Kev soj ntsuam ntawm ntau cov nrib hom hauv titanium alloy forging
Titanium alloys tau siv dav hauv ib lub teb chaws, nkoj tsis zoo, thiab lub zog loj, corrosion tsis kam, thiab siab-kub tsis kam. Txawm li cas los xij, kev tawg ua tsis xws luag yog nquag tshwm sim thaum lub sij hawm forging, cuam tshuam rau cov khoom zoo thiab ntau dua kev ua tau zoo. Cov kab lus no tshuaj xyuas cov hom nrum ntau hauv titanium alloy forging, sib txuas cov txheej txheem tseem ceeb nrog kev tswj cov txheej txheem rau kev lag luam.
Xaus ntsej muag tawg pleb: "lub qhov txhab tuag" ntawm kev tso npe
Kawg lub ntsej muag tawg pleb yog ib qho ntawm qhov tsis xws luag nyob rau hauv titanium alloy forging, feem ntau tshwm sim thaum ingot ingsetting lossis kos theem. Nws cov xeeb ceem tshwj xeeb yog qhov tawg uas tshaj tawm radially raws kawg ntsej muag ntawm lub billet, thiab muaj mob hnyav, tuaj yeem tiv thaiv kev zam ntxiv. Lub ntsiab lus tseem ceeb suav nrog:
Residual Metallurgical tsis xws luag:Cov tsis tiav kev tshem tawm ntawm shrinkage kab noj hniav ntawm lub taub hau ntawm lub taub hau ntawm lub taub hau ntawm lub taub hau ntawm lub taub hau ntawm lub taub hau ntawm lub taub hau lossis kaw txias ntawm tus Tsov tus tw tuaj yeem ua cov nrawm nyob hauv qab kev zam. Piv txwv li, ib qho tc4-lc titanium alloy ingot tsim los ntawm-qhov tawg ntawm sab thaum thawj zaug teeb tsa kev tshem tawm ntawm subsurface pores.
Uncontrolled kub gradients:Thaum chim siab, tiv tauj ntawm lub ntsej muag kawg thiab rab rauj anvil ua rau nrawm kub dissipation. Thaum lub sijhawm kos duab, tus nqi txias ntawm qhov raug mob ntawm lub ntsej muag kawg tau tshaj 30℃/ s, ua rau muaj cov cheeb tsam brittleness.
Kev tsis sib xws:Txo kev txo qis hauv ib qho dhau los yog kev tawm tsam ntau dhau los ntawm kev sib tsoo hlau ntws hauv qhov tseem ceeb ntawm lub ntsej muag kawg, ua rau sunken cracks. Hauv ib ta15 titanium alloy bar ntsuas kwv yees kwv yees li 85mm hauv kev tawg mus txog 12mm tob tau raug kuaj pom hauv qhov tseem ceeb vim kev kos duab ntau dhau.
Kev tiv thaiv kev tiv thaiv: Siv kev kuaj ultrasonic kom huv si tshem tawm kev tsis meej. Npog cov billet xaus ntsej muag nrog rwb thaiv tsev wwb thaiv tsev thaum muaj kev txo qis qis dua lossis sib npaug ntawm cov rauj anheat kub rau ntau dua lossis sib npaug rau 300 degree.
Folding cracking: ib qho zais "killer"
Folding cracking feem ntau tshwm sim los ntawm kev ntxhov siab hlau ntws thaum lub sij hawm forging thiab manifests li txheej tsis xws lossis hauv lub billet. Tus tsim kev tsim mechanism tuaj yeem faib rau hauv peb hom:
Thaum pib qhov xwm txheej:Ingots nrog qhov siab-rau-txoj kab uas muaj ntau dua los yog sib npaug ntawm 2.5 lossis cov khoom seem los ntawm cov khoom sib txuas hauv nruab nrab, uas ua rau cov khoom siv hlau sib txawv raws li kev ntxhov siab. Ib qho TB6 Titanium Alloy Bashet Tsim Folding nrib pleb mus txog 8 hli tob tom qab forging vim tsis muaj kev pom zoo uas tsis pom kev graphes.
Txheej txheem yuam kev:Lub billet tilts thaum pom, ua rau muaj kev hloov pauv sai sai hauv kev hla ntu. Ua tsis tiav rau Polish cov ces kaum ntse thaum lub sij hawm 180℃flipment thiab txuas ntxiv ua tuaj yeem ua rau folding.
Cov txheej txheem txheej txheem tsis xws luag:Machining cuab yeej ntsuas, oxide nplai intrusion, thiab lwm yam tsis xws luag tuaj yeem nthuav mus rau hauv folds thaum txais kev zam txim.
Cov ntaub ntawv ib txwm muaj: thaum tuag tsis lees paub ntawm lub dav hlau lub tshuab disc, cov nplai oxide tsis tau raug ntxuav los ntawm kev tso tawm saum npoo av thiab ib qho 30% seem. Kev daws: nruj me ntsis siv "peb kuaj xyuas" (kev tshuaj xyuas tus kheej, thiab kev coj ua cov billet), kev coj ua zas xim los tswj cov tob kom tsawg dua lossis sib npaug rau 0.5mm.
Tearing thiab sab hauv cov kab nrib pleb: ib qho tob "organic teeb meem"
Lub kua muag feem ntau tshwm sim thaum lub sij hawm tensile deformation theem, manifesting li transverse cracks. Lawv cov hauv paus ua rau yog:
Kev tswj tsis tau deformation tsis muaj:Txo kev txo ntau lossis txo qis kom txo qis hauv ib tus xeem ua rau cov hlau tsis sib xws. Hauv ib qho TB6 titanium alloy slab, vim ib qho-ib sab kev txo ntawm 60mm, lub qhov muag dhau los ntawm ib nrab ntawm phaj tuab.
Tooling hnav:Hnav ntawm cov caj dab thaiv ua rau kev ntxhov siab. Hauv lwm TC4-DT titanium alloy alloy kauj ruam ncej, deformation ntawm lub jertvil tshwm sim los ntawm cov kauj ruam kev hloov pauv.
Sab hauv cov kab nrib pleb yog zais hauv lub billet thiab feem ntau pom hauv cov ntaub ntawv me me (ø tsawg dua lossis sib npaug nrog cov alloys muaj kev sib luag (xws li Ti3alNB). Lawv tsim muaj feem nrog cov hauv qab no:
Metallurgical segregation:Kev cais tawm ntawm cov lus refractory xws li tungsten thiab molybdenum ua rau cov qauv sib txuas hauv zos. Thaum lub sij hawm ua kom pom tseeb ntawm TA15 titanium alloy, sab hauv kab nrib pleb tau pom hauv qhov tseem ceeb, thiab kev ntsuas pom tau pom tias lawv tau tshwm sim los ntawm NB Segregation.
Ua tsis tiav ntawm kev tswj hwm kub:Tsawg chamfering kub los yog thim rov qab forging ua rau kub siab tshaj 50 degree. Qee qhov TI60 Alloy tsim cov kab nrib pleb ntev dhau 200 hli nyob rau hauv ntev ntawm Chamfer vim overly ceev dej txias.
Cov txheej txheem optimization: muaj ntau yam forging txheej txheem (chim siab-chim-upsetting mus txog thaum lub cumulative anrealing ua thaum lub cumulative deformation tau tshaj 70%. Ib qhov system infrared thermal tau nruab rau kom ntseeg tau tias lub billet kub sib txawv tseem nyob hauv qab 30 degree.
Brittle Crushing: "Achilles 'pob taws" ntawm kev kub siab-alloys
Nyuaj-rau-deform high-kub titanium alloys (xws li Imi 834) yog qhov rhiab heev rau qhov kub thiab txias thiab muaj zog rau nkig tawg thaum forging:
Ntau dhau qhov kawg forging kub:Hauv qab no cov recrystallization kub, tus hlau lub plasticity poob qis. Ib qho kub-kub titanium cov ntaub ntawv ntsuas, nrog kev ntsuas kub kawg ntawm tsuas yog 980 degree, ze li ntawm kev tawg.
Cua Sov Cov Txheej Txheem Tsis Txaus Siab:Cov cua kub dhau heev tau ua rau muaj qhov kub thiab txias tshaj 100℃ntawm qhov xaus thiab nruab nrab. Ib lub Ti3al Ingot txom nyem hauv zos sib tsoo thaum muaj cua sov vim tias tsis muaj rwb thaiv tsev qhwv.
Txoj kev hloov tsis zoo:Tom qab cov dej txias ua rau muaj kev ntxhov siab. Thaum lub sij hawm rounding ntawm TC19 Alloy, Longitudinal cov kab nrib pleb uas tsim vim muaj cov nqi txias txias ntawm cov npoo chamfered.
Kev Tiv Thaiv thiab Tswj Cov Tswv Yim: Siv cov txheej txheem cua sov staged (piv txwv li kev tuav cov theem thaum 6 Qib Kawg Tsis pub dhau 50 Qib ntawm Kev Hloov Pauv Hloov. Rau kev nyuaj-rau-deform alloys, siv asbestos cladding. Rau Ta12a alloy, cov forging protce tus nqi nce los ntawm 63.29% rau 71.45% dhau los ntawm Asbestos cladding.
Cov kab nrib pleb thiab alpha nkev txheej: zais "killers"
Cov kab nrib pleb yog feem ntau tshwm sim los ntawm kev tshaj tawm tsawg kawg forging kub lossis lub sijhawm ntev sib ze. Ib lub titanium alloy plhaub tau pom tias muaj los ntawm cov kab nrib pleb thaum lub sijhawm siv ntxhib machining. Lub hauv paus ua rau yog qhov tsim ntawm cov pa-nplua nuj alpha txheej (txog li 0.2 hli tuab) thaum muaj kev sib tuag saum ntuj los ntawm 30% thiab nce ntxiv brittleness.
Kev daws:
Cov Khoom Siv Roj Av:Siv cov kua roj lub zog thaum nias tuag forging kom txo kev sib txhuam ntawm lub billet thiab tus tuag; Lub sijhawm luv luv hu rau ntawm lub billet thiab tus tuag qis dua los yog sib npaug rau 2s thaum rauj forging.
Kev tswj hwm cua:Tswj cov pa oxidizer me ntsis (O₂ cov ntsiab lus tsawg dua lossis sib npaug nrog 0.5%) hauv qhov cub tawg thaum muaj kev zam txim. Lub tshuab nqus tsev Anneal seem nrog ntau cov ntsiab lus hydrogen ntau dhau.
Kev tiv thaiv thiab tswj kev tawg hauv titanium alloy Forging yuav tsum muaj txoj hauv kev thoob plaws hauv tag nrho cov metallurgical, txheej txheem, thiab khoom siv saw. Txoj kev pheej hmoo ntawm kev tawg tuaj yeem txo qis los ntawm kev ua kom zoo nkauj forging cov txheej txheem (piv txwv li ntau dua los yog sib npaug rau 2 zaug ib tua hluav taws). Nyob rau yav tom ntej, nrog rau daim ntawv thov ntawm digital ntxig thev naus laus zis, muab cov khoom siv pressision ntau dua, muab cov cuab yeej tsim khoom siab rau cov cuab yeej siv siab.
