ISO 2531 Ductile Casting Iron Pipe Class K9

Cov txheej txheem ntawm ISO2531 ductile casting hlau yeeb nkab chav kawm k9 feem ntau yog dej -cooled centrifugal casting siv hlau pwm, nrog cov txheej txheem compact thiab nruj parameter tswj. Ua ntej, blast furnace molten hlau yog tempered nyob rau hauv ib tug induction rauv los kho cov pa roj carbon thiab silicon muaj pes tsawg leeg thiab desulfurize, txhim kho purity. Tom qab ntawd, magnesium-raws li tus neeg sawv cev spheroidizing ntxiv yog siv lub ncuav los yog xaim- txoj kev pub mis, nrog rau cov inoculant, kom cov graphite spheroidized thiab tiv thaiv spheroidization lwj. Tom ntej no, tsim nyog molten hlau yog poured rau hauv ib tug preheated, tso tawm -coated, siab - ceev rotating pwm. Lub zog centrifugal tso cai rau cov hlau molten kom sib npaug sib npaug thiab nrawm nrawm rau hauv cov yeeb nkab ntom ntom. Tom qab demolding, nws raug xa mus rau lub qhov cub annealing thiab tuav ntawm 900{16}}950℃kom decompose cov cementite thiab tsim cov tawv ferritic matrix. Tom qab ntawd, zinc yog txau rau ntawm phab ntsa sab nrauv los txhim kho corrosion, thiab lub qhov (socket) thiab phab ntsa sab hauv yog av thiab sib npaug. Txhua cov yeeb nkab tau dhau qhov kev sim hydrostatic raws li tau teev tseg hauv ISO2531. Tom qab dhau qhov kev sim, cov cement hauv ob sab phlu thiab cov txheej tiv thaiv corrosion yog siv rau sab nrauv phab ntsa. Thaum kawg, tom qab qhov tsos thiab qhov ntsuas qhov ntev, cov yeeb nkab tau muab tso rau hauv qhov chaw cia.