Izinhlobo Ezintsha Ze-Cemented Carbide

1. Okusanhlamvu okuhle kanye ne-ultra-fine grain carbide

Ngemva kokucwengwa okusanhlamvu kwe-carbide enosimende, ubukhulu besigaba se-carbide esisimende siba mncane, futhi isigaba sokubopha sisakazwa ngokulinganayo eduze nesigaba se-carbide esisimende, esingathuthukisa ubulukhuni nokugqoka ukumelana kwe-carbide enosimende. Kodwa amandla okugoba ayancipha. Amandla okugoba angathuthukiswa ngokwandisa okuqukethwe kwe-cobalt ku-binder ngokufanelekile. Usayizi wokusanhlamvu: ama-alloys amathuluzi ebanga elivamile YT15, YG6, njll. okusanhlamvu okuphakathi, isilinganiso sikasayizi wokusanhlamvu si-2 ~ 3μm；tUsayizi ojwayelekile wokusanhlamvu we-alloy ocolile ungu-1.5 ~ 2μm, kanti owe-micron grain carbide ungu-1.0 ~ 1.3μm. I-Submicrograin carbide ingu-0.6 ~ 0.9μm；ti-ultra-fine crystal carbide ingu-0.4 ~ 0.5μm; I-nano-series microcrystalline carbide ingu-0.1 ~ 0.3μm; Amathuluzi okusika i-carbide yaseChina afinyelele izinga lokusanhlamvu okuhle futhiinhlawulo encaneokusanhlamvu.

2.I-TiC base carbide

I-TiC njengendikimba eyinhloko, ebalwa ngaphezu kuka-60% kuya ku-80%, ne-Ni ~ Mo njengesibophezelo, bese wengeza inani elincane lamanye ama-carbides we-alloy, aqukethe i-WC engekho noma ngaphansi. Uma iqhathaniswa ne-WC base alloy, i-TiC inobunzima obukhulu kakhulu ku-carbide, ngakho-ke ubulukhuni be-alloy buphezulu njenge-HRA90 ~ 94, futhi inokumelana nokugqokwa okuphezulu, ikhono lokugqoka i-anti-crescentless, ukumelana nokushisa, ukumelana ne-oxidation nokuzinza kwamakhemikhali, ukuhlobana ne-workpiece material kuncane, isici sokungqubuzana sincane, ukumelana nokunamathela kunamandla, ukuqina kwethuluzi kuphakeme izikhathi eziningana kune-WC, ngakho-ke ingacutshungulwa insimbi nensimbi ephonsiwe. Uma kuqhathaniswa ne-YT30, ubulukhuni be-YN10 buseduze, ukushisela nokucijile kuhle, futhi kungathatha indawo ye-YT30. Kodwa amandla okugoba awekho ku-WC, ikakhulukazi asetshenziselwa ukuqeda kanye nokuqeda kancane. Ngenxa yokumelana kwayo okungalungile nokuguqulwa kwepulasitiki kanye nonqenqema oluwayo, ayifanele ukusika okunzima nokusika ngezikhathi ezithile.

3.I-carbide enosimende enezici zomhlaba eziyivelakancane yengeziwe

I-carbide enosimende engavamile itholakala ezinhlobonhlobo zezinto ezisetshenziswayo ze-carbide zikasimende, ingeza inani elincane lezakhi zomhlaba eziyivelakancane (izinombolo ze-athomu kuthebula le-periodic lezakhi zamakhemikhali zingu-57-71 (kusuka ku-La kuya ku-Lu), kanye no-21 no-39(Sc and Y) izakhi, isamba sezakhi eziyi-17), izakhi zomhlaba ezingavamile zikhona kusixazululo esiqinile (W, Ti)C noma (W, Ti, Ta, Nb)C. Ingakwazi ukuqinisa isigaba esinzima, ivimbele ukukhula okungalingani kwezinhlamvu ze-WC futhi ibenze ibe yinto efanayo, futhi ubukhulu bokusanhlamvu buyancipha. Inani elincane lezakhi zomhlaba ezingavamile liphinde lincibilike ngokuqinile esigabeni sokubopha i-Co, esiqinisa isigaba sokubopha futhi senze isakhiwo siminyene kakhulu. Izakhi zomhlaba eziyivelakancane ziyacetshiswa ekuxhumaneni kwe-WC/Co naphakathi kwesixhumi esibonakalayo sika (W, Ti)C, (W, Ti)C, njll., futhi ngokuvamile sihlangana nokungcola S, O, njll., ukuze akhe izinhlanganisela ezifana njenge-RE2O2S, ethuthukisa ukuhlanzeka kwesixhumi esibonakalayo futhi ithuthukise ukumanzisa kwesigaba esinzima kanye nesigaba esiboshiwe. Ngenxa yalokho, ukuqina komthelela, amandla okugoba kanye nokumelana nomthelela we-carbide enosimende engavamile kuye kwathuthukiswa kakhulu. Ukushisa kwekamelo layo kanye nobulukhuni bokushisa obuphezulu, ukumelana nokugqoka kanye nekhono lokulwa nokusabalalisa kanye ne-anti-oxidation ebusweni bethuluzi nakho kuye kwathuthukiswa. Ngesikhathi sokusika, into ecebile nge-cobalt yongqimba olungaphezulu lomhlaba ongavamile we-carbide blade inganciphisa ngempumelelo isici sokungqubuzana phakathi kwe-chip, i-workpiece kanye nethuluzi, futhi inciphise amandla okusika. Ngakho-ke, izakhiwo zemishini kanye nezakhiwo zokusika zithuthukiswa ngokuphumelelayo. I-China inothe ngezinto ezingavamile zomhlaba, futhi ucwaningo nokuthuthukiswa kwe-carbide enosimende engavamile ingaphambi kwamanye amazwe. Ama-alloys e-P, M, K athuthukisiwe ukwengeza amamaki omhlaba angavamile.

4.Imbozwe nge-carbide enosimende

Due ekuqineni nasekugqokeni ukumelana kwe-carbide enosimende kuhle, ukuqina akulungile, ngokusebenzisa i-chemical vapor deposition (CVD) nezinye izindlela, phezu kwe-carbide enosimende embozwe ungqimba (5 ~ 12μm) wokuqina okuhle, ukumelana nokugqoka okuphezulu. kwento (i-TiC, i-TiN, i-Al2O3), ukwakheka kwe-carbide enosimende, ukuze ibe nobulukhuni obuphezulu nokumelana nokugqoka okuphezulu kobuso, kanye ne-matrix eqinile; Ngakho-ke, ingathuthukisa impilo yamathuluzi nokusebenza kahle kokucubungula, ukunciphisa amandla okusika kanye nezinga lokushisa lokusika, ithuthukise ikhwalithi yendawo eyenziwe ngomshini, futhi ithuthukise kakhulu ukuqina kwethuluzi ngesivinini esifanayo sokusika. Eminyakeni engu-20 edlule, imimese eboshwe nge-carbide iye yathuthuka kakhulu, futhi ibe ngaphezu kuka-50% kuya ku-60%inkomba-iyakwaziamathuluzi emazweni ezimboni athuthukile. Ama-coated blades afaneleka kakhulu ukuphenduka okuqhubekayo futhi asetshenziselwa ukuqedela, ukuqeda kancane kanye nokulayisha kalula kwezinsimbi ezihlukahlukene ze-carbon structural, i-alloy structural steels (okuhlanganisa ukujwayelekile nokufudumeza), izinsimbi zokusika kalula, izinsimbi zamathuluzi, izinsimbi ezingenasici ze-martensitic kanye no-grey cast. insimbi.

5. I-carbide ehlanganisiwe

I-Carbide kwezinye izimo, ngaphezu kwemfuneko yobulukhuni obuphezulu kakhulu nokumelana nokugqoka, kodwa futhi kudingeka ibe nomthelela omuhle wokuqina. Ubulukhuni obuvamile be-carbide obuqinile namandla, ukuqina nokumelana nokugqoka phakathi kwezithiyo ezihlangene, kokubili akukwazi ukuba kokubili. Izinto ezisebenzayo ze-gradient zixazulula izinkinga ezingenhla ezikhona ku-carbide enosimende, ama-alloys anjalo abonisa ukusatshalaliswa kwe-gradient ye-Co esakhiweni, okungukuthi, ungqimba olungaphandle lwengxubevange luphansi kunokuqukethwe okubizwa ngokuthi yi-Co kwengqimba ye-cobalt-poor alloy, ungqimba oluphakathi luphakeme kunokuqukethwe kwe-Co okuzisholo kwesendlalelo esinengxubevange ye-cobalt, futhi indikimba yi-WC-Co-η microstructure yezigaba ezintathu. Ngenxa yokuqukethwe okuphezulu kwe-WC ebusweni, inobunzima obuphezulu nokumelana okuhle kokugqoka; ungqimba oluphakathi lunokuqukethwe okuphezulu kwe-Co kanye nokuqina okuhle. Ngakho-ke, impilo yayo yesevisi iphindwe izikhathi ezi-3 kuya kwezi-5 kune-carbide yendabuko efanayo, futhi ukwakheka kwesendlalelo ngasinye kungalungiswa ngokuya ngezidingo.

Ngamafuphi，ngokuhlukaniswa nokucwengisiswa kwe-carbide enosimende, siyabona ukuthi uhlobo olusha lwethuluzi le-carbide likasimende selithuthukiswe kakhulu ithuluzi lendabuko, ngakolunye uhlangothi, ukusetshenziswa kwezinhlayiya ezinhle kanye nezinhlayiya ze-ultra-fine ze-carbide enosimende, inhlanganisela ephelele yobulukhuni namandla. Ngaphezu kwalokho, izinqubo ezintsha ezifana ne-pressure sintering zingathuthukisa ikhwalithi yangaphakathi ye-carbide enosimende. Ngakolunye uhlangothi, ithuluzi lomhlaba wonke elakhiwe ithuluzi lekhwalithi ephezulu le-carbide lenza isivinini sokusika, ukusika ukusebenza kahle kanye nempilo yamathuluzi ephakeme izikhathi eziningana kuneyensimbi enesivinini esikhulu. Ukukhiqizwa kwalawa mathuluzi amasha kuzogcwalisa kakhulu amaphutha e-carbide enosimende. Ukuthuthukiswa kwe-carbide ithuluzi materials, ukuze kusukela ekusetshenzisweni kwayo okuyingqayizivele ekusebenzeni kokuthuthukiswa kokuthuthukiswa kobuchwepheshe besimanje bezinto ezibonakalayo kuzinzuzo ezihambisanayo zezinto zokwakha, izinto zokwakha esikhundleni sesengezo. Mayisetshenziswe ebangeni eliphakeme nelibanzi lezindawo zokusika. 

Sethemba ukuthi lesi sihloko singakusiza ukuthi uqonde kangcono i-carbide enosimende ngokwezinga elithile. Ngaphandle kwalesi, sicela ufunde ingxenye yokuqala ye“Ukuhlukaniswa Nokufunda Ngamathuluzi Okusika I-Cemented Carbide”. Xhumana nathi uma unombuzo noma imfuneko mayelana nemikhiqizo ye-carbide.