ASTM A537 Chav Kawm 1 yog dab tsi?
ASTM A537 Qib 1 Carbon Steel thiab Carbon Steel Phaj thiab Carbon Steel Sheetyog Engineered los siv rau hauv cov ntawv thov siab Vessel. Cov khoom siv yog cov hlau zoo li qub thiab Alloy Steel uas tau kho cov cua sov thiab ua rau muaj txiaj ntsig zoo dua thiab muaj zog tensile ntau dua li cov qauv ASTM A516 ntau dua.
ASTM A537 Chav Kawm 1 yog cov khoom siv tshwj xeeb rau cov cua sov- kho, carbon-manganese-silicon steel daim hlau npaj siv rau hauv fusion-welded siab hlab ntsha thiab kev siv cov qauv. Txhawm rau kom ua tiav nws cov khoom siv kho tshuab tshwj xeeb, cov khoom siv hauv chav kawm 1 yuav tsum tau txais anormalizationCov txheej txheem kho cua sov, uas suav nrog cua sov cov hlau mus rau qhov kub thiab txias tshaj nws qhov tseem ceeb thiab tom qab ntawd txias nws hauv huab cua. Cov txheej txheem no ua kom zoo dua cov qauv nplej, ua rau cov khoom siv uas muaj qhov sib npaug ntawm atmospheric corrosion resistance, siab yield zog, thiab zoo heev notch toughness ntawm qis kub piv rau cov qauv carbon steel daim hlau zoo li ASTM A516.
Cov yam ntxwv tseem ceeb
Kev kho cua sov:Ua nruj me ntsis kom ntseeg tau tias qhov zoo sib xws -grained microstructure.
Txhim kho toughness:Tsim tshwj xeeb tsim kom muaj kev ncaj ncees nyob rau hauv qis - qhov kub thiab txias ib puag ncig.
Weldability:Cov pa roj carbon ntau-manganese piv muab qhov zoo tshaj plaws fusion vuam yam ntxwv rau hnyav- lub luag haujlwm ntawm lub nkoj tsim.
Ductility:Tuav cov feem pua elongation siab (feem ntau 18% -22%), tso cai rau kev txhim kho kev tsim thiab shaping.
Qib Qib
ASTM A537 Cov Lus Qhia:Tus qauv tseem ceeb rau cov cua sov- kho carbon-manganese- silicon steel.
Chav Kawm 1:Qhia qhovLi qubkev xa khoom (qis zog qis tshaj hauv tsev neeg A537).
Sib piv (Class 1 vs. Class 2)
Thawj qhov sib txawv yog nyob rau hauv kev kho cua sov thiab ua rau lub zog:
Lub zog:Chav Kawm 2 (Quenched & Tempered) muaj qhov ua kom muaj zog ntau dua (60 ksi / 415 MPa) piv rau Chav Kawm 1 (50ksi / 345 MPa).
Microstructure:Chav Kawm 1 nta pearlite-ferrite grain qauv los ntawm huab cua txias, hos Chav Kawm 2 muaj tempered martensite/bainite qauv los ntawm cov kua quenching.
Thickness cuam tshuam:Thaum ob qho tib si poob lub zog raws li qhov tuab nce, Chav Kawm 2 tuav lub qab nthab siab dua rau kev siv siab -.
Cov ntawv thov siv
Cov Nkoj Siab:Siv nyob rau hauv fabrication ntawm boilers thiab cia tso tsheb hlau luam uas muaj siab gases los yog kua.
Roj & Roj Kev Lag Luam:Dav siv rau "kev pabcuam qaub" ib puag ncig thiab cia tank hauv refineries.
Tsawg- Kev Pabcuam Kub:Qhov zoo tshaj plaws rau cov qauv ua haujlwm hauv cov huab cua txias uas cov qauv steels yuav ua rau nkig.
Petrochemical cog:Siv rau cov khoom siv hluav taws xob sib txawv thiab cov khoom sib cais qhov kev ntseeg ntawm cov khoom siv tseem ceeb.
ASTM A537 Chav Kawm 1 puas tuaj yeem welded?
Yog lawm, ASTM A537 Class 1 tuaj yeem welded siv cov txheej txheem vuam xws liMIG (Metal Inert Gas), TIG (Tungsten Inert Gas), thiabnplaum welding. Txawm li cas los xij, yuav tsum tau preheating, tshwj xeeb tshaj yog rau cov ntu tuab, kom tsis txhob tawg. Tom qab-weld heat treatment (PWHT) kuj raug pom zoo los txo cov kev ntxhov siab uas seem thiab ua kom cov khoom siv kho kom zoo tom qab vuam.
Dab tsi yog qhov cuam tshuam toughness ntawm ASTM A537 Chav Kawm 1?
ASTM A537 Chav Kawm 1 muaj kev cuam tshuam zoo heev, txawm tias qhov kub thiab txias. Cov hlau yog tsim los kom nqus tau siab - cuam tshuam lub zog yam tsis muaj kev tawg, ua rau nws ntseeg tau nyob rau hauv kev thauj khoom dynamic. Nws qhov toughness yog qhov tseem ceeb tshwj xeeb hauv kev siv xws li cov hlab ntsha siab thiab cov khoom siv hluav taws xob sib txawv, qhov twg cov khoom raug cuam tshuam rau qhov hloov pauv thiab qhov kub thiab txias. Cov txheej txheem normalization ua kom cov hlau muaj peev xwm tiv taus cov pob txha tawg.
Dab tsi yog txheej txheem kev kho cua sov siv rau ASTM A537 Class 1?
Cov txheej txheem kho cua sov rau ASTM A537 Chav Kawm 1 suav nrognormalizing, qhov twg cov hlau yog rhuab mus rau qhov kub thiab txias thiab ces cua -cooled. Cov txheej txheem no refines lub grain qauv thiab txhim kho cov khoom lub zog thiab toughness. Cov txheej txheem normalization txhim kho cov hlau qhov cuam tshuam thiab ua kom ntseeg tau tias nws ua tau zoo nyob rau hauv siab - siab thiab siab - qhov kub thiab txias.
| Qib | C | Si | Mn | P | S | Cr | Mo | Ni | Cu | |
|---|---|---|---|---|---|---|---|---|---|---|
| Tsawg dua los yog sib npaug li 40 mm | >40 mm | |||||||||
| A537 Chav Kawm 1 | 0.24 | 0.15/0.50 | 0.70/1.35 | 1.00/1.60 | 0.035 | 0.035 | 0.025 | 0.080 | 0.25 | 0.35 |
| Qib | Tawm tswv yim (MPa) | Tensile (MPa) | Elongation | Thickness | |
|---|---|---|---|---|---|
| A50 mm | A200 mm | ||||
| A537 Chav Kawm 1 | 345 | 485/620 | 22% | 18% | Tsawg dua los yog sib npaug li 65 |
| 310 | 450/585 | 22% | 18% | >65 Tsawg dua los yog sib npaug rau 100 | |
1 Dab tsi yog lub zog ntawm ASTM A537 Chav Kawm 1?
Lub zog tawm ntawm ASTM A537 Chav Kawm 1 txawv raws li phaj thickness. Rau thicknesses txog 2.5 nti (64 hli), qhov tsawg kawg nkaus yield zog yog50 ksi (345 MPa). Rau cov phaj tuab dua 2.5 ntiv tes (txog 4 ntiv tes lossis 102 hli), qhov tsawg kawg nkaus lub zog yog txo rau45 ksi (310 MPa). Cov txiaj ntsig no ua kom muaj zog hauv siab - cov ntawv thov siab.
2 Dab tsi yog ASTM A537 Chav Kawm 1?
ASTM A537 Chav Kawm 1 yog cov phaj hlau uas siv tau rau kev tsim cov hlab ntsha siab, boilers, thiab lwm yam khoom siv siab -. Paub txog nws lub zog thiab toughness, nws yog tshwj xeeb tshaj yog haum rau ib puag ncig uas muaj kev kub siab thiab kub. Cov txheej txheem normalization txhim kho cov hlau muaj peev xwm tiv taus qhov cuam tshuam, thermal stress, thiab mechanical stress, ua rau nws zoo tagnrho rau kev siv hauv kev lag luam xws li petrochemical thiab hluav taws xob.
3 Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm ASTM A537 Class 1?
Cov tshuaj muaj pes tsawg leeg ntawm ASTM A537 Chav Kawm 1 feem ntau suav nrog cov khoom xws licarbon (C), manganese (Mn), phosphorus (P), sulfur (S), thiab alloying ntsiab xws lichromium (Cr)thiabMolybdenum (Mo). Cov ntsiab lus no muab cov hlau nrog lub zog siab, toughness, thiab tsis kam oxidation. Qhov tseeb muaj pes tsawg leeg sib txawv nyob ntawm qhov tuab thiab cov ntawv thov tshwj xeeb, tab sis lub hom phiaj tag nrho yog txhawm rau txhim kho cov hlau ua haujlwm hauv siab - ib puag ncig siab.
4 Cov kev lag luam twg siv ASTM A537 Class 1?
ASTM A537 Chav Kawm 1 yog siv hauv kev lag luam uas xav tau siab -lub zog, siab- cov ntaub ntawv tiv taus. Qhov no suav nrogpetrochemical, tsim hluav taws xob, chemical ua, thiabroj & rojkev lag luam. Nws muaj peev xwm tiv taus kev kub ntxhov thiab kub ua rau nws tseem ceeb hauv kev tsim khoomcov hlab ntsha siab, boilers, thiabkub exchangers. Cov hlau kuj tseem siv rau hauv kev tsim kho cov txheej txheem tseem ceeb uas yuav tsum muaj kev ntseeg siab hauv kev ntxhov siab.
5 Dab tsi yog qhov tsawg kawg nkaus tawm lub zog ntawm ASTM A537 Chav Kawm 1?
Yam tsawg kawg nkaus lub zog ntawm ASTM A537 Chav Kawm 1 nyob ntawm lub phaj thickness:Rau daim hlau mus txog 2.5 nti (64 mm): 50 ksi (345 MPa) Rau cov phaj tuab dua 2.5 nti (txog 4 ntiv tes lossis 102 hli): 45 ksi (310 MPa)Cov txiaj ntsig no ua kom ntseeg tau tias cov hlau tuaj yeem tiv taus siab - cov kev mob siab yam tsis muaj deformation mus tas li.
ASTM A537 Chav Kawm 1 piv rau lwm cov pa roj carbon steel li cas?
Piv nrog rau carbon steels, ASTM A537 Class 1 muaj superior toughness, siab yield zog, thiab zoo ua hauj lwm rau siab - kub oxidation. Thaum carbon steels haum rau qis dua - kev siv siab, ASTM A537 Chav Kawm 1 yog qhov zoo dua rau kev siab - cov tshuab siab thiab ib puag ncig uas xav tau cov khoom siv los tiv thaiv thermal cycling thiab mechanical stresses. Cov hlau cov txheej txheem normalization txhim kho nws cov kav ntev, ua rau nws zoo tagnrho rau kev xav tau.
7 Lub hardness ntawm ASTM A537 Class 1 yog dab tsi?
Lub hardness ntawm ASTM A537 Class 1 feem ntau yog los ntawm200 txog 250 Brinell. Qhov ntau yam no ua kom muaj qhov sib npaug ntawm lub zog, toughness, thiab tsis kam hnav. Cov ntaub ntawv hardness tso cai rau nws los tiv thaiv txhua yam kev nyuaj siab, thermal cycling, thiab siab - siab tej yam kev mob yam tsis muaj degradation tseem ceeb, ua rau nws tsim nyog rau cov kev siv tseem ceeb xws li cov hlab ntsha siab thiab kub exchangers.
Thov kom muaj kev tshaj lij rau ASTM A537 Chav Kawm 1 los ntawm GNEE Steel.
