Tloo ho utloisisa tšepe ea lebelo le holimo
High-speed steel (HSS) ke sesebelisoa sa tšepe se nang le boima bo phahameng, khanyetso e phahameng ea ho apara le mocheso o phahameng oa mocheso, o tsejoang hape e le tšepe ea moea kapa tšepe e ka pele, e bolelang hore e ka thatafalloa le ha e pholile moeeng nakong ea ho tima, le e bohale haholo. E boetse e bitsoa tšepe e tšoeu.
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Tšepe ea lebelo le phahameng ke tšepe ea motsoako e nang le motsoako o rarahaneng, o nang le lintho tse etsang carbide tse kang tungsten, molybdenum, chromium, vanadium le cobalt. Kakaretso ea likarolo tsa alloying ke hoo e ka bang 10-25%. E ntse e ka boloka boima bo phahameng tlas'a boemo ba mocheso o phahameng o hlahisoang ke ho itšeha ka lebelo le phahameng (hoo e ka bang 500 ℃), 'me HRC ea eona e ka ba ka holimo ho 60. Ena ke tšobotsi ea bohlokoa ka ho fetisisa ea tšepe e phahameng - boima bo bofubelu. Kamora ho tima le mocheso o tlase oa mocheso, tšepe ea sesebelisoa sa carbon e na le boima bo phahameng mochesong oa kamore, empa ha mocheso o phahame ho feta 200 ° C, boima bo theoha haholo, 'me boima bo theohile ho fihlela boemong bo tšoanang le ba boemo ba annealed. 500°C. , E lahlehetsoe ka ho feletseng ke bokhoni ba ho khaola tšepe, e fokotsang tšebeliso ea tšepe ea carbon tool bakeng sa ho itšeha lisebelisoa. Tšepe ea lebelo le phahameng e etsa hore ho be le mefokolo e bolaeang ea tšepe ea sesebelisoa sa carbon ka lebaka la boima ba eona bo bofubelu bo botle.
Litšepe tse lebelo le phahameng li sebelisoa haholo ho etsa lisebelisoa tse thata tse tšesaane le lisebelisoa tsa ho itšeha tse hananang le tšusumetso, hammoho le li-bearings tse nang le mocheso o phahameng le mocheso o batang, joalo ka lithulusi tse phethohang, likotoana tsa ho cheka, li-hobs, li-blades tsa mochini le hlobo e boima.
▌ Ha re ithute ka tšepe ea tungsten
Tungsten steel (tungsten carbide) e na le letoto la thepa e babatsehang e kang boima bo phahameng, ho hanyetsa ho roala, matla a matle le boima, ho hanyetsa mocheso le ho hanyetsa kutu, haholo-holo boima ba eona bo phahameng le ho apara ho hanyetsa, esita le mocheso oa 500 ° C. E ntse e le teng. ha e le hantle ha e fetohe, 'me e ntse e na le boima bo phahameng ho 1000 °C.
Tungsten tšepe, likarolo tse ka sehloohong ke tungsten carbide le cobalt, e ikarabellang bakeng sa 99% ea likarolo tsohle, 'me 1% ke lisebelisoa tse ling, kahoo e bitsoa tungsten steel, e tsejoang hape e le carbide e entsoeng ka samente,' me e nkoa e le leino la mehleng ea kajeno. indasteri.
Tungsten tšepe ke thepa e entsoeng ka sintered e entsoeng ka bonyane carbide e le 'ngoe ea tšepe. Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, le tantalum carbide ke likarolo tse tloaelehileng tsa tšepe ea tungsten. Boholo ba lijo-thollo tsa karolo ea carbide (kapa mohato) hangata bo pakeng tsa 0.2-10 microns, 'me lithollo tsa carbide li tšoaroa hammoho ho sebelisa tšepe ea tšepe. Litšepe tse kopanyang hangata ke litšepe tsa sehlopha sa tšepe, tse sebelisoang hangata ke cobalt le nickel. Ka hona, ho na le li-alloys tsa tungsten-cobalt, li-alloys tsa tungsten-nickel le li-alloys tsa tungsten-titanium-cobalt.
Sintering ea tšepe ea tungsten ke ho hatella phofo ka har'a billet, ebe e e futhumatsa ka seboping sa sintering ho mocheso o itseng (mocheso oa sintering), e boloke nako e itseng (nako e tšoarellang), ebe oe pholisa ho fumana. thepa ea tšepe ea tungsten e nang le thepa e hlokahalang.
① Carbide e entsoeng ka samente ea Tungsten-cobalt
Likarolo tse ka sehloohong ke tungsten carbide (WC) le binder cobalt (Co). Sehlopha sa eona se entsoe ka "YG" (li-initials tsa pinyin ea Sechaena ea "hard, cobalt") le peresente ea kakaretso ea cobalt. Mohlala, YG8 e bolela hore karolelano ea WCo=8%, 'me e setseng ke tungsten-cobalt cemented carbide ea tungsten carbide.
②Tungsten-titanium-cobalt e entsoeng ka samente carbide
Likarolo tse ka sehloohong ke tungsten carbide, titanium carbide (TiC) le cobalt. Sehlopha sa eona se entsoe ka "YT" (litlhaku tsa pele tsa pinyin ea Sechaena ea "hard, titanium") le likahare tse tloaelehileng tsa titanium carbide. Mohlala, YT15 e bolela hore karolelano ea TiC=15%, 'me e setseng ke tungsten carbide le cobalt-based tungsten-titanium-cobalt cemented carbide.
③Tungsten-titanium-tantalum (niobium) e thehiloeng ho carbide e entsoeng ka samente
Likarolo tse ka sehloohong ke tungsten carbide, titanium carbide, tantalum carbide (kapa niobium carbide) le cobalt. Mofuta ona oa carbide e entsoeng ka samente e boetse e bitsoa carbide e tloaelehileng e entsoeng ka samente kapa universal cemented carbide. Sehlopha sa eona se entsoe ka “YW” (litlhaku tsa pele tsa pinyin ea Sechaena ea “hard” le “wan”) hammoho le nomoro ea tatelano, joalo ka YW1.
Tungsten tšepe e na le letoto la thepa e babatsehang e kang boima bo phahameng, ho hanyetsa ho roala, matla a matle le ho tiea, ho hanyetsa mocheso le ho hanyetsa ha kutu, haholo-holo boima ba eona bo phahameng le ho hanyetsa ho apara, tseo ha e le hantle li lulang li sa fetohe esita le mocheso oa 500 ° C. E ntse e na le boima bo phahameng ho 1000°C. Carbide e entsoeng ka samente e sebelisoa haholo e le lisebelisoa, tse kang lisebelisoa tse fetolang, li-milling cutters, li-drill, li-boring, joalo-joalo Lebelo la ho itšeha la carbide e ncha e entsoeng ka samente ke makhetlo a makholo ho feta a carbon steel.
Nako ea poso: Aug-09-2023
