1. Halayen ayyuka, amfani da abubuwan da suka dace
SA302GrB ƙaramin ƙarfe ne mai ƙarfi mai ƙarfi manganese-molybdenum-nickel alloy karfe farantin karfe wanda ke cikin ma'aunin ASTM A302 kuma an ƙera shi don babban zafin jiki da kayan aiki mai ƙarfi kamar tasoshin matsa lamba da tukunyar jirgi. Babban halayen aikin sa sun haɗa da:
Kyawawan kaddarorin injiniyoyi: ƙarfi mai ƙarfi ≥550 MPa, ƙarfin samar da ƙarfi ≥345 MPa, haɓakawa ≥18%, da ƙarfin tasiri ya dace da daidaitattun ASTM A20.
Kyakkyawan aikin walda: yana goyan bayan waldawar baka na hannu, waldawar arc mai nutsewa, waldawar iskar gas da sauran matakai, ana buƙatar preheating da maganin zafi bayan walda don hana fasa.
High zafin jiki juriya da lalata juriya: Ya kasance barga a cikin aiki zazzabi kewayon -20 ℃ zuwa 450 ℃, dace da lalata kafofin watsa labarai muhallin kamar acid da alkalis.
Nauyi mai sauƙi da ƙarfin ƙarfi: Ta hanyar ƙirar ƙirar ƙirar ƙira, yayin da rage nauyin tsarin, ƙarfin ƙarfin ƙarfin ƙarfin yana inganta kuma an rage farashin masana'anta na kayan aiki.
Abubuwan da za a iya amfani da su: kayan aiki masu mahimmanci a fannonin petrochemicals, tukunyar wutar lantarki, tashar makamashin nukiliya, samar da wutar lantarki, da dai sauransu, irin su reactors, masu musayar zafi, tankuna masu zagaye, tasoshin matsa lamba na makamashin nukiliya, ganguna, da dai sauransu.
2. Babban abubuwan da aka gyara, sigogin aiki da kayan aikin injiniya
Abubuwan sinadaran (nazarin narkewa):
C (carbon): ≤0.25% (≤0.20% lokacin kauri ≤25mm)
Mn (manganese): 1.07% -1.62% (1.15% -1.50% lokacin kauri ≤25mm)
P (phosphorus): ≤0.035% (wasu matakan suna buƙatar ≤0.025%)
S (sulfur): ≤0.035% (wasu matakan suna buƙatar ≤0.025%)
Si (siliki): 0.13% -0.45%
Mo (molybdenum): 0.41% -0.64% (wasu matakan suna buƙatar 0.45% -0.60%)
Ni (nickel): 0.40% -0.70% (wasu kewayon kauri)
Sigar ayyuka:
Ƙarfin juzu'i: 550-690 MPa (80-100 ksi)
Ƙarfin Haɓaka: ≥345 MPa (50 ksi)
Tsawaitawa: ≥15% lokacin da tsayin ma'auni shine 200mm, ≥18% lokacin ma'auni shine 50mm
Yanayin jiyya na zafi: Bayarwa a cikin daidaitawa, daidaitawa + yanayin zafi ko yanayin jujjuyawar sarrafawa, ana buƙatar daidaita jiyya lokacin da kauri> 50mm.
Fa'idodin aikin injiniya:
Ma'auni na babban ƙarfi da taurin: A 550-690 MPa ƙarfin ƙarfi, har yanzu yana kula da haɓakar ≥18%, yana tabbatar da ikon kayan aiki don tsayayya da karaya.
Tsarin hatsi mai kyau: Ya dace da buƙatun girman hatsi masu kyau na ma'aunin A20/A20M kuma yana haɓaka ƙarfin tasirin ƙarancin zafin jiki.
3. Aikace-aikace lokuta da abũbuwan amfãni
Masana'antar Petrochemical:
Application case: A petrochemical sha'anin yana amfani da SA302GrB karfe faranti don kerarre high-matsi reactors, wanda aka ci gaba da gudana har tsawon shekaru 5 a 400 ℃ da 30 MPa ba tare da fasa ko nakasawa.
Abũbuwan amfãni: Kyakkyawan juriya ga lalata hydrogen, da kuma 100% ultrasonic flaw detection na welds yana tabbatar da amincin kayan aiki.
Filin tashar makamashin nukiliya:
Shari'ar aikace-aikacen: Jirgin ruwa mai matsa lamba na tashar makamashin nukiliya yana ɗaukar farantin karfe SA302GrB tare da kauri na 120mm. Ta hanyar daidaitawa + kula da zafin jiki, ana inganta juriya na radiation da 30%.
Amfani: Abubuwan da ke cikin molybdenum na 0.45% -0.60% yana hana haɓakar iska na neutron kuma ya cika buƙatun ƙayyadaddun ASME.
Filin tukunyar wutar lantarki:
Aikace-aikacen akwati: A supercritical tukunyar jirgi drum rungumi dabi'ar SA302GrB karfe farantin karfe, wanda aiki a 540 ℃ da 25 MPa, da kuma ta sabis rayuwa da aka mika zuwa shekaru 30.
Amfani: Babban zafin jiki na ɗan gajeren lokaci ya kai 690 MPa, wanda shine 15% haske fiye da carbon karfe kuma yana rage yawan makamashi.
Filin samar da wutar lantarki:
Application case: The high-matsi ruwa bututu na wani hydropower ta rungumi SA302GrB karfe farantin da wuce 200,000 gajiya gwaje-gwaje a cikin wani yanayi na -20 ℃ zuwa 50 ℃.
Fa'ida: Ƙananan tasirin tasirin zafin jiki (≥27 J a -20 ℃) ya sadu da matsanancin yanayin yanayi na wuraren tsaunuka.
4. Tsaro, kare muhalli da mahimmancin masana'antu
Tsaro:
An wuce gwajin tasirin tasirin ASTM A20 (makamashi tasirin V-notch ≥34 J a -20 ℃), yana tabbatar da haɗarin karyewar ƙarancin zafin jiki ƙasa da 0.1%.
Taurin yankin da zafi ya shafa na walda shine ≤350 HV don hana fashewar hydrogen.
Kariyar muhalli:
Abubuwan da ke cikin molybdenum na 0.41% -0.64% yana rage amfani da nickel kuma yana rage fitar da ƙarfe mai nauyi.
Ya bi umarnin RoHS na EU kuma ya hana amfani da abubuwa masu cutarwa kamar gubar da mercury.
Muhimmancin masana'antu:
Yana da kashi 25% na kasuwar farantin karfe ta duniya kuma muhimmin abu ne don gano ikon nukiliya da kayan aikin petrochemical.
Yana goyan bayan aikace-aikacen kewayon zafin jiki mai faɗi daga -20 ℃ zuwa 450 ℃, kuma yana haɓaka ingantaccen aiki na kayan aiki ta 15% -20% idan aka kwatanta da ƙarfe na gargajiya na carbon.
Kammalawa
SA302GrB karfe farantin karfe ya zama core abu na zamani masana'antu high-zazzabi da high-matsi kayan aiki saboda da high ƙarfi, lalata juriya da kuma sauki waldi. Ma'auni na aminci, kariyar muhalli da ingancin farashi ya sa ba za a iya maye gurbinsa ba a fagen makamashin nukiliya, petrochemicals, makamashi, da dai sauransu, kuma yana haifar da haɓaka kayan aikin masana'antu zuwa mafi inganci kuma mafi aminci.
Lokacin aikawa: Juni-04-2025