Aia nā ʻano kumu ʻelima okila kohu ʻole:austenitic, ferritic, martensitic, duplex, and precipitation hardening.
(1) Austenitic stainless steels ʻaʻole magnetic, a ʻo nā māka kila ʻelele he 18% chromium i hoʻohui ʻia a me kahi nui o ka nickel i hoʻohui ʻia e hoʻonui i ka pale ʻana i ka corrosion.Hoʻohana nui ʻia lākou i nā māka kila.
(2) He magnetic ka Ferrite, a ʻo ka mea chromium ka mea nui, me ka hapa o 17%.Loaʻa i kēia mea ke kūpaʻa oxidation maikaʻi.
(3) ʻO ke kila kila Martensitic he magnetic, ʻo ka maʻiʻo o ka chromium maʻamau he 13%, a loaʻa kahi ʻāpana kūpono o ke kalapona, hiki ke hoʻopaʻakikī ʻia e ke kinai ʻana a me ka hoʻoulu ʻana.
(4) ʻO ka Duplex stainless steel he hui hui ʻia o ferrite a me austenite, ʻo ka ʻike o ka chromium ma waena o 18% a me 28%, a ʻo ka ʻike o ka nickel ma waena o 4.5% a me 8%.Kūleʻa loa lākou i ka chloride corrosion.Nā hopena maikaʻi.
(5)ʻO ka maʻiʻo maʻamau o ka chromium i ke kila kila he 17, a ua hoʻohui ʻia kahi nui o ka nickel, keleawe a me ka niobium, hiki ke paʻakikī e ka ua a me ka ʻelemakule.
E like me ka hana metallographic, hiki ke mahele ʻia i:
(1)Ferritic stainless steel (400 series), chromium stainless steel, ka mea nui i hōʻike ʻia e Gr13, G17, Gr27-30;
(2)Austenitic stainless steel (300 series), chromium-nickel stainless steel, i hōʻike nui ʻia e 304, 316, 321, etc.;
(3)Martensitic stainless steel (200 series), chromium-manganese stainless steel, kiʻekiʻe carbon content, i hōʻike nui ʻia e 1Gr13, etc.
Ka manawa hoʻouna: Sep-28-2022