Kev lag luam Pure Qib 1 thiab Qib 2 Titanium vs Qib 5 Ti-6Al-4V: Qhov Tseem Ceeb Qhov txawv
Nov 24, 2025
Titanium muab nkag rau hauv tsev neeg ntawm cov qhab nia, thiab qhov sib txawv ntawm lawv txiav txim siab seb cov khoom tiav ua haujlwm li cas thaum nws ua haujlwm. Peb qib feem ntau piv rau cov kev ntsuam xyuas tshwj xeeb yog Qib 1 thiab Qib 2 kev lag luam ntshiab (CP) titanium thiab Qib 5, Ti-6Al-4V alloy. Tag nrho peb cov tiv thaiv chloride-cov kabmob dej thiab oxidising media zoo dua li cov pa roj carbon steel lossis stainless hlau, tab sis lawv txawv ntawm purity, alloy cov ntsiab lus, lub zog, formability thiab nqi. Sib piv cov qib mus rau lub luag haujlwm, es tsis txhob defaulting rau qhov kev xaiv muaj zog tshaj plaws, yog dab tsi ua rau cov cuab yeej siv siab, cov khoom siv hluav taws xob sib txawv thiab cov qauv tsim muaj kev nyab xeeb thiab kev lag luam tib lub sijhawm.
Chemical Composition ntawm ib nrais muag
Kev lag luam qib ntshiab yog unalloyed titanium tuav nyob rau hauv nruj txwv ntawm interstitial ntsiab, thaum Qib 5 ntxiv txhuas thiab vanadium raws li txhob txwm alloying ntxiv. Cov lus hauv qab no qhia txog cov kev txwv uas cais peb qib.
| Element | Qib 1 (UNS R50250) | Qib 2 (UNS R50400) | Qib 5 (UNS R56400) |
|---|---|---|---|
| Oxygen, max% | 0.18 | 0.25 | 0.20 |
| Hlau, max% | 0.20 | 0.30 | 0.30 |
| Nitrogen, max% | 0.03 | 0.03 | 0.05 |
| Cov pa roj carbon, max% | 0.08 | 0.08 | 0.08 |
| Hydrogen, max% | 0.015 | 0.015 | 0.015 |
| Aluminium % | tsis muaj | tsis muaj | 5.50-6.75 Nws |
| Vanadium% | tsis muaj | tsis muaj | 3.50-4.50 Nws |
| Titanium | Tshuav | Tshuav | Tshuav |
Oxygen yog ib qho tseem ceeb tshaj plaws interstitial keeb nyob rau hauv cov qib ntshiab kev lag luam: nws tsa lub zog thaum txo cov ductility. Tias yog vim li cas Qib 1 thiab Qib 2 sib txawv hauv cov ntsiab lus ntawm cov pa oxygen ntau dua li cov khoom sib ntxiv.
Mechanical Properties muab piv
| Khoom | Qib 1 | Qib 2 | Qib 5 |
|---|---|---|---|
| Tensile zog, min | 240 MPa | 345 MPa rau | 895mpa ua |
| Yield zog (0.2% offset), min | 138 MPa rau | 275 MPa rau | 828MPa ua |
| Elongation, min | 24 % | 20 % | 10 % |
| Txo thaj tsam, min | 30 % | 30 % | 25 % |
| Qhov ntom | 4.51 g / cm3 | 4.51 g / cm3 | 4.43 g / cm3 |
| Elastic modulus, yam | txog 103 GPa | txog 103 GPa | txog 114 GPa |
| Kev siv qhov kub thiab txias | mus txog 300 C | mus txog 300 C | mus txog 400 C |
Qib 5 muab kwv yees li peb npaug ntawm cov khoom muaj zog ntawm Qib 2 thaum tseem tshuav li 40% sib zog dua li qhov sib npaug ntawm cov hlau, uas yog vim li cas nws thiaj li dominates aerospace thiab siab -kev ua haujlwm engineering. Qib 1 thiab Qib 2 raug xaiv los ntawm qhov chaw yuav tsum tau tsim, khoov, nthuav dav lossis welded feem ntau thiab qhov chaw ua haujlwm nruab nrab.
Corrosion Resistance, Formability thiab Weldability
Oxidising thiab neutral chloride media:Qib 1 thiab Qib 2 tsim cov yeeb yaj kiab oxide ruaj khov thiab yog qhov kev xaiv zoo tshaj plaws hauv dej hiav txwv, brine, hypochlorite thiab ntub dej chlorine.
Qib 5 hauv corrosive luag hauj lwm:kev ua tau zoo yog nyob ze rau cov qib ntshiab kev lag luam nyob rau hauv feem ntau ib puag ncig, tab sis cov alloying ntxiv txo ductility thiab me ntsis txo qhov tsis kam ntawm qee qhov kev tawm tsam hnyav.
Kub txo acids:qhov twg CP titanium raug tawm tsam, molybdenum-cov kabmob Qib 12 lossis palladium- cov qhab nia ruaj khov tau teev tseg tsis yog Qib 5.
Formability:Qib 1 yog feem ntau formable thiab weldable, ua raws li Qib 2. Qib 5 yuav tsum muaj kev sib sau ntau zog, nruj tswj lub springback thiab kev ntxhov siab tom qab vuam.
Fabrication cwj pwm:tag nrho peb qib ua cov cua sov tsis zoo, yog li kev txiav qis qis, cov dej txias dav dav thiab cov cuab yeej ntse yuav tsum tau ua kom tsis txhob ua hauj lwm tawv thiab galling.
Cov ntawv thov kev lag luam
Qib 1:Cov txheej txheem tshuaj lom neeg cov hlab ntsha, cov raj xa hluav taws xob, cov kav dej hiav txwv, cov nroj tsuag desalination, electroplating racks thiab anodes.
Qib 2:qhov dav - hom phiaj CP qib rau cov hlab ntsha siab, lub tank cia, raj thiab yeeb nkab, flanges, fittings thiab condenser tubing. Nws yog qib titanium ntau tshaj plaws hauv kev lag luam.
Qib 5:aerospace structural qhov chaw, tsaws iav Cheebtsam, engine hardware, phais implants, siab -siab hydraulic fittings, subsea khoom thiab siab -load fasteners.
Qib 5 ELI (ASTM F136):qhov ntxiv -qis-interstitial variant, siv qhov twg pob txha toughness thiab qaug zog lub neej teeb meem, xws li implants thiab tseem ceeb forgings.
Kev taw qhia kev xaiv rau Project Engineers
Pib nrog ib puag ncig es tsis yog lub zog daim duab. Yog hais tias qhov nruab nrab yog seawater, brine, hypochlorite los yog cov chlorine ntub dej thiab cov khoom siv yog tsim los yog welded, Qib 2 feem ntau txaus siab rau lub luag haujlwm ntawm tus nqi qis tshaj, nrog Qib 1 tshwj tseg rau kev sib sib zog nqus loj xws li sib sib zog nqus- kos lossis nthuav lub raj. Yog tias cov khoom siv thauj khoom siab, pom qhov kub siab lossis yuav tsum txuag qhov hnyav, Qib 5 yog qhov tsim nyog xaiv thiab fabrication yuav tsum tau npaj nyob ib ncig ntawm nws cov ductility, nrog rau tag nrho argon shielding, tsim nyog vuam cov txheej txheem thiab post-weld stress relief. Qhov nruab nrab yog kub txo cov kua qaub, tsis yog Qib 2 lossis Qib 5 tsis txaus thiab molybdenum{10}} qib bearing yuav tsum raug ntsuas. Cov ntaub ntawv qib, kev tswj hwm tus qauv thiab cov xwm txheej ntawm kev yuav khoom tshwj xeeb, vim tias cov khoom xws li lub zog qis kawg nkaus tau lees paub los ntawm cov khoom siv tus qauv es tsis yog los ntawm daim ntawv pov thawj zeb ib leeg.
Cov lus nug nquag
Q: Dab tsi yog qhov txawv ntawm Qib 1 thiab Qib 2 titanium?
Ob leeg yog unalloyed coj mus muag ntshiab titanium. Qib 1 yog txwv rau 0.18% oxygen thiab Qib 2 txog 0.25% oxygen, yog li Qib 1 yog softer, ductile ntau dua thiab yooj yim rau kev tsim, thaum Qib 2 muaj zog dua nrog me ntsis elongation. Qib 2 yog qhov kev xaiv ntau tshaj plaws hauv kev lag luam.
Q: Puas yog Qib 5 titanium li corrosion resistant li Qib 2?
Nyob rau hauv dej hiav txwv, brine thiab feem ntau oxidising media ob tus cwj pwm zoo ib yam, thiab cov zaj duab xis passive tiv thaiv Qib 5 ib yam nkaus. Nyob rau hauv kub txo cov kua qaub cov qib ntshiab kev lag luam twb tsis tsim nyog, thiab molybdenum - qib bearing xws li Qib 12 yuav tsum tau siv rau ob daim ntawv thov.
Q: Peb qib puas tuaj yeem txuas rau ib leeg?
Yog lawm. Qib 1, Qib 2 thiab Qib 5 yog tag nrho cov alpha lossis alpha-beta titanium alloys thiab tuaj yeem koom nrog cov khoom sib txuam xws li ERTi-1, ERTi-2 thiab ERTi-5, yog tias qhov sib koom ua ke yog tiv thaiv los ntawm argon ntawm ob lub ntsej muag thiab cov txheej txheem tsim nyog. Dissimilar pob qij txha yuav tsum tsim nyog nyias vim hais tias cov weld pas dej ua ke chemistry txawv ntawm ob niam txiv hlau.
Q: Qib twg yuav tsum tau siv rau cov kav dej hiav txwv?
Qib 2 yog tus qauv xaiv rau cov kav dej hiav txwv, fittings thiab condenser raj. Qib 1 yog siv rau qhov twg lub raj tau nthuav dav lossis khoov hnyav, thiab Qib 5 tsuas yog qhov twg cov khoom siv hluav taws xob siab lossis siab siab txiav txim siab cov qib ntshiab hauv kev lag luam.
Q: Qhov kub npaum li cas tuaj yeem siv rau txhua qib?
Kev lag luam qib ntshiab yog ib txwm txwv rau li 300 C hauv kev pabcuam txuas ntxiv vim lub zog poob thiab oxidation nrawm dua li qib ntawd. Qib 5 khaws cia muaj zog muaj zog txog li 400 C, thiab qhov ntxiv - qis- sib txawv sib txawv ua lag luam me me ntawm lub zog rau kev txhim kho toughness.
Q: Cov qauv twg them rau cov qib no?
ASTM B265 npog phaj, ntawv thiab sawb, ASTM B338 npog seamless thiab welded raj, ASTM B348 npog bar thiab billet, ASTM B381 npog forgings, thiab ASTM F136 npog qhov ntxiv - qis -interstitial Qib 5 kev kho mob qib. Sib npaug ASME SB tus lej thov rau cov khoom siv siab.
