Iindidi ezintsha zeCarbide eneCemented

1. Iinkozo ezintle kunye ne-ultra-fine grain carbide

Emva kokucocwa okuziinkozo kwe-carbide ene-cemented, ubungakanani besigaba se-carbide esine-cemented siba sincinci, kwaye isigaba sokubambisana sisasazwa ngokulinganayo malunga nesigaba se-carbide esine-cemented, esinokuphucula ubunzima kunye nokugqoka ukuxhathisa kwe-carbide ene-cemented. Kodwa amandla okugoba ayancipha. Amandla okugoba anokuphuculwa ngokunyusa umxholo we-cobalt kwi-binder ngokufanelekileyo. Ubungakanani benkozo: ialloys yesixhobo somgangatho oqhelekileyo YT15, YG6, njl；tyena i-avareji yobungakanani benkozo ye-alloy ecolekileyo yi-1.5 ~ 2μm, kwaye leyo ye-micron grain carbide yi-1.0 ~ 1.3μm. I-Submicrograin carbide yi-0.6 ~ 0.9μm；tyena ultra-fine crystal carbide yi 0.4 ~ 0.5μm; I-nano-series microcrystalline carbide yi-0.1 ~ 0.3μm; Izixhobo zokusika i-carbide yaseChina ziye zafikelela kwinqanaba lokutya okuziinkozo kunyeisohlwayo esiphantsiingqolowa.

2.TiC base carbide

I-TiC njengomzimba oyintloko, obala ngaphezu kwe-60% ukuya kwi-80%, kunye ne-Ni ~ Mo njenge-binder, kwaye yongeza inani elincinci leminye i-carbides ye-alloy, equkethe akukho okanye ngaphantsi kwe-WC. Xa kuthelekiswa ne-WC base alloy, i-TiC inobulukhuni obuphezulu kwi-carbide, ngoko ke ubunzima be-alloy buphezulu njenge-HRA90 ~ 94, ikwanazo ukumelana nokunxiba, ukukwazi ukunxiba i-anti-crescentless, ukumelana nobushushu, ukumelana ne-oxidation kunye nokuzinza kweekhemikhali, kunye Ubudlelwane kunye nesixhobo sokusebenza sincinci, i-friction factor incinci, ukuxhathisa ukunamathela kunamandla, ukuqina kwesixhobo kuphindwe kaninzi kune-WC, ngoko ke inokucutshungulwa yintsimbi kunye nentsimbi. Xa kuthelekiswa ne-YT30, ubulukhuni be-YN10 busondele, ukuwelda kunye nokubukhali kulungile, kwaye kunokutshintsha indawo ye-YT30. Kodwa amandla okugoba akafikeleli kwi-WC, esetyenziselwa ukugqiba kunye nokugqiba. Ngenxa yokunganyangeki kwayo kwi-deformation yeplastiki kunye nomda wokuwa, ayifanelekanga ukusika okunzima kunye nokusika okuphakathi.

3.I-carbide enesamente enezinto ezinqabileyo zomhlaba zongezwa

Umhlaba onqabileyo we-carbide owenziwe ngesamente ukwiintlobo ngeentlobo zezixhobo ze-carbide ze-cemented, ukongeza inani elincinci lezinto zomhlaba ezinqabileyo (amanani e-athomu kwitheyibhile ye-periodic yezinto zemichiza yi-57-71 (ukusuka ku-La ukuya ku-Lu), kunye ne-21 kunye ne-39 (Sc and Y) iziqalelo, iziqalelo ezili-17 zizonke), izakhi zomhlaba ezinqabileyo zikhona kwi (W, Ti)C okanye (W, Ti, Ta, Nb)C isisombululo esiqinileyo. Inokomeleza isigaba esinzima, inqanda ukukhula okungalinganiyo kweenkozo zeWC kwaye ibenze ibe yinto efanayo, kwaye ubukhulu bengqolowa buyancipha. Inani elincinci lezinto ezinqabileyo zomhlaba nazo zinyibilikisiwe ngokuqinileyo kwisigaba sokubopha i-Co, esomeleza isigaba sokudibanisa kwaye senze isakhiwo sibe lukhuni ngakumbi. Iziqalelo zomhlaba ezinqabileyo ziyatyetyiswa kujongano lweWC/Co naphakathi kojongano lwe (W, Ti) C, (W, Ti) C, njalo njalo, kwaye kaninzi zidityaniswa nobumdaka S, O, njalo njalo, ukwenza iikhompawundi ezinje. njenge-RE2O2S, ephucula ukucoceka kwe-interface kunye nokuphucula ukumanzisa kwesigaba esinzima kunye nesigaba esibophekileyo. Ngenxa yoko, ukuqina kwempembelelo, amandla okugoba kunye nokuchasana kwempembelelo yomhlaba onqabileyo we-samente carbide kuye kwaphuculwa kakhulu. Ubushushu begumbi layo kunye nobunzima obuphezulu beqondo lokushisa, ukumelana nokunxiba kunye nokukwazi ukuchasana nokusabalalisa kunye ne-anti-oxidation ebusweni besixhobo kuye kwaphuculwa. Ngexesha lokusika, i-cobalt-rich phenomenon of the surface layer of the rare earth cemented cemented carbide blade inokunciphisa ngokufanelekileyo i-friction factor phakathi kwe-chip, i-workpiece kunye nesixhobo, kunye nokunciphisa amandla okusika. Ngoko ke, iimpawu zomatshini kunye neempawu zokusika ziphuculwe ngokufanelekileyo. I-China ityebile kwizinto ezinqabileyo zomhlaba, kwaye uphando kunye nophuhliso lwe-carbide enqabileyo yomhlaba iphambi kwamanye amazwe. Ii-alloys ze-P, M, K ziye zaphuhliswa ukongeza amabakala omhlaba anqabileyo.

4.Ifakwe ngesamente carbide

Due kubulukhuni kunye nokumelana nokunxiba kwekhabhide enesamente kulungile, ukuqina akulunganga, ngokubekwa komphunga wekhemikhali (CVD) kunye nezinye iindlela, kumphezulu wekhabhide enesamente egqunywe ngomaleko (5 ~ 12μm) wokuqina okulungileyo, ukumelana nokunxiba okuphezulu. kwi-substance (TiC, TiN, Al2O3), ukubunjwa kwe-carbide ene-cemented, ukwenzela ukuba ibe nobunzima obuphezulu kunye nokuxhatshazwa okuphezulu komgangatho, kunye ne-matrix enamandla; Ngoko ke, inokuphucula ubomi besixhobo kunye nokusebenza kakuhle, ukunciphisa amandla okusika kunye nokushisa okusika, ukuphucula umgangatho womhlaba owenziwe ngoomatshini, kunye nokuphucula kakhulu ukuqina kwesixhobo kwisantya esifanayo sokusika. Kwiminyaka engama-20 edlulileyo, iimela ezigqunywe ngecarbide ziye zaphuhliswa kakhulu, kwaye zibalelwa ngaphezulu kwama-50% ukuya kuma-60%isalathisi-iyakwaziizixhobo kumazwe ahambele phambili kwezoshishino. Iiblayidi ezigqunyiweyo zifaneleke kakhulu ukujika okuqhubekekayo kwaye zisetyenziselwa ukugqiba, ukugqitywa kwesiqingatha kunye nomthwalo olula roughing ezahlukeneyo carbon structural steels, ialloy structural steels (kubandakanywa normalizing kunye nobushushu), iintsimbi zokusika lula, izixhobo zentsimbi, martensitic stainless steels kunye grey cast. intsimbi.

5. I-carbide esemgangathweni

I-Carbide kwezinye iimeko, ngaphezu kwemfuneko yobunzima bomgangatho ophezulu kakhulu kunye nokumelana nokunxiba, kodwa kufuneka ibe nefuthe elihle lokuqina. Ubulukhuni obuqhelekileyo be-carbide kunye namandla, ukuqina kunye nokumelana nokunxiba phakathi kwemiqobo ehambelanayo, ezi zimbini azinakuba zombini. Izinto ezisebenzayo zegradient zisombulula ezi ngxaki zingasentla zikhoyo kwi-carbide ene-cemented, ialloys ezinjalo zibonisa ukuhanjiswa kwe-gradient ye-Co kwisakhiwo, oko kukuthi, umaleko ongaphandle we-alloy ungaphantsi komxholo we-Co we-alloy cobalt-poor layer, umaleko ophakathi uphezulu kunomxholo we-Co oqhelekileyo we-alloy cobalt-rich layer, kwaye undoqo yi-WC-Co-η microstructure yesigaba sesithathu. Ngenxa yomxholo ophezulu we-WC kumphezulu, unobunzima obuphezulu kunye nokumelana nokunxiba kakuhle; umaleko ophakathi unomxholo we-Co ephezulu kunye nobunzima obuhle. Ngoko ke, ubomi bayo benkonzo bu-3 ukuya ku-5 amaxesha afana ne-carbide yendabuko efanayo, kwaye ukubunjwa koluhlu ngalunye kunokulungelelaniswa ngokweemfuno.

Ukushwankathela，ngokuhlelwa kunye nokucocwa kwe-carbide ene-cemented, sinokubona ukuba uhlobo olutsha lwesixhobo se-cemented carbide luphuculwe kakhulu kwisixhobo sendabuko, kwelinye icala, ukusetyenziswa kweengqungquthela ezintle kunye ne-ultra-fine particle materials of cemented carbide, kunye indibaniselwano egqibeleleyo yobunzima kunye namandla. Ukongezelela, iinkqubo ezintsha ezifana ne-pressing sintering zingaphucula ngakumbi umgangatho wangaphakathi we-carbide ene-cemented. Ngakolunye uhlangothi, isixhobo sendalo yonke esiphuhliswe sisixhobo se-carbide esikwizinga eliphezulu senza isantya sokusika, ukusika ukusebenza kakuhle kunye nobomi besixhobo ngokuphindwe kaninzi kunokwentsimbi ephezulu. Ukuveliswa kwezi zixhobo zitsha kuya kugcwalisa ubukhulu becala iziphene ze-carbide enesamente. Ukuphuhliswa kwezixhobo zezixhobo ze-carbide, ukwenzela ukuba kwisicelo sayo esisodwa ekusebenzeni kokwandiswa kophuhliso lweteknoloji yezixhobo zanamhlanje kwiinzuzo ezihambelanayo zezinto eziphathekayo, izinto ezithatha indawo yokongeza. Mayisetyenziswe kuluhlu oluphezulu kunye nolubanzi lwamasimi okusika. 

Ndiyathemba ukuba eli nqaku linokukunceda ukuba uqonde ngcono i-carbide enesamente kwinqanaba elithile. Ngaphandle kwale, nceda ufunde isiqingatha sokuqala“UHlelo kunye noFundo kwiZixhobo zokusika iCarbide eCemented”. Qhagamshelana nathi ukuba unombuzo okanye imfuneko malunga neemveliso ze-carbide.