Pombi yesimbi ine galvanized simbi, ine mabhenefiti maviri ekudzivirira ngura uye hupenyu hurefu hwesevhisi, uye mutengo wacho wakadzikira, saka iko zvino chiyero chekushandiswa kwayo chiri kuramba chichikwira nekukwira, asi vamwe vashandisi havatarise kana welding galvanized pombi. mamwe matambudziko asingakoshi, saka ndeapi matambudziko anofanirwa kutariswa kana uchitsvaira mapaipi akabatiswa?
01 Chinangwa ndechekukwenenzvera
Iyo galvanized layer paweld inofanirwa kupepereswa, zvikasadaro mabhuru, trachoma, welding yenhema, nezvimwe zvichaitika.Ichaitawo kuti weld brittle uye kuderedza kuoma.
02 Welding hunhu hwemarata
Simbi ine galvanized inowanzo putirwa nedhiri ye zinc kunze kweyakaderera kabhoni simbi, uye galvanized layer inowanzoita 20um gobvu.Zinc ine nzvimbo yekunyunguduka inosvika 419°C uye painofashaira inosvika 908°C.Munguva yewelding, zinki inonyunguduka kuita mvura inoyangarara pamusoro pedziva rakanyungudutswa kana pamudzi weweld.Zinc ine hombe kunyungudika kwakasimba musimbi, uye zingi mvura inobvisa weld simbi zvakadzika pamuganhu wezviyo, uye zingi ine yakaderera kunyungudika ichaita "liquid metal embrittlement".Panguva imwecheteyo, zinc nesimbi zvinogona kuumba intermetallic brittle compounds, uye idzi brittle phases dzinoderedza plastiki ye weld metal uye inokonzera kutsemuka pasi pekuita kwekunetseka kwekunetseka.Kana iyo fillet welds yakasungwa, kunyanya iyo fillet welds yeT-joints, kupinda mukati kunowanzoitika.Kana simbi yakakoshwa ichiiswa welded, iyo zinc layer iri pa groove pamusoro uye kumucheto kuchave ne oxidized, kunyungudutswa, kubuda evaporated uye chena utsi uye chiutsi chinove chanyungudika pasi pechiito chekupisa kwearc, izvo zvinokonzeresa weld pores.ZnO yakaumbwa nekuda kweoxidation ine nzvimbo yakakwira yekunyungudika, pamusoro pe1800°C.Kana iyo parameter iri diki zvakanyanya panguva yewelding process, zvinokonzeresa kubatanidzwa kweZnO slag, uye panguva imwe chete.Sezvo Zn yava deoxidizer.Gadzira FeO-MnO kana FeO-MnO-SiO2 yakaderera melting point oxide slag.Chechipiri, nekuda kwekubuda kwe zinc, huwandu hukuru hwehutsi huchena hunoputika, hunogumbura uye hunokuvadza kumuviri wemunhu.Naizvozvo, iyo galvanized layer pane welding point inofanirwa kukwenenzverwa uye kuraswa.
03 Welding process control
Iyo pre-welding gadziriro yegalvanized simbi yakafanana neyeyakajairika low-carbon simbi.Zvinofanira kucherechedzwa kuti groove saizi uye iri pedyo galvanized layer inofanira kunyatsobatwa.Kupinda, ukuru hwegorofu hunofanirwa kuve hwakakodzera, kazhinji 60 ~ 65 °, paine imwe gap, kazhinji 1.5 ~ 2.5mm;kuti uderedze kupinda kwe zinc mu weld, galvanized groove mu groove inogona kuva Solder mushure mokunge jira rabviswa.
Mubasa chairo, centralized beveling, hapana blunt edge process inogamuchirwa yepakati kudzora, uye maviri-layer welding process inoderedza mukana wekupinda kusina kukwana.Iyo welding tsvimbo inofanira kusarudzwa maererano nehwaro hwezvinhu zvepombi yesimbi yakakoswa.Kune general low kabhoni simbi, zvakajairika kusarudza J422 nekuda kwekufunga kwekureruka kwekushanda.
Welding nzira: Paunenge uchipinza chikamu chekutanga che weld seam mune yakawanda-layer welding, edza kunyungudutsa zinc layer uye iite kuti ipfupise, iputse uye upukunyuke musono we weld, izvo zvinogona kuderedza zvakanyanya mvura zinc inosara mu weld seam.Paunenge uchipisa fillet weld, edzawo kunyungudutsa zinc layer pane yekutanga layer uye iite kuti inyunguduke uye iputse kutiza weld.Nzira yacho ndeyekufambisa kuguma kwe electrode mberi pamusoro pe5 ~ 7mm, apo zinc layer Mushure mekunyunguduka, dzokera kunzvimbo yepakutanga uye ramba uchienderera mberi.Kune yakachinjika welding uye vertical welding, kana mapfupi slag electrodes akadai seJ427 akashandiswa, maitiro e undercutting achava madiki;kana iyo yekumashure-uye-kumberi uye kumashure tekinoroji yekufambisa yakashandiswa, defect-isina welding quality inogona kuwanikwa.
Nguva yekutumira: Mar-15-2023
