SA387 qib 11 sib npaug li cas?
Qhov sib npaug ncaj qha thiab tseem ceeb tshaj plaws rau SA387 Qib 11 (tus qauv ASME) yog nws tus lej UNS thiab nws cov neeg sib tw thoob ntiaj teb ze tshaj plaws. Qhov sib npaug ib txwm xav tias qhov normalized thiab tempered (N&T) mob tshwj tsis yog "Class 1" tau teev tseg.
| Standard / cheeb tsam | Kev Cai Sib Tw | Ntsiab Lus |
|---|---|---|
| ASME(USA) | SA387 Qib 11 | Qhov yuav tsum tau ua raws cai tshwj xeeb rau kev tsim cov hlab ntsha hauv North America. |
| UNS(USA) | K11789 | Cov khoom siv tus lej. |
| EN / DIN(Tebchaws Europe) | 13CrMo4-5 (1.7335) | Qhov no yog qhov ze tshaj plaws thiab feem ntau hais txog European sib npaug. Cov muaj pes tsawg leeg (1.0-1.5% Cr, 0.5-0.7% Mo) thiab daim ntawv thov yuav luag zoo tib yam. |
| JIS(Nyiv) | SWV 410 | Japanese siab nkoj steel qauv. |
| GB(Tuam Tshoj) | 15 CrMoR | Thawj Suav sib npaug siab lub nkoj phaj steel. Tus "R" txhais tau hais tias "pawg 器" (container / nkoj). |
| Lub npe Alloy | 1¼Cr-½Mo lossis 1.25Cr-0.5Mo | Kev lag luam thoob ntiaj teb shorthand raws li nws cov nominal chromium thiab molybdenum cov ntsiab lus. |
Cov ntsiab lus tseem ceeb rau kev sib npaug:
SA-387 vs. A-387: "SA387" yog ASME BPVC Tshooj II tsim, implying cov khoom ua tau raws li kev tsim khoom ntxiv thiab cov kev cai zoo rau kev tsim qauv. "A387" yog lub hauv paus ASTM khoom specification. Hauv kev xyaum, lawv tau siv sib hloov, tab sis rau lub nkoj code, SA387 yog qhov yuav tsum tau yuav.
Qhov xwm txheej yog qhov tseem ceeb (Class 1 vs. Class 2):
Qib 11 Chav Kawm 2 yog nkag rau hauv cov xwm txheej zoo li qub thiab Tempered (muaj zog dua). Feem ntau qhov sib npaug thoob ntiaj teb (xws li 13CrMo4-5) tau ua raws li qhov xwm txheej no.
Qib 11 Chav Kawm 1 tau muab nkag rau hauv cov xwm txheej Annealed (softer, ntau formable). Qhov no tsis tshua muaj tshwm sim thiab xav tau kev txiav txim tshwj xeeb.
Tsis yog qhov sib npaug ncaj qha rau AISI 4130: Thaum lawv cov chemistry zoo sib xws, lawv tsis hloov pauv. A387 Gr.11 yog cov khoom lag luam phaj rau cov hlab ntsha siab uas muaj qhov tshwj xeeb tsis zoo thiab cov kev xav tau zoo. AISI 4130 yog ib qho dav dav -lub hom phiaj cov qauv / bar alloy nrog cov khoom sib txawv thiab kev sim.
Hauv cov ntsiab lus
rau ntiaj teb engineering thiab kev yuav khoom, qhov sib npaug tseem ceeb tshaj plaws yog:
SA387 Qib 11 (ASME Code)
13CrMo4-5 (EN/DIN - Europe)
15CrMoR (GB - Suav teb))
Nco ntsoov qhia cov chav kawm uas xav tau (1 lossis 2) thiab paub meej tias cov khoom sib npaug ua tau raws li qhov tsim nyog kho cua sov thiab kuaj rau koj daim ntawv thov.
1. Cov tshuaj muaj pes tsawg leeg ntawm A387 Qib 5 txawv li qib 11 lossis qib 12 li cas?
A387 Qib 5 yog ntau dua -chromium alloy steel, feem ntau muaj nyob ib ncig ntawm 5% chromium thiab 0.5% molybdenum. Qhov no tso nws nyob nruab nrab ntawm Qib 11 ntau dua (~ 1.25% Cr) thiab Qib 22 (~ 2.25% Cr), muab nws qhov zoo sib xws ntawm oxidation tsis kam thiab nce siab -qhov kub thiab txias piv rau qis dua- qib alloy, thaum muaj peev xwm ua tau tus nqi ntau dua -{3} kev pab cuam ntau dua li steel.
2. Dab tsi yog Qhov Kev Pab Cuam Tshaj Plaws Hauv Tsev Kawm Ntawv Qib Siab 2?
Lub hom phiaj tseem ceeb ntawm A387 Qib 5 Chav Kawm 2 yog nyob rau hauv nws qhov kev tiv thaiv oxidation zoo dua thiab muaj zog tuav ntau dua ntawm qhov kub thiab txias feem ntau yog li ntawm 540℃mus rau 600℃(1000℃F txog 1112℃F), tshaj qhov muaj peev xwm ntawm Qib 11 lossis 12. Qhov no ua rau nws tsim nyog rau cov khoom siv hauv catalytic furnacetro lwm qhov kev pabcuam hnyav, kev hloov pauv ntawm cov khoom siv hluav taws xob, scaling thiab creep yog kev txhawj xeeb tseem ceeb.
3. Dab tsi yog qhov tseem ceeb ntawm Vuam thiab Fabrication Considerations rau A387 Gr.5 Cl.2?
Vuam A387 Qib 5 Chav Kawm 2 yuav tsum muaj cov txheej txheem nruj vim nws cov ntsiab lus alloy siab dua. Nws xav tau qhov yuav tsum tau ua kom sov (feem ntau yog 175-250℃/ 350-480℃F) thiab nruj tswj qhov kub thiab txias los tiv thaiv qhov nyuaj, tawg-sensitive microstructures. Tsis tas li ntawd, qhov yuav tsum tau ua tom qab Weld Heat Treatment (PWHT) nyob rau hauv thaj tsam ntawm 675-730℃(1250-1350℃F) yog qhov tseem ceeb kom npau taws rau thaj tsam weld, txo kev ntxhov siab, thiab rov ua kom corrosion.
4. Dab tsi yog Tus Txheej Txheem Kev Kho Hniav Kub Rau A387 Qib 5 Chav Kawm 2 Phaj?
A387 Qib 5 Chav Kawm 2 daim hlau tau muab rau hauv cov xwm txheej zoo li qub thiab Tempered. Normalizing muaj cua sov saum toj no qhov kev hloov pauv thiab cua txias kom ua kom zoo dua cov qauv nplej, ua raws li tempering ntawm sub- kub tseem ceeb kom ua tiav qhov kev pom zoo ua ke ntawm lub zog thiab cov khoom siv tau teev tseg hauv tus qauv (feem ntau yog qhov tsawg kawg nkaus lub zog ntawm 310 MPa / 45 ksi).
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
