E hele mai e aʻo e pili ana i ka HSS
ʻO ke kila māmā holo kiʻekiʻe (HSS) he kila mea hana me ka paʻakikī kiʻekiʻe, ke kūpaʻa ʻaʻahu kiʻekiʻe a me ke kūpaʻa wela kiʻekiʻe, ʻike ʻia hoʻi ʻo ke kila makani a i ʻole ke kila ʻoi, ʻo ia hoʻi ka paʻakikī ʻoiai i ka wā i hoʻomaloʻo ʻia i ka ea i ka wā e kinai ai a ʻoi. Ua kapa ʻia ʻo ia he kila keʻokeʻo.
ʻO ke kila wikiwiki kiʻekiʻe he kila kila me kahi hui paʻakikī i loaʻa nā mea hana carbide e like me tungsten, molybdenum, chromium, vanadium a me ka cobalt. ʻO ka nui o nā mea hoʻohui i hiki i ka 10 a 25%. Hiki iā ia ke mālama i ka paʻakikī kiʻekiʻe ma lalo o ka wela nui (e pili ana i 500 ℃) i kaʻoki wikiwikiʻana, hiki i ka HRC ke piʻi ma luna o 60. ʻO kēia ka mea nui loa o ka HSS - ka paʻakikīʻulaʻula. A me carbon mea paahana kila ma ke kinai ana a me ka haʻahaʻa wela tempering, ma ka lumi wela, oiai aia he kiʻekiʻe loa paakiki, akā, i ka mahana i oi aku mamua o 200 ℃, ka paakiki e hāʻule loa, ma 500 ℃ ua hāʻule ka paʻakikī i kahi degere like me. ka moku'āina annealed, nalowale loa i ka hiki ke oki metala, ka mea i kaupalena 'ia ke kalapona mea paahana kila. A me ke kila kiʻekiʻe-māmā ma muli o ka maikaʻi ʻulaʻula paʻakikī, e hana i nā hemahema fatal o ke kila mea hana kalapona.
Hoʻohana nui ʻia ke kila kiʻekiʻe no ka hana ʻana i nā mea ʻoki metala paʻakikī a paʻakikī hoʻi, akā no ka hana ʻana i nā bearings wela kiʻekiʻe a me nā make extrusion anu, e like me nā mea hana hoʻohuli, drills, hobs, machine saw blades a me nā make koi.
E hele mai e aʻo e pili ana i ke kila tungsten
ʻO ke kila Tungsten (carbide) he pūʻulu o nā waiwai maikaʻi loa e like me ka paʻakikī kiʻekiʻe, ke kūpaʻa ʻana, ʻoi aku ka maikaʻi o ka ikaika a me ka paʻakikī, ka pale ʻana i ka wela, ka pale ʻana i ka corrosion, a me nā mea ʻē aʻe. a loaʻa nō ka paʻakikī kiʻekiʻe ma 1000 ℃.
ʻO ke kila Tungsten, nona nā mea nui he tungsten carbide a me ka cobalt, he 99% o nā mea āpau a me 1% o nā metala ʻē aʻe, no laila ua kapa ʻia ʻo tungsten steel, ʻike ʻia hoʻi he carbide cemented, a ua manaʻo ʻia ʻo ia nā niho o ka ʻoihana hou.
ʻO ke kila Tungsten kahi mea i hoʻopaʻa ʻia i hoʻopaʻa ʻia i loaʻa ma ka liʻiliʻi o hoʻokahi hui carbide metala. ʻO Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, a me tantalum carbide nā mea maʻamau o ke kila tungsten. ʻO ka nui o ka palaoa o ka ʻāpana carbide (a i ʻole ka pae) ma ke ʻano he 0.2-10 microns, a ua hoʻopaʻa ʻia nā ʻōpala carbide me ka hoʻohana ʻana i kahi mea hoʻopaʻa metala. ʻO nā metala paʻa he mau metala hui hao, maʻamau ka cobalt a me ka nickel. No laila, aia nā tungsten-cobalt alloys, tungsten-nickel alloys a me tungsten-titanium-cobalt alloys.
ʻO ka hana ʻana i ka tungsten sinter ʻo ia ke kaomi ʻana i ka pauka i loko o kahi billet, a laila i loko o kahi umu sintering e wela ai i kahi mahana (sintering temperature) a mālama ʻia no kekahi manawa (manawa paʻa), a laila hoʻomaha ia e kiʻi i ke kila tungsten. mea me na waiwai i makemakeia.
①Tungsten a me ka cobalt cemented carbide
ʻO ka mea nui ka tungsten carbide (WC) a me ka binder cobalt (Co). Aia ka papa me "YG" ("paʻakikī, cobalt" ma Hanyu Pinyin) a me ka pākēneka o ka maʻiʻo kobalt maʻamau. No ka laʻana, YG8, ʻo ia hoʻi ka awelika WCo = 8% a ʻo ke koena he tungsten carbide cemented carbide.
②Tungsten, titanium a me ka cobalt cemented carbide
ʻO nā mea nui he tungsten carbide, titanium carbide (TiC) a me ka cobalt. Hoʻokumu ʻia ka papa me "YT" ("paʻakikī, titanium" ma Hanyu Pinyin) a me ka ʻike maʻamau o ka titanium carbide. No ka laʻana, YT15, ʻo ia hoʻi ka awelika TiC=15%, ʻo ke koena he tungsten carbide a me ka ʻike cobalt o ka tungsten titanium cobalt carbide.
③Tungsten-titanium-tantalum (niobium) carbide
ʻO nā mea nui he tungsten carbide, titanium carbide, tantalum carbide (a i ʻole niobium carbide) a me ka cobalt. Kapa ʻia kēia ʻano carbide he carbide kumu nui a i ʻole carbide universal. Aia ka papa me "YW" ("paʻakikī" a me "miliona" ma Hanyu Pinyin) me kahi helu kaʻina, e like me YW1.
ʻO ke kila Tungsten he pūʻulu o nā waiwai maikaʻi loa e like me ka paʻakikī kiʻekiʻe, ke kūpaʻa ʻana, ʻoi aku ka ikaika a me ka paʻakikī, ka pale wela, ka pale ʻana i ka corrosion, a me nā mea ʻē aʻe. paʻakikī kiʻekiʻe ma 1000 ℃. Hoʻohana nui ʻia ka carbide sima ma ke ʻano he mau mea, e like me nā mea hoʻohuli, nā mea hana wili, nā drills, nā mea hoʻoluliluli, a me nā mea ʻē aʻe.
Ka manawa hoʻouna: Feb-21-2023
