Vim li cas lub tshuab kev lag luam thiaj zoo li ntawm grey cam khwb cia hlau?
Grey cam khwb cia hlau yog siv hlau nrig nrog flake graphite. Vim tias cov ntaub ntawv no lov thaum qhov tawg yog tsaus grey, nws yog hu ua grey cam khwb cia hlau. Lub ntsiab ntawm cov nplaum nrig iron yog hlau, cov roj carbon, cov tshuaj tsw qab, manganese, sulphur thiab phosphorus. Nws yog cov feem ntau siv cov hlau nrum, thiab nws cov nyiaj tso tawm rau ntau tshaj 80% ntawm cov khoom tsim tawm hlau.
Zas tau hlau yog muab los ntawm kev ua haujlwm thiab kev coj ua kom tau qov txha, uas ua rau cov khoom siv dag zog, tshwj xeeb tshaj yog cov yas thiab lub zog, yog li ua kom muaj zog dua cov hlau. Zas tau hlau yog ib hom khoom siv hluav taws xob uas muaj hlau nplaum tsim nyob rau xyoo 1950. Nws muaj kev kawm zoo nyob ze rau ntawm cov hlau. Nws yog raws li nws cov kev ua tau zoo heev thiab tau zoo siv rau kev sib tw ua qee lub zog, lub zog, kev muaj zog thiab hnav kev ua haujlwm. Qhov chaw uas muaj kev cai ntau dua. Zas hlau tau sai tau tsim rau hauv plhaws siv pluaj hlau siv tom qab txho nrum hlau.
Cov castings ntawm cov khoom siv yog tsuas yog grey cam khwb cia hlau, tiam sis qhov kawg ntawm lub tshuab hluav taws xob thiab kev siv lub tshuab tshwj xeeb yuav siv cov luam yeeb hlau, tiam sis tus nqi ntawm cov pa luam yeeb kuj kim heev dua li grey cam khwb cia hlau.
Qhov txawv ntawm cam khwb cia hlau thiab hlau luam
● Graphite puab. Lub graphite nyob rau hauv lub grey cam khwb cia hlau qauv tshwm sim nyob rau hauv daim ntawv ntawm flakes, thiab lub graphite nyob rau hauv lub zas cam casting qauv muaj nyob rau hauv ib cheeb tsam spherical.
● Kev sib txawv. Cov nplaim hluav taws xob hauv lub grey cam khwb cia hlau ntxig rau hauv qhov hnyav, ua rau muaj kev nyuab siab, ua rau tsis muaj zog thiab zoo nkauj, brittleness loj, tab sis kev vibration zoo tho kev ua haujlwm. Nws yog tsuas yog siv los tsim ntau yam khoom, qhov hauv paus, thiab lwm yam, uas tsis tas yuav tsum muaj zog rau siab thiab feem ntau yog muaj kev ntxhov siab, xws li cov me me thiab nruab nrab lub hauv paus ua haujlwm thiab qhov xaus.
Lub spherical graphite hauv zas nrum hlau muaj qhov qis tshaj qhov nyhuv ntawm qhov matrix thiab qhov tsawg tshaj plaws kev nyuab siab concentration, yog li nws lub zog yog siab heev, nws yuav piv nrog cov nruab nrab carbon steel, tau siab exert qhov kev kawm ntawm matrix, thiab muaj certain plasticity thiab zoo toughness. Nws yog feem ntau siv los ua tej yam uas muaj siab toughness thiab complex daim, thiab nws qhov kev ua yeeb yam casting zoo tshaj hlau. Xws li sab hauv lub tshuab ua kom tiav hauv lub cav crankshafts, txuas cov hlua thiab cov zoo li.
● Kev Ua Tau Zoo. Cov hlau luam yeeb kuj feem ntau yog cua sov kho rau qhov cuab tam, thaum grey cam khwb cia yog feem ntau tsis kho kom sov zog. Piv nrog hlau cam, hlau zas tau muaj kev kom zoo dua rau lub zog. Lub zog tensile ntawm hlau luam yog 60 k, thaum lub zog tensile ntawm cam khwb cia hlau yog tsuas 31k. Cov paib lub zog ntawm cov luam yeeb hlau yog 40 k, thaum cov cam khwb cia hlau tsis qhia tawm dag zog thiab nws qhov xaus. Zas tau hlau yog ntau zog tshaj cam khwb cia hlau.
● Corrosion kuj. Cov luam yeeb hlau yog tib yam li cov hlau cam khwb cia hlau xeb vim corrosion kuj.
Yog tias koj xav yuav ib lub cav ua khoom siv hauv tsev, thov saib xyuas kom Hwjchim Tsav Tsheb thiab Mini Tsav Tsheb.
