1. Na biyu ƙarni na duplex karfe bakin karfe bututu yana da halaye na matsananci-low carbon, low nitrogen, hankula abun da ke ciki Cr5% Ni0.17% n da 2205 mafi girma nitrogen abun ciki fiye da ƙarni na farko na duplex karfe bakin karfe bututu, wanda inganta. juriya ga lalatawar danniya da juriya na kafofin watsa labarai na acidic tare da babban adadin ion chloride.Nitrogen wani abu ne mai ƙarfi na austenite.Bugu da kari na nitrogen a duplex bakin karfe ba kawai inganta roba da kuma taurin karfe ba tare da bayyananne lalacewa, amma kuma inganta ƙarfin karfe, da kuma hana hazo da kuma jinkiri na carbides.
2. Ayyukan ƙungiya: A cikin greenhouse, austenite da ferrite suna lissafin kusan rabin ingantaccen bayani, wanda ke da halaye na tsarin biphase.Yana riƙe da halaye na ƙananan adadin ferritic bakin karfe conductors, juriya ga pitting, fatattaka da chloride danniya lalata, tare da mai kyau tauri, low embrittlement zafin jiki, jure intergranular lalata da inji Properties da kyau weldability.
3. A karkashin wannan matsa lamba sa yanayi na iya ajiye kayan, yawan amfanin ƙasa ƙarfi da danniya lalata juriya na duplex karfe bakin karfe bututu ne kusan 1 sau na austenitic bakin karfe, da mikakke fadada coefficient ne kasa da austenitic bakin karfe na austenitic bakin karfe. tsarin karfe, kuma ƙananan ƙarfe na carbon yana kusa da shi.Ƙirƙirar sanyi ba ta da kyau kamar austenitic bakin karfe.
4. Weldability: duplex karfe bakin karfe bututu 2205 yana da kyau weldability, waldi sanyi, zafi crack ji na ƙwarai ne kananan, yawanci babu preheating kafin waldi, babu zafi magani bayan waldi.Saboda ƙananan dabi'un ferrite guda ɗaya da babban abun ciki na nitrogen a cikin yankin da ya shafa zafi, ana iya sarrafa makamashin walda a wannan lokacin lokacin da aka zaɓi kayan walda da kyau, kuma cikakken aikin yana da kyau.
5. Tsatsa mai zafi: Haɓakar zafi mai zafi yana da ƙasa da na austenitic bakin karfe.Wannan shi ne saboda abubuwan da ke cikin nickel ba su da yawa, ƙazantattun abubuwan da ke da sauƙi don samar da ƙananan eutectic mai narkewa suna da ƙananan, fim din ruwa tare da ƙananan narkewa ba shi da sauƙi don samar da shi, kuma saurin girma na haɗarin hatsi ba ya wanzu a babban. yanayin zafi.
6. Brittleness na zafi shafi yankin: Babban matsalar walda na duplex karfe bakin karfe bututu ne zafi shafi yankin.Saboda saurin sanyaya tasirin yankin da zafi ya shafa a cikin yanayin rashin daidaituwa na yanayin zagayowar walda, ana samun ƙarin sanyaya ferrite koyaushe, wanda ke haɓaka haɓakar lalata da fashewar hydrogen.
7. Welding metallurgy: A lokacin aikin walda na duplex bakin karfe, a karkashin aikin thermal hawan keke, da microstructure da zafi-tasiri yankin na weld karfe sun fuskanci jerin canje-canje.A yanayin zafi mai girma, ƙananan ƙarfe na bakin karfe na duplex yana haɓaka ta ferrite da austenite yayin sanyaya.Yawan hazo austenite yana shafar abubuwa da yawa.
Lokacin aikawa: Juni-26-2023