Iintanda ezininzi
Kwi-front crystallization front, phantsi kwesenzo sokushisa okuphezulu kunye noxinzelelo, iziphene ze-lattice zihamba kwaye zidibanise ukwenza umda wesibini, okwimeko yeplastiki ephantsi kwiqondo lokushisa eliphezulu, kwaye iintanda zenziwe phantsi kwesenzo soxinzelelo.Iintanda ezininzi zenzeke kwiiwelds zentsimbi ecocekileyo okanye i-alloys yesigaba esisodwa se-austenitic okanye kwindawo ye-seam, kwaye zezohlobo lweentanda ezishushu.
Phinda ufudumeze iiNceba
Kwiintsimbi ezinesakhiwo esidityanisiweyo secwecwe kunye nezinye izinto zokuqinisa imvula, iintanda ezenzeka kwiindawo ezirhabaxa ze-welding ezichaphazeleke bubushushu ngexesha loxinzelelo lonyango lobushushu okanye inkonzo kwiqondo lobushushu elithile zibizwa ngokuba ziintanda zokufudumeza kwakhona.Ukufudumeza kwakhona iintanda zenzeke kwiindawo ezinqabileyo ze-welding zone ezichaphazelekayo zokushisa ze-low-alloy high-strength steels, iintsimbi ze-pearlitic ezimelana nobushushu, i-austenitic stainless steels kunye nezinye i-alloys ezisekelwe kwi-nickel.
Iintanda ezibandayo
Ukuqhekeka okubandayo luhlobo oluqhelekileyo lweentanda eziveliswa kwi-welding, eziveliswa xa ubushushu bupholile kwiqondo lokushisa eliphantsi emva kwe-welding.Iintanda ezibandayo zenzeke kwindawo yokushisa echaphazelekayo yentsimbi ephantsi, intsimbi ephakathi, ikhabhoni ephakathi kunye nentsimbi ephezulu yekhabhoni.Kwiimeko zomntu ngamnye, njengaxa udityaniswa neentsimbi ezinobukhulu obuphezulu okanye iialloys ezithile ze-titanium, iintanda ezibandayo zikwavela kwintsimbi edibeneyo.
Ngokweentlobo ezahlukeneyo zentsimbi kunye nolwakhiwo oluya kuthi ludityaniswe, kukwakho neentlobo ezahlukeneyo zokuqhekeka okubandayo, ezinokwahlulwa ngokwezi ndidi zintathu zilandelayo:
Ilibazisekile iCrack
Yindlela eqhelekileyo yeentanda ezibandayo.Isici sayo esiphambili kukuba ayibonakali ngokukhawuleza emva kwe-welding, kodwa inexesha eliqhelekileyo lokufukamela, kwaye i-crack eneempawu zokulibaziseka ezenziwe phantsi kwesenzo esidibeneyo sesakhiwo esinzima, i-hydrogen kunye noxinzelelo lokuthintela.
Ukucima iiNtanda
Olu hlobo lokuqhekeka ngokusisiseko alulibazisekanga, lufumaneka ngokukhawuleza emva kwe-welding, ngamanye amaxesha lwenzeka kwi-weld, ngamanye amaxesha lwenzeka kwindawo echaphazelekayo yobushushu.Ikakhulu kukho isakhiwo esinzima, iintanda ezenziwe phantsi kwesenzo soxinzelelo lwe-welding.
IPlastiki ephantsi embrittlement Crack
Kwezinye izinto ezineplastiki ephantsi, xa kubanda ukuya kwiqondo lokushisa eliphantsi, uxinzelelo olubangelwa ngamandla okunciphisa ludlula ugcino lweplastiki yento ngokwayo okanye iintanda ezibangelwa yimpahla ibe yi-brittle.Ngenxa yokuba iveliswa kubushushu obuphantsi, ikwayenye indlela yokuqhekeka okubandayo, kodwa akukho nto ibambekayo.
Ukukrazula kweLaminar
Kwinkqubo yokuvelisa amaqonga amakhulu okuvelisa i-oyile kunye neenqanawa zoxinzelelo ezityebileyo ezinodonga olungqingqwa, ukuqhekeka kwamanyathelo ahambelana nolwalathiso lokuqengqeleka ngamanye amaxesha kwenzeka, okubizwa ngokuba yi-laminar tearing.
Ikakhulu ngenxa yobukho bezinto ezifakwayo (ezisecaleni kwendlela yokuqengqeleka) ngaphakathi kwipleyiti yentsimbi, uxinzelelo olwenziwe ngexesha le-welding luyi-perpendicular ukuya kwisalathiso sokuqengqeleka, nto leyo ekhokelela kwimilo ethi "yanyathelwa" kwindawo echaphazeleke bubushushu kude nomlilo. ikrazukileyo.
Uxinzelelo lwe-Corrosion Cracking
Ukulibaziseka kokuqhekeka kwezakhiwo ezithile ezidityanisiweyo (ezifana neenqanawa kunye nemibhobho) phantsi kwesenzo esidityanisiweyo seendaba ezitshabalalisayo kunye noxinzelelo.Izinto ezichaphazela uxinzelelo lwe-corrosion cracking ziquka izinto zesakhiwo, uhlobo lwe-corrosive medium, imilo yesakhiwo, inkqubo yokuvelisa kunye ne-welding, i-welding material, kunye neqondo lokunciphisa uxinzelelo.Ukonakala koxinzelelo lwenzeka ngexesha lenkonzo.
Ixesha lokuposa: Apr-24-2022