Kev tsim cov txheej txheem ntawm cov pob zeb diamond pom hniav yog qhov sib txawv ntawm cov pob zeb diamond pom hniav, Cov hauv qab no yuav qhia cov yam ntxwv ntawm cov pob zeb diamond pom hniav zoo thiab qhia ntau lub ntsiab lus uas yuav tsum tau them nyiaj rau hauv cov txheej txheem ntau lawm.

1: Cov qib pob zeb diamond yuav tsum tau xaiv. Yog li dab tsi ntawm pob zeb diamond zoo? Txij li thaum nws tsis yooj yim los tswj cov duab ntawm cov khoom kawg thaum lub sij hawm tsim cov pob zeb hluavtaws, feem ntau cov pob zeb diamond muaj cov qauv tsis sib xws. Cov duab polygonal yog ntse dua li cov qauv tetrahedral, tab sis cov pob zeb diamond no tsim tsawg dua. Feem ntau siv pob zeb diamond rau saw hniav yog pob zeb diamond hexahedral. Yog li dab tsi yog qhov txawv ntawm cov neeg pluag-qib pob zeb diamond thiab qib high-qib industrial pob zeb diamond? Cov pob zeb tsis zoo yog ntawm octahedral lossis ntau dua faceted qauv, Hauv cov txheej txheem txiav tiag tiag, vim tias qhov loj txiav cov txiv ntseej tsim los ntawm txhua lub ntsej muag ntawm lub pob zeb diamond, kev txiav muaj peev xwm tsis tuaj yeem hais txog. Tau kawg, yog tias muaj qee qhov teeb meem nrog lub pob zeb diamond tshwm sim los ntawm qhov kub thiab txias thaum lub sijhawm tsim khoom. Los yog theem nrab sintering ntawm pob zeb diamond yuav ua rau cov khoom tsis ruaj khov ntawm pob zeb diamond, xws li siab dua brittleness thiab tsis txaus hardness. Yog li ntawd, xaiv pob zeb diamond hmoov nrog ntau npaum li tetrahedra li sai tau yog ib qho tseem ceeb ua ntej yuav ua tau zoo pob zeb diamond saw hniav.

2: Qhov loj me me yog nruab nrab, Coarse-grained pob zeb diamond muaj qhov zoo ntawm kev txiav muaj peev xwm thiab siab txiav ntug, uas yog ib qho yuav tsum muaj rau cov hniav zoo nkauj. Qhov zoo particle saw hniav muaj cov yam ntxwv ntawm kev sib tsoo ntxiv, kev siv tsawg dua thiab kev faib tawm. Thaum lub sij hawm txiav, cov khoom uas tsis yog hauv av los ntawm coarse-grained pob zeb diamond tuaj yeem ntxiv thiab hauv av, thiab cov pob zeb diamond yuav tsis raug tshem tawm sai heev vim muaj kev cuam tshuam, uas yuav ua rau cov khib nyiab loj heev. Ntxiv mus, qhov tsim nyog daim ntawv thov ntawm ntxhib thiab nplua hais, xam raws li qhov ntau ntom, tuaj yeem ua kom cov pob zeb diamond concentration sai sai rau qee yam. Feem ntau, txawm tias ntxhib-grained pob zeb diamond yog qhov kev pab zoo rau kev txiav. Txawm li cas los xij, ntxiv qee cov pob zeb diamond zoo kom haum rau cov ntxhib thiab cov hmoov zoo yuav ua rau cov saw hniav zoo dua qub thaum lub sijhawm txiav, thiab yuav tsis muaj qhov xwm txheej uas cov pob zeb ntxhib ntxhib tsis tuaj yeem txiav tom qab ua hauv av.

3: Zoo thermal stability. Nyob rau hauv cov txheej txheem ntau lawm ntawm pob zeb diamond, graphite yog ua tiav los ntawm qhov kub thiab txias. High-temperature graphite forms pob zeb diamond hmoov hais nyob rau hauv ib tug yam ntxwv ib puag ncig. Qhov tseeb, feem ntau cov pob zeb diamond hauv qhov muaj tib lub thermal stability. Txawm li cas los xij, nws tau raug txiav txim siab tias yog tias lub thermal stability ntawm pob zeb diamond yog nce, qhov ua tau zoo ntawm pob zeb diamond tuaj yeem nce ntxiv. Yog li ntawd, tib neeg ua tiav lub hom phiaj ntawm kev nce thermal stability los ntawm titanium plating. Muaj ntau txoj hauv kev ntawm titanium plating, suav nrog brazing titanium plating, thiab titanium plating siv cov txheej txheem titanium plating. Xws li seb lub xeev ntawm titanium plating yog khoom lossis kua, thiab lwm yam, muaj kev cuam tshuam zoo rau qhov kawg ntawm titanium plating.

4: Ua kom muaj peev xwm txiav ntawm pob zeb diamond saw hniav los ntawm kev ua kom lub zog tuav. Nws tau pom tias muaj zog carbon tuaj yeem ncaj qha tsim cov qauv ruaj khov ntawm pob zeb diamond, tseem hu ua cov pa roj carbon muaj zog. Cov ntsiab lus hlau uas tuaj yeem tsim cov khoom sib txuas nrog pob zeb diamond, suav nrog cov khoom siv hlau xws li plating, titanium, chromium, npib tsib xee, tungsten, thiab lwm yam. Kuj tseem muaj cov hlau xws li molybdenum, uas tuaj yeem txhim kho lub wettability ntawm pob zeb diamond thiab cov hlau no, thiab ua kom muaj kev tuav pov hwm. quab yuam ntawm pob zeb diamond los ntawm kev nce lub wettability.

5: Kev siv ultra-nplua hmoov los yog prefabricated alloy hmoov tuaj yeem ua rau kom ruaj khov ntawm daim ntawv cog lus. Cov hmoov zoo dua, qhov muaj zog dua qhov wettability ntawm txhua cov hmoov hlauthiab pob zeb diamond thaum lub sij hawm sintering, Nws kuj zam qhov poob thiab kev sib cais ntawm cov hlau tsis tshua muaj melting point ntawm qhov kub thiab txias, uas tsis tuaj yeem ua tiav cov nyhuv ntawm cov hlau thiab cov dej ntub dej, uas txo cov kev txiav zoo thiab matrix stability ntawm pob zeb diamond saw hniav.

6: Ntxiv qhov tsim nyog ntawm cov ntsiab lus tsis tshua muaj hauv ntiaj teb (xws li lub ntiaj teb tsis tshua muaj lanthanum, cerium, thiab lwm yam) rau cov hmoov matrix. Nws tuaj yeem txo qhov hnav ntawm pob zeb diamond cutter taub hau matrix, thiab tseem tuaj yeem txhim kho qhov kev ua haujlwm ntawm cov pob zeb diamond saw hniav (qhov kev ua tau zoo tshaj plaws yog tias thaum qhov kev ua kom zoo dua qub, lub neej ntawm cov saw hniav txo qis).

7: Lub tshuab nqus tsev tiv thaiv sintering, cov tshuab sintering feem ntau yog sintered hauv lub xeev ntuj. Txoj kev sintering no tso cai rau ntu kom raug huab cua rau lub sijhawm ntev. Thaum lub sij hawm sintering txheej txheem, ntu yog nquag oxidation thiab txo stability. Txawm li cas los xij, yog tias lub taub hau txiav yog sintered nyob rau hauv ib puag ncig lub tshuab nqus tsev, nws tuaj yeem txo qhov oxidation ntawm ntu thiab txhim kho kev ruaj ntseg ntawm ntu.

8: Ib qho pwm sintering. Raws li txoj cai ua haujlwm ntawm lub tshuab kub nias sintering tam sim no, txoj hauv kev zoo tshaj plaws yog siv ib hom sintering. Nyob rau hauv txoj kev no, thaum lub sij hawm sintering txheej txheem, kev ruaj ntseg sib txawv ntawm lub sab sauv thiab qis txheej ntawm ntu yog me me, thiab sintering yog uniform. Txawm li cas los xij, yog siv ob hom sintering lossis plaub hom sintering, qhov ruaj khov ntawm sintering yuav raug txo kom tsawg.

9: Vuam, thaum lub sij hawm vuam, qhov ruaj khov ntawm cov ntaub qhwv nyiaj yog ntau dua li ntawm cov ntaub qhwv tooj liab. Kev siv cov ntaub qhwv nyiaj nrog cov ntsiab lus ntawm 35% yog qhov kev pab zoo rau qhov kawg vuam lub zog ntawm cov saw hniav thiab qhov cuam tshuam thaum siv.

Hauv cov ntsiab lus, cov kev ua haujlwm siab pom cov hniav them nyiaj rau ntau cov ntsiab lus hauv cov txheej txheem tsim khoom. Tsuas yog los ntawm kev ua tib zoo tswj txhua yam ntawm txhua qhov kev yuav khoom, kev tsim khoom, kev ua haujlwm tom qab thiab lwm yam kev ua haujlwm tuaj yeem ua rau cov khoom siv pob zeb diamond pom hniav zoo heev.