Kev cai Malleable Cast Iron Plhaub Casting Khoom

Lub malleable cam khwb cia hlau castings feem ntau yog nrum los ntawmntsuab xuab zeb castinglos yog cob coated xuab zebplhaub moldingcov txheej txheem ntawm RMC casting foundry.

Cam khwb cia hlau yog cov ferrous alloys uas muaj cov ntsiab lus carbon ntau tshaj 2%. Txawm hais tias cam khwb cia hlau tuaj yeem muaj qhov feem pua ​​​​ntawm cov pa roj carbon monoxide ntawm 2 txog 6.67, qhov kev txwv tsis pub muaj feem ntau ntawm 2 thiab 4%. Cov no yog cov tseem ceeb vim lawv zoo heev casting zoo. Grey cam khwb cia hlau, cam khwb cia hlau (tseem hu ua nodular cam khwb cia hlau los yog spheroidal graphite hlau) thiab malleable cam khwb cia hlau yog peb lub ntsiab cam khwb cia hlau nyob rau hauv foundry.

Lub malleable cam khwb cia hlau muaj dawb carbon uas muaj nyob rau hauv daim ntawv ntawm nodules nyob rau hauv lub matrix ntawm cementite thiab ferrite. Qhov no yog ua tiav los ntawm thawj chilling lub casting kom tag nrho cov dawb cam khwb cia hlau yog tsim, ua raws li los ntawm ib tug tswj kev kho cua sov txheej txheem kom ib co ntawm cov cementite hloov mus rau ferrite thiab nodules ntawm dawb carbon. Cov khoom no yog ductile ntau dua grey cam khwb cia hlau. Qhov nodaim ntawv no tsuas yog tsim rau cov khoom uas muaj me me seem thicknesses vim tag nrho cov hlau cam khwb cia hlau yog tsim los pib qhov chaw rau malleable hlau.

Plhaub pwm casting yog txheej txheem uas cov xuab zeb sib xyaw nrog cov thermosetting resin raug tso cai tuaj rau hauv kev sib cuag nrog cov qauv hlau uas muaj cua sov, kom lub plhaub nyias thiab muaj zog ntawm pwm yog tsim nyob ib ncig ntawm lub pattem. Tom qab ntawd lub plhaub tau muab tshem tawm ntawm tus qauv thiab cov kev tiv thaiv thiab rub raug tshem tawm ua ke thiab khaws cia rau hauv lub khob nrog cov khoom tsim nyog rov qab thiab cov hlau molten yog nchuav rau hauv pwm.

Feem ntau, qhuav thiab nplua xuab zeb (90 mus rau 140 GFN) uas tsis muaj av nplaum yog siv los npaj lub plhaub molding xuab zeb. Lub grain loj yuav tsum tau xaiv nyob ntawm qhov chaw tiav xav tau ntawm lub casting. Zoo heev ib tug grain loj yuav tsum tau loj npaum li cas ntawm resin, uas ua rau cov pwm kim.

Qhov zoo ntawm Resin Coated Sand Plhaub Pwm Casting:
1. Plhaub-pwm castings feem ntau yog qhov tseeb dua li cov xuab zeb castings. Nws yog ua tau kom tau txais kev kam rau siab ntawm +0.25 hli rau steel castings thiab +0. 35 hli rau grey cam khwb cia hlau castings nyob rau hauv ib txwm ua hauj lwm tej yam kev mob. Nyob rau hauv cov ntaub ntawv ntawm ze rau lub plhaub pwm, ib tug yuav tau txais nws nyob rau hauv ntau ntawm +0.03 mus rau +0.13 hli rau tej daim ntawv thov.
2. Ib tug smoother nto yuav tau nyob rau hauv lub plhaub castings. Qhov no yog feem ntau ua tiav los ntawm cov finer loj grain siv. Qhov ntau yam ntawm roughness yog ntawm qhov kev txiav txim ntawm 3 mus rau 6 mircrons.
3. Draft cov ces kaum, uas yog qis dua cov xuab zeb castings, yuav tsum tau nyob rau hauv lub plhaub pwm. Qhov kev txo qis hauv cov kaum sab xis tuaj yeem yog los ntawm 50 mus rau 75%, uas txo cov nqi ntawm cov khoom siv thiab cov nqi ua haujlwm tom ntej.
4. Qee zaum, cov cores tshwj xeeb yuav raug tshem tawm hauv plhaub molding. Txij li cov xuab zeb muaj lub zog siab, pwm tuaj yeem tsim tau raws li cov kab noj hniav sab hauv tuaj yeem tsim ncaj qha nrog qhov xav tau ntawm lub plhaub cores.
5. Tsis tas li ntawd, cov ntu nyias nyias (txog li 0.25 hli) ntawm hom cua txias lub tog raj kheej taub hau tuaj yeem ua tau yooj yim los ntawm lub plhaub molding vim lub zog ntau dua ntawm cov xuab zeb siv rau molding.
6. Permeability ntawm lub plhaub yog siab heev thiab yog li ntawd tsis muaj roj inclusions tshwm sim.
7. Cov xuab zeb me me heev yuav tsum tau siv.
8. Mechanization tau yooj yim ua tau vim yog kev ua haujlwm yooj yim koom nrog hauv plhaub molding.