Cov Lim Dej Ua Npuas Ncauj Ua Los Ntawm Cov Khoom Siv ...

Yog tias koj nyob hauv kev ua hlau casting, koj paub tias kim npaum li cas cov qhov tsis zoo xws li porosity, inclusions, lossis cracks tuaj yeem kim heev.Cov Lim Ua Npuas Ncauj Ua Los Ntawm Cov Khoom Siv ... (CFF) tsis yog tsuas yog "cov lim dej" xwb - lawv yog ib qho cuab yeej tseem ceeb los ntxuav cov hlau uas yaj, txhim kho kev ua haujlwm ntawm kev casting, thiab txiav cov khib nyiab tsim khoom. Tab sis lawv siv rau dab tsi tiag? Cia peb rhuav tshem lawv cov ntawv thov tseem ceeb los ntawm kev lag luam thiab hom hlau, yog li koj tuaj yeem pom tias lawv haum rau koj txoj haujlwm li cas.​

1. Kev Ua Hlau Tsis Yog Hlau: Ua kom Aluminium, Tooj Liab, Zinc Castings zoo kawg nkaus

Cov hlau uas tsis yog hlau (txhuas, tooj liab, zinc, magnesium) yog siv dav hauv tsheb, khoom siv hluav taws xob, thiab cov kav dej—tab sis lawv cov yaj yooj yim muaj cov oxide thiab cov pa roj npuas. Cov lim dej ua los ntawm cov khoom siv ua npuas ncauj kho qhov no los ntawm kev ntes cov khoom tsis huv ua ntej lawv mus txog pwm.​

Cov kev siv tseem ceeb ntawm no:

Kev Ua Txhuas (qhov loj tshaj plaws uas tsis yog hlau siv):

Cov lim dej tshem tawm Al₂O₃ oxides thiab cov khib nyiab me me ntawm cov txhuas uas yaj, ua kom cov castings du thiab muaj zog. Zoo meej rau:

Qhov chaw pib:Cov log tsheb, cov thaiv cav, cov qhov rooj kis (yog muaj qhov tsis zoo tsawg dua txhais tau tias siv tau ntev dua).​

Cov khoom siv dav hlau:Cov hlau txhuas sib dua rau cov thav dav hlau (xav tau hlau ntshiab heev).

Cov khoom siv rau cov neeg siv khoom:Cov khoom siv ua noj ua haus txhuas, cov plhaub laptop (tsis muaj qhov tsis zoo ntawm qhov chaw).

Kev Ua Tooj Liab thiab Tooj Liab:

Ntxeev cov sulfide inclusions thiab refractory fragments, tiv thaiv kom tsis txhob xau rau hauv:​

Cov khoom siv dej:Cov li qub, cov khoom sib txuas, cov kav dej (tseem ceeb rau kev ua haujlwm tsis pub dej nkag).

Cov khoom siv hluav taws xob:Cov khoom siv sib txuas tooj dag, cov qhov (tooj liab ntshiab ua kom muaj kev sib kis tau zoo).

Kev siv zinc thiab magnesium casting:

Cov lim dej tswj cov oxide buildup hauv high pressure die casting (HPDC) rau:​

Khoom Siv Hluav Taws Xob:Cov thawv xov tooj zinc alloy, cov thav duab laptop magnesium (phab nyias nyias tsis tas yuav muaj qhov tsis zoo).

Kho vajtse:Cov tes qhov rooj ua los ntawm zinc, cov khoom siv hluav taws xob ua los ntawm magnesium (zoo ib yam).

2. Kev Txhaj Hlau Ferrous: Kho Hlau, Hlau Txhaj Rau Kev Siv Hnyav

Cov hlau ferrous (hlau, hlau cam khwb cia) kov yeej kev ntxhov siab heev—tab sis lawv cov kub yaj (1500°C+) xav tau cov lim dej tawv. Cov lim dej ua npuas ncauj Ceramic no thaiv cov slag, cov graphite fragments, thiab oxides uas ua rau lub zog puas tsuaj.​

Cov kev siv tseem ceeb ntawm no:

Kev Txhaj Tshuaj Hlau & Hlau Stainless:

Tiv taus cov hlau kub yaj kom tsim tau cov khoom siv txhim khu kev qha rau:

Cov tshuab siv hauv kev lag luam:Cov kav dej hlau, lub cev twj tso kua mis, lub thawv iav (tsis muaj qhov tawg sab hauv = lub sijhawm tsis ua haujlwm tsawg dua).​

Kev Tsim Kho:Cov hlau tsis xeb, cov khoom siv rebar (tiv taus xeb).

Cov khoom siv kho mob:Cov cuab yeej phais mob ua los ntawm cov hlau tsis xeb, cov dab dej hauv tsev kho mob (hlau ntshiab = siv tau zoo).

Casting hlau:

Txhim kho cov qauv me me rau:

Tsheb:Cov discs nres hlau grey, cov crankshafts hlau ductile (tswj tau kev sib txhuam thiab torque).

Cov khoom siv hnyav:Cov khoom siv tsheb laij teb ua los ntawm hlau cam khwb cia, lub puab tsaig crusher (yuav tsum tau hnav tsis kam).

Cov kav dej:Cov kav dej hlau xim av (tsis muaj qhov xau los ntawm cov khoom sib xyaw).

3. Kev Casting Kub Siab Tshwj Xeeb: Sib ntaus nrog Titanium, Refractory Alloys

Rau cov kev siv hnyav heev (aerospace, nuclear), qhov twg cov hlau kub heev (1800°C+) lossis reactive (titanium), cov lim dej txheem tsis ua haujlwm. Cov lim dej ua npuas ncauj Ceramic (tshwj xeeb yog ZrO₂) yog tib qho kev daws teeb meem.

Cov kev siv tseem ceeb ntawm no:

Kev siv titanium alloy:

Cov titanium yaj ua rau feem ntau cov ntaub ntawv - tab sis cov lim dej ZrO₂ tseem nyob twj ywm, ua rau:

Cov khoom siv hauv chaw dav hlau:Cov hniav titanium cav, cov iav tsaws dav hlau (xav tau hlau ntshiab heev rau qhov siab).

Cov khoom cog rau kev kho mob:Cov khoom siv hloov titanium ntawm lub duav, cov khoom siv kho hniav (tsis muaj kuab paug = sib haum nrog lub cev).​

Refractory alloy casting:

Cov lim dej uas tsis yog ferrous superalloys (raws li nickel, raws li cobalt) rau:​

Kev tsim hluav taws xob:Cov khoom siv roj turbine uas yog nickel-alloy (ua haujlwm tau qhov kub ntawm 1000°C+).

Kev lag luam nuclear:Cov roj zirconium alloy cladding (tiv taus hluav taws xob thiab kub siab).

Vim li cas cov lim dej ua los ntawm cov khoom siv ua npuas ncauj thiaj li yeej lwm cov kev xaiv?

Tsis zoo li cov ntxaij lim hlau lossis cov lim xuab zeb, CFFs:

Muaj cov qauv 3D uas muaj qhov porous (ntes tau ntau yam tsis huv, txawm tias yog cov me me).​

Tiv taus qhov kub siab heev (1200–2200°C, nyob ntawm cov khoom siv).

Ua haujlwm nrog txhua yam hlau loj (txhuas mus rau titanium).

Txo cov nqi pov tseg los ntawm 30–50% (txuag lub sijhawm thiab nyiaj txiag).

Tau txais CFF uas yog rau koj qhov kev siv

Txawm koj tab tom ua cov khoom siv hauv tsheb uas ua los ntawm txhuas, cov qhov dej uas ua los ntawm hlau tsis xeb, lossis cov khoom siv titanium, peb muaj cov lim dej ua los ntawm Ceramic Foam uas ua raws li koj xav tau. Peb cov lim dej ua tau raws li cov qauv ISO/ASTM, thiab peb pab neeg yuav pab koj xaiv cov khoom siv zoo (Al₂O₃ rau txhuas, SiC rau hlau, ZrO₂ rau titanium).​

Tiv tauj peb hnub no kom tau txais cov qauv dawb thiab tus nqi raws li koj xav tau. Tsum tsis txhob tawm tsam qhov tsis zoo ntawm kev casting - pib ua cov khoom zoo tshaj plaws nrog CFF!