1. Izici zokusebenza, ukusetshenziswa nezimo ezisebenzayo
I-SA302GrB iyi-low-alloy high-strength manganese-molybdenum-nickel alloy steel plate okungeyezinga le-ASTM A302 futhi yakhelwe okokusebenza okunezinga lokushisa eliphezulu kanye nengcindezi ephezulu njengemikhumbi yokucindezela namabhayela. Izici zayo zokusebenza eziyinhloko zihlanganisa:
Izakhiwo ezinhle kakhulu zemishini: amandla aqinile ≥550 MPa, amandla esivuno ≥345 MPa, ubude ≥18%, nokuqina komthelela kuhlangabezana nezinga le-ASTM A20.
Ukusebenza kahle kwe-welding: isekela i-arc welding manual, i-arc welding engaphansi kwamanzi, i-gas shielded welding nezinye izinqubo, nokushisa kwangaphambili nokwelashwa kokushisa kuyadingeka ngemva kokushisela ukuvimbela imifantu.
Ukumelana nezinga lokushisa eliphezulu nokumelana nokugqwala: Ihlala izinzile ngaphakathi kwebanga lokushisa elisebenzayo elingu -20℃ kuya ku-450℃, ilungele izindawo zemidiya ezonakalisayo njengama-asidi nama-alkali.
Isisindo esincane namandla aphezulu: Ngokuklama okuphansi kwe-alloying, ngenkathi kunciphisa isisindo sesakhiwo, umthamo wokuthwala ingcindezi uyathuthukiswa futhi izindleko zokukhiqiza imishini ziyancipha.
Izimo ezisebenzayo: okokusebenza okubalulekile emikhakheni yamakhemikhali kaphethiloli, amabhoyela ezitshalo zikagesi, izimboni zamandla enuzi, ukukhiqizwa kukagesi ngamanzi, njll., njengama-reactors, izishintshisi zokushisa, amathangi ayindilinga, imikhumbi yomfutho we-nuclear reactor, izigubhu zamabhayela, njll.
2. Izingxenye eziyinhloko, imingcele yokusebenza kanye nezakhiwo zemishini
Ukwakheka kwamakhemikhali (ukuhlaziywa kokuncibilika):
C (ikhabhoni): ≤0.25% (≤0.20% uma ukujiya ≤25mm)
I-Mn (manganese): 1.07%-1.62% (1.15% -1.50% lapho ukujiya ≤25mm)
I-P (phosphorus): ≤0.035% (amanye amazinga adinga ≤0.025%)
S (sulphur): ≤0.035% (amanye amazinga adinga ≤0.025%)
I-Si (silicon): 0.13% -0.45%
I-Mo (molybdenum): 0.41% -0.64% (amanye amazinga adinga u-0.45% -0.60%)
I-Ni (nickel): 0.40% -0.70% (ububanzi obunye ukujiya)
Amapharamitha okusebenza:
Amandla e-Tensile: 550-690 MPa (80-100 ksi)
Amandla okukhiqiza: ≥345 MPa (50 ksi)
Ubude: ≥15% uma ubude begeji bungu-200mm, ≥18% uma ubude begeji bungu-50mm
Isimo sokwelashwa kokushisa: Ukulethwa kusimo esijwayelekile, esijwayelekile + sokushisa noma esilawulwayo, ukwelashwa okujwayelekile kuyadingeka lapho ukushuba> 50mm.
Izinzuzo zokusebenza kwemishini:
Ibhalansi yamandla aphezulu nokuqina: Kuma-MPa angu-550-690 amandla aqinile, isalondoloza ubude obungu-≥18%, iqinisekisa ikhono lesisetshenziswa lokumelana nokuphuka okuphukayo.
Isakhiwo sokusanhlamvu esihle: Sihlangabezana nezidingo zikasayizi wokusanhlamvu omuhle wezinga le-A20/A20M futhi sithuthukisa ukuqina komthelela wezinga lokushisa eliphansi.
3. Amacala okufaka isicelo kanye nezinzuzo
Imboni ye-Petrochemical:
Ikesi lesicelo: Ibhizinisi le-petrochemical lisebenzisa amapuleti ensimbi e-SA302GrB ukwenza ama-reactors anengcindezi ephezulu, esebenze ngokuqhubekayo iminyaka emi-5 ku-400℃ kanye nama-MPa angama-30 ngaphandle kokuqhekeka noma ukuwohloka.
Izinzuzo: Ukumelana okuhle kakhulu ne-hydrogen corrosion, futhi 100% ukutholwa kwamaphutha e-ultrasonic ama-welds kuqinisekisa ukuphepha kwemishini.
Inkambu yokuphehla amandla enuzi:
Ikesi lesicelo: Umkhumbi we-reactor yesikhungo samandla enuzi wamukela i-SA302GrB steel plate enogqinsi luka-120mm. Ngokwelashwa okujwayelekile + kokuthulisa, ukumelana nemisebe kuthuthukiswa ngama-30%.
Inzuzo: Okuqukethwe kwe-Molybdenum okungu-0.45% -0.60% kuvimbela i-neutron irradiation embrittlement futhi kuhlangabezana nezimfuneko zokucaciswa kwe-ASME.
Inkambu kabhayela wesiteshi samandla:
Ikesi lesicelo: Isigubhu sikabhayela esibucayi kakhulu samukela ipuleti lensimbi le-SA302GrB, elisebenza ku-540℃ kanye no-25 MPa, futhi impilo yalo yesevisi inwetshwa ibe iminyaka engu-30.
Inzuzo: Amandla okushisa aphezulu esikhathi esifushane afinyelela ku-690 MPa, elula ngo-15% kune-carbon steel futhi anciphisa ukusetshenziswa kwamandla.
Inkambu yokuphehla amandla kagesi:
Icala lesicelo: Ipayipi lamanzi elinengcindezi ephezulu yesiteshi sikagesi usebenzisa ipuleti lensimbi i-SA302GrB futhi liphumelele ukuhlolwa kokukhathala okungu-200,000 endaweni engu- -20 ℃ kuya ku-50 ℃.
Inzuzo: Ukuqina komthelela wezinga lokushisa eliphansi (≥27 J at -20℃) kuhlangabezana nezidingo zesimo sezulu esidlulele sezindawo ezinezintaba.
4. Ukuphepha, ukuvikelwa kwemvelo kanye nokubaluleka kwezimboni
Ukuphepha:
Kuphumelele ukuhlolwa komthelela we-ASTM A20 (amandla omthelela we-V-notch ≥34 J at -20℃), okuqinisekisa ubungozi bokuphuka kwe-brittle lokushisa eliphansi ingaphansi kuka-0.1%.
Ukuqina kwendawo ye-weld ethinteke ukushisa ≤350 HV ukuvimbela ukuqhekeka okwenziwe yi-hydrogen.
Ukuvikelwa kwemvelo:
Okuqukethwe kwe-molybdenum okungu-0.41% -0.64% kunciphisa ukusetshenziswa kwe-nickel futhi kunciphisa ukukhishwa kwensimbi esindayo.
Ithobela isiyalezo se-EU RoHS futhi ivimbela ukusetshenziswa kwezinto eziyingozi njengomthofu ne-mercury.
Ukubaluleka kwemboni:
Ibalelwa ku-25% wemakethe yamapuleti ensimbi yomkhumbi ocindezelayo emhlabeni wonke futhi iyinto ebalulekile ekusetshenzisweni kwasendaweni kwamandla enuzi kanye nemishini ye-petrochemical.
Isekela izinhlelo zokusebenza zebanga lokushisa elibanzi ukusuka ku -20 ℃ ukuya ku-450 ℃, futhi ithuthukisa ukusebenza kahle kwemishini ngo-15% -20% uma kuqhathaniswa nensimbi yensimbi yendabuko.
Isiphetho
Ipuleti lensimbi le-SA302GrB seliphenduke into esemqoka yemishini yesimanje yokushisa ephezulu yezimboni kanye nengcindezi ephezulu ngenxa yamandla alo aphezulu, ukumelana nokugqwala kanye nokushisela kalula. Ibhalansi yayo yokuphepha, ukuvikelwa kwemvelo kanye nokusebenza ngempumelelo kwezindleko kuyenza ingenakuthathelwa indawo emkhakheni wamandla enuzi, amakhemikhali ephethiloli, amandla, njll., futhi iqhubekisela phambili ukuthuthukiswa kwezinto ezisetshenziswa ezimbonini ziye endaweni esebenza kahle nephephile.
Isikhathi sokuthumela: Jun-04-2025