SA387 Qib 5 Chav Kawm 2 Rau Siab Ntsig Ntsig Phaj

Cov Khoom Siv Neeg Kho Tshuab thiab Cov Ntawv Sib Tw

Sa 387 Qib 5 Chav Kawm 2 yog paub rau nws cov kev ua tau zoo nyob rau hauv huab kev mob, ua rau nws haum rauSiab Hluathiab cov ntawv thov kub-kev kub siab . Cov pob ua haujlwm tseem ceeb muaj thiab sau cov phiaj xwm sib xyaw ua ke yog cov phiaj xwm zoo li qubAlloy SteelDaim hlau siv nyob rau hauv weldable carbon hlau siab cov ntsha ntawm high kub . Tus Alloy Steel muaj cov khoom siv chromium thiab molybdenum, uas muab nws cov khoom siv hauv qab no

Lub zog tensile

Yam tsawg kawg: 415 MPa (60,000 psi)

Qhov siab kawg: 585 MPa (85,000 psi)

Elongation

Yam tsawg kawg: 18% hauv 50 hli (2 ntiv)

Yam tsawg kawg: 22% hauv 200 hli (8 ntiv)

Tshaj tawm lub zog yam tsawg kawg:205 MPa (30, 000 psi)

Kev nyuajHauv thaj tsam ntawm 130-180 hb (brinell hardness)

Kev sib xyaw ntawm SA 387 qib 5 chav kawm 2 alloy steel phaj

Qhov zoo tshaj plaws Chrome Molybdenum alloy steel phaj npaj rau kev siv cov khoom siv kub ntawm 387 2}} Lub hom tseem ceeb thiab lawv feem ntau yog:

Cov pa roj carbon (c): 0.15% Max

Manganese (MN): 0.60-1.00%

Phosphorus (p): 0.025% max

Sulphur (s): 0.025% Max

Silicon (si): 0.50% max

Chromium (CR): 4.00-6.00%

Molybdenum (mo): 0.45-0.65%

Q1:Dab tsi creep tsis tuaj yeem xav tau ntawm 600-650 degree?

Cov ntaub ntawv nkag:

Lub zog sib xyaw:85 MPa ntawm 600℃/ 100, 000 hrs

Pub Tau Kev Nyuaj Siab:34 MPA ntawm 650℃(ASME II-D)

ELECTRAVES:

Nplua nplua yooj yim martensiteNrog MX carbonivrides

Q2:Yuav ua li cas cov paib tuab (txog 250 hli) zoo-tswj?

Txheej txheem tsim khoom:

Ua kom muaj dej tso dej nrawm(centralline txias tus nqi ntau dua los yog sib npaug rau 20℃/ s)

Tempering:{{0705-760℃× 1hr / 25mm

Kuaj xyuas raws tu qauv:

100% UT ib -578 chav kawm 2(0.8mm fbh rhiab siab)

Z-kev taw qhia ψ Ntau dua los yog sib npaug rau 35%(Astm A770)

Q3:Dab tsi vuam cov txheej txheem tseem ceeb heev rau kev thov ua kom rov qab?

Vuam Surcolol:

Preheat:{{0 {}}℃(rau txhua qhov thicknesses)

Cov tub lim hlau:Aws A5.28 E 505-15 (5Cr -0.5 mo)

Interpass temp:Tsawg dua los yog sib npaug rau 300 degree

Kev kho mob weld:

Pwhal:{{0705-760℃× 1hr / 25mm

Hardness txwv:Tsawg dua los yog sib npaug rau 241 HB (ASME VIII)

Q4:Thaum twg yuav tsum kawm 2 teev nyob hauv chav kawm 1?

Daim ntawv thov tseem ceeb:

Hydrogen Reforming Headers(Cyclic thermal kev ntxhov siab)

High-kub reactorsxav tau fracture tod

Cim npe nrov: SA387 Qib 5 rau cov hlab ntsha siab 2 rau cov nkoj siab siab phaj, Tuam Tshoj SA387 Qib 5 rau siab lub nkoj phaj tsim, cov chaw muag khoom, Hoobkas