Yakasiyana cryogenic maitiro anokonzera shanduko muzvinhu zvesimende carbide, uye shanduko yezvivakwa inoenderana zvakanyanya nekushanduka kweiyo microstructure yayo.Naizvozvo, zvinodikanwa kuti uwedzere kuongorora maitiro ekurapa cryogenic pane microstructure yecemented carbide.
Iyo yakajairika microstructure yeWC-Co cemented carbide ndeyotevera: chikamu - WC (yakaoma chikamu);β chikamu - Co (binder chikamu);y chikamu - (TaC, TiC, NbC, WC) equicubic lattice yakasanganiswa carbides;eta phase-decarburized phase (CoW, C, Co. W. C).Gill et al.akapa dhiyabhorosi dhiyagiramu yea uye β phases, sezvakaratidzwa muMufananidzo 6. Pakati pavo, α phase-WC (yakaoma chikamu) inotora chikamu chikuru musimende ye carbide zvinhumuchimiro cheskeleton yakaoma, nepo β phase-Co (binder phase) yakanyatsobatanidzwa ne tungsten carbide (WC) segridi.
Kana iyo simende carbide yatonhodzwa mushure mekunyunguduka, sezvo huwandu hukuru hweW neC hunonyungudika muCo, chikamu chepamusoro-tembiricha α-Co pakudziya kwekamuri chichiripo chakasimba.Kana tembiricha ikaramba ichidzikira, iyo martensitic chikamu shanduko kubva kuchiso-chepakati cubic α-Co kuenda pakuvhara-yakazara hexagonal ε-Co inoitika muchikamu chekubatanidza -Co.Zvinogona kuonekwa kuti kana tembiricha ichichinja, pane shanduko mune microstructure yesimende carbide, iyo inopa mukana wekurapa cryogenic kukurudzira shanduko yechikamu chesimende carbide.Zvidzidzo zvakawanda zvakatarisa pane shanduko mune microstructure yesimende carbideisati yasvika uye mushure mekurapa cryogenic uye yakaongorora iyo microscopic evolution mechanism apo macroscopic properties anochinja.
Nguva yekutumira: Mar-06-2024
