Kev cuam tshuam ntawm Forging txheej txheem ntawm Microstructure thiab Properties ntawm Titanium Bars
Qib 5 titanium barforging cov ntaub ntawv yog cov ntshiab titanium thiab titanium alloys nrog ntau yam khoom. Thawj lub xeev ntawm cov khoom muaj xws li titanium rods, ingots, hlau hmoov thiab kua hlau. Qhov sib piv ntawm qhov sib npaug ntawm qhov chaw ntawm cov hlau ua ntej deformation mus rau qhov chaw hla ntu tom qab deformation yog hu ua forging ratio. Kev xaiv kom raug ntawm forging piv, tsim nyog ntsuas kub thiab tuav lub sij hawm, tsim nyog pib forging kub thiab zaum kawg forging kub, tsim nyog tus nqi deformation thiab deformation ceev muaj kev sib raug zoo nrog kev txhim kho cov khoom zoo thiab txo tus nqi. Feem ntau, puag ncig lossis square bar yog siv los ua qhov khoob rau me me thiab nruab nrab-qhov loj me forgings. Cov qauv ntawm cov nplej thiab cov khoom siv kho tshuab ntawm lub bar yog qhov sib xws thiab zoo, cov duab thiab qhov loj me yog qhov tseeb, qhov zoo ntawm qhov chaw yog qhov zoo, thiab nws yooj yim los npaj cov khoom loj. Ntev npaum li cov cua kub thiab deformation tej yam kev mob raug tswj kom tsim nyog, forgings nrog kev ua tau zoo heev tuaj yeem forged yam tsis muaj forging loj deformation. Nyob rau hauv dav hlau, titanium alloys feem ntau yog siv los tsim cov khoom tseem ceeb xws li girders, tsaws iav, kiv cua hubs thiab pob qij txha; ntawm lub cav, titanium alloys feem ntau yog siv los tsim lub nplhaib adapter, lub log kiv cua, compressor discs thiab hniav, thiab lwm yam.
Titanium alloys yog rhiab heev rau forging txheej txheem tsis. Kev hloov pauv hauv forging kub, deformation, deformation thiab txias tus nqi yuav ua rau kev hloov hauv microstructure thiab cov khoom ntawm titanium alloys. Txhawm rau kom tswj tau qhov microstructure zoo dua thiab cov khoom ntawm forgings, cov txheej txheem forging siab heev xws li kub tuag forging thiab isothermal forging tau siv dav hauv kev tsim cov titanium alloys hauv xyoo tas los no. Siv cov txheej txheem forging, feem ntau hais lus, titanium alloys tuaj yeem tau txais cov qauv equiaxed tom qab forging, kom lawv muaj chav tsev kub thiab lub zog. Nws muab txoj hauv kev ua tau los daws qhov tsim ntawm qhov loj thiab nyuaj precision forgings ntawm titanium rods. Txoj kev no tau siv dav hauv kev tsim cov titanium rods. Ib txoj hauv kev zoo tshaj plaws los txhim kho cov dej ntws ntawm titanium rods thiab txo cov deformation kuj yog ua kom cov pwm ua ntej kub. Isothermal tuag forging thiab kub tuag forging tau tsim nyob rau hauv 20 lossis 30 xyoo dhau los hauv tsev thiab txawv teb chaws.
Yuav ua li cas txhim kho cov txiaj ntsig ntawm Qib 5 titanium bar, ntawm lawv, txoj kev kaw tuag forging tuaj yeem siv los ua cov titanium tuav. Lub kaw tuag forging yuav tsum nruj me ntsis txwv qhov ntim ntawm cov khoom qub, uas ua rau cov txheej txheem npaj cov khoom nyuaj. Seb puas siv kaw tuag forging yuav tsum tau txiav txim siab los ntawm ob yam ntawm cov txiaj ntsig thiab cov txheej txheem ua tau. Kev kho cua sov tom qab thiab machining ntawm qhov kawg nkaus xwb. Lub forging kub thiab degree ntawm deformation yog cov yam tseem ceeb uas txiav txim siab cov qauv thiab cov khoom ntawm cov hlau. Kev kho cua sov ntawm titanium rods yog txawv ntawm cov hlau, thiab tuag forging feem ntau yog siv los tsim cov duab thiab qhov ntau thiab tsawg ze rau cov khoom seem. Nws tsis ua lub luag haujlwm txiav txim siab hauv cov qauv ntawm cov alloy. Yog li ntawd, cov txheej txheem tshwj xeeb ntawm cov kauj ruam kawg ntawm titanium pas nrig muaj lub luag haujlwm tseem ceeb tshwj xeeb. Nws yog ib qho tsim nyog yuav tsum ua kom tag nrho cov deformation ntawm qhov khoob tsis pub tsawg tshaj 30%, thiab qhov kub deformation tsis tshaj qhov kub hloov pauv theem. Txhawm rau kom tau txais lub zog siab thiab plasticity tib lub sijhawm, qhov kub thiab deformation yuav tsum tau muab faib ua tusyees li sai tau thoob plaws hauv qhov deformed dawb paug.
Tom qab recrystallization tshav kub kho, Qib 5 titanium bar thiab kev ua tau zoo sib xws tsis zoo li steel forgings. Nyob rau hauv lub cheeb tsam ntawm cov hlau nruam, qhov tsawg magnification yog fuzzy crystals, thiab lub siab magnification yog equiaxed zoo crystals; nyob rau hauv qhov nyuaj-rau-deform cheeb tsam, vim yog me me ntawm deformation los yog tsis muaj deformation, cov qauv feem ntau khaws cia lub xeev ua ntej deformation. Yog li ntawd, thaum tuag forging ib co tseem ceeb titanium pas nrig qhov chaw (xws li compressor discs, hniav, thiab lwm yam), ntxiv rau kev tswj lub deformation kub hauv qab TB thiab ib tug tsim nyog deformation theem, nws yog ib qho tseem ceeb heev uas yuav tsum tau tswj cov qauv ntawm lub qub dawb paug. Txwv tsis pub, cov pob zeb ntxhib los yog Qee qhov tsis xws luag yuav tau txais los ntawm kev sib tsoo, thiab kev kho cua sov tom qab tsis tuaj yeem raug tshem tawm, uas yuav ua rau cov khoom seem ntawm forging.
Nyob rau hauv lub ntse deformation cheeb tsam uas cov thermal nyhuv nyob rau hauv lub zos concentrated, thaum forging titanium pas nrig forgings nrog complex duab ntawm rauj. Txawm hais tias qhov kub thiab txias yog tswj nruj, qhov kub ntawm cov hlau tseem tuaj yeem tshaj TB ntawm cov hlau. Piv txwv li, thaum ib tug titanium pas nrig dawb paug nrog ib tug I-zoo li tus ntoo khaub lig seem yog tuag-forged, lub rauj yog hnyav heev, thiab lub zos kub nyob rau hauv nruab nrab (web cheeb tsam) yog vim lub deformation thermal nyhuv. Lub ntug yog hauv zos siab li ntawm 100 degree. Tsis tas li ntawd, nyob rau hauv lub hard-to-deform cheeb tsam thiab cheeb tsam nrog ib tug tseem ceeb deformation theem, ib tug coarse-grained qauv nrog kuj tsis tshua muaj plasticity thiab durability yog ib qho yooj yim rau tsim thaum lub sij hawm cua sov txheej txheem tom qab tuag forging. Yog li ntawd, cov cuab yeej cuab tam ntawm forgings nrog cov duab nyuaj ntawm lub rauj feem ntau tsis ruaj khov. Txawm li cas los xij, nws yuav ua rau muaj kev nce ntxiv hauv kev ua haujlwm tsis zoo, txawm hais tias txo qhov kub ntawm forging cua sov tuaj yeem tshem tawm qhov kev pheej hmoo ntawm cov cua sov hauv zos ntawm qhov khoob. Cov cuab yeej hnav thiab kev siv hluav taws xob ntau ntxiv yuav tsum tau siv cov cuab yeej muaj zog dua. Thaum qhib tuag forging, burr poob nyiaj rau 15% -20% ntawm qhov hnyav. Cov pov tseg thev naus laus zis ntawm qhov clamping (yog tias qhov no yuav tsum tau tso tseg raws li kev tuag forging) suav txog 10% ntawm qhov hnyav. Cov txheeb ze poob ntawm cov burr hlau feem ntau yog nrog cov dawb paug. Rau qee qhov forgings nrog cov qauv asymmetric, qhov sib txawv loj hauv cheeb tsam hla ntu, thiab ib nrab forgings uas nyuaj rau sau, qhov burr noj yuav siab li 50%. Txawm hais tias tsis muaj burr poob nyob rau hauv kaw tuag forging, cov txheej txheem ua dawb paug yog qhov nyuaj thiab ntau qhov kev hloov pauv ntau yam grooves yuav undoubtedly nce auxiliary nqi.
