Zithini iziphumo ze-inoculation egqithisileyo ye-iron castings

1. Iziphumo ze-inoculation egqithisileyo ye-iron castings

1.1 Ukuba i-inoculation igqithise, umxholo we-silicon uya kuba phezulu, kwaye ukuba udlula ixabiso elithile, i-silicon brittleness iya kubonakala. Ukuba umxholo we-silicon wokugqibela udlula umgangatho, uya kukhokelela ekugqityweni kwe-A-type graphite; iphinde ithande ukuhla kunye nokunciphisa, kwaye inani le-matrix F liya kwanda; kuya kubakho iperile encinci. Ukuba kukho i-ferrite engaphezulu, amandla aya kuncipha endaweni yoko.

1.2 I-inoculation egqithisileyo, kodwa umxholo wokugqibela we-silicon awudluli umgangatho, kulula ukuvelisa i-shrinkage cavities kunye ne-shrinkage, isakhiwo sihlanjululwa, kwaye amandla aphuculwe.

1.3 Ukuba isixa se-inoculation sikhulu kakhulu, imvula yegraphite iya kuncipha ngexesha lenkqubo yokuqina, ukwandiswa kwe-cast iron kuya kuncipha, ukwanda kwamaqela e-eutectic kuya kubangela ukutya okungahambi kakuhle, kwaye i-shrinkage ye-liquid iya kuba nkulu, kubangele ukuncipha. i-porosity.

1.4 I-inoculation egqithisileyo yentsimbi ye-nodular iya kwandisa inani lamaqela e-eutectic kunye nokwandisa ukuthambekela kokukhulula, ngoko kukho umlinganiselo ofanelekileyo wokugonywa. Kuyimfuneko ukubona ukuba inani lamaqela e-eutectic lincinci kakhulu okanye likhulu kakhulu phantsi kwe-metallography, oko kukuthi, phantsi koxinzelelo Kutheni uhlawule ingqalelo kwisixa se-inoculum, kwaye isizathu sokuba i-inoculum ye-hypereutectic ductile iron ikhulu kakhulu iya kubangela igraphite. ukudada.

2. Indlela yokufaka i-iron castings

2.1 I-Ductile iron shrinkage ngokuqhelekileyo ibangelwa yisantya esicothayo sokupholisa kunye nexesha elide lokuqina, elikhokelela ekugqwethekeni kwegraphite embindini wokuphosa, ukunciphisa inani leebhola, kunye neebhola ezinkulu zegraphite. Ubuninzi be-magnesium eseleyo, lawula ubuninzi bomhlaba onqabileyo oseleyo, ukongeza izinto zokulandelela, ukuqinisa i-inoculation kunye namanye amanyathelo obuchwepheshe.

2.2 Xa i-inoculating kwi-iron ductile, umxholo we-silicon yentsimbi yokuqala etyhidiweyo iphantsi, ebonelela ngeemeko zokwandisa i-inoculation. Ubungakanani be-inoculation bongezwa ngabantu abohlukeneyo bunokwahluka. Kulungile, kodwa akwanelanga.

3. Isixa se-inoculant esongezwa kwi-iron castings

3.1 Indima ye-inoculant: khuthaza i-graphitization, ukuphucula ukuhanjiswa kwemilo kunye nobukhulu begraphite, ukunciphisa ukuthambekela komhlophe, kunye nokwandisa amandla.

3.2 Isixa se-inoculant esongeziweyo: i-0.3% kwisikhwama, i-0.1% kwi-mold, i-0.4% iyonke.