Uxinzelelo olushiyekileyo lombhobho we-LSAW lubangelwa kakhulu kukupholisa okungalinganiyo. Uxinzelelo olushiyekileyo luxinzelelo lwangaphakathi lwe-self phase equilibrium ngaphandle kwamandla angaphandle. Olu xinzelelo olushiyekileyo lukho kwiindawo ezishushu eziqengqelekayo zamacandelo ahlukeneyo. Okukhona ubukhulu becandelo lentsimbi yecandelo eliqhelekileyo bubukhulu, kokukhona uxinzelelo olushiyekileyo luba lukhulu.
Nangona uxinzelelo olushiyekileyo luzilungelelanisile, lusenempembelelo ethile ekusebenzeni kwamalungu esinyithi phantsi kwamandla angaphandle. Umzekelo, lunokuba nemiphumo emibi ekuguqukeni, ukuzinza kunye nokumelana nokudinwa. Emva kokuwelda, izinto ezingezizo zesinyithi kumbhobho we-LSAW zicinezelwa zibe ngamaphepha amancinci, nto leyo ebangela ukuqhekeka. Emva koko ukuwelda kuyawohloka kakhulu ukusebenza kokutsalwa kombhobho we-LSAW kwicala lobukhulu, kwaye ukukrazuka kwe-interlayer kunokwenzeka xa i-weld incipha. Uxinzelelo lwendawo olubangelwa kukuncitshiswa kwe-weld ludla ngokuba ngamaxesha amaninzi kuxinzelelo lwe-yield point, olukhulu kakhulu kunolo lubangelwa ngumthwalo. Ukongeza, umbhobho we-LSAW ngokuqinisekileyo uya kuba nee-T-welds ezininzi, ngoko ke amathuba okuba neziphene ze-welding aphuculwe kakhulu. Ngaphezu koko, uxinzelelo olushiyekileyo lwe-welding kwi-T-weld lukhulu, kwaye isinyithi se-weld sihlala sikwimeko yoxinzelelo olunemilinganiselo emithathu, nto leyo enyusa amathuba okuqhekeka.
Umthungo wokuwelda wepayipi efakwe i-spiral submerged arc welded usasazwa kumgca ojikelezayo, kwaye ii-welds zinde. Ingakumbi xa i-welding phantsi kweemeko eziguquguqukayo, i-weld ishiya indawo yokwenza ngaphambi kokuba iphole, okulula ukuvelisa ii-welding hot crack. Icala lokuqhekeka lihambelana ne-weld kwaye lenza i-engile edibeneyo ne-axis yombhobho wentsimbi, ngokubanzi, i-engile iphakathi kwe-30-70 °. Le engile ihambelana ne-engile yokusilela kwe-shear, ngoko ke iipropati zayo zokugoba, ukuxinana, ukucinezela kunye nokungajiki azilunganga njengepayipi ye-LSAW. Kwangaxeshanye, ngenxa yokunqongophala kwendawo yokuwelda, umthungo wokuwelda we-saddle kunye ne-fish ridge uchaphazela imbonakalo. Ke ngoko, i-NDT yee-welds zepayipi ze-SSAW kufuneka ziqiniswe ukuqinisekisa umgangatho wokuwelda, kungenjalo umbhobho we-SSAW akufuneki usetyenziswe kwiziganeko ezibalulekileyo zesakhiwo sentsimbi.
Ixesha lokuthumela: Julayi-13-2022