1. Litšobotsi tsa ts'ebetso, ts'ebeliso le maemo a sebetsang
SA302GrB ke poleiti ea tšepe e nang le matla a tlaase a manganese-molybdenum-nickel alloy alloy ea boleng ba ASTM A302 'me e etselitsoe lisebelisoa tse phahameng tsa mocheso le tse phahameng tse kang likepe tsa khatello le li-boilers. Litšobotsi tsa eona tsa mantlha tsa ts'ebetso li kenyelletsa:
Thepa e ntle haholo ea mochini: matla a tensile ≥550 MPa, matla a tlhahiso ≥345 MPa, bolelele ≥18%, 'me boima ba tšusumetso bo kopana le maemo a ASTM A20.
Ts'ebetso e ntle ea welding: e ts'ehetsa welding ea li-arc, welding e ka tlas'a metsi, welding e sirelelitsoeng ka khase le lits'ebetso tse ling, 'me ho futhumatsa le ho futhumatsa mocheso hoa hlokahala kamora ho cheselletsa ho thibela mapetsong.
Ho hanyetsa mocheso o phahameng le ho hanyetsa kutu: E lula e tsitsitse ka har'a mocheso oa mocheso oa -20 ℃ ho ea ho 450 ℃, o loketse libaka tse senyang tsa mecha ea litaba tse kang li-acids le alkalis.
Matla a bobebe le a phahameng: Ka moralo o tlase oa alloying, ha o ntse o fokotsa boima ba sebopeho, matla a ho jara khatello a ntlafatsoa mme litšenyehelo tsa tlhahiso ea lisebelisoa li fokotsehile.
Maemo a sebetsang: lisebelisoa tsa bohlokoa masimong a lik'hemik'hale tsa petrole, liboiler tsa feme ea matla, limela tsa matla a nyutlelie, tlhahiso ea matla a metsi, joalo-joalo, joalo ka li-reactors, li-heaters tsa mocheso, litanka tse chitja, likepe tsa khatello ea nyutlelie, meropa ea boiler, jj.
2. Likarolo tse ka sehloohong, litekanyetso tsa ts'ebetso le thepa ea mechine
Sebopeho sa lik'hemik'hale (tlhahlobo ea ho qhibiliha):
C (khabone): ≤0.25% (≤0.20% ha botenya ≤25mm)
Mn (manganese): 1.07% -1.62% (1.15% -1.50% ha botenya ≤25mm)
P (phosphorus): ≤0.035% (litekanyetso tse ling li hloka ≤0.025%)
S (sebabole): ≤0.035% (litekanyetso tse ling li hloka ≤0.025%)
Si (silicon): 0.13% -0.45%
Mo (molybdenum): 0.41% -0.64% (litekanyetso tse ling li hloka 0.45% -0.60%)
Ni (nickel): 0.40% -0.70% (botenya bo bong bo fapaneng)
Litekanyetso tsa ts'ebetso:
Matla a matla: 550-690 MPa (80-100 ksi)
Matla a tlhahiso: ≥345 MPa (50 ksi)
Elongation: ≥15% ha bolelele ba gauge e le 200mm, ≥18% ha bolelele ba gauge e le 50mm
Boemo ba phekolo ea mocheso: Ho fana ka boemo bo tloaelehileng, ho tloaeleha + kapa ho laola boemo bo laoloang, phekolo e tloaelehileng e hlokahalang ha botenya> 50mm.
Melemo ea ts'ebetso ea mochini:
Ho leka-lekana ha matla a phahameng le ho tiea: Ho 550-690 MPa matla a ho tiea, e ntse e boloka bolelele ba ≥18%, ho netefatsa bokhoni ba thepa ea ho hanyetsa ho robeha ha brittle.
Sebopeho se setle sa lijo-thollo: E kopana le litlhoko tsa boholo bo botle ba lijo-thollo tsa maemo a A20/A20M 'me e ntlafatsa ho ba le tšusumetso e matla ea mocheso o tlase.
3. Linyeoe tsa kopo le melemo
Indasteri ea peterole:
Nyeoe ea kopo: Khoebo ea petrochemical e sebelisa lipoleiti tsa tšepe tsa SA302GrB ho etsa li-reactors tse nang le khatello e phahameng, tse 'nileng tsa sebetsa ka lilemo tse 5 ho 400 ℃ le 30 MPa ntle le mapetsong kapa deformation.
Melemo: Ho hanyetsa ho hoholo ha hydrogen corrosion, le 100% ho lemoha liphoso tsa ultrasonic tsa li-welds ho netefatsa polokeho ea lisebelisoa.
Sebaka sa setsi sa matla a nyutlelie:
Nyeoe ea kopo: Sekepe sa khatello ea reactor ea polante ea matla a nyutlelie se nka SA302GrB poleiti ea tšepe e nang le botenya ba 120mm. Ka kalafo e tloaelehileng + ea mocheso, khanyetso ea radiation e ntlafatsoa ka 30%.
Molemo: Likahare tsa Molybdenum tsa 0.45% -0.60% li thibela mahlaseli a neutron embrittlement mme li finyella litlhoko tsa litlhaloso tsa ASME.
Sebaka sa boiler sa seteishene sa motlakase:
Nyeoe ea kopo: Moqomo o matla oa boiler o amohela poleiti ea tšepe ea SA302GrB, e sebetsang ho 540 ℃ le 25 MPa, 'me bophelo ba eona ba ts'ebeletso bo eketsoa ho lilemo tse 30.
Molemo: Mocheso o phahameng oa nako e khutšoanyane matla a fihla ho 690 MPa, e leng 15% e bobebe ho feta carbon steel mme e fokotsa tšebeliso ea matla.
Sebaka sa ho fehla motlakase oa metsi:
Nyeoe ea kopo: Peipi ea metsi e nang le khatello e phahameng ea seteishene sa matla a metsi e amohela poleiti ea tšepe ea SA302GrB mme e feta liteko tsa mokhathala tse 200,000 tikolohong ea -20 ℃ ho isa ho 50 ℃.
Monyetla: Matla a amang mocheso o tlase (≥27 J at -20℃) a kopana le litlhoko tse feteletseng tsa boemo ba leholimo libakeng tse lithaba.
4. Tšireletseho, tšireletso ea tikoloho le bohlokoa ba indasteri
Tšireletseho:
E fetisitse tlhahlobo ea phello ea ASTM A20 (matla a phello ea V-notch ≥34 J ho -20℃), ho netefatsa hore kotsi ea ho robeha ha brittle ea mocheso o tlase e ka tlase ho 0.1%.
Boima ba sebaka se amehileng ke mocheso oa weld ke ≤350 HV ho thibela ho phunyeha ho bakoang ke hydrogen.
Tšireletso ea tikoloho:
Likahare tsa molybdenum tsa 0.41% -0.64% li fokotsa tšebeliso ea nickel le ho fokotsa tlhahiso ea tšepe e boima.
E lumellana le taelo ea RoHS ea EU 'me e thibela tšebeliso ea lintho tse kotsi tse kang lead le mercury.
Bohlokoa ba indasteri:
E ikarabella bakeng sa 25% ea 'maraka oa lefats'e oa lijana tsa tšepe tsa khatello ea likepe 'me ke thepa ea bohlokoa bakeng sa ho kenya matla a nyutlelie le lisebelisoa tsa petrochemical.
E ts'ehetsa lits'ebetso tse fapaneng tsa mocheso ho tloha ho -20 ℃ ho isa ho 450 ℃, 'me e ntlafatsa ts'ebetso ea lisebelisoa tse sebetsang ka 15% -20% ha e bapisoa le tšepe ea khale ea carbon.
Qetello
Letlapa la tšepe la SA302GrB e se e le thepa ea mantlha ea thepa ea sejoale-joale ea mocheso o phahameng oa indasteri le khatello e phahameng ka lebaka la matla a eona a phahameng, ho hanyetsa kutu le ho chesehela habonolo. Tekatekanyo ya yona ya polokego, tšhireletšo ya tikologo le go šomiša ditshenyegelo go e dira gore e se ke ya fetišetšwa mafapheng a matla a nyutlelia, dikhemikhale tša petrole, enetši, bjalobjalo, gomme e tšwetša pele tlhabollo ya didirišwa tša diintasteri go lebiša tsela yeo e šomago gabotse le yeo e bolokegilego.
Nako ea poso: Jun-04-2025