Cov cuab yeej txiav nyuaj tshaj plaws ntawm pob zeb diamond yog Cubic Boron Nitride (CBN). CBN muaj npe nrov rau nws qhov tshwj xeeb hardness thiab thermal stability, uas ua rau nws tsim nyog rau ntau yam kev siv txiav. Nov yog qee qhov laj thawj tseem ceeb vim li cas CBN suav tias yog cov khoom siv txiav nyuaj tshaj plaws tom qab pob zeb diamond:
Structure thiab Composition: CBN yog tsim los ntawm boron thiab nitrogen atoms teem nyob rau hauv ib tug siv lead ua lattice qauv zoo ib yam li cov pob zeb diamond, uas muab nws zoo kawg li hardness thiab hnav tsis kam.
Hardness: Nrog rau tus nqi hardness ntawm kwv yees li 4500 kg / mm², CBN tsuas yog me ntsis nyuaj dua pob zeb diamond, uas muaj ib tug hardness ntawm txog 5000 kg / mm². Qhov siab hardness no tso cai rau CBN tiv thaiv hnav txawm tias thaum txiav cov ntaub ntawv nyuaj tshaj plaws.
Thermal stability: CBN nthuav tawm cov thermal stability zoo heev, txhais tau tias nws tuaj yeem tiv taus qhov kub thiab txias thaum lub sijhawm ua haujlwm yam tsis muaj qhov poob tseem ceeb hauv hardness lossis hnav tsis kam. Qhov no tso cai rau CBN cov cuab yeej siv los ntawm kev txiav ceev thiab txau, txhim kho kev ua haujlwm zoo thiab tsim khoom.
Tshuaj Inertness: CBN yog chemically inert, uas txhais tau hais tias nws tsis nkag mus rau lwm yam ntaub ntawv, xws li hlau. Cov cuab yeej no tiv thaiv cov khoom siv los ntawm kev sib txuas nrog cov khoom siv ua haujlwm thaum txiav, txo cov cuab yeej hnav thiab ua kom lub neej ntev.
Machining Applications: CBN feem ntau yog siv rau hauv kev siv machining qhov twg siab hardness thiab hnav tsis kam, tshwj xeeb tshaj yog thaum txiav hardened steels thiab superalloys. Nws yog feem ntau siv rau hauv kev tsim cov cuab yeej siv hlau xws li inserts, sib tsoo log, thiab honing pob zeb.
