Hauv kev tsim kho thiab kev lag luam, granite yog dav siv vim nws hardness, ntom, acid thiab alkali tsis kam, thiab huab cua tsis kam. Cov nram qab no yog cov ncauj lus kom ntxaws tsom xam rau koj seb cov xim ntawm granite cuam tshuam nws qhov ntom thiab yuav ua li cas xaiv granite ruaj khov nyob rau hauv kev lag luam precision khoom.
Kev sib raug zoo ntawm cov xim thiab ntom ntawm granite
Granite feem ntau yog tsim los ntawm cov zaub mov xws li quartz, feldspar thiab mica, thiab nws cov xim nyob ntawm hom thiab ntau ntawm cov khoom uas nws muaj. Los ntawm qhov kev xav ntawm qhov ntom ntom, muaj qee qhov kev sib txuas ntawm cov xim thiab qhov ntom ntom, tab sis nws tsis yog kev sib raug zoo ncaj qha.
Mineral muaj pes tsawg leeg sib txawv: Lub teeb-xim granite, xws li greyish-dawb thiab nqaij-liab, feem ntau nplua nuj nyob rau hauv quartz thiab feldspar. Ob qho minerals no muaj qhov ntom ntom thiab ruaj khov. Qhov ceev ntawm quartz yog li ntawm 2.6 mus rau 2.7g / cm³, thaum lub feldspar txawv ntawm 2.5 mus rau 2.8g / cm³ nyob ntawm seb hom. Kev nplua nuj ntawm cov zaub mov zoo li no ua rau muaj kev nce siab nyob rau hauv tag nrho cov ntom ntom ntawm lub teeb xim granite. Tsaus granite, xws li dub thiab ntsuab, feem ntau muaj cov hlau thiab magnesium cov ntxhia hauv cov ntxhia pob zeb xws li amphibole thiab biotite. Qhov ceev ntawm amphibole yog kwv yees li 3.0-3.4g / cm³, thiab biotite yog li ntawm 2.7-3.1g / cm³. Txawm li cas los xij, thaum tsaus ntuj granite muaj ntau cov hlau hnyav (xws li hlau thiab manganese), nws qhov ceev yuav nce.
Qib ntawm crystallization thiab cov yam ntxwv cuam tshuam: Xim tuaj yeem cuam tshuam qhov sib txawv ntawm cov qib crystallization thiab cov qauv ntawm granite. Granite nrog qib siab ntawm crystallization thiab ntom qauv muaj cov xim zoo ib yam thiab ruaj khov, thiab nws qhov ntom kuj tseem siab. Qhov no yog vim hais tias cov ntxhia hais tau zoo sib xws thiab muaj qhov loj ntawm ib chav tsev ntim. Granite nrog cov crystallization tsis zoo thiab cov qauv xoob tuaj yeem muaj cov xim tsis sib xws, ntau cov voids sab hauv, thiab qhov ntom ntom.
Granite xaiv nyob rau hauv kev lag luam precision khoom
Nyob rau hauv lub tshav pob ntawm industrial precision khoom, qhov kev ruaj ntseg yuav tsum tau rau granite yog siab heev. Feem ntau, qhov tsim nyog granite yog xaiv los ntawm kev xav txog ntau yam:
Mineral muaj pes tsawg leeg thiab cov qauv: Granite nrog cov ntsiab lus siab thiab kev faib tawm ntawm quartz thiab feldspar yog nyiam. Hom granite no muaj cov qauv ruaj khov, uas tuaj yeem txo qhov deformation los ntawm kev hloov pauv hauv kev ntxhov siab thiab ua kom lub sijhawm ntev ruaj khov ntawm cov khoom siv. Lub caij no, granite nrog rau qib siab ntawm crystallization, nplua thiab cov khoom sib xws, thiab cov qauv ntom ntom yog qhov kev xaiv. Thaum siv lub sijhawm ntev thiab kev siv dag zog, nws tuaj yeem tswj tau qhov raug thiab txo qhov cuam tshuam ntawm nws tus kheej cov kev hloov pauv ntawm cov khoom raug.
Lub cev ntsuas kev ua tau zoo: Granite yuav tsum muaj qhov nqus dej tsawg, feem ntau tsawg dua 0.5%, tiv thaiv cov teeb meem xws li ntim nthuav dav thiab lub zog txo los ntawm kev nqus dej, uas tuaj yeem cuam tshuam qhov tseeb ntawm cov khoom siv. Lub coefficient ntawm thermal expansion yuav tsum tsawg. Qhov zoo tshaj plaws, nws yuav tsum tsawg dua 8 × 10⁻⁶ / ℃ kom txo qhov kev hloov pauv los ntawm qhov kub thiab txias. Tsis tas li ntawd, lub zog compressive yuav tsum siab, feem ntau ntau dua 150MPa, kom ntseeg tau tias nws tuaj yeem tiv taus ntau lub zog thaum lub sijhawm ua haujlwm ntawm cov khoom siv.
Cov ntau yam pom zoo: Jinan Green Granite, Indian Dub, South African Dub thiab lwm yam dub granite, uas feem ntau tsaus nti xim, ntom hauv cov qauv, muaj cov coefficient ntawm thermal expansion thiab zoo hnav tsis kam, thiab haum rau lub hauv paus ntawm optical soj ntsuam cov khoom uas tsis tshua muaj siab yuav tsum tau rau precision thiab stability. Sesame dawb granite, nrog lub teeb xim, cov ntxhia ntxhia tsis sib xws, thiab siab hardness thiab lub zog, yog siv dav hauv cov khoom siv hluav taws xob chip tsim thiab tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm kev ua haujlwm siab thiab kev ua haujlwm ntev ntawm cov khoom siv.
Hauv kev xaus, txawm hais tias muaj qee qhov kev sib raug zoo ntawm cov xim thiab qhov ntom ntawm granite, thaum xaiv granite nyob rau hauv kev lag luam precision khoom, nws yog ib qho tsim nyog yuav tsum tau ua tib zoo xav txog ntau yam xws li ntxhia muaj pes tsawg leeg, qauv, thiab lub cev muaj zog kom ntseeg tau qhov siab thiab ruaj khov ntawm cov khoom siv.
Post lub sij hawm: May-19-2025