1. Dab tsi yog cov neeg kho tshuab ua tus "360" nyob rau hauv lub npe L360 steel yeeb nkab tshwj xeeb xa mus rau?
Tus lej "360" hais ncaj qha yog hais txog qhov tshwj xeeb tawm los muaj zog, ntsuas hauv MegaceStascals, uas L360 steel yeeb yuav tsum sib ntsib. Tos lub zog yog qhov kev ntxhov siab tseem ceeb ntawm uas ib qho khoom siv pib ua kom tau cov khoom siv tau yooj yim thiab yog cov cuab yeej tseem ceeb heev cov cuab yeej hauv cov kav dej. Cov qauv yeeb nkab steel steel feem ntau siv 0.5% tag nrho elongation kev ntxhov siab vim tias cov txiaj ntsig zoo zog. Qhov no txhais tau tias thaum ntsuas tensile, kev siv kev ntxhov siab tas los yuav tsum yog yam tsawg kawg 360 MPa thaum lub ntsuas cua ntawm lub ntsuas qhov ntev tshwm sim. Qhov no yog qhov yuav tsum tau ua kom ua tiav uas txhua tus L360 steel yeeb nkab yuav tsum tau ua tiav. Cov txiaj ntsig lub zog ntawm tsim cov yeeb nkab steel yog feem ntau yog siab dua tus nqi no, tab sis tsis nyob hauv ib qho thiab tsis muaj ntau dhau, txwv tsis pub nws yuav cuam tshuam VASITY.
2. Ntxiv rau paib lub zog, dab tsi yog lub tensile muaj zog yuav tsum muaj rau l360 steel yeeb nkab?
Lub zog tensile yog qhov kev ntxhov siab tshaj plaws uas cov khoom siv tuaj yeem tiv taus ua ntej tawg; Nws sawv cev rau cov khoom siv qhov kawg load - cov kabmob muaj peev xwm. Cov En 10208 tseem qhia meej txog cov kab kom pom tseeb rau lub zog tensile ntawm L360 steel yeeb nkab, feem ntau xav tau tsawg kawg 460 MPa. Qhia meej txog ob qho tib si sab saud thiab qis dua yog qhov tseem ceeb sib luag. Cov kev txwv qis dua sawv daws cov yeeb nkab ruaj khov rau cov hlau ua kom muaj peev xwm ua rau cov yeeb nkab ntau dhau los ntawm kev ua kom zoo dua qub Lub zog tsim nyog tensile muaj zog, ua ke nrog cov txiaj ntsig muaj zog, txhais cov khoom siv lub zog- yooj yim sib npaug.
3. Vim li cas thiaj elongation qhov ntsuas tseem ceeb rau kev ntsuam xyuas cov yeeb yam ntawm L360 steel yeeb nkab?
Elongation yog qhov taw qhia tseem ceeb ntawm cov ntaub ntawv plasticity, qhia tias nws muaj peev xwm hla dhau los ua ntej tawg. Rau l360 steel yeeb nkab, txhais tau tias nws tuaj yeem tiv taus qee lub sijhawm teeb tsa (xws li khoov (muab cov npoo kev nyab xeeb rau kev teeb tsa. Thaum lub sijhawm ua haujlwm, yog tias lub raj xa dej undergoes nyob rau hauv lub zos deformation vim tias peb {{{{{{} Kev muaj kev ntxhov siab ua rau muaj kev cuam tshuam rau kev nkag mus rau kev tawg. Tsis tas li ntawd, tus hlau nrog cov zoo huv feem ntau muaj kev nkees zoo dua thiab ua kom tsis taus. Yog li ntawd, tus qauv qhia meej qhov tsawg kawg rau L360 (piv txwv li, nyob ntawm ntsuas cua ntev thiab phab ntsa tuab) kom ntseeg tau tias yog qhov zoo deformation.
4. Dab tsi yog lub hom phiaj ntawm lub charpy v - cov yeeb nkab nessch rau l360 steel yeeb nkab?
Lub charpy v - Cov Lus Cuam Tshuam Tsis pom zoo rau kev ntsuam xyuas cov khoom siv tawv, tshwj xeeb yog nws txoj kev tiv taus rau brittle begiture. Rau l360 steel yeeb nkab, qhov kev ntsuas no feem ntau ntsuas nws kev cuam tshuam lub zog nqus ntawm qhov kub tshwj xeeb. Pipelines tuaj yeem ua haujlwm hauv qhov qis - huab cua, lossis cov ntoo sib txawv, lossis cov ntoo sib sib zog nqus), qhov twg steel nyhav los ntawm ducities rau cov khoom siv brittle. Los ntawm kev ua haujlwm cuam tshuam kev ntsuas ntawm cov sib txawv kub, lub ducile {6} {{} Tus nqi hloov pauv ntau dua los yog sib npaug ntawm 40 J lossis siab dua) tuaj yeem ua kom zoo tshaj plaws tsim kub. Kev cuam tshuam loj heev tuaj yeem tiv thaiv cov kab mob tawg thiab kev hais tawm, muab kev tiv thaiv kev ua phem rau kev puas tsuaj rau kev puas tsuaj rau hauv lub xov tooj.
5. Dab tsi yog qhov tseem ceeb ntawm kev sim hardness rau L360 Hlau Yeeb Nkab, thiab dab tsi yog nws cov qauv txwv?
Thaum Hardness Testing tsis yog lub hauv paus tseem ceeb rau kev lees txais ntawm L360 steel yeeb nkab, nws yog qhov nrawm thiab yooj yim ua haujlwm zoo tshuaj. Kev tawv tawv muaj nuj nqis tsis ncaj ncees xav txog cov khoom siv lub zog, hnav tsis kam, thiab weldability. Tseem ceeb tshaj, tom qab vuam, kev sim ua kom tawv ntawm Weld thiab tshav kub- cuam tshuam cheeb tsam yog xav tau. Cov qauv (xws li dnvggl- pos}}}}} f101) teeb tsa qhov siab kawg li kev txwv; Piv txwv li, HV10 feem ntau yuav tsum tau ua kom tsis pub dhau 280. Lub hom phiaj tseem ceeb yog los tiv thaiv hydrogen {}} Lub cev ua haujlwm txias (xws li Martensite) yog rhiab heev rau hydrogen embrittlement. Los ntawm kev tswj lub hardness, microstructure nyob hauv thaj chaw weld yog qhov ua kom ncaj qha rau kev nyuaj siab, yog li kev txhim kho tag nrho kev ntseeg tau ntawm WHDD sib koom tes.
