Bolts yog cov khoom siv kho vajtse tshaj plaws hauv peb lub neej niaj hnub thiab ua lub luag haujlwm tseem ceeb hauv peb lub neej.Txawm li cas los xij, ntau tus neeg tsis nkag siab qhov tshwj xeeb thiab qhov loj ntawm bolts.Niaj hnub no, peb yuav muab koj ib tug scientific kev taw qhia rau qhov tseeb sawv cev ntawm thauj tog rau nkoj bolts, vam tias yuav pab tau koj.
1. Foundation bolt khoom xaiv
Feem ntau hais lus, cov khoom ntawm lub thauj tog rau nkoj ntsia liaj qhov rooj yuav tsum yog Q235.Yog tias lub zog tsis txaus, 16Mn thauj tog rau nkoj ntsia liaj qhov rooj tuaj yeem xaiv los ntawm kev suav.Feem ntau, Q235 thauj tog rau nkoj ntsia liaj qhov rooj yog siv, thiab lub ntsia liaj qhov rooj yog tensile thiab rub tawm resistant.
Raws li qhov tseeb, cov thauj tog rau nkoj bolts yuav tsis ua lub luag haujlwm tseem ceeb hauv cov qauv hlau ntsia.Tsuas yog ib feem ntawm lub zog shear muaj nyob, vim tias lub luag haujlwm tseem ceeb yog txhawb nqa tom qab kev teeb tsa, yog li cov lus qhia tshwj xeeb yuav tsum raug xa mus rau thaum xaiv thauj tog rau nkoj bolts.Qhov tseeb, peb feem ntau tsuas yog siv Q235B lossis Q235A, thiab feem ntau tsis siv Q345 nuv, nrog qhov ntev tsis pub tsawg tshaj 150mm.
Thauj tog rau nkoj bolts: lawv tuaj yeem muab faib ua cov khoom siv thauj tog rau nkoj thiab cov qauv thauj tog rau nkoj bolts.Kev xaiv ntawm thauj tog rau nkoj bolts yuav tsum tau txiav txim siab los ntawm qhov kev xav ntawm kev ntxhov siab, uas yog, shear, tensile thiab torsional rog yug los ntawm kev txhawb nqa bolts.Nyob rau tib lub sij hawm, raws li lub thauj tog rau nkoj bolts, lawv yuav tsum mas dais lub shear quab yuam.Yog li ntawd, Q235 (tseem xav txog qhov kub ntawm ib puag ncig kom tsis txhob "xiav brittleness") yuav tsum tau xaiv nyob rau hauv feem ntau.Thaum cov tuam tsev, cov qauv lossis cov cuab yeej kho los ntawm lub hauv paus thauj tog rau nkoj bolts muaj qhov nro los yog torsion ntawm lub thauj tog rau nkoj bolts, lub qub yuav tsum tau xam thiab xaiv nrog txoj kab uas hla los yog ncaj qha xaiv 16Mn nrog lub zog tensile siab, thiab tom kawg yuav tsum tau daws los ntawm kev nce lub tus naj npawb ntawm thauj tog rau nkoj bolts.Tom qab tag nrho, cov ntaub ntawv yog kim tam sim no.
Nws yog qhov zoo dua los siv Q235A.Q235B yog kim dua Q235A.Lub thauj tog rau nkoj bolts tsis tas yuav tsum tau welded, yog li nws yog OK siv Qib A.
2. Kev siv thev naus laus zis ntawm lub hauv paus bolt khoom
Cov txheej txheem ntawm thauj tog rau nkoj ntsia liaj qhov rooj: tig cov xov ua ntej, tom qab ntawd khoov tus nuv, thiab hla ib Q235 nrog tib cov khoom ntev ntawm 150mm nyob ze ntawm tus nuv.Tsis tas li ntawd, nws yuav tsum raug sau tseg tias A3 yog lub npe qub qub, thiab tam sim no nws sib raug rau Q235A.A3 steel, uas yog lub npe yav dhau los.Txawm hais tias nws tseem siv tau, nws txwv rau cov lus hais.Nws yog qhov zoo dua tsis siv nws hauv cov ntaub ntawv sau.Nws yog Class A steel.Cov chaw tsim khoom ntawm cov hlau no tsuas yog lav qhov kev ua tau zoo ntawm cov neeg kho tshuab tab sis tsis yog tshuaj lom neeg muaj pes tsawg leeg thaum tawm hauv lub Hoobkas, Yog li ntawd, cov khoom tsis huv xws li S thiab P yuav yog me ntsis ntxiv, thiab cov ntsiab lus carbon yog li 0.2%, roughly sib npaug rau. No. 20 steel, uas yog sib npaug rau Q235 hauv tus qauv tshiab.A3 thiab A3F yog cov npe qub ntawm Q235-A, Q235-A.F A3 steel thiab Q235, Q345 yog cov qib ntawm carbon structural steel.A3 yog qib steel hauv cov qauv qub, tab sis tus qauv tam sim no (GB221-79) tsis muaj qib zoo li no.
Hauv cov qauv tam sim no, A3 suav nrog Q235.Q235 sawv cev tias lub zog tawm los ntawm cov hlau no yog 235MPa.Ib yam li ntawd, 345 hauv Q345 tuaj yeem muab faib ua ntau pawg, suav nrog: A - kom ntseeg tau cov khoom siv kho tshuab, B - kom ntseeg tau cov khoom siv kho tshuab thiab cov khoom txias txias, C - kom ntseeg tau cov tshuaj muaj pes tsawg leeg... Hauv cov qauv qub, lub ntsiab lus ntawm A , B, C tsis txawv ntau npaum li cas hauv tus qauv tshiab (Kuv kwv yees qhov no yog qhov teeb meem), thiab 1, 2, 3...... Yog siv los qhia lub zog.1 sawv cev rau lub zog tawm los ntawm 195MPa, 2 sawv cev rau lub zog tawm los ntawm 215MPa, thiab 3 sawv cev rau lub zog tawm ntawm 235MPa.Yog li A3 sib npaug rau Q235A hauv lub npe tshiab.Tom qab tag nrho, A3 tau siv ua ntej, yog li ntau tus neeg siv nws, ib yam li lwm tus neeg siv cov units ntawm "jin, liang".Q235 yog cov khoom siv carbon steel.Piv nrog rau cov qauv qub GB700-79 qib, A3 thiab C3 Q345 yog cov hlau tsis tshua muaj hlau.Piv nrog rau cov qauv qub 1591-88 qib, muaj ntau yam khoom thiab kev siv ntawm 12MnV, 16Mn 16MnRE, 18Nb thiab 14MnNb Q345 - ncej thiab vuam muaj cov khoom siv zoo, tsis tshua muaj kub, zoo plasticity thiab weldability.Lawv yog siv los ua dynamic load bearing structures, mechanical parts, building structures, and general metal structures of medium and low pressure vessels, oil tanks, tsheb, cranes, mining machinery, fais fab nroj tsuag, txuas hniav, thiab lwm yam., thiab tuaj yeem siv rau hauv kub. dov los yog normalizing tej yam kev mob.Lawv tuaj yeem siv rau ntau yam qauv hauv cheeb tsam txias hauv qab - 40 ℃.
Post lub sij hawm: Sep-23-2022