1. Iimpawu zokusebenza, ukusetyenziswa kunye neemeko ezifanelekileyo
I-SA302GrB yipleyiti yentsimbi ye-manganese-molybdenum-nickel alloy enamandla aphantsi ekwimigangatho ye-ASTM A302 kwaye yenzelwe izixhobo ezishushu kakhulu nezinoxinzelelo oluphezulu ezifana neebhayisekile zoxinzelelo kunye neebhoyila. Iimpawu zayo eziphambili zokusebenza ziquka:
Iimpawu ezibalaseleyo zoomatshini: amandla okutsalwa ≥550 MPa, amandla okukhupha ≥345 MPa, ukunwebeka ≥18%, kunye nokuqina kwempembelelo kuhambelana nomgangatho we-ASTM A20.
Ukusebenza kakuhle kokuwelda: kuxhasa ukuwelda kwe-arc ngesandla, ukuwelda kwe-arc engaphantsi komhlaba, ukuwelda okukhuselwe yigesi kunye nezinye iinkqubo, kwaye kufuneka ukufudumeza kwangaphambili kunye nonyango lobushushu emva kokuwelda ukuthintela ukuqhekeka.
Ukumelana nobushushu obuphezulu kunye nokumelana nokugqwala: Ihlala izinzile kuluhlu lobushushu bokusebenza oluqala kwi -20℃ ukuya kwi-450℃, ifanelekile kwiindawo zemidiya ezigqwalisayo ezifana nee-asidi kunye ne-alkalis.
Ilula kwaye inamandla aphezulu: Ngokusebenzisa uyilo oluphantsi lokudibanisa, ngelixa kunciphisa ubunzima besakhiwo, amandla okuthwala uxinzelelo ayaphucuka kwaye iindleko zokuvelisa izixhobo ziyancitshiswa.
Iimeko ezifanelekileyo: izixhobo eziphambili kwicandelo leekhemikhali zepetroli, iibhoyila zezityalo zamandla, izityalo zamandla enyukliya, ukuvelisa umbane ngamanzi, njl.njl., ezinje ngee-reactors, ii-heat exchangers, iitanki ezingqukuva, imikhumbi yoxinzelelo lwe-reactor yenyukliya, ii-boiler drums, njl.njl.
2. Izinto eziphambili, iiparameter zokusebenza kunye neempawu zoomatshini
Ukwakheka kweekhemikhali (uhlalutyo lokunyibilika):
I-C (ikhabhoni): ≤0.25% (≤0.20% xa ubukhulu ≤25mm)
I-Mn (i-manganese): 1.07%-1.62% (1.15%-1.50% xa ubukhulu ≤25mm)
I-P (i-phosphorus): ≤0.035% (eminye imigangatho ifuna ≤0.025%)
I-S (isulfure): ≤0.035% (eminye imigangatho ifuna ≤0.025%)
I-Si (i-silicon): 0.13%-0.45%
I-Mo (molybdenum): 0.41%-0.64% (eminye imigangatho ifuna i-0.45%-0.60%)
I-Ni (i-nickel): 0.40%-0.70% (uluhlu oluthile lobukhulu)
Iiparameter zokusebenza:
Amandla okutsalwa: 550-690 MPa (80-100 ksi)
Amandla okuvelisa: ≥345 MPa (50 ksi)
Ukwandiswa: ≥15% xa ubude begeyiji buyi-200mm, ≥18% xa ubude begeyiji buyi-50mm
Imeko yonyango lobushushu: Ukuhanjiswa kwimeko yokulungelelanisa, yokulungelelanisa + yokulinganisa okanye yokulawula ukuqengqeleka, unyango lokulungelelanisa luyafuneka xa ubukhulu bungaphezulu kwama-50mm.
Iingenelo zokusebenza koomatshini:
Ukulinganisela amandla aphezulu kunye nokuqina: Xa inamandla okutsalwa angama-550-690 MPa, isagcina ubude obuyi-≥18%, okuqinisekisa ukuba isixhobo siyakwazi ukumelana nokuqhekeka okubuthathaka.
Ulwakhiwo lweenkozo ezincinci: Ziyahlangabezana neemfuno zobukhulu beenkozo ezincinci zomgangatho we-A20/A20M kwaye ziphucula ukuqina kwempembelelo kubushushu obuphantsi.
3. Amatyala esicelo kunye neenzuzo
Ishishini leekhemikhali:
Imeko yesicelo: Ishishini le-petrochemical lisebenzisa iipleyiti zentsimbi ze-SA302GrB ukuvelisa ii-reactors ezinoxinzelelo oluphezulu, ebezisebenza ngokuqhubekayo kangangeminyaka emi-5 kwi-400℃ kunye ne-30 MPa ngaphandle kokuqhekeka okanye ukuguquguquka.
Iingenelo: Ukumelana kakuhle nokugqwala kwehydrogen, kunye nokufunyanwa kweziphene ze-ultrasonic eziyi-100% kuqinisekisa ukhuseleko lwezixhobo.
Intsimi yesityalo samandla enyukliya:
Ityala lesicelo: Isitya soxinzelelo se-reactor sesityalo samandla enyukliya sisebenzisa ipleyiti yentsimbi ye-SA302GrB enobukhulu obuyi-120mm. Ngonyango lokulungisa + ukufudumala, ukumelana nemitha kuphucuka nge-30%.
Inzuzo: Umxholo weMolybdenum oyi-0.45%-0.60% uthintela ukubhitya kwe-neutron irradiation kwaye uhlangabezana neemfuno ze-ASME specifications.
Intsimi yebhoyila yesitishi samandla:
Imeko yokusetyenziswa: Idrama yebhoyila ebaluleke kakhulu isebenzisa ipleyiti yentsimbi ye-SA302GrB, esebenza kwi-540℃ kunye ne-25 MPa, kwaye ubomi bayo benkonzo buyandiswa ukuya kwiminyaka engama-30.
Inzuzo: Amandla exesha elifutshane obushushu obuphezulu afikelela kwi-690 MPa, ekhaphukhaphu nge-15% kune-carbon steel kwaye inciphisa ukusetyenziswa kwamandla.
Intsimi yokuvelisa umbane ngamanzi:
Imeko yokusetyenziswa: Umbhobho wamanzi oxinzelelo oluphezulu wesikhululo samandla ombane usebenzisa ipleyiti yentsimbi ye-SA302GrB kwaye uphumelele iimvavanyo zokudinwa ezingama-200,000 kwindawo ephakathi kwe--20℃ ukuya kwi-50℃.
Inzuzo: Ukuqina kwempembelelo kubushushu obuphantsi (≥27 J kwi -20℃) kuyahlangabezana neemfuno zemozulu ezigqithisileyo kwiindawo zeentaba.
4. Ukhuseleko, ukhuseleko lokusingqongileyo kunye nokubaluleka kwemizi-mveliso
Ukhuseleko:
Uphumelele uvavanyo lwempembelelo lwe-ASTM A20 (amandla empembelelo ye-V-notch ≥34 J kwi -20℃), ukuqinisekisa ukuba umngcipheko wokuqhekeka kwe-brittle kwiqondo lobushushu eliphantsi ungaphantsi kwe-0.1%.
Ubunzima bendawo echaphazeleka bubushushu ye-weld yi-≤350 HV ukuthintela ukuqhekeka okubangelwa yi-hydrogen.
Ukhuseleko lokusingqongileyo:
Umxholo we-molybdenum oyi-0.41%-0.64% unciphisa ukusetyenziswa kwe-nickel kwaye unciphisa ukukhutshwa kwesinyithi esinzima.
Iyahambelana nomyalelo we-EU RoHS kwaye iyakwalela ukusetyenziswa kwezinto ezinobungozi ezifana ne-lead kunye ne-mercury.
Ukubaluleka kwemizi-mveliso:
Ibandakanya i-25% yemarike yehlabathi yepleyiti yesinyithi yeenqanawa zoxinzelelo kwaye iyinto ebalulekileyo ekufumanekeni kwezixhobo zamandla enyukliya kunye ne-petrochemical.
Ixhasa usetyenziso olubanzi lobushushu ukusuka kwi -20℃ ukuya kwi-450℃, kwaye iphucula ukusebenza kakuhle kwezixhobo nge-15%-20% xa kuthelekiswa nentsimbi yekhabhoni yendabuko.
Isiphelo
Ipleyiti yentsimbi ye-SA302GrB iye yaba yinto ephambili kwizixhobo zanamhlanje zoshishino ezisebenzisa ubushushu obuphezulu kunye noxinzelelo oluphezulu ngenxa yamandla ayo aphezulu, ukumelana nokugqwala kunye nokuwelda okulula. Ukulinganisela kwayo ukhuseleko, ukhuseleko lokusingqongileyo kunye nokusebenza kakuhle kweendleko kwenza ukuba ingathathelwa indawo kwicandelo lamandla enyukliya, iikhemikhali zepetroli, amandla, njl.njl., kwaye iqhuba uphuhliso lwezixhobo zoshishino ukuya kwicala elisebenzayo nelikhuselekileyo.
Ixesha lokuthumela: Juni-04-2025