Ungaziphucula njani iipropathi zoomatshini bentsimbi?
Isinyithi esiyimpunga yintsimbi yentsimbi ekhabhoni apho umphezulu wecandelo ungwevu. Ngokulawulwa kobume kunye nenkqubo yokuqinisa, ikhabhoni ubukhulu becala ibonakala ngohlobo lwegrafite yeflakisi. Ubume besinyithi bentsimbi egreyithi ubukhulu becala yenziwe yiflite grafayithi, isinyithi sematriki kunye nomda wokutya okuziinkozo eutectic.
Ubukho be-flake grafayithi kwigrey yentsimbi itshabalalisa ukuqhubekeka okusisiseko kwesinyithi kwaye yenza i-grey cast iron inyani. Kodwa i-grey yentsimbi yenye yezona zinto zokuqala nezisetyenziswa kakhulu. Isinyithi esingwevu sineempawu ezininzi. Ixesha elide, kwimveliso yokuziqhelanisa, sishwankathele amanye amanyathelo aqhelekileyo okuphucula ukomelela kwe-iron cast cast. Phantsi kweemeko ezithile, sinako ukuphucula ukusebenza ukusika, ukunxiba ukuxhathisa kunye nokwenziwa kukothuka ukusebenza kokufakwa kwesinyithi esingwevu.
Kwimveliso yokuphosa uqobo, uninzi lwesinyithi esingwevu yi-hypoeutectic. Ke ngoko, ukuze kuphuculwe ukuqina kwayo, la manqaku alandelayo kufuneka enziwe kangangoko:
I-1) Isiqinisekiso sesinyithi esingwevu sine-dendrites engaphezulu nangaphezulu ephuculweyo ngexesha lokuqina
2) Ukunciphisa inani le-eutectic grafayithi kwaye uyenze ngokulinganayo isasazwa nge-A-type graphite
3) Yandisa inani lamaqoqo eutectic
4) Ngexesha lenguqu ye-austenite eutectoid, yonke into iguquka ibe yitrust pearlite matrix
Kwimveliso yokwenziwa kwe-cast cast iron cast, sihlala sisebenzisa la manyathelo alandelayo ukufezekisa ezi ziphumo zingasentla:
1) Khetha ukwenziwa kweekhemikhali ngokufanelekileyo
2) Guqula ukwakhiwa kwentlawulo
3) Ubushushu bentsimbi ebutyhidiweyo
4) Unyango lokutofa
5) Ukulandela umkhondo okanye ukuthoba isantya esiphantsi
6) unyango Ubushushu
7) Yandisa isantya sokupholisa ngexesha lotshintsho lwe-eutectoid
Amanyathelo athile aza kuthathwa axhomekeke kuhlobo lokuphoswa kwesinyithi okungwevu, iipropathi ezifunekayo kunye neemeko ezithile zemveliso. Nangona kunjalo, kuhlala kunyanzelekile ukuba uthathe amanyathelo amabini okanye nangaphezulu ukufezekisa intsebenzo oyifunayo yentsimbi.
Ixesha leposi: Dec-28-2020