Zinc alloyzigawo zoponya kufatsopano akugwiritsidwa ntchito pozungulira zinthu zosiyanasiyana.Zamagetsi zosiyanasiyana ndi zida zamagetsi zazunguliridwa ndi zinthu za zinc alloy die-casting.Choncho, khalidwe lapamwamba la ma castings liyenera kukhala lalitali, ndipo luso labwino la mankhwala likufunika.Choyipa chofala kwambiri chazinthu zopangira zinc alloy ndikuphulika pamwamba.
Makhalidwe olakwika: Pali ma vesicles okwera pamwamba pakufa.① Zapezeka pambuyo poponya kufa;② Kuwululidwa pambuyo kupukuta kapena kukonza;③ Kuwonekera pambuyo kupopera mafuta kapena electroplating;④ Adawonekera atayikidwa kwakanthawi.
Ambiri a matuza pamwamba pa nthaka aloyi aloyi amayamba chifukwa pores, ndipo pores makamaka pores ndi shrinkage mabowo.Ma pores nthawi zambiri amakhala ozungulira, ndipo mabowo ambiri ochepera amakhala osakhazikika.
1. Zomwe zimayambitsa pores: ① Panthawi yodzaza ndi kulimbitsa chitsulo chosungunuka, mabowo amapangidwa pamwamba kapena mkati mwa kuponyera chifukwa cha kulowerera kwa gasi;② mpweya wolowa ndi kusinthasintha kwa zokutira;③ mpweya wa aloyi wamadzimadzi ndi wokwera kwambiri ndipo umalowa mkati mwa kulimba.
2. Zifukwa za shrinkage pabowo: ①Popanga zitsulo zosungunuka, kung'ambika kwachitsulo kumachitika chifukwa cha kuchepa kwa voliyumu kapena gawo lolimba lomaliza silingadyedwe ndi chitsulo chosungunuka;②Kuchulukana kosagwirizana kwa kuponyera kapena kutenthedwa pang'ono kwa kuponyera kumapangitsa gawo lina Kukhazikika kumachedwa, ndipo zibowo zimapangidwira pamwamba pomwe voliyumu imachepa.
Chifukwa cha kukhalapo kwa ma pores ndi ma shrinkage mabowo, mabowo amatha kulowa pamene zigawo zakufa zimayikidwa pamwamba.Pamene kuphika pambuyo kujambula ndi electroplating, mpweya mu dzenje amakula ndi kutentha;kapena madzi omwe ali mu dzenjelo adzasanduka nthunzi, zomwe zingayambitse matuza pamwamba pa kuponyera.
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Nthawi yotumiza: Mar-06-2021