Izici zeMilling Cutters
Uma usebenzisana nezinto ezinzima zomshini ezifana ne-Hastelloy, i-waspaloy, i-Inconel ne-Kovar, ulwazi lomshini nolwazi kubaluleke kakhulu. Njengamanje, kukhona ukusetshenziswa okwengeziwe kwama-alloys asekelwe ku-nickel, ikakhulukazi asetshenziselwa ukukhiqiza izingxenye ezithile ezibalulekile ku-aerospace, izimboni zezokwelapha kanye namakhemikhali. Lezi zinto zinamandla aphezulu, ukumelana nokugqwala, futhi zingamelana namazinga okushisa aphakeme kakhulu. Ezinye izakhi ezikhethekile zengezwa ezintweni ezingenhla ukuze kutholwe ukusebenza okuphezulu. Nokho, ngakolunye uhlangothi, lezi zinto nazo ziba nzima kakhulu ukuzigaya.
Siyazi ukuthi i-nickel ne-chromium izithasiselo ezimbili eziyinhloko kuma-alloys asekelwe ku-nickel. Ukwengeza i-nickel kungakhuphula ukuqina kwento, ukwengeza i-chromium kungathuthukisa ubulukhuni bento, futhi ukulingana kwezinye izingxenye kungasetshenziswa ukubikezela ukuguga kwethuluzi. Ezinye izakhi ezingezwe ezintweni zingabandakanya: i-silicon, i-manganese, i-molybdenum, i-tantalum, i-tungsten, njll. Kuyaphawuleka ukuthi i-tantalum ne-tungsten nazo ziyizingxenye eziyinhloko ezisetshenziselwa ukwenza i-carbide enosimende, engathuthukisa ngokuphumelelayo ukusebenza kwe-carbide enosimende , kodwa ukwengezwa kwalezi zakhi ku-workpiece material kwenza kube nzima ukugaya, cishe njengokusika ithuluzi elilodwa le-carbide nelinye.
Kungani abasiki bokugaya besika ezinye izinto zokwakha bephuka ngokushesha lapho begaya ama-alloys asekelwe ku-nickel? Kubalulekile ukukuqonda lokhu. Ukwenza ama-alloys asekelwe ku-nickel, izindleko zamathuluzi ziphezulu, futhi izindleko ziphindwe izikhathi ezi-5 kuya kweziyi-10 kunezokugaya insimbi evamile.
Akudingeki ukuthi, ukushisa kuyisici esibaluleke kakhulu esithinta impilo yamathuluzi lapho kugaya ama-alloys asekelwe ku-nickel, ngoba ngisho namathuluzi angcono kakhulu e-carbide angabhujiswa ngokusika ngokweqile ukushisa. Ukukhiqizwa kokushisa okuphezulu kakhulu akuyona nje inkinga yokugaya i-nickel alloys. Ngakho lapho ugaywa lawa ma-alloys, ukushisa kudinga ukulawulwa. Ngaphezu kwalokho, kubaluleke kakhulu ukwazi inani lokushisa elikhiqizwa lapho kwenziwa imishini ngezinhlobo ezihlukahlukene zamathuluzi (amathuluzi ensimbi anesivinini esikhulu, amathuluzi e-carbide noma amathuluzi e-ceramic).
Ukulimala kwamathuluzi amaningi nakho kuhlobene nezinye izici, futhi ukulungiswa okusezingeni eliphansi kanye nabaphathi bamathuluzi kungafinyeza impilo yamathuluzi. Uma ukuqina kocwecwe lokusebenza oluboshwe kunganele futhi ukunyakaza kwenzeka ngesikhathi sokusika, kungase kubangele ukuphuka kwe-matrix ye-carbide enosimende. Ngezinye izikhathi imifantu emincane ikhula ngasemaphethelweni okusika, futhi ngezinye izikhathi ucezu lunqamula i-carbide insert, okwenza kube nzima ukuqhubeka nokusika. Vele, lokhu kuqoshwa kungabangelwa futhi i-carbide eqinile noma umthwalo omningi wokusika. Ngalesi sikhathi, amathuluzi ensimbi anesivinini esikhulu kufanele acatshangelwe ukuze acutshungulwe ukuze kuncishiswe ukwenzeka kokuchopha. Yiqiniso, amathuluzi ensimbi anesivinini esikhulu awakwazi ukumelana nokushisa okuphezulu njenge-carbide enosimende. Iyiphi ngempela into okufanele isetshenziswe okufanele inqunywe ngokwesisekelo secala ngalinye.