Kaʻina hana o Ductile Iron Manhole Cover

ʻO nā waiwai mechanical o ka hao hina e pili ana i ka microstructure o ka matrix a me ka morphology o ka graphite.ʻO ka graphite flaky i loko o ka hao hoʻoheheʻe hina e hoʻokaʻawale loa i ka matrix, maʻalahi ka hoʻoulu ʻana i ke koʻikoʻi ma nā kihi ʻoi o ka graphite, e hoʻohaʻahaʻa loa i ka ikaika tensile, plasticity, a me ka paʻakikī o ka hao hina hina ma mua o ke kila.Eia naʻe, ua like kona ikaika compressive me ke kila, a ʻo ia hoʻi ka hao hoʻoheheʻe me nā waiwai mechanical ʻino loa ma waena o nā hoʻolei hao maʻamau.I ka manawa like, loaʻa kekahi hopena o ka matrix i nā waiwai mechanical o ka hao hina hina.ʻO ka graphite flakes o ka ferrite matrix gray cast iron he koʻikoʻi, me ka haʻahaʻa haʻahaʻa a me ka paʻakikī, no laila ʻaʻole i hoʻohana ʻia;ʻO ka graphite flakes o ka pearlite ma muli o ka hao hoʻoheheʻe ʻia he liʻiliʻi, me ka ikaika kiʻekiʻe a me ka paʻakikī, a ua hoʻohana nui ʻia no ka hana ʻana i nā mea koʻikoʻi nui;ʻOi aku ka mānoanoa o ka graphite flakes o ka ferrite pearlite matrix gray cast iron ma mua o ka pearlite gray cast iron, a ʻaʻole maikaʻi kā lākou hana e like me ka pearlite gray cast iron.No laila, hoʻohana pinepine ʻia ka hao hina hina me ka pearlite matrix i ka ʻoihana.