Kukangana kochepa komanso kugwiritsa ntchito mphamvu pang'ono ndiye zabwino zomwe zimaperekedwa ndi zisindikizo za PTFE.Zisindikizo izi zitha kugwiritsidwa ntchito popanda zovuta komanso zowuma ...
Ngakhale kuti zinthu zake zochititsa chidwi koyera, osadzazidwa kapena namwali PTFE ndi osakwanira angapo wovuta kwambiri zomangamanga applications.In makamaka, ozizira ake otaya kapena zokwawa khalidwe linaletsa ntchito PTFE mu makina ntchito.Ngakhale kutentha kwa chipinda, PTFE imakhala ndi kusintha kwakukulu pakapita nthawi pamene imayikidwa pa katundu wopitirirabe. Komanso, namwali PTFE alibe mphamvu zolimba ndipo amavala mofulumira ngakhale kuti ali ndi coefficient of friction.Mu 1960's, kuwonjezera kwa fillers kunapezeka kuti onjezerani kuchuluka kwa zinthu zakuthupi, makamaka zokwawa komanso mavalidwe.Zodzaza zambiri zimakhala zokhazikika mpaka 400 ° C, kotero siziletsa kugwiritsa ntchito kutentha kwakukulu.Zolemba pansipa ndi zina zomwe zimadzaza ndi zinthu zambiri komanso momwe zimakhudzira thupi la PTFE pawiri.
Galasi CHIKWANGWANI
Ulusi wagalasi ndi chinthu chomwe chimagwiritsidwa ntchito nthawi zambiri chomwe chimakhala ndi zotsatira zabwino pakuyenda kwa PTFE, komwe kumachepetsedwa pakutentha komanso kutentha kwambiri.Imawonjezeranso kukana kuvala ndipo imapereka mphamvu yabwino yopondereza.Chowonjezera ichi ndi inert wamankhwala kupatula kukhalapo kwa hydrofluoric acid ndi maziko amphamvu.Zili ndi zotsatira zochepa pamagetsi.
Mpweya wa carbon ndi carbon-graphite
Mpweya umachepetsa kukwawa, umawonjezera kuuma ndikukweza matenthedwe a PTFE.Kuvala kukana kwamafuta odzazidwa ndi kaboni kumakhala bwino makamaka kuphatikiza ndi graphite.Mpweya ndi imodzi mwazodzaza zoziziritsa kukhosi kupatula m'malo okhala ndi oxidizing komwe galasi imachita bwino.Carbon imapereka mphamvu yamagetsi ku PTFE.PTFE wodzazidwa ndi mpweya ndi ambiri ntchito pneumatic kusindikiza applications.Compounds ndi mpweya osakaniza graphite ndi zipangizo zokondeka kwa sanali mafuta ntchito.
Mpweya wa carbon
Kuwonjezera kwa carbon fiber ku PTFE kumasintha makhalidwe ake mofanana ndi momwe galasi fiber imachitira.Imachepetsa kukwapula, imawonjezera kusinthasintha ndi compressive modulus ndikukweza kuuma.Kawirikawiri, mpweya wochepa wa carbon fiber kuposa galasi fiber umafunika kuti ukwaniritse zotsatira zomwezo.Chigawo cha kukula kwa matenthedwe chimatsitsidwa ndipo matenthedwe amatenthedwe ndi apamwamba kwa mankhwala a carbon fiber odzaza PTFE.Kuvala kumachepa ngati mbali za carbon fiber zathiridwa ndi madzi. Mpweya wa carbon umakhala wopanda mankhwala ndipo ukhoza kugwiritsidwa ntchito muzitsulo zolimba ndi hydrofluoric acid.
Graphite
Graphite ndi crystalline kusinthidwa kwapamwamba-kuyera kaboni.Graphite yodzazidwa ndi PTFE ili ndi imodzi mwama coefficients otsika kwambiri a kukangana chifukwa cha mikangano yotsika ya graphite.Imakhala ndi mavalidwe abwino kwambiri, makamaka polimbana ndi malo ofewa okwerera ndipo imawonetsa kuthekera konyamula katundu pamakompyuta othamanga kwambiri.Graphite ndi inert yomwe imathandiza kuti igwiritsidwe ntchito muzofalitsa zowononga.
Bronze
Bronze ndi chodzaza zitsulo chodziwika bwino.Zochuluka (40 mpaka 60 % ndi kulemera kwake) zamkuwa zimachepetsa kupunduka pansi pa katundu ndikukweza matenthedwe ndi magetsi a PTFE mankhwala.Makhalidwe awiriwa ndi opindulitsa ku mapulogalamu omwe gawo limayikidwa pa kutentha kwambiri.Bronze yodzazidwa ndi PTFE imapereka makhalidwe abwino kwambiri a extrusion kukana.Bronze ndi aloyi yamkuwa ndi malata ndipo imatha kugwidwa ndi mankhwala ena.Makutidwe ndi okosijeni amkuwa angapangitse kuti mbali yomalizidwa iwonongeke popanda kukhudza ubwino wa mankhwala.PTFE wodzazidwa ndi mkuwa amagwiritsidwa ntchito kwambiri muzitsulo za hydraulic rod ndi piston seal applications.
Molybdenum disulfide (MoS2)
Molybdenum disulphide imawonjezera kuuma ndi kuuma kwa PTFE ndikuchepetsa kukangana.Imakhala ndi mphamvu zochepa pamagetsi ake.Chemically, imakhala yosasunthika ndipo imasungunuka kokha mu oxidizing acids amphamvu.Amagwiritsidwa ntchito pang'onopang'ono kulemera kwake komanso kuphatikiza ndi zodzaza zina monga galasi fiber.
Polyester wonunkhira
Polyester onunkhira ngati chinthu chodzaza amakweza kukana kwa kutentha kwa PTFE ndipo ndi yabwino kwambiri kugwiritsidwa ntchito ndi malo ofewa, osunthika okwerera.
Zowonjezera zamtundu
Ndi zotheka kuti pigment PTFE pogwiritsa ntchito inorganic mtundu zina kuti kupirira sintering kutentha kwa PTFE.Nkhumba sizisintha kwambiri zinthu za PTFE.Kuphatikizika kwa inki ndi zodzaza zina ndizotheka.Zodzaza ndi zodzaza ndi zodzazaParker akuyesetsa mosalekeza kusaka ndikupanga zophatikizika zapadera kuti apititse patsogolo ntchito yosindikiza pamapulogalamu apamwamba kwambiri.
Nthawi yotumiza: Aug-16-2016