HSS ke eng?

High-speed steel (HSS) esale e le tekanyetso ea lisebelisoa tsa ho seha tšepe ho tloha lilemong tsa bo-1830.

High-speed steel (HSS) ke sesebelisoa sa tšepe se thata haholo, se hanyetsanang le mocheso o phahameng le mocheso o phahameng. E boetse e bitsoa tšepe e bohale, e bolelang hore e ka thatafala le ho lula e le bohale esita le ha e pholile moeeng nakong ea ho tima.

Litšepe tse lebelo le phahameng li na le karolo e phahameng ea khabone le litšepe tse ling. Ha ho nahanoa hore sebopeho ke tšobotsi ea bohlokoahali ea tšepe ea lebelo le phahameng, HSS e na le tungsten, molybdenum, chromium, vanadium, cobalt, le likarolo tse ling tse etsang carbide ka kakaretso ea likarolo tse ka bang 10 ho isa ho tse 25% tsa motsoako. Liqapi tsena li fana ka HSS ka thepa ea khale ea ho itšeha le ea mochini joalo ka ho hanyetsa ho roala. Boemong ba ho tima, tšepe, chromium, s    ome tungsten, le k'habone e ngata ka har'a tšepe ea lebelo le holimo li etsa li-carbides tse thata haholo tse ka ntlafatsang ho sebetsa ha tšepe.

Ho feta moo, HSS e tsejoa e na le boima bo phahameng bo chesang. Sena ke hobane tungsten e qhibiliha ka har'a matrix. Boima bo chesang ba tšepe ea lebelo le phahameng bo ka fihla likhato tse 650. Tungsten, molybdenum, chromium, vanadium, cobalt, le li-carbide tse ling li na le likarolo tse thusang ho boloka boima bo phahameng ho itšeha mocheso o phahameng (hoo e ka bang 500 ° C).

Ho bapisa HSS le litšepe tsa lisebelisoa tsa carbon ho ka tseba hore na ke life tse nang le boima bo phahameng mochesong oa kamore ka mor'a ho tima le ho halefa ka mocheso o tlase. Empa ha mocheso o phahame ho feta 200 ° C, ho thatafala ha tšepe ea carbon tool ho tla theoha haholo. Ho feta moo, boima ba litšepe tsa lisebelisoa tsa carbon ka 500 ° C bo tla theohela boemong bo tšoanang le ba boemo ba eona bo hanetsoeng, ho bolelang hore bokhoni ba eona ba ho khaola tšepe bo lahlehile ka ho feletseng. Ketsahalo ena e fokotsa tšebeliso ea lisebelisoa tsa carbon tool lithulusing tsa ho itšeha. Litšepe tse lebelo le phahameng li etsa mefokolo ea bohlokoa ea lisebelisoa tsa carbon ka lebaka la ho thatafala ha tsona ho chesang.

Carbide e entsoeng ka samente e phahametse HSS maemong a mangata. Haeba u thahasella lihlahisoa tsa tungsten carbide 'me u batla boitsebiso bo eketsehileng le lintlha tse ling, u ka RE THUTA ka mohala kapa ka poso ka ho le letšehali kapa U RE romele MAIL botlaaseng ba leqephe. Re labalabela ho botsa.