Me yasa matattarar bakin karfe masu wucewa ta hanyar amfani da FCAW sukan kasa yin bincike akai-akai?David Meyer da Rob Koltz sun yi nazari sosai kan dalilan gazawar.Getty Images
Tambaya: Muna gyaran gyare-gyaren gyare-gyaren gyare-gyaren gyare-gyare a cikin tsarin bushewa a cikin yanayin rigar. Our welds sun kasa dubawa saboda porosity, undercuts da fashe welds.Weld A514 zuwa A36 ta amfani da 0.045 ″ diamita, duk matsayi, cored 309L, 75% Argon / 25% Carbon Dioxide gas don mafi kyawun juriya.
Mun gwada carbon karfe electrodes, amma welds sun yi sauri da sauri kuma mun sami bakin karfe don yin aiki mafi kyau. Dukkanin welds ana yin su a cikin wani wuri mai laushi, 3/8 inch. Saboda ƙayyadaddun lokaci, duk welds an yi a lokaci guda. zai iya sa weld ɗinmu ya gaza?
Ba za mu iya yin sharhi game da sigogin walda ba saboda ba mu san su ba. Ƙarƙashin lalacewa da ke faruwa a 1F yawanci yana haifar da matsanancin aikin walda ko aiki da sauri ko kuma saurin tafiya a hankali.
Tunda walda yana ƙoƙarin saka 3/8 ". Yiwuwar overhandling tocilan na iya zama wani ɓangare na alhakin walda fillet guda ɗaya tare da ƙaramin waya mai ƙarancin diamita. Duk da haka, yana bayyana yana amfani da kayan aiki mara kyau a wurin aiki maimakon batun fasaha, wanda shine dalilin da ya sa.
Rashin ƙazanta yana haifar da ƙazanta a cikin walda, asara ko wuce haddi na iskar kariya, ko yawan shayar da danshi na waya mai ruwa-ruwa.Kana ambata cewa wannan aikin gyara ne a kan jikakken kafofin watsa labarai a cikin na'urar bushewa, don haka idan ba a tsabtace walda ba sosai. , wannan zai iya zama babban dalilin rashin kuskure.
The filler karfe da kake amfani da shi ne duk matsayi flux cored waya, wadannan nau'in waya suna da sauri daskarewa slag tsarin.Wannan wajibi ne don tallafa wa kududdufin walda lokacin walda a tsaye ko sama.The disadvantage na sauri daskarewa slag shi ne cewa shi solidifies kafin Weld pool a ƙarƙashinsa. Idan har yanzu gas ɗin yana fitowa, yawanci yakan zama tarko kuma ya bayyana daga baya a cikin nau'i na pores ko ƙwanƙwasa tsutsa. walda a cikin fasfo ɗaya, kamar yadda yake cikin aikace-aikacen ku.
Weld fatattaka a farkon da kuma dakatar da walda na iya haifar da da dama dalilai.Tun da kana kwanciya da wani babban dutsen dutse mai tsayi da ƙananan waya diamita, za ka iya fuskanci rashin isasshen fusion (LOF) a tushen weld.Weld. fatattaka wani abu ne na yau da kullun saboda yawan damuwa na walda da LOF a tushen.
Don wannan girman waya, ya kamata ku yi amfani da wucewa biyu ko uku don kammala 3/8 na inch. Fillet welds, babu kowa. Kuna iya samun shi da sauri don yin walda mara lahani fiye da yin walda mara lahani guda ɗaya sannan sai ku gyara shi.
Duk da haka, wani batu da zai iya taka muhimmiyar rawa wajen tsattsage walda shine matakin da ba daidai ba na ferrite a cikin walda, wanda galibi shine babban dalilin tsagewar. An samar da waya 309L don walda bakin karfe zuwa carbon karfe maimakon carbon karfe zuwa carbon karfe. .The takamaiman weld sunadarai na wannan samfurin kuma yana la'akari da wasu tushe karfe dilution ga duka tushe metals.Saboda haka, a bakin zuwa carbon karfe aikace-aikace, wasu gami samu daga bakin karfe taimaka daidaita sinadaran abun da ke ciki da kuma samar da m yawa na ferrite.Amfani da wani. Karfe mai cike da kusan 50% ferrite, kamar 312 ko 2209, zai kawar da yuwuwar fashewa saboda ƙarancin abun ciki na ferrite.
Hanya mafi kyau don samar da kyakkyawan juriya na lalacewa shine walda haɗin gwiwa tare da daidaitaccen carbon ko bakin karfe na lantarki sannan kuma ƙara wani Layer na electrode na surfacing.Duk da haka, kun ambaci cewa kun kasance ƙarƙashin ƙayyadaddun lokaci mai tsauri da kuma duk wani walda mai wucewa da yawa. halin da ake ciki ya fita.
Gwada juyawa zuwa waya mai girman diamita, irin su 1/16 inch ko mafi girma. Yin amfani da waya mai kariya mai kariya ta gas yana da kyau saboda yana samar da tsaftacewa mai kyau da kuma mafi kyawun kariya na iska fiye da wayoyi marasa motsi. Duk da haka, maimakon haka, maimakon. waya mai duk matsayi, waya mai kwance da kwance kawai zata iya rage porosity ko bin diddigin tsutsa. Hakanan zaka canza karfen filler daga 309L zuwa 312 ko 2209.
WELDER, wanda a da yake Aiki na Welding A Yau, yana nuna ainihin mutanen da suke yin samfuran da muke amfani da su kuma suke aiki da su kowace rana.Wannan mujallar ta yi hidima ga al'ummar walda a Arewacin Amirka sama da shekaru 20.
Yanzu tare da cikakken damar yin amfani da bugu na dijital na The FABRICATOR, samun sauƙin samun albarkatun masana'antu masu mahimmanci.
Buga na dijital na The Tube & Pipe Journal yanzu yana da cikakkiyar dama, yana ba da sauƙi ga albarkatun masana'antu masu mahimmanci.
Ji daɗin cikakken damar yin amfani da bugu na dijital na Jaridar STAMPING, wanda ke ba da sabbin ci gaban fasaha, mafi kyawun ayyuka da labarai na masana'antu don kasuwar tallan ƙarfe.
Yanzu tare da cikakken damar yin amfani da bugu na dijital na The Fabricator en Español, sauƙin samun dama ga albarkatun masana'antu masu mahimmanci.