PCD saw hniav yog dab tsi?

PCD saw hniav yog dab tsi?

Pom tias ntau tus neeg tsis paub ntau txog lub ntsiab lus ntawm PCD saw hniav, txawm tias suav nrog cov kws kho mob ntsig txog PCD saw hniav, cov lus txhais tau muab los ntawm qee qhov tsis raug txaus!

Lub npe Suav tag nrho ntawm PCD pom hniav yog cov ntawv luv ntawm "polycrystalline pob zeb diamond pom hniav", uas PCD yog cov ntawv luv ntawm PolyCrystalline Pob Zeb Diamond (los txhais ua Suav li polycrystalline pob zeb diamond), yog li PCD pom hniav tseem hu ua pob zeb diamond. Pom hniav, tab sis vim hais tias pob zeb diamond pom hniav rau txiav pob zeb tau tshwm sim ntau dua li PCD pom hniav, Huangrui Tool ntseeg hais tias nws yog ib qho yooj yim los ua kom tsis meej pem los tsuas yog hu rau PCD pom hniav raws li lub pob zeb diamond pom hniav. Nws tsis yog kev nkag siab dhau los hu nws PCD pob zeb diamond saw hniav.
Raws li peb txhua tus paub, pob zeb diamond yog cov khoom hnyav tshaj plaws uas muaj nyob hauv qhov xwm txheej. Nws yog ib txwm octahedral ib leeg siv lead ua uas muaj cov ntsiab lus carbon tsim nyob rau hauv qhov tob ntawm lub ntiaj teb nyob rau hauv qhov kev txiav txim ntawm kev kub siab thiab kub. Muaj zog, tag nrho cov valence electrons koom nrog tsim covalent bonds, tsis muaj electrons dawb nyob, yog li lub hardness ntawm pob zeb diamond loj heev, lub hardness ntawm pob zeb diamond yog 4 npaug ntawm corundum thiab 8 npaug ntawm quartz!

Cov cuab yeej siv niaj hnub no tau ntev ntev tuaj yeem tsim cov pob zeb diamond ib leeg siv lead ua, thiab PCD siv cobalt thiab lwm yam hlau ua binders rau polycrystallize hluavtaws pob zeb diamond ib leeg siv lead ua hmoov rau hauv pob zeb diamond polycrystals nyob rau hauv tej yam kev mob. Lub hardness ntawm no polycrystalline pob zeb diamond (piv txwv li PCD) yog Txawm hais tias nws tsis nyuaj li ib lub pob zeb diamond, lub hardness tseem siab li 8000HV, uas yog 80 ~ 120 npaug ntawm cemented carbide! Ntxiv mus, cov thermal conductivity series ntawm PCD yog 700W / MK, uas yog 2 ~ 9 npaug ntawm cov cemented carbide, thiab txawm tias siab dua li ntawm PCBN thiab tooj liab. Yog li ntawd, siv cov khoom siv PCB raws li lub taub hau taub hau, lub tshav kub hloov ceev yog ceev heev thaum txiav. Tsis tas li ntawd, cov coefficient ntawm thermal expansion ntawm PCD cov khoom tsuas yog ib feem tsib ntawm cov cemented carbide, thiab cov coefficient ntawm kev sib txhuam tsuas yog ib feem peb ntawm cov cemented carbide. Cov khoom no txiav txim siab tias cov saw hniav siv cov khoom siv PCD raws li lub taub hau txiav yog sib npaug rau cov saw hniav lub cev. Nyob rau hauv tej yam kev mob, tsis tsuas yog lub neej kev pab cuam ntawm lub saw hniav yog theoretically tsawg kawg yog 30 lub sij hawm siab tshaj ntawm carbide pom hniav, tab sis kuj qhov zoo ntawm lub txiav nto yog zoo dua. Ntxiv mus, qhov kev sib raug zoo ntawm PCD cov ntaub ntawv thiab cov hlau tsis yog hlau thiab cov khoom tsis yog hlau yog me me. Thaum txiav cov hlau tsis-ferrous lossis cov ntaub ntawv tsis yog hlau, PCD cutter lub taub hau ntawm cov saw hniav kuj tsis tshua muaj kev sib txuas cov sawdust dua li lub taub hau carbide cutter. Thaum kawg, muaj lwm qhov kom zoo dua: cov khoom siv PCD muaj zog acid thiab alkali tsis kam, uas tseem muaj txiaj ntsig zoo rau kev ruaj ntseg ntawm PCD saw hniav.

PCD pom hniav yog siv cov cemented carbide raws li cov matrix rau PCD cov khoom ntawm ntau tshaj 1 hli, tsim ib tug ua ke los ntawm sintering los yog lwm yam xovxwm txheej txheem, thiab thaum kawg inlay nyob rau hauv lub alloy steel phaj lub cev ntawm cov saw hniav, thiaj li yuav hloov. cov khoom siv tawv nrog PCD cutter taub hau. Nws yog qhov txiav ntug ntawm cov saw hniav, uas zoo heev txhim kho cov kev pab cuam lub neej ntawm cov saw hniav thiab stability ntawm txiav zoo.

Tam sim no, ntau thiab ntau cov neeg siv saw saws xaiv siv PCD pob zeb diamond saw hniav nrog ultra-ntev kev pab cuam lub neej, uas yog tsuas yog siv nyob rau hauv rooj tog tsim kev lag luam, uas tsis yog-ferrous hlau ua kev lag luam uas nyuaj rau txiav, thiab aluminium alloy qhov rooj thiab qhov rais. manufacturers hloov cov qub carbide riam. Alloy saw hniav ntawm lub taub hau tsis tuaj yeem txiav tsis tu ncua ntev, tab sis kuj tsis tas yuav hloov cov saw hniav ntau zaus. Lub neej ntev, kev nkag siab, nws txo cov nqi txiav ntau piv nrog kev siv carbide saw hniav!