A671 CC70 txhais li cas
ASTM A671 yog tus qauv rau hluav taws xob -fusion-welded (EFW) carbon steel yeeb nkab rau atmospheric thiab qis dua - qhov kub thiab txias, thiab CC70 yog ib qho ntawm nws cov qib. Nyob rau hauv lub npe, cov ntawv CC qhia txog lub hauv paus phaj specification, ASTM A516 Qib 70, thiab tus lej 70 yog qhov tsawg kawg nkaus tensile lub zog ntawm cov yeeb nkab tiav hauv ksi, sib npaug li 485 MPa. Cov yeeb nkab yog tsim los ntawm kev sib sau phaj rau hauv lub tog raj kheej thiab vuam qhov ntev seam los ntawm tsis siv neeg submerged arc vuam. A671 CC70 yog siv rau loj - txoj kab uas hla piping nyob rau hauv refineries, fais fab chaw nres tsheb, tshuaj nroj tsuag, thiab tub yees, qhov twg cov khoom seamless ntawm qhov yuav tsum tau muaj qhov loj me yog tsis siv.
Phaj Khoom
Lub hauv paus phaj, A516 Qib 70, yog cov pa roj carbon steel phaj rau cov hlab ntsha siab ntawm qhov nruab nrab thiab qis qis, nrog qhov tsawg kawg nkaus lub zog ntawm 260 MPa (38 ksi) rau cov tuab tuab thiab ntau tensile ntawm 485 txog 620 MPa. Cov kev txwv muaj pes tsawg leeg yog kwv yees li 0.28% carbon siab tshaj plaws, 0.85 txog 1.20% manganese, 0.035% phosphorus, thiab 0.035% sulfur, nrog silicon 0.13 txog 0.45%. Lub phaj yog ua los ntawm kev ua kom zoo-grain tua xyaum, uas ua rau cov tawv tawv uas qis dua - qhov kub thiab txias yuav tsum tau. Daim ntawv pov thawj cov yeeb nkab qhia txog kev txheeb xyuas cov phaj kub thiab qhov ua tiav - yeeb nkab cov ntsiab lus.
Thaum tshav kub kub-Cov chav kho mob
Cov chav kawm tus naj npawb hauv lub npe txhais tau hais tias kev kho cua sov ntawm cov yeeb nkab welded tiav. Cov chav kawm siv tau yog 10, 20, 30, 40, 50, 60, 70, thiab 80: Chav kawm 10 yog muab tsis tau tom qab-weld heat treatment, thiab cov chav kawm siab dua ntxiv kev ntxhov siab, normalizing, normalizing thiab tempering, los yog quenching thiab tempering. Rau cov qib A516-raws li, ncej-weld tshav kub-kho qhov ntau yog li 590 txog 680 C, qhov normalizing kub yog li 925 C, thiab txoj kev quenching thiab tempering siv quenching kub txog li 900 C nrog tempering ntawm qhov tsawg kawg nkaus ntawm 650 C, 1 cov ntaub ntawv xws li kev lag luam. tsis yog ib feem ntawm tus qauv; chav kawm yeej ib txwm yog ib qho ntawm kaum qhov tseem ceeb.
Kev tsim khoom thiab kev sim
Cov yeeb nkab yog tsim los ntawm phaj, thiab cov seam ntev yog welded los ntawm ob -sided submerged arc vuam. Kev sim suav nrog kev ntsuas tensile ntawm lub hauv paus hlau thiab cov vuam, kev ntsuas khoov ntawm qhov vuam, kev sim hydrostatic, thiab tsis yog - kev kuaj xyuas qhov ntev ntawm qhov vuam, feem ntau yog radiography, nrog rau qhov pom zoo rau qhov kev pabcuam. Rau qis dua -tej dej kub, Charpy V- qhov ntsuas qhov cuam tshuam tau teev nyob rau ntawm qhov ntsuas kub tsim, nrog rau kev txwv kev cuam tshuam - cov qhab nia ntsuas nyob ib puag ncig -50 F (-45 C). Daim ntawv pov thawj zeb rau EN 10204 3.1 lossis 3.2 cov ntaub ntawv ntawm cov phaj chemistry, cov txiaj ntsig ntawm cov tshuab, cov ntaub ntawv kho cua sov, thiab cov txiaj ntsig NDE.
Daim ntawv thov
A671 CC70 yeeb nkab yog siv rau loj - txoj kab uas hla thiab cov kav dej siv hluav taws xob: cov kav dej hloov pauv, cov kav dej petrochemical, lub zog- chaw nres tsheb cua txias thiab chav ua haujlwm, thiab tub yees - cov chaw siv roj. Qhov tsawg kawg nkaus tensile lub zog 70 ksi muab cov phab ntsa sib zog dua cov qib qis rau tib lub siab, thiab cov nplua- cov phaj nplej muab lub zog xav tau ntawm qhov kub thiab txias. Rau siab - kev pabcuam siab ntawm qhov kub nruab nrab, tus qauv A672 tus khub siv, thiab rau qhov kub thiab txias hauv qab A671 txwv, A333 lossis austenitic stainless hlau yuav tsum.
Cov lus nug nquag
Q: CC70 txhais li cas hauv A671?
Cov ntawv CC txheeb xyuas lub hauv paus phaj rau ASTM A516 Qib 70, thiab 70 yog qhov tsawg kawg nkaus tensile lub zog ntawm cov yeeb nkab tiav hauv ksi (485 MPa).
Q: Cov chav kawm A671 txhais li cas?
Chav kawm 10 txog 80 hauv cov kauj ruam ntawm kaum, piav qhia txog kev kho cua sov. Cov lej xws li 11, 12, lossis 13 tsis yog ib feem ntawm tus qauv.
Q: Dab tsi yog qhov qis - qhov ntsuas kub?
Kev cuam tshuam - cov qhab nia xeem npog cov kev pabcuam mus txog -50 F (-45 C); Cov kev pabcuam txias txias yuav tsum tau A333 lossis stainless hlau.
Q: Dab tsi phaj siv rau CC70?
ASTM A516 Qib 70, nplua - nplej tua lub siab- lub nkoj phaj nrog qhov tsawg kawg nkaus ntawm 260 MPa.
Q: Yuav tsum tau xeem dab tsi?
Tensile xeem ntawm lub hauv paus hlau thiab weld, coj khoov kev sim, hydrostatic kuaj, radiography los yog lwm yam NDT ntawm weld, thiab Charpy impact testing thaum teev.
Q: Qhov txawv ntawm A671 thiab A672 yog dab tsi?
A671 npog EFW yeeb nkab rau atmospheric thiab qis dua -kev pabcuam kub; A672 npog tib tsev neeg cov khoom rau siab - kev pabcuam siab ntawm qhov kub nruab nrab.
