Cov yeeb nkab hlau yog tsim los ntawm cov txheej txheem casting hu ua centrifugal casting. Kev kos duab ntawm centrifugal casting ntawm hollow hlau cov khoom yog qub heev thiab tau siv nyob rau hauv kev lag luam nplai txij thaum pib ntawm lub xyoo pua puv 19. Qhov ntxov tshaj plaws lus Askiv patent (Eckert) hnub tim rov qab mus rau 1809. Qhov ntxov tshaj plaws American patent tau muab nyob rau hauv 1848. Nyob rau tib lub sij hawm Andrew Shanks, nyob rau hauv London, England, pib ua cam khwb cia hlau yeeb nkab 12 ko taw (3.66 meters) ntev. thiab 3 nti (76 millimeters) nyob rau hauv txoj kab uas hla los ntawm pouring molten hlau mus rau hauv ib tug spinning wrought-hlau pwm. Nws cov txheej txheem tau piav qhia hauv Asmeskas hauv Kev Tshawb Fawb Asmeskas ntawm Lub Kaum Ob Hlis 1, 1849, thiab nws yog qhov txaus siab kom nco ntsoov tias hauv nws cov yam ntxwv tseem ceeb ntawm kev tsim lub tshuab Shanks tsis txawv ntawm txhua txoj hauv kev los ntawm cov tshuab feem ntau ua haujlwm nrog pwm txias. nyob rau hnub no.
Cov txheej txheem centrifugal casting siv nyob rau hauv kev tsim cov ductile hlau yeeb nkab tau nyob rau hauv tus txheej txheem ntawm kev lag luam kev loj hlob thiab refinement txij li thaum 1925. Nyob rau hauv lub centrifugal casting txheej txheem, ib tug tswj tus nqi ntawm molten hlau uas muaj cov yam ntxwv zoo yog nkag mus rau hauv ib tug rotating hlau los yog xuab zeb- lined pwm, haum nrog lub qhov (socket) core, xws li xa cov hlau hla sab hauv ntawm pwm nto los ntawm lub zog centrifugal. Lub zog no tuav cov hlau nyob rau hauv qhov chaw kom txog thaum solidification tshwm sim. Cov yeeb nkab raug tshem tawm los ntawm cov pwm yog qhov cub annealed los tsim cov khoom siv lub cev thiab cov khoom siv kho tshuab thiab tshem tawm cov kev ntxhov siab casting uas yuav muaj tam sim no. Tom qab ntxuav, kuaj hydrostatic, ntsuas qhov ntev, qhov hnyav, txheej, hauv ob sab phlu thiab cim, cov yeeb nkab yog npaj rau kev xa khoom. Daim duab 2 qhia txog cov ntawv ntws ntawm cov txheej txheem tsim khoom rau cov yeeb nkab hlau.
Cov kav dej hlau yog tsim los ntawm cov hlau tsis huv uas ua rau hauv lub qhov cub tawg los ntawm cov hlau ore lossis los ntawm cov hlau uas tsim los ntawm kev rov ua dua ntawm cov hlau thiab steel seem hauv lub qhov cub tawg uas tuaj yeem ua lub khob los yog lub cub hluav taws xob. Cov hlau ua kua yog desulphurized thiab nws cov muaj pes tsawg leeg thiab qhov kub thiab txias yog hloov mus rau cov qib meej hauv lub qhov cub hluav taws xob tsis muaj hluav taws xob ua ntej nws kho nrog magnesium. Magnesium ntxiv yog ua tiav nyob rau hauv kev tswj xyuas zoo vim nws yog cov kauj ruam tseem ceeb tshaj plaws hauv kev tsim cov kav hlau kav hlau. Lub magnesium kho hlau yog nkag mus rau hauv kab rov tav rotating pwm nrog kom muaj nuj nqis ntawm cov hlau poured tswj cov yeeb nkab thickness. Lub zog centrifugal tsim los ntawm kev sib hloov tuav cov hlau tiv thaiv phab ntsa pwm thiab quab yuam sib zog, tsis yog xim hlau impurities rau sab hauv cov yeeb nkab kom tshem tawm hauv cov txheej txheem ntxuav. Tom qab cov hlau tau solidified, lub tshuab casting yog nres thiab cov yeeb nkab yog stripped los ntawm pwm. Cov yeeb nkab yog ces annealed nrog precisely tswj lub sij hawm thiab kub cycles los tsim optimum lub cev zog. Tom qab annealing, cov yeeb nkab raug coj mus rau qhov chaw ua haujlwm qhov chaw uas nws tau ntxuav, machined, hydro-statistically kuaj, lined, thiab coated thiab ces zaum kawg tshuaj xyuas ua ntej xa.