Kev xaiv cov khoom siv square tube yuav tsum muaj kev txiav txim siab raws li kev thov tshwj xeeb thiab cov kev xav tau ntawm kev ua haujlwm. Cov khoom siv siab tshaj -cov ntaub ntawv zoo muaj xws li qis- alloy siab- lub zog steel (xws li Q355B, Q390, Q550), stainless hlau (xws li 304, 316L), thiab huab cua steel. Cov hauv qab no yog ib qho kev ntsuam xyuas ntxaws:
I. Tsawg- alloy siab- lub zog steel: Thawj qhov kev xaiv rau cov khoom siv thauj khoom-cov kabmob.
Cov khoom siv: Q355B, Q390, Q550, thiab lwm yam.
Kev ua tau zoo zoo:
Lub zog siab: Lub zog muaj zog nce mus txog 355MPa (xws li Q355B), deb tshaj li cov pa roj carbon zoo tib yam (Q235B lub zog tawm los yog 235MPa), txo cov khoom siv thiab cov khoom hnyav.
Zoo toughness: Tsis yooj yim nkig nyob rau hauv qis kub los yog cuam tshuam loads, haum rau dynamic load- bearing scenarios xws li txuas hniav thiab lub tsev steel lug.
Weldability zoo heev: Optimized alloy element ratios txo qhov tshwm sim ntawm cov kab nrib pleb tom qab vuam, yooj yim rau ntawm - qhov chaw ua.
Application Scenario:
I. Stainless hlau:
I. Stainless hlau:
Cov qauv yuav tsum tau ua ntev - lub sij hawm tiv thaiv cua thiab daus loads:
Cov qauv yuav tsum tau ua ntev - lub sij hawm tiv thaiv cua thiab daus loads:
I. Stainless hlau:
I. Stainless hlau:
Yam khoom siv:
304, 316L, 316Ti, thiab lwm yam.
Kev Ua Haujlwm Zoo:
Zoo heev Corrosion Resistance:
316L muaj molybdenum, muab kev tiv thaiv zoo rau pitting corrosion nyob rau hauv chloride ion ib puag ncig (xws li cov ntug hiav txwv dej thiab tshuaj lom neeg kev lag luam).
Kev zoo nkauj:
Qhov saum npoo tuaj yeem polished, txhuam, lossis plated, tso cai siv ncaj qha rau hauv cov ntawv thov zoo nkauj yam tsis muaj txheej txheej ntxiv.
Yooj yim ntxuav:
Lub ntsej muag du tsis yooj yim sau cov plua plav, haum rau cov ntawv thov kev nyiam huv xws li cov khoom noj khoom haus thiab cov khoom siv kho mob.
Application Scenario:
Khoom noj khoom haus, tshuaj machinery;
Lub tsev ntaub thaiv phab ntsa, sab hauv thiab sab nrauv kho kom zoo nkauj railings;
Marine engineering, chemical pipelines, thiab lwm yam corrosive ib puag ncig.
I. Weathering Steel:
Kev xaiv nyiaj txiag rau lub sijhawm ntev - Siv sab nraum zoov:
Yam khoom siv:
Q355NH, Q460NH, thiab lwm yam. Kev Ua Tau Zoo:
Natural Weather Resistance: By adding elements such as copper and phosphorus, a dense oxide film forms on the surface, resisting atmospheric corrosion without the need for painting, resulting in a lifespan 2-8 times longer than ordinary steel.
Tus nqi-Kev ua tau zoo: Txuag ntawm cov nqi pleev xim thiab kev saib xyuas tom qab, ua rau cov nqi qis dua tag nrho.
Application Scenario:
Sab nraum zoov sculptures, toj roob hauv pes chaw;
tsheb ciav hlau, thawv;
Cov choj, cov kav hlau txuas txuas, thiab lwm cov qauv raug cuam tshuam rau ib puag ncig ntuj.
IV. Cov ntsiab cai tseem ceeb rau kev xaiv cov khoom
Load-Cov Lus Cog Tseg:
Dynamic loads lossis loj - ncua cov qauv → Ua ntej Q355B thiab qib siab zog;
Static loads lossis cov qauv me me → Q235B tuaj yeem ua tau raws li qhov yuav tsum tau ua.
Corrosive Environments:
Cov av noo, ntsev tsuag ib puag ncig → 316L stainless hlau los yog weathering hlau;
Qhuav sab hauv ib puag ncig → Ordinary carbon steel los yog 304 stainless hlau.
Kev Ua Haujlwm thiab Cov Nqi:
Vuam thiab txiav yuav tsum tau → Xaiv qis- alloy steel nrog zoo weldability;
Kev siv nyiaj tsawg thiab tsis muaj qhov tshwj xeeb → Cov pa roj carbon zoo tib yam (xws li Q195, Q235). V. Kev Tshawb Fawb Kev Lag Luam
Wuxi Hushang Hlau: Muaj ntau yam khoom siv los ntawm Q195 txog Q700, txhawb kev hloov kho uas tsis yog- tus qauv hla- ntu (xws li P- hom thiab D- hom raj) kom tau raws li cov kev xav tau tshwj xeeb xws li ntau - theem chaw nres tsheb thiab lub hnub ci vaj huam sib luag mounting systems.
Loj -scale infrastructure tej yaam num: Lub Hong Kong-Zhuhai-Macau Choj siv Q390 siab- lub zog steel square raj, ntsuas lub zog thiab kav ntev; cov ntaub thaiv phab ntsa keel ntawm Shanghai Ntauwd siv 304 stainless hlau square raj kom paub meej ntev -lub sij hawm zoo nkauj thiab kev nyab xeeb.
