Yaushewaldi bakin karfe, aikin lantarki dole ne ya dace da manufar bakin karfe.Dole ne a zaɓi na'urar lantarki ta bakin ƙarfe bisa ga ƙarfe tushe da yanayin aiki (ciki har da zafin aiki, matsakaicin lamba, da sauransu).
Ana amfani da nau'ikan bakin karfe guda hudu da kuma abubuwan hadewa
Bakin karfe za a iya raba iri hudu: Austenitic, martensitic, ferritic da biphase bakin karfe, kamar yadda aka nuna a Table 1.
Wannan ya dogara ne akan tsarin metallographic na bakin karfe a dakin da zafin jiki.Lokacin da ƙaramin ƙarfe ya yi zafi zuwa1550° F, tsarin yana canzawa daga yanayin zafin daki zuwa lokacin austenitic.Lokacin da aka sanyaya, tsarin ƙarfe mai laushi yana komawa zuwa ferrite.Tsarin Austenitic da ke akwai a yanayin zafi mara ƙarfi kuma ba su da ƙarfi da ƙarfi fiye da tsarin ferrite na ɗaki.
Yadda za a zabi daidai bakin karfe kayan walda?
Idan kayan tushe iri ɗaya ne, ƙa'idar farko ita ce "daidaita kayan tushe".Misali, zaɓi kayan walda don310 or 316bakin karfe.
Don walda iri iri, ana bin ma'aunin zaɓin kayan tushe tare da babban abun ciki na alloying.Misali, idan bakin karfe 304 ko 316 aka welded, zaɓi nau'in316.
Amma akwai kuma da yawa ba su bi ka'idar "matching tushe abu" na musamman yanayi, sa'an nan ya zama dole don "tuntubar da waldi kayan zabi tebur".Misali, rubuta304bakin karfe shine mafi yawan karfen tushe, amma babu Nau'i304lantarki.
Idan kayan walda sun dace da kayan tushe, yadda za a zabi kayan walda don walda304bakin karfe?
Lokacin walda304bakin karfe, amfani iri308kayan walda, saboda ƙarin abubuwan da ke cikin308bakin karfe zai iya inganta yankin walda.
308L kuma zaɓi ne mai karɓa.L yana nufin ƙananan abun ciki na carbon,3XXL bakin karfe carbon abun ciki ≤0.03%, da ma'auni3XXbakin karfe na iya ƙunsar har zuwa0.08%abun ciki na carbon.
Saboda walda mai nau'in L na nau'in nau'in rarrabuwa ne kamar waldi maras nau'in L, masana'antun yakamata su ba da kulawa ta musamman ga yin amfani da walda mai siffa ta L saboda ƙarancin abun ciki na carbon ɗinsa yana rage halayen lalatawar intergranular (duba Hoto 1).
Yadda za a weld bakin karfe da carbon karfe?
Don rage farashi, wasu sifofi suna walda wani Layer na juriyar lalata zuwa saman karfen carbon.Lokacin yin walda wani abu mai tushe ba tare da haɗakar abubuwa tare da kayan tushe tare da abubuwa masu haɗawa ba, yi amfani da kayan walda tare da abun ciki mai girma don daidaita ƙimar dilution a cikin walda.
Lokacin walda carbon karfe da304 or 316bakin karfe da sauran irinsa bakin karfe (duba Table 2),309L kayan waldaya kamata a yi la'akari da shi a mafi yawan lokuta.Idan kana son samun babban abun ciki na Cr, zaɓi nau'in312.
Menene aikin tsaftacewa da ya dace kafin walda?
Lokacin waldawa da wasu kayan, da farko cire mai, alamomi da ƙura tare da kaushi marar chlorine.Bugu da kari, abu na farko da ya kamata a mai da hankali a lokacin walda bakin karfe shi ne don kauce wa gurɓata da carbon karfe da kuma rinjayar da lalata juriya.Wasu kamfanoni suna adana bakin karfe da carbon karfe daban don guje wa kamuwa da cutar.Yi amfani da ƙafafun niƙa na musamman da goge don bakin karfe lokacin tsaftace wurin da ke kusa da tsagi.Wani lokaci haɗin gwiwa yana buƙatar tsaftacewa a karo na biyu.Saboda aikin diyya na lantarki na walda bakin karfe ya fi wuya fiye da na carbon karfe waldi, tsaftacewar haɗin gwiwa yana da mahimmanci.
Lokacin aikawa: Mayu-09-2023