6063 Aluminium alloy belongs rau cov qis-alloyed al-mg-Si series ua kom yooj yim-kho tau txhuas txhaj tshuaj. Nws muaj extrusion zoo moulding moulding moulding kev ua tau zoo, zoo corrosion tsis kam thiab cov khoom siv tshuab ua kom zoo dua. Nws tseem dav siv nyob rau hauv kev lag luam hauv tsheb vim nws yooj yim oxidation xim. Nrog rau kev nrawm ntawm cov qauv ntawm lub teeb hlau sib xws, daim ntawv thov ntawm 6063 aluminium alsoy alloy extrusion cov ntaub ntawv hauv kev lag luam automotive tseem muaj ntxiv ntxiv.
Lub microstructure thiab cov khoom ntawm extruded cov ntaub ntawv raug cuam tshuam los ntawm kev sib xyaw ua ke ntawm extrusion ceev, extrusion kub thiab extrusion piv. Ntawm lawv, qhov extrusion piv yog tsuas yog txiav txim siab los ntawm qhov kev tshem tawm siab siab, ntau lawm cov cuab yeej ua haujlwm thiab cov khoom siv ntau lawm. Thaum qhov extrusion piv yog me me, lub alloy deformation yog me me thiab microstructure ua kom zoo nkauj tsis pom tseeb; Ua kom muaj kev tshem tawm cov nplej ntxiv tuaj yeem ua kom zoo dua cov nplej, tawg ua cov txheej txheem me me, muab ib pawg ntawm cov khoom siv hluav taws xob thib ob, thiab txhim kho cov khoom siv tshuab ntawm cov alloy.
6061 thiab 6063 Alloys Alloys Thawv Dynamic Recrystallization Thaum lub sijhawm ua haujlwm. Thaum lub excusion kub yog tas li, raws li kev tiv thaiv cov extrusion ntau, thiab lub zog tensile thiab elongation ntawm alloy nce raws li; Txawm li cas los xij, raws li qhov extrusion piv txwv, qhov extrusion quab yuam ua rau txoj kev ua kom sov ntxiv, ua rau muaj qhov kub tshaj plaws ntawm cov khoom kom tsawg dua. Qhov kev sim no tshawb xyuas cov txiaj ntsig ntawm kev rho tawm extrusion piv, tshwj xeeb loj extrusion piv, ntawm microstructure thiab cov khoom siv cov khoom siv ntawm 6063 aluminium alloy.
1 Cov ntaub ntawv sim thiab cov hau kev
Cov khoom sim yog 6063 aluminium alloy, thiab cov tshuaj lom neeg muaj pes tsawg leeg yog ingot yog ing5, thiab nws tau ua tiav rau qhov loj ntawm φ50 mm × 150 mm tom qab homogenization Kev kho ntawm 560 ℃ rau 6 h. Lub billet yog rhuab rau 470 ℃ thiab khaws cia sov. Lub preheating kub ntawm extrusion barrel yog 420 ℃, thiab lub preheating kub ntawm cov pwm yog 450 ℃. Thaum Extrusion Ceev (Extrusion Rod Tsiv Tsoo Tawm Tsam) v = 5 pawg ntawm cov kev sib txawv sib txawv 25 (d = 10 hli), 39 (d = 8 hli), 69 (d = 6 hli), thiab 156 (d = 4 hli).
Cov lus 1 cov khoom siv tshuaj lom neeg ntawm 6063 al alloy (wt /%)
Tom qab cov xuab zeb sib tsoo thiab kho tshuab polishing, cov metallographic cov qauv tau etched nrog cov qauv tau pom nyob rau ntawm Leica-5000 tsom iav. Kev txheeb xyuas cov qauv nrog qhov loj ntawm 10 hli × 10 hli tau txiav los ntawm qhov chaw ntev ntawm cov pas nrig ntev ntawm cov txheej txheem extruded, thiab etching tau ua kom tshem tawm cov txheej txheem kev ntxhov siab saum npoo av. Cov ntaub ntawv tsis tiav ntawm peb lub zog crystal {111}, thiab {220}, thiab {220}, thiab cov ntaub ntawv kev ntxhib los yog cov ntaub ntawv los ntawm x'pert cov ntaub ntawv saib thiab X'pert kev ntxhib los mos software.
Lub tensile quav ntawm cam khwb cia alloy tau coj los ntawm lub chaw ntawm ingot, thiab tensile pittimen tau txiav raws cov kev txiav txim siab tom qab extrusion. Lub ntsuas hluav taws xob qhov loj yog φ4 mm × 28 hli. Lub Tensile sim tau nqa tawm siv cov khoom lag luam CMT5105 universal khoom kuaj tshuab nrog lub tensile tus nqi ntawm 2 hli / min. Tus nqi nruab nrab ntawm peb hom qauv cov qauv tau muab xam raws li cov khoom siv cov khoom ntiag tug. Lub pob zeb morphology ntawm cov tensile cov hnoos qeev tau siv qhov ntsuas hluav taws xob tsawg-ntsuas hluav taws xob (Quanta 2000, FEI, Asmeskas).
2 cov qhab nia thiab kev sib tham
Daim duab 1 qhia tau cov metallographic microstructure ntawm AS-cam khwb cia 6063 Alloy Alloy ua ntej thiab tom qab kev kho mob homogenization. Raws li muaj nyob hauv daim duab 1a, cov nplej α-cam khwb cia microstructure sib txawv, thiab ntau tus lej ntawm cov ciaj ciam av, thiab ntau ntawm cov kab mangular mg2si nyob rau hauv cov nplej. Tom qab ingot yog homogenized ntawm 560 ℃ rau 6 h, qhov tsis muaj sib npaug, cov alloy cov theem sib txawv, thiab cov khoom lag luam uas muaj li ntawm 125 μm ).
Ua ntej homogenization
Tom qab kev kho mob tshwj xeeb ntawm 600 ° C rau 6 teev
Fig.1 MEALLogrographic Cov Qauv ntawm 6063 Alloy Alloy ua ntej thiab tom qab kev khoogenization
Daim duab 2 qhia cov tsos ntawm 6063 aluminium alloy tuav nrog qhov sib txawv extrusion sib piv. Raws li pom hauv daim duab 2, qhov chaw zoo ntawm 6063 aluminium alloy aluminium alloy aluminium alloy athoy allotrusion Piv tawm yog nce mus rau qhov bar extrusion qhov chaw ceev ceev ntawm 48 m / min), tseem muaj tseem tsis muaj Extrusion Discts xws li cov kab nrib pleb thiab tev ntawm lub npoo, qhia tau tias 6063 aluminium alloter kuj muaj zoo kub expusion freed thiab loj extrusion piv.
Fig.2 Cov tsos ntawm 6063 aluminium alloy pas nrig nrog kev sib txawv extrusion sib piv
Daim duab 3 qhia tau cov metallographic microstructure ntawm cov ntu ntev ntawm 6063 aluminium alloy bar nrog qhov sib txawv extrusion sib piv. Cov qauv nplej ntawm lub bar nrog kev sib txawv extrusion piv qhia cov qib sib txawv ntawm elongation lossis ua kom zoo dua. Thaum cov nplej txuas ntxiv yog 17, cov qub nplej yog elongated raws qhov kev sib xyaw ntawm cov qoob loo me me, tab sis cov nplej uas muaj ntau dua li 85 μm (daim duab 3A) ; Thaum cov nplej txuas ntxiv yog 25, cov nplej tau rub ntau dua, tus lej ntawm cov qoob loo recrystallized nce, thiab cov nplej uas muaj qhov loj me txo mus txog li 71 μm (daim duab 3b); Thaum qhov extrusion piv yog 39, tshwj tsis yog rau tus naj npawb me ntawm deformed nplej, lub microstructure yog qhov loj me, nrog nruab nrab lis loj ntawm 60 μm (daim duab 3C); Thaum qhov extrusion piv yog 69, tus txheej txheem Recrystallization yog qhov yooj yim ua tiav, thiab cov khoom siv hluav taws xob uas ua kom zoo dua li 41 μm (daim duab 3D); Thaum qhov extrusion piv yog 156, nrog rau tag nrho cov kev nce qib ntawm cov txheej txheem Recrystallization, cov microstructure ntau dua li 32 μm (Daim duab 3E). Nrog kev nce ntawm extrusion piv, cov txheej txheem recrystallization tau ua kom muaj zog ntau dua, thiab cov qoob loo loj yog ua kom zoo nkauj (daim duab 3f).
Daim duab.3 daim hlau me ntawm cov ntu ntev ntawm 6063 aluminium alloy pas nrig nrog kev sib txawv extrusion sib piv
Daim duab 4 qhia txog cov duab uas tsis pom zoo ntawm 6063 aluminium alloy tuav nrog kev sib txawv extrusion sib piv raws li kev coj mus rau. Nws tuaj yeem pom tau tias cov microstructures ntawm alloy tuav nrog kev sib txawv sib txawv txheeb xyuas txhua yam tsim cov kev qhia pom tseeb. Thaum qhov extrusion piv yog 17, ib qho tsis muaj zog <115>> + <100> kev ntxhib los mos yog tsim (daim duab 4a); Thaum qhov kev rho tawm piv yog 39, cov khoom siv ntxhib yog tsuas yog qhov muaj zog <100> kev ntxhib los mos thiab muaj zog me me <115>>); Thaum qhov extrusion piv yog 156, cov ntsiab lus cov ntsiab lus yog qhov <100> kev siv zog ntxiv, thaum lub <115>> cov ntawv cim ploj (Daim duab 4C). Cov kev tshawb fawb tau pom tias lub ntsej muag sib luag ntawm cov ceg mis tsuas yog daim ntawv <111> thiab <100> thiab <100> thiab kab hlau lub sijhawm extrusion thiab kos duab. Thaum cov ntawv nyeem yog tsim, chav sov cov khoom kub cov khoom ntawm Alloy qhia pom anisotropy. Lub zog ua tiav nce nrog kev nce ntawm qhov kev tshem tawm extrusion hauv ib qho kev sib tw ua kom sib luag hauv cov txheej txheem alloy nce ntxiv, thiab lub zog ntev tensile ntawm cov alloy nce. Lub zog expaging meatycisms ntawm 6063 aluminium alloy kub expusion cov ntaub ntawv siv nyob rau hauv cov txheej txheem kev sim ua hauv cov kev sim ua hauv qhov kev txhawb nqa ntawm qhov ua tau zoo li qub dua.
Fig.4 Rov Qab Ncej Daim Duab ntawm 6063 Alloy Alloy Rods nrog qhov sib txawv extrusion Piv Txwv
Daim duab 5 yog cov histogram ntawm cov tensile cov khoom ntawm 6063 aluminium alloy tom qab deformation ntawm kev sib txawv extrusion sib piv. Lub zog tensile ntawm cov cam khwb cia alloy yog 170 mpa thiab elongation yog 10.4%. Lub zog tensile thiab elongation ntawm alloy tom qab txhim kho, thiab lub zog tensile thiab elongation zog nce nrog kev nce ntawm kev ntxiv ntawm kev ntxiv ntawm kev rho tawm piv. Thaum lub zog extrusion yog 156, lub zog tensile thiab elongation ntawm alloy ncav cuag tus nqi ntau tshaj plaws ntawm lub cam khwb cia ntawm cov alloy thiab txog 158% siab dua elongation. Lub zog tensile ntawm 6063 aluminium alloy tau los ntawm qhov loj ntxiv rau tensile muaj nuj nqis (ecap), uas yog ntau dua li tensile muaj txiaj ntsig (171.1 mpa) Tau los ntawm 1-dhau ECAP Extrusion ntawm 6063 aluminium alloy. Nws tuaj yeem pom tau tias qhov kev tshem tawm loj ntxiv tuaj yeem txhim kho cov khoom siv cov khoom siv ntawm cov alloy rau ib qho.
Kev txhim kho ntawm cov khoom siv cov khoom siv ntawm cov alloy los ntawm extrusion piv yeem yog los ntawm cov nplej ua kom muaj zog ntxiv dag zog. Raws li kev rho tawm ratio tsub zuj zus, cov nplej tau ua kom zoo nkauj thiab kev rho tawm tsis tau nce ntxiv. Ntau cov qoob loo cov ciaj ciam ib cheeb tsam tuaj yeem cuam tshuam rau kev txav mus kom zoo, ua ke nrog kev sib nrig sib thiab tsis sib haum xeeb, yog li kev txhim kho lub zog ntawm cov alloy. Tus finer cov nplej, cus ntau ntau thaj tsam ntawm cov qoob loo nplej, thiab cov qoob loo muaj peev xwm kis tau rau kev tsim cov kab nrib pleb, cia nyob ib leeg ntawm cov kab nrib pleb. Lub zog ntau ntxiv tuaj yeem nqus tau thaum lub sijhawm ua pob txha lov, yog li txhim kho cov plasticity ntawm cov alloy.
Fig.5 Tensile Cov Khoom ntawm 6063 Alloy Alloy Tom qab Casting thiab Extrusion
Lub tensile pob morphology ntawm alloy tom qab deformations muaj nyob hauv cov qauv morphology ntawm cov qauv kev sib txawv (daim duab 6a), thiab cov pob txha tawv 6, , qhia tau tias tensile bacture mechanism ntawm AS-cam khwb cia alloy tau tsuas yog brittle tawg. Lub pob txha caj dab morphology ntawm alloy tom qab extrusion tau hloov pauv ntau yam, thiab kev sib tw tau hloov pauv ntawm brittle bacterure los duci bacture. Thaum qhov extrusion piv yog me me, lub dimples yog qhov ntiav thiab qhov loj me me yog loj, thiab kev faib tawm tsis xwm yeem; Raws li qhov extrusion piv txwv, tus naj npawb ntawm Dimples loj zuj zus, uas tau faib khoom yog qhov zoo dua qub, uas yog sib xws zoo dua ntawm cov khoom siv mechanical.
3 Xaus
Hauv qhov kev sim no, qhov tshwm sim ntawm kev sib txawv extrusion Piv txwv ntawm microstructure thiab cov khoom ntawm lub pob zeb loj, ingot cua sov kub thiab excel dua tsis hloov. Cov lus xaus yog raws li hauv qab no:
1) Dynamic recrystallization tshwm sim nyob rau hauv 6063 aluminium alloy thaum lub sij hawm kub extrusion. Nrog rau kev nce ntawm extrusion piv, thiab nplej yog txuas ntxiv ua raws li cov khoom sib txawv ntawm cov nplej, thiab lub zog ntawm <100> xaim micro txuas ntxiv.
2) Vim yog cov txiaj ntsig ntawm cov hmoov nplej nplua zog, cov khoom siv mechanical ntawm cov alloy tau txhim kho nrog kev nce ntawm extrusion piv. Tsis pub dhau cov kev ntsuas ntawm cov xeem, thaum lub zog extrusion yog 156, el lub zog ntawm lub alloy ncav cuag cov nqi siab tshaj plaws ntawm 228 mpa thiab 26.9%, feem.
Fig.6 tensile pob txha morphologies ntawm 6063 aluminium alloy tom qab casting thiab extrusion
3) Lub pob zeb morphology ntawm cov hnoos qeev uas yog tsim ntawm thaj chaw tiaj tus thiab kua muag. Tom qab extrusion, lub pob txha lov yog tsim los ntawm ntau ntawm equiaxed dimples, thiab lub pob txha lov tau hloov los ntawm brittle fracture los duci pob txha lov.
Lub Sijhawm Post: NOV-30-2024
