Titanium alloysnthuav tawm cov khoom sib txawv raws li lawv qhov muaj pes tsawg leeg thiab cov qauv. Titanium muaj ob lub qauv siv lead ua: -titanium, nrog hexagonal lattice hauv qab 882 degree, thiab -titanium, nrog lub cev-centered cubic qauv saum toj 882 degree. Los ntawm kev ntxiv cov ntsiab lus alloying tsim nyog, cov ntsiab lus theem thiab kev hloov pauv kub tuaj yeem hloov kho kom tau txais ntau hom titanium alloy. Nyob rau hauv chav tsev kub, titanium alloys tau muab faib ua peb pawg.
1. Titanium alloy: Qhov no ib-theem alloy muaj -phase khoom tov. Nws tuav nws cov qauv-theem ntawm ob qho tib si qhov kub thiab txias. Lub titanium alloy nthuav tawm lub koom haum ruaj khov, qis hnav tsis kam piv rau cov ntshiab titanium, thiab zoo heev oxidation kuj. Txawm hais tias nws khaws nws lub zog thiab nkag siab ntawm 500-600 degree, nws tsis tuaj yeem muaj zog los ntawm kev kho cua sov. Chav tsev kub lub zog ntawm titanium alloy tsis yog tshwj xeeb.
2. Tom ntej: Beta Titanium Alloy: Qhov no ib-theem alloy yog tsim los ntawm -phase khoom tov. Nws muaj lub zog siab txawm tias tsis muaj kev kho cua sov. Tsis tas li ntawd, cov hlau tuaj yeem ntxiv dag zog ntxiv los ntawm cov txheej txheem xws li quenching thiab aging. Lub zog tensile ntawm beta titanium alloy ntawm chav tsev kub tuaj yeem ncav cuag 1372-1666 MPa.
3. Alpha-Beta Titanium Alloy: Qhov no duplex alloy exhibits tag nrho cov kev ua tau zoo, nrog rau cov koom haum zoo stability, toughness, plasticity, thiab high-temperature deformation zog. Nws yog qhov zoo rau kev ua haujlwm kub siab, quenching, thiab kev laus los txhim kho nws lub zog. Lub tshav kub-kho alpha-beta titanium alloy ua kom pom qhov nce ntawm 50-100% piv rau lub xeev annealed. Nws tuaj yeem tiv taus lub sijhawm ua haujlwm ntev ntawm qhov kub ntawm 400-500 degree thiab nthuav tawm thermal stability, thib ob tsuas yog alpha titanium alloy.
Ntawm peb hom titanium alloys, feem ntau siv yog titanium alloy thiab alpha-beta titanium alloy. Hais txog machinability, titanium alloy muaj kev ua tau zoo dua, ua raws li alpha-beta titanium alloy, thaum beta titanium alloy lags tom qab. Cov lej sib raug rau cov hlau no yog TA rau titanium alloy, TB rau beta titanium alloy, thiab TC rau alpha-beta titanium alloy.
Kev ua tau zoo ntawm Titanium Alloys:
1. Lub zog muaj zog: Titanium alloys muaj qhov ntom ntom ntawm kwv yees li 4.51 g / cm³, uas tsuas yog 60% ntawm cov hlau. Qee lub zog titanium alloys muaj zog tshaj lub zog ntawm ntau cov qauv hlau alloy. Yog li ntawd, lub zog tshwj xeeb (lub zog / ntom) ntawm titanium alloys tshaj li ntawm lwm cov khoom siv hlau. Cov alloys no zoo tagnrho rau kev tsim cov khoom sib sib zog nqus nrog lub zog siab thiab nruj, xws li cov khoom siv dav hlau, cov pob txha, tawv, fasteners, thiab tsaws iav.
2. Siab Thermal Strength: Titanium alloys tuaj yeem tiv taus qhov kub thiab txias dua piv rau aluminium alloys. Lawv tuaj yeem tuav lawv lub zog uas yuav tsum tau muaj txawm tias nyob rau nruab nrab qhov kub thiab muaj zog tshwj xeeb ntawm 150-500 degree . Hauv qhov sib piv, aluminium alloys muaj kev txo qis zog ntawm 150 degree. Kev ua haujlwm kub ntawm titanium alloys txuas mus txog 500 degree, thaum aluminium alloys txwv rau qhov kub hauv qab 200 degree.
3. Zoo heev Corrosion Resistance: Titanium alloys muaj superior corrosion kuj nyob rau hauv cov huab cua thiab dej hiav txwv, outperforming stainless hlau. Lawv muaj kev tiv thaiv zoo rau pitting corrosion, acid corrosion, thiab kev nyuaj siab corrosion. Titanium alloys kuj qhia tau zoo heev tiv thaiv alkalis, chlorides, chlorine organic tshuaj, nitric acid, sulfuric acid, thiab lwm yam. Txawm li cas los xij, lawv muaj kev tiv thaiv corrosion tsis zoo los txo qhov chaw uas muaj oxygen thiab chromium ntsev.
4. Kev Ua Haujlwm Kub Kub Zoo: Titanium alloys tswj lawv cov khoom siv kho tshuab txawm tias qhov kub thiab txias qis. Vim lawv cov thermal expansion coefficient tsawg, qee cov titanium alloys, xws li TA7, khaws cov qib plasticity txawm nyob rau ntawm -253 degree . Yog li, titanium alloys yog cov khoom siv tseem ceeb rau kev siv qis-kub.
5. Cov Kev Ua Si Tseem Ceeb: Titanium nthuav tawm cov tshuaj lom neeg muaj zog, ua rau muaj kev cuam tshuam nrog cov ntsiab lus zoo li oxygen, nitrogen, hydrogen, carbon monoxide, carbon dioxide, dej vapor, thiab ammonia. Piv txwv li, thaum cov ntsiab lus carbon ntau tshaj 0.2%, tawv titanium carbides (TiC) daim ntawv nyob rau hauv lub alloy. Ib yam li ntawd, ntawm qhov kub siab dua, cov tshuaj tiv thaiv nrog nitrogen ua rau tsim cov tawv titanium nitride (TiN) txheej txheej. titanium tau yooj yim absorbs oxygen siab tshaj 600 degree, uas ua rau cov txheej txheem hardened. Tsis tas li ntawd, cov ntsiab lus hydrogen ntau ntxiv tuaj yeem ua rau kev txhim kho ntawm cov txheej txheem nkig. Cov tshuaj tiv thaiv no tuaj yeem ua rau adhesion tshwm sim nrog kev sib txhuam ntawm qhov chaw.
6. Tsawg Thermal Conductivity thiab Elasticity: Titanium muaj cov thermal conductivity tsawg (kwv yees 15.24 W / (m·K)). Nws cov thermal conductivity yog li 1/4 ntawm nickel, 1/5 ntawm hlau, thiab 1/14 ntawm txhuas. Titanium alloys nthuav tawm txawm tias qis dua thermal conductivity piv rau titanium ntshiab.
Hu rau:
Yog tias koj muaj lus nug, thov koj xav tiv tauj peb. Cov sijhawm ua haujlwm: 8:30 teev sawv ntxov txog 17:30 teev tsaus ntuj
E-mail:zhangjixia@bjygti.com
