Duplex bakin karfe suna lissafin> 80% na yawan amfani da duplex, super duplex da hyper duplex maki. An haɓaka shi a cikin shekarun 1930 don aikace-aikace a cikin takarda da kera ɓangaren litattafan almara, gami da duplex sun dogara ne akan abun da ke cikin 22% Cr da gauraye austenitic: ferritic microstructure wanda ke ba da kyawawan kaddarorin inji.
Idan aka kwatanta da jeneriki 304/316 austenitic bakin karfe, dangin duplex maki yawanci suna da ƙarfi sau biyu kuma suna ba da haɓaka mai mahimmanci a cikin juriya na lalata. Ƙara abun ciki na chromium na bakin karfe zai ƙara juriyar lalata su. Koyaya, Lamban Resistance Equivalent Number (PREN) wanda ke ba da juriyar juriya ga lalata lalata kuma ya haɗa da wasu abubuwa da yawa a cikin tsarin sa. Ana iya amfani da wannan dabarar don bayyana yadda bambanci tsakanin UNS S31803 da UNS S32205 ya bunkasa da kuma ko yana da mahimmanci.
Bayan haɓakar bakin karfe na duplex, an kama ƙayyadaddun su na farko azaman UNS S31803. Koyaya, da yawa daga cikin manyan masana'antun sun kasance koyaushe suna samar da wannan darajar har zuwa babban ƙarshen ƙayyadaddun izini. Wannan ya nuna sha'awar su don haɓaka aikin lalata na gami, taimakon haɓaka aikin sarrafa ƙarfe na AOD wanda ya ba da damar sarrafa abun da ke ciki. Bugu da ƙari, ya kuma ba da damar yin tasiri ga matakin ƙarar nitrogen, maimakon kawai a matsayin tushen asali. Saboda haka, mafi girman aikin duplex grade ya nemi haɓaka matakan chromium (Cr), molybdenum (Mo) da nitrogen (N). Bambanci tsakanin alloy duplex wanda abun da ke ciki ya hadu da kasan ƙayyadaddun bayanai, sabanin wanda ya kai saman ƙayyadaddun bayanai na iya zama maki da yawa dangane da dabarar PREN =% Cr + 3.3% Mo + 16 % N.
Don bambance bakin karfe mai duplex da aka samar a saman ƙarshen kewayon abun, an gabatar da ƙarin bayani, wato UNS S32205. Duplex bakin karfe da aka yi wa taken S32205 (F60) zai cika taken S31803 (F51), yayin da baya ga gaskiya. Saboda haka S32205 za a iya zama dual-certified kamar yadda S31803.
| Daraja | Ni | Cr | C | P | N | Mn | Si | Mo | S |
| S31803 | 4.5-6.5 | 21.0-23.0 | Matsakaicin 0.03 | Matsakaicin 0.03 | 0.08-0.20 | Matsakaicin 2.00 | Matsakaicin 1.00 | 2.5-3.5 | Matsakaicin 0.02 |
| S32205 | 4.5-6.5 | 22-23.0 | Matsakaicin 0.03 | Matsakaicin 0.03 | 0.14-0.20 | Matsakaicin 2.00 | Matsakaicin 1.00 | 3.0-3.5 | Matsakaicin 0.02 |
SAKYSTEEL yana samar da cikakken kewayon bakin karfe mai duplex a matsayin abokin rarraba Sandvik da aka fi so. Muna adana S32205 a cikin masu girma dabam daga 5/8 ″ har zuwa diamita 18 ″ a mashaya zagaye, tare da yawancin samfuranmu suna cikin matakin Sanmac® 2205, wanda ke ƙara 'ingantattun injina azaman ma'auni' ga sauran kaddarorin. Bugu da kari, muna kuma adana kewayon S32205 m mashaya daga sito na Burtaniya, da farantin har zuwa 3 ″ daga shagon mu na Portland, Amurka.
Lokacin aikawa: Oktoba-25-2019