Puas yog S275JR Structural Tube Kub Rolled?
Cov lus teb luv luv yog tias cov hlau nws tus kheej raug xa tawm kub dov, thaum lub raj feem ntau yog txias - tsim los ntawm kub - dov strip. S275JR yog ib qho uas tsis yog- alloy structural steel tau teev tseg hauv EN 10025-2, thiab cov txheej txheem xa khoom ntawm daim ntawv khoom yog kub dov: lub sawb, phaj lossis ntu yog txias ncaj qha tom qab dov ntawm qhov kub thiab txias thiab siv rau hauv qhov xwm txheej rau feem ntau ntawm cov qauv siv. Tsis muaj kev kho cua sov yuav tsum ncav cuag cov khoom tshwj xeeb, uas ua rau tus nqi qis thiab cov kev tsim khoom yooj yim.
Thaum S275JR tau ua rau hauv lub voj voog lossis lub voj voos hollow seem raj, muaj ob txoj hauv kev. Qhov ntau tshaj plaws yog txias forming: kub-rolled strip yog slit mus rau dav, yob- ua rau lub hollow profile ntawm ambient kub, thiab seam yog kaw los ntawm high- zaus hluav taws xob- tsis kam vuam. Txoj kev thib ob yog kub ua tiav rau EN 10210-1, qhov chaw uas tau tsim thiab ua tiav ntawm qhov kub siab. Yog li cov txheej txheem raj xaj raws li S275JR feem ntau yog txias- tsim, siab- zaus-welded cov khoom uas nws cov khoom noj yog kub-dov hlau.
Kev Tsim Khoom
Txias -Formed Welded Tube (EN 10219-1)
Lub sawb yog uncoiled, leveled thiab txiav mus rau qhov dav dav rau seem uas xav tau. Tom qab ntawd nws yog dov mus zuj zus- ua rau hauv ib lub xwmfab lossis duab plaub, thiab qhib seam raug kaw los ntawm siab - zaus vuam, uas fuses cov npoo tsis muaj cov hlau muab tub lim. Lub weld hlaws yog trimmed sab hauv thiab sab nraud, lub raj yog qhov loj me nyob rau hauv lub calibration sawv ntsug, straightened, thiab txiav kom ntev. Txoj kev no muab qhov tseeb qhov ntev, qhov chaw du thiab cov khoom tsim tau siab, thiab nws yog lub neej ntawd rau S275JR hollow seem hauv tsev thiab tshuab ua haujlwm.
Kub-Tiav Tube (EN 10210-1)
Cov seem yog tsim los ntawm qhov kub siab, los ntawm kub -rolled strip los yog los ntawm ib tug tsis tu ncua welded hollow preform, thiab yog tiav los ntawm kub sizing. Kub-cov seem tiav muaj qhov sib txawv ntawm lub kaum sab xis thiab cov khoom seem sib txawv me ntsis los ntawm cov khoom txias- cov seem tsim, thiab lawv tau teev tseg thaum tus qauv tsim lossis kev coj ua hauv zos yuav tsum tau kub- cov khoom tiav.
Kev Tswj Xyuas Kev Tswj Xyuas Kev Tswj Xyuas Kev Tswj Xyuas Kev Ua Haujlwm Zoo
Kev tshuaj xyuas cov khoom siv raw: cov khoom xa tuaj raug kuaj xyuas cov ntaub ntawv pov thawj kom paub meej tias cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob sib raug rau S275JR. Kev tswj kev sib sau: yob cov chaw raug hloov kho kom tus ntoo khaub lig-section duab, sab qhov ntev thiab kaum radii nyob rau hauv chav kawm kam rau ua EN 10219-1. Vuam tswj: vuam tam sim no thiab kab ceev tau saib xyuas kom cov seam muaj tag nrho cov nkag thiab tsis qhib los yog txias welds. Kev kuaj xyuas tiav: lub raj yog straightened, lub weld flash yog trimmed, thiab saum npoo yog soj ntsuam rau cov kab nrib pleb, folds, laminations los yog tuav puas. Kev ntsuam xyuas zaum kawg: txhua qhov ntau lawm yog ua qauv rau kev ntsuas tensile thiab flattening, thiab qhov ntev thiab qhov ncaj raug txheeb xyuas raws li kev ua qauv, kom txhua pawg tso tawm ua raws li tus qauv txiav txim.
Mechanical Properties ntawm lub raj tiav
| Khoom | Tus nqi (piv txwv li, t<= 16 mm) |
|---|---|
| Yam tsawg kawg yield zog | 275 MPa rau |
| Tensile zog | 430 - 580 MPa (cov qauv ntu) / 410 - 560 MPa (phaj) |
| Tsawg kawg elongation | 14 - 22 % nyob ntawm daim ntawv khoom |
| Kev cuam tshuam lub zog ntawm 20 ° C, min | 27 J |
Yield zog nqis nqis nrog thickness: tsawg kawg yog 265 MPa rau 16 - 40 hli thiab 255 MPa rau 40 - 63 hli, yog li tus tsim yuav tsum siv tus nqi rau qhov tseeb phab ntsa thickness. Cov pa roj carbon sib npaug ntawm S275JR yog qis (txog 0.40 max rau cov tuab tuab), uas ua rau tawg rhiab heev thaum vuam thiab tso cai rau kev sib txuas bolted, riveted thiab welded yam tsis muaj kev ceev faj tshwj xeeb hauv feem ntau.
Machining thiab Fabrication
S275JR raj txhawb nqa laser txiav, sawing, drilling, khoov thiab dov. Kev kho cua sov xws li normalizing lossis tempering tuaj yeem siv tau yog tias yuav tsum muaj qhov tshwj xeeb microstructure. Qhov zoo ntawm qhov chaw yog tswj kom cov kab nrib pleb, folds thiab lwm yam tsis xws luag raug tso tseg ntawm lub zeb; qhov twg cov chav kawm saum npoo siab dua yog xav tau rau kev nthuav dav architecture, qhia meej meej vim tias cov khoom siv txheem zam me me qhov tsis zoo.
Yuav Qhia Li Cas Txog Kev Xa Khoom
Rau feem ntau ntawm cov qauv siv, xaj S275JR hollow seem rau EN 10219-1 nyob rau hauv txias- tsim welded mob nrog kub- dov feedstock, thiab thov EN 10204 3.1 daim ntawv pov thawj zeb rau traceability. Yog tias qhov kev qhia tshwj xeeb hu rau qhov kub- ntu tiav, xaj rau EN 10210-1 thiab lees paub lub kaum sab xis profile thiab cov khoom seem nrog tus tsim qauv, vim tias ob tsev neeg muaj qhov sib txawv ntawm ntu moduli thiab tsis tuaj yeem hloov pauv dawb yam tsis muaj kev kuaj xyuas. Rau cov qauv welded, paub meej tias qhov yuav tsum tau muaj qhov ntsuas kub: JR yog 20 ° C, J0 yog 0 ° C thiab J2 yog -20 ° C.
Cov lus nug nquag
Puas yog S275JR ib txwm kub dov?
Lub hauv paus hlau yog xa kub dov nyob rau hauv yuav luag txhua rooj plaub, uas yog tus qauv kev lag luam. Lub raj ua los ntawm nws feem ntau yog txias- tsim thiab siab - zaus welded, thaum kub- tiav hollow seem ib EN 10210-1 yog lwm txoj kev. Tsis muaj txoj hauv kev no yuav tsum muaj kev kho cua sov cais kom tau raws li qib.
Dab tsi yog qhov txawv ntawm qhov txias - tsim thiab kub - tiav S275JR raj?
Txias-formed welded raj (EN 10219-1) yog yob- ua los ntawm sawb ntawm ambient kub thiab seam-welded; nws muaj cov ces kaum ntse, nruj tolerances thiab ib tug du nto. Kub-tiav tube (EN 10210-1) yog tsim ntawm qhov kub thiab txias thiab muaj lub kaum sab xis sib txawv thiab cov khoom sib txawv me ntsis. Qhov kev xaiv yog ib txwm dictated los ntawm tus tsim specification.
Puas yog qhov weld seam tsis muaj zog rau lub raj square?
Tsis yog, thaum lub raj yog tsim thiab kuaj rau tus qauv. Lub siab - zaus weld yog tsim los ntawm lub hauv paus sawb nws tus kheej, thiab lub raj dhau los ntawm flattening thiab tensile xeem uas ua pov thawj lub seam. Qhov chaw weld yog, txawm li cas los xij, thaj chaw kuaj xyuas thawj zaug hauv kev pabcuam.
S275JR raj puas siv tau yam tsis tau pleev xim?
Sab nraum zoov, tsis muaj. S275JR yog carbon steel thiab yuav xeb thaum raug huab cua. Nws yuav tsum tau pleev xim rau, galvanized los yog lwm yam kev tiv thaiv. Hauv tsev nyob rau hauv ib puag ncig qhuav nws tuaj yeem tso tseg li - dov yog tias pom pom.
Daim ntawv pov thawj 3.1 zeb muaj dab tsi?
Daim ntawv pov thawj EN 10204 3.1 yog muab los ntawm cov chaw tsim khoom thiab lees paub tias cov khoom xa tuaj raws li qhov kev txiav txim, nrog rau cov xov tooj cua sov, tshuaj ntsuam xyuas, cov txiaj ntsig kev ntsuas tshuab, qhov ntev thiab qhov ntau. Nws yog cov ntaub ntawv tshuaj xyuas tus qauv rau cov qauv hlau nrog cov kev cai traceability.
Puas yuav tsum tau preheat thaum vuam S275JR raj?
Rau cov phab ntsa tuab txog li 20 hli, tsis xav tau preheat vim tias cov pa roj carbon sib npaug tsawg. Rau cov phab ntsa tuab, cov pob qij txha nruj heev los yog qhov kub thiab txias, qhov me me preheat ntawm 50 - 100 deg C yog kev xyaum zoo thiab yuav tsum tau them los ntawm cov txheej txheem vuam tsim nyog.