Earthwork Angle Dej iav Investment Casting

Khoom Taw Qhia

Earthwork lub kaum sab xis dej iav peev casting tuaj yeem siv ntau yam kev siv nrog rau cov khoom siv hauv av, cov khoom siv excavator, cov cuab yeej trenching thiab mining machinery. Lawv kuj tau siv rau hauv cov khoom hauv lwm qhov kev lag luam, xws li aerospace, tsheb thiab khoom siv kho mob.

Stainless hlau casting txheej txheem
German tus qauv (EN) X2CrNi18-9 stainless hlau, siv tus qauv: DIN 17440-1979, belongs rau austenitic stainless hlau. Cov txheej txheem ntau lawm ntawm austenitic stainless hlau muaj kev ua tau zoo, tshwj xeeb tshaj yog chromium-nickel austenitic stainless hlau. Cov paib txhais tau tias tsim cov hlau tshwj xeeb tuaj yeem siv Smoothly tsim daim hlau, raj, strips, xov hlau, tuav, nrog rau forgings thiab castings ntawm ntau yam kev siv tshwj xeeb.
Austenitic stainless hlau kuj tseem siv tau los tsim cov castings. Txhawm rau txhim kho cov dej ntws ntawm cov hlau molten thiab txhim kho kev ua tau zoo, cov alloy muaj pes tsawg leeg ntawm cov cam khwb cia hlau yuav tsum tau hloov kho: ua kom cov ntsiab lus silicon, so qhov ntau ntawm chromium thiab npib tsib xee cov ntsiab lus, thiab ua kom lub siab txwv ntawm impurity element sulfur.
X2CrNi18-9 stainless hlau, German DIN txheem stainless hlau. Raws li rau 022Cr19Ni10, tus lej sib raug peb paub ntau dua yog 304L. Piv nrog rau 304 zoo tib yam, 304L muaj cov ntsiab lus qis dua thiab tsis muaj qhov sib txawv ntawm cov khoom siv tshuab. Feem ntau siv hauv vuam, vim tias cov ntsiab lus ntawm cov pa roj carbon tsawg, uas tuaj yeem ua rau muaj peev xwm tiv thaiv intergranular corrosion. (Cov ntsiab lus carbon ntawm 304 yog min. 0.15%, thiab ntawm 304L yog min. 0.030%. 304L yuav tsum softer).
Qauv: X2CrNi18-9
Txheem: DIN 17400
chemical muaj pes tsawg leeg:
C: Tsawg dua lossis sib npaug rau 0.03
Si: Tsawg dua lossis sib npaug rau 1.00
Mn: Tsawg dua lossis sib npaug rau 2.00
P: Tsawg dua lossis sib npaug rau 0.045
S: Tsawg dua lossis sib npaug rau 0.015
Cr: 17. {1}}~ 19.50
Mo: -
Nws: 8.{1}}~10.50
N: Tsawg dua lossis sib npaug rau 0.11
 

Kev nqis peev Casting
Txoj kev peev casting, yooj yim tso, yog siv cov ntaub ntawv fusible (xws li siv quav ciab lossis yas) los ua tus qauv fusible (hu ua peev pwm lossis qauv), coated nrog ob peb txheej txheej tshwj xeeb refractory txheej, tom qab ziab thiab hardening rau daim ntawv. ib lub plhaub, thiab tom qab ntawd siv chav los yog dej kub kom yaj cov qauv ntawm lub plhaub, thiab tom qab ntawd muab lub plhaub rau hauv lub thawv xuab zeb, sau nrog cov xuab zeb qhuav nyob ib ncig ntawm nws, thiab thaum kawg muab cov pwm tso rau hauv qhov cub kom kub kub. roasting (xws li kev siv lub plhaub muaj zog, lub plhaub demolded tuaj yeem ncaj qha roasted yam tsis muaj qauv), thiab lub plhaub los yog lub plhaub yog ci, thiab cov hlau molten yog nchuav rau hauv nws kom tau txais cov casting.
Qhov tseeb qhov tseeb ntawm peev castings yog siab, feem ntau mus txog CT4-6 (CT10 ~ 13 rau xuab zeb casting, CT5 ~ 7 rau tuag-casting), tau kawg, vim cov txheej txheem nyuaj ntawm peev casting, muaj ntau ntau. yam cuam tshuam rau qhov tseeb qhov tseeb ntawm castings, xws li shrinkage ntawm pwm, deformation ntawm peev pwm, hloov linear ntawm lub plhaub nyob rau hauv cov cua kub thiab txias txheej txheem, shrinkage tus nqi ntawm cov alloy thiab deformation ntawm casting nyob rau hauv lub Cov txheej txheem solidification, thiab lwm yam, yog li txawm hais tias qhov tseeb qhov tseeb ntawm cov peev txheej castings yog siab dua, nws qhov kev sib xws tseem yuav tsum tau txhim kho (kev siv nruab nrab, qhov sib xws ntawm qhov sib xws ntawm cov khoom siv hluav taws xob kub kub yog qhov zoo dua).
Thaum nias lub peev pwm, nias qhov profile nrog cov kab noj hniav siab kawg yog siv, yog li qhov ua tiav ntawm cov peev pwm kuj tseem siab. Tsis tas li ntawd, lub plhaub yog tsim los ntawm kev siv cov txheej txheej refractory ua los ntawm cov khoom tshwj xeeb thiab cov khoom siv refractory uas tiv taus qhov kub thiab txias thiab siv rau cov pwm peev, thiab sab hauv ntawm cov kab noj hniav hauv kev sib cuag nrog cov hlau molten muaj siab. ua kom tiav. Yog li ntawd, qhov nto tiav ntawm peev castings yog siab dua li ntawm cov castings, uas feem ntau tuaj yeem ncav cuag Ra.1.6 ~ 3.2μm.
 

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