Cov Khoom, Cov Zoo thiab Cov Kev Siv ntawm Cov Hlau Ductile

Hlau zas, tseem hu ua hlau spheroidal lossis nodular, yog ib pawg ntawm cov hlau sib xyaw nrog cov qauv microstructure tshwj xeeb uas muab rau lawv lub zog siab, kev ywj pheej, kev ruaj khov, thiab elasticity. Nws muaj ntau tshaj 3 feem pua ​​​​​​carbon thiab tuaj yeem khoov, ntswj, lossis deformed yam tsis tawg, ua tsaug rau nws cov qauv graphite flake. Hlau zas zoo ib yam li hlau hauv nws cov khoom siv kho tshuab thiab muaj zog dua li cov hlau cam khwb cia txheem.

Cov hlau ductile castings yog tsim los ntawm kev nchuav cov hlau ductile uas yaj rau hauv cov pwm, qhov twg cov hlau txias thiab khov kho kom ua tau cov duab xav tau. Cov txheej txheem casting no ua rau cov khoom hlau khov kho nrog kev ruaj khov zoo heev.

Dab tsi ua rau Ductile Iron Tshwj Xeeb?

Cov hlau ductile tau tsim tawm xyoo 1943 ua ib qho kev txhim kho niaj hnub no dua li cov hlau cam khwb cia ib txwm muaj. Tsis zoo li cov hlau cam khwb cia, qhov twg graphite zoo li flakes, cov hlau ductile muaj graphite nyob rau hauv daim ntawv ntawm spheroids, yog li ntawd lo lus "spheroidal graphite." Cov qauv no tso cai rau cov hlau ductile kom tiv taus kev khoov thiab kev poob siab yam tsis muaj kev tawg, muab kev ruaj khov ntau dua li cov hlau cam khwb cia ib txwm muaj, uas yooj yim brittleness thiab tawg.

Cov hlau ductile feem ntau yog ua los ntawm cov hlau npua, uas yog cov hlau ntshiab heev uas muaj ntau tshaj 90% hlau. Cov hlau npua yog cov khoom siv uas neeg nyiam vim nws muaj cov khoom seem tsawg lossis cov khoom phom sij, cov tshuaj lom neeg sib xws, thiab txhawb kom muaj cov slag zoo tshaj plaws thaum lub sijhawm tsim khoom. Cov khoom siv no yog ib qho laj thawj tseem ceeb uas ua rau cov chaw ua hlau ductile nyiam cov hlau npua dua li lwm cov khoom siv xws li cov hlau seem.

Cov Khoom ntawm Cov Hlau Ductile

Cov hlau ductile sib txawv yog tsim los ntawm kev tswj cov qauv matrix nyob ib puag ncig graphite thaum lub sijhawm casting lossis los ntawm kev kho cua sov ntxiv. Cov kev hloov pauv me me no yog tsim los ua kom tiav cov qauv me me, uas ua rau txiav txim siab cov yam ntxwv ntawm txhua qib ntawm hlau ductile.

Cov hlau ductile tuaj yeem xav txog tias yog hlau nrog cov graphite spheroids uas tau muab tso rau hauv. Cov yam ntxwv ntawm cov hlau matrix uas nyob ib puag ncig cov graphite spheroids cuam tshuam rau cov khoom ntawm cov hlau ductile, thaum cov graphite nws tus kheej pab txhawb rau nws qhov elasticity thiab kev ywj pheej.

Muaj ntau hom matrices hauv cov hlau ductile, nrog rau cov hauv qab no yog cov feem ntau:

1. 1. Ferrite- Ib qho hlau matrix ntshiab uas muaj zog thiab yoog tau yooj yim, tab sis muaj zog tsawg. Ferrite tsis zoo hnav tsis kam, tab sis nws qhov kev cuam tshuam siab thiab yooj yim ntawm kev siv ua rau nws yog ib qho khoom muaj nqis hauv cov hlau ductile.
2. 2. Pearlite– Ib qho sib xyaw ua ke ntawm ferrite thiab hlau carbide (Fe3C). Nws yog qhov nyuaj nrog qhov nruab nrab ductility, muab lub zog siab, zoo hnav tsis kam, thiab nruab nrab impact tsis kam. Pearlite kuj muab kev siv tshuab zoo.
3. 3. Pearlite/Ferrite- Ib qho qauv sib xyaw nrog ob qho tib si pearlite thiab ferrite, uas yog lub matrix feem ntau hauv cov qib lag luam ntawm cov hlau ductile. Nws muab cov yam ntxwv ntawm ob qho tib si, muab kev sib npaug rau lub zog, ductility, thiab machinability.

Lub microstructure tshwj xeeb ntawm txhua lub hlau hloov nws cov khoom siv lub cev:

Cov Qib Hlau Ductile Feem Ntau

Txawm hais tias muaj ntau yam kev qhia txog hlau ductile sib txawv, cov chaw tsim khoom feem ntau muab 3 qib sib xws:

Cov txiaj ntsig ntawm cov hlau ductile

Cov hlau ductile muaj ntau yam txiaj ntsig rau cov neeg tsim qauv thiab cov chaw tsim khoom:

• • Nws tuaj yeem yooj yim raug pov thiab tshuab, txo cov nqi tsim khoom.
• • Nws muaj qhov sib piv ntawm lub zog thiab qhov hnyav, ua rau cov khoom siv ruaj khov tab sis tsis hnyav.
• • Hlau ductile muab qhov sib npaug zoo ntawm kev tawv, kev siv nyiaj tsawg, thiab kev ntseeg tau.
• • Nws qhov kev ua tau zoo tshaj plaws thiab kev siv tshuab ua rau nws tsim nyog rau cov khoom nyuaj.

Cov ntawv thov ntawm cov hlau Ductile

Vim nws lub zog thiab kev ywj pheej, cov hlau ductile muaj ntau yam kev siv hauv kev lag luam. Nws feem ntau siv rau hauv cov kav dej, cov khoom siv hauv tsheb, cov iav, cov twj tso kua mis, thiab cov hauv paus tshuab. Cov hlau ductile tiv taus kev tawg ua rau nws zoo tagnrho rau kev siv kev nyab xeeb, xws li bollards thiab kev tiv thaiv kev cuam tshuam. Nws kuj tseem siv dav hauv kev lag luam cua thiab lwm qhov chaw muaj kev ntxhov siab uas qhov ruaj khov thiab kev ywj pheej yog qhov tseem ceeb.