E hoʻomaopopo i ke kila māmā
ʻO ke kila kiʻekiʻe (HSS) he kila mea hana me ka paʻakikī kiʻekiʻe, ke kūpaʻa ʻaʻahu kiʻekiʻe a me ke kūpaʻa wela kiʻekiʻe, ʻike ʻia hoʻi ʻo ka makani makani a i ʻole ke kila mua, ʻo ia hoʻi e hiki ke paʻakikī ʻoiai i ka wā e maʻalili ʻia i ka ea i ka wā e kinai ana, a he oi loa. Ua kapa ʻia ʻo ia he kila keʻokeʻo.
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ʻO ke kila kiʻekiʻe ke kila kila me ka haku mele paʻakikī, loaʻa nā mea hana carbide e like me tungsten, molybdenum, chromium, vanadium, a me ka cobalt. ʻO ka nui o nā mea hoʻohui i kahi 10-25%. Hiki iā ia ke mālama i ka paʻakikī kiʻekiʻe ma lalo o ke kūlana o ka wela kiʻekiʻe i hana ʻia e ka wikiwiki wikiwiki (e pili ana i 500 ℃), a hiki i kāna HRC ke piʻi ma luna o 60. ʻO kēia ke ʻano koʻikoʻi o ke kila kiʻekiʻe - ʻulaʻula paʻakikī. Ma hope o ke kinai ʻana a me ka haʻahaʻa haʻahaʻa haʻahaʻa, ʻoi aku ka paʻakikī o ke kila kila i ka lumi wela, akā ke kiʻekiʻe ka mahana ma mua o 200 ° C, e hāʻule nui ka paʻakikī, a ua hāʻule ka paʻakikī i kahi pae e like me ke kūlana annealed. 500°C. , Nalo loa i ka hiki ke oki metala, i kaupalena 'ia ka hoʻohana 'ana i ke kalapona paahana kila no ka oki mea paahana. ʻO ke kila kiʻekiʻe e hana i nā hemahema make o ke kila mea hana kalapona ma muli o kona ʻulaʻula maikaʻi.
Hoʻohana nui ʻia ke kila kiʻekiʻe no ka hana ʻana i nā ʻāpana lahilahi paʻakikī a me nā mea hana ʻoki metala paʻa i ka hopena, a me nā bearings wela wela a me ka make ʻana o ke anuanu, e like me nā mea hoʻohuli, drill bits, hobs, machine saw blades, a me nā mold koi.
▌ E aʻo kākou e pili ana i ke kila tungsten
ʻO ke kila Tungsten (tungsten carbide) he mau waiwai maikaʻi loa e like me ke kiʻekiʻe o ka paʻakikī, ke kūpaʻa ʻana, ka ikaika maikaʻi a me ka paʻakikī, ka pale wela a me ka pale ʻana i ka corrosion, ʻoi aku ka paʻakikī kiʻekiʻe a me ke kūpaʻa ʻana, ʻoiai ma kahi mahana o 500 ° C. ʻaʻole i hoʻololi ʻia, a ʻoi aku ka paʻakikī ma 1000 °C.
ʻO ke kila Tungsten, ʻo nā mea nui ka tungsten carbide a me ka cobalt, nona ka 99% o nā mea āpau, a ʻo 1% nā metala ʻē aʻe, no laila ua kapa ʻia ʻo tungsten steel, ʻike ʻia hoʻi he carbide cemented, a ua manaʻo ʻia ʻo ia ka niho o kēia wā. ʻoihana.
ʻO ke kila Tungsten kahi mea i hoʻopaʻa ʻia i haku ʻia me hoʻokahi carbide metala. ʻO Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, a me tantalum carbide nā mea maʻamau o ke kila tungsten. Aia ma waena o 0.2-10 microns ka nui o ka ʻāpana carbide (a i ʻole ʻāpana), a ua hoʻopaʻa pū ʻia nā ʻōpala carbide me ka hoʻohana ʻana i kahi mea hoʻopaʻa metala. ʻO nā metala paʻa he mau metala hui hao, ʻo ia ka cobalt a me ka nickel. No laila, aia nā tungsten-cobalt alloys, tungsten-nickel alloys a me tungsten-titanium-cobalt alloys.
ʻO ka sintering o ke kila tungsten ke kaomi ʻana i ka pauka i loko o kahi billet, a laila e wela i loko o kahi umu sintering i kahi mahana (sintering temperature), mālama ia no kekahi manawa (manawa paʻa), a laila hoʻomaha a loaʻa. ka mea kila tungsten me nā mea pono.
① Tungsten-cobalt cemented carbide
ʻO nā mea nui ka tungsten carbide (WC) a me ka binder cobalt (Co). Aia kona papa me "YG" (nā hua mua o ka pinyin Kina o "paʻakikī, cobalt") a me ka pākēneka o ka maʻiʻo cobalt maʻamau. No ka laʻana, YG8 'o ia hoʻi ka awelika WCo=8%, a me ke koena he tungsten-cobalt cemented carbide o tungsten carbide.
②Tungsten-titanium-cobalt cemented carbide
ʻO nā mea nui he tungsten carbide, titanium carbide (TiC) a me ka cobalt. Hoʻokumu ʻia kāna papa me "YT" (nā hua mua o ka pinyin Kina o "paʻakikī, titanium") a me ka ʻike maʻamau o ka titanium carbide. No ka laʻana, YT15 'o ia hoʻi ka awelika TiC = 15%, a me ke koena he tungsten carbide a me ka cobalt-based tungsten-titanium-cobalt cemented carbide.
③Tungsten-titanium-tantalum (niobium)-based cemented carbide
ʻO nā mea nui he tungsten carbide, titanium carbide, tantalum carbide (a i ʻole niobium carbide) a me ka cobalt. Ua kapa ʻia kēia ʻano carbide cemented carbide maʻamau a i ʻole carbide cemented universal. Hoʻokumu ʻia kāna papa me "YW" (nā hua mua o ka pinyin Kina o "paʻakikī" a me "wan") me kahi helu kaʻina, e like me YW1.
ʻO ke kila Tungsten he mau waiwai maikaʻi loa e like me ka paʻakikī kiʻekiʻe, ke kūpaʻa ʻana, ka ikaika maikaʻi a me ka paʻakikī, ka pale ʻana i ka wela a me ka pale ʻana i ka corrosion, ʻoi aku ka paʻakikī kiʻekiʻe a me ke kūpaʻa ʻana, ʻaʻole i hoʻololi ʻia ma kahi mahana o 500 °C. Loaʻa ka paʻakikī kiʻekiʻe ma 1000 ° C. Hoʻohana nui ʻia ka carbide cemented ma ke ʻano he mea, e like me nā mea hoʻohuli, nā mea ʻoki wili, nā drills, nā mea hana ʻoluʻolu, a me nā mea ʻē aʻe.
Ka manawa hoʻouna: ʻAukake-09-2023
