1. Njirimara arụmọrụ, ojiji na ọnọdụ ndapụta
SA302GrB bụ obere alloy dị elu manganese-molybdenum-nickel alloy steel plate nke bụ nke ọkọlọtọ ASTM A302 ma emebere ya maka akụrụngwa okpomọkụ na oke nrụgide dị ka arịa nrụgide na igwe ọkụ. Isi njirimara arụmọrụ ya gụnyere:
Ngwongwo arụ ọrụ dị mma: ike tensile ≥550 MPa, ike ≥345 MPa, elongation ≥18%, na mmetụta siri ike na-ezute ọkọlọtọ ASTM A20.
Ọrụ ịgbado ọkụ dị mma: na-akwado ịgbado ọkụ akwụkwọ ntuziaka, ịgbado ọkụ arc mmiri mmiri, ịgbado ọkụ gas na usoro ndị ọzọ, yana preheating na ọgwụgwọ okpomọkụ ka achọrọ mgbe ịgbado ọkụ iji gbochie mgbawa.
Igwe ọkụ dị elu na nguzogide corrosion: na-anọgide na-eguzosi ike n'ime oke okpomọkụ na-arụ ọrụ nke -20 ℃ ruo 450 ℃, dabara maka gburugburu mgbasa ozi corrosive dị ka acids na alkalis.
Dị arọ na ike dị elu: Site n'ichepụta alloying dị ala, ebe ị na-ebelata ịdị arọ nke ihe owuwu ahụ, a na-eme ka nrụgide nrụgide dịkwuo mma ma na-ebelata ọnụ ahịa mmepụta ngwá ọrụ.
Ọdabara ọnọdụ: isi akụrụngwa n'ọhịa nke petrochemicals, ike osisi ji esi mmiri ọkụ, nuklia ike osisi, hydropower ọgbọ, wdg, dị ka reactors, okpomọkụ Exchangers, sppherical tankị, nuclear reactor arịa ụgbọ mmiri, ji esi mmiri ọkụ, wdg.
2. Isi ihe, paramita arụmọrụ na akụrụngwa akụrụngwa
Ngwakọta kemịkalụ (nyocha agbaze):
C (carbon): ≤0.25% (≤0.20% mgbe ọkpụrụkpụ ≤25mm)
Mn (manganese): 1.07% -1.62% (1.15% -1.50% mgbe ọkpụrụkpụ ≤25mm)
P (phosphorus): ≤0.035% (ụkpụrụ ụfọdụ chọrọ ≤0.025%)
S (sulfur): ≤0.035% (ụkpụrụ ụfọdụ chọrọ ≤0.025%)
Si (silicon): 0.13% -0.45%
Mo (molybdenum): 0.41%-0.64% (ụkpụrụ ụfọdụ chọrọ 0.45%-0.60%)
Ni (nickel): 0.40%-0.70% (ụfọdụ oke oke)
Parampat arụmọrụ:
Ike ntanye: 550-690 MPa (80-100 ksi)
Ike mpụta: ≥345 MPa (50 ksi)
Elongation: ≥15% mgbe nlele ogologo bụ 200mm, ≥18% mgbe nlele ogologo bụ 50mm
Ọnọdụ ọgwụgwọ okpomọkụ: Nnyefe na normalizing, normalizing + tempering ma ọ bụ ọnọdụ mpịakọta a na-achịkwa, a chọrọ ọgwụgwọ normalize mgbe ọkpụrụkpụ> 50mm.
Uru ịrụ ọrụ igwe:
Ntụle nke ike dị elu na ike siri ike: Na 550-690 MPa ike nkwụsịtụ, ọ ka na-ejigide elongation nke ≥18%, na-eme ka ikike ngwá ọrụ nwee ike iguzogide mgbawa.
Ọdịdị ọka dị mma: na-ezute ezigbo nha nha ọka chọrọ nke ọkọlọtọ A20/A20M ma na-eme ka mmetụta siri ike dị ala.
3. Ngwa ngwa na uru
Ụlọ ọrụ Petrochemical:
Ngwa ikpe: A petrochemical Enterprise na-eji SA302GrB ígwè efere rụpụta elu-nrụgide reactors, nke a na-aga n'ihu ruo 5 afọ na 400 ℃ na 30 MPa na-enweghị cracks ma ọ bụ deformation.
Uru: Nguzogide dị oke mma na corrosion hydrogen, yana nchọpụta 100% ultrasonic flaw nke welds na-eme ka nchekwa akụrụngwa.
Ogige ụlọ ọrụ ike nuklia:
Ngwa ikpe: The reactor mgbali arịa nke nuklia ike na-anabata SA302GrB ígwè efere na a ọkpụrụkpụ nke 120mm. Site na normalizing + tempering ọgwụgwọ, a na-emeziwanye nguzogide radieshon site na 30%.
Uru: Ọdịnaya Molybdenum nke 0.45% -0.60% na-egbochi mgbaka ikuku neutron ma mezuo ihe achọrọ nke nkọwa ASME.
Oghere ebe ọkụ ọkụ:
Ngwa ikpe: A supercritical ji esi mmiri ọkụ drum adopts SA302GrB ígwè efere, nke na-arụ ọrụ na 540 ℃ na 25 MPa, na ya ọrụ ndụ na-agbatị 30 afọ.
Uru: Ike dị mkpụmkpụ dị elu na-erute 690 MPa, nke dị 15% dị ọkụ karịa carbon steel ma belata oriri ike.
Ebe nrụpụta ike mmiri:
Ngwa ikpe: The elu-nrụgide mmiri ọkpọkọ nke a hydropower ọdụ adopts SA302GrB ígwè efere na-agafe 200,000 ike ọgwụgwụ ule na gburugburu -20 ℃ ka 50 ℃.
Uru: Mmetụta siri ike dị ala (≥27 J na -20 ℃) na-ezute oke ihu igwe chọrọ nke mpaghara ugwu.
4. Nchekwa, nchekwa gburugburu ebe obibi na mkpa ụlọ ọrụ
Nchekwa:
Gafere ASTM A20 mmetụta ule (V-notch mmetụta ike ≥34 J na -20℃), na-ahụ na ihe ize ndụ nke obere okpomọkụ kenkuwa mgbaji erughị 0.1%.
Isi ike nke mpaghara ikpo ọkụ na-ekpo ọkụ nke weld bụ ≤350 HV iji gbochie mgbawa nke hydrogen.
Nchedo gburugburu ebe obibi:
Ọdịnaya molybdenum nke 0.41%-0.64% na-ebelata ojiji nke nickel ma na-ebelata ihe ọkụkụ dị arọ.
Na-agbaso ntuziaka EU RoHS ma machibido iji ihe na-emerụ ahụ dị ka lead na mercury.
Mkpa ụlọ ọrụ:
Ọ bụ ihe dị ka 25% nke ahịa ihe nrụpụta ụgbọ mmiri nchara zuru ụwa ọnụ ma bụrụ isi ihe maka nhazi nke ike nuklia na akụrụngwa petrochemical.
Na-akwado obosara okpomọkụ nso ngwa si -20 ℃ ka 450 ℃, na mma akụrụngwa arụ ọrụ arụmọrụ site 15% -20% tụnyere omenala carbon ígwè.
Mmechi
SA302GrB ígwè efere aghọwo isi ihe nke oge a ulo oru elu-okpomọkụ na elu-nrụgide akụrụngwa ruru ya elu ike, corrosion iguzogide na mfe ịgbado ọkụ. Ntụle nke nchekwa ya, nchekwa gburugburu ebe obibi na ọnụ ahịa bara uru na-eme ka ọ bụrụ nke a na-apụghị dochie anya na ike nuklia, petrochemicals, ume, wdg, na ọ na-eme ka mmepe nke ngwá ọrụ mmepụta ihe na-aga n'ihu na-arụ ọrụ nke ọma na nke dị nchebe karị.
Oge nzipu: Jun-04-2025