Cov yam ntxwv thiab cov khoom ntawm titanium thiab titanium alloy cov ntaub ntawv

Titanium thiab titanium alloys muaj ntau yam zoo heev, feem ntau xav txog hauv cov hauv qab no:
1. Lub zog muaj zog. Titanium alloy muaj lub zog siab, nws lub zog tensile yog 686-1176MPa, thiab nws qhov ceev tsuas yog li 60% ntawm cov hlau, yog li nws lub zog tshwj xeeb yog siab heev.
2. Siab hardness. Lub hardness HRC ntawm titanium alloy (annealed xeev) yog 32-38.
3. Tsawg elastic modulus. Lub elastic modulus ntawm titanium alloy (annealed xeev) yog 1.078 × 10-1.176 × 10MPa, uas yog ib nrab ntawm cov hlau thiab stainless hlau.
4. Kev ua haujlwm siab thiab qis qis. Ntawm qhov kub thiab txias, titanium alloys tseem tuaj yeem tswj cov khoom siv zoo, lawv cov cua sov ua haujlwm siab dua li ntawm aluminium alloys, thiab lawv qhov kub thiab txias siv dav. Tam sim no, kev ua haujlwm kub ntawm cov hluav taws kub-resistant titanium alloys tuaj yeem ncav cuag 550-600 degree ; ntawm qhov kub thiab txias, lub zog ntawm titanium alloys yog zoo dua piv rau qhov kub thiab txias, thiab lawv muaj zoo toughness. Tsawg-kub titanium alloys tseem tuaj yeem tswj tau zoo toughness ntawm -253 degree .

5. Titanium muaj zog corrosion kuj. Nyob rau hauv huab cua qis dua 550 degree, nyias thiab ntom oxide zaj duab xis yuav sai sai rau ntawm titanium nto. Yog li ntawd, nws cov corrosion kuj nyob rau hauv oxidizing media xws li cua, dej hiav txwv, nitric acid thiab sulfuric acid, muaj zog alkali zoo dua li ntawm feem ntau stainless hlau.
Titanium alloys muaj zog thiab hardness, yog li cov cuab yeej ua haujlwm yuav tsum muaj zog, thiab cov pwm thiab cov cuab yeej txiav yuav tsum muaj lub zog siab thiab tawv. Thaum lub sij hawm txiav, qhov chaw sib cuag ntawm lub nti thiab lub ntsej muag rake yog me me, thiab kev ntxhov siab ntawm cov cuab yeej taub yog loj. Piv nrog 45 steel, txawm hais tias lub zog txiav ntawm titanium alloy tsuas yog 2/3-3/4, qhov chaw sib cuag ntawm cov nti thiab lub ntsej muag rake me dua (tsuas yog 1/2-2/3 ntawm 45 steel. ), yog li cov cuab yeej txiav Cov kev ntxhov siab ntawm cov hniav yog qhov loj, thiab cov cuab yeej tawm los yog txiav ntug yog yooj yim hnav; titanium alloy muaj qhov sib txhuam loj thiab cov thermal conductivity tsawg (tsuas yog 1/4 thiab 1/16 ntawm hlau thiab txhuas feem); kev sib cuag ntawm lub cuab yeej thiab cov nti yog vim nws Nrog lub sijhawm luv luv, txiav cov cua sov yuav sib sau ua ke hauv thaj chaw me me ze rau ntawm ntug txiav thiab yuav tsis yooj yim dissipated. Cov yam tseem ceeb no ua rau kev txiav kub ntawm titanium alloy siab heev, ua rau cov cuab yeej nrawm nrawm thiab cuam tshuam rau kev ua haujlwm zoo. Vim qhov tsis tshua muaj elastic modulus ntawm titanium alloy, lub workpiece rebounds zoo heev thaum txiav, uas tuaj yeem yooj yim ua rau cov cuab yeej flank hnav thiab deformation ntawm lub workpiece. Titanium alloys yog cov tshuaj lom neeg muaj zog heev ntawm qhov kub thiab txias thiab yooj yim hnov ​​​​mob nrog gaseous impurities xws li hydrogen thiab oxygen hauv huab cua. Cov tshuaj tiv thaiv ua rau cov txheej txheem hardened, ntxiv aggravating qhov hnav ntawm lub cuab yeej; Hauv titanium alloy txiav, cov khoom siv ua haujlwm tau yooj yim sib txuas rau lub cuab yeej nto, thiab ua ke nrog kev txiav kub siab, cov cuab yeej ua rau diffusion hnav thiab nplaum hnav.
Titanium alloys muaj cov khoom siv tshuaj lom neeg thiab yooj yim sib haum nrog thiab ua raws li kev sib tsoo ntawm qhov kub thiab txias, txhaws lub log sib tsoo, ua rau muaj zog sib tsoo log hnav, txo kev sib tsoo kev ua tau zoo, thiab nyuaj los xyuas kom meej kev sib tsoo. Kev hnav ntawm lub log sib tsoo kuj ua rau thaj chaw sib cuag ntawm lub log sib tsoo thiab cov khoom ua haujlwm, ua rau cov cua sov dissipation tsis zoo thiab qhov kub thiab txias hauv qhov sib tsoo kom nce siab, ua rau muaj kev kub ntxhov loj ntawm qhov sib tsoo, ua rau kub kub hauv cheeb tsam. ntawm lub workpiece thiab ua rau sib tsoo tawg. Titanium alloy muaj lub zog siab thiab tawv, uas ua rau kev sib tsoo chips nyuaj rau kev sib cais thaum sib tsoo, ua rau muaj zog sib tsoo, thiab ua rau kev sib tsoo fais fab kom haum. Titanium alloy muaj cov thermal conductivity tsawg thiab cov cua sov me me. Thaum tshav kub kub conduction qeeb thaum sib tsoo, ua rau cov cua kub hauv qhov sib tsoo arc cheeb tsam, ua rau qhov kub ntawm qhov sib tsoo cheeb tsam nce sharply. cov

Thaum extruding titanium thiab titanium alloys, siab extrusion kub thiab ceev extrusion ceev yuav tsum tau los tiv thaiv qhov kub ntawm poob sai heev. Nyob rau tib lub sijhawm, lub sijhawm sib cuag ntawm qhov kub-kub dawb paug thiab pwm yuav tsum tau luv luv kom ntau li ntau tau. Yog li ntawd, lub extrusion tuag yuav tsum siv cov ntaub ntawv tshiab kub-resistant tuag, thiab lub conveying ceev ntawm cov dawb paug los ntawm lub cua sov rauv rau lub extrusion chim yuav tsum ceev ceev. Txij li cov hlau tau yooj yim kis los ntawm cov pa thaum lub sij hawm cua sov thiab extrusion, kev tiv thaiv tsim nyog yuav tsum tau ua. Lub lubricants tsim nyog yuav tsum tau xaiv thaum lub sij hawm extrusion los tiv thaiv adhesion rau pwm, xws li lub tsho extrusion thiab iav lubricated extrusion. Vim muaj cov thermal loj ntawm titanium thiab titanium alloy deformation thiab tsis zoo thermal conductivity, tshwj xeeb yuav tsum tau them nyiaj tshwj xeeb rau kev tiv thaiv overheating thaum extrusion thiab deformation. Cov txheej txheem extrusion ntawm titanium alloy yog qhov nyuaj dua li ntawm aluminium alloy, tooj liab alloy thiab txawm hlau. Qhov no yog txiav txim los ntawm lub cev tshwj xeeb thiab tshuaj lom neeg ntawm titanium alloy. Thaum cov pa kub rov qab extrusion ntawm titanium alloy, qhov tuag kub yog tsawg, qhov kub thiab txias ntawm lub billet nyob rau hauv kev sib cuag nrog cov tuag poob sai sai, thaum kub nyob rau hauv lub billet nce vim deformation tshav kub. Vim tias cov thermal conductivity tsawg ntawm titanium alloy, tom qab qhov kub thiab txias poob, cov cua sov ntawm lub puab tsaig tsis tuaj yeem hloov mus rau qhov chaw nyob rau lub sijhawm kom rov ua dua nws, thiab txheej txheej tawv tawv yuav tshwm sim, ua rau nws nyuaj rau kev deformation. Nyob rau tib lub sijhawm, qhov kub thiab txias gradient yuav tshwm sim ntawm txheej txheej thiab txheej sab hauv. Txawm hais tias nws tuaj yeem tsim tau, nws yooj yim ua rau deformation thiab cov qauv tsis sib xws.
Titanium alloys yog rhiab heev rau forging txheej txheem tsis. Kev hloov pauv ntawm qhov kub thiab txias, deformation tus nqi, deformation tus nqi thiab qhov txias txias yuav ua rau muaj kev hloov pauv ntawm cov qauv thiab cov khoom ntawm titanium alloys. Txhawm rau kom tswj tau cov qauv zoo ntawm forgings, nyob rau hauv xyoo tas los no, cov thev naus laus zis thev naus laus zis xws li kub tuag forging thiab isothermal forging tau dav siv hauv kev tsim cov titanium alloys.

Lub plasticity ntawm titanium alloys nce nrog kub. Nyob rau hauv qhov kub thiab txias ntawm 1000-1200 degree, lub plasticity ncav cuag tus nqi siab tshaj plaws, thiab qhov tso cai deformation degree nce mus txog 70% -80%. Lub forging kub ntau yam ntawm titanium alloys yog nqaim thiab yuav tsum nruj me ntsis tswj raws li lub ( ) / transformation kub (tshwj tsis yog rau ingot opens), txwv tsis pub cov nplej yuav loj hlob hnyav thiab txo cov chav tsev kub plasticity; titanium alloys feem ntau yog nyob nruab nrab ntawm ( ) Forging yog ua nyob rau hauv lub theem cheeb tsam vim hais tias lub forging kub saum lub ( ) / transformation kab yog siab dhau lawm, uas yuav ua rau lub tiam ntawm brittle theem. Ob qho tib si thawj zaug forging thiab zaum kawg forging ntawm titanium alloy yuav tsum siab tshaj qhov ( ) / transformation kub. Lub deformation tsis kam ntawm titanium alloy nce sai nrog qhov nce ntawm deformation ceev, ntawm cov forging kub muaj ntau dua cuam tshuam rau deformation kuj ntawm titanium alloy. Yog li ntawd, pa forging yuav tsum tau ua nyob rau hauv lub forging tuag nrog tsawg cua txias. Cov ntsiab lus ntawm cov ntsiab lus interstitial (xws li O, N, C) kuj tseem muaj kev cuam tshuam loj rau kev tsim cov titanium alloys.