Sintering ndondomeko ya MIM

Tiyeni tipitilize kuwonetsa njira zonse zaukadaulo wa Metal Injection Molding.

Lero tikambirana za sintering yomwe ili mfundo zofunika kwambiri pa MIM.

KUDZIWA KWAMBIRI KWA KUSINTHA

1) Sintering ndi kutentha ndi kumva ufa wopangidwa pa kutentha pang'ono kuposa malo osungunuka a zigawo zake zazikulu, ndiyeno kuziziziritsa mwa njira inayake ndi liwiro, potero kuwongolera strenth ndi zosiyanasiyana thupi ndi makina katundu wa yaying'ono ndi kupeza. kapangidwe ka metallographic.

2) Njira yayikulu ndi Powder compact-Furnace Charging-Sintering kuphatikiza Preheating, Heat Preservation and Cooling-Firing-Sintered products.

3) Ntchito ya sintering ndikupeza kuchotsa mafuta, kugwirizanitsa zitsulo, kufalikira kwa zinthu, kusintha kwa mawonekedwe, microstructure ndi kupewa ocidation.

KUYAMBIRA KWACHIWIRI KWA NJIRA YA SINTERING

1) Kutentha kochepa Pre-sintering stage:

Mu siteji iyi, kuchira zitsulo, volatilization wa adsorbed mpweya ndi chinyezi, kuwonongeka ndi kuchotsa kupanga wothandizila mu yaying'ono.

2) Kutentha kwapakati kutentha sintering siteji:

Recrystallization imayamba panthawiyi.Choyamba, njere za kristalo zopunduka zimabwezeretsedwa mkati mwa tinthu tating'onoting'ono ndikukonzedwanso kukhala njere zatsopano za kristalo.Panthawi imodzimodziyo, ma oxides pamwamba pa tinthu tating'onoting'ono amachepetsedwa, ndipo mawonekedwe a tinthu amapanga khosi la sintering.

3) Kutetezedwa kwa kutentha kwanthawi yayitali kuti mutsirize gawo la sintering:

Gawo ili ndilo ndondomeko yaikulu ya sintering, monga kufalikira ndi kutuluka kwathunthu ndikuyandikira kutha, kupanga pores ambiri otsekedwa, ndikupitiriza kuchepa, kotero kuti kukula kwake ndi chiwerengero cha pores kumachepetsedwa, ndi kachulukidwe. thupi sintered kwambiri kuchuluka.

4) siteji yozizira:

The sintering ndondomeko yeniyeni ndi sintering mosalekeza, kotero ndondomeko kuchokera sintering kutentha pang'onopang'ono kuzirala kwa nthawi ndiyeno mofulumira kuzirala mpaka linanena bungwe ng'anjo kufika firiji kutentha ndi siteji kumene austenite kuwola ndipo dongosolo lomaliza limapangidwa pang'onopang'ono.

Pali zinthu zambiri zomwe zimakhudza njira ya sintering.Ndipo zinthu monga kutentha, nthawi, mlengalenga, kapangidwe ka zinthu, njira ya aloyi, zopangira mafuta ndi njira zoyatsira monga kutentha ndi kuzizira.Zitha kuwoneka kuti ulalo uliwonse uli ndi chikoka chofunikira pamtundu wa sintering.Kwa mankhwala okhala ndi mapangidwe osiyanasiyana ndi ufa wosiyana, magawo osiyanasiyana amayenera kusinthidwa.