Welding yana nufin kayan walda a ƙarƙashin ƙayyadaddun sharuɗɗan don gina memba bisa ga buƙatun ƙira, da ikon biyan buƙatun sabis ɗin da aka ƙaddara.Ta hanyar walda kayan walda, walda, nau'in sashi da buƙatun amfani da ke shafar abubuwa huɗu.

Low carbon karfe waldi
Saboda abun ciki na carbon ƙananan ƙarfe (misali: bututun ƙarfe na carbon), manganese, abun ciki na silicon ba shi da ƙasa, don haka yawanci ba zai sami ƙarfin walƙiya mai taurin nama ko nama ba.Low carbon karfe weld gidajen abinci plasticity da tasiri taurin ne mai kyau, waldi, kullum ba tare da preheating, sarrafa zafin jiki da kuma zafi tsakanin yadudduka, ta yin amfani da post-weld zafi magani ba inganta kungiyar, dukan tsari bukatar ba dauki musamman waldi tsari matakan. weldability.

Matsakaicin carbon karfe waldi
Rage yawan ƙwayar carbon na 0.25% ~ 0.60% don matsakaicin ƙarfe na carbon.Lokacin da yawan juzu'in carbon da manganese na kusan 0.25% bai yi girma ba, mai kyau weldability.Tare da karuwar abun ciki na carbon, weldability a hankali ya lalace.Idan abun ciki na carbon yana da kusan 0.45%, yayin da aka dogara da tsarin walda mai laushi mai laushi da aka yi amfani da shi lokacin da yankin da ya shafa zafi zai iya haifar da gaggautsa martensite, mai sauƙin fashe, cewa samuwar sanyi.A lokacin walda, adadin tushe abu ne narke a cikin weld, da weld sabõda haka, carbon abun ciki ya karu, don inganta thermal fatattaka a cikin weld, musamman a lokacin da tsananin iko da ƙazantar sulfur, mafi m.Wannan tsaga ya fi damuwa a cikin ramin a rarraba zafi a cikin tsagewar walda da ɓatacce don haka layukan daɗaɗɗa daidai gwargwado ga walda.

High carbon karfe waldi
Lokacin da high-carbon karfe carbon abun ciki ne mafi girma fiye da 0.60%, hardening, waldi crack ji na ƙwarai bayan da hali ne mafi girma kuma saboda haka matalauta weldability, ba za a iya amfani da a yi na welded Tsarin.Bukatar a fi amfani da su wajen kera taurin ko ɓarna sassa da abubuwan haɗin gwiwa, aikin walda galibi gyaran walda ne.Saboda ƙarfin ƙarfin ƙarfin ƙarfe na carbon mafi yawa a cikin 675MPa ko fiye, don haka ƙirar lantarki gama gari E7015, E6015, na iya zaɓar tsarin E5016, E5015 tsarin lantarki lokacin da membobin suka nemi da yawa.Bugu da ƙari, za mu iya amfani da chrome-nickel austenitic karfe lantarki don waldawa.Saboda manyan sassan ƙarfe na carbon don samun ƙarfi mai ƙarfi da juriya, kayan da kansa yana ƙarƙashin magani mai zafi, walƙiya yakamata a rigaya ta goge shi don waldawa.Ya kamata a za'ayi kafin walda preheat, da preheat zafin jiki ne kullum sama da 250 ~ 350 ℃, da waldi tsari dole ne ba kasa da zazzabi na rike Layer tsakanin preheating zafin jiki.Weldments bayan waldi na bukatar jinkirin sanyaya zafi da kuma nan da nan zuwa cikin tanderu a 650 ℃ domin danniya taimako zafi magani.