Inqubo Yokwelapha Yezinga Lokushisa Eliphezulu Yama-Hard Alloys Asetshenzisiwe

Ukwelashwa okunokushisa okuphezulu kwama-alloys aqinile kwenziwa esithandweni somlilo esilungiselelwe ngokukhethekile. Ama-alloys kadoti angaphansi kokucutshungulwa kwezinga lokushisa eliphezulu ngaphezu kuka-1800 ℃ endaweni evikelayo yegesi. Phakathi nale nqubo, i-cobalt esetshenziswa njenge-binder metal iyancibilika futhi ibile, ibangele ukuthi i-alloy iphenduke futhi umthamo wayo ukhule kakhulu. Isakhiwo sengxubevange siba yizimbotshana futhi sifane nekhekheba lezinyosi, okwenza ingxubevange eqinile ibe lula kakhulu ukuphuka nokuyicubungula. Ngesikhathi sokwelashwa okunokushisa okuphezulu, inani elikhulu lesigaba se-liquid livela ku-alloy, liqinisa ukusakazeka kwama-athomu futhi lithuthukise ukuhlakazeka kanye nemvula ye-WC. Izinhlamvu ze-WC zikhula ngokushesha, zikhula zisuka ku-1 ziye ku-2 μm ziye emashumini noma ngisho namakhulu ama-micrometer. Ngaphezu kwalokho, ngesikhathi sokwenziwa kabusha kwe-WC, amaphutha esakhiweni sokusanhlamvu ayaqedwa, futhi ukwakheka kwekristalu ye-WC kuba okuphelele. Ngesikhathi esifanayo, amanani okulandela ezinye izinsimbi, ukungcola okungezona ezensimbi, nokungcola okuyingozi okwakuqukethwe ekuqaleni ku-alloy kuyasuswa.

Ubukhulu bokusanhlamvu be-alloy bukhula ngokushesha ngokunyuka kwezinga lokushisa lokushisa eliphezulu. Kodwa-ke, lapho izinga lokushisa lokwelashwa lihlala njalo, ukunwetshwa kwesikhathi sokwelashwa akunawo umthelela omkhulu ekwandeni kosayizi wezinhlamvu ze-alloy. Usayizi wokusanhlamvu we-alloy uyashintsha ngezinga lokushisa lokwelapha kanye nesikhathi sokubamba ngemva kokwelashwa kwezinga lokushisa eliphezulu. Isihluthulelo sokulawula inqubo yokwelashwa kwezinga lokushisa eliphezulu ukulawula izinga lokushisa lokwelapha. Kodwa izinga lokushisa lokwelashwa akusho ukuthi liphakeme kakhulu. Uma izinga lokushisa lokwelapha liphezulu kakhulu, lizoqala lithinte impilo yesevisi yemishini yokushisa ephezulu; okwesibili, kuzodala isigaba se-liquid esiningi kakhulu ku-alloy, ukwanda kwe-volatilization yesigaba se-Co, ukuwa kwe-WC skeleton, nokwenza i-alloy ihlanganise ne-crucible, okwenza kube nzima ukuhlanza nokuphuka. Ngokuvamile, inqubo yokwelapha eshisa kakhulu ilawulwa cishe ku-2000 ℃, futhi kuyalulekwa ukubamba amahora ama-2.