Yuav ua li cas los txhim kho cov cuab yeej cuab tam ntawm cam khwb cia grey hlau?
Grey cam khwb cia hlau yog hlau-carbon alloy nyob rau hauv uas seem nto yog grey. Los ntawm kev tswj cov muaj pes tsawg leeg thiab cov txheej txheem solidification, cov pa roj carbon feem ntau tshwm nyob rau hauv daim ntawv ntawm flake graphite. Cov qauv metallographic ntawm grey cam khwb cia hlau yog tsim los ntawm flake graphite, hlau matrix thiab grain ciam teb eutectic.
Lub hav zoov ntawm flake graphite hauv grey cam khwb cia hlau rhuav tshem qhov yooj yim txuas ntxiv ntawm cov hlau thiab ua rau grey cam khwb cia hlau cov khoom siv nkig. Tab sis grey cam khwb cia hlau yog ib qho ntawm thawj thiab feem ntau siv hlau cov ntaub ntawv.Grey cam khwb cia hlau castingsmuaj ntau yam khoom. Tau ntev, hauv kev xyaum ua ntau lawm, peb tau sau tseg qee qhov kev ntsuas los txhim kho lub zog tensile ntawm grey cam khwb cia hlau. Hauv qee qhov xwm txheej, peb tuaj yeem txhim kho qhov kev ua tau zoo, hnav tsis kam thiab kev poob siab kev ua haujlwm ntawm grey cam khwb cia hlau.
Hauv qhov tseeb casting ntau lawm, feem ntau ntawm grey cam khwb cia hlau yog hypoeutectic. Yog li ntawd, txhawm rau txhim kho nws lub zog tensile, cov ntsiab lus hauv qab no yuav tsum tau ua kom ntau li ntau tau:
1) Guarantee lub grey cam khwb cia hlau muaj ntau thiab ntau tsim thawj austenite dendrites thaum solidification
2) Txo tus nqi ntawm eutectic graphite thiab ua kom nws sib npaug nrog cov nplua A-hom graphite
3) Ua kom muaj pes tsawg tus eutectic pawg
4) Thaum lub sij hawm austenite eutectoid transformation, tag nrho cov hloov mus rau hauv ib tug zoo pearlite matrix
Nyob rau hauv qhov tseeb zus tau tej cov grey cam khwb cia hlau castings, peb feem ntau siv cov nram qab no ntsuas kom ua tau raws li cov saum toj no:
1) Xaiv cov tshuaj muaj pes tsawg leeg tsim nyog
2) Hloov cov ntsiab lus ntawm tus nqi
3) Overheated hlau molten
4) Inoculation kev kho mob
5) Kab los yog tsawg alloying
6) Kev kho cua sov
7) Ua kom cov cua txias thaum lub sij hawm hloov eutectoid
Cov kev ntsuas tshwj xeeb yuav tsum tau ua nyob ntawm seb hom grey cam khwb cia hlau castings, cov khoom yuav tsum tau ua thiab cov kev tsim khoom tshwj xeeb. Txawm li cas los xij, feem ntau yuav tsum tau siv ob lossis ntau qhov kev ntsuas kom ua tiav qhov kev xav tau ntawm cov hlau cam khwb cia.
Post lub sij hawm: Dec-28-2020