Dab tsi yog qhov txawv ntawm ASME SA537 Chav Kawm 2 thiab ASME SA537 Chav Kawm 3?
ASME SA537 Chav Kawm 2thiab Chav Kawm 3 yog ob qho tib si quenched thiab tempered carbon-manganese- silicon steel daim hlau rau cov hlab ntsha siab, tab sis lawv sib txawv feem ntau hauv lub zog thiab kev kho cua sov. Chav Kawm 2 muab lub zog ntau dua (60 ksi min yield) rau qhov xav tau, siab - cov ntawv thov siab, thaum Chav Kawm 3 muaj lub zog nruab nrab (55 ksi min yield) nrog kev txhim kho toughness rau tshwj xeeb, qis dua - daim ntawv thov kub.
SA537 Chav Kawm 2 yog qib hwm qib siab ntawm cov hlab ntsha steel uas txuas qhov sib txawv ntawm cov qauv carbon steel thiab qis - alloy variants. Los ntawm kev ua kom dej quenching thiab tom qab siab -kub tempering, nws tsim lub microstructure robust muaj peev xwm los tuav cov txheej txheem nruj heev. Nws yog cov khoom siv ntawm kev xaiv rau "kev pabcuam hnyav" uas lub nkoj yuav tsum nyob twj ywm kom txaus kom nqus tau lub zog thaum muaj zog txaus kom muaj cov pa siab siab lossis cov kua dej siab.
Cov yam ntxwv tseem ceeb
Stress Relief Tolerance:Muaj peev xwm tiv taus Post-Weld Heat Treatment (PWHT) yam tsis muaj qhov poob qis hauv nws cov cuab yeej ntsuas ntsuas.
Fatigue Lub Neej:Lub tempered grain qauv muab superior tiv thaiv kev co thiab cyclic siab hloov.
Kev them nyiaj yug Corrosion Resistance:Nws cov qauv ntom ntom muab lub hauv paus ruaj khov rau ntau yam sab hauv cladding lossis txheej txheej.
Qib Qib
ASME: American Society of Mechanical Engineers.Qhov no qhia tau hais tias cov khoom ua raws li covASME Boiler thiab Pressure Vessel Code (BPVC), tshwj xeeb tshooj II, Ntu A.
S :Qhov no prefix qhia tias cov khoom yogpom zoo tshwj xeebsiv rau hauv ASME siab hlab ntsha kev tsim kho.
A :Cov ntsiab lusKhoom siv ferrous(hlau los yog hlau).
537 :CovStandard Specification naj npawb. Nws txheeb xyuas cov pab pawg tshwj xeeb ntawm "Tshav Kub-Tho Carbon-Manganese-Silicon Steel Phaj" npaj rau fusion-welded siab hlab ntsha.
Chav Kawm 2:Txhais covKev kho cua sov thiab qib zog.
Tsis zoo li Chav Kawm 1 (uas tsuas yog Normalized),Chav Kawm 2 yog quenched thiab Tempered (Q&T).
Sib piv: SA537 Chav Kawm 2 vs. SA738 Qib B
Txoj kev ua kom txias:Ob leeg yogQuenched thiab Tempered, tab sis SA738 Qib B tau ua kom zoo rau cov ntu tuab.
Tensile zog:SA738 Qib B (85-110 ksi}) muab kev txwv siab dua li SA537 Chav Kawm 2 (80-100 ksi).
Daim ntawv thov:SA537 Chav Kawm 2 yog rau dav dav dav -cov hlab ntsha muaj zog; SA738 Qib B yog tshwj xeeb raukev tiv thaiv nuclearthiab loj heev tuab-cov qauv phab ntsa.
Toughness ntawm qhov tob:SA738 Qib B tswj tau zoo duacuam tshuam cov khoomnyob rau hauv daim hlau tshaj 4 nti (100 mm).
Cov ntawv thov siv
Hydrogenation units:Reactors siv los ntxiv hydrogen rau cov tshuaj sib xyaw hauv qab siab.
Blast Chillers:Loj -scale industrial siab chambers rau cov pa ceev ceev-raws li txias.
Pulp Digesters:Siab -cov tshuaj tua kab mob siab siv hauv kev lag luam ntawv loj heev.
Sib sib zog nqus-Tsev Dej Tank:Siab- cov tank tiv taus siv nyob rau hauv lub tshuab thauj tog rau nkoj ntawm ntug dej hiav txwv roj rigs.
Aerospace Nqus Furnaces:Lub plhaub sab nraud rau siab -kub lub tshuab nqus tsev kho mob.
Dab tsi yog txheej txheem kev kho cua sov rau ASME SA537 Chav Kawm 2?
ASME SA537 Chav Kawm 2 tau dhau los ua cov txheej txheem quenching thiab tempering cua sov. Cov hlau yog rhuab mus rau qhov kub siab, ces txias sai heev (quenched), thiab tempered ntawm qhov kub thiab txias. Cov txheej txheem no txhim kho cov hlau lub zog, toughness, thiab tsis kam mus rau nkig tawg, ua rau nws tsim nyog rau cov hlab ntsha siab thiab lwm yam tseem ceeb uas yuav tsum tau tiv taus siab thiab kub.
Dab tsi yog qhov weldability ntawm ASME SA537 Chav Kawm 2?
Yog lawm, ASME SA537 Chav Kawm 2 yog vuam, tab sis yuav tsum tau saib xyuas tshwj xeeb thaum lub sijhawm vuam. Preheating ua ntej welding thiab post-weld heat treatment (PWHT) raug pom zoo kom txo tau qhov kev pheej hmoo ntawm kev tawg thiab kev ntxhov siab. Cov ntsiab lus qis carbon tsawg hauv qib steel no pab txhim kho nws cov weldability piv rau cov pa roj carbon ntau dua.
Dab tsi yog cov ntsiab lus ntawm manganese hauv ASME SA537 Chav Kawm 2?
Cov ntsiab lus manganese hauv ASME SA537 Chav Kawm 2 feem ntau yog li ntawm 0.60% txog 1.35%. Manganese yog ib qho tseem ceeb alloying ntsiab uas txhim khu lub zog, toughness, thiab hardenability. Nws pab cov khoom siv ua haujlwm zoo dua thaum muaj kev ntxhov siab, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas muaj kev kub ntxhov thiab kev ntxhov siab txhua yam, xws li hauv cov hlab ntsha thiab cov khoom siv hluav taws xob.
Mechanical Properties ntawm ASME SA537 Chav Kawm 2
| Tawm tswv yim (MPa) | Tensile (MPa) | Elongation A50 hli | Elongation A200 hli | Thickness |
|---|---|---|---|---|
| 415 | 550/690 | 22% | - | < 65 |
| 380 | 515/655 | 22% | - | >65 <100 |
| 315 | 485/620 | 20% | - | >100 < 150 |
Tshuaj muaj pes tsawg leeg ntawm ASME SA537 Chav Kawm 2
| C | 0.24 |
| Si | 0.15/0.50 |
| Mn < 40mm |
0.70/1.35 |
| Mn >40 hli |
1.00/1.60 |
| P | 0.035 |
| S | 0.035 |
| Cr | 0.25 |
| Mo | 0.80 |
| Ni | 0.25 |
| Cu | 0.35 |
1. Dab tsi yog qhov cuam tshuam toughness ntawm ASME SA537 Chav Kawm 2?
ASME SA537 Chav Kawm 2 yog kuaj rau kev cuam tshuam toughness ntawm qhov kub thiab txias, feem ntau ntawm -50℃F (-46℃). Cov khoom siv yuav tsum nqus tsawg kawg 20 ft-lbs (27 J) ntawm lub zog yam tsis muaj kev tawg. Qhov no ua kom cov hlau muaj peev xwm ua tau raws li qhov cuam tshuam tam sim lossis thermal shocks, uas yog qhov tseem ceeb hauv kev lag luam xws li petrochemical lossis nuclear, qhov chaw siab ntawm cov hlab ntsha raug hloov pauv tam sim ntawd.
2. Dab tsi yog cov ntsiab lus sulfur hauv ASME SA537 Chav Kawm 2?
Cov ntsiab lus sulfur hauv ASME SA537 Chav Kawm 2 yog txwv rau qhov siab tshaj plaws ntawm 0.035%. Sulfur tuaj yeem ua rau embrittlement, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias, yog li txo nws cov ntsiab lus pab txhim kho cov hlau lub toughness thiab cuam tshuam tsis kam. Cov ntsiab lus tsis muaj leej faj txhim kho cov khoom siv tag nrho, ua rau nws tsim nyog rau kev siv cov hlab ntsha hauv kev xav tau.
3. Lub zog tensile ntawm ASME SA537 Chav Kawm 2 yog dab tsi?
Lub zog tensile ntawm ASME SA537 Chav Kawm 2 feem ntau yog li ntawm 70 ksi (485 MPa) txog 90 ksi (620 MPa). Qhov ntau yam no tso cai rau cov khoom siv los tiv thaiv kev ntxhov siab ntawm cov neeg kho tshuab thaum tuav nws cov qauv kev ncaj ncees. Cov hlau yog tsim los siv rau hauv kev siv xws li cov hlab ntsha siab, qhov xav tau lub zog siab los tswj lub siab sab hauv yam tsis ua haujlwm.
4. Cov kev lag luam twg siv ASME SA537 Chav Kawm 2?
ASME SA537 Chav Kawm 2 feem ntau siv hauv kev lag luam xws li petrochemical, roj thiab roj, tsim hluav taws xob, thiab kev ua tshuaj lom neeg. Nws yog feem ntau siv nyob rau hauv fabrication ntawmcov hlab ntsha siab, kub exchangers, reactors, thiab lwm yam khoom siv uas yuav tsum tiv taus qhov kub thiab txias. Cov ntaub ntawv toughness, lub zog, thiab zoo weldability ua rau nws ib tug nrov kev xaiv nyob rau hauv cov sectors no.
5. Cov tshuaj muaj pes tsawg leeg ntawm ASME SA537 Chav Kawm 2 yog dab tsi?
Cov tshuaj muaj pes tsawg leeg ntawm ASME SA537 Chav Kawm 2 suav nrog:.Cov pa roj carbon (C): 0.12-0.20%.Manganese (Mn): 0.60-1.35%.Silicon (Si): 0.15-0.40%,Phosphorus (P):Tsawg dua lossis sib npaug li 0.035%,Sulfur (S):Tsawg dua los yog sib npaug li 0.035%, Qhov kev sib xyaw no muab qhov sib npaug ntawm lub zog, tawv, thiab weldability, kom ntseeg tau tias cov khoom ua tau zoo hauv kev thov cov hlab ntsha siab.
6. Dab tsi yog cov ntsiab lus phosphorus hauv ASME SA537 Chav Kawm 2?
Cov ntsiab lus phosphorus hauv ASME SA537 Chav Kawm 2 yog txwv rau qhov siab tshaj plaws ntawm 0.035%. Phosphorus tuaj yeem cuam tshuam tsis zoo rau cov hlau qhov tawv, tshwj xeeb tshaj yog nyob rau qhov kub thiab txias. Los ntawm kev ua kom cov phosphorus qis qis, ASME SA537 Chav Kawm 2 xyuas kom meej tias cov khoom tseem tawv thiab tiv taus cov pob txha tawg, uas yog qhov tseem ceeb rau cov hlab ntsha siab uas siv nyob rau hauv qis - qhov kub thiab txias.
7. Dab tsi yog qhov elongation ntawm ASME SA537 Chav Kawm 2?
ASME SA537 Chav Kawm 2 feem ntau muaj qhov elongation tsawg kawg yog 18% hauv 8 ntiv tes (200 hli). Qhov no qhia tau hais tias cov khoom muaj peev xwm ncav cuag thiab deform yam tsis muaj kev tawg, uas yog ib qho tseem ceeb hauv kev siv cov hlab ntsha siab uas cov khoom yuav ntsib kev ntxhov siab lossis kev cuam tshuam tam sim ntawd. Qhov siab elongation no ua kom cov kav ntev thiab kev nyab xeeb hauv kev ua haujlwm hnyav.
Tiv tauj peb ntawm info@gneesteels.com rau tus nqi, kev txhawb nqa, lossis kev daws teeb meem. Peb yeej ib txwm npaj los txhawb koj qhov project.
