Ci gaba da simintin simintin gyare-gyare ko saman billet yana nuna ramukan da ba daidai ba, waɗanda galibi ramuka ne na gefe, da kuma ramukan tsaye.Bacin rai da ƙari a cikin bakin karfe austenitic (nau'in Cr18Ni9) da ƙaramin ƙarfe mai ƙarancin carbon (carbon 0.10 zuwa 0.15%) na farfajiyar slab.Rashin damuwa yana da sauƙi don samarwa a gefen gefe na faɗin slab ko ɓangaren kusurwa na kowane ɓangaren fuska.Tsananin damuwa yana fashe, fashe saman zurfin shigar ƙarfen da ya bayyana tabo, har ma da sake fashewar fata.Dalilin slab surface depressions da aka samar yana da yawa.Tun da farkon matakan ƙarfafa harsashi "mai sanyi sosai" ƙanƙantar gidaje na billet na gida wanda ya haifar da manyan girma, haɓakar da ba daidai ba zai haifar da samuwar rashin tausayi na gidaje;Billet karfe harsashi shrinkage a tsaye da matsatsi na tsaye wanda ya haifar da hulɗar tsakanin sake lanƙwasa lokacin yin simintin don haifar da baƙin ciki na gefe;Canjin leda yana faruwa (duba gefen murabba'i da bambancin lu'u-lu'u) na billet kusa da kusurwar obtuse kusa da madaidaitan wuraren ramuka (ragi) da iyakar iyakar ramukan shimfidar shimfidar ramukan shimfidar wuri suna cikin gyaggyarawa sakamakon rashin daidaituwar sanyaya;recessed tsara kuma damu da abun da ke ciki na karfe, austenitic bakin karfe da low carbon karfe a cikin mold harsashi girma m sauki samar da ramuka;high-yi bakin karfe thermal fadada da thermal watsin low yiwuwa ga ciki;Mr. low Carbon ya ƙarfafa nan da nan bayan canjin austenite zuwa ƙanƙantar ƙarar ferrite lokacin da babban ƙarfe wannan sinadari mai ƙima don samar da mafi girman ramuka.A halin yanzu, abubuwan da suka faru na baƙin ciki kuma suna shafar ci gaba da yanayin simintin gyare-gyare: Ayyuka kamar foda mara kyau, canjin yanayin ƙirar ciki, canje-canje a cikin saurin jefawa da sauran dalilai.Miƙewa abin nadi mai ɗanƙon ƙarfe na baƙin ƙarfe, yana samar da rarraba ramuka na lokaci-lokaci (indentations) akan abubuwan da ke haifar da shimfidar ƙasa.

Magani su ne: mold bango yi "jinkirin sanyaya", rage surface yankin kusa da mold zafi juyi tsanani, m girma da kuma m harsashi, za a iya amfani da mold bango plating ko abin da ake kira "zafi saman mold" don inganta blank harsashi girma uniformity;ƙaramin gyare-gyaren gyare-gyare (kasa da 3mm), ta amfani da mafi kyawun juzu'i na aiki, daidaitawar danko daidai da saurin simintin, don tabbatar da cika kayan aiki;da slag Layer na dacewa kauri, kwanciyar hankali slag film iko daidai high superheat da simintin gudun;da yin amfani da m submerged bututun ƙarfe geometries da m zurfin sa, kauce wa ruwa vortex da sauransu sun bayyana a cikin ni'imar harsashi uniform girma, kazalika da kula da tsaftace sama da straightening rollers, iya hana ramuka an kafa.