ASTM A533 Qib B yog dab tsi?
Yam tsawg kawg nkaus uas pom zoo ua haujlwm kub rau ASTM A533 Qib B, ib qho uas nquag siv manganese-molybdenum-nickel alloy steel rau cov hlab ntsha siab, yog kwv yees li -75∘F(-59∘C). Nws feem ntau yog siv rau hauv cov ntawv thov kom muaj zog ntawm qhov kub thiab txias, xws li nuclear reactor siab hlab ntsha, uas feem ntau ua haujlwm tshaj qhov pib no.
ASTM A533 Qib B yog kev nyab xeeb- cov khoom siv tseem ceeb siv nyob rau hauv ib puag ncig uas tsis ua haujlwm tsis yog qhov kev xaiv. Nws yog cov khoom siv tseem ceeb siv rau "ntim" ntawm cov tshuaj tiv thaiv nuclear, xaiv rau nws lub peev xwm los tiv thaiv kev laus ntawm cov cua sov, siab, thiab hluav taws xob tshaj li 40-rau-60-xyoo lifespan.
Cov yam ntxwv tseem ceeb:
High Fracture Toughness:Ua raws li kev nyab xeeb loj heev, yuav tsum muaj lub zog loj heev los pib lossis nthuav tawm qhov tawg.
Creep Resistance:Muaj peev xwm tiv taus qhov siab tsis tu ncua - siab loads ntawm siab kub yam tsis tau maj mam deforming lub sij hawm.
Homogeneity:Ua los ntawm kev siv lub tshuab nqus tsev degassing kom ntseeg tau tias tsis muaj cov pa roj hauv lub hnab lossis qhov chaw tsis muaj zog.
Qib Qib:
ASTM A533 Cov Lus Qhia:Specification rau nuclear-qib Mn-Mo-Ni alloy.
Qib B:Txheeb xyuas cov chemistry tshwj xeeb (Nickel{0}} ntxiv qhov sib txawv).
Kev sib piv: ASTM A533 Qib B vs ASTM A387 Qib 22
Lub zog: A533 Qib B muaj zog dua hauvyield zogpiv rau A387 Qib 22, uas yog tsim los rausiab -kubkev pabcuam.
Toughness: A533 Qib B muab tau zoo dualow-kub los tiv thaiv, whereas A387 Qib 22 yog tsom rau ntau duasiab -kubkev ua tau zoo hauv kev tsim hluav taws xob thiab cov hlab ntsha siab.
Daim ntawv thov: A533 yog siv rau hauvnuclear reactors, thaum A387 feem ntau siv rauboilers thiab kub exchangersqhov twg qhov kub thiab txias yog thawj qhov kev txhawj xeeb.
Daim Ntawv Thov Kev Sib Tham
Nuclear reactor siab hlab ntsha: Siv los xyuas kom meejstructural kev ncaj nceeshauvsiab -kev nyuaj siabib puag ncig.
Cov hlab ntsha siabhauvkev lag luam tshuaj: Rau cov reactors thiab cov hlab ntsha uas tswj kev kub siab thiab kub heev.
Cryogenic tanks: Xyuas kom meejqis -kub tsis kamrau liquefied gas cia thiab thauj.
Heavy industrial khoom: Tsim nyog rau cov cuab yeej siv rau cov neeg kho tshuab siab thiab kev hloov pauv siab.
ASTM A533 Qib B tiv thaiv pob txha tawg li cas?
ASTM A533 Qib B tiv thaiv pob txha tawg vim nwsquenched thiab tempered microstructure, uas muab siabtawvthiabductilityntawm qhov kub thiab txias. Cov hlau tswj tautshuaj muaj pes tsawg leegthiab cov txheej txheem kho cua sov pab kom ntseeg tau tias nws tseem nyobresistant rau brittle tsis ua hauj lwmtxawm tias nyob rau hauv kev ntxhov siab heev los yog kub hauv qab khov, ua rau nws zoo tagnrho rauDaim ntawv thov cryogenicnyiamLNG cia khoomlos yogcov hlab ntsha siabhauvnuclear reactors.
Dab tsi yog cov thicknesses muaj rau ASTM A533 Qib B?
ASTM A533 Qib B feem ntau muaj nyob rau hauvdaim hlau tuab, xws li20 mm rau 100+ mm, nyob ntawm qhov chaw tsim khoom thiab daim ntawv thov. Cov khoom siv feem ntau yog siv rausiab - cov hlab ntsha siabthiabhnyav industrial sivqhov twg tuab, muaj zog daim hlau yuav tsum tau tiv thaiv ob sab hauv siab thiab mechanical stresses. Lub thickness ntawm daim hlau yog nyob ntawm cov kev cai tshwj xeeb ntawm daim ntawv thov, suav nrogcov lej tsimthiabkev ntsuas siab.
Qhov elongation ntawm ASTM A533 Qib B yog dab tsi?
Covelongationntawm ASTM A533 Qib B feem ntau yog nyob ib puag ncig18%hauv a200mm gauge ntev, uas muab txausductilityrau cov khoom yuav tsum tau tsim, welded, thiab ua tiav thaum fabrication. Thaum cov hlau yog tsim rausiab zog, qib noelongationxyuas kom nws muaj peev xwm tiv tausmechanical zogthaum lub sij hawm tsim cov txheej txheem tsis muaj kev paubbrittle puas.
|
Qib Steel |
Cov tshuaj tseem ceeb ntawm A533 Qib B CL3 |
||||||
|
C |
Si |
Mn |
P |
S |
Mo |
Ni |
|
|
A533GrBCl3 |
0.25 |
0.13/ 0.45 |
1.07/ 1.62 |
0.035 |
0.035 |
0.41/ 0.64 |
0.37/ 0.73 |
Mechanical Properties
| Khoom | Metric | Imperial |
|---|
| Tensile zog | 485-620 MPa | 70-90 hli |
| Yield zog | 280-345 MPa | 41-50 hli |
| Brinell Hardness | 135-175 HB | 135-175 HB |
| Rockwell Hardness | 85-95 IB | 85-95 IB |
| Vickers Hardness | 140-190 HV | 140-190 HV |
| Elongation | 18 – 22% | 18 – 22% |
| Elastic Modulus | 200 GPa | 29ms ua |
1. ASTM A533 Qib B yog dab tsi?
ASTM A533 Qib B yog aquenched thiab tempered alloy steeltsim los siv rau hauvsiab - cov hlab ntsha siabthiablow-kub siv. Nws yog feem ntau siv hauv kev lag luam xws linuclear zog, chemical ua, thiabpetrochemicalqhov twg cov ntaub ntawv yuav tsum tau tiv taus huab cua puag ncig. Cov hlau sib xyaw ua ke siabyield zogthiabtawv, ua rau nws zoo tagnrho rau cov ntawv thov uas xav tau kev tiv thaiv kom tawg tawg thiab deformation nyob rau hauv kev ntxhov siab.
2. Dab tsi yog qhov kev ua tau zoo ntawm ASTM A533 Qib B?
Covyield zogntawm ASTM A533 Qib B yog feem ntau345 MPa (50 ksi)los yog siab dua, muab kev tiv thaiv zoo rau kev deformation mus tas li nyob rau hauv siab -load tej yam kev mob. Qhov no tseem ceeb tshwj xeeb hauv kev siv xws licov hlab ntsha siab, qhov twg cov hlau xav tau los tiv thaiv kev ntxhov siab hauv lub cev yam tsis tau poob nws cov qauv kev ncaj ncees. Lub zog yield zog yog ib qho ntawm cov laj thawj tseem ceeb ntawm cov khoom no yog nyiam rauhigh -siab tshuab.
3. ASTM A533 Qib B tau kho li cas?
ASTM A533 Qib B yog feem ntauquenched thiab temperedkom ua tiav nws qhov kev xav tausiab zogthiabtawv. Tom qab cua sov cov hlau mus rau qhov kub thiab txias, nws yog txias sai heev (quenched), uas ntxiv dag zog rau cov khoom. Nws yog ces tempered, uas txo brittleness thiab txhim khu nwsductilitythiabcuam tshuam tsis kam. Qhov kev sib xyaw ua ke no ua kom cov hlau tuaj yeem tiv taussiab -kev nyuaj siabthiabqis -kubib puag ncig zoo linuclear reactorsthiabcov hlab ntsha cryogenic.
4. Lub zog tensile ntawm ASTM A533 Qib B yog dab tsi?
Covtensile zogASTM A533 Qib B yog nyob ntawm485-620 MPa (70-90 ksi), muab lub zog tseem ceeb rau kev siv lub nkoj siab. Cov khoom muaj peev xwm tiv taus kev ntxhov siab tsis muaj deformation, ua rau nws zoo tagnrho rausiab -siabtshuab. Qhov sib npaug ntawm tensile lub zog thiabelongation(~ 18%) xyuas kom meej tias nws tseem tshuav ob qho tib simuaj zogthiabductileraws li kev xav tau ntawm kev ua haujlwm.
5. ASTM A533 Qib B puas tuaj yeem welded?
Yog lawm, ASTM A533 Qib B tuaj yeem welded, tab sistswj cov txheej txheem vuamNws yog ib qho tsim nyog los xyuas kom meej qhov kev ncaj ncees ntawm cov pob qij txha welded. Preheating yog pom zoo kom tsis txhob tawg, thiab qis -hydrogen electrodes yuav tsum tau siv los txo qhov kev pheej hmoo ntawmhydrogen{0}}induced cracking. Kev xa tawm kom raug-weld heat treatment (PWHT) kuj tseem yuav tsim nyog los txo cov kev ntxhov siab uas seem thiab txhim kho qhov tawv ntawm cov cua sov- thaj tsam cuam tshuam.
6. Kev lag luam dab tsi feem ntau siv ASTM A533 Qib B?
Kev lag luam uas feem ntau siv ASTM A533 Qib B suav nrognuclear zog, chemical ua, roj thiab roj, thiabtsim hluav taws xob. Nws yog tshwj xeeb tshaj yog haum rau kev siv xws licov hlab ntsha siab, boilers, tshuaj reactors, thiabcryogenic cia tanks. Cov khoom sivzogthiablow -kub toughnessua kom nws zoo tagnrho rau cov ntawv thov kev lag luam tseem ceeb uas xav tau ob qho tib sikev ntseeg tauthiabkev nyab xeebnyob rau hauv cov xwm txheej heev.
7. ASTM A533 Qib B piv rau ASTM A516 Qib 70 li cas?
ASTM A533 Qib B muaj siab duayield zogthiabtensile zogpiv rau ASTM A516 Qib 70, ua kom nws haum rausiab -kev siv siab. Thaum A516 Qib 70 feem ntau siv hauvnruab nrab- cov hlab ntsha siab, A533 Qib B muaj peev xwm tiv taussiab heevthiabqhov kub thiab txiasua rau nws cov khoom ntawm kev xaiv rau daim ntaub ntawv xws linuclear reactorsthiabcov hlab ntsha cryogenic, qhov twgzogthiabresiliencetseem ceeb.
Thov ib tug kws tshaj lij hais rauASTM A533 Qib Blos ntawm GNEE Steel.
