Dab tsi yog qhov zoo ntawm Titanium Alloy hauv Muffler Daim Ntawv Thov?
Titanium alloy muaj cov yam ntxwv zoo xws li lub teeb yuag, tiv thaiv corrosion thiab formability, thiab muaj kev nkag siab zoo ntawm cov khoom kim heev thiab muaj tswv yim, thiab siv rau hauv mufflers. Nyob rau hauv cov nqe lus ntawm lub tsheb, vim hais tias lub muffler yog muab zais nyob rau hauv ib tug tsis pom qhov chaw, thiab nws high-end kev txiav txim siab thiab creativity yuav tsis tau hais txog, lub tso cua kub yog siab tshaj ntawm lub locomotive. Raws li cov teeb meem ntawm qhov kub thiab txias oxidation tsis kam thiab siab kub lub zog, Titanium alloys raug txwv kom siv rau hauv cov mufflers tshwj xeeb. Hauv kev teb rau cov xwm txheej zoo sib xws, txhawm rau kom tsis txhob muaj kev puas tsuaj loj rau kev tsim ntawm titanium alloys, qee lub tuam txhab tau tsim Ti-1.5Al uas txhim kho qhov kub thiab txias oxidation tsis kam thiab lub zog kub. Titanium yog tsim los ntawm lub cav thiab catalyst hloov dua siab tshiab, thiab lwm yam, thiab qhov tso cua sov tau nce los ntawm qhov siab dhau los mus rau 700 ~ 750 degree, yog li nws tau siv rau hauv muffler ntawm lub tsheb. Xyoo 2009, ASTM cov qauv tau sau npe, thiab patents tau txais los ntawm Tebchaws Meskas, United Kingdom, Lub Tebchaws Yelemees, Ltalis, thiab Fabkis.
Raws li lub tsheb muaj kev txhawj xeeb, ib feem tom qab lub hauv paus yeeb nkab muaj qhov kub thiab txias, tab sis nyob ntawm seb hom tsheb, txawm tias qhov kub ntawm qhov no tuaj yeem ncav cuag 700 ~ 800 degree. Thaum cov hlau titanium raug rau qhov kub siab ntev ntev, raws li cov pa oxygen diffusion thiab intrusion, lub npoo ntawm qhov saum npoo yuav ua rau tsis yooj yim vim yog tsim cov txheej tawv tawv. Nyob rau tib lub sijhawm, qhov sib piv oxidation tshwm sim, thiab cov hlau titanium reacts, uas yuav txo nws lub zog. Tsis tas li ntawd, txo qis qaug zog thiab embrittlement tshwm sim vim coarsening ntawm crystal nplej. Muaj qhov chaw uas Ti-1.5Al tsis tuaj yeem ua raws li nws cov oxidation tsis kam nyob rau hauv ib puag ncig kub kub. Yog li ntawd, yog tias nws muaj peev xwm tsim tau cov khoom siv titanium uas khaws cov kub oxidation tsis kam ntawm Ti-1.5Al thiab siab dua, thiab tswj cov yam ntxwv ntawm lub zog ntawm Ti-1.5Al hauv kev tsim thiab kev ua haujlwm ntawm qhov sib xyaw ua ke ntawm muffler system, nws yuav yog qhov zoo tshaj plaws suab attenuation khoom siv.
Ti-0.5A1-0.45Si-0.2Nb titanium alloy yog suav tias yog pheej yig dua. Piv nrog rau cov ntaub ntawv muffler uas twb muaj lawm thiab JIS 2 hom ntshiab titanium thiab Ti-1.5Al, titanium alloy no muaj qhov kub thiab txias oxidation tsis kam. Cov ntaub ntawv uas twb muaj lawm no tsis tuaj yeem siv vim muaj teeb meem xws li embrittlement. Xav txog kev siv nws rau qhov kub thiab txias ib puag ncig muaj peev xwm. Nyob rau tib lub sijhawm, qhov kub thiab txias zog yog ze rau ntawm Ti-1.5Al. Piv nrog JIS 2 hom ntshiab titanium, ntawm 400 degree, lub zog tawm los yog 3 ~ 4 npaug ntawm cov titanium ntshiab, thiab lub zog tensile yog 2 ~ 3 npaug ntawm cov ntshiab titanium. Yog li ntawd, cov titanium alloy no muaj cov yam ntxwv ntawm qhov tsim nyog lub zog kub zoo li Ti-1.5Al. Tsis tas li ntawd, cov hlau no tuaj yeem xav kom muaj tib theem ntawm kev tsim ua JIS 2 hom ntshiab titanium.
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