Qhov Tseem Ceeb Qhov txawv - Grey Cast Iron vs Dawb Cam khwb cia hlau
Qhov sib txawv ntawm grey cam khwb cia hlau thiab dawb cam khwb cia hlau tshwm sim los ntawm cov muaj pes tsawg leeg thiab cov xim ntawm cov khoom nto tom qab fracturing. Ob leeg ntawm cov hlau casting alloys mas muaj carbon thiab silicon, tab sis nyob rau hauv sib txawv proportions. Ib qho tseem ceeb sib txawv ntawm grey cam khwb cia hlau thiab dawb cam khwb cia hlau yog hais tias tom qab fracturing, dawb cam khwb cia hlau muab ib tug dawb dawb lias tawg nto thiab grey cam khwb cia hlau ua ib tug grey xim fractured nto. Qhov no yog qhov yooj yim vim lawv cov khoom siv hauv cov hlau.
Grey Cast Iron yog dab tsi?
Cov khoom siv feem ntau ntawm casting alloy yog grey cam khwb cia hlau. Cov muaj pes tsawg leeg muaj li ntawm 2.5% mus rau 4% carbon thiab 1% mus rau 3% silicon. Nyob rau hauv tus txheej txheem ntawm kev ua grey cam khwb cia hlau, kev tswj kom zoo ntawm cov pa roj carbon thiab silicon cov ntsiab lus thiab tswj kom zoo cua txias tus nqi tiv thaiv tsim ntawm hlau carbide thaum lub sij hawm solidification. Qhov no yuav pab kom precipitate graphite ncaj qha los ntawm yaj raws li niaj zaus, feem ntau elongated thiab nkhaus flakes nyob rau hauv ib tug hlau matrix saturated nrog carbon. Thaum nws tawg, txoj kev tawg khiav los ntawm flakes thiab cov pob txha tawg tshwm nyob rau hauv grey vim graphite tam sim no nyob rau hauv cov khoom.
Dab tsi yog Hlau Cast?
Dawb cam khwb cia hlau tau txais nws lub npe los ntawm cov dawb, crystalline tawg nto uas nws imparts tom qab fracturing. Feem ntau, cov ntaub ntawv hlau cam khwb cia dawb feem ntau muaj tsawg dua 4.3% ntawm carbon thiab tsawg npaum li cas ntawm silicon. Qhov no inhibits nag lossis daus ntawm carbon nyob rau hauv daim ntawv ntawm graphite. Dawb cam khwb cia hlau yog feem ntau siv nyob rau hauv daim ntaub ntawv, qhov twg abrasion kuj yog ib qho tseem ceeb thiab ductility tsis heev ho xav tau. Piv txwv yog liner rau cement mixers, nyob rau hauv ib co kos duab tuag, pob zeb thiab extrusion nozzles. Dawb cam khwb cia hlau tsis tuaj yeem welded vim hais tias nws yog ib qho nyuaj heev kom haum welding-induced kev nyuaj siab nyob rau hauv tsis muaj tej yam ductile zog nyob rau hauv lub hauv paus hlau. Tsis tas li ntawd, lub tshav kub cuam tshuam cheeb tsam nyob ib sab ntawm lub vuam yuav tawg thaum lub caij txias tom qab vuam.
Qhov txawv ntawm Grey Cast Iron thiab Dawb Cam khwb cia hlau yog dab tsi?
Composition:
Grey Cam khwb cia hlau: Feem ntau, muaj pes tsawg leeg ntawm grey cam khwb cia hlau yog; li ntawm 2.5% mus rau 4.0% carbon, 1% mus rau 3% ntawm silicon thiab cov seem tshuav siv hlau.
White Cam khwb cia hlau: Feem ntau, dawb cam khwb cia hlau feem ntau muaj carbon thiab silicon; li 1.7% mus rau 4.5% carbon thiab 0.5% mus rau 3% ntawm silicon. Tsis tas li ntawd, nws tuaj yeem muaj cov kab mob sulfur, manganese, thiab phosphorus.
Properties:
Grey Cam khwb cia hlau: Grey cam khwb cia hlau muaj lub zog ntau dua thiab ua haujlwm siab rau deformation. Nws cov ntsiab lus melting kuj tsawg, 1140 ºC txog 1200 ºC. Nws kuj muaj kev tiv thaiv ntau dua rau oxidation; Yog li ntawd, nws rusts qeeb heev thiab qhov no muab kev daws teeb meem mus tas li rau qhov teeb meem ntawm corrosion.
White Cam khwb cia hlau: Nyob rau hauv cov hlau cam khwb cia hlau carbon yog tam sim no nyob rau hauv daim ntawv ntawm carbide ntawm hlau. Nws yog ib qho nyuaj thiab nkig, muaj lub zog tensile ntau dua thiab tsis tshua muaj peev xwm ua tau zoo (muaj peev xwm rau rauj lossis nias mus tas li ntawm cov duab yam tsis muaj kev tawg lossis tawg). Nws kuj muaj siab compressive zog thiab zoo heev hnav tsis kam. Nws tuaj yeem tswj hwm nws qhov nyuaj rau lub sijhawm txwv, txawm tias mus txog qhov kub kub. Nws tsis tuaj yeem yooj yim nrum li lwm yam hlau vim nws muaj qhov kub thiab txias.
Siv:
Grey Cam khwb cia hlau: Cov chaw siv feem ntau ntawm cov hlau cam yog grey; nyob rau hauv combustion engine cylinders, twj tso kua mis vaj tse, hluav taws xob thawv, valve lub cev thiab hniav castings. Nws kuj tseem siv tau rau hauv cov khoom siv ua noj thiab nres rotors.
White Cam khwb cia hlau: Dawb cam khwb cia hlau yog feem ntau siv hauv crushing, sib tsoo, milling thiab tuav cov ntaub ntawv abrasive.
