Qhov zoo ntawm cov ntawv pob zeb diamond sib xyaw tuaj yeem raug txiav txim los ntawm plaub qhov ntev: kev tshuaj xyuas zoo li, kev txheeb xyuas qhov ua tau zoo, cov txheej txheem kev txiav txim siab, thiab kev kuaj xyuas cov ntaub ntawv pov thawj. Lub hauv paus tseem ceeb yog los xyuas cov plaub yam tseem ceeb: hardness, hnav tsis kam, cuam tshuam tsis kam, thiab thermal stability.
1. Ua ntej, ua ib qho kev kuaj pom. Qhov tshwm sim yog lub hauv paus ncaj qha tshaj plaws rau kev txiav txim siab zoo. Cov khoom ua tau raws li qhov yuav tsum tau ua raws li cov hauv qab no:
Pob zeb diamond nto: Cov xim sib xws, tsaus grey mus rau greyish-dub, tsis muaj qhov pom tseeb, tawg, qhov pores, suav nrog, lossis lwm yam tsis xws luag. Qhov saum npoo yog du thiab tiaj tus, tsis muaj protrusions lossis kev nyuaj siab.
Interface bonding: Cov pob zeb diamond txheej thiab cov cemented carbide matrix yog nruj me ntsis sib koom ua ke, tsis muaj delamination, khoob, los yog bulges. Tsis yog -planar interface cov qauv muaj kev sib txuas ntau dua thiab zoo dua li cov qauv sib txuas.
Dimensional tolerances: Txoj kab uas hla thiab thickness kam rau ua tau raws li qhov yuav tsum tau ua. Kev ua yuam kev yog feem ntau tswj tsis pub dhau ± 0.1mm. Kev sib txawv tsis tu ncua yuav yog vim cov txheej txheem tsis ruaj khov.
2. Kev txheeb xyuas qhov ntsuas qhov ua tau zoo. Raws li kev lag luam tus qauv MT/T... 786-2011. Kev ua tau zoo tuaj yeem raug txiav txim los ntawm cov cim tseem ceeb hauv qab no:
Abrasion Ratio: Qhov no yog qhov taw qhia tseem ceeb rau kev ntsuas kev hnav tsis kam. Tsawg abrasion piv cov laum cov khoom yuav tsum muaj qhov nruab nrab ntawm 10 ~ 30 × 10⁴, thaum siab abrasion piv laum khoom yuav tsum muaj tus nqi ntau dua 30 × 10⁴. Tsis tas li ntawd, qhov sib piv ntawm ib qho kev xyaum me ntsis yuav tsum ntau dua 60% ntawm qhov nruab nrab tus nqi. Cov txiaj ntsig siab dua qhia tias hnav tsis kam thiab ua haujlwm ntev dua.
Impact Toughness: Qhov no yog qhov taw qhia tseem ceeb uas txiav txim siab lub neej kev pab cuam ntawm lub laum me ntsis. High- cov khoom zoo qhia tias tsis muaj kev tawg lossis delamination tom qab qhov kev sim poob rauj. Qhov cuam tshuam toughness ntawm mainstream siab-cov khoom siv hauv tsev zoo tuaj yeem ua tau raws li qhov yuav tsum tau muaj ntawm 3 J / cm² lossis siab dua, muaj peev xwm tiv taus kev vibrations thiab cuam tshuam thaum lub sijhawm drilling.
Thermal Stability: Qhov kub ntawm qhov kub thiab txias yuav tsum ncav cuag 750℃(rau ob feeb). High- cov khoom zoo, tom qab cobalt pom kev kho mob, tuaj yeem ua rau lawv qhov kub thiab txias nce mus txog 1200 degree. Tom qab sintering ntawm 750 degree, tsis muaj qhov txo qis hauv qhov sib piv thiab qhov cuam tshuam toughness. Kev ua tau zoo hloov pauv tus nqi siab - cov khoom zoo tsis tshaj 5%.
