1. Txiav kev ua haujlwm
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 cov chips thiab rake lub ntsej muag 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 Cov kev ntxhov siab ntawm cov ntug txiav yog ntau dua, thiab cov taub los yog txiav ntug yog nquag 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 cov cuab yeej thiab cov nti Vim nws qhov ntev ntev, txiav cov cua sov hauv ib qho chaw me me ze ntawm ntug txiav thiab tsis yooj yim dissipated. Cov yam ntxwv 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 alloys, 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 ua haujlwm ntawm qhov kub thiab txias thiab muaj kev cuam tshuam nrog cov pa impurities xws li hydrogen thiab oxygen hauv huab cua. Cov tshuaj tiv thaiv tsim ib txheej hardened thiab ntxiv aggravates lub hnav ntawm lub cuab tam; 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.
2. Kev sib tsoo ua haujlwm
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 kev sib tsoo ntawm lub log, txo kev sib tsoo, thiab nyuaj rau kev ua kom muaj kev sib tsoo raug. Kev hnav ntawm lub log sib tsoo kuj ua rau thaj chaw sib txuas ntawm lub log sib tsoo thiab lub tshuab ua haujlwm, ua rau cov cua sov dissipation tsis zoo, qhov kub thiab txias hauv qhov sib tsoo nce siab, thiab thermal stress yog tsim los ntawm cov txheej txheem sib tsoo, ua rau hauv zos hlawv ntawm lub workpiece thiab ua rau sib tsoo tawg. Titanium alloy muaj lub zog siab thiab tawv, uas ua rau nws nyuaj rau kev sib tsoo chips kom sib cais thaum sib tsoo, ua rau kom muaj zog sib tsoo, thiab ua rau kev sib tsoo fais fab kom haum. Titanium alloy muaj thermal conductivity tsawg, me me tshwj xeeb cua sov, thiab qeeb cua sov conduction thaum lub sij hawm sib tsoo, ua rau tshav kub mus rau hauv lub sib tsoo arc cheeb tsam, ua rau lub kub ntawm lub sib tsoo cheeb tsam nce sharply.
3. Extrusion kev ua tau zoo
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 sij hawm, lub sij hawm sib cuag ntawm lub high-kub billet thiab pwm yuav tsum luv luv kom ntau li ntau tau. Yog li ntawd, cov ntaub ntawv tshiab los tiv thaiv pwm yuav tsum tau siv rau cov extrusion tuag, thiab kev thauj mus los ceev ntawm lub billet los ntawm lub qhov cub cua sov mus rau lub extrusion chim yuav tsum ceev ceev. Txij li cov hlau tau yooj yim kis los ntawm cov pa roj thaum cua sov thiab extrusion, kev tiv thaiv tsim nyog yuav tsum tau ua. Cov lubricants uas tsim nyog yuav tsum tau xaiv thaum lub sij hawm extrusion los tiv thaiv cov pwm, xws li lub tsho extrusion thiab iav lubricated extrusion. Vim tias titanium thiab titanium alloys muaj cov thermal loj ntawm 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, uas 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 alloys, qhov tuag kub yog tsawg, qhov kub thiab txias ntawm lub billet nyob rau hauv kev sib cuag nrog cov tuag poob sai sai, thiab kub nyob rau hauv lub billet nce vim deformation tshav kub. Vim tias tsis tshua muaj thermal conductivity ntawm titanium alloy, tom qab qhov kub thiab txias poob, cov cua sov ntawm lub puab tsis tuaj yeem hloov mus rau qhov chaw nyob rau lub sijhawm ntxiv, thiab cov txheej txheej tawv tawv yuav tshwm sim, ua rau nws nyuaj rau txuas ntxiv 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 yuav yooj yim ua rau deformation thiab cov qauv tsis sib xws.
4. Forging kev ua tau zoo
Titanium alloys yog rhiab heev rau forging txheej txheem tsis. Kev hloov pauv ntawm qhov kub thiab txias, deformation tus nqi, deformation thiab txias tus nqi yuav ua rau muaj kev hloov pauv hauv 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 alloy 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 qhib), txwv tsis pub cov nplej yuav loj hlob hnyav thiab txo lub chav tsev kub plasticity; titanium alloys feem ntau yog nyob rau hauv (+) ob-theem cheeb tsam forging, vim hais tias lub forging kub saum lub (+) / theem transformation kab yog siab dhau lawm, nws yuav ua rau lub nkig theem, thiab thawj forging thiab zaum kawg forging ntawm titanium alloy yuav tsum. siab dua (+) / hloov pauv kub. Lub deformation tsis kam ntawm titanium alloys nce sai nrog qhov nce ntawm deformation ceev, thiab qhov kub ntawm forging muaj kev cuam tshuam ntau dua rau qhov deformation tsis kam ntawm titanium alloys. Yog li ntawd, pa forging yuav tsum tau ua kom tiav nrog tsawg kawg nkaus txias nyob rau hauv lub forging tuag. Cov ntsiab lus ntawm cov ntsiab lus interstitial (xws li O, N, C) kuj muaj kev cuam tshuam loj heev rau kev tsim cov titanium alloys.
