Mu kudula zitsulo, chida chodulira nthawi zonse chimatchedwa mano opanga mafakitale, ndipo kudulidwa kwa zida zodulira ndi chimodzi mwazinthu zazikulu zomwe zimatsimikizira kupanga kwake, mtengo wopangira ndi kuwongolera. Chifukwa chake, kusankha kolondola kwa zida zodulira ndikofunikira.
Chida chachitsulo chimatanthawuza zamtundu wa gawo lodula la chida.
Makamaka, kusankha koyenera kwa zida kumakhudza zinthu izi:
Kuchuluka kwa makina, kukhazikika kwa zida, kugwiritsa ntchito zida ndi mtengo wamakina, kulondola kwa makina ndi mawonekedwe apamwamba.
Ambiri amakhulupirira kuti zida zida monga carbon chida zitsulo, aloyi chida zitsulo, mkulu-liwiro aloyi, zoumba, cermets, diamondi, kiyubiki boron nitride, etc.
Cermet ndi zinthu zophatikizika
Cermet
Cermet English mawu akuti cermet kapena ceramet amapangidwa ndi ceramic (ceramic) ndi zitsulo (zitsulo). Cermet ndi mtundu wazinthu zophatikizika, ndipo tanthauzo lake ndi losiyana pang'ono munthawi zosiyanasiyana.
(1) Zina zimatanthauzidwa ngati zinthu zopangidwa ndi zitsulo zadothi ndi zitsulo, kapena zitsulo zopangidwa ndi zitsulo zopangidwa ndi ufa.
American ASTM Professional Committee imatanthauzira ngati: chinthu chophatikizika chopangidwa ndi chitsulo kapena aloyi ndi gawo limodzi kapena zingapo za ceramic, chomaliza chomwe chimakhala pafupifupi 15% mpaka 85% gawo la voliyumu, ndi kutentha kokonzekera, Kusungunuka pakati pa zitsulo ndi ceramic magawo ndi pang'ono.
Zida zopangidwa ndi zitsulo ndi zopangira za ceramic zili ndi ubwino wina wa zitsulo ndi zitsulo, monga kulimba ndi kupindika kukana zakale, ndi kukana kutentha kwakukulu, mphamvu zambiri ndi kukana kwa okosijeni komaliza.
(2) Cermet ndi carbide yokhala ndi simenti yokhala ndi titaniyamu yolimba tinthu tating'onoting'ono monga thupi lalikulu. Dzina lachingerezi la cermet, cermet, ndi kuphatikiza kwa mawu awiri a ceramic (ceramic) ndi zitsulo (zitsulo). Ti(C,N) imawonjezera kukana kwa kalasi, gawo lachiwiri lolimba limawonjezera kukana kusinthika kwa pulasitiki, ndipo zomwe zili mu cobalt zimawongolera kulimba. Ma Cermets amawonjezera kukana komanso kuchepetsa chizolowezi chomamatira ku workpiece poyerekeza ndi sintered carbide.
Kumbali inayi, ilinso ndi mphamvu zochepa zopondereza komanso kukana kwamphamvu kwamafuta. Ma Cermets ndi osiyana ndi ma alloys olimba chifukwa zida zawo zolimba ndi za WC system. Ma Cermets amapangidwa makamaka ndi Ti-based carbides ndi nitrides, ndipo amatchedwanso Ti-based cemented carbides.
Ma cermets ophatikizika amaphatikizanso ma aloyi amtundu wa refractory, ma aloyi olimba, ndi zida zachitsulo za diamondi. Gawo la ceramic mu cermets ndi oxide kapena refractory pawiri yokhala ndi malo osungunuka kwambiri komanso kuuma kwakukulu, ndipo gawo lachitsulo makamaka ndi zinthu zosinthira ndi ma aloyi awo.
Cermet ndi mtundu wazinthu zophatikizika, ndipo tanthauzo lake ndi losiyana pang'ono munthawi zosiyanasiyana.
Cermets ndi zida zodulira zitsulo
zinthu zofunika
Ma Cermet akuwonjezeredwa
Amakhulupirira kuti zida za zida zikuphatikizapo zitsulo za carbon, alloy tool steel, zitsulo zothamanga kwambiri, carbide cemented, cermet, ceramics, diamondi, kiyubiki boron nitride, etc.
M'zaka za m'ma 1950, ma cermets a TiC-Mo-Ni adayamba kugwiritsidwa ntchito ngati zida zodulira zitsulo mwachangu kwambiri.
Poyamba ma cermets adapangidwa kuchokera ku TiC ndi faifi tambala. Ngakhale ili ndi mphamvu zambiri komanso kuuma kwakukulu koyerekeza ndi simenti ya carbide, kulimba kwake kumakhala kocheperako.
M'zaka za m'ma 1970, ma cermets opangidwa ndi TiC-TiN, ma cermet opanda nickel adapangidwa.
Cermet yamakono iyi, yokhala ndi titaniyamu carbonitride Ti (C, N) particles monga chigawo chachikulu, pang'ono gawo lachiwiri lolimba (Ti, Nb, W) (C, N) ndi tungsten-cobalt-rich binder, imathandizira zitsulo. kulimba kwa ziwiya zadothi kunathandizira ntchito yawo yodula, ndipo kuyambira pamenepo ma cermet akhala akugwiritsidwa ntchito kwambiri popanga zida.
Ndi kukana kwambiri kutentha, kukana kuvala ndi kukhazikika kwa mankhwala, zida za cermet zasonyeza ubwino wosayerekezeka m'munda wa kudula kwachangu ndi kudula zipangizo zovuta makina.
Cermet + PVD zokutira zimathandizira kukana kuvala
m'tsogolo
Kugwiritsa ntchito mipeni ya cermet m'magawo osiyanasiyana kukuchulukirachulukira tsiku ndi tsiku, ndipo palibe kukayika kuti makampani opanga zinthu za cermet apititsidwa patsogolo.
Ma Cermets amathanso kuphimbidwa ndi PVD kuti azitha kukana kuvala bwino.
Nthawi yotumiza: Feb-08-2023
