Welded simbi pombi yekugadzira maitiro isimbi pepa, tambo, uye dzimwe nzira dzakasiyana dzekuumba uchishandisa yakatwasuka press roll kana helical direction curling kuita inodiwa muchinjiko-chikamu chimiro, uyezve nenzira yekupisa, kumanikidza, nzira dzakasiyana dzewelding weld pamwechete kuti kuwana simbi.Naizvozvo, kuremara mune welded simbi pombi yakakamurwa kuita zvikamu zviviri: simbi hwaro zvinhu urema uye weld urema.

1. Steel base material defect
Iyo shizha zvinhu zvinokanganisa mushure mekukunguruka uye mamwe maitiro, mazhinji ehurongwa, anoenderana nepamusoro;yavo huru utera delamination, inclusions, makatsemuka, kupeta, etc., inova akajairika akaturikidzana urema hwomukati.Stratification ichagadzira zvakasiyana-siyana zvekutsemuka apo iyo tensile stress perpendicular to the surface of sheet by hierarchical ichakanganisa zvakanyanya kusimba kwepombi yesimbi, haibvumirwi kukanganisa.

2. Weld defects
Weld defects inoreva kuremara panguva yewelding kana mushure mewelding izvo zvinoita kuti weld ipatsanurwe kuita makatsemuka, pores, slag, isina kukwana kupinda, isina kukwana fusion, undercut weld defects.Intensive weld porosity, slag, etc. a dense matatu-dimensional kuremara, makatsemuka, kushaya fusion uye humwe hurema mune furati, kukuvadza kukuru.Strip slag, kupinda kusina kukwana uye kumwe kukanganisa munyaya yekubvisa, kukuvadza kukuru.Pores, slag uye mamwe madiki point-akange akaremara mune iyo kesi.Weld hurema hunogona kukonzera kusimba kwesimbi, mapurasitiki nezvimwe zvinhu, zvinokanganisa zvakanyanya kunaka kwesimbi, welded simbi pombi mhando inokanganisa zvakananga kushanda kwakachengeteka uye hupenyu hwebasa remapaipi emafuta uye gasi, uye nekudaro kuongororwa kweweld kunonyanya kukanganisa kutsemuka, pores, slag, kupinda kusina kukwana, kusanganiswa kusina kukwana uye kumwe kukanganiswa kwengozi yekuona kukanganisa.