Pakati pa mitundu yosiyanasiyana ya chitsulo chosapanga dzimbiri, magiredi 304, 304L, ndi 304H amagwiritsidwa ntchito kwambiri. Ngakhale kuti angawoneke ofanana, magiredi aliwonse ali ndi makhalidwe ake apadera komanso ntchito zake.
GirediChitsulo chosapanga dzimbiri cha 304Ndi zitsulo zosapanga dzimbiri zomwe zimagwiritsidwa ntchito kwambiri komanso zosinthasintha mwa zitsulo zosapanga dzimbiri 300. Ili ndi 18-20% chromium ndi 8-10.5% nickel, pamodzi ndi mpweya wochepa, manganese, ndi silicon. Mtundu uwu uli ndi kukana dzimbiri bwino komanso umatha kupanga bwino. Nthawi zambiri umagwiritsidwa ntchito pazinthu monga zida za kukhitchini, kukonza chakudya, komanso kukongoletsa nyumba.
Chitoliro chachitsulo chosapanga dzimbiri cha 304Lndi chitoliro chachitsulo chotsika cha kaboni cha giredi 304, chokhala ndi kaboni wochuluka wa 0.03%. Kuchuluka kwa kaboni kotsika kumeneku kumathandiza kuchepetsa mvula ya carbide panthawi yowotcherera, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito powotcherera. Kuchuluka kwa kaboni kotsika kumachepetsanso chiopsezo cha sensitization, komwe ndi kupangika kwa chromium carbides pamalire a tirigu, zomwe zingayambitse dzimbiri pakati pa tinthu tating'onoting'ono. 304L nthawi zambiri imagwiritsidwa ntchito powotcherera, komanso malo omwe chiopsezo cha dzimbiri chimakhala chodetsa nkhawa, monga kukonza mankhwala ndi zida zamankhwala.
Chitsulo chosapanga dzimbiri cha 304HNdi mtundu wapamwamba wa kaboni wa giredi 304, wokhala ndi kuchuluka kwa kaboni kuyambira 0.04-0.10%. Kuchuluka kwa kaboni kumapereka mphamvu yabwino kwambiri pa kutentha kwambiri komanso kukana kugwedezeka. Izi zimapangitsa 304H kukhala yoyenera kugwiritsidwa ntchito pa kutentha kwambiri, monga zotengera zopanikizika, zosinthira kutentha, ndi ma boiler amafakitale. Komabe, kuchuluka kwa kaboni kumapangitsanso kuti 304H ikhale yotetezeka kwambiri ku sensitization ndi dzimbiri pakati pa granular, makamaka pakugwiritsa ntchito welding.
Mwachidule, kusiyana kwakukulu pakati pa magiredi awa ndi kuchuluka kwa kaboni komwe kulipo komanso momwe amagwiritsidwira ntchito pakuwotcherera ndi kutentha kwambiri. Giredi 304 ndiye yomwe imagwiritsidwa ntchito kwambiri komanso cholinga chachikulu, pomwe 304L ndiye chisankho chomwe chimakondedwa kwambiri pakugwiritsa ntchito kuwotcherera ndi malo omwe dzimbiri ndi vuto. 304H ili ndi kuchuluka kwa kaboni wambiri ndipo ndi yoyenera kugwiritsidwa ntchito kutentha kwambiri, koma kuthekera kwake kukhudzidwa ndi kuzizira komanso kuzizira pakati pa granular kumafuna kuganiziridwa mosamala. Posankha pakati pa magiredi awa, ndikofunikira kuganizira zofunikira za ntchitoyi, kuphatikiza malo ogwirira ntchito, kutentha, ndi zosowa za kuwotcherera.
GULU LA MFUMU
Adilesi
Malo oyendetsera chitukuko cha Kangsheng,
Chigawo cha Wuqing, mzinda wa Tianjin, China.
Maola
Lolemba-Lamlungu: Utumiki wa maola 24
Nthawi yotumizira: Ogasiti-08-2024