Kupu whakataki ki
Ko te 304 maitai he kowiri tira tino noa, e mohiotia ana ko te 18/8 he kowiri tira i roto i te ahumahi.He pai ake tona parenga waikura i te 430 he kowiri tira, engari he iti ake te utu i te 316 he kowiri tira, no reira ka whakamahia nuitia i roto i te ao, penei: etahi taputapu tepu kowiri tira teitei, reera rino kowiri tira o waho, me etahi atu. Ahakoa ko te 304 te maitai. tino noa i roto i Haina, te ingoa "304 maitai" mai i te United States.He maha nga tangata e whakaaro ana ko te 304 maitai he ingoa tauira i Hapani, engari ko te tino korero, ko te ingoa mana o 304 maitai i Hapani ko "SUS304".Ko te rino 304 he momo kowiri tira o te ao, e whakamahia nuitia ana i roto i te hanga taputapu me nga waahanga e hiahia ana kia pai te mahi matawhānui (te aukati i te waikura me te hangai).Hei pupuri i te parenga waikura i roto i te kowiri tira, me nui ake i te 16% te chromium me te 8% te ihirangi nickel i roto i te maitai.Ko te 304 kowiri tira he parani kowiri tira i hangaia i runga i te paerewa ASTM Amerika.Ko te 304 he rite ki te 0Cr18Ni9 kowiri tira i to tatou whenua.
Hangahanga matū
Ko te karaehe matū o 304 maitai ko 06Cr19Ni10 (koeke tawhito -0Cr18Ni9) kei roto 19% chromium me 8-10% nickel.
C Si Mn PS Cr Ni (nickel) Mo
SUS304 hanganga matū ≤0.08 ≤1.00 ≤2.00 ≤0.05 ≤0.03 18.00-20.00 8.00~10.50
Kiato o te kiato
Ko te kiato o te kowiri tira 304 he 7.93g /cm3
Taonga tinana
σb (MPa)≥515-1035 σ0.2 (MPa)≥205 δ5 (%)≥40
Pakeke:≤201HBW;≤92HRB;≤210HV
Paerewa o
Mo te 304 maitai he tawhā tino nui, ka whakatau tika i tana aukati waikura, engari ka whakatau ano i tona uara.Ko nga mea tino nui i roto i te 304 maitai ko Ni me Cr, engari kaore i te iti ki enei waahanga e rua.Ko nga whakaritenga motuhake kua tohua e nga paerewa hua.Ko te whakatau noa o te ahumahi e whakapono ana i te mea he nui ake te ihirangi Ni i te 8%, ko te ihirangi Cr he nui atu i te 18%, ka taea te whakaaro ko te 304 te maitai.Koinei te take i kiia ai e te ahumahi tenei momo kowiri tira 18/8 kowiri tira.Ko te tikanga, ko nga paerewa hua e tika ana mo te 304 maitai he tino marama nga tikanga, me enei paerewa hua mo nga ahua rereke o te kowiri tira me etahi rereke.
Wā tuku: Akuhata-03-2023
