Ma ke kumu hana hou o ka ductile iron manhole covers, hiki iā mākou ke hoʻoheheʻe i ka hao ductile ma o ke kila hoʻolei a me ke kila forged, i hoʻohana nui ʻia i ka ʻoihana hana mechanical i kēia mau lā.ʻO ka ʻoiaʻiʻo, ʻo ke kumu o ka hao ductile ka loaʻa ʻana o ka graphite me ke ʻano like me ka pōleʻa ma o ke kaʻina o ka spheroidization, kahi e hoʻomaikaʻi maikaʻi ai i ka hana o ka hao hao, ʻoi aku ka paʻakikī a me ka paʻakikī, e hopena i ka maikaʻi ma mua o ke kila kalapona.Eia nō naʻe, i mea e hōʻemi ai i nā kumukūʻai, hoʻohana ʻia nā uhi manhole ductile hao me ka hoʻohana ʻana i ke kila hoʻolei a me ke kila.
He mea palupalu ka hao ductile.ʻO ka mea mua, ʻo ka hao hoʻolei ʻia he ʻano kalapona i ʻoi aku ma mua o 2.1% (me ka maʻiʻo kalapona o 3.50-3.90% a me kahi ʻano metallographic o ferrite+pearlite).Inā kiʻekiʻe ka ʻike kalapona, ʻoiaʻiʻo e kiʻekiʻe kona paʻakikī.ʻO ka lua, ʻo ka spheroidizing i ka hao ductile ʻo ia ka emi ʻana o ka nui o nā ʻāpana metala, kahi e hoʻomaikaʻi ai i ka ikaika a me ka paʻakikī o ka mea.No laila, ʻoi aku ka kiʻekiʻe o ka paʻakikī o ka hao ductile (ʻoi aku ka kiʻekiʻe ma mua o ke kila maʻamau).
ʻO ka mea mua, hoʻohana mau ʻia nā kaʻa koʻikoʻi i ke kaʻa ʻana o ke alanui, no laila ke koho maʻamau ʻia nā uhi manhole ductile hao, nona ka hiki ke lawe ma kahi o 40 tons;Hiki i kekahi mau uhi manhole composite ke hoʻokō i ka hiki ke hoʻopaʻa ʻia ma kahi o 25 tons, ʻoi aku ka liʻiliʻi ma mua o ka hao ductile.Eia naʻe, palekana nā uhi manhole hao ductile.
ʻO ka lua, ke hoʻohālikelike ʻia me nā uhi manhole composite, ʻoi aku ka maikaʻi o nā uhi manhole ductile iron e ʻimi ʻia e nā ʻaihue.ʻAʻole i loaʻa wale i ka puʻupuʻu ductile hao ka mana haʻahaʻa maikaʻi, akā e nānā pū i ka hoʻolālā ʻana o kēlā me kēia kikoʻī o nā uhi manhole ductile hao, ʻoi aku ka nui o ka hana anti-ʻaihue, koi maoli i nā ʻaihue i kahi ʻaʻohe ala e hoʻomaka ai. ʻaʻole hiki i kekahi ke ʻaihue.Hiki paha i kekahi poʻe ke hopohopo i ka leo nui o nā uhi hao hao i ka wā e holo ai, ʻaʻole pono ia no ka mea ua noʻonoʻo mākou i kēia pilikia i kā mākou hoʻolālā.Ua mālama ʻia kēlā me kēia uhi manhole ma mua o ka haʻalele ʻana i ka hale hana, hoʻokaʻawale loa i ka pilikia hoʻohaumia leo o nā uhi manhole ductile hao.
ʻO ka mea hope loa, ʻoi aku ka liʻiliʻi o ka hiki ke amo o nā uhi manhole composite ma mua o nā uhi manhole ductile.No nā wahi e like me nā kāʻei ʻōmaʻomaʻo a me nā ʻaoʻao ala ʻaʻole pono ke kaomi nui, ʻoi aku ka haʻahaʻa o ke kumukūʻai o ka hoʻohana ʻana i nā uhi manhole composite ma mua o ka hoʻohana ʻana i nā uhi manhole ductile.
Ka manawa hoʻouna: ʻAukake-10-2023
