Lalacewar da ke iya faruwa a cikin yankin waldawar baka mai nutsewa sun haɗa da pores, tsagewar zafi, da yankewa.

1. Kumfa. Kumfa galibi suna faruwa a tsakiyar walda. Babban dalilin shi ne har yanzu hydrogen yana boye a cikin karfen da aka yi masa walda a sigar kumfa. Don haka matakan kawar da wannan lahani shine a fara cire tsatsa, mai, ruwa, da danshi daga wayar walda da walda, na biyu kuma, a bushe magudanar ruwa da kyau don cire danshi. Bugu da ƙari, haɓaka ƙarfin halin yanzu, rage saurin walda, da rage ƙarfin ƙarfin narkakkar karfen yana da tasiri sosai.

2. Sulfur cracks (fashewar sulfur ya haifar). A lokacin walda faranti tare da karfi sulfur segregation makada (musamman taushi tafasar karfe), sulfides a cikin sulfur segregation band shiga cikin weld karfe da kuma haifar da fasa. Dalili kuwa shi ne, akwai ƙananan ma'aunin narkewar ƙarfe sulfide a cikin rukunin sulfur segregation band da hydrogen a cikin karfe. Don haka, don hana faruwar wannan yanayin, yana da tasiri a yi amfani da ƙarfe da aka kashe ko kuma aka kashe tare da ƙarancin sulfur segregation bandeji. Na biyu, tsaftacewa da bushewa saman walda da juyi suna da matukar mahimmanci.

3. Thermal fasa. A cikin waldawar baka mai nutsewa, zazzagewar zafi na iya faruwa a cikin walda, musamman a cikin ramukan baka a farkon da ƙarshen baka. Don kawar da irin wannan tsaga, ana shigar da pads a farkon da ƙarshen baka, kuma a ƙarshen waldawar farantin, za a iya jujjuya bututun mai walda da karkace kuma a haɗa su cikin zobe. Ƙunƙarar zafi yana da sauƙin faruwa lokacin da damuwa na walda ya yi girma sosai ko kuma ƙarfe na walda yana da yawa.

4. Slag hadawa. Haɗin ɓangarorin yana nufin cewa wani ɓangare na slag ya kasance a cikin ƙarfen walda.

5. Rashin shigar ciki. Haɓaka karafa na walda na ciki da na waje bai isa ba, wani lokacin kuma ba a haɗa shi ba. Ana kiran wannan yanayin rashin isashen shiga.

6. Ƙarƙashin ƙasa. Undercut wani tsagi ne mai siffar V a gefen walda tare da tsakiyar layin walda. Ƙarƙashin ƙaƙƙarfan yanayi yana haifar da rashin dacewa kamar saurin walda, halin yanzu, da ƙarfin lantarki. Daga cikin su, saurin walda ya yi yawa yana iya haifar da lahani fiye da halin da bai dace ba.