Qee lub sij hawm dhau los, ib tus neeg siv khoom tau tshaj tawm tias muaj ntxhiab tsw heev thaum siv pob zeb diamond sib tsoo log. Lawv hais tias tus ntxhiab tsw muaj zog thiab khaus khaus, tsis zoo li kev siv yav dhau los, thiab piav qhia zoo li lawv tab tom raug tshuaj lom.
Raws li kev tshawb nrhiav, peb tau kawm tias cov neeg siv khoom ib txwm siv kev sib tsoo ntub dej los ua cov tungsten carbide workpieces. Tom qab txiav txim tawm cov teeb meem nrog cov kua txiav, peb pom tias thawj qhov kev siv yog nyob rau hauv lub rhiav dav, thaum lub thib ob siv, nrog ib tug sib txawv resinoid pob zeb diamond sib tsoo log, nyob rau hauv ib tug kuj confined qhov chaw.
Muaj pes tsawg leeg ntawm resinoid pob zeb diamond sib tsoo log
Peb paub tias, ntxiv rau pob zeb diamond raw cov ntaub ntawv, resinoid pob zeb diamond sib tsoo lub log feem ntau muaj phenolic resin thiab lwm yam khoom siv. Phenolic resin yog tsim los ntawm phenol thiab formaldehyde. Thermosetting phenolic resin yog ib qho me me -molecule resin, thiab ntau tshaj ntawm formaldehyde yog siv thaum lub sij hawm synthesis. Yog tias tsis ua tiav zoo, cov resin yuav muaj ntau ntawm formaldehyde. Txhawm rau ua kom lub thermosetting resin, phenol thiab lwm cov phenolic compounds raug ntxiv los ua cov tshuaj tua kab mob. Cov khoom no yuav volatilize thiab tsim teeb meem gases thaum lub sij hawm cua sov txheej txheem.
Phenolic resin, tseem hu ua Bakelite los yog Bakelite hmoov, yog Ameslikas tsis muaj xim lossis yellowish -xim av pob tshab. Txawm li cas los xij, nws feem ntau muag muag nrog cov xim ntxiv, ua rau liab, daj, dub, ntsuab, xim av, xiav, thiab lwm yam xim. Nws muaj nyob rau hauv granular thiab hmoov cov ntaub ntawv. Nws yog resistant rau qaug zog acids thiab bases, tab sis decomposes nyob rau hauv muaj zog acids thiab corrodes nyob rau hauv muaj zog bases. Nws yog insoluble hauv dej tab sis soluble hauv cov kuab tshuaj organic xws li acetone thiab cawv. Nws yog tau los ntawm condensation polymerization ntawm phenol los yog nws derivatives.
Khoom phenolic resin yog daj, pob tshab, amorphous khoom. Nws tshwm me ntsis reddish vim muaj cov phenol dawb. Nws lub ntiajteb txawj nqus yog kwv yees li 1.7. Nws yooj yim soluble hauv cawv tab sis insoluble hauv dej, thiab ruaj khov hauv dej, tsis muaj zog acid, thiab tsis muaj zog alkali daws. Cov resin no yog tsim los ntawm polycondensation ntawm phenol thiab formaldehyde nyob rau hauv catalytic tej yam kev mob, ua raws li neutralization thiab ntxuav. Nyob ntawm cov catalyst siv, nws tuaj yeem faib ua ob hom: thermosetting thiab thermoplastic. Phenolic resin muaj cov kua qaub zoo heev, cov khoom siv kho tshuab, thiab cov cua sov ua haujlwm, thiab yog siv dav hauv kev tsim hluav taws xob tiv thaiv corrosion, nplaum, nplaim hluav taws- cov ntaub ntawv retardant, thiab kev sib tsoo log, thiab lwm yam kev lag luam.
Cov kua phenolic resins yog daj rau cov kua dej tsaus; Piv txwv li, alkaline phenolic resins feem ntau yog siv los ua cov binders.
Cov ntsiab lus ntawm cov khoom tseem ceeb ntawm phenolic resins
1. Siab -Tsub Ua Haujlwm
Cov yam ntxwv tseem ceeb tshaj plaws ntawm phenolic resin yog nws qhov siab -kub tsis kam. Txawm nyob rau ntawm qhov kub thiab txias heev, nws tuav nws cov qauv kev ncaj ncees thiab qhov seem stability. Vim li no, phenolic resin yog siv nyob rau hauv siab - daim ntawv thov kub xws li cov ntaub ntawv refractory, cov ntaub ntawv sib txhuam, cov nplaum, thiab hauv kev lag luam foundry.
2. Kev sib khi muaj zog
Ib qho tseem ceeb daim ntawv thov ntawm phenolic resin yog raws li ib tug nplaum. Phenolic resin yog cov khoom siv ntau yam uas tau sib xws nrog ntau yam organic thiab inorganic fillers. Tsim kom raug phenolic resins nthuav qhia tshwj xeeb ceev wetting speeds. Tom qab hla - txuas, lawv tuaj yeem muab cov khoom tsim nyog, kev ua haujlwm kub, thiab cov khoom siv hluav taws xob rau cov khoom abrasives, refractories, cov ntaub ntawv sib txhuam, thiab cov hmoov bakelite.
Dej-soluble lossis cawv-cov phenolic resins yog siv los ua cov ntawv, paj rwb, iav, asbestos, thiab lwm yam ntaub ntawv zoo sib xws los muab cov khoom siv dag zog, hluav taws xob, thiab lwm yam. Cov piv txwv muaj xws li hluav taws xob rwb thaiv tsev thiab cov tshuab laminate manufacturing, clutch phaj, thiab cov ntawv lim rau tsheb lim.
3. High Carbon Residue Rate
Nyob rau hauv inert gas tej yam kev mob ntawm kwv yees li 1000 degree, phenolic resins tsim ib tug siab carbon residue, uas yuav pab tswj cov txheej txheem stability ntawm phenolic resin. Cov yam ntxwv ntawm phenolic resin no kuj yog ib qho tseem ceeb vim li cas nws tuaj yeem siv rau hauv cov khoom siv refractory.
4. Cov pa luam yeeb tsawg thiab muaj toxicity tsawg
Piv nrog rau lwm cov txheej txheem resin, phenolic resin systems muaj qhov zoo ntawm cov pa luam yeeb tsawg thiab tsis muaj tshuaj lom. Nyob rau hauv combustion tej yam kev mob, phenolic resin tshuab tsim nrog scientific formulations yuav maj mam decompose los tsim hydrogen, hydrocarbons, dej vapor, thiab carbon oxides. Cov pa luam yeeb uas tsim thaum lub sij hawm decomposition yog tsawg, thiab cov toxicity kuj tseem tsawg. Cov yam ntxwv no ua rau cov phenolic resins haum rau pej xeem kev thauj mus los thiab thaj chaw uas muaj kev ruaj ntseg nruj heev, xws li mines, guardrails, thiab kev tsim kho kev lag luam.
5. Tshuaj tiv thaiv
Hla - txuas phenolic resins tuaj yeem tiv thaiv kev puas tsuaj los ntawm ntau yam tshuaj lom neeg, xws li roj av, roj av, cawv, ethylene glycol, roj, thiab ntau yam hydrocarbons. Vim nws cov tshuaj lom neeg ruaj khov, nws yog qhov tsim nyog rau kev ua cov khoom siv hauv chav ua noj thiab chav dej, cov khoom siv lim dej haus (phenolic carbon fiber), bakelite tshuaj yej tais thiab tshuaj yej teeb, thiab tau siv dav hauv cov khoom ntim khoom noj thiab dej haus xws li cov kaus poom thiab yooj yim - qhib cov kaus poom (National Standard GB 05009.069-2003) thiab kua ntim.
6. Kev kho cua sov
Kev kho cua sov ua kom cov iav hloov pauv kub ntawm cov khoom kho, uas tuaj yeem txhim kho ntau yam khoom ntawm cov resin. Cov iav hloov pauv kub zoo ib yam li lub xeev melting ntawm crystalline solids xws li polypropylene. Thawj zaug iav hloov kub ntawm phenolic resin muaj feem xyuam rau qhov kub thiab txias siv nyob rau hauv thawj theem curing. Cov txheej txheem kev kho cua sov tuaj yeem ua kom cov dej ntws tawm ntawm tus ntoo khaub lig-txuas txuas, txhawb cov tshuaj tiv thaiv ntxiv, thiab tseem tuaj yeem tshem tawm cov phenols uas tsis muaj zog, txo qhov shrinkage, thiab txhim kho qhov ruaj khov, hardness, thiab siab - qhov kub thiab txias. Nyob rau tib lub sijhawm, cov resin kuj zoo li ntsws thiab ua nkig. Cov ntawv tshaj tawm- kho cua sov nkhaus ntawm cov resin yuav nyob ntawm qhov pib kho mob thiab cov txheej txheem resin.
7. Foaming Properties
Phenolic ua npuas ncauj yog ib hom foamed yas tau los ntawm foaming phenolic resin. Piv nrog rau cov ntaub ntawv thaum ntxov xws li polystyrene ua npuas ncauj, polyvinyl chloride ua npuas ncauj, thiab polyurethane ua npuas ncauj, uas yog dominated lub lag luam, nws muaj tshwj xeeb zoo heev nplaim taws- retardant zog. Nws yog lub teeb yuag, nruj heev, muaj qhov ruaj khov zoo, tiv taus tshuaj lom neeg corrosion, muaj hluav taws kub zoo, yog nplaim hluav taws- retardant, tus kheej- tua, ua pa taws tsawg, tiv taus nplaim taws, tsis drip thaum raug hluav taws, thiab pheej yig. Yog li ntawd, nws yog ib qho zoo tagnrho rwb thaiv tsev thiab cov khoom txuag hluav taws xob rau kev lag luam xws li cov khoom siv hluav taws xob, cov cuab yeej siv, kev tsim kho, thiab petrochemicals, thiab tau txais kev saib xyuas dav.
Phenolic ua npuas ncauj tau dhau los ua ib qho sai tshaj plaws - hom foamed plastics loj hlob. Kev noj haus yog nce zuj zus, daim ntawv thov ntau yam txuas ntxiv nthuav dav, thiab kev tshawb fawb thiab kev txhim kho tau zoo heev nyob rau hauv thiab thoob ntiaj teb. Txawm li cas los xij, qhov tsis muaj zog tshaj plaws ntawm phenolic ua npuas ncauj yog nws cov brittleness siab thiab qhib siab - cell ratio; Yog li ntawd, kev txhim kho nws cov toughness yog ib qho tseem ceeb thev naus laus zis rau kev txhim kho kev ua haujlwm ntawm phenolic ua npuas ncauj.
Hauv cov ntsiab lus, nws yog ib txwm ua rau qee qhov tsw yuav tsum tau ua thaum lub sij hawm sib tsoo siv cov pob zeb diamond sib tsoo pob zeb. Nws yog qhov zoo tshaj plaws los siv cov kev sib tsoo ntub dej thaum ua haujlwm kom txo qhov kub ntawm cov pob zeb diamond sib tsoo log, txo cov kev xav thiab volatilization. Kev sib tsoo qhuav yuav tsim cov pa roj ntau dua, yog li nws yog qhov tseem ceeb los xyuas kom muaj qhov cua zoo hauv lub rhiav kom tau txais kev nyab xeeb ntawm cov neeg ua haujlwm!
