Corten Steel (weathering steel) yog siv dav hauv kev tsim kho, txuas hniav, kev thauj mus los thiab lwm yam haujlwm vim nws tus kheej zoo heev - kev tiv thaiv kev ua haujlwm. Txawm li cas los xij, cov qauv thoob ntiaj teb sib txawv tau tsim cov qib sib txawv ntawm Corten Steel, ntawm cov ASTM A588 (American standard), EN 10025-5 S355J2W (European standard) thiab GB / T 4171 Q355NH (Suav txheem) yog qhov tseem ceeb tshaj plaws. Qhov sib txawv ntawm cov khoom siv kho tshuab (yield zog, cuam tshuam toughness) thiab corrosion kuj ntawm cov qib no ncaj qha cuam tshuam rau qhov project xaiv, kev pab cuam lub neej thiab kev tswj tus nqi. Tsab ntawv xov xwm no yuav muab piv rau cov ntsiab lus tseem ceeb ntawm kev ua tau zoo los muab cov lus qhia meej rau cov neeg siv khoom txawv teb chaws.
Mechanical Properties ntawm Qib A588
| QIB | TUB NTXHAIS | TENSILE KSI | YIELD KSI | % YOG. MIN | |
| 8" | 2" | ||||
| A588 | .75 "THAU 4" | 70 MIN | 50 YP MIN | 16 | 19 |
| >4 "TAU 4" | 67 MIN | 46 PAB MIN | - | ||
| >5 "TAU 8" | 63 MIN | 42 PAB MIN | |||
Mechanical Properties ntawm S355J2W + N Phaj
|
Yield zog |
Tensile zog |
Tsawg kawg Elongation A (Lo=5.65 vSo) % |
|
355 MPa rau |
510 - 680 MPa |
20 |
Mechanical Properties ntawmqw 355n
| Qib | Q355NH cov cuab yeej cuab tam | |||
| Yield zog (MPa) | Tensile zog (MPa) | % Elongation min | ||
| Tuam Tshoj GB/T 4171 Q355NH | 325-355 | 490-630 | 20 | |
1. Kev sib piv ntawm cov cuab yeej cuab tam
Cov cuab yeej siv tshuab yog qhov yooj yim lav rau kev nyab xeeb ntawm cov qauv ntawm Corten Steel, thiab cov cim tseem ceeb suav nrog cov khoom muaj zog (qhov kev ntxhov siab yam tsawg kawg nkaus uas cov khoom tuaj yeem tiv taus yam tsis muaj deformation mus tas li) thiab cuam tshuam rau cov tawv nqaij (lub peev xwm los tiv thaiv kev puas tsuaj nyob rau hauv dheev load). Cov hauv qab no yog cov ncauj lus kom ntxaws sib piv ntawm peb qib:
1.1 Yield zog
Lub zog tawm los txiav txim siab qhov load -cov kabmob muaj peev xwm ntawm Corten Steel Cheebtsam. Peb qib tag nrho yog nyob rau nruab nrab thiab siab - lub zog Corten Steel, tab sis muaj qhov sib txawv me ntsis ntawm qhov tsawg kawg nkaus qhov yuav tsum tau muaj zog:
ASTM A588 (American Txuj): Qhov tsawg kawg nkaus tawm lub zog yog ntau dua los yog sib npaug rau 345 MPa (50 ksi). Nws tau muab faib ua ntau yam sub-qib (xws li Gr.A, Gr.K), thiab cov kev xav tau ntawm lub zog ntawm cov sub- qib sib txawv, feem ntau sib txawv hauv cov ntsiab lus tsis huv thiab cov khoom ua kom zoo (xws li Gr.K muaj Nb / V los txhim kho cov qauv nplej).
TS EN 10025-5 S355J2W (European Standard): Qhov tsawg kawg nkaus yield zog yog ntau dua los yog sib npaug rau 355 MPa, uas yog 10 MPa siab dua A588. Lub "355" nyob rau hauv qib ncaj qha sawv cev rau qhov tsawg kawg nkaus yield zog tus nqi, thiab tus qauv muaj nruj tswj nyob rau hauv lub fluctuation ntau yam ntawm yield zog los xyuas kom meej stability ntawm cov qauv bearing muaj peev xwm.
GB / T 4171 Q355NH (Suav Txuj): Qhov tsawg kawg nkaus yield zog yog ntau dua los yog sib npaug rau 355 MPa, uas yog tib yam li S355J2W. Piv nrog rau cov qub version ntawm Q345NH, lub zog tawm los tau nce los ntawm 10 MPa, thiab tag nrho cov neeg kho tshuab kev ua tau zoo yog ua raws li cov qauv thoob ntiaj teb.
1.2 Impact Toughness
Kev cuam tshuam hnyav yog qhov tseem ceeb tshwj xeeb rau cov haujlwm hauv qhov chaw qis - qhov kub thiab txias, raws li nws txiav txim siab cov khoom siv tiv thaiv kom tawg tawg. Peb qib muaj qhov sib txawv ntawm qhov ntsuas kub thiab qhov cuam tshuam rau lub zog:
ASTM A588 Cov Lus Qhia Tshwj Xeeb: Tus qauv yuav tsum muaj kev ntsuam xyuas qhov cuam tshuam ntawm 0℃, thiab qhov cuam tshuam tsawg kawg yog ntau dua lossis sib npaug li 27 J. Rau cov haujlwm hauv cheeb tsam txias dua (xws li -20℃), siab -toughness sub- qib yuav tsum tau kho, thiab qib siab tsis tsim nyog rau qhov kub thiab txias.
EN 10025-5 S355J2W: Qhov "J2" nyob rau hauv qib qhia tias qhov kev ntsuam xyuas cuam tshuam tau ua tiav ntawm -20℃, thiab qhov cuam tshuam tsawg kawg nkaus lub zog yog ntau dua lossis sib npaug li 27 J. Nws muaj qhov kub thiab txias zoo dua li A588 qib default thiab haum rau feem ntau temperate thiab txias cheeb tsam hauv Europe.
GB/T 4171 Q355NH: Tus qauv yuav tsum muaj kev ntsuam xyuas cuam tshuam ntawm -20℃, thiab qhov cuam tshuam tsawg kawg nkaus lub zog yog Ntau dua lossis sib npaug rau 34 J, uas siab dua A588 thiab S355J2W. Nws muaj qhov ua tau zoo heev - qhov kub thiab txias thiab tshwj xeeb tshaj yog tsim rau cov haujlwm hauv cov cheeb tsam txias xws li sab qaum teb Tuam Tshoj.
2. Kev sib piv ntawm Corrosion Resistance
Kev tiv thaiv corrosion ntawm Corten Steel feem ntau yog nyob ntawm hom thiab cov ntsiab lus ntawm cov ntsiab lus alloying (Cu, Cr, Ni, P, thiab lwm yam), uas sib koom ua ke txhawb kev tsim ntawm tuab -FeOOH tiv thaiv xeb txheej. Qhov sib txawv ntawm corrosion kuj ntawm peb qib yog reflected nyob rau hauv lub alloying ntsiab configuration thiab corrosion kuj Performance index:
2.1 Alloying Element Composition
ASTM A588 Cov Lus Qhia Tshwj Xeeb: Nws belongs rau Cu-Cr-Ni alloy system, nrog Cu cov ntsiab lus ntawm 0.25-0.40%, Cr ntsiab lus ntawm 0.40-0.65%, thiab Ni cov ntsiab lus tsawg dua lossis sib npaug li 0.40%. Cov ntsiab lus phosphorus (P) yog tswj nruj me ntsis (tsawg dua los yog sib npaug rau 0.03%), uas yog qhov tseem ceeb ntawm kev ua haujlwm vuam thaum ua kom muaj kev tiv thaiv corrosion. Nws yog "tsawg-phosphorus hom" Corten Steel.
EN 10025-5 S355J2W: Tus qauv qhia meej tias tag nrho cov ntsiab lus ntawm Cu + Cr + Ni Ntau dua lossis sib npaug li 0.80%, nrog Cu cov ntsiab lus ntawm 0.20-0.50%, Cr ntsiab lus ntawm 0.30-1.20%, thiab Ni cov ntsiab lus tsawg dua lossis sib npaug li 0.65%. Nws tuaj yeem hloov kho rau hauv "high-phosphorus type" (S355J0WP, P cov ntsiab lus 0.06-0.15%) raws li kev xav tau, thiab hom high-phosphorus muaj kev tiv thaiv corrosion zoo dua tab sis txo qis vuam kev ua tau zoo.
GB/T 4171 Q355NH: Nws txais cov Cu-Cr-Ni alloy system, nrog Cu ntsiab lus ntawm 0.25-0.55%, Cr ntsiab lus ntawm 0.40-0.80%, thiab Ni cov ntsiab lus tsawg dua lossis sib npaug li 0.65%. Tag nrho cov ntsiab lus ntawm Cu + Cr + Ni kuj tseem ntau dua lossis sib npaug rau 0.80%, uas yog raws li S355J2W. Nws muaj ob hom: hom zoo tib yam (P Tsawg dua lossis sib npaug rau 0.03%) thiab hom huab cua tsis zoo (Q355GNH, P 0.07-0.15%), npog qhov sib txawv corrosion ib puag ncig xav tau.
2.2 Corrosion Resistance Performance
ASTM A588 Cov Lus Qhia Tshwj Xeeb: Qhov ntsuas huab cua tsis kam (I) Ntau dua lossis sib npaug rau 6.0, thiab txhua xyoo corrosion tus nqi hauv kev lag luam thiab nyob deb nroog yog 0.015-0.025 mm / xyoo. Nws yog haum rau nruab nrab- ib puag ncig corrosion, thiab pab tiv thaiv kev tiv thaiv- kev ntsuas corrosion (xws li silane impregnation) yuav tsum tau ntxiv rau hauv siab - ntsev-txhaj tshuaj ntawm ntug dej hiav txwv.
EN 10025-5 S355J2W: Cov huab cua tiv thaiv qhov ntsuas (I) Ntau dua lossis sib npaug rau 6.0, thiab siab -phosphorus hom (S355J0WP) muaj huab cua tiv thaiv qhov ntsuas siab dua lossis sib npaug rau 7.0. Tus nqi corrosion txhua xyoo nyob rau hauv nruab nrab-corrosion ib puag ncig yog 0.010-0.020 mm / xyoo, uas yog me ntsis zoo dua A588. S355J2W (H) qib kawm tshwj xeeb uas tsim los rau kev tsheb nqaj hlau txuas hniav muaj zog tiv thaiv chloride ion corrosion.
GB/T 4171 Q355NH: Qhov ntsuas huab cua tsis kam (I) Ntau dua lossis sib npaug rau 6.0, thiab siab - huab cua tiv thaiv hom Q355GNH muaj qhov ntsuas huab cua tiv thaiv ntau dua lossis sib npaug rau 7.0. Nws cov corrosion kuj yog sib npaug ntawm S355J2W, thiab txhua xyoo corrosion yog 0.010-0.020 hli / xyoo. Piv nrog rau lwm qib ob, nws muaj cov txiaj ntsig zoo (15-20% qis dua A588 thiab S355J2W).
3. Cov lus qhia txog kev xaiv cov ntsiab lus
Txhawm rau suav nrog, qhov sib txawv ntawm qhov tseem ceeb ntawm peb qib Corten Steel yog raws li hauv qab no: Hais txog cov khoom siv kho tshuab, S355J2W thiab Q355NH muaj zog yield zog ntau dua A588, thiab Q355NH muaj qhov zoo tshaj plaws qis-kub qhov toughness; nyob rau hauv cov nqe lus ntawm corrosion kuj, S355J2W thiab Q355GNH (siab- huab cua tsis kam hom) zoo dua A588, thiab Q355NH muaj cov nqi siab tshaj plaws.
Rau cov neeg siv khoom txawv teb chaws, cov lus qhia xaiv hauv qab no yog muab raws li qhov kev xav tau sib txawv:
Yog tias qhov haujlwm no nyob hauv North America thiab xav tau ua raws li cov qauv hauv zos, lossis ua qhov tseem ceeb ntawm kev ua haujlwm vuam hauv nruab nrab -ib puag ncig corrosion,ASTM A588 Cov Lus Qhia Tshwj Xeebpom zoo;
Yog tias qhov project yog nyob rau hauv Tebchaws Europe, lossis yuav tsum tau siv nyob rau hauv qis - kub (-20 degree) thiab nruab nrab-siab corrosion ib puag ncig, thiab muaj kev xav tau siab rau kev ua haujlwm ruaj khov,EN 10025-5 S355J2Wpom zoo; rau qhov siab -corrosion ib puag ncig xws li thaj chaw ntug dej hiav txwv, S355J0WP (siab- hom phosphorus) tuaj yeem xaiv tau;
Yog tias qhov project nrhiav cov nqi ua haujlwm, lossis xav kom sib npaug ntawm lub zog siab, qis -kub toughness thiab corrosion kuj,GB/T 4171 Q355NHpom zoo; rau siab - ib puag ncig corrosion, Q355GNH (siab- huab cua tiv thaiv hom) tuaj yeem sib phim.
