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Chiyambi Katundu WofunikaKapangidwe Katundu wa MakinaKatundu WathupiMafotokozedwe a GirediMagiredi Ena OyerekezaKukana KudzimbiriChithandizo cha KutenthaKuwotchereraKumalizaMapulogalamu
Fe, <0.3% C, 10.5-12.5% ​​Cr, 0.3-1.0% Ni, <1.5% Mn, <1.0% Si, <0.4% P, <0.15% S, <0.03% N
Chitsulo chosapanga dzimbiri cha Giredi 3CR12 ndi mtundu wotsika mtengo wa chromium wokhala ndi chitsulo chosapanga dzimbiri chopangidwa mwa kusintha mawonekedwe a chitsulo cha giredi 409. Chimalimbana ndi dzimbiri pang'ono komanso kuwonongeka konyowa. Poyamba chinapangidwa ndi Columbus Stainless Company pansi pa chizindikiro cholembetsedwa "3CR12". Mayina ena a giredi iyi ndi UNS S40977/S41003 ndi 1.4003.
Ma grade ena ofanana ndi ma grade a 3CR12 akuphatikizapo ma grade a ASME SA240, ma grade a ASTM A240/A240M, ndi EN 10088.2. Komabe, EN 10028.7 imakhudzanso kalasi 1.4003, yomwe imapanga chitsulo chosapanga dzimbiri chogwiritsidwa ntchito pokakamiza.
Magawo otsatirawa apereka makhalidwe ofunikira a coil yachitsulo chosapanga dzimbiri ya 3CR12, pepala ndi mbale mogwirizana ndi Euronorm S41003, S40977, ASTM A240/A240M ndi EN 10088.2 1.4003.
Zomwe zili pamwambapa ndi kufananiza kopanda tanthauzo. Gome ili likufuna kupereka kufananiza kwa zinthu zofanana ndi ntchito, ndipo zofunikira sizovomerezeka. Zofunikira zoyambirira zitha kutsimikiziridwa ngati pakufunika zofanana zenizeni.
Chitsulo chosapanga dzimbiri cha Giredi 3CR12 chingagwiritsidwe ntchito m'malo omwe aluminiyamu, galvanized kapena carbon steel sizipereka zotsatira zabwino chifukwa cha kukana kwake ku asidi amphamvu ndi maziko, komanso kusweka komwe kumachitika chifukwa cha chloride stress corrosion. Komabe, mosiyana ndi Giredi 304, Giredi 3CR12 ili ndi kukana kochepa kwambiri ku ming'alu ndi dzimbiri lozungulira pamaso pa ma chloride.
Pansi pa mikhalidwe yozungulira, giredi ya 3CR12 yakhala ikutha kupirira madzi ndi ma chloride, chifukwa kuwononga kwa kuchuluka kwa chloride kumachepetsedwa ndi ma ayoni a nitrate ndi sulfate. Chimodzi mwa zoyipa zazikulu za giredi ya 3CR12 ndikuti pamwamba pa chinthucho pamakhala dzimbiri pang'ono pamene pali malo aliwonse. Ndi chifukwa chake chinthucho chimangogwiritsidwa ntchito pokongoletsa.
Chitsulo chosapanga dzimbiri cha 3CR12 chimatha kupirira kutentha pakati pa 600 ndi 750°C pamene pali mpweya komanso pakati pa 450 ndi 600°C pamene chili ndi mpweya wopanikizika. Chitsulocho chimakhala cholimba chifukwa cha kutentha kwa nthawi yayitali pakati pa 450 ndi 550°C. Komabe, chitsulocho sichitaya mphamvu yake yolimbana ndi kutentha kwa kutentha kumeneku.
Chitsulo chosapanga dzimbiri cha Giredi 3CR12 chimayikidwa pa kutentha kwa 700 mpaka 750°C, kugawidwa m'magawo a 25mm, gawo lililonse linyowetsedwa kwa maola 1.5. Kenako lolani kuti chizizizire. Samalani kuti musaumitse panthawi yotenthetsera. Kapangidwe ka makina ndi kukana dzimbiri kwa giredi iyi zimakhudzidwa ndi njira yozimitsira.
Njira zowotcherera zomwe zimagwiritsidwa ntchito pa zitsulo zosapanga dzimbiri za austenitic zitha kugwiritsidwa ntchito pa zitsulo zosapanga dzimbiri za kalasi 3CR12. Ganizirani zaukadaulo wolowetsa kutentha pang'ono monga GMAW (MIG) ndi GTAW (TIG). Mu kuwotcherera, waya wodzaza wa kalasi 309 wotsimikiziridwa kale kuti ndi AS 1554.6 ndi womwe umakondedwa. Komabe, waya wa kalasi 308L, 316L, 309Mo ndi 309L umagwiritsidwanso ntchito nthawi zambiri. Kusintha kulikonse kwa mtundu wa chinthu chogulitsidwa kumatha kuchotsedwa pogwiritsa ntchito mpweya wothandizira kapena njira monga kuyeretsa ndi kusonkhanitsa.
Kutha kwa makina a chitsulo chosapanga dzimbiri cha 3CR12 ndi pafupifupi 60% ya chitsulo chofewa. Kuchuluka kwa ntchito yawo yolimba ndi kochepa kuposa kwa chitsulo cha austenitic, kotero palibe njira zapadera zomangira zomwe zimafunikira.
Mapepala achitsulo chosapanga dzimbiri a Giredi 3CR12 amapezeka mu mawonekedwe okhazikika a Hot Rolled Annealed and Pickled (HRAP), ndipo ma coil amapezeka mu mawonekedwe a 2B kapena 2D. Ma finishes akuda amathanso kupangidwa kuchokera ku zinthu zotenthedwa, zomwe zimasiya malo akuda osungunuka pachitsulocho. Ma finishes akuda a Giredi 3CR12 ali ndi kukana bwino dzimbiri komanso kukanda kochepa, kotero ndi oyenera kugwiritsidwa ntchito mosiyanasiyana.
Mmawa wabwino Richard, ndikusangalala kukupatsirani kuchuluka kulikonse kwa 3Cr12. Timapereka zinthu pansi pa dzina la Cromgard C12. Chonde ndiyimbireni pa 719-597-2423. Jane Robinson.
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