Titanium khoom zoo thiab shortcomings
Titanium khoom zoo thiab shortcomings
titanium alloy cov ntaub ntawv muaj cov khoom zoo heev thiab tau siv dav hauv aerospace thiab lwm yam tseem ceeb thiab kev ua haujlwm hauv pej xeem, kev nce qib thiab kev siv titanium thiab titanium alloy cov ntaub ntawv tseem ceeb heev. Nyob rau hauv tib daim ntawv thov teb, stainless hlau, tooj liab alloy cov ntaub ntawv thiab nickel raws li alloy cov ntaub ntawv kuj siv nyob rau tam sim no. Txawm li cas los xij, titanium alloy cov ntaub ntawv yog cov ntaub ntawv zoo heev nyob rau hauv cov nqe lus ntawm lub zog tshwj xeeb, corrosion kuj thiab kub ua hauj. Nyob rau tib lub sijhawm, titanium alloy cov ntaub ntawv muaj qhov zoo ntawm daim ntawv thov piv nrog rau lwm cov ntaub ntawv raws li tus nqi ntawm cov khoom siv raw, cov khoom siv raw, cov nqi ua thiab cov khoom ntim titanium.
1. Cov khoom zoo heev ntawm titanium alloys
1.1 siab tshwj xeeb lub zog
Kev sib piv ntawm qhov ceev thiab lub zog tshwj xeeb ntawm titanium thiab lwm yam khoom siv hlau
| Hlau | Titanium | Hlau | Aluminium | Tooj |
| Qhov ceev (g / cm3) | 4.5 | 7.8 | 2.7 | 8.9 |
| Lub zog tshwj xeeb (nruab nrab) | 29 | 23 | 21 | 7 |
Kev sib piv ntawm Tensile Strength thiab Yield Strength ntawm Titanium thiab Lwm Cov Hlau
| Lub zog | Titanium Ti-6Al4v | Stainless hlau 316L | Aluminium alloy | Copper alloy |
| Tensile zog (Mpa) | 960 | 620 | 470 | 550 |
| Yield zog (Mpa) | 892 | 310 | 294 | 210 |
1.2 Zoo heev corrosion kuj
Seawater high-speed yaig corrosion test
Khoom siv | Corrosion tus nqi | hauv zos corrosion tob / hli | Mark | |
| g/(m2*d) | mm/a | |||
| GR 2 | 0 | - | 0 | Tsis muaj corrosion ntawm qhov chaw |
| TC 4 | 0 | 0 | 0 | Tsis muaj corrosion ntawm qhov chaw |
| B30 | 0.14 | 0.005 | 0.04 | me ntsis corroded |
| H59 | 1.20 | 0.052 | 0.20 | me ntsis corroded |
| Ntshiab tooj liab | 19.88 | 0.811 | 0.35 | tsis sib xws corrosion |
1.3 tsis-magnetic
Cov cuab yeej tsis sib nqus ntawm cov khoom siv titanium alloy tuaj yeem txhim kho cov khoom siv los tiv thaiv kev cuam tshuam ntawm cov khoom siv, nce qhov zais, thiab xyuas kom meej tias nws tuaj yeem siv rau submarine shells thiab nkoj shells.
1.4 Zoo heev biocompatibility thiab tsis tshua muaj elastic modulus
Kev sib piv ntawm Elastic Modulus ntawm Titanium thiab lwm yam khoom siv hlau
Hlau | Ntshiab titanium | Titanium alloy | stainless hlau | dawb carbon steel |
| Elastic Modulus/Gpa | 106.3 | 113.2 | 199.9 | 205.8 |
Piv nrog stainless hlau thiab lwm yam ntaub ntawv, titanium alloy muaj tsawg elastic modulus, zoo heev biocompatibility thiab ua formability. Nyob rau hauv xyoo tas los no, nws tau tsim los ua ib qho khoom siv zoo tshaj plaws rau kev cog qoob loo. Nrog rau kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis thiab kev sib sib zog nqus ntawm kev siv tshuaj kho mob, cov cuab yeej siv kho mob tau txhim kho mus rau lub neej ntev, ntau txoj haujlwm, hnav thiab tus nqi qis, yog li titanium alloy yog cov khoom siv zoo tshaj plaws.
1.5 siab cuam tshuam thiab qaug zog kuj
Kev cuam tshuam siab thiab qaug zog tuaj yeem txhim kho cov cuab yeej muaj peev xwm tiv taus cov khoom zoo li qub thiab muaj zog thiab muaj peev xwm tiv taus qhov cuam tshuam ntawm cov dej hiav txwv.
2. Qhov tsis zoo thiab qhov tsis zoo ntawm kev siv titanium thiab titanium alloy
2.1 tsis zoo hnav tsis kam thiab tsis tshua muaj deg hardness ntawm titanium alloy
Rau cov khoom siv nrog cov txheeb ze, qhov tsis zoo hnav tsis kam thiab tsis tshua muaj qhov tawv tawv ntawm titanium alloy tau dhau los ua lub fwj txwv tsis pub siv. Deg hardness thiab hnav tsis kam tuaj yeem txhim kho los ntawm qhov tawv tawv. Xws li thermal txau, plasma nitriding, vapor deposition, ntsev da dej nitriding thiab lwm txoj kev. Piv txwv li, siv txoj kev vapor deposition, txheej thickness ncav cuag 2 ~ 3um, lub hardness yog ntau tshaj 2000hv, thiab nto roughness Ra tsawg dua los yog sib npaug rau 0.8, uas txhim kho hardness thiab hnav tsis kam.
2.2 titanium alloy muaj biocompatibility zoo, thiab cov kab mob kis tau yooj yim
Titanium alloy cov ntaub ntawv muaj biocompatibility zoo, tsis muaj tshuaj lom thiab tsis muaj mob, uas ua rau kom yooj yim txuas cov kab mob ntawm qhov kub thiab txias. Anti adhesion coatings (anticorrosive xim, antifouling xim, thiab lwm yam) tuaj yeem siv. Piv txwv li, lub zog adhesion ntawm cov txheej hauv qab tuaj yeem nce los ntawm 5 ~ 6mpa mus rau ntau tshaj 10MPa tom qab siv cov coatings los tiv thaiv adhesion.
2.3 Muaj peev xwm sib txawv ntawm titanium alloy thiab lwm yam hlau
Thaum titanium alloy txuas nrog rau lwm yam khoom siv, lub ntuj corrosion muaj peev xwm ntawm titanium alloy nyob rau hauv seawater yog siab dua li ntawm tag nrho cov feem ntau siv cov ntaub ntawv, yog li lwm yam ntaub ntawv uas muaj feem xyuam rau corrosion, uas yog ib qho teeb meem yuav tsum tau txiav txim siab nyob rau hauv cov kev xaiv ntawm. titanium alloy Cheebtsam hauv cov qauv offshore. Kev kho rwb thaiv tsev tuaj yeem siv tau, xws li txheej rwb thaiv tsev xim, anodic oxidation, micro arc oxidation lossis vapor deposition txheej. Piv txwv li, micro arc oxidation txoj kev tuaj yeem tsim 10-20mm tuab oxide zaj duab xis thiab txhim kho qhov chaw tiv taus.
