Usoro mkpochapụ ihe owuwu banded

Òtù nke ala-carbon ígwè na ụlọ okpomọkụ deformation nke ferrite na pearlite, ma ọ bụrụ na e nwere ìgwè Ọdịdị nke ferrite na pearlite alternating n'ọnyá nzukọ.Obere carbon steel enweghị nkebi ọkpọkọ ọkpọkọ Ọdịdị, si ụlọ okpomọkụ normalizing okpomọkụ, mgbe via Ac1 okpomọkụ, eutectoid mgbanwe emee, pearlite mgbanwe nke austenite.N'okwu a, ihe ndị ahụ abụghị otu austenite, na okpomọkụ na-ekpo ọkụ karịrị Ac3, ferrite siri ike ngwọta na-agwụcha, mgbe ahụ, a na-agbanwe usoro nke ígwè ahụ na otu-phase austenite, dị ka okpomọkụ na-aga n'ihu na-abawanye na normalizing okpomọkụ incubation. austenite kpamkpam edo.

A tọhapụrụ si normalizing okpomọkụ jụrụ Mgbe incubation, mgbe obi jụrụ ọnụego nke ígwè ikpochapụ nnukwu banded Ọdịdị na oké egwu jụrụ ọnụego (ie, suppression ferrite precipitate si austenite jụrụ ọnụego), ígwè anwụrụ eutectoid ferrite ahụ na-ebelata, nke mere na ferrite anaghị ebute ma wepụ ihe mgbaze foduru na austenite, yana ka okpomọkụ na-ebelata site n'ịbawanye ogo nke supercooling, na agaghị eme ọzọ precipitated pro-eutectoid ferrite, site na ozugbo supercooled austenite decomposition ngwaahịa n'ime eutectoid ferrite + cementite, ma n'adịghị ka eutectoid. ihe mejupụtara ígwè, nke a na-akpọ "pseudo-eutectoid" n'ihi na "pseudo-eutectoid" ọ dịghị eutectoid ferrite ịdị adị nke ahụ, ya mere microstructure nke ígwè banded Ọdịdị adịghị adị.Pipe mkpuchi si butere mgbe normalize okpomọkụ, ndị jụrụ ọnụego bụ ihe na-erughị ka band Ọdịdị nke ígwè iji kpochapụ oké mkpa jụrụ ọnụego nke nwayọọ jụrụ, mgbe okpomọkụ na-ebelata ka Ac3, mbụ depleted carbon steel austenitic ferritic ọdịda mpaghara n'ihu ( The carbon -ogbenye mpaghara nke nne na nna na-adọ banyere ìgwè Ọdịdị), na-ebelata nwayọọ jụrụ na okpomọkụ eutectoid ferrite olu na-eji nwayọọ nwayọọ mụbaa ruo mgbe oyi na-atụ ka Ac1 mgbe austenite n'ime pearlite, na ụlọ okpomọkụ The microstructure nke ígwè, ọ pụtara ferrite na pearlite ìgwè. banded otu nzukọ.


Oge nzipu: Ọktoba 21-2019