Zaɓi da shirye-shiryen na'urorin lantarki na tungsten don GTAW

Zaɓin da shirye-shiryen na'urorin lantarki na tungsten don GTAW yana da mahimmanci don haɓaka sakamako da hana gurɓatawa da sake yin aiki.Hotunan Getty
Tungsten wani nau'in ƙarfe ne da ba kasafai ake amfani da shi don yin walda na gas tungsten ba (GTAW).Tsarin GTAW ya dogara da tauri da tsayin daka na zafin jiki na tungsten don canja wurin walda na yanzu zuwa baka.Wurin narkewa na tungsten shine mafi girma a cikin dukkan karafa, a digiri 3,410 ma'aunin Celsius.
Waɗannan na'urorin lantarki marasa amfani sun zo da girma da tsayi iri-iri, kuma sun ƙunshi tungsten tsantsa ko gami na tungsten da sauran abubuwan da ba kasafai ake amfani da su a duniya ba da oxides.Zaɓin na'urar lantarki don GTAW ya dogara da nau'i da kauri na substrate, kuma ko ana amfani da alternating current (AC) ko kai tsaye (DC) don waldawa.Wanne daga cikin shirye-shiryen ƙarshen ukun da kuka zaɓa, mai siffar zobe, mai nuni, ko yanke, shima yana da mahimmanci don haɓaka sakamako da hana gurɓatawa da sake yin aiki.
Kowace lantarki mai launi ne don kawar da rudani game da nau'in sa.Launi yana bayyana akan titin lantarki.
Pure tungsten electrodes (AWS classification EWP) sun ƙunshi tungsten 99.50%, wanda ke da mafi girman adadin amfani da duk lantarki, kuma gabaɗaya ya fi rahusa fiye da na'urorin lantarki.
Waɗannan na'urorin lantarki suna samar da tukwici mai tsafta lokacin zafi kuma suna samar da kyakkyawan kwanciyar hankali don walda AC tare da daidaitawar raƙuman ruwa.Tungsten mai tsafta kuma yana ba da kwanciyar hankali mai kyau don waldawar AC sine, musamman akan aluminum da magnesium.Yawancin lokaci ba a yi amfani da shi don walda na DC saboda baya samar da farawar baka mai ƙarfi da ke da alaƙa da thorium ko cerium electrodes.Ba a ba da shawarar yin amfani da tungsten mai tsabta akan inverter tushen inverter;don sakamako mafi kyau, yi amfani da lantarki cerium mai kaifi ko lanthanide.
Thorium tungsten electrodes (AWS Rarraba EWTh-1 da EWTh-2) sun ƙunshi aƙalla 97.30% tungsten da 0.8% zuwa 2.20% thorium.Akwai nau'i biyu: EWTh-1 da EWTh-2, wanda ya ƙunshi 1% da 2%, bi da bi.Bi da bi.Ana amfani da na'urorin lantarki da yawa kuma ana fifita su don tsawon rayuwarsu da sauƙin amfani.Thorium yana haɓaka ingancin fitarwar lantarki na lantarki, ta haka yana haɓaka farawa da ƙyale ƙarfin ɗaukar nauyi na yanzu.Wutar lantarki tana aiki da nisa a ƙasa da zafin jiki na narkewa, wanda ke rage yawan amfani da yawa kuma yana kawar da ɗigon baka, ta haka yana inganta kwanciyar hankali.Idan aka kwatanta da sauran na'urorin lantarki, thorium electrodes suna ajiye ƙasa da tungsten a cikin narkakken tafkin, don haka suna haifar da ƙarancin gurɓataccen walda.
Ana amfani da waɗannan na'urorin lantarki musamman don walƙiya na ƙarfe na carbon karfe, bakin karfe, nickel da titanium, da kuma wasu walda na AC na musamman (kamar aikace-aikacen aluminum na bakin ciki).
A lokacin aikin masana'antu, thorium yana ko'ina tarwatsa ko'ina cikin lantarki, wanda ke taimakawa tungsten don kula da gefuna masu kaifi bayan niƙa - wannan shine kyakkyawan siffar lantarki don walda bakin karfe.Lura: Thorium na rediyo ne, don haka dole ne koyaushe ku bi gargaɗin masana'anta, umarni da takardar bayanan amincin kayan (MSDS) yayin amfani da shi.
Cerium tungsten electrode (AWS classification EWCe-2) ya ƙunshi aƙalla 97.30% tungsten da 1.80% zuwa 2.20% cerium, kuma ana kiransa 2% cerium.Waɗannan na'urorin lantarki suna yin mafi kyau a cikin walda na DC a ƙananan saitunan yanzu, amma ana iya amfani da su cikin fasaha cikin ayyukan AC.Tare da kyakkyawar farawar baka a ƙaramin amperage, cerium tungsten ya shahara a aikace-aikace kamar bututun dogo da masana'antar bututu, sarrafa ƙarfe, da aikin da ya haɗa da ƙanana da daidaitattun sassa.Kamar thorium, yana da kyau a yi amfani da shi don walda carbon karfe, bakin karfe, nickel gami da titanium.A wasu lokuta, yana iya maye gurbin 2% thorium lantarki.Kaddarorin lantarki na cerium tungsten da thorium sun ɗan bambanta kaɗan, amma yawancin welders ba za su iya bambanta su ba.
Ba a ba da shawarar yin amfani da wutar lantarki mafi girma amperage cerium ba, saboda mafi girma amperage zai sa oxide yayi ƙaura da sauri zuwa zafi mai zafi, cire abun ciki na oxide kuma ya lalata fa'idodin tsari.
Yi amfani da tukwici masu nuni da/ko yanke (don tsantsar tungsten, cerium, lanthanum da nau'ikan thorium) don hanyoyin walda AC da DC.
Lanthanum tungsten lantarki (AWS rabe-raben EWLa-1, EWLa-1.5 da EWLa-2) sun ƙunshi aƙalla 97.30% tungsten da 0.8% zuwa 2.20% lanthanum ko lanthanum, kuma ana kiran su EWLa-1, EWLa-1.5 da EWLa-2 Lanthanum Department. na abubuwa.Waɗannan na'urorin lantarki suna da ingantacciyar ƙarfin farawa, ƙarancin ƙonawa, kwanciyar hankali mai kyau da kyawawan halaye na sarauta - yawancin fa'idodi iri ɗaya kamar na'urorin lantarki na cerium.Lanthanide lantarki kuma suna da kaddarorin gudanarwa na 2% thorium tungsten.A wasu lokuta, lanthanum-tungsten na iya maye gurbin thorium-tungsten ba tare da manyan canje-canje ga hanyar walda ba.
Idan kuna son haɓaka ƙarfin walda, lanthanum tungsten electrode shine mafi kyawun zaɓi.Sun dace da AC ko DCEN tare da tip, ko ana iya amfani da su tare da samar da wutar lantarki ta AC sine.Lanthanum da tungsten na iya kula da tip mai kaifi sosai, wanda shine fa'ida don walda karfe da bakin karfe akan DC ko AC ta amfani da wutar lantarki mai murabba'i.
Ba kamar thorium tungsten ba, waɗannan na'urorin lantarki sun dace da walda AC kuma, kamar na'urorin lantarki na cerium, suna ba da damar farawa da kula da arc a ƙananan ƙarfin lantarki.Idan aka kwatanta da tungsten mai tsafta, don girman da aka ba da wutar lantarki, ƙari na lanthanum oxide yana ƙara matsakaicin ƙarfin ɗaukar halin yanzu da kusan 50%.
Zirconium tungsten electrode (AWS classification EWZr-1) ya ƙunshi aƙalla 99.10% tungsten da 0.15% zuwa 0.40% zirconium.Wutar lantarki tungsten zirconium na iya haifar da tsayayyen baka kuma yana hana spatter tungsten.Zabi ne mai kyau don walda AC saboda yana riƙe da siffa mai siffar siffa kuma yana da juriya mai girma.Ƙarfin ɗaukarsa na yanzu yana daidai da ko mafi girma fiye da thorium tungsten.Ba a ba da shawarar yin amfani da zirconium don waldar DC a kowane yanayi ba.
Wutar lantarki mai ƙarancin ƙasa tungsten (AWS classification EWG) yana ƙunshe da abubuwan da ba a fayyace su ba ko kuma gaurayewar oxides daban-daban, amma masana'anta suna buƙatar nuna kowane ƙari da adadin sa akan kunshin.Dangane da ƙari, sakamakon da ake so zai iya haɗawa da samar da tsayayyen baka yayin tafiyar AC da DC, tsawon rai fiye da thorium tungsten, ikon yin amfani da ƙananan diamita na lantarki a cikin aiki ɗaya, da kuma amfani da na'urori masu kama da girman girman halin yanzu, da ƙananan tungsten spatter.
Bayan zaɓar nau'in lantarki, mataki na gaba shine zaɓin shiri na ƙarshe.Zaɓuɓɓukan guda uku masu siffar zobe, mai nuni da tarkace.
Yawanci ana amfani da tip mai siffar zobe don tungsten da zirconium electrodes kuma ana ba da shawarar don tafiyar da AC akan sine da injunan GTAW na gargajiya.Don daidaita ƙarshen tungsten daidai, kawai a yi amfani da AC halin yanzu da aka ba da shawarar don diamita na lantarki da aka ba (duba Hoto 1), kuma za a samar da ƙwallon a ƙarshen lantarki.
Diamita na ƙarshen ƙarshen bai kamata ya wuce sau 1.5 na diamita na lantarki ba (misali, lantarki 1/8-inch ya kamata ya samar da ƙarshen diamita 3/16-inch).Babban yanki a ƙarshen lantarki yana rage kwanciyar hankali.Hakanan yana iya faɗuwa ya gurɓata walda.
Nasihu da/ko tukwici (na tsantsar tungsten, cerium, lanthanum da thorium iri) ana amfani da su a cikin inverter AC da DC matakan walda.
Don niƙa tungsten yadda ya kamata, yi amfani da dabaran niƙa musamman da aka ƙera don niƙa tungsten (don hana kamuwa da cuta) da dabaran niƙa da aka yi da borax ko lu'u-lu'u (don tsayayya da taurin tungsten).Lura: Idan kuna niƙa tungsten thorium, da fatan za a tabbatar da sarrafa da tattara ƙura;tashar niƙa tana da isassun tsarin samun iska;kuma bi gargaɗin masana'anta, umarni da MSDS.
Niƙa tungsten kai tsaye a kan dabaran a kusurwar digiri 90 (duba Hoto 2) don tabbatar da cewa alamun niƙa sun shimfiɗa tare da tsawon wutar lantarki.Yin hakan na iya rage kasancewar tudu a kan tungsten, wanda zai iya haifar da zazzagewar baka ko narke a cikin tafkin walda, wanda ke haifar da gurɓatawa.
Gabaɗaya, ana so a niƙa taper a kan tungsten zuwa diamita na lantarki fiye da sau 2.5 (misali, don na'urar lantarki 1/8-inch, saman ƙasa yana da 1/4 zuwa 5/16 inci tsayi).Nika tungsten a cikin mazugi na iya sauƙaƙa sauƙaƙawar farawa da baka, da kuma samar da ƙwaƙƙwaran baka, don samun ingantaccen aikin walda.
Lokacin waldawa akan kayan bakin ciki (0.005 zuwa 0.040 inci) a ƙananan halin yanzu, yana da kyau a niƙa tungsten zuwa aya.Tushen yana ba da damar watsa walda na halin yanzu a cikin baka mai da hankali kuma yana taimakawa hana nakasawa na ƙananan ƙarfe kamar aluminum.Ba a ba da shawarar yin amfani da tungsten da aka nuna don aikace-aikacen mafi girma na yanzu saboda mafi girma na yanzu zai busa tip tungsten kuma ya haifar da gurɓata tafkin walda.
Don aikace-aikace masu girma na yanzu, yana da kyau a niƙa tip ɗin da aka yanke.Don samun wannan siffa, tungsten za a fara ƙasa zuwa taf ɗin da aka kwatanta a sama, sannan a ƙasa zuwa 0.010 zuwa 0.030 inci.Lebur ƙasa a ƙarshen tungsten.Wannan shimfidar ƙasa yana taimakawa hana tungsten canja wuri ta cikin baka.Yana kuma hana samuwar ƙwallo.
WELDER, wanda aka fi sani da Practical Welding A Yau, yana nuna ainihin mutanen da ke yin samfuran da muke amfani da su kuma suke aiki kowace rana.Wannan mujallar ta yi hidima ga al’ummar walda a Arewacin Amirka fiye da shekaru 20.

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Lokacin aikawa: Agusta-23-2021

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