A671 CC60 khoom yog dab tsi
ASTM A671 yog tus qauv rau hluav taws xob- fusion-welded steel kav tsim los ntawm American Society for Testing and Materials (ASTM), tshwj xeeb rau cov pa roj carbon steel thiab alloy steel kav siv nyob rau hauv qis - qhov kub thiab txias. Lub npe "CC60" sawv cev rau cov tshuaj muaj pes tsawg leeg thiab cov cuab yeej cuab tam qib ntawm cov yeeb nkab steel. Raws li cov qauv kev cai, cov kav hlau steel ntawm qib CC60 yuav tsum ua tau raws li cov lus qhia tseem ceeb hauv qab no:
Tshuaj muaj pes tsawg leeg: Cov ntsiab lus carbon yog tswj hauv qab 0.30%, nrog cov ntsiab lus manganese xws li 1.00% mus rau 1.60%. Cov kab hlau rhuav tshem cov ntsiab lus xws li npib tsib xee thiab chromium suav nrog txhawm rau txhim kho qis - kub toughness. Cov khoom tsis zoo xws li phosphorus thiab sulfur yog nruj me ntsis txwv (P Tsawg dua lossis sib npaug rau 0.025%, S Tsawg dua lossis sib npaug rau 0.025%).
Mechanical Properties: Qhov tsawg kawg nkaus tawm lub zog yog 415 MPa (60 ksi), lub zog tensile thaj tsam ntawm 485 mus rau 760 MPa, thiab elongation yog ntau dua los yog sib npaug li 20%. Qhov qis- qhov kub thiab txias yuav tsum tau muaj zog ntawm ntau dua los yog sib npaug ntawm 27 J ntawm -46℃ua kom muaj kev tiv thaiv rau cov pob txha tawg hauv qhov chaw txias.
Dimensional Tolerances: Qhov tso cai sib txawv rau sab nraud yog ± 0.75%, phab ntsa thickness sib txawv yog -10% / 12.5%, thiab qhov sib txawv ntawm qhov ncaj yuav tsum tsis pub tshaj 3 hli ib 3 meters.
Cov txheej txheem ntau lawm
ASTM A671 CC60 longitudinally welded steel kav yog tsim los siv siab -frequency resistance welding (ERW) lossis submerged arc vuam (SAW) txheej txheem. Cov txheej txheem tsim khoom tseem ceeb suav nrog:
Phaj Preprocessing: Hlau daim hlau ua raws li cov qauv xws li ASTM A516 Gr60 raug xaiv thiab raug kuaj xyuas qhov tsis zoo ntawm ultrasonic. Ntug milling yog tom qab ntawd ua kom ntseeg tau tias vuam zawj precision.
Tsim thiab Vuam: Cov hlau phaj yog txias- khoov rau hauv cov duab tubular siv JCOE lossis UOE txoj kev tshuab. Multi-wire submerged arc vuam yog ua hauj lwm rau longitudinal seam welding, nrog kev tswj nruj ntawm cov cua sov input (feem ntau khaws cia ntawm 25-35 kJ / cm).
Kev kho Weld: Tom qab vuam, sab hauv thiab sab nraud burrs raug tshem tawm. Kev kho cua sov hauv online (xws li normalizing) yog siv los tshem tawm cov kev ntxhov siab ntawm cov welding residual. Rau qee daim ntawv thov uas yuav tsum tau nruj, tag nrho - cov yeeb nkab quenching thiab tempering kho kuj ua.
Tsis yog -Kev kuaj kev puas tsuaj: 100% ultrasonic kuaj (UT) thiab eddy tam sim no kuaj (ET) yog ua, nrog rau X-ray real- lub sij hawm imaging testing (RT) ntawm cov welds, ua tiav qhov tsis xws luag rhiab heev ntawm 0.5 hli.
Kev Ntsuas Hydrostatic: Kev ntsuas siab yog xam raws li tus qauv qauv (P=2St/D), nrog lub sijhawm tuav tsis pub tsawg dua 10 vib nas this kom ntseeg tau tias siab - cov kabmob muaj peev xwm.
Kev kuaj thiab tshuaj xyuas
Thib peb-Kev soj ntsuam tog: Nws feem ntau yuav tsum tau ntawv pov thawj los ntawm cov koom haum xws li BV, SGS, thiab lwm yam, npog:
Kev tshuaj ntsuam xyuas tshuaj: Tshawb xyuas txhua yam khoom siv ncaj qha - nyeem ntawv kho qhov muag emission spectrometer (OES).
Kev ntsuam xyuas tshuab: -60℃qhov ntsuas kub ntawm qhov ntsuas kub thiab qhov hardness gradient test.
Corrosion test: HIC (hydrogen{0}}induced cracking) resistance test raws li NACE TM0177 tus qauv.
Cov ntaub ntawv xav tau: Txhua pawg ntawm cov kav hlau yuav tsum tau nrog rau Cov Khoom Siv Xeem Ntawv Pov Thawj (MTC), thib peb- tsab ntawv ceeb toom kev tshuaj xyuas (piv txwv li, 3.1/3.2 daim ntawv pov thawj), Tsis yog -Kev Ntsuas Kev Ntsuas (NDT), thiab cov ntaub ntawv kho cua sov.
A671 CC60 EFW Yeeb Nkab Hoobkas
