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The makina katundu wa 6Al4V AMS 4928 Titanium Bar ndizochita chidwi kwambiri m'mafakitale osiyanasiyana chifukwa cha kuchuluka kwake kwamphamvu ndi kulemera kwake, kukana dzimbiri, komanso kuyanjana kwachilengedwe. Aloyiyi, yopangidwa ndi 6% aluminiyamu, 4% vanadium, ndi titaniyamu yoyenera, imawonetsa mawonekedwe osiyanasiyana amakina kutengera momwe amachitira komanso kutentha kwake. Kumvetsetsa zinthu izi ndikofunikira kwa mainjiniya ndi opanga omwe amagwira ntchito muzamlengalenga, zamankhwala, ndi ntchito zina zotsogola kwambiri. Cholemba ichi chabulogu chimasanthula zamakina a 6Al4V AMS 4928 Titanium Bar pansi pamikhalidwe yosiyanasiyana ndikuyankha mafunso wamba okhudzana ndi zinthu zosiyanasiyanazi.

Kodi chithandizo cha kutentha chimakhudza bwanji mphamvu ya 6Al4V AMS 4928 Titanium Bar?

Kuchiza kutentha kumagwira ntchito yofunika kwambiri pozindikira makina a 6Al4V AMS 4928 Titanium Bar. The aloyi akhoza pansi njira zosiyanasiyana kutentha mankhwala, aliyense kuchititsa microstructures osiyana ndipo, motero, osiyana makina katundu. Njira zochiritsira zotentha kwambiri za aloyiyi ndi monga annealing, solution kuchiza ndi kukalamba (STA), komanso beta annealing.

Annealing imachitika pa kutentha kwapakati pa 700 ° C ndi 850 ° C, kenako ndikuzizira pang'onopang'ono. Izi zimapangitsa kuti pakhale ductile zambiri zomwe zimakhala ndi makina abwino koma otsika mphamvu. Mkhalidwe wa annealed umagwiritsidwa ntchito nthawi zambiri pamene kukhazikika kumakhala kofunikira kuposa mphamvu.

Kuchiza ndi kukalamba (STA) ndi njira ziwiri zomwe zimathandizira kwambiri mphamvu ya alloy. Gawo loyamba limaphatikizapo kutenthetsa zinthuzo ku kutentha kozungulira 955 ° C, kuzigwira kwa nthawi yeniyeni, ndiyeno kuzimitsa mofulumira. Izi zimapanga supersaturated olimba njira. Gawo lachiwiri, kukalamba, kumachitika pa kutentha kochepa (nthawi zambiri pakati pa 480 ° C ndi 595 ° C) kwa maola angapo. Pa ukalamba, mpweya wabwino umapanga mkati mwa microstructure, zomwe zimapangitsa kuti zinthuzo zikhale zolimba.

Njira ya STA imatha kuonjezera mphamvu yomaliza (UTS) ya 6Al4V AMS 4928 Titanium Bar kuchokera kuzungulira 900 MPa muvuto la annealed kufika pa 1000 MPa. Mphamvu zokolola zimawonanso kusintha kwakukulu, nthawi zambiri kufika pamtengo woposa 900 MPa. Komabe, kuwonjezeka kwa mphamvu kumeneku kumabwera pamtengo wa ductility, ndi elongation nthawi zambiri imatsika kuchoka pa 14-16% mu chikhalidwe chokhazikika kufika 10-12% pambuyo pa chithandizo cha STA.

Beta annealing imaphatikizapo kutenthetsa aloyi pamwamba pa kutentha kwa beta transus (pafupifupi 995 ° C) ndiyeno kuziziritsa pamlingo wolamulidwa. Izi zitha kupangitsa kuti pakhale mawonekedwe ang'onoang'ono okhala ndi kutopa komanso kulimba kwapang'onopang'ono, zomwe zimapangitsa kuti zikhale zothandiza kwambiri pazamlengalenga pomwe pamakhala nkhawa.

Ndikofunikira kudziwa kuti zinthu zenizeni zomwe zimapezedwa kudzera mu chithandizo cha kutentha zimatha kusiyanasiyana malinga ndi kutentha, nthawi yogwira, komanso kuzizira komwe kumagwiritsidwa ntchito. Mainjiniya nthawi zambiri amagwira ntchito limodzi ndi akatswiri azinthu kuti akwaniritse njira yochizira kutentha pazomwe amafunikira.

Kodi kuzizira kumagwira ntchito bwanji pamakina a 6Al4V AMS 4928 Titanium Bar?

Cold ntchito ndi ndondomeko mapindikidwe pulasitiki ikuchitika pansipa recrystallization kutentha kwa zinthu. Pa 6Al4V AMS 4928 Titanium Bar, kugwira ntchito mozizira kumatha kusintha kwambiri makina ake, makamaka kudzera pakuwumitsidwa kwapang'onopang'ono komanso kuyambitsa kupsinjika kotsalira.

Mukagwiritsidwa ntchito mozizira, kachulukidwe kameneka mkati mwa titaniyamu aloyi amakula kwambiri. Ma dislocations amalumikizana wina ndi mnzake komanso zopinga zina pamapangidwe a kristalo, zomwe zimapangitsa kuti kusinthika kukhale kovuta. Zotsatira zake, mphamvu ya zokolola ndi kulimba komaliza kwa zinthu kumawonjezeka, nthawi zambiri kumakhala kokulirapo.

Mwachitsanzo, kuzizira pogwiritsa ntchito njira monga kugudubuza kozizira kapena kugwedezeka kungapangitse mphamvu yokolola ya anneal 6Al4V AMS 4928 Titanium Bar kuchokera kuzungulira 800 MPa kupita ku 1100 MPa, kutengera kuchuluka kwa ntchito yozizira. Mphamvu yayikulu kwambiri imathanso kuwonjezeka kuchokera pa 900 MPa kupita ku 1200 MPa.

Komabe, kuwonjezeka kwa mphamvu uku kumabwera pamtengo wa ductility. Kukula pakulephera kumachepa ndi kuzizira kowonjezereka, komwe kungathe kutsika kuchokera pa 14-16% mumkhalidwe wokhazikika mpaka kuchepera 8% pazinthu zozizira kwambiri. Kutsika kwa ductility kumeneku kungapangitse kuti zinthuzo zikhale zosavuta kusweka pang'onopang'ono pansi pazifukwa zina.

Kugwira ntchito mozizira kumadzetsanso kupsinjika kotsalira muzinthu. Ngakhale kupanikizika kumeneku nthawi zina kumakhala kopindulitsa (mwachitsanzo, kupanikizika kwa pamwamba kungapangitse moyo wotopa), kungayambitsenso kupotoza kapena khalidwe losayembekezereka panthawi yopangira zinthu kapena ntchito.

Ndizofunikira kudziwa kuti kuyankha kwa 6Al4V AMS 4928 Titanium Bar pogwira ntchito yozizira ndi anisotropic, kutanthauza kuti katunduyo amatha kusiyanasiyana kutengera komwe akugwirira ntchito. Anisotropy iyi iyenera kuganiziridwa pakupanga ndi kusankha zinthu.

Chinthu chinanso chofunikira ndi chakuti kugwira ntchito kozizira kungakhudze microstructure ya alloy. Kugwira ntchito kozizira kwambiri kungapangitse kusintha kwa gawo kuchokera ku gawo la alpha kupita ku gawo la metastable omega, lomwe lingakhale ndi tanthauzo lalikulu pazachuma komanso machitidwe.

Ngakhale kuzizira kugwira ntchito kungakhale njira yabwino yowonjezera mphamvu ya 6Al4V AMS 4928 Titanium Bar, nthawi zambiri amagwiritsidwa ntchito limodzi ndi machiritso a kutentha kuti akwaniritse bwino zinthu. Mwachitsanzo, kugwira ntchito kozizira kotsatiridwa ndi chithandizo cha kutentha kwapang'onopang'ono kumatha kuthandizira kukulitsa mphamvu ndikuchepetsa kupsinjika kotsalira ndikuwongolera kukhazikika kwa mawonekedwe.

Kodi zinthu zachilengedwe zimakhudza bwanji kutopa kwa 6Al4V AMS 4928 Titanium Bar?

Kutopa kwa 6Al4V AMS 4928 Titanium Bar ndikofunikira kwambiri pamapulogalamu ambiri, makamaka m'magawo amlengalenga ndi biomedical komwe zigawo zake zimayendetsedwa mozungulira. Ngakhale alloy iyi nthawi zambiri imawonetsa kukana kutopa kwambiri, zinthu zosiyanasiyana zachilengedwe zimatha kukhudza kwambiri magwiridwe ake anthawi yayitali pansi pa kupsinjika kwa cyclic.

Chimodzi mwazinthu zofunikira kwambiri zachilengedwe zomwe zimakhudza magwiridwe antchito ndi kukhalapo kwa media zowononga. Ngakhale 6Al4V AMS 4928 Titanium Bar imadziwika ndi kukana kwa dzimbiri, malo ena amatha kukhudzabe moyo wake wotopa. Mwachitsanzo, kukhudzana ndi madzi amchere kapena njira zina zokhala ndi chloride kungayambitse dzimbiri, zomwe zimapangitsa malo opanikizika omwe angayambitse kutopa. Kafukufuku wasonyeza kuti mphamvu ya kutopa ya alloy iyi ikhoza kuchepetsedwa mpaka 50% mu njira ya 3.5% ya NaCl poyerekeza ndi ntchito yake mumlengalenga.

Kutentha ndi chinthu china chofunikira kwambiri cha chilengedwe. Pa kutentha okwera, kutopa mphamvu 6Al4V AMS 4928 Titanium Bar kawirikawiri amachepetsa. Izi zimachitika chifukwa cha zinthu zingapo, kuphatikiza kuchuluka kwa makutidwe ndi okosijeni, kusintha kwa microstructure ya zinthuzo, komanso kuwonjezereka kwa kukula kwa crack. Mwachitsanzo, pa 300 ° C, mphamvu ya kutopa imatha kuchepetsedwa pafupifupi 30% poyerekeza ndi kutentha kwa chipinda. Mosiyana ndi zimenezi, kutentha kwa cryogenic, mphamvu ya kutopa imakhala bwino, koma zinthuzo zikhoza kukhala zosavuta kusweka.

Hydrogen embrittlement ndi nkhawa makamaka kwa titaniyamu alloys, kuphatikizapo 6Al4V AMS 4928. Kuwonekera kwa malo okhala ndi haidrojeni, omwe amatha kuchitika panthawi yopangira zinthu kapena ntchito, angayambitse kuyamwa kwa haidrojeni muzinthu. Hydrojeni wolowetsedwawa amatha kuchepetsa kwambiri kutopa kwa aloyiyo polimbikitsa mapangidwe ndi kukula kwa ming'alu yaying'ono. Ngakhale ma hydrogen ochepa (otsika mpaka 150 ppm) amatha kuchepetsa kutopa ndi 25%.

Mkhalidwe wapamtunda umagwira ntchito yofunika kwambiri pakutopa, ndipo zinthu zachilengedwe zimatha kukhudza izi. Mwachitsanzo, kukhudzana ndi tinthu tating'onoting'ono mumpweya kapena m'madzi kungayambitse kukokoloka kwa pamwamba, kupanga tinthu tating'onoting'ono tomwe timakhala ngati zolimbikitsa komanso zoyambitsa kutopa. Momwemonso, kuvala kovutitsa, komwe kumatha kuchitika ngati mawonekedwe awiri akuyenda pang'ono-amplitude, kumatha kuchepetsa moyo wotopa pazinthu zina.

Chikoka cha zinthu zachilengedwe pa ntchito kutopa nthawi zambiri synergistic. Mwachitsanzo, kuphatikiza kwa cyclic loading, kutentha kwapamwamba, ndi malo owononga kungayambitse kuchepa kwakukulu kwa moyo wotopa kusiyana ndi zonsezi zokha. Izi, zomwe zimadziwika kuti corrosion kutopa, ndizodetsa nkhawa kwambiri pamagwiritsidwe ambiri a 6Al4V AMS 4928 Titanium Bar.

Ndikofunika kuzindikira kuti chithandizo chapamwamba cha alloy chingachepetse kwambiri zina mwazotsatira zachilengedwe. Njira monga kupenyerera, zomwe zimabweretsa kupsinjika kotsalira pamtunda, kapena zokutira pamwamba zimatha kupititsa patsogolo kutopa m'malo ovuta. Kuonjezera apo, kulingalira koyenera kamangidwe, monga kupewa kupanikizika ndi kuonetsetsa chitetezo chokwanira kumadera ovuta, ndizofunikira kwambiri kukulitsa moyo wa kutopa kwa zigawo zopangidwa kuchokera ku alloy iyi.

Pomaliza, nthawi 6Al4V AMS 4928 Titanium Bar imapereka zinthu zabwino zamakina komanso kukana kutopa, magwiridwe ake amatha kukhudzidwa kwambiri ndi zinthu zachilengedwe. Kumvetsetsa zikoka izi ndikofunikira kwa mainjiniya ndi opanga kuti awonetsetse kudalirika kwanthawi yayitali komanso chitetezo chazigawo zopangidwa kuchokera ku aloyiyi, makamaka pamapulogalamu ofunikira omwe kulephera kungakhale ndi zotsatira zoopsa.

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Zothandizira:

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