Tloo ho tla ithuta ka HSS
High-speed steel (HSS) ke sesebelisoa sa tšepe se nang le boima bo phahameng, ho hanyetsa ho apara ho phahameng le ho hanyetsa mocheso o phahameng, o tsejoang hape e le tšepe ea moea kapa tšepe e bohale, ho bolelang hore e thatafala le ha e pholile moeeng nakong ea ho tima 'me e bohale. E boetse e bitsoa tšepe e tšoeu.
Tšepe ea lebelo le phahameng ke tšepe ea alloy e nang le motsoako o rarahaneng o nang le lintho tse etsang carbide tse kang tungsten, molybdenum, chromium, vanadium le cobalt. Palo eohle ea likarolo tsa alloying e fihla ho 10 ho isa ho 25%. E ka boloka boima bo phahameng tlas'a mocheso o phahameng (hoo e ka bang 500 ℃) ka ho itšeha ka lebelo le phahameng, HRC e ka ba ka holimo ho 60. Ena ke tšobotsi ea bohlokoa ka ho fetisisa ea HSS - boima bo bofubelu bo bofubelu. Le tšepe ea tšepe ea carbon ka ho tima le mocheso o tlase oa mocheso, mocheso oa kamore, le hoja ho na le boima bo phahameng haholo, empa ha mocheso o feta 200 ℃, boima bo tla theoha haholo, ka 500 ℃ boima bo theohile ka tekanyo e tšoanang. boemo ba annealed, ka ho feletseng lahleheloa ke matla a ho khaola tšepe, e leng meeli ea carbon sesebelisoa tšepe ho itšeha lisebelisoa. Le tšepe ea lebelo le phahameng ka lebaka la boima bo bofubelu bo botle, ho etsa mefokolo e bolaeang ea tšepe ea sesebelisoa sa carbon.
Litšepe tse lebelo le phahameng li sebelisoa haholo ho etsa lisebelisoa tse thata tse tšesaane tse sehang le tse hananang le ts'usumetso, empa hape le ho etsa li-bearings tse nang le mocheso o phahameng le mocheso o batang, joalo ka lisebelisoa tse phetholang, li-drill, li-hobs, li-blades tsa mochini le ho shoa ho hlokahalang.
Tloo 'me u ithute ka tšepe ea tungsten
Tungsten tšepe (carbide) e na le letoto la thepa e babatsehang e kang boima bo phahameng, ho hanyetsa ho roala, matla a betere le ho tiea, ho hanyetsa mocheso, ho hanyetsa kutu, joalo-joalo, haholo-holo boima ba eona bo phahameng le ho roala ho hanyetsa ho lula ho sa fetohe esita le mocheso oa 500 ℃; mme o ntse o na le boima bo phahameng ho 1000 ℃.
Tungsten tšepe, eo likarolo tsa eona tse ka sehloohong e leng tungsten carbide le cobalt, e etsa karolo ea 99% ea likarolo tsohle le 1% ea lisebelisoa tse ling, kahoo e bitsoa tungsten steel, e tsejoang hape e le carbide e entsoeng ka samente, 'me e nkoa e le meno a indasteri ea kajeno.
Tungsten steel ke sesebelisoa se entsoeng ka sintered se nang le bonyane motsoako o le mong oa tšepe oa carbide. 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 ka har'a li-micron tse 0.2-10, 'me lithollo tsa carbide li kopantsoe hammoho ho sebelisa sekontiri sa tšepe. Litšepe tse kopanyang hangata ke tšepe ea sehlopha sa tšepe, hangata cobalt le nickel. Kahoo ho na le li-alloys tsa tungsten-cobalt, li-alloys tsa tungsten-nickel le li-alloys tsa tungsten-titanium-cobalt.
Ho theha sinter ea tungsten ke ho hatella phofo ka har'a billet, ebe ka sebōping sa sintering ho e futhumatsa ho mocheso o itseng (mocheso oa sintering) ebe o e boloka nako e itseng (ho tšoara nako), ebe oe pholisa ho fumana tšepe ea tungsten. thepa e nang le thepa e hlokahalang.
①Tungsten le cobalt e entsoeng ka samente carbide
Karolo e ka sehloohong ke tungsten carbide (WC) le binder cobalt (Co). Sehlopha se entsoe ka "YG" ("hard, cobalt" ka Hanyu Pinyin) le peresente ea kakaretso ea cobalt. Mohlala, YG8, e bolelang kakaretso ea WCo = 8% mme e setseng ke tungsten carbide cemented carbide.
②Tungsten, titanium le cobalt e entsoeng ka samente carbide
Likarolo tse ka sehloohong ke tungsten carbide, titanium carbide (TiC) le cobalt. Sehlopha se entsoe ka "YT" ("hard, titanium" ka Hanyu Pinyin) le kakaretso ea litaba tsa titanium carbide. Mohlala, YT15, e bolela karolelano ea TiC=15%, e setseng ke tungsten carbide le cobalt content ea tungsten titanium cobalt carbide.
③Tungsten-titanium-tantalum (niobium) carbide
Likarolo tse ka sehloohong ke tungsten carbide, titanium carbide, tantalum carbide (kapa niobium carbide) le cobalt. Mofuta ona oa carbide o boetse o bitsoa carbide-purpose-purpose kapa universal carbide. Kereiti e na le “YW” (“thata” le “millione” ka Hanyu Pinyin) mmoho le nomoro e latellanang, joalo ka YW1.
Tungsten tšepe e na le letoto la thepa e babatsehang e kang boima bo phahameng, ho hanyetsa ho roala, matla a betere le ho tiea, ho hanyetsa mocheso, ho hanyetsa kutu, joalo-joalo, haholo-holo boima ba eona bo phahameng le ho roala ho hanyetsa ho lula ho sa fetohe esita le mocheso oa 500 ℃, 'me ho ntse ho e-na le eona. boima bo phahameng ho 1000 ℃. Carbide e entsoeng ka samente e sebelisoa haholo e le lisebelisoa, tse kang lisebelisoa tse fetolang, lisebelisoa tsa ho sila, li-drill, lisebelisoa tse borata, joalo-joalo Lebelo la ho itšeha la carbide e ncha le lekana le makhetlo a makholo a carbon steel.
Nako ea poso: Feb-21-2023
