Mea Fa'ameafaigaluega Sima Carbide

O le fa'aopoopoina o le TaC (NbC) i le carbide sima ose auala aoga e fa'aleleia ai lona fa'atinoga. I u'amea TiC / Ni / Mo, sui vaega o le TiC i carbide pei o WC ma TaC, lea e ofoina atu le malosi sili atu, faʻaleleia le faʻatinoga o le carbide sima ma faʻalauteleina lona faʻaogaina. O le faʻaopoopoga o le WC ma le TaC e faʻaleleia ai:

● Malosi
● fa'a'au'au fa'alelei
● Tete'e i le palasitika deformation
● Malosi maualuga-vevela

E faʻaleleia ai foʻi le faʻaogaina o le vevela ma le faʻalavelave faʻafuaseʻi o le vevela, e sili atu ona talafeagai le meafaigaluega mo le faʻalavelave tipi. I WC-Co alloys, e mafai ona faʻaleleia le faʻatinoga e ala i le faʻaopopoina o le 0.5% i le 3% (vaega vaega) o carbide e pei o TaC, NbC, Cr3C2, VC, TiC, poʻo HfC. O sini autu e aofia ai:

● Faamamaina o saito
● Faʻamauina se fausaga tioata tutusa e aunoa ma le toe faʻafouina
● Faʻateleina le maʻaʻa ma faʻafefeteina e aunoa ma le faʻafefeina o le faigata

E le gata i lea, o nei faʻaopoopoga e faʻaleleia:

● Maaa maualuga-vevela
● Malosi maualuga-vevela
● Tete'e oxidation

I le taimi o le tipiina, e foliga mai se ata tifaga oxide faigata, e totogi e le tagata lava ia, lea e tetee atu i le pipii ma le faʻafefeteina pe a faʻaogaina ni uʻamea poʻo ni mea faʻapipiʻi. Ole mea lea e fa'aleleia ai le fa'aogaina ole mea faigaluega ma fa'ateleina lona malosi e tete'e ai le ofuina o le lua ma le fa'alavalava. O nei faʻamanuiaga e faʻateleina ona faʻaalia pe a faʻatupulaʻia le kobalt i totonu o le carbide sima.

● carbide sima ma le 1% i le 3% (vaega vaega) TaC (NbC) e mafai ona faʻaogaina uʻamea uʻamea eseese, e aofia ai le uʻamea faʻamalosi ma le uʻamea uʻamea.
● O mea faʻapipiʻi maualalo-cobalt e iai le 3% i le 10% (vaega vaega) TaC (NbC), e pei ole YG6A, YG8N, ma le YG813, e tele. E mafai ona latou faia:

Uamea malulu
u'amea lafo u'amea
Metala e le o ni u'amea
Mea fa'afaigata-i-masini e pei o u'amea u'amea, u'amea malo, ma u'amea vevela maualuga

O nei mea e masani ona taʻua o uʻamea faʻapitoa (YW). O le faʻateleina o le cobalt e talafeagai ona faʻaleleia ai le malosi ma le maʻaʻaʻa o lenei ituaiga carbide sima, e talafeagai ai mo le faʻaogaina o masini ma faʻalavelaveina le tipiina o mea faigata i le masini. O talosaga e aofia ai:

● Fa'apa'u pa'u u'amea tetele ma fa'amea
● Liliu, fa'ata'atia, ma viliina o u'amea austenitic ma u'amea fa'afefete
● Fa'ali'i ma tulimanu lapopo'a rake, vaega tipi lapopo'a, ma saosaoa feololo i le maualalo
● Fa'asao le kiina o masini la'u otometi, semi-automai, ma le tele o meafaigaluega
● Fa'ata'ita'iga fa'ameamea, mea fa'apipi'i, ma isi mea faigaluega e maualuga lona malosi**

I WC-TiC-Co alloys, o le tele o mea o lo'o i totonu o le TiC e fa'atuputeleina ai le ma'ale'ale i le ta'e o le vevela, e o'o atu ai i le sili atu o le pala. O le fa'aopoopoina o le TaC i le maualalo-TiC, maualuga-cobalt WC-Ti-Co alloy e fa'aleleia atili ai:

● Malosi
● Tete'e vevela
● Tete'e oxidation

Aʻo faʻaitiitia e le TiC le teteʻe o le vevela, e totogi e le TaC lenei mea, e faʻaogaina ai le uʻamea mo galuega viliina. O isi mea taugofie e pei o NbC poʻo Hf-Nb carbides (vaega vaega: Hf-60%, Nb-40%) e mafai ona suitulaga mo TaC. I alloys TiC-Ni-Mo, faʻaopoopoina TiN, WC, ma TaC i le taimi e tasi e faʻaleleia atili ai:

● Malosi
● Malosi felagolagomai
● Tete'e oxidation
● Fa'avevela vevela

i le vevela maualuga (900–1000°C).