Nyob rau hauv cov txheej txheem complex ntawm lub foundry kev lag luam,ferrosilicon 75Tau dhau los ua qhov tsis tseem ceeb thiab cov khoom tseem ceeb nrog nws cov tshuaj tshwj xeeb thiab cov khoom siv lub cev. Qhov ferro alloy nrog cov ntsiab lus silicon ntawm txog li 75% yog kev sib txuas lus tseem ceeb hauv kev sib txuas, thiab muaj qhov cuam tshuam zoo ntawm qhov zoo ntawm cov cuab yeej thiab ntau lawm.
Deoxidation: lub hauv paus ntawm ensuring qhov zoo ntawm cov cuab yeej
Thaum lub sij hawm cov txheej txheem casting, cov hlau molten yog yooj yim heev kom hnov mob nrog cov pa roj oxygen, uas yuav cuam tshuam rau cov tshuab oxide, uas yuav cuam tshuam rau cov khoom siv oxygen, uas yuav cuam tshuam rau cov neeg kho tshuab thiab qhov chaw zoo ntawm cov duab castings. Raws li kev ua tau zoodeoxidizer, Ferro Silicon 75 tuaj yeem hnov cov pa roj oxygen nyob rau hauv molten hlau los tsim cov silicon dioxide (sitio₂). Noj grey cam khwb cia hlau casting ua ib qho kev ua piv txwv, tom qab ntxiv tus nqi tsim nyog ntawm ferrosilicon75, txo cov tshwm sim ntawm kev tsis xws luag xws li pores thiab shrinkage. Kev tshawb fawb cov ntaub ntawv qhia tau tias kev siv 75 # ferrosilicon deoxidation tuaj yeem txo tus nqi ntawm cov khoom siv los ntawm kev sib tw los ntawm kev sib tw ntawm cov khoom lag luam tsim nyog.
Inoculation: Ua kom pom cov qauv ntawm cov khoom siv
Inoculation kev kho yog txhais tau tias yog kev txhim kho cov qauv thiab kev ua tau zoo ntawm cov castings, thiab 75% ferrosilicon plays lub luag haujlwm tseem ceeb hauv nws. Nws tuaj yeem txhawb cov duab graphitization, ua kom cov nplej, thiab ua cov khoom pov tseg tau txais cov khaub ncaws ntxiv thiab cov qauv tuab. Hauv kev tsim cov hlau, ferrosilicon 75% ntxiv ua kom muaj txiaj ntsig zoo ntawm cov pob zeb dawb, thiab txhim kho cov khoom siv tshuab hluav taws xob dawb ntawm cov cuab yeej. Piv txwv li, lub zog tensile ntawm cov hlau khi nrog 75 # FESI tuaj yeem nce los ntawm 10% {%, thiab kev mus elongation kuj tseem tuaj yeem txhim kho. Nyob rau tib lub sijhawm, 75% FESI kuj tseem tuaj yeem txhim kho cov tshuaj pleev xim Molten, kom tsis txhob muaj qhov tsis txaus ntseeg thiab tsis txaus ntseeg, uas yog qhov tshwj xeeb rau kev tsim cov duab ua ke nrog cov duab sib xyaw.
Alloying: muab cov khoom pov thawj
Ntxiv rau deoxidation thiab inoculation, ferrosilicon 75 tseem tuaj yeem muab ntxiv rau cov hlau molten ua ib qho txheej txheem sib xws thiab muab cov khoom pov tseg. Silicon yog ib qho ntawm cov ntsiab tseem ceeb ntawm cov hlau. Ntxiv Ferrosilicon No. 75 tuaj yeem txhim kho lub zog, hardness thiab hnav tsis kam ntawm cov hlau. Thaum ua cov thawv siab nrag hlau, qhov nce hauv cov hlau nrum ua kom muaj cov khoom siv ua kom zoo, thiab yog siv hluav taws xob, thermal raj thiab lwm daim teb. Ib qho ntxiv, hauv qhov Casting ntawm qee cov aluminium alloys, ntxiv qhov tsim nyog ntawmFesi 75tuaj yeem txhim kho qhov kev ua tau zoo sib xyaw thiab cov khoom siv tshuab ntawm alloys alloys, xws li kev txhim kho fluidity thiab thermal tawg tsis kam ntawm aluminium alloys, thiab txhim kho lawv lub hardness thiab lub zog.
Kev Lag Luam Kev Tsim Kho Kev Lag Luam thiab Ntawv Thov Kev Pab Cuam
Raws li kev lag luam casting tsim kev lag luam siab thiab precision, qhov zoo thiab kev ua tau zoo ntawm ferrosilicon 75 tseem yuav tau txais siab dua thiab siab dua. Tam sim no, kev lag luam ntau lawm tau txhim kho cov txheej txheem ntau lawm los txhim kho cov kev coj dawb huv thiab kev ruaj khov ntawm ferrosilicon 75 kom tau raws li cov neeg siv khoom sib txawv. Nyob rau tib lub sijhawm, tsav los ntawm lub tswv yim kev tiv thaiv hluav taws xob thiab kev tiv thaiv ib puag ncig, kev siv hluav taws xob ntau ntxiv ntawm 75ferrosilicon kuj tau los tshawb nrhiav hotspots. Nyob rau hauv lub neej tom ntej, nws yuav ua lub luag haujlwm tseem ceeb dua hauv cov cuab yeej siv siab tsim, aerospace thiab lwm txoj chaw nyob hauv kev lag luam nrhiav tau txuas ntxiv.
Hauv cov ntsiab lus, ferrosilicon 75 ua si ntau lub luag haujlwm hauv kev txhim kho ntawm kev txhim kho ntawm cov txheej txheem, thiab ua kom zoo dua qub cov txheej txheem thiab txhawb kev txhim kho ntawm kev lag luam. Txawm hais tias nyob rau hauv cov ib txwm pom muaj kev pom zoo siab pom kev lag luam siab,
