Iyini i-HSS?

Insimbi enesivinini esikhulu (HSS) bekuyindinganiso yamathuluzi okusika insimbi kusukela ngeminyaka yawo-1830s.

I-High-speed steel (HSS) iyinsimbi yethuluzi enokuqina okuphezulu, ukumelana nokugqokwa okuphezulu, nokumelana nokushisa okuphezulu. Ibizwa nangokuthi insimbi ecijile, okusho ukuthi ingakwazi ukuqina futhi ihlale ibukhali ngisho nalapho ipholile emoyeni ngesikhathi sokucisha.

Insimbi enesivinini esikhulu iqukethe iphesenti eliphezulu lekhabhoni nezinye izinsimbi. Uma kucatshangelwa ukuthi ukwakheka kuyisici esibaluleke kakhulu sensimbi enesivinini esikhulu, i-HSS iqukethe i-tungsten, i-molybdenum, i-chromium, i-vanadium, i-cobalt, nezinye izakhi zokwakha i-carbide enani eliphelele lezinto eziyi-alloying ezingaba ngu-10 kuya ku-25%. Lezi zingoma zinikeza i-HSS ngezinto zakudala zokusika nezomshini ezifana nokumelana nokugqokwa. Esimeni sokucisha, i-iron, i-chromium, i-s    ome tungsten, kanye nenani elikhulu lekhabhoni kunsimbi yesivinini esikhulu kwenza ama-carbides aqine kakhulu angathuthukisa ukumelana nokugqokwa kwensimbi.

Ngaphezu kwalokho, i-HSS yaziwa ngokuba nobulukhuni obuphezulu bokushisa. Lokhu kungenxa yokuthi i-tungsten incibilika ku-matrix. Ukuqina okushisayo kwensimbi enesivinini esikhulu bungafinyelela ku-650 degrees. I-Tungsten, i-molybdenum, i-chromium, i-vanadium, i-cobalt, namanye ama-carbides aqukethe izakhi ezisiza ukugcina ubulukhuni obuphezulu ekusikeni izinga lokushisa eliphezulu (cishe u-500°C).

Ukuqhathanisa i-HSS nezinsimbi zamathuluzi ekhabhoni zingakwazi ukwazi ukuthi iziphi ezinobunzima obuphakeme ekamelweni lokushisa ngemva kokucishwa nokubanda emazingeni okushisa aphansi. Kodwa uma izinga lokushisa lingaphezu kuka-200°C, ubulukhuni bensimbi yensimbi ye-carbon buzokwehla kakhulu. Ngaphezu kwalokho, ubulukhuni bensimbi yensimbi ye-carbon ku-500 ° C buzokwehla bufinyelele ezingeni elifana nelesimo saso esine-annealed, okusho ukuthi ikhono layo lokusika insimbi lilahlekile ngokuphelele. Lesi simo sikhawulela ukusetshenziswa kwezinsimbi ze-carbon thuluzi kumathuluzi okusika. Izinsimbi ezinesivinini esikhulu zenza ukushiyeka okubalulekile kwezinsimbi zensimbi ye-carbon ngenxa yokuqina kwazo okuhle okushisayo.

I-carbide enosimende iphakeme kune-HSS ezimweni eziningi. Uma unentshisekelo emikhiqizweni ye-tungsten carbide futhi ufuna ulwazi olwengeziwe nemininingwane, UNGATHI XHUMANA NATHI ngocingo noma nge-imeyili kwesokunxele noma SITHUMELE IMEYILI ezansi nekhasi. Sibheke ngabomvu umbuzo wakho.