Yuav tsum muaj kev sim dab tsi rau ASTM A53 Gr.A cov kav dej steel ua ntej xa khoom?
Kev Kuaj Hoobkas suav nrog cov tshuaj ntsuam xyuas tshuaj lom neeg (cov txheej txheem ntub dej lossis kev kuaj ntshav (tawm los / tensile sim (brinell lossis rockwell). Ib qho kev sim hydrostatic yog qhov yuav tsum tau ua, nrog lub siab ntawm ntau dua lossis sib npaug rau 2.4 MPa thiab 5-thib ob tuav, kom tsis muaj xau. Seem ntsuam xyuas cov npog npog npog cov cheeb tsam hla, phab ntsa thickness, ntev, thiab ris. Cov khoom zoo yog pom tau pom tseeb kom ntseeg tau tias tsis muaj qhov tsis xws luag xws li cov kab nrib pleb thiab nti. Qee tus neeg muas zaub tuaj yeem thov kev sim ultrasonic ntxiv (U) lossis tshuaj ntsuam xyuas tam sim no (thiab).
ASTM A53 Gr.A cov yeeb nkab tsim nyog li cas?
Cov khoom lag luam tsim nyog yuav tsum ua kom tau raws li ASTM A53 tus qauv: Tshuaj lom neeg muaj pes tsawg lossis sib npaug los yog sib npaug thiab cov leej faj ntau dua lossis sib npaug nrog 0.05%. Cov cuab yeej kho tshuab yuav tsum muaj cov txiaj ntsig zoo dua lossis sib npaug nrog 205 MPa thiab lub tensile lub zog ntau dua lossis sib npaug ntawm 330 MPa. Tom qab cov hydrostatic kuaj, yeeb nkab lub cev yuav tsum muaj kev xau lossis deformation tas mus li. Cov khawb saum npoo los yog pits ntau dua 5% ntawm phab ntsa tuab yog txwv. Rau galvanized yeeb nkab, zinc txheej tuab yuav tsum muaj ntau dua los yog sib npaug rau 610 g / m² (raws li cov ATM A53 Daim Ntawv Ntxiv) Ntxiv).
Dab tsi yog qhov kev sim ua tsis tau zoo tshaj plaws rau Astm A53 Gr.A cov yeeb nkab steel?
Cov kev sim ua haujlwm ib txwm muaj xws li kev sim ultrasonic (rau, rau kev sim sab hauv (MT, rau cov khoom tawg sab hauv ferromagnetic cov ntaub ntawv). RadioGraphic Xeem (RT) feem ntau siv rau welds kuaj, tab sis yog tus nqi. Kev sim tshuaj ntsuam xyuas (PT) yog qhov haum rau tsis- peem tej yam tsis xws luag. Lub hau kev xaiv yuav tsum txiav txim siab raws li cov hom tsis zoo, yeeb nkab taub, thiab nyiaj txiag.
Cov khoom lag luam zoo li cas ntawm ASTM A53 Gr.a Yeeb Nkab Tswj Tau?
Kev tswjhwm zoo pib nrog cov ntaub ntawv raw, kom ua kom cov ntses ua kom tau raws li SAE 1015 {} 1025 qauv. Thaum lub sij hawm yob cov txheej txheem, qhov kub (kub npau taws kub kom tiav ntau dua lossis sib npaug nrog 900 degree) thiab kev tawm tsam. Rau cold - cov yeeb nkab kos, cov txheej txheem txo thiab annealing txheej txheem yuav tsum tau tswj hwm. Kev kuaj ntawm txhua pob yog kuaj rau cov khoom siv tshuab thiab qhov loj me. Tsim kom muaj lub zog traceability (piv txwv li, cov naj npawb kub thiab batch) los pab daws teeb meem kev taug qab. Cov khoom kawg yuav tsum tau tshuaj xyuas thib peb (piv txwv li, sgs) kom ntseeg tau tias lawv tau raws li cov neeg siv khoom.
Dab tsi yog qhov tshwm sim nquag thiab ua rau astm A53 Gr.A cov yeeb nkab steel?
Cov khoom tsis xws luag muaj xws li cov nyom tawg (tshwm sim los ntawm kev hnav khaub ncaws tuab lossis kev coj tsis zoo), vim yog cov khoom siv tsis sib xws), thiab cov khoom sib txawv ntawm cov nqi hluav taws xob (vim yog cov khoom siv tsis xws li lossis cov khoom sib txawv ntawm Oxide nplai). Welded kav dej yuav ua tiav tsis tiav lossis porosity (vim tsis muaj kev tiv thaiv roj tsis txaus). Galvanized kav yog nquag rau plating toast (vim tsis tiav ua ntej - kev kho). Cov kev tsis zoo no tuaj yeem raug txo los ntawm cov txheej txheem ua kom zoo dua, txhim kho hauv - kev tshuaj xyuas, thiab kev kho mob tsis tu ncua.
