Mmetụta ọgwụgwọ cryogenic na microstructure nke carbide cimented

Usoro cryogenic dị iche iche na-eme ka mgbanwe na njirimara nkecemented carbide, na mgbanwe nke akụrụngwa nwere njikọ chiri anya na mmalite nke microstructure ya.Ya mere, ọ dị mkpa iji nyochaa mmetụta nke ọgwụgwọ cryogenic na microstructure nke carbide cimented.

The ahụkarị microstructure nke WC-Co cemented carbide bụ dị ka ndị a: a na-adọ – WC (ike frasi);β-adọ - Co (nkebi nkebi);y nkeji - (TaC, TiC, NbC, WC) equicubic lattice agwakọta carbide;usoro nke decarburized eta (CoW, C, Co.W.C).Gill et al.nyere eserese schematic nke usoro a na β, dị ka egosiri na eserese 6. N'ime ha, α-phase-WC (ike siri ike) na-etinye akụkụ bụ isi na mpaghara ahụ.ihe carbide cimentedn'ụdị ọkpụkpụ siri ike, ebe β-phase-Co (binder phase) jikọtara ya na tungsten carbide (WC) dị ka grid.

Mgbe a na-eme ka carbide simenti dị jụụ mgbe ọ gbasasịrị, ebe ọ bụ na agbazere nnukwu W na C na Co, usoro okpomọkụ dị elu α-Co na ụlọ okpomọkụ ka dị n'ụzọ kwụ ọtọ.Mgbe okpomọkụ na-aga n'ihu na-ebelata, mgbanwe nke martensitic site na cubic α-Co nke nwere ihu na-emechi na hexagonal ε-Co na-eme na usoro njikọ -Co.Enwere ike ịhụ na mgbe okpomọkụ na-agbanwe, enwere mgbanwe na microstructure nkecemented carbide, nke na-enye ohere maka ọgwụgwọ cryogenic iji kwalite mgbanwe mgbanwe nkecemented carbide.Ọtụtụ ọmụmụ lekwasịrị anya na mgbanwe na microstructure nkecemented carbidetupu na mgbe ọgwụgwọ cryogenic ma nyochaa usoro evolushọn microscopic mgbe ihe macroscopic gbanwere.