Kodi kusintha makina zimatha kuponyedwa imvi chitsulo?
Gray cast iron ndi alloy iron-carbon alloy momwe gawolo limakhala lotuwa. Kupyolera mu ulamuliro wa zikuchokera ndi ndondomeko solidification, mpweya makamaka limapezeka mu mawonekedwe a flake graphite. Mapangidwe a metallographic a imvi kuponyedwa chitsulo makamaka amapangidwa ndi flake graphite, zitsulo masanjidwewo ndi tirigu malire eutectic.
Kukhalapo kwa flake graphite mu chitsulo chotuwirako kumawononga kupitiriza kwachitsulocho ndipo kumapangitsa kuti chitsulo chotuwa chikhale chophwanyika. Koma chitsulo chotuwira ndi chimodzi mwa zinthu zakale kwambiri komanso zomwe zimagwiritsidwa ntchito kwambiri.Grey cast iron castingsali ndi katundu wambiri. Kwa nthawi yayitali, muzochita zopanga, tafotokoza mwachidule njira zina zomwe zimathandizira kuti chitsulo chikhale cholimba. Pazifukwa zina, titha kusinthanso magwiridwe antchito, kukana kuvala komanso kuyamwa kwachitsulo chachitsulo chotuwira.
Pakupanga kwenikweni, chitsulo chambiri chotuwira ndi cha hypoeutectic. Chifukwa chake, kuti muwonjezere mphamvu zake zolimba, mfundo zotsatirazi ziyenera kuchitika momwe mungathere:
1) Tsimikizirani kuti chitsulo chotuwira chimakhala ndi ma austenite dendrites otukuka kwambiri panthawi yolimba
2) Chepetsani kuchuluka kwa eutectic graphite ndikupangitsa kuti igawidwe mofanana ndi graphite yamtundu wa A
3) Wonjezerani kuchuluka kwa magulu a eutectic
4) Pakusintha kwa austenite eutectoid, onse amasintha kukhala matrix abwino a pearlite
Popanga zenizeni zachitsulo chotupitsa, nthawi zambiri timagwiritsa ntchito njira zotsatirazi kuti tikwaniritse zotsatirazi:
1) Sankhani mankhwala oyenerera
2) Sinthani kapangidwe ka mtengowo
3) Kutenthedwa kwachitsulo chosungunuka
4) Chithandizo cha inoculation
5) Tsatirani kapena otsika alloying
6) Chithandizo cha kutentha
7) Wonjezerani kuzizira panthawi ya kusintha kwa eutectoid
Njira zenizeni zomwe ziyenera kutengedwa zimadalira mtundu wa zitsulo zotayira zotuwa, zomwe zimafunikira komanso momwe zimapangidwira. Komabe, nthawi zambiri zimakhala zofunikira kutenga njira ziwiri kapena zingapo kuti mukwaniritse zomwe mukufuna chitsulo choponyedwa.
Nthawi yotumiza: Dec-28-2020