1. Kev tsim khoom ntawm carbide-coated pob zeb diamond
Lub hauv paus ntsiab lus ntawm kev sib xyaw cov hlau hlau nrog pob zeb diamond, cua sov kom muaj qhov kub thiab rwb thaiv tsev rau qee lub sijhawm hauv qab. Ntawm qhov kub no, lub vapor siab ntawm cov hlau muaj txaus rau npog, thiab tib lub sijhawm, cov hlau yog adsorbed ntawm lub pob zeb diamond saum npoo av los ua pob zeb diamond.
2. Xaiv cov coated hlau
Txhawm rau ua kom lub tuam txhab pob zeb diamond thiab txhim khu kev qha, thiab kom nkag siab zoo dua ntawm cov txheej txheej ntawm txheej txheej, cov txheej txheej hlau yuav tsum tau xaiv. Peb paub tias pob zeb diamond yog ib qho kev ua txhua yam ntawm tus txheej txheem sib xws yog tias cov hlau muaj kev sib txawv rau cov pa roj carbon. Nyob rau hauv txoj kev no, nyob rau hauv qee qhov kev mob, kev sib cuam tshuam tshuaj lom neeg tshwm sim ntawm lub interface, tsim kev sib txuas lus ruaj khov, thiab ib daim mem tes ua. Lub Infiltration thiab Adhesion Theory nyob rau hauv lub pob zeb diamond-hlau system taw qhia tias cov kev sib txuam ntawm cov tshuaj lom neeg aw> 0 thiab mus txog ib qho nqi. Lub sijhawm luv luv b hlau cov ntsiab lus nyob rau hauv lub rooj ntu, xws li Cu, ag, tsis zoo tsim yog molecular bonds uas tsis muaj zog thiab yuav tsum tsis xaiv; Cov kev hloov pauv ntawm lub rooj ntev, xws li ti, V, CR, ME, thiab TI thiab TI thiab CR yog qhov haum rau cov hlau.
3. Lub teeb sim
Ntawm qhov kub ntawm 8500C, pob zeb diamond tsis tuaj yeem ncav cuag lub zog pub dawb ntawm cov roj carbon monoxide thiab yam tsawg 9000c kom ua tiav lub zog uas xav tau rau kev tsim cov hlau carbide. Txawm li cas los xij, yog tias qhov ntsuas kub dhau lawm, nws yuav tsim hluav taws xob hlawv rau lub pob zeb diamond. Xav txog cov cawv ntawm ntsuas ntsuas kub yuam kev thiab lwm yam, txheej txheem ntsuas kub yog teem rau ntawm 9500C. Raws li tuaj yeem pom los ntawm kev sib raug zoo ntawm cov sijhawm rwb thaiv tsev thiab cov tshuaj tiv thaiv ceev (hauv qab),? Tom qab ncav lub zog dawb ntawm cov hlau carbide tiam, cov tshuaj tiv thaiv tau ua sai sai, thiab nrog tus nqi ntawm carbide, tus nqi ntawm cov tshuaj tiv thaiv yuav maj mam qeeb. Tsis muaj kev ntseeg tias nrog kev ncua ntawm cov sij hawm rwb thaiv tsev, tab sis tom qab 60 feeb, qhov zoo tshaj ntawm txheej tsis muaj kev cuam tshuam, yog li peb teeb lub sijhawm rwb thaiv tsev li 1 teev; Lub tshuab nqus tsev siab dua, qhov zoo dua, tab sis txwv rau cov kev sim siab, peb feem ntau siv 10-3mm.
Ntim inset muaj peev xwm txhim kho txoj ntsiab cai
Cov txiaj ntsig kev sim qhia tau tias lub plab muaj zog rau lub pob zeb diamond coated dua li lub pob zeb diamond uncoated. Qhov laj thawj rau cov muaj zog muaj peev xwm ntawm lub plab rau lub pob zeb diamond yog qhov ntawd, muaj cov kab mob me me ntawm cov npoo av lossis sab hauv ntawm cov khoom siv dag zog. Vim tias muaj cov microcacks, lub zog ntawm lub pob zeb diamond txo qis, ntawm qhov tod tes, c c med ntawm lub pob zeb diamond tsis tshua muaj tshuaj tiv thaiv lub cev. Yog li ntawd, lub log tsheb lub cev ntawm pob zeb diamond uncoated yog purely lub tshuab extrusion pob, thiab hom pob no muaj zog heev. Thaum lub thauj khoom, cov ntawv sau ua ke saum toj no yuav ua rau muaj kev ntxhov siab, ua rau poob qis ntawm cov pob ntxig muaj peev xwm. Cov ntaub ntawv ntawm overburden diamond yog qhov sib txawv, vim yog cov yeeb yaj kiab hlau, ntawm ib sab tes, muaj lub zog micro, muaj kev ntxhov siab ntev dua. Tseem ceeb tshaj, in infiltration ntawm cov hlau sib khi hauv lub log tsheb tau hloov mus rau hauv cov pa pob zeb rau ntawm lub pob zeb diamond surfacethe infiltration ntawm cov tebchaw. Qhov tshwm sim yog cov hlau sib txuas ntawm lub pob zeb diamond ntub ntawm cov pob zeb diamond, yog qhov zoo tshaj plaws ntawm lub pob zeb diamond thiab lub log tsheb lub cev, yog li txhim kho lub plab lub cev
Pob tshuaj insetting. Nyob rau tib lub sijhawm, peb kuj ntseeg lwm yam xws li Sintering tsis, Qib, me nyuam pob tawb lub cev me me thiab yog li muaj qee yam cuam tshuam rau ntawm pob ntxig zog. Qhov uas tsim nyog Sintering tuaj yeem nce cov nias ntom ntom thiab txhim kho lub hardness ntawm lub plab lub cev. Qhov uas tsim nyog sintering kub thiab lub sijhawm rwb thaiv tsev yog qhov zoo sib xws, yog li ntawd ib theem yog soluble, thiab pob teeb tau zoo dua.
Excerpt los ntawm Liu Xiaohui
Lub sij hawm ncua: Mar-13-2025
