Ubudlelwane phakathi kwesantya welding kunye nomgangatho weld

Ubudlelwane phakathi kwesantya se-welding kunye nekhwalithi ye-weld kufuneka iqondwe ngokwe-dialectically kwaye ingahoywa. Ikakhulu ibonakaliswe kwinqanaba lokufudumala kunye ne-crystallization stage.

Inqanaba lokufudumeza: Phantsi kwemeko ye-high-frequency straight seam welded pipe, umda wombhobho ongenanto ushushu ukusuka kwiqondo lokushisa ukuya kwiqondo lokushisa. Ngeli xesha, umda wombhobho ongenanto awukhuselwanga kwaye ubonakaliswe ngokupheleleyo emoyeni, onokuthi ngokuqinisekileyo uphendule ngokukhawuleza nge-oksijeni, i-nitrogen, njl. emoyeni, ebangela ukwanda okukhulu kwe-nitrogen kunye nee-oksidi kwi-weld seam. Ngokwemilinganiselo, umxholo we-nitrogen kwi-weld seam yanda ngamaxesha angama-20-45, kwaye umxholo we-oxygen ukhula ngamaxesha angama-7-35; Kwangaxeshanye, izinto ezixubeneyo ezifana nemanganese kunye nekhabhoni eziluncedo kumthungo we-weld zitshiswa kakhulu kwaye zibe ngumphunga, okukhokelela ekuncipheni kweempawu zomatshini we-weld seam. Ukusuka kule nto, kunokubonwa ukuba kule ngqiqo, ukucotha kwesantya se-welding, kubi kakhulu umgangatho we-weld seam. Ngaphezu koko, ixesha elide i-billet evuthayo ibonakala emoyeni, isantya se-welding sicotha, esinokubangela ukubunjwa kwee-oxide ezingezona zetsimbi kwiingqimba ezinzulu. Ezi oxides ezinzulu ezingezizo ezentsimbi kunzima ukukhama ngokupheleleyo ngaphandle kwe-weld seam ngexesha lenkqubo elandelayo ye-crystallization ye-extrusion, kwaye ihlale kwi-weld seam ngendlela ye-non-metallic inclusions emva kwecrystallization, yenze ujongano olubuthathaka olutshabalalisayo. ukuqhubeka kwesakhiwo se-weld seam kunye nokunciphisa amandla e-weld seam. Kwaye isantya se-welding sikhawuleza, ixesha le-oxidation lifutshane, kwaye ii-oxide ezingezizo ezentsimbi eziveliswayo zincinci kwaye zikhawulelwe kumaleko angaphezulu. Kulula ukucudiswa ngaphandle kwe-weld seam ngexesha lenkqubo ye-extrusion elandelayo, kwaye akuyi kubakho intsalela ye-non-metallic oxide kwi-weld seam, okukhokelela kumandla aphezulu we-weld.

Isigaba se-Crystallization: Ngokwemigaqo ye-metallurgy, ukuze ufumane i-welds yamandla aphezulu, kuyimfuneko ukucokisa ukwakheka kweenkozo ze-weld kangangoko kunokwenzeka; Indlela esisiseko yokucoca kukwenza i-crystal nuclei eyaneleyo ngexesha elifutshane, ukwenzela ukuba badibane nomnye ngaphambi kokuba bakhule kakhulu kwaye baphelise inkqubo ye-crystallization. Oku kufuna ukwandisa isantya se-welding ukususa ngokukhawuleza i-weld kwindawo yokufudumeza, ukwenzela ukuba i-weld ikwazi ukukhawuleza ngokukhawuleza kwiqondo eliphezulu lokupholisa; Xa iqondo le-undercooling linyuka, isantya se-nucleation sinokunyuka kakhulu, ngelixa izinga lokukhula landa ngaphantsi, ngaloo ndlela kufezekiswa injongo yokucoca ubungakanani beenkozo ze-weld seam. Ke ngoko, nokuba ijongwe kwinqanaba lokufudumeza inkqubo ye-welding okanye ukupholisa emva kwe-welding, i-weldin ikhawuleza kakhulu.isantya se-g, ngcono umgangatho we-weld seam, ngaphandle kokuba iimeko ze-welding ezisisiseko zihlangene.