Iyini imiphumela yokujova ngokweqile kwe-iron castings

1. Imiphumela yokujova ngokweqile kwensimbi

1.1 Uma ukujova kudlulele, okuqukethwe kwe-silicon kuzoba phezulu, futhi uma kudlula inani elithile, kuzovela i-silicon brittleness. Uma okuqukethwe kwe-silicon kokugcina kweqa izinga, kuzophinde kuholele ekushubeni kwe-graphite yohlobo lwe-A; kubuye kuthambekele ekunciphiseni nasekunciphiseni, futhi inani le-matrix F lizokhula; futhi kuzoba ne-pearlite encane. Uma kune-ferrite eningi, amandla azokwehla esikhundleni salokho.

1.2 I-inoculation eyeqile, kodwa okuqukethwe kwe-silicon yokugcina akudluli izinga, kulula ukukhiqiza imigodi ye-shrinkage kanye ne-shrinkage, isakhiwo siyacwengwa, futhi amandla ayathuthukiswa.

1.3 Uma inani le-inoculation likhulu kakhulu, imvula ye-graphite izokwehla ngesikhathi senqubo yokuqinisa, ukunwetshwa kwe-cast iron kuzokwehla, ukwanda kwamaqembu e-eutectic kuzodala ukungondleki kahle, futhi ukuncipha koketshezi kuzoba kukhudlwana, okuholela ekuncipheni. i-porosity.

1.4 Ukujova ngokweqile kwe-iron nodular kuzokwandisa inani lamaqoqo e-eutectic futhi kwandise ukuthambekela kokuxega, ngakho-ke kukhona inani elifanelekile lokujova. Kuyadingeka ukubona ukuthi inani lamaqoqo e-eutectic lincane kakhulu noma likhulu kakhulu ngaphansi kwe-metallography, okungukuthi, ngaphansi kwengcindezi Kungani unake inani le-inoculum, futhi isizathu sokuthi i-inoculum ye-hypereutectic ductile iron inkulu kakhulu izodala igraphite ukuntanta.

2. Indlela yokufaka yokufaka insimbi

2.1 Ukuncipha kwe-iron Ductile ngokuvamile kubangelwa ijubane elipholile lokupholisa kanye nesikhathi eside sokuqina, okuholela ekuhlanekezelekeni kwe-graphite phakathi nendawo yokuphonsa, inani elincishisiwe lamabhola, namabhola amakhulu e-graphite. Inani le-magnesium eyinsalela, lilawula inani lensalela yomhlaba engavamile, engeza izakhi zokulandelela, ukuqinisa ukujova nezinye izinyathelo zobuchwepheshe.

2.2 Uma ujova nge-iron ductile, okuqukethwe kwe-silicon yensimbi yokuqala encibilikisiwe kuphansi, okuhlinzeka ngezimo zokwandisa i-inoculation. Inani lokujova elengezwe abantu abahlukene lingase lihluke. Kulungile, kodwa futhi akwanele.

3. Inani le-inoculant elengezwe ekubunjweni kwensimbi

3.1 Indima ye-inoculant: khuthaza i-graphitization, uthuthukise ukusabalalisa komumo nobukhulu be-graphite, unciphise ukuthambekela kokwenza mhlophe, futhi ukwandise amandla.

3.2 Inani le-inoculant elingeziwe: 0.3% esikhwameni, 0.1% ekubunjweni, 0.4% isiyonke.