Grey Cast Iron VS Ductile Cast Iron

Zvose grey iron uye ductile iron inogona kukandwa nayojecha kukanda nzira, shell molding casting process (resin yakavharwa jecha), yakarasika foam casting, vacuum casting uye investment casting. Kukanda jecha ndeimwe yemhando dzakakurumbira uye dzakareruka dzekukanda. Kukandwa kwejecha kunobvumira mabheji madiki pane kukanda kwechigarire mold uye nemutengo unonzwisisika. Haisi nzira iyi chete inobvumira vagadziri kugadzira zvigadzirwa nemutengo wakaderera, asi kune zvimwe zvakanakira kukanda jecha, senge diki-saizi mashandiro. Kukandwa kwejecha kunobvumirawo simbi zhinji kuti dziraswe, zvichienderana nerudzi rwejecha rinoshandiswa pakuumba. Shell molding casting process inonziwo pre-coated resin jecha kukanda process, inopisa goko rekuumba castings kana core casting process. Chinhu chikuru chekuumba ndeye pre-yakavharidzirwa phenolic resin jecha, iyo inodhura kupfuura jecha rakasvibirira uye furan resin jecha. Uyezve, jecha iri harigone kushandiswazve. Magoko ekukandira simbi ane mutengo wakakwira pane kukanda jecha. Zvisinei, theshell molding kukanda zvikamuvane mabhenefiti akawanda akadai seyakasimba dimensional kushivirira, kunaka kwepamusoro uye kushomeka kwekukanda.

Nekudaro, kuchine mimwe misiyano pakati pegrey iron casting parts uye ductile iron casting parts.Grey Iron Sand Kukandainonyanya kushandiswa kugadzira maumbirwo akaomarara ayo angave akaoma kana kuti asina hupfumi kugadzira nemamwe maitiro ekugadzira simbi. Nekuda kwekureruka kwayo kwekugadzira, yakakwirira yekumanikidza simba, zvirinani kupisa kwemafuta uye yakanakisa vibration kunyudza, iyo grey cast iron ndiyo inonyanya kushandiswa kukanda simbi kwenguva yakareba kwazvo, kunyangwe mukugadzirwa kweindasitiri kwazvino. Kabhoni yemukati ndiyo inonyanya kukosha chinhu chegrey iron (kazhinji 2% kusvika 4%) kugadzira simba rekusimba uye machinability. Kana simbi yakanyungudutswa ikaomesa mamwe ecarbon precipitates se graphite, ichiita tudiki, asina kujairika flakes mukati mekristaro chimiro chesimbi inosimudzira inodiwa zvimiro zvesimbi yakakandwa, maflakes anokanganisa chimiro chekristaro chinotungamira mukukanda hunhu hwesimbi.

Kuvandudzwa kwegrey cast iron kunonyanya kufambiswa nesimba repamusoro. Munguva yakapfuura, nzira huru yekuvandudza kushanda kwegrey cast iron yaiva inoculation. Mumakore achangopfuura, nzira huru iko zvino ndeyekutarisa pane alloying, uye kuitira kuvandudza mashandiro ekukanda, akawanda egrey iron foundries anoshandisa simbi yakakandwa ine yakakwira kabhoni yakaenzana. Izvi zvinonyanya kukosha kune yakaderera alloy cast iron. Naizvozvo, iyo grey cast iron ndiyo yakakodzera zvinhu kugadzira simbi yekukanda zvikamu zveinjini block, muchina imba, muchina base, counterweights, zvitofu zvikamu, boilers, pombi magomba uye zvichingodaro.

Ductile iron inopa dhizaini kuchinjika uye kuderedzwa kwemitengo yekugadzira maringe neyakagadzirwa machira uye mafogi. Mune iyo microstructure ye ductile iron, iyo graphite inoumba kuita spherical nodules pachinzvimbo cheflakes, nekudaro ichivharira kusikwa kwekutsemuka uye kupa iyo inosimudzira ductility inopa alloy zita rayo. Ductile iron ine yakakwira tensile simba uye kuoma kwakafanana nesimbi.Ductile iron castingsvane maitiro akawanda, zvisinei, haasi nguva dzose inodhura-inoshanda imwe nzira kune mamwe ferrous alloys. Pamusoro pezvo, ma ductile irons anoshandiswa zvakanyanya mumaindasitiri mazhinji ekugadzira, anosanganisira zvekurima, mota, hydraulics, zvitima zvenjanji, marori ekutengesa uye maindasitiri emuchadenga.