PCD pcd pom hniav li cas?

PCD pcd pom hniav li cas?

Pom tias muaj coob tus neeg tsis paub ntau txog cov ntsiab lus ntawm PCD pom hniav, txawm suav nrog qee qhov ntawm lawv tsis yog txaus!

Lub npe Suav tag nrho ntawm PCD pom cov hniav yog cov lus luv ntawm cov pob zeb diamond tau kaw tseg (yog li PCD pom hniav yog tseem hu ua pob zeb diamond. Pom cov hniav, tab sis vim tias lub pob zeb diamond pom cov pob zeb tau tshwm sim ntau dua li PCD pom hniav li lub pob zeb diamond pom hniav. Nws tsis yog qhov tsis to taub hu rau nws PCD pob zeb diamond pom hniav.
Raws li peb txhua tus paub, Pob Zeb Diamond yog qhov nyuaj tshaj plaws uas muaj nyob hauv xwm. Nws yog ib txwm octahedral ib txwm siv lead ua ntawm cov pa roj carbon keeb tsim hauv qhov tob ntawm lub ntiaj teb nyob rau hauv kev ua siab siab thiab kub. Muaj zog, txhua qhov tseem ceeb siv hluav taws xob hluav taws xob koom nrog kev tsim ntawm pob zeb tawg, yog li lub hardness ntawm pob zeb diamond yog 4 zaug ntawm Corundum thiab 8 zaug ntawm Quartz!

Cov cuab yeej niaj hnub tau ntev tau tsim hluavtaws pob zeb diamond ib leeg, thiab pcycrystallize ib leeg siv cov hmoov nplej rau hauv pob zeb diamond polycrystals raws li cov xwm txheej tshwj xeeb. Lub hardness ntawm no polycrystalline pob zeb diamond (piv txwv li PCD) yog txawm tias nws tsis yog li nyuaj li 8000hv, uas yog 80 ~ 120 zaug uas yog tso cia rau carbide! Ntxiv mus, cov thermal conductivity series ntawm PCD yog 700W / MK, uas yog 2 ~ 9 zaug uas yog cov pa roj carbn thiab tooj liab. Yog li ntawd, siv pcb cov khoom raws li pom cov hniav hniav txhuam hniav ntsej muag, cov cua sov hloov ceev tau sai heev thaum txiav. Tsis tas li ntawd, cov coefficient ntawm thermal expansion ntawm PCD cov ntaub ntawv tsuas yog ib-tsib ntawm kev sib txhuam ntawm kev sib txhuam yog tsuas yog ib feem peb ntawm cov cemented carbide. Cov khoom no txiav txim siab tias cov hniav pom siv PCD cov ntaub ntawv raws li lub taub hau cutter yog sib npaug rau cov hniav pom. Nyob rau hauv qee qhov kev mob, tsis tsuas yog lub neej kev pabcuam lub neej ntawm lub carbide pom hniav, tab sis kuj yog qhov zoo ntawm cov npoo yog qhov zoo dua. Ntxiv mus, lub autinity ntawm PCD cov ntaub ntawv thiab tsis-muaj hlau thiab cov ntaub ntawv tsis yog cov hlau yog me me. Thaum txiav cov khoom tsis muaj hlau los yog cov ntaub ntawv tsis-hlau, PCD cutter lub taub hau yog tsis tshua muaj feem cuam tshuam rau sawdust tshaj li lub taub hau carbide dua Thaum kawg, muaj lwm qhov zoo dua: PCD cov khoom muaj zog acid thiab alkali tsis ruaj khov, uas tseem muaj txiaj ntsig zoo rau qhov zoo rau kev ruaj khov ntawm PCD pom hniav.

PCT PCD pom cov hniav yog siv carbide tso cai li 1mm, sau ua ke rau cov txheej txheem pcd lossis thaum kawg hauv alloy steel phaj ntawm lub ntsej muag, yog li los hloov Cov khoom nyuaj nrog PCD cutter taub hau. Nws yog kev txiav ntawm lub ntsej muag txhuam, uas zoo heev txhim kho lub neej kev pabcuam ntawm pom hniav pom thiab qhov ruaj khov ntawm kev txiav cov khoom zoo.

Tam sim no, ntau dua thiab ntau dua pom cov neeg siv pob zeb pom zoo siv cov pcd pob zeb diamond nrog cov kev lag luam pcades, uas yog qhov nyuaj rau txiav, thiab txhuas alloy lub qhov rooj thiab lub qhov rai cov tuam txhab tsim khoom los hloov cov carbide qub. Lub alloy pom hniav ntawm lub taub hau tsis tuaj yeem txiav txuas ntxiv rau lub sijhawm ntev, tab sis kuj tsis tas yuav hloov cov hniav tau pom ntau. Ntev, kev nkag siab, nws txo cov nqi txiav ntau piv nrog kev siv carbide pom cov hniav!