1. Zotsatira za katemera wochuluka wa chitsulo
1.1 Ngati katemera ndi wochuluka kwambiri, silicon idzakhala yochuluka, ndipo ngati iposa mtengo wina, brittleness ya silicon idzawonekera. Ngati silicon yomaliza ikadutsa muyeso, imayambitsanso kukulitsa kwa graphite yamtundu wa A; imakhalanso yowonongeka ndi kuchepa, ndipo kuchuluka kwa matrix F kudzawonjezeka; padzakhalanso ngale zochepa. Ngati pali ferrite yambiri, mphamvu idzachepa m'malo mwake.
1.2 Kuthira mopitirira muyeso, koma zomaliza za silicon sizidutsa muyeso, zosavuta kutulutsa zibowo za shrinkage ndi shrinkage, kapangidwe kake kakuyengedwa, ndipo mphamvuyo imakhala bwino.
1.3 Ngati kuchuluka kwa inoculation kuli kwakukulu kwambiri, mpweya wa graphite udzachepa panthawi yolimba, kuwonjezeka kwa chitsulo kudzachepa, kuwonjezeka kwa magulu a eutectic kumayambitsa kudyetsa kosauka, ndipo kuchepa kwamadzimadzi kudzakhala kwakukulu, zomwe zimabweretsa kuchepa. porosity.
1.4 Kuchuluka kwa chitsulo cha nodular chitsulo kudzawonjezera chiwerengero cha magulu a eutectic ndikuwonjezera chizolowezi chomasula, kotero kuti pakhale kuchuluka kwa inoculation. Ndikofunikira kuwona ngati kuchuluka kwa masango a eutectic ndi ochepa kwambiri kapena akulu kwambiri pansi pa metallography, ndiye kuti, mopanikizika Chifukwa chiyani samalani ndi kuchuluka kwa inoculum, komanso chifukwa chake inoculum ya chitsulo cha hypereutectic ductile iron ndi yayikulu kwambiri imayambitsa graphite. kuyandama.
2. Inoculation limagwirira wa chitsulo castings
2.1 Ductile iron shrinkage nthawi zambiri imayamba chifukwa cha kuzizira pang'onopang'ono komanso nthawi yayitali yolimba, yomwe imatsogolera kupotoza kwa graphite pakati pa kuponyera, kuchepa kwa mipira, ndi mipira yayikulu ya graphite. Kuchuluka kwa magnesium yotsalira, kuwongolera kuchuluka kwa zotsalira zapadziko lapansi, kuwonjezera kufufuza zinthu, kulimbikitsa inoculation ndi njira zina zaukadaulo.
2.2 Mukalowetsa mu chitsulo cha ductile, silicon yomwe ili muchitsulo chosungunula choyambirira imakhala yochepa, yomwe imakupatsirani mikhalidwe yowonjezereka. Kuchuluka kwa inoculation anawonjezera anthu osiyanasiyana kungakhale kosiyana. Chabwino, komanso osakwanira.
3. Kuchuluka kwa inoculant anawonjezera ku castings chitsulo
3.1 Udindo wa inoculant: kulimbikitsa graphitization, kupititsa patsogolo kugawa mawonekedwe ndi kukula kwa graphite, kuchepetsa chizolowezi choyera, ndikuwonjezera mphamvu.
3.2 Kuchuluka kwa inoculant anawonjezera: 0,3% mu thumba, 0.1% mu nkhungu, 0.4% onse.
Nthawi yotumiza: May-05-2023
