Yuav Ua Li Cas Titanium Alloy Phaj Ua: Kauj Ruam - los ntawm - Cov Txheej Txheem
Nov 13, 2024
Los ntawm daim txhuam cev mus rau phaj: Ib qho kev nthuav dav
Titanium alloy phaj ntau lawm yog ntau- cov txheej txheem nyob rau hauv uas txhua kauj ruam txiav txim qhov kawg microstructure, txhua yam khoom thiab nto zoo. Txoj kev khiav ntawm raw khoom npaj los ntawm melting, casting, forging, dov, kho cua sov, deg txias thiab tshuaj xyuas. Kab lus no piav qhia txhua theem nrog cov tsis muaj teeb meem rau cov engineers uas qhia lossis yuav titanium phaj.
1. Kev npaj cov khoom nyoos
Cov txheej txheem pib nrog titanium daim txhuam cev, xaiv los ntawm qib purity, thiab ntxiv alloying xws li txhuas-vanadium master alloy, molybdenum lossis npib tsib xee. Cov tshuaj lom neeg muaj pes tsawg leeg thiab cov ntsiab lus impurity ntawm tus nqi yuav tsum tau tswj nyob rau hauv nruj txwv vim hais tias cov ntsiab lus xws li oxygen, nitrogen thiab hydrogen muaj zog rau lub zog thiab ductility. Cov khoom siv raw khoom yog nias rau hauv electrodes, uas tom qab ntawd welded ua ke los tsim cov khoom siv hluav taws xob rau melting.
2. Ua kua
Melting yog nqa tawm nyob rau hauv lub tshuab nqus tsev los tiv thaiv oxidation thiab gas pickup. Nqus arc remelting (VAR) yog txoj kev txheem; siab - qib kev ncaj ncees yog ob npaug - los yog triple -kua los txhim kho homogeneity thiab tshem tawm cov impurities volatile. Lub ingot tsim yog ib tug chemically uniform, tuab lub tog raj kheej, feem ntau yog los ntawm 500 mm mus rau ntau tshaj 1000 mm nyob rau hauv lub cheeb nyob ntawm seb lub khw muag khoom.
3. Forging
Lub ingot yog thawj zaug kub-forged rau ntawm qhov qhib- tuag nias kom tawg cov qauv nrum. Qhov pib tawg yog ua tiav zoo tshaj qhov beta transus (feem ntau yog 1150-1200℃rau ntau alpha-beta alloys), tom qab ntawd los ntawm kev ua haujlwm hauv alpha-beta teb ntawm qhov kub thiab txias los ua kom cov nplej. Forging converts lub ingot mus rau hauv ib tug slab ntawm qhov yuav tsum tau dav thiab thickness, tshem tawm casting porosity thiab kaw nyob rau hauv tsis xws luag.
4. Rolling
Cov slab yog kub- dov rau ntawm lub phaj zeb hauv ntau qhov kev hla, nrog rau qhov kub thiab txias tswj txheeb ze rau beta transus ntawm qib. Piv txwv li, Ti-6Al-4V (Qib 5) feem ntau yog dov nyob rau hauv alpha-beta teb nyob ib ncig ntawm 950℃tom qab pib tawg, thaum lub lag luam qib ntshiab yog dov nyob rau hauv qis kub. Intermediate annealing ntawm passes restores workability. Qhov tshwm sim yog lub phaj nrog cov tuab tuab, flatness thiab tswj microstructure.
5. Kev kho cua sov
Kev kho cua sov yog siv los teeb tsa cov khoom kawg. Annealing tshem tawm cov kev ntxhov siab uas seem thiab softens cov khoom: CP qib yog annealed nyob ib ncig ntawm 650-760 degree, Qib 5 nyob ib ncig ntawm 700-790 degree. Rau alpha-beta alloys, kev kho kev daws teeb meem thiab kev laus tuaj yeem txhawb nqa lub zog loj tab sis txo qis, yog li kev npau taws raug xaiv kom haum rau daim ntawv thov. Cua sov tus nqi, tuav lub sij hawm thiab txias tus nqi yog tag nrho cov tswj.
6. Kev kho qhov chaw thiab ua tiav
Tom qab dov, lub phaj yog descaled los ntawm kev sib tsoo los yog pickling, thiab deg defects raug tshem tawm los ntawm lub zos sib tsoo. Nyob ntawm qhov kev qhia tshwj xeeb, lub phaj yuav txias - dov kom zoo dua qhov chaw thiab tiaj tus, theem, txiav kom loj, thiab muab cov khoom noj, blasted, polished lossis machined nto. Dimensional kam rau ua raws li ASTM B265 lossis GB / T 3621.
7. Kev tshuaj xyuas thiab ntawv pov thawj
Cov phaj kawg raug kuaj rau tshuaj muaj pes tsawg leeg, tensile zog, hardness thiab, qhov twg yuav tsum tau, ultrasonic soundness. Mill daim ntawv pov thawj rau EN 10204 3.1 sau cov txiaj ntsig. Aerospace qib yuav xav tau kev sim ntxiv rau AMS 4911 lossis cov neeg siv khoom tshwj xeeb.
FAQ
Vim li cas titanium melted hauv lub tshuab nqus tsev?
Molten titanium reacts sai nrog oxygen, nitrogen thiab hydrogen nyob rau hauv huab cua, uas yuav embrittle cov hlau thiab tsim inclusions. Lub tshuab nqus tsev arc remelting tshem tawm cov khoom no thiab tseem tshem tawm cov impurities tsis haum, muab qhov huv si, homogeneous ingot.
Dab tsi yog qhov txawv ntawm daim ntawv thiab phaj?
Raws li ASTM B265, daim ntawv yog cov khoom siv tsawg dua 4.75 hli (0.187 hauv) tuab, thiab phaj yog 4.75 hli thiab tuab dua. Ob leeg yog them los ntawm tib tus qauv tab sis dov thiab flattening kev coj txawv.
Dab tsi yog qib titanium ntau tshaj rau phaj?
Kev lag luam ntshiab qib Gr1-Gr4, Ti-6Al-4V (Gr5), Gr7, Gr9, Gr12 thiab Gr23 (Ti-6Al-4V ELI) npog feem ntau ntawm kev lag luam, los ntawm cov nroj tsuag tshuaj mus rau aerospace qauv.
Vim li cas annealing xav tau tom qab dov?
Rolling ua hauj lwm- hardens cov khoom thiab tawm qhov seem seem. Annealing recrystallizes lub deformed qauv, restores ductility thiab stabilizes cov khoom yuav tsum tau los ntawm cov specification.
Cov phaj zoo li cas thiaj paub tseeb?
Kev tshuaj ntsuam xyuas tshuaj pom zoo muaj pes tsawg leeg, kev ntsuas tensile thiab hardness paub meej tias cov khoom siv kho tshuab, thiab kev kuaj ultrasonic kuaj pom cov teeb meem sab hauv xws li voids thiab inclusions. Daim ntawv pov thawj yog muab rau EN 10204 3.1.
Cov phaj puas tuaj yeem muab tau nrog qhov tshwj xeeb nto tiav?
Yog lawm. Pickled, blasted, av, polished thiab machined nto yog muaj; qhov tiav yog xaiv raws li kev txhim kho corrosion, vuam lossis cov khoom siv kom zoo nkauj ntawm daim ntawv thov.
