Kedu ka esi emeziwanye ihe eji arụ ọrụ nke nkedo isi awọ?
Ígwè nkedo isi awọ bụ ígwè-carbon alloy nke akụkụ akụkụ ya na-acha ntụ ntụ. Site na njikwa nke ihe mejupụtara na usoro siri ike, carbon na-apụtakarị n'ụdị graphite flake. Ọdịdị metallographic nke ígwè nkedo isi awọ bụ nke ihe mejupụtara ya bụ flake graphite, metal matrix na eutectic ókè ọka.
Ịdị adị nke graphite flake n'ime ígwè nkedo isi awọ na-emebi isi ihe na-aga n'ihu nke ọla ahụ ma mee ka nkedo isi awọ bụrụ ihe na-akụkụ. Ma ígwè nkedo isi awọ bụ otu n'ime ihe ọla mbụ na nke a na-ejikarị eme ihe.Ihe nkedo ígwè isi awọnwere ọtụtụ ihe onwunwe. Ruo ogologo oge, na omume mmepụta, anyị achịkọtala ụfọdụ usoro a na-ejikarị eme ihe iji melite ike nkwụsị nke nkedo isi awọ. N'okpuru ọnọdụ ụfọdụ, anyị nwekwara ike imeziwanye arụmọrụ ịkpụ, na-eyi nkwụsi ike na ịrụ ọrụ mmịkọ ujo nke nkedo isi awọ.
Na mmepụta nkedo n'ezie, imirikiti igwe nkedo isi awọ bụ hypoeutectic. Ya mere, iji meziwanye ike ike ya, ekwesịrị ime isi ihe ndị a dịka o kwere mee:
1) Na-ekwe nkwa na nkedo isi awọ nwere ọtụtụ dendrites bụ isi austenite n'oge ike.
2) Belata ọnụọgụ eutectic graphite wee mee ka ọ na-ekesa ya nke ọma na ụdị graphite A.
3) Na-abawanye ọnụ ọgụgụ nke eutectic ụyọkọ
4) N'oge mgbanwe eutectoid austenite, ihe niile na-agbanwe ghọọ ezigbo pearlite matrix
Na mmepụta nke nkedo nkedo isi awọ, anyị na-ejikarị usoro ndị a iji nweta nsonaazụ dị n'elu:
1) Họrọ ihe mejupụtara kemịkalụ nwere ezi uche
2) Gbanwee ihe mejupụtara nke ụgwọ ahụ
3) Igwe a wụrụ awụ karịrị akarị
4) ọgwụgwọ inoculation
5) Chọpụta ma ọ bụ ala alloying
6) ọgwụgwọ okpomọkụ
7) Na-abawanye ọnụego jụrụ oyi n'oge mgbanwe eutectoid
Usoro ndị a kapịrị ọnụ a ga-eme dabere n'ụdị nkedo ígwè isi awọ, ihe ndị achọrọ na ọnọdụ mmepụta ihe. Otú ọ dị, ọ na-adịkarị mkpa ịme ihe abụọ ma ọ bụ karịa iji nweta ọrụ a chọrọ nke ígwè nkedo.
Oge nzipu: Dec-28-2020