321 bakin karfe nada bututu

Darajoji 321 da 347 sune ainihin austenitic 18/8 karfe (Grade 304) wanda Titanium (321) ko Niobium (347) ke haɓakawa.Ana amfani da waɗannan maki saboda ba su kula da lalatawar intergranular bayan dumama a cikin kewayon hazo na carbide na 425-850 ° C.Mataki na 321 shine matakin zaɓi don aikace-aikace a cikin kewayon zafin jiki har zuwa kusan 900 ° C, haɗa babban ƙarfi, juriya ga ƙima da kwanciyar hankali na lokaci tare da juriya ga lalatawar ruwa mai zuwa.

Mataki na 321H shine gyare-gyare na 321 tare da babban abun ciki na carbon, don samar da ingantaccen ƙarfin zafi.

Iyakance tare da 321 shine titanium baya canzawa da kyau a cikin babban zafin jiki, don haka ba'a ba da shawarar azaman mai amfani da walda ba.A wannan yanayin an fi son daraja 347 - niobium yana yin aikin daidaitawar carbide iri ɗaya amma ana iya canjawa wuri a cikin baka na walda.Grade 347 shine, saboda haka, daidaitaccen abin amfani don walda 321. Grade 347 ana amfani dashi lokaci-lokaci azaman kayan farantin iyaye.

Kamar sauran austenitic maki, 321 da 347 suna da kyau kwarai forming da walda halaye, suna shirye birki ko nadi-kafa kuma suna da fice waldi halaye.Bayan-weld annealing ba a bukatar.Hakanan suna da kyakkyawan tauri, har zuwa yanayin zafi na cryogenic.Grade 321 ba ya goge da kyau, don haka ba a ba da shawarar yin aikace-aikacen ado ba.

Grade 304L ya fi samuwa a yawancin nau'ikan samfura, don haka ana amfani da shi gabaɗaya a fifiko ga 321 idan buƙatun shine kawai don jure lalatawar intergranular bayan walda.Koyaya, 304L yana da ƙarancin ƙarfin zafi fiye da 321 kuma don haka ba shine mafi kyawun zaɓi ba idan buƙatun shine juriya ga yanayin aiki akan kusan 500 ° C.

Maɓalli Properties

An ƙayyade waɗannan kaddarorin don samfuran da aka yi birgima (faranti, takarda, da coil) a cikin ASTM A240/A240M.Irin wannan amma ba dole ba ne kaddarorin da aka keɓance don wasu samfuran kamar bututu da mashaya a cikin ƙayyadaddun su.

Abun ciki

An ba da jeri na yau da kullun don nau'ikan bakin karfe 321 a cikin tebur 1.

Tebur 1.Abubuwan da aka haɗa don bakin karfe 321-grade

Kayayyakin Injini

An ba da kaddarorin kayan injiniya na yau da kullun don zanen bakin karfe 321 a cikin tebur 2.

Table 2.Kayan inji na bakin karfe 321-grade

Abubuwan Jiki

An ba da kaddarorin zahiri na yau da kullun don saɓo na bakin karfe 321 na bakin karfe a cikin tebur 3.

Table 3.Kaddarorin jiki na bakin karfe mai daraja 321 a cikin yanayin da aka rufe

Kwatanta Ƙirar Maki

Ana ba da kwatancen kwatancen ƙima na bakin karfe 321 a cikin tebur 4.

Table 4.Bayani dalla-dalla ga bakin karfe 321-grade