Cemented carbide sintering process inoyerera

Kuridza kwesimende carbideis liquid phase sintering, kureva kuti, inoitwa pasi pemamiriro ekuti chikamu chekubatanidza chiri muchikamu chemvura.Iyo compact inopisa kusvika 1350C-1600C muvira rekutsvaira.Iyo mutsara shrinkage ye compact panguva yekunyura inenge 18%, uye vhoriyamu shrinkage ingangoita 50%.Iyo chaiyo shrinkage inoenderana nekukura kweiyo tungsten carbide poda uye kuumbwa kweiyosimende carbide.

Kuridza kwesimende carbideinzira yakaoma yemuviri nemakemikari, inosanganisira kubvisa plasticizer, degassing, solid phase sintering, liquid phase sintering, alloying, densification, dissolution uye kunaya kwemvura, nezvimwewo pasi pemamiriro ekuita sintering.Aya maitiro maitiro anosiyana zvakanyanya zvichienderana neakasiyana sintering zvishandiso.

Carbidevacuum sintering inzira yekuisa pasi pasi pe1atm (1atm=101325Pa).Sintering pasi pevacuum mamiriro ekudzikisira zvakanyanya kudzivirirwa kwe densification ne adsorbed gasi pahupfu uye gasi mumapores akavharika, ayo anobatsira pakupararira uye densification, uye inodzivirira kuita pakati pesimbi nezvimwe zvinhu mumhepo panguva yekupisa.Inogona kuvandudza zvakanyanya kunyorova kwechikamu chekubatanidza kwemvura uye chikamu chakaoma, asi kutarisirwa kunofanirwa kutorwa kudzivirira kurasikirwa kwekubuda kwecobalt panguva yekutsvaira sintering.Vacuum sintering inogona kukamurwa kuita nhanho ina, dzinoti plasticizer yekubvisa nhanho, pre-sintering nhanho,tungsten carbidehigh-temperature sintering stage, uye kutonhora nhanho.