Galvanized karfe shine gabaɗaya Layer na tutiya mai rufi a waje na ƙaramin ƙarfe mai ƙarancin carbon, kuma murfin zinc gabaɗaya lokacin kauri ne 20μm. Matsayin narkewar zinc shine 419 ° C kuma wurin tafasa yana kusan 908 ° C.
Dole ne a goge walda kafin waldawa
Dole ne a goge Layer na galvanized a walda, in ba haka ba za a samar da kumfa, ramukan yashi, walda na karya, da sauransu. Har ila yau, zai sa waldawar ta lalace kuma ta rage tsauri.
Analysis na halaye na galvanized karfe waldi
A lokacin walda, zinc yana narkewa ya zama ruwa kuma yana yawo a saman narkakkar tafkin ko a tushen walda. Zinc yana da babban ƙarfi mai narkewa a cikin ƙarfe. Liquid zinc zai zurfafa lalata ƙarfen walda tare da iyakar hatsi, kuma ƙarancin narkewar zinc zai samar da "karfe mai ruwa".
A lokaci guda, zinc da baƙin ƙarfe na iya samar da mahadi masu gatsewa na intermetallic. Waɗannan matakai masu ɓarna suna rage robobin ƙarfen walda kuma suna haifar da tsagewa ƙarƙashin damuwa mai ƙarfi.
Welding fillet welds, musamman fillet welds na T-joints, sun fi yiwuwa su samar ta hanyar fasa. A lokacin da galvanized karfe aka welded, zinc Layer a kan tsagi surface da gefen zai oxidize, narkewa, ƙafe a karkashin aikin baka zafi, kuma volatilize farin hayaki da tururi, wanda zai iya sa wald porosity sauƙi.
ZnO da aka kafa ta hanyar iskar oxygen yana da babban wurin narkewa, sama da 1800 ° C. Idan sigogi sun yi ƙanƙanta yayin waldawa, haɗa ZnO slag zai faru. A lokaci guda, tun lokacin da Zn ya zama deoxidizer, FeO-MnO ko FeO-MnO-SiO2 za a samar da ƙaramar ƙaramar narkewar oxide slag. Na biyu, saboda fitar da zinc, yawan adadin fararen hayaki zai yi rauni, wanda zai fusata kuma yana cutar da jikin mutum. Saboda haka, dole ne a goge Layer na galvanized a wurin waldi.
Kayan aikin walda na Xinfa yana da halaye masu inganci da ƙarancin farashi. Don cikakkun bayanai, da fatan za a ziyarci:Welding & Yanke Manufacturers - China Welding & Yanke masana'anta & Suppliers (xinfatools.com)
Yadda za a sarrafa galvanized karfe walda tsari?
A pre-welding shiri na galvanized karfe ne iri daya da na general low-carbon karfe. Yana da mahimmanci a kula da girman tsagi a hankali da layin galvanized kusa. Domin weld ta hanyar, da tsagi size ya zama dace, kullum 60 ~ 65 °. Ya kamata a bar wani tazara, gabaɗaya 1.5 ~ 2.5mm. Domin rage shigar da zinc a cikin weld, za a iya cire galvanized Layer a cikin tsagi kafin waldawa.
A cikin ainihin aikin sa ido, ana yin amfani da tsagi na tsakiya kuma ba a yi amfani da tsarin baƙar fata ba don sarrafawa ta tsakiya. Tsarin walda mai Layer biyu yana rage yiwuwar waldawar da ba ta cika ba.
Ya kamata a zaɓi sandar walda bisa ga kayan tushe na bututun galvanized. Gabaɗaya, an fi amfani da J422 don ƙananan ƙarfe na carbon saboda sauƙin aiki.
Dabarar walda: Lokacin walda farkon Layer na walda mai yawa, a yi ƙoƙarin narkar da Layer na Zinc da vaporize da ƙafe shi don kuɓuta daga walda, wanda zai iya rage yanayin tutiyar ruwa da ke cikin walda.
Lokacin walda fillet walda, yi ƙoƙarin narke Layer zinc a farkon Layer kuma sanya shi tururi da ƙafe don tserewa walda. Hanyar ita ce fara motsa ƙarshen lantarki a gaba game da 5 ~ 7mm, sa'an nan kuma komawa zuwa matsayin asali kuma a ci gaba da waldawa gaba bayan tudun zinc ya narke.
A cikin walda a kwance da tsaye, idan aka yi amfani da gajerun na'urorin lantarki irin su J427, yanayin cizon gefen zai zama ƙanƙanta. Idan aka yi amfani da fasahar motsi ta baya da gaba, zai fi yiwuwa a sami sakamako mara lahani mara lahani.
Lokacin aikawa: Satumba-05-2024
