Mukamva 'mitundu ya sintering,' mabuku ambiri amalumphira molunjika ku gulu lodziwika bwino la solid-state vs. liquid-phase distinction. Ndi zabwino m'malingaliro, koma pamalo ogulitsira, kusankha kwa binary kumamveka ngati kupusa. Lingaliro lenileni ndi la messier, motsogozedwa ndi ufa wa alloy womwe mwakhala nawo m'mawa uja, gawo la geometry lomwe uinjiniya adangoponya pakhoma, komanso kukakamizidwa kosalekeza kochokera kukupanga kukagunda milingo ya kachulukidwe popanda kuwomba bajeti yamagetsi. Ndawonapo achinyamata ambiri akukonzekera kusankha mtundu 'woyenera' pa tchati, koma ng'anjoyo imangonena nkhani ina. Tiye tikambirane zimene zimachitikadi chitseko cha ng’anjo chikatsekedwa.
Solid-State Sintering: The Workhorse ndi Zobisika Zake Zobisika
Izi ndiye zokhazikika, zoyambira. Mukugwirizanitsa ufa pansi pa malo osungunuka a chinthu chachikulu, kudalira kufalikira kwa atomiki. Pazigawo zathu zambiri zachitsulo ku QSY, makamaka zigawo zosavuta zomangira kuchokera ku chitsulo kapena chitsulo chochepa cha alloy, apa ndipamene timayambira. Njirayi ikuwoneka yowongoka - kukweza, kugwira, kuziziritsa. Koma mdierekezi ali mwatsatanetsatane, makamaka mlengalenga kulamulira. Pezani kudontha kwakung'ono mung'anjo yanu yovunikira kapena chopukutira mu hydrogen / nitrogen mix, ndipo simungoyang'ana makutidwe ndi okosijeni. Mukusintha ma kinetics ophatikizika pazigawo za khosi pakati pa tinthu tating'onoting'ono, zomwe zimatsogolera ku zomangira zofooka ndi gawo lomwe lingalepheretse makina. Tinaphunzira izi movutikira zaka zapitazo pagulu la zida zopanda kanthu; kachulukidwe ka sintered kumawoneka bwino pa lipotilo, koma amalankhula ndikusweka panthawi yoyeserera. Wolakwa? Mpweya wotsekemera pang'ono womwe umapanga filimu yopyapyala, ya brittle oxide pamalire ambewu, osawoneka ndi macheke wamba.
Kutentha kwa kutentha ndikusintha kwina kwachete. Ma curve a mabuku ndi osalala. M'malo mwake, ngati muthamanga kwambiri ndi mawonekedwe ophatikizika, mutha kupanga zovuta zamkati zomwe zimayambitsa kutsika kwapang'onopang'ono kapena kupindika. Sikuti amangofikira kutentha konyowa; ndi momwe mumafikira kumeneko. Pamawonekedwe ovuta timayika makina a post-sintering, monga matupi ena azitsulo zosapanga dzimbiri omwe timawagwiritsa ntchito, njira yowongolera, yamasitepe ambiri ndi yosakanizika kuti ikhale yokhazikika pazotsatira za CNC.
Ndipo tisaiwale ufa wokhawokha. Lingaliro la 'pure' solid-state sintering limasokonekera ndi ufa wopangidwa kale. Ngakhale ndi zinthu monga faifi tambala kapena mkuwa mu ufa wachitsulo, mutha kupeza magawo amadzi am'deralo ngati malo otentha achitika. Chifukwa chake, mukufuna kukhala olimba, koma muyenera kudziwa kuti mutha kukopana ndi china chake. Ndi dera la imvi lomwe limalekanitsa chophika kuchokera ku njira yolimba.
Liquid Phase Sintering: Kumene Zinthu Zimakhala Zosangalatsa (ndi Zomata)
Tsopano apa ndipamene mumalowetsamo gawo laling'ono losungunuka. Chitsanzo chapamwamba ndikuwonjezera mkuwa kuchitsulo. Lingalirolo ndi lokongola: mawonekedwe amadzimadzi, amanyowetsa njere zolimba, ndipo kudzera mu capillary action ndi kuyanika kwamadzi, mumafika mwachangu. Zowona pamzere wopanga ndi nkhondo yosalekeza yolimbana ndi mphamvu yokoka ndi nthawi-kugwa. Ngati gawo la voliyumu yamadzimadzi ndilokwera kwambiri kapena kukhuthala kwake kutsika kwambiri, gawo lanu lopanikizidwa bwino limatha kugwa kapena kutaya mawonekedwe ake mung'anjo. Ndikukumbukira pulojekiti yokhala ndi kachulukidwe kakang'ono komwe tinali kukankhira zamkuwa. Tili ndi kachulukidwe, chabwino, koma gawolo linatuluka likuwoneka ngati kandulo yachisoni, yosungunuka. Tinayenera kuyimba kumbuyo, kuvomereza kutsika pang'ono koyambirira kuchokera kukanikiza, ndikugwiritsa ntchito mbiri yolondola kwambiri kuti tiwongolere nthawi yamadzimadzi.
Ngodya yonyowa ndiye chilichonse. Ngati madziwo sanyowetsa mbewu zolimba bwino, amamera m'mabowo m'malo mofalikira m'malire a tirigu. Mumamaliza ndi kudzipatula, pores zazikulu ndi mphamvu zopanda mphamvu. Izi sizinthu zasayansi zokha; imakhudzidwa ndi ma oxide a pamwamba, zonyansa zazing'ono, ndi mpweya wa ng'anjo. Kwa ma aloyi apadera omwe timagwira nawo ntchito, monga ena opangira faifi tambala, kusankha chothandizira cholondola ndi luso laumwini. Ndizochepa pakutsatira bukhu komanso zambiri zoyesa mobwerezabwereza, nthawi zambiri mogwirizana ndi ogulitsa ufa.
Ndiye pali microstructure. Ndi madzi gawo sintering, inu nthawi zambiri amasiyidwa ndi gulu gulu - zolimba njere zozunguliridwa ndi osiyana gawo. Izi zitha kukhala zabwino kukana kuvala kapena maginito ena, koma zimasintha kwambiri momwe makina amagwirira ntchito. Pamene gawo lathu la CNC pa Malingaliro a kampani Qingdao Qiangsenyuan Technology Co., Ltd. afika madzi gawo sintered mbali, ndi magawo Machining (liwiro, chakudya, chida kalasi) ayenera review wathunthu poyerekeza olimba-boma sintered mbali ya zinthu m'munsi chomwecho. Kulimba sikuli kofanana, ndipo machitidwe ovala zida sangadziwike ngati muwatenga ngati chidutswa chofanana.
Sintering-Assisted Sintering: The Density Game Changer
Nthawi zina, sintering wamba sangakufikitseni pamenepo, makamaka pakulimba kwathunthu kapena ndi zida zachinyengo monga zitsulo zowuma kapena zoumba zina. Ndiko komwe mumabweretsa mfuti zazikulu: kukakamizidwa. Hot Pressing (HP) ndi Hot Isostatic Pressing (HIP) ali mu ligi yosiyana. Sitigwiritsa ntchito magawo okwera kwambiri, otsika mtengo - nthawi yozungulira ndi zida zotsika mtengo. Koma kwa fanizo limodzi kapena gawo lofunikira mu aloyi yapadera, monga cobalt-based alloy chisindikizo cha malo ovuta kwambiri, HIP ndi yopulumutsa moyo.
Hot Isostatic Pressing ndiyosangalatsa. Mumayika gawo lobiriwira mu chitini chosindikizidwa, ndikuchichotsa, kenako ndikuchiyika pa kutentha kwakukulu komanso kuthamanga kwa mpweya wa isostatic (argon, kawirikawiri). Kupsyinjika kumagwera mkati pores kuchokera mbali zonse, zomwe zimatsogolera kufupikitsa kwambiri. Nsomba? Njira yowotchera ndikujambula. Kutayikira kulikonse, ndipo gasi amalowa, ndikuwononga gawolo. Ndipo kusintha kwa mawonekedwe ndikodziwikiratu kwambiri koma sikuti nthawi zonse kumakhala kocheperako kubweza pazida zoyambira. Tagwiritsanso ntchito HIP kukulitsa zida zopangira ndalama zambiri, zomwe zimapangitsa kuti pasakhale kusiyana pakati pa njira zachikhalidwe zopangira zitsulo ndi ufa.
Kuletsa kothandiza, kupitirira mtengo, ndi gawo la kukula kwake. Chilengedwe chanu chimatanthauzidwa ndi kutalika ndi kutalika kwa chotengera chanu cha HIP. Pazigawo zazikulu, mwabwereranso kukulimbana ndi sintering wamba ndi kusagwirizana kwake. Ndi chida, champhamvu kwambiri, koma osati yankho lachilengedwe chonse.
Spark Plasma Sintering ndi Njira Zina Zothandizira Pamunda
Izi ndizinthu zam'malire, zomwe nthawi zambiri zimangokhala ma lab a R&D kapena kupanga kwanthawi yayitali. Spark Plasma Sintering (SPS) kapena Field-Assisted Sintering Technique (FAST) imagwiritsa ntchito pulsed current ndi uniaxial pressure. Kugulitsa kwakukulu ndikuthamanga-kutentha kwachangu kwambiri komanso nthawi yochepa, yomwe ingathe kupondereza kukula kwa mbewu. Ndiwokongola kwa nanomatadium kapena kusunga mawonekedwe apadera a ufa.
Koma pakupanga, ndizovuta. Kukulitsa ndiye vuto lalikulu. Kupanga mawonekedwe akulu, ovuta mofanana ndi SPS ndizovuta zomwe tikuziwonerabe kumbali. Nkhani ina ndiyakuti kuzungulira kwachangu kwambiri nthawi zina kumatha kusiya kupsinjika kotsalira kapena kupanga kachulukidwe kachulukidwe ngati mapangidwe akufa ndi njira zapano sizili bwino. Kwa kampani ngati QSY, yomwe imayang'ana kwambiri popereka zida zodalirika komanso zopangidwa ndi makina, timayang'anitsitsa kupita patsogolo kumeneku. Zitha kukhala zofunikira pantchito yamtsogolo yokhudzana ndi ufa wa alloy, koma pakadali pano, akhalabe chida chapadera. Chofunikira kwambiri ndichakuti 'mtundu' wa kuimba si kusankha kokha; ndi cholepheretsa chomwe chimatanthauzidwa ndi zida zomwe muli nazo komanso kukula kwa batchi yachuma.
Chosaiwalika: Kuyimba Monga Gawo la Unyolo, Osati Chilumba
Iyi ndiye mfundo yofunika kwambiri kuyambira zaka 30 mubizinesi iyi. Simungathe kulekanitsa sitepe ya sintering. Kupambana kwake kapena kulephera kwake kumatsimikiziridwa ndi zomwe zimabwera patsogolo ndi pambuyo pake. Makhalidwe a ufa (kugawa kukula, morphology, lubricant) adayambitsa. Njira yophatikizira (uniaxial, isostatic, jekeseni wachitsulo) imatanthawuza kachulukidwe kobiriwira ndi kapangidwe ka pore komwe sintering imayenera kugwira ntchito.
Ndipo chofunika kwambiri, nchiyani chimabwera pambuyo pake? Ngati gawolo likupita molunjika kuntchito, sintering iyenera kupereka zinthu zomaliza. Koma ku QSY, magawo athu ambiri opangidwa ndi ufa amakumana ndi makina akuluakulu a CNC. Gawo losasunthika bwino likhoza kukhala lobisika pansi pa porosity kapena kuuma kosagwirizana, zomwe zingayambitse kusweka kwa zida, kusamalidwa bwino kwa pamwamba, ndi zidutswa zong'ambika pakupanga makina - kuwononga mtengo wonse womwe wawonjezeredwa mpaka pamenepo. Mbiri ya sintering iyenera kupangidwa poganizira za makina. Nthawi zina, ndikwabwino kuyika kachulukidwe kakang'ono kocheperako komwe kamakhala kofanana kwambiri, ndikumakina, ndiyeno gwiritsani ntchito opareshoni yachiwiri ngati chowotcha chocheperako kapenanso chithandizo chapamtunda kuti mugunde zomaliza.
Potsirizira pake, ng'anjoyo yokha ndi dongosolo lamoyo. Mzere wa refractory umawonongeka pakapita nthawi, zomwe zimakhudza kufanana kwa kutentha. Kutentha zinthu zaka. Ma thermocouples amasuntha. 'Mtundu' wa sintering si njira yokhazikika; ndi njira yamoyo yomwe imafuna kuyang'anitsitsa nthawi zonse ndikusintha. Ogwira ntchito bwino omwe ndimawadziwa amamva ng'anjo zawo - amawamvetsera, amawona mtundu wa ziwalo zomwe zikutuluka, ndikugwirizanitsa izo ndi zipika za deta. Ndi kaphatikizidwe ka sayansi, kachitidwe ka zida, komanso kumvetsetsa kwazinthu zonse zopanga zomwe zimasintha mawonekedwe a sintering kukhala odalirika, masana, kupanga tsiku lililonse. Ndizochepa posankha mtundu komanso zambiri zaluso zosinthika mumtundu womwe polojekiti yanu ikufuna.
