1. Maitiro ekuita, kushandiswa uye maitiro anoshanda
SA302GrB is low-alloy high-simba manganese-molybdenum-nickel alloy steel plate inova yeASTM A302 yakajairwa uye yakagadzirirwa kudziya kwepamusoro-soro uye yakakwirira-kudzvanywa michina yakadai semidziyo yekumanikidza uye boilers. Hunhu hwayo hwekuita hunosanganisira:
Yakanakisa michina zvivakwa: tensile simba ≥550 MPa, goho simba ≥345 MPa, elongation ≥18%, uye kukanganisa kuoma kunosangana neASTM A20 standard.
Kushanda kwakanaka kwewelding: inotsigira manual arc welding, submerged arc welding, gasi shielded welding uye mamwe maitiro, uye preheating uye kupisa kupisa kunodiwa mushure mekuputira kudzivirira kuputika.
Kudzivirira kwekushisa kwepamusoro uye kuramba kwekuora: Inoramba yakagadzikana mukati mekushanda kwekushisa kwe -20 ℃ kusvika 450 ℃, inokodzera nharaunda dzinoparadza midhiya senge acids uye alkalis.
Huremu uye simba rakakwirira: Kuburikidza nedhizaini yakaderera dhizaini, uku ichidzikisa huremu hwechimiro, iyo yekumanikidza inotakura simba inovandudzwa uye mutengo wekugadzira michina unoderedzwa.
Mamiriro anoshanda: makiyi emidziyo muminda yepetrochemicals, magetsi emagetsi boilers, zvidyarwa zvemagetsi enyukireya, kugadzirwa kwehydropower, nezvimwe, senge mareactor, anotsinhanisa kupisa, matangi akatenderera, nyukireya reactor pressure midziyo, boiler madhiramu, nezvimwe.
2. Zvikamu zvikuru, maitiro ekushanda uye mechanical properties
Kemikari inoumbwa (kunyunguduka kuongororwa):
C (kabhoni): ≤0.25% (≤0.20% kana ukobvu ≤25mm)
Mn (manganese): 1.07% -1.62% (1.15% -1.50% apo ukobvu ≤25mm)
P (phosphorus): ≤0.035% (mamwe mazinga anoda ≤0.025%)
S (sarufa): ≤0.035% (mamwe mazinga anoda ≤0.025%)
Si (silicon): 0.13% -0.45%
Mo (molybdenum): 0.41% -0.64% (mamwe mazinga anoda 0.45% -0.60%)
Ni (nickel): 0.40% -0.70% (imwe ukobvu siyana)
Performance parameters:
Kusimba kwesimba: 550-690 MPa (80-100 ksi)
Simba rekuburitsa: ≥345 MPa (50 ksi)
Elongation: ≥15% kana geji kureba kuri 200mm, ≥18% kana geji kureba kuri 50mm
Chimiro chekurapa kwekupisa: Kuendesa mune normalizing, normalizing + tempering kana kudzora kutenderera mamiriro, normalizing kurapwa kunodiwa kana ukobvu> 50mm.
Mechanical performance yakanakira:
Chiyero chesimba repamusoro uye kuoma: Pa550-690 MPa kusimba kwesimba, ichiri kuchengetedza kureba kwe ≥18%, ichiva nechokwadi chekuti mudziyo unokwanisa kuramba brittle kutyoka.
Yakanaka zviyo chimiro: Inosangana neiyo yakanaka saizi yezviyo zvinodiwa zveiyo A20/A20M chiyero uye inovandudza yakaderera-tembiricha kukanganisa kuoma.
3. Mamiriro ekushandisa uye zvakanakira
Petrochemical industry:
Chikumbiro chekushandisa: Bhizinesi repetrochemical rinoshandisa SA302GrB simbi mahwendefa kugadzira yakakwirira-kudzvanywa reactor, anga achimhanya achienderera kwemakore mashanu pa400 ℃ uye 30 MPa asina kutsemuka kana deformation.
Zvakanakira: Kupokana kwakanyanya kune hydrogen corrosion, uye 100% ultrasonic chikanganiso chekuonekwa kwewelds inovimbisa kuchengetedzwa kwemidziyo.
Nzvimbo yekugadzira magetsi enyukireya:
Kesi yekushandisa: Iyo reactor yekumanikidza ngarava yechigadzirwa chemagetsi enyukireya inotora SA302GrB simbi ndiro ine ukobvu hwe120mm. Kuburikidza ne normalizing + kupisa kurapwa, iyo radiation kuramba inovandudzwa ne30%.
Advantage: Molybdenum yemukati ye0.45% -0.60% inhibits neutron irradiation embrittlement uye inosangana nezvinodiwa zveASME zvakatemwa.
Power station boiler munda:
Kesi yekushandisa: Iyo supercritical boiler dhiramu inotora SA302GrB simbi ndiro, inoshanda pa540 ℃ uye 25 MPa, uye hupenyu hwayo hwesevhisi hunowedzerwa kusvika kumakore makumi matatu.
Kubatsira: Kupisa kwepamusoro-nguva pfupi simba rinosvika 690 MPa, iyo iri 15% yakareruka kupfuura kabhoni simbi uye inoderedza kushandiswa kwesimba.
Nzvimbo yekugadzirwa kweHydropower:
Mhosva yekushandisa: Iyo yakakwira-kudzvanywa mvura pombi yechiteshi chemagetsi inotora SA302GrB simbi ndiro uye inopfuura mazana maviri emakumi maviri ezviuru bvunzo dzekuneta munzvimbo ye -20 ℃ kusvika 50 ℃.
Zvakanakira: Kuomarara kwetembiricha yakaderera (≥27 J pa -20 ℃) inosangana nezvinodiwa nemamiriro ekunze enzvimbo dzine makomo.
4. Kuchengetedza, kuchengetedza kwezvakatipoteredza uye kukosha kwemaindasitiri
Safety:
Yakapfuura ASTM A20 kukanganisa bvunzo (V-notch inokanganisa simba ≥34 J pa -20 ℃), kuve nechokwadi kuti njodzi yekudzika-tembiricha brittle fracture isingasviki 0.1%.
Kuomarara kwenzvimbo yekupisa-yakakanganiswa ye weld ndeye ≤350 HV kudzivirira kuputika kwehydrogen-induced.
Kuchengetedza kwezvakatipoteredza:
Iyo molybdenum ye 0.41% -0.64% inoderedza kushandiswa kwenickel uye inoderedza kuburitswa kwesimbi inorema.
Inoenderana neEU RoHS rairo uye inorambidza kushandiswa kwezvinhu zvinokuvadza senge lead nemercury.
Kukosha kweindasitiri:
Iyo inoverengera makumi maviri neshanu muzana yepasirese yekumanikidza ngarava simbi ndiro musika uye chinhu chakakosha pakugadziriswa kwesimba renyukireya uye petrochemical michina.
Inotsigira tembiricha yemhando dzakasiyana dzekushandisa kubva -20 ℃ kusvika 450 ℃, uye inovandudza mashandiro emidziyo ne15% -20% zvichienzaniswa neyakajairwa kabhoni simbi.
Mhedziso
SA302GrB simbi ndiro yave musimboti wemidziyo yemazuva ano maindasitiri epamusoro-tembiricha uye akanyanya-kudzvanywa midziyo nekuda kwesimba rayo rakawanda, kusaita ngura uye kukwenenzverwa kuri nyore. Huyero hwayo hwekuchengetedza, kuchengetedza kwezvakatipoteredza uye kuita-mutengo kunoita kuti isadzorereke mumunda wesimba renyukireya, petrochemicals, simba, nezvimwewo, uye iri kufambisa kusimudzira kwemidziyo yemaindasitiri kuenda kune imwe nzira inoshanda uye yakachengeteka.
Nguva yekutumira: Jun-04-2025