Hlau casting yog ib qho txheej txheem qub uas tau ua qhov tseem ceeb rau tib neeg kev vam meej rau ntau pua xyoo. Los ntawm kev tsim cov sculptures intricate mus rau tsim complex industrial qhov chaw, hlau casting plays lub luag hauj lwm tseem ceeb nyob rau hauv ntau yam industries.
Silicon, ib lub ntsiab lus feem ntau cuam tshuam nrog kev siv thev naus laus zis, yog ib qho tseem ceeb tshaj plaws rau tib neeg. Feem ntau siv los ua aluminium-
silicon alloysthiab
ferrosilicon(hlau-silicon) alloys, nws kuj tseem muaj feem cuam tshuam rau cov txheej txheem hlau casting. Tuam Tshoj, Russia, Norway, thiab Brazil yog cov neeg tsim khoom loj tshaj plaws ntawm silicon minerals. Nyob rau hauv tsab xov xwm no, peb yuav siv sij hawm tob tob rau hauv kev siv cov silicon hauv cov hlau casting, tshawb txog nws cov khoom, kev siv, thiab txoj kev uas nws txhim kho cov txheej txheem casting.
Nkag siab txog Silicon hauv Hlau Casting
Silicon yog cov khoom siv ntau yam uas tau siv dav hauv cov hlau casting vim nws cov khoom tshwj xeeb. Thaum alloyed nrog hlau xws li txhuas, tooj liab, thiab hlau, silicon txhim khu lub zog, hardness, thiab corrosion kuj ntawm cov hlau alloy. Cov cuab yeej kho kom zoo dua qub no ua rau cov khoom siv silicon tshwj xeeb muaj txiaj ntsig hauv kev lag luam uas muaj kev ua haujlwm ntev thiab kev ua haujlwm tseem ceeb.
Vim li cas Silicon thiaj haum rau hlau Casting
Siab Melting Point: Silicon muaj lub siab melting point, ua rau nws haum rau high-temperature daim ntaub ntawv xws li hlau casting.
Tsawg Thermal Expansion: Silicon muaj cov cuab yeej thermal expansion tsawg, uas yuav pab txo qhov kev pheej hmoo ntawm thermal stress thaum lub sij hawm casting txheej txheem.
Zoo fluidity: Silicon txhim kho cov fluidity ntawm molten hlau, cia nws ntws yooj yim dua rau hauv cov pwm thiab kab noj hniav.
Ua kom muaj zog: Silicon tsub kom lub zog thiab hardness ntawm cov hlau alloys, ua rau lawv zoo tagnrho rau cov ntawv thov uas yuav tsum tau muaj zog txhua yam khoom.
Kev siv ntawm Silicon hauv Hlau Casting
1.
Aluminium Casting: Silicon feem ntau yog siv rau hauv aluminium casting los txhim kho cov khoom siv ntawm cov hlau. Aluminium-silicon alloys yog lub teeb yuag thiab muaj kev tiv thaiv zoo heev, ua rau lawv zoo tagnrho rau kev siv aerospace thiab tsheb.
2.
Cast Iron: Nyob rau hauv cam khwb cia hlau, silicon yog ntxiv rau grey hlau los txhawb kev tsim ntawm graphite flakes, uas txhim kho cov khoom siv machinability thiab damping zog. Silicon kuj txhim kho qhov hnav tsis kam ntawm ferroalloys.
3.
Cast Hlau: Silicon yog siv hauv cam khwb cia hlau los deoxidize cov hlau molten thiab txhim kho nws cov fluidity. Silicon kuj pab tswj cov qoob loj ntawm cov hlau, ua rau muaj zog dua, hloov tau yooj yim dua.
Lub luag haujlwm ntawm Silicon hauv Kev Txhim Kho Cov Txheej Txheem Casting
Txhim kho fluidity: Silicon txhim kho cov fluidity ntawm cov hlau molten, tso cai rau nws yooj yim sau cov pwm kab noj hniav. Cov cuab yeej no yog qhov tseem ceeb rau kev ua tiav cov txheej txheem thiab cov ncauj lus kom ntxaws.
Txo Shrinkage: Ntxiv silicon rau cov hlau alloys pab txo qis qhov tsis xws luag hauv cov castings, xyuas kom meej qhov tseeb thiab txo qhov xav tau rau kev siv tshuab ntxiv.
Txhim kho Machinability: Machinability yog yooj yim rau txheej txheem. Cov cuab yeej no muaj txiaj ntsig tshwj xeeb hauv cov ntawv thov uas yuav tsum tau ua tom qab casting machining.
Kev sib tw thiab kev txiav txim siab
Thaum silicon muaj ntau qhov zoo hauv cov hlau casting, kuj tseem muaj qee qhov kev sib tw los xav txog:
1. Brittleness: siab dhau ntawm cov ntsiab lus silicon tuaj yeem ua rau alloy brittleness, uas tuaj yeem cuam tshuam nws cov khoom siv kho tshuab. Tsim kom muaj hlau alloy thiab kev tswj cov ntsiab lus ntawm silicon yog qhov tseem ceeb los tiv thaiv qhov teeb meem no.
2. Porosity: Yog tias tsis tswj kom zoo, silicon tuaj yeem ua rau muaj kev pheej hmoo ntawm porosity hauv castings. Ua tib zoo machining thiab nruj tswj kev ntsuas yuav tsum tau ua kom txo qis porosity.
3. Nqi: Silicon yog ib qho khoom kim heev uas cuam tshuam rau tag nrho cov nqi ntawm kev tsim cov silicon-muaj alloys. Kev txheeb xyuas tus nqi-cov txiaj ntsig yog qhov tseem ceeb los txiav txim siab qhov ua tau ntawm kev siv silicon hauv cov ntawv thov tshwj xeeb casting.
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