Indlela yokuphucula iimpawu zoomatshini bentsimbi engwevu?
Intsimbi yentsimbi engwevu yintsimbi yekhabhoni ialloy apho indawo yecandelo ingwevu. Ngokulawulwa kokuqulunqwa kunye nenkqubo yokuqinisa, i-carbon ibonakala ngokubonakalayo kwi-flake graphite. Isakhiwo se-metallographic ye-grey cast cast iron ikakhulu yenziwe nge-flake graphite, i-metal matrix kunye ne-gray boundary eutectic.
Ubukho be-flake ye-graphite kwi-iron etyhidiweyo engwevu yonakalisa ukuqhubeka kwesiseko sesinyithi kwaye yenza intsimbi engwevu ibe yinto enqabileyo. Kodwa intsimbi engwevu yenye yezona zinto zakuqala kwaye zisetyenziswa kakhulu.Iintsimbi ezingwevuzineempawu ezininzi. Ixesha elide, ekusebenzeni kwemveliso, siye sashwankathela amanyathelo aqhelekileyo okuphucula ukomelela kwentsimbi engwevu. Ngaphantsi kweemeko ezithile, sinokuphinda siphucule ukusebenza kokusika, ukuxhathisa ukunxiba kunye nokusebenza kokutshatyalaliswa kwentsimbi engwevu.
Kwimveliso yokwenyani yokuphosa, uninzi lwentsimbi engwevu yi-hypoeutectic. Ke ngoko, ukuze kuphuculwe amandla ayo okuqina, la manqaku alandelayo kufuneka enziwe kangangoko kunokwenzeka:
1) Qinisekisa ukuba intsimbi engwevu ine-austenite dendrites ephuhliswe kakhulu ngexesha lokuqina
2) Nciphisa inani le-eutectic graphite kwaye wenze ukuba isasazwe ngokulinganayo nge-A-type graphite.
3) Ukwandisa inani lamaqela e-eutectic
4) Ngexesha lokuguqulwa kwe-austenite eutectoid, zonke ziguqula zibe yi-matrix ye-pearlite entle
Kwimveliso eyiyo yokuphosa intsimbi engwevu, sihlala sisebenzisa la manyathelo alandelayo ukuphumeza ezi ziphumo zingentla:
1) Khetha ukubunjwa kweekhemikhali ezifanelekileyo
2) Guqula ukubunjwa kwentlawulo
3) Ukufudumala kwentsimbi etyhidiweyo
4) Unyango lwe-inoculation
5) Umkhondo okanye i-alloying ephantsi
6) Unyango lokushisa
7) Ukunyusa izinga lokupholisa ngexesha lokuguqulwa kwe-eutectoid
Amanyathelo athile aza kuthathwa axhomekeke kuhlobo lwe-grey cast iron castings, iipropati ezifunekayo kunye neemeko ezithile zokuvelisa. Nangona kunjalo, kudla ngokuyimfuneko ukuthatha amanyathelo amabini okanye ngaphezulu ukufezekisa ukusebenza okufunwayo kwentsimbi.
Ixesha lokuposa: Dec-28-2020