ASTM A139 S235 J0 Cov Kav Hlau Kauv
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawmS235 J0 kauv hlau yeeb nkabyog nws qhov kev hloov pauv ntawm txoj kab uas hla thiab phab ntsa tuab. Qhov no tso cai rau kev hloov pauv ntau dua ntawm kev tsim khoom, tshwj xeeb tshaj yog hauv kev tsim cov kav dej zoo, phab ntsa tuab. Tsis tas li ntawd, cov thev naus laus zis no muaj txiaj ntsig zoo rau kev tsim cov kav dej phab ntsa tuab ntawm txoj kab uas hla me thiab nruab nrab, ua tau zoo dua lwm txoj hauv kev uas twb muaj lawm.
Khoom Siv Kho Tshuab
| qib hlau | lub zog tsawg kawg nkaus Mpa | Lub zog tensile | Qhov ntev tsawg kawg nkaus % | Lub zog cuam tshuam tsawg kawg nkaus J | ||||
| Qhov tuab uas tau teev tseg mm | Qhov tuab uas tau teev tseg mm | Qhov tuab uas tau teev tseg mm | ntawm qhov kub thiab txias ntawm | |||||
| <16 | > 16≤40 | <3 | ≥3≤40 | ≤40 | -20 ℃ | 0℃ | 20 ℃ | |
| S235JRH | 235 | 225 | 360-510 | 360-510 | 24 | - | - | 27 |
| S275J0H | 275 | 265 | 430-580 | 410-560 | 20 | - | 27 | - |
| S275J2H | 27 | - | - | |||||
| S355J0H | 365 | 345 | 510-680 | 470-630 | 20 | - | 27 | - |
| S355J2H | 27 | - | - | |||||
| S355K2H | 40 | - | - | |||||
Cov Tshuaj Lom Zem
| Qib hlau | Hom de-oxidation a | % los ntawm pawg, siab tshaj plaws | ||||||
| Lub npe hlau | Tus lej hlau | C | C | Si | Mn | P | S | Nb |
| S235JRH | 1.0039 | FF | 0,17 | — | 1,40 | 0,040 | 0,040 | 0.009 |
| S275J0H | 1.0149 | FF | 0,20 | — | 1,50 | 0,035 | 0,035 | 0,009 |
| S275J2H | 1.0138 | FF | 0,20 | — | 1,50 | 0,030 | 0,030 | — |
| S355J0H | 1.0547 | FF | 0,22 | 0,55 | 1,60 | 0,035 | 0,035 | 0,009 |
| S355J2H | 1.0576 | FF | 0,22 | 0,55 | 1,60 | 0,030 | 0,030 | — |
| S355K2H | 1.0512 | FF | 0,22 | 0,55 | 1,60 | 0,030 | 0,030 | — |
| a. Txoj kev deoxidation yog raws li nram no:FF: Cov hlau tua tag nrho uas muaj cov khoom sib txuas nrog nitrogen hauv qhov ntau txaus los khi cov nitrogen uas muaj (piv txwv li tsawg kawg 0,020% tag nrho Al lossis 0,015% soluble Al).b. Tus nqi siab tshaj plaws rau nitrogen tsis siv yog tias cov tshuaj lom neeg qhia tias muaj tsawg kawg nkaus tag nrho Al cov ntsiab lus ntawm 0,020% nrog qhov tsawg kawg nkaus Al/N piv ntawm 2:1, lossis yog tias muaj lwm cov khoom sib txuas N-khi txaus. Cov khoom sib txuas N-khi yuav tsum tau sau tseg rau hauv Daim Ntawv Tshuaj Xyuas. | ||||||||
Cov yam ntxwv zoo ntawm S235 J0 kauv hlau yeeb nkab ua rau nws zoo tagnrho rau ntau yam kev siv. Txawm tias nws yog kev lag luam, kev lag luam lossis kev tsim kho vaj tse, cov khoom no yog tsim los ua kom tau raws li cov kev cai nruj ntawm nws cov neeg siv. Nws qhov kev ua tau zoo thiab kev ruaj khov ua rau nws yog qhov kev daws teeb meem pheej yig rau txhua qhov project uas xav tau cov kav dej kauv submerged arc.
Ntxiv rau S235 J0 kauv hlau yeeb nkab, peb cov kab khoom kuj suav nrogA252 Qib 3 yeeb nkab hlauCov khoom no yog tsim los ntawm kev siv cov thev naus laus zis tshiab tshaj plaws los xyuas kom meej tias cov qauv zoo tshaj plaws thiab kev ntseeg siab. Nrog nws lub zog tensile siab thiab kev tiv thaiv corrosion zoo heev, A252 Qib 3 steel yeeb nkab yog qhov zoo tagnrho rau cov ntawv thov uas xav tau.
Peb zoo siab los muab cov yeeb nkab uas muaj cov kauv sib txuas ua ke uas ua tau raws li thiab tshaj cov qauv kev lag luam. Peb txoj kev mob siab rau qhov zoo thiab kev tsim kho tshiab tau ua rau peb yog tus neeg muab khoom uas ntseeg siab rau kev lag luam yeeb nkab hlau. Nrog kev cog lus rau kev ua tau zoo tshaj plaws, peb txuas ntxiv thawb cov kev txwv ntawm kev tsim cov yeeb nkab hlau.
Thaum nws los txog rau cov yeeb nkab uas muab kauv rau hauv qab dej, peb cov khoom teeb tsa tus qauv rau kev ua tau zoo, kev ruaj khov thiab kev ntseeg siab. S235 J0 Cov Yeeb Nkab Hlau Muab Kauv thiab A252 Qib 3 Cov Yeeb Nkab Hlau tsuas yog ob qho piv txwv ntawm peb txoj kev cog lus los muab cov kev daws teeb meem zoo tshaj plaws rau peb cov neeg siv khoom. Peb tsom mus rau qhov zoo thiab kev tsim kho tshiab thiab cog lus tias yuav ua kom tau raws li peb cov neeg siv khoom xav tau thiab ua tau ntau tshaj qhov lawv xav tau.
Hauv kev xaus lus, peb cov yeeb nkab hlau S235 J0 thiab cov yeeb nkab hlau A252 qib 3 yog qhov tshwm sim ntawm kev siv tshuab tshiab thiab kev ua haujlwm zoo tshaj plaws. Cov khoom no muaj kev ua tau zoo tsis sib xws, ua rau lawv yog qhov kev xaiv zoo tshaj plaws rau ntau yam kev siv. Txawm hais tias nws yog kev tsim kho, kev tsim kho vaj tse lossis cov haujlwm lag luam, peb cov yeeb nkab hlau uas tau muab kauv submerged arc welded tau tsim los kom xa cov txiaj ntsig zoo tshaj plaws. Ntseeg siab tias peb qhov kev txawj ntse thiab kev paub dhau los yuav muab cov yeeb nkab hlau zoo tshaj plaws rau koj hauv kev ua lag luam.
