Tare da haɓakar tattalin arzikin ƙasa, bututun ƙarfe na bango mai kauri na LSAW a cikin dandamalin teku, kamar yanayin zafi da matsa lamba na jirgin ruwa, tulin bututun iska an yi amfani da shi sosai.Manufacturing irin wannan karfe bututu kullum amfani da D36 karfe, S355 karfe kuma shi ne Z zuwa yi na karfe farantin tsarin, farantin kauri, ya fi girma carbon abun ciki ne mafi girma, da kuma high carbon daidai, matalauta weldability, hardening hali, runtse waldi yi. na waldi hadin gwiwa, sauki don samar da sanyi crack, musamman a cikin m fasa bayyana yiwuwa ne ya fi girma.Bayan walda fatattaka, ban da zama dole kula matakan, amma kuma kula da workpiece gyara a lokaci.S355 karfe, misali wanda ya bayyana bayan walda madaidaicin matakan gyara fasa.Kankare shine:

1, tabbatar da lahani

100% na duk weld akan binciken UT, yi alama wurin fashe, tsayi, zurfin da shugabanci.Idan waldi line ne m, kuma bayar da shawarar tearing up dukan labarin submerged baka waldi kabu, shawarar gida gyara waldi sanda baka waldi.

2, kafin jirgin yayi preheating

Preheat zafin jiki ne 110-170 ℃, preheat zafin jiki gano matsayi na weld a ɓangarorin da ba kasa da 150 mm, dumama tsakanin kewayon ga m lahani a kusa da 500 mm.

3, guguwar iska

Iyakar iskar gouging crack lahani duka ya ƙare zuwa waje, mai kyau waldi mai fita iska gouging tsakanin bai kasa da 50 mm, planer Ramin a duka iyakar ga m miƙa mulki, m miƙa mulki surface da a tsaye line akalla fiye da 45 °.Iskar carbon gouging sanda ya kamata a karkashin 60 ° Angle, zai zo a cikin crack, musamman a cikin kwana a matsayin kananan kamar yadda zai yiwu.

4, nika

Don samun baƙar fata, polishing bayan saman ya kamata ya zama sauƙi mai sauƙi, kada ya sami rami mai zurfi mai zurfi.

5, PT

Bayan an sanyaya zuwa yanayin da ya dace don gwajin shiga (PT).

6, nika

Dangane da sakamakon gwajin PT, niƙa, gogewa har sai babu ja layi.

7, MT

Yi bayan gwajin ƙwayar maganadisu (MT), tabbatar da cewa babu ragowar tsagewa, in ba haka ba yakamata a ci gaba da gogewa, har sai (MT) don gano tsagewar.

8, preheating kafin walda

Shawarar preheating zafin jiki ne 110-170 ℃, preheat zafin jiki gano matsayi na weld a garesu na ba kasa da 150 mm, Weld dumama kewayon nesa kasa da 500 mm.

9, walda

Za'ayi daidai da umarnin aiki na gyaran waldi, nisa weld bai wuce 15 mm ba, yana iya ƙetare kishiyar su.Ko za a iya amfani da, walda atomatik submerged baka waldi tsari.

10, adana zafi, jinkirin sanyaya bayan walda

11, maganin zafi bayan walda

Heat magani bayan waldi ne yafi watsa hydrogen, don rage saura danniya bayan waldi, domin ya fi girma stiffness weldment da musamman "hydrogen kawar da sarrafa", "kawar da danniya na zafi magani.Ana ba da shawarar tsarin kula da zafi: nan da nan bayan kammala walda tare da bargo na lantarki yana mai zafi zuwa 200 ℃, adana zafi yana rufe jinkirin sanyaya bayan 2 h.

12, bayan gwajin walda

48 h bayan kammala walda, gwajin NDT, daidai da buƙatun don tabbatar da ingantaccen gyara.