Dab tsi yog cov khoom siv uas nquag siv rau cov hlau wrded kav?
Cov ntaub ntawv siv rau cov roj carbon hlau welded suav nrog Q235, 20 #, 16 xyoo yog ib qho kev tsim kho zoo li qub, haum rau kev tsim kho thiab cov kev thauj khoom qis; Q345 yog cov hlau tsawg-alloy nrog lub zog siab dua, siv rau cov neeg kho tshuab cov cuab yeej siv hluav taws xob. 20 # Steel yog cov pa roj carbon hlau zoo, feem ntau yog siv hauv cov leeg boiles thiab cov tshuab hydraulic. 16MN (sib raug rau tus qauv thoob ntiaj teb ATM A572) muaj qhov tsis tshua muaj weldability thiab qis-kub nyuaj, tsim nyog rau kev siv tshuab thiab cov hlab ntsha siab. Kev xaiv ntawm cov khoom sib txawv yuav tsum tau raws li lub zog, weldability thiab tus nqi.
Dab tsi yog qhov sib txawv ntawm Q235 thiab 20 # steel welded kav?
Q235 yog cov pa roj carbon steel nrog cov ntsiab lus carbon nrog 0. 14% ~ {3}}. 22%. Nws muaj lub zog tsawg tab sis kev du me thiab yog pheej yig. Nws yog dav siv nyob rau hauv kev tsim cov scaffolding thiab cov neeg tiv thaiv. 2 {0 # steel muaj 0. 17% ~ 0.24% carbon hlau nrog me ntsis siab dua lub zog thiab hardness. Feem ntau nws siv rau kev thauj mus los thiab cov khoom siv tshuab hauv nruab nrab siab. 20 # steel muaj kev siv vuam ua tau zoo dua qub thiab Weld tsis yooj yim mus tawg, tab sis tus nqi yog siab dua Q235. Tsis muaj ib qho tseem ceeb hauv kev kho mob txhawm rau kho ntawm ob, tab sis 20 # steel yog qhov haum ntau rau kev ua cov xwm txheej precision.
Yuav sim ntsuas cov khoom siv cov pa roj carbon steel welded kav?
Cov kev ntsuam xyuas tshuab xws li cov kev ntsuam xyuas Tensile (kuaj lub zog (mus kuaj mob (kuaj lub zog qes Tensile cov kev ntsuam xyuas yuav tsum tau samped raws li GB \/ T 228 tus qauv thiab ua tiav siv lub tshuab kuaj xyuas thoob ntiaj teb; Kev ntsuam xyuas nyuaj yog feem ntau ua rau saum npoo lossis weld ntawm welded yeeb nkab; Cov kev ntsuas cuam tshuam yuav tsum tau kuaj xyuas ntawm -20 degree lossis qis dua los sim lub charpy cuam tshuam lub zog. Cov ntaub ntawv no ncaj qha rau kev nyab xeeb siv ntau ntawm welded kav.
Cov ntsiab lus ntawm cov roj carbon cov ntsiab lus ntawm kev ua haujlwm ntawm welded kav?
Cov ntsiab lus ntxiv cov ntsiab lus nce ntxiv lub zog thiab hardness ntawm cov hlau, tab sis txo cov zog thiab tawv. Tsawg cov roj carbon hlau (xws li Q235) yog ib qho yooj yim rau Weld thiab muaj cov kev tsim nyog zoo, haum rau kev txias dua; Nruab Nrab Carbon Steel (xws li 45 # steel) muaj siab tawv tab sis xav tau preheated thaum vuam kom tsis txhob tawg. Cov pa roj carbon hlau siab (xws li 6 0 # steel) tsis tshua siv siv hauv cov kav dej welded vim tias nws cov tsis zoo weldability thiab nkig tawg. Tsis tas li ntawd, ntau dua cov ntsiab lus carbon ntau ntxiv yuav ua rau muaj kev pheej hmoo ntawm kev pheej hmoo ntawm kev cuam tshuam ntawm kev txhim kho corrosion, tshwj xeeb tshaj yog nyob rau hauv acidic ib puag ncig. Feem ntau cov ntsiab lus carbon ntawm welded kav yog tswj tau hauv qab 0.3% los xyuas kom muaj kev ua tau zoo.
Dab tsi yuav tsum tau them nyiaj rau hauv carbon steel welded kav dej tsis muaj mob kub?
Carbon Steel yog nquag mus txias brittleeness nyob rau hauv cov kev mob kub tsawg, thiab 09mnnidr (rau}}} degree) yuav tsum tau xaiv. Cov ntsiab lus kev nyab xeeb yuav tsum tau nce thaum tsim qauv kom tsis txhob muaj kev ntxhov siab; Cov hluav taws xob hydrogen ntau yuav tsum tau siv thaum lub sij hawm vuam, thiab preheating thiab interlayer kub yuav tsum tau nruj me ntsis tswj. Charpy cuam tshuam kev xeem hauv qab no -20} degree yuav tsum tau txheeb xyuas kev nruj ua ntej siv. Hauv cov cheeb tsam txias heev (xws li Arctic Pipelines), nws yuav tsim nyog los hloov kho rau Nickel Alloy Steel lossis ua tshwj xeeb cua sov kom txhim kho qhov kub kub.
