A333Gr.6 seamless steel yeeb nkab belongs rau nickel -dawb qis-kub steel yeeb nkab. Nws yog ib qho zoo -grained low- kub tawv steel deoxidized nrog txhuas, li no nws kuj hu ua txhuas-tua hlau. Nws cov qauv metallographic yog lub cev -centered cubic ferrite.
tshuaj muaj pes tsawg leeg
Chemical Element Analysis
Cov pa roj carbon (C)
C tuaj yeem tsim cov kev daws teeb meem interstitial hauv cov hlau. Thaum kho cua sov, qhov sib txawv los yog sib cais ntawm cov pa roj carbon atoms muaj qhov cuam tshuam loj rau kev tsim thiab faib cov carbides thiab cov khoom ntawm cov hlau. Carbides yog cov theem nyuaj uas tuaj yeem txhim kho lub zog, hardness, thiab hnav tsis kam ntawm cov hlau, tab sis tsis tsim nyog rau kev txhim kho lub zog ntawm cov hlau. Yog li ntawd, cov ntsiab lus carbon yuav tsum tau tsawg.
Si and Mn
Si yog siv nyob rau hauv steelmaking kom tshem tawm oxygen los ntawm hlau. Si pab txhim kho lub siab -kub deoxidation thiab acid corrosion kuj ntawm steel. Mn yog ib qho kev txhawb zog uas tuaj yeem txhim kho hardness, hnav tsis kam, thiab ruaj khov ntawm austenite hauv steel. Txawm li cas los xij, Mn yooj yim tsim MnS suav nrog S, uas muaj kev cuam tshuam rau cov khoom ntawm cov hlau.
S thiab P
Los ntawm qhov kev xav ntawm qhov cuam tshuam ntawm cov ntsiab lus ntawm qis- qhov kub thiab txias, C, Si, P, S, thiab N feem ntau suav hais tias yog cov khoom tsis zoo, nrog rau P yog qhov phom sij tshaj plaws, thaum Mn thiab Ni yog cov khoom muaj txiaj ntsig. Yog li ntawd, ASTM A 333/A333M-2013 feem ntau tso siab rau Mn los txhim kho qhov kev ua haujlwm kub qis ntawm Gr6, thaum tswj hwm cov ntsiab lus S thiab P.
Nws element
Ni yog cov khoom siv alloying uas txhawb kev ruaj khov ntawm austenite, uas muaj txiaj ntsig zoo rau kev txhim kho cov yas thiab lub zog ntawm cov hlau, thaum txo qis qhov nkig - nyuaj hloov ntawm cov hlau. Nickel- nplua nuj thim rov qab austenite tuaj yeem khaws cia ruaj khov nyob rau hauv qhov kub tsis tshua muaj siab, uas muaj qhov cuam tshuam tseem ceeb ntawm kev txhim kho qhov qis - kub toughness ntawm A333Gr6. Versions ntawm A333GR.6 tom qab 2016 ntxiv txhim khu nws qhov qis -kub kev ua tau zoo nrog ntxiv ntawm Ni thiab alloying los ntawm V, Nb, thiab lwm yam.
