Titanium Alloy Machining Surface Analysis

Pom nyob rau hauv ntau lawm, titanium alloy machining nto zoo ntawm kev ua tsis tau zoo tshaj corrosion, dai grey, oxide daim tawv nqaij tsis raug tshem tawm thiab streak-zoo li splotch ntau yam.
1. Overcorrosion
Kev xeb ntau dhau yog hais txog qhov chaw ntawm titanium alloy tom qab pickling pits los yog unevenness thiab lwm yam tsis xws luag, thiab lub koom haum cov ntaub ntawv qhia ib tug txawv, feem ntau ua rau ntau heev corrosion tsis xws luag yog qhov ratio ntawm hydrofluoric acid thiab nitric acid yog tawm ntawm kev faib ua feem, siab heev concentration. ntawm hydrofluoric acid lossis nitric acid concentration tsis txaus tuaj yeem ua rau muaj qhov tsis xws luag, lwm qhov laj thawj yog tias lub sijhawm pickling ntev dhau lawm, qhov dav dav pickling t yog 1 hli ~ 4min, raws li kev ua haujlwm ntawm qhov chaw los kho cov txheej txheem Lwm qhov laj thawj yog tias lub sijhawm pickling ntev dhau lawm.
2. dai tshauv
Hanging tshauv yog hais txog cov oxide txuas rau saum npoo ntawm titanium alloy tom qab pickling, pickling los ntawm qhuav titanium alloy thiab acid tshuaj cov tshuaj tiv thaiv, uas ua rau cov tsub zuj zuj ntawm oxides rau saum npoo, tiv thaiv cov tshuaj tiv thaiv los ntawm kev tshwm sim ntxiv, qhov tsis xws luag ntawm dai tshauv yog Feem ntau cov tshauv ntau dhau los ntawm pickling thiab tsis txaus yaug tom qab pickling. Pickling yuav tsum tas li co cov khoom, kom cov tshuaj tiv thaiv cov khoom los ntawm qhov chaw ntawm titanium alloy tawm, pickling yuav tsum tau ntxiv dag zog rau tom qab txau los yog yaug txoj kev kom tshem tawm cov hanging tshauv. Hauv tsev feem ntau siv cov cua compressed thiab kais dej sib xyaw nrog cov dej nrawm nrawm, cov nyhuv yog qhov zoo.
3. Cov tawv nqaij oxidized tsis raug tshem tawm
Qhov ua rau ntawm qhov tsis xws luag no ntau dua, txhua txoj kev ua tau. Tej zaum yuav muaj kev tshem tawm cov roj tsis zoo, lossis lub sijhawm kho ntsev ntsev tsis txaus, lossis cov kua dej tsis ua haujlwm. Thaum qhov tsis xws luag tshwm sim, yuav tsum tau muab tshem tawm ib qho los ntawm ntau yam ua tau, thaum tsim nyog, tuaj yeem muab ntxiv rau hauv kev kho ua ntej ntawm cov xuab zeb blasting txheej txheem.
4. Streak qauv
Qhov ua rau ntawm qhov tsis xws luag no feem ntau yog vim qhov tsis sib xws. Nws tuaj yeem raug tshem tawm los ntawm kev co cov khoom thaum lub sij hawm pickling thiab txo qhov kub ntawm cov tshuaj pickling. Ntxiv rau qhov tsis xws luag saum toj no, qee zaum kuj pom tom qab pickling tshuaj xyuas ntawm cov khoom tsim nyog, tom qab ib lub sij hawm, qhov chaw ntawm qhov tshwm sim ntawm qhov chaw. Rau qhov tshwm sim no, tam sim no tsis tshua muaj kev tshawb fawb, tej zaum yuav yog vim lub nto ntawm cov residual acid tom qab pickling los yog tom qab zus tau tej cov corrosive xov xwm coj mus rau hauv lub xub ntiag ntawm kev sib koom tes ntawm kev nyuaj siab, nyob rau hauv lub microscopic nrhiav pom nrog cov qauv corrosion feem ntau txawv, feem ntau. Kev hais lus tsis cuam tshuam rau nws txoj kev siv cov kev ua tau zoo, tuaj yeem raug tshem tawm los ntawm txoj kev pickling dua, tab sis qhov kev ntxhov siab los txhawb qhov thib ob pickling tom qab dehydrogenation txheej txheem.
I. Cov yam ntxwv cuam tshuam rau kev ua haujlwm ntawm titanium alloy
Thermal conductivity, modulus ntawm elasticity, tshuaj lom neeg kev ua si thiab alloy hom thiab microstructure yog lub ntsiab yam tseem ceeb cuam tshuam lub machining kev ua tau zoo ntawm titanium alloy. Titanium alloy thermal conductivity yog me me, txog 1/3 ntawm cov hlau, lub tshav kub generated thaum lub sij hawm machining yog ib qho nyuaj rau tso tawm los ntawm lub workpiece; Nyob rau tib lub sijhawm, vim qhov tshwj xeeb kub ntawm titanium alloy, qhov kub thiab txias hauv zos nce sai sai thaum ua, yog li ntawd. Nws yog ib qho yooj yim ua rau lub cuab yeej kub siab heev, yog li ntawd lub hau ntawm lub cuab yeej ntse hnav, kev pab cuam lub neej yog txo. Cov kev sim tau ua pov thawj tias cov cuab yeej txiav qhov kub ntawm titanium alloy yog 2-3 zaus siab dua qhov kub ntawm cov hlau txiav.

Titanium alloy tsis tshua muaj kev hloov pauv ntawm elasticity, yog li cov txheej txheem txheej txheem yuav rov ua dua, tshwj xeeb tshaj yog cov txheej txheem ntawm cov phab ntsa nyias nyias yog qhov hnyav dua, yooj yim ua rau muaj kev sib txhuam ntawm lub ntsej muag nraub qaum thiab cov txheej txheem ua tiav, yog li hnav cov cuab yeej thiab chipping. . Titanium alloy tshuaj lom neeg muaj zog heev, kub kub yog yooj yim heev nrog oxygen, hydrogen, nitrogen lub luag hauj lwm, kom nws hardness nce, plasticity txo, nyob rau hauv lub cua sov thiab forging txheej txheem ntawm lub tsim ntawm oxygen nplua nuj txheej ntawm machining nyuaj. Titanium alloys nrog sib txawv alloys muaj cov khoom sib txawv machining, nyob rau hauv lub xeev annealed, ib hom titanium alloy machining kev ua tau zoo dua; ib + - hom titanium alloy yog thib ob; -type titanium alloy muaj lub zog siab, zoo hardenability, tab sis kev ua haujlwm tsis zoo.
Nyob rau hauv qhov kev pom ntawm cov saum toj no, thiaj li yuav ua tau high-efficiency thiab high-precision machining ntawm titanium alloys, coj kev ntsuas yuav tsum tau coj mus rau hauv tus account lub cim ntawm tsis xws luag nyob rau hauv machining.
Thib ob, kev kawm ntawm ntau yam machining ntawm titanium alloys
Muaj ntau txoj hauv kev ntawm titanium alloy machining, feem ntau suav nrog: tig, milling, tho txawv, drilling, sib tsoo, tapping, sawing, EDM thiab lwm yam.
1. Tig thiab tho txawv ntawm titanium alloy

Cov teeb meem tseem ceeb ntawm kev tig titanium alloys yog: siab txiav kub; hnav cov cuab yeej hnyav dua; thiab siab txiav kickback. Raws li tsim nyog machining tej yam kev mob. Tig thiab tho txawv tsis yog cov txheej txheem nyuaj tshwj xeeb. Rau kev txiav tsis tu ncua, kev tsim khoom loj lossis loj hlau tshem tawm txiav, feem ntau siv cov cuab yeej carbide, thaum lub molding txiav, tig zawj lossis txiav tawm, haum rau kev kho cov cuab yeej steel, cov cuab yeej hlau ceramic kuj siv. Raws li nrog rau lwm yam kev ua haujlwm machining, txiav kev cuam tshuam tuaj yeem zam tau los ntawm ib txwm siv cov khoom noj tsis tu ncua. Tsis txhob nres lossis qeeb thaum txiav. Feem ntau tsis txiav tab sis txias txaus; lub coolant tuaj yeem yog 5% sodium nitrate aqueous tov los yog 1/20 soluble roj emulsion aqueous kua. Ua ntej kuv yuav zam rau cov cuab yeej oxygen siv cov cuab yeej carbide, qhov tob ntawm 2 {}}}}}}} ~ 30}, pub 0.1 ~ 0.2 hli / r. Kev tho txawv yog tiav, tshwj xeeb tshaj yog rau nyias-walled titanium alloy khoom nyob rau hauv cov txheej txheem tho txawv, yuav tsum tau tiv thaiv los ntawm kub hnyiab thiab deformation ntawm qhov chaw clamping.
2. Titanium alloy drilling txheej txheem
Titanium alloy drilling yog ib qho yooj yim kom loj hlob thiab nyias curly chips, thaum drilling kub yog loj, yooj yim los ua ntau tsub zuj zuj ntawm tej daim los yog adhesion nyob rau hauv lub drilling ntug, uas yog lub ntsiab yog vim li cas rau drilling titanium alloy nyuaj. Drilling yuav tsum tau siv ib tug luv luv thiab ntse xyaum me ntsis thiab tsawg-ceev quab yuam pub, lub bracket kev them nyiaj yug yuav tsum nruj, thiab yuav tsum tau muab rov qab txaus txias, tshwj xeeb tshaj yog qhov tob qhov drilling. Thaum lub sij hawm drilling lub laum me ntsis yuav tsum tau khaws cia rau hauv lub qhov thiab tsis tso cai rau idle nyob rau hauv lub qhov, thiab ib tug tsawg thiab tas li drilling ceev yuav tsum tau khaws cia. Drilling los ntawm lub qhov yuav tsum tau ua tib zoo ua tib zoo, thiab thaum txog rau kev xyaum, nws yog ib advisable mus rov qab lub laum me ntsis thiaj li yuav ntxuav lub me ntsis thiab lub qhov, thiab tshem tawm laum cuttings, thiab siv ib tug quab yuam pub thaum lub qhov kawg. tawg, kom lub qhov du yuav tau.
3.Tapping ntawm titanium alloy
Tapping ntawm titanium alloy yog tej zaum qhov nyuaj tshaj plaws machining txheej txheem. Thaum tapping, txwv titanium nti tsis suav nrog thiab hnyav hnyav hnyav yuav ua rau cov xov tsis zoo, ua rau tus kais dej los yog tawg. Thaum ua tiav ntawm tapping, titanium nyhav kom qhuav thiab nruj ntawm tus kais dej. Yog li ntawd, yuav tsum tau sim kom tsis txhob ua qhov qhov muag tsis pom los yog ntev dhau los ntawm lub qhov, txhawm rau tiv thaiv cov xov sab hauv ntawm qhov roughness ua loj lossis tawg lub khob zoo li tshwm sim. Nyob rau tib lub sijhawm, txoj kev tapping yuav tsum tau txhim kho tsis tu ncua, xws li sab nraub qaum ntawm tus kais dej tuaj yeem ua rau hauv av. Raws li qhov ntev ntawm tus hniav ntug ntawm sab saum toj ntawm cov hniav sib tsoo axial nti tshem tawm zawj thiab lwm yam. Ntawm qhov tod tes, cov kais dej nrog oxidized, oxidized los yog chrome-plated nto yog siv los txo cov galling thiab hnav.
4. Sawing ua ntawm titanium alloy
Thaum sawing titanium alloy, tsis tshua muaj qhov nrawm nrawm thiab tsis tu ncua kev pub mis yuav tsum tau siv. Cov kev sim tau ua pov thawj tias cov hniav sib nrug ntawm 4.2mm ~ 8.5mm ntxhib hniav high-speed steel saw hniav yog tsim rau sawing titanium alloy. Yog hais tias lub band pom pom titanium alloy, lub saw hniav hniav pitch yog txiav txim los ntawm lub thickness ntawm lub workpiece, feem ntau 2.5mm ~ 25.4mm, lub thickness ntawm cov ntaub ntawv, qhov loj ntawm cov hniav pitch. Nyob rau tib lub sijhawm yuav tsum tuav lub peev xwm pub khoom noj thiab qhov xav tau kom txias.
5. Titanium rooj kub hluav taws xob tawm machining
Titanium alloy hluav taws xob tawm machining yuav tsum tau ntawm cov cuab yeej thiab workpieces ntawm - ib qho kev khiav hauj lwm sib txawv. Qhov sib txawv yog qhov zoo tshaj plaws nyob rau hauv 0.005mm 0.4mm, qhov sib txawv me me feem ntau yog siv rau hauv cov kev xav tau ntawm kev ua kom zoo nkauj, qhov sib txawv loj yog siv rau hauv cov kev cai ntawm kev tshem tawm sai ntawm cov hlau roughing. Cov khoom siv tooj liab thiab zinc electrode yog nyiam.
Los ntawm kev txheeb xyuas thiab kev tshawb fawb saum toj no, qhov ua tsis tiav ua rau titanium alloy machining nto zoo tau muab los, thiab ntau txoj hauv kev hauv cov txheej txheem machining raug txheeb xyuas, txhawm rau nrhiav cov tswv yim los daws cov teeb meem ntawm titanium alloy machining nto zoo.