hlau tsis muaj steel, tab sis titanium alloys tau pom tias tsim nyog rau kev ua haujlwm.
Lub titanium rov qab yeeb nkab siv nyob rau hauv lub tsheb tshiab Chevrolet Corvette Z206 zoo zam pitting thiab weld corrosion teeb meem uas tshwm sim nyob rau hauv stainless hlau kav, thiab nyob rau tib lub sij hawm txhim kho roj combustion efficiency thiab acceleration, thiab shortens braking nrug.
Timet, lub chaw tsim khoom loj tshaj plaws titanium hauv Asmeskas, tau cog lus rau kev tshawb fawb thiab kev tsim kho thiab tsim cov titanium alloy tso cua tshuab, ntau lub tuam txhab Nyij Pooj kuj tau ua cov kev tshawb fawb thiab kev tsim kho, thiab tam sim no, Fuji Heavy Industries Co. , Ltd. tau tsim muaj tsawg tsawg ntawm 440 teeb ntawm titanium alloy tso cov kav dej rau tsheb.
2. Cav qhov system
Lub cav cav tsheb yog qhov siv ntau tshaj plaws titanium alloy qhov chaw hauv tsheb, titanium alloy hauv lub cav yog tsuas yog siv hauv li qub, txuas rods, crankshafts, valve rooj thiab lwm yam.
Nyiv lub tuam txhab Honda Motor siv forged titanium txuas rods hauv NSX sib tw V-6 cav; Mitsubishi Motors Corporation tsim muaj peev xwm, plaub lub tog raj kheej cav siv titanium valve caij nplooj ntoos hlav lub rooj, Porsche tsheb kuj siv titanium txuas rods.
(1) Valves
Titanium alloy li qub, Tebchaws Asmeskas thiab Nyij Pooj tau ua ntau txoj haujlwm tshawb fawb, Tebchaws Asmeskas tam sim no siv Ti-6Al-4V alloy manufacturing intake valves, kev siv Ti{{ 2}}Al-2Sn-4Zr-2Mo alloy manufacturing tso li qub; thiab Toyota Nyiv yog kev siv Ti-6Al-4V/Ti B alloy npaj ntawm cov khoom noj, kev siv Ti-Al-Zr-Sn-Mo-Nb- Si/Ti B alloy rau npaj cov pa tawm valve. Cov hom titanium alloys no muaj qhov zoo ntawm cov khoom siv hluav taws xob zoo, oxidation thiab creep tsis kam, txhim kho lub cav kev ua tau zoo thiab ua kom lub tsheb ceev.
(2) Lub rooj zaum valve
Titanium alloy valve lub rooj tau siv dav hauv cov tsheb sib tw thiab cov tsheb sib tw, txhua xyoo ntau tshaj 250,000 teeb, feem ntau yog siv Ti-6Al-4V lossis Ti{{4 }}Al-2Cr-1Fe alloy npaj, vim qhov zoo ntawm lub rooj zaum valve yog qhov yooj yim, yog li nyob rau hauv cov kev xav tau ntawm machining tsis siab, thiab tsis xav tau kev kho tshwj xeeb, tus nqi yog pheej yig dua, thiab nyob rau hauv lub tsheb qhov hnyav txo cov nyhuv yog pom tseeb.
(3) Txuas pas nrig
Kev siv cov titanium txuas rods tuaj yeem txo qhov zoo ntawm lub cav thiab txhim kho kev ua haujlwm ntawm lub tsheb. Tam sim no, cov khoom siv tseem ceeb yog Ti-6Al-4V alloy. Ltd. tam sim no tab tom tsim ob-theem titanium alloy, Ti-3Al-2V-0.5V.
Ti-3Al-2V-0.2Si-0.47Ce-0.27La, cov hlau muaj machinability zoo, mechanical zog, qaug zog zog thiab corrosion kuj yog kuj zoo heev, yuav tsum tau siv nyob rau hauv lub cav acceleration, deceleration ntawm cov khoom txuas txuas.
(4) Crankshaft
Titanium alloy crankshaft tsis tau siv dav tam sim no, tab sis Nyij Pooj tau tsim tshwj xeeb Ti-3Al-2.5V alloy tau raug txheeb xyuas nyob rau hauv lub tsheb sib tw Honda saum toj no, hauv kev txo qis zoo tib lub sijhawm, lub cav ceev tau nce los ntawm 700r / min, ua pov thawj qhov zoo tshaj ntawm titanium alloy crankshaft. Tib lub sijhawm, Nyiv tau nyob rau hauv kev sim tsim ntawm Ti-5Al-2Cr-Fe alloy crankshaft, cia siab tias titanium alloy nyob rau hauv lub crankshaft Cheebtsam yuav tsum tau siv dav.
3. Damping systems
Lub hauv paus tseem ceeb ntawm lub tsheb vibration-damping suspension system yog lub caij nplooj ntoos hlav ncua. Titanium alloy muaj lub zog tshwj xeeb dua, qis shear modulus thiab qaug zog ntau dua li cov hlau dav dav rau cov tsheb ciav hlau, uas ua rau nws tsim nyog rau kev tsim cov tsheb vibration damping springs. Txij li thaum lub caij nplooj ntoos hlav deflection thiab tus naj npawb ntawm cov coils yog proportional rau ib leeg, thiab shear modulus ntawm cov khoom yog inversely proportional rau ib leeg, titanium alloy springs yuav tsum tau tsawg coils tshaj steel springs kom ua tiav tib lub caij nplooj ntoos hlav teb, uas zoo txo qhov zoo. ntawm springs thiab txuag chaw.
Nyob rau tib lub sijhawm, titanium alloy springs kuj tseem tuaj yeem ua kom lub zog resonance ntawm lub caij nplooj ntoos hlav thiab txhim kho nws lub neej kev pab. Tam sim no, feem ntau ntawm cov titanium alloy springs yog npaj nrog ib-theem-titanium alloy. Lub teb chaws Yelemees Volkswagen tau siv Lupo FSI titanium iav springs hauv qee lub tsheb, nrog rau kev siv txog 3,500 lub tsheb.
4. Lub cev ncej
Rau lub cev thav duab Cheebtsam, titanium alloy lub siab tshwj xeeb lub zog, tsawg ntom thiab zoo corrosion kuj qhia tau hais tias nws yog ib tug zoo khoom rau kev npaj ntawm lub cev ntas. Tam sim no, qee lub tuam txhab tsheb tau siv cov titanium alloys rau cov khoom xws li iav brackets thiab nres caliper pistons. Cov khoom sib kis, Nyiv tam sim no tab tom tsim cov txheej txheem siab spin molding rau kev npaj ntawm titanium alloy plhaub txheej txheem, piv nrog steel plhaub, titanium alloy plhaub zoo txo qhov cuam tshuam ntawm flywheel, zoo cushioning nyhuv.
Tsis tas li ntawd, titanium alloy kuj tseem siv rau hauv tsheb fasteners thiab lwm yam khoom, nrog rau kev txhim kho txuas ntxiv ntawm titanium alloy kev npaj thiab kev lag luam tsheb, titanium alloy yuav siv rau hauv tsheb thiab cov khoom siv.
5. Qhov tseem ceeb ntawm titanium alloy rau tsheb lub teeb yuag
Cov koom haum tshawb fawb txawv teb chaws tau pom tias thaum tag nrho cov tsheb zoo txo qis los ntawm 10%, kev siv roj tuaj yeem txo los ntawm 6% ~ 8%. Tseem muaj cov kev tshawb fawb uas qhia tau hais tias rau txhua txhua 91kg ntawm qhov hnyav txo nyob rau hauv ib lub tsheb, qhov nruab nrab roj ib liter yuav tau tsav 0.43km ntxiv. Yog li ntawd, nrog rau kev txhim kho tas mus li ntawm Tuam Tshoj txoj kev lag luam thiab kev lag luam tsheb ntau zuj zus, lub tsheb sib tsoo tsheb tau dhau los ua ib txoj hauv kev tseem ceeb tshaj plaws los txo kev siv hluav taws xob thiab huab cua paug.
titanium thiab titanium alloy cov ntaub ntawv tau siv nyob rau hauv ib tug loj tus naj npawb ntawm cov tsheb qhov chaw vim lawv zoo heev lub cev thiab tshuaj zog. Kev siv cov ntaub ntawv titanium tsis yog tsuas yog txhim kho kev ua haujlwm ntawm lub tsheb thiab kev nyab xeeb coefficient, tab sis kuj tseem ua lub luag haujlwm tseem ceeb hauv kev teeb pom kev zoo ntawm lub tsheb, txo qhov hnyav ntawm lub tsheb, txo cov roj noj.
Lub tsheb tso pa siv titanium tailpipe - rov qab cov yeeb nkab sib dhos piv rau cov txheej txheem stainless hlau ib txwm muaj, tuaj yeem txo qhov hnyav li 8.2 kg, thiab lub cav qhov chaw hauv lub valve, txuas pas nrig thiab lwm yam khoom siv titanium alloy cov khoom siv cov khoom siv hlau thiab cam khwb cia hlau. cov ntaub ntawv tuaj yeem txo qhov zoo ntawm lub cav.
Raws li kev tshawb fawb ntawm Japanese tsheb kev lag luam, tsheb fais fab valve siv li ntawm 0.8kg ntawm titanium qhov sib npaug rau 20kg ntawm steel qhov chaw kom ua tiav cov nyhuv; txhua titanium valve lub rooj piv rau steel valve lub rooj yuav txo tau qhov zoo ntawm txog 10g; txuas pas nrig thiab crankshaft siv nyob rau hauv titanium alloy, qhov zoo tshaj plaws nyob rau hauv txo lub cav zoo.
Saum lub damping system, txhua lub caij nplooj ntoos hlav titanium alloy tuaj yeem txo qhov zoo ntawm steel springs los ntawm ntau tshaj 60%, 4 ncua kev kawm ntawv ib lub tsheb xam, tom qab hloov cov titanium alloy springs, txhua lub tsheb tuaj yeem txo qhov hnyav ntawm 9 ~ 13.6 kg. Tsis tas li ntawd, qhov zoo ntawm titanium alloy muffler tsuas yog 5 ~ 6 kg, uas yog 40% sib zog dua li ntawm stainless hlau muffler.
Piv txwv li, piv txwv li, piv txwv li, yog cov titanium alloy pib qhov chaw uas twb muaj lawm los hloov cov tsoos qhov chaw, lub tsheb tag nrho qhov zoo yuav yog li ntawm 1500kg los ntawm qhov qub qhov hnyav txo mus txog 1000kg, qhov hnyav poob mus txog 30%, tag nrho cov roj noj yuav raug txo los ntawm ntau tshaj 20%, uas yuav txo tau lub ntiaj teb no cov roj noj, thiab zoo alleviate cov teeb meem ntawm lub zog tsis txaus thiab ib puag ncig muaj kuab paug.
Cov ntaub ntawv saum toj no qhia tau hais tias kev siv cov titanium alloy nyob rau hauv lub tsheb lub teeb yuag nyhuv yog pom tseeb, nyob rau hauv lub niaj hnub tsheb kev lag luam, yuav tsum tau txuas ntxiv mus tsim titanium thiab titanium alloy nyob rau hauv daim ntawv thov ntawm lub tsheb qhov chaw thiab cov khoom siv technology, kom nce qhov feem ntawm titanium alloy nyob rau hauv lub kev siv tsheb.
Tam sim no, daim ntawv thov ntawm titanium alloy nyob rau hauv Tuam Tshoj txoj kev lag luam tsheb tseem tsuas yog nyob rau hauv kev sim theem. Qhov teeb meem tseem ceeb yog tias tus nqi ntawm cov khoom siv titanium alloy siab dhau, thiab cov khoom tsis yooj yim rau kev ua haujlwm.
Yog li ntawd, lub luag hauj lwm tseem ceeb nyob rau hauv lub neej yav tom ntej yuav tsum yog txo tus nqi ntawm titanium alloy qhov chaw los ntawm kev tsim cov khoom pheej yig titanium alloy cov ntaub ntawv, txo cov nqi ntawm titanium alloy raw cov ntaub ntawv, thiab lwm yam. txhim kho cov txheej txheem txheej txheem.
