Txoj hauj lwm ntawm ASTM A572 Qib 60 hauv Series
ASTM A572/A572M txhais tau hais tias cov qib siab -lub zog qis- alloy structural steels, thiab Qib 60 yog qib siab tshaj plaws uas ib txwm ua hauv kev lag luam kom muaj nuj nqis hauv cov koob ntawd. Nws lub npe yog hais txog qhov tsawg kawg nkaus tawm lub zog ntawm 60 ksi, kwv yees li 415 MPa, uas yog ntau tshaj 60% saum toj no cov qauv carbon steel. Lub zog yog ua tiav los ntawm kev sib xyaw ntawm microalloying nrog niobium thiab vanadium thiab los ntawm kev tswj dov xyaum, yog li qib muab lub zog siab yam tsis muaj qhov poob ntawm weldability uas cov ntsiab lus carbon siab yuav ua rau. Qhov twg cov khoom tau muab rau hauv tubular daim ntawv, cov yeeb nkab raug txiav txim rau cov yeeb nkab specification nrog A572 Qib 60 chemistry thiab cov khoom yuav tsum tau hais, thiab tus kws tsim qauv yuav tsum kho cov qib raws li cov khoom siv es tsis yog cov khoom siv yeeb nkab.
Kev sib xyaw ua ke thiab cov khoom siv tshuab
| Yam khoom | Yuav Tsum Tau Kawm Qib 60 |
|---|---|
| Cov pa roj carbon | 0.26% max |
| Manganese | 1.35% max |
| Phosphorus | 0.04% max |
| Sulfur | 0.05% max |
| Silicon | 0.40% max |
| Microalloying | Niobium 0.005 - 0.05% los yog vanadium 0.01 - 0.15%, ntxiv ib leeg lossis ua ke |
| Yield zog | 415 MPa (60 ksi) min |
| Tensile zog | 520 MPa (75 ksi) min |
| Elongation | 16% min ntawm 200 hli ntsuas qhov ntev rau cov thicknesses hauv cov qauv siv ntau |
Ob lub ntsiab lus tsim nyog saib xyuas thaum daim ntawv pov thawj raug tshuaj xyuas. Ua ntej, qhov yuav tsum tau elongation ntawm qib no yog qis dua qhov qis dua - qib zog hauv cov koob, uas yog qhov cuam tshuam ncaj qha ntawm qib siab zog thiab yuav tsum tau txiav txim siab thaum twg tus qauv siv los ntawm cov yas deformation. Thib ob, kev cuam tshuam qhov hnyav tsis tau txais ib feem ntawm qib: qhov twg qis - qhov kub thiab txias yuav tsum tau thauj khoom, Charpy V-qhov yuav tsum tau muaj qhov ntsuas qhov ntsuas kub thiab lub zog tsawg kawg nkaus yuav tsum suav nrog hauv qhov kev txiav txim, vim tias cov cuab yeej tsis tuaj yeem suav los ntawm cov txiaj ntsig tensile. Cov kev qhia tshwj xeeb kuj tseem muab rau kev kuaj xyuas ultrasonic ntawm phaj thaum qhov kev txiav txim hu rau nws, uas yog ib txwm thov rau hnyav loaded welded sib txuas.
Daim ntawv thov ntawm Qib 60 Tube thiab Tube
Ntev- txuas txuas txuas, cable- txhawb nqa cov qauv thiab cov tswv cuab truss hnyav heev.
Kem thiab hloov cov qauv hauv cov tsev siab, qhov twg lub zog - rau - qhov hnyav piv txo qis hauv paus.
Heavy machinery thav duab, xovxwm cov qauv thiab cov khoom siv tsuas yog lub cev.
High -voltage transmission towers thiab substation structures nqa hnyav dej khov lossis cua thauj khoom.
Chaw nres nkoj thiab offshore tuav khoom, loj crane booms thiab hnyav thauj thav duab.
Vuam, tsim thiab Fabrication Control
Vuam Qib 60 yuav tsum muaj cov txheej txheem tsim nyog es tsis yog khw muag khoom. Siv tsawg-hydrogen consumables matched rau lub hauv paus hlau lub zog, xws li ib tug E110 chav kawm electrode los yog ib tug ER110S chav kawm ntawv hlau qhov twg cov kev sib koom ua ke yog tsim los sib piv lub zog, thiab cia thiab tuav lawv raws li cov chaw tsim tshuaj paus cov lus qhia kom ya raws tsis qhia hydrogen rau hauv lub vuam. Preheat cov ntu tuab, feem ntau mus rau 150 mus rau 200℃thaum phab ntsa lossis flange thickness nce txog 25 hli, thiab tswj qhov kub ntawm qhov sib txawv ntawm qhov tsim nyog. Tswj cov cua sov kom zoo: cov cua sov- cuam tshuam cheeb tsam ntawm microalloyed steel ntawm qib no lub zog poob toughness yog hais tias nws yog overheated, thiab nws muaj peev xwm harden ntau tshaj yog hais tias ib tug heev muaj zog consumable yog siv nrog tsawg kawg nkaus tshav kub input ntawm ib tug tuab, restrained sib koom ua ke.
Kev ua txias txias yuav tsum txwv rau qhov dav dav khoov radii, ntawm qhov kev txiav txim ntawm tsib npaug ntawm cov yeeb nkab txoj kab uas hla lossis ntu qhov tob, vim tias cov qib siab muaj hnub nyoog thiab kev khoov nruj tuaj yeem txhim kho embrittlement hauv kev pabcuam. Qhov twg cov qauv yuav raug rau huab cua, qhia meej galvanizing lossis txheej txheej txheej tsim nyog rau ib puag ncig, thiab nco ntsoov tias cov tubular cov tswv cuab yuav tsum tau muab kaw los yog vented kom tsis txhob muaj kev cuam tshuam sab hauv. Rau qhov tseem ceeb welded kev sib txuas, pom zoo rau qib soj ntsuam ua ntej, npog ultrasonic lossis radiographic kuaj ntawm cov pob qij txha thiab cov qauv kev lees paub yuav tsum tau thov.
Cov teeb meem tshwm sim hauv kev xaiv thiab kev yuav khoom
Qhov yuam kev feem ntau yog kho cov qib A572 raws li kev hloov pauv tau. Qib 42, 50, 55 thiab 60 sib txawv ntawm lub zog tawm los, elongation thiab cov txheej txheem vuam uas lawv xav tau, thiab cov tswv cuab tsim hauv ib qib yuav tsis sib npaug hauv lwm qhov. Qhov kev pheej hmoo thib ob yog xav tias qib siab dua yuav txo tau tus nqi: tus nqi kom zoo dua yog nyob ntawm phab ntsa thickness tiag tiag xav tau, thiab ntawm cov vuam thiab tshuaj xyuas tus nqi uas lub zog siab dua tuaj. Thaum kawg, xyuas kom meej tias daim ntawv pov thawj qhia qhov tseeb qib, qhov sib ntxiv ntawm microalloying, thiab cov txiaj ntsig tensile nrog rau qhov elongation thiab qhov chaw sim, thiab tias lub cev kos npe ntawm txhua daim sib tw nrog daim ntawv pov thawj ua ntej kev tsim khoom pib.
FAQ
Q: Dab tsi yog qhov tsawg kawg nkaus tawm lub zog ntawm ASTM A572 Qib 60?
415 MPa, sib npaug rau 60 ksi. Qhov tsawg kawg nkaus tensile lub zog yog 520 MPa, thiab qhov tsawg kawg nkaus elongation yog 16% ntawm 200 hli ntsuas qhov ntev rau cov qauv thicknesses.
Q: Qib 60 txawv li qib 50 li cas?
Qib 60 muaj qhov tsawg kawg nkaus tawm lub zog ntawm 415 MPa tiv thaiv 345 MPa rau Qib 50, nrog rau kev sib raug zoo elongation yuav tsum tau thiab cov txheej txheem vuam xav tau ntau dua. Kev hloov pauv hauv ob qho kev taw qhia yuav tsum tau kuaj xyuas tus qauv.
Q: Puas yog qhov kev ntsuam xyuas cuam tshuam nrog rau qib?
Tsis yog. Kev ntsuas toughness yuav tsum tau teev raws li qhov yuav tsum tau ua ntxiv, nrog rau qhov ntsuas kub thiab lub zog tsawg kawg nkaus uas tsim nyog rau qhov kev pabcuam.
Q: Vim li cas qis - hydrogen vuam siv tau?
Vim tias hydrogen daig hauv qhov tuab, txwv tsis pub, siab - lub zog sib koom ua ke tuaj yeem ua rau ncua kev tawg. Tsawg-hydrogen consumables, raug cia thiab preheat yog tus qauv tswj.
Q: Qib 60 lub raj puas tuaj yeem txias khoov?
Nws tuaj yeem, nrog cov radii dav dav, feem ntau ntawm qhov kev txiav txim ntawm tsib npaug ntawm txoj kab uas hla. Tight radii yuav tsum tsim nyog los ntawm kev ntsuam xyuas, thiab ib feem yuav tsum tau soj ntsuam tom qab ntawd rau saum npoo tawg.
Q: Cov ntaub ntawv twg yuav tsum tau thov nrog kev xa khoom?
Daim ntawv pov thawj zeb xeem nrog tus lej xov tooj cua sov, chemistry nrog rau microalloying ntxiv, tensile thiab yield tau, elongation thiab xeem qhov chaw, ntxiv rau cov ntawv qhia ntxiv ntxiv thiab daim ntawv pov thawj soj ntsuam xav tau los ntawm qhov kev txiav txim.
