Spiral Submerged Arc Welded (SSAW) steel kavfeem ntau yog siv rau hauv ntau yam kev lag luam xws li kev thauj mus los ntawm cov kua thiab roj, kev tsim kho, thiab kev tsim kho vaj tse. Cov cuab yeej cuab tam ntawm SSAW steel kav yog qhov tseem ceeb hauv kev txiav txim siab lawv lub zog, ua haujlwm ntev, thiab tsis kam mus rau deformation nyob rau hauv ntau yam mob. Cov khoom no yog cuam tshuam los ntawm qib steel, vuam txheej txheem, thiab kev kho cua sov.
Nov yog qee cov khoom tseem ceeb ntawm SSAW steel kav:
1. Lub zog tensile
Txhais: Qhov siab tshaj plaws kev ntxhov siab uas cov khoom tuaj yeem tiv taus thaum raug ncab lossis rub ua ntej tawg.
Hom Ntau Yam: 450 txog 600 MPa (nws txawv raws li qib ntawm cov hlau siv).
Qhov tseem ceeb: Lub zog tensile siab yog qhov tseem ceeb rau cov yeeb nkab kom tiv thaiv kev tawg lossis tsis ua haujlwm thaum lub sij hawm thauj mus los ntawm cov dej siab -.
2. Yield zog
Txhais: Qhov kev ntxhov siab ntawm cov khoom siv pib deform plastically, cim qhov kawg ntawm tus cwj pwm elastic.
Hom Ntau Yam: 280-450 MPa.
Qhov tseem ceeb: Lub zog tawm los txiav txim siab lub nra ntawm qhov pib deformation mus tas li, qhia tias cov yeeb nkab tsis kam khoov los yog tawm los ntawm lub siab.
3. Elongation
Txhais: Qhov℃uas cov khoom tuaj yeem ncav cuag ua ntej tawg, qhia raws li qhov feem pua ntawm qhov qub ntev.
Hom Ntau Yam: 16% mus rau 25% (nyob ntawm qib steel thiab txoj kab uas hla).
Qhov tseem ceeb: Cov txiaj ntsig elongation siab dua qhia tau qhov yooj yim dua thiab muaj peev xwm tiv taus deformation yam tsis muaj kev tawg.
4. cuam tshuam toughness
Txhais: Lub peev xwm ntawm cov khoom siv los nqus lub zog thiab deform plastically ua ntej fracturing, feem ntau yog kuaj ntawm qhov kub thiab txias.
Hom Ntau Yam: 40 J txog 100 J (nws txawv nrog qhov kub thiab txias).
Qhov tseem ceeb: Cov kev cuam tshuam zoo ua kom ntseeg tau tias cov yeeb nkab steel tuaj yeem tiv taus kev cuam tshuam thiab cuam tshuam thaum tuav, kev thauj mus los, lossis nyob rau hauv huab cua huab cua.
5. Hardness
Txhais: Cov khoom tsis kam rau indentation lossis khawb.
Ntau Yam: 150 txog 250 HB (Brinell Hardness).
Qhov tseem ceeb: Hardness muaj feem xyuam rau cov yeeb nkab tsis kam hnav thiab corrosion. Cov hardness siab dua feem ntau sib raug rau qhov zoo ntawm qhov chaw durability.
6. Khoov zog
Txhais: Cov yeeb nkab muaj peev xwm tiv thaiv kev khoov thaum muaj kev ntxhov siab.
Hom Ntau Yam: Nyob ntawm cov yeeb nkab txoj kab uas hla thiab phab ntsa thickness.
Qhov tseem ceeb: Lub zog khoov yog qhov tseem ceeb rau kev teeb tsa hauv thaj chaw uas cov yeeb nkab yuav muaj kev khoov lossis nkhaus.
7. Kev qaug zog
Lus Txhais: Cov khoom muaj peev xwm tiv taus cyclic loading lub sij hawm tsis ua hauj lwm.
Qhov tseem ceeb: SSAW steel kav yog tsim los tiv thaiv kev qaug zog nyob rau hauv cov kev hloov pauv, uas yog ib qho tseem ceeb rau cov kev siv xws li cov kav dej uas muaj qhov sib txawv ntawm qhov sib txawv hauv qhov siab.
8. Corrosion Resistance
Qhov tseem ceeb: Txawm hais tias tsis nruj me ntsis cov cuab yeej cuab tam, kev tiv thaiv corrosion yog ib qho tseem ceeb ntawm SSAW steel kav, tshwj xeeb tshaj yog thaum raug rau ib puag ncig hnyav xws li underground lossis marine installation.
Cov cuab yeej cuab tam ntawm SSAW steel kav yog optimized raws li cov txheej txheem tsim thiab xaiv steel. Cov qib steel, nrog rau cov txheej txheem ntawm vuam thiab kev kho cua sov, cuam tshuam rau cov khoom kawg, ua kom muaj kev tswj xyuas qhov tseem ceeb los xyuas kom meej qhov kev ua tau zoo ntawm cov kav dej hauv lawv cov kev xav tau.
