Ka nts'etsopele ea liindasteri tse kang tšepe le tšepe, indasteri ea petrochemical, likepe le matla a motlakase, mehaho e nang le welded e atisa ho ntshetsa pele ka tsela ea mekhoa e meholo, e kholo le e phahameng, 'me ba bang ba ntse ba sebetsa ka mocheso o tlaase, cryogenic, mecha ea phatlalatso e senyang le libaka tse ling.
Ka hona, litšepe tse sa tšoaneng tse nang le matla a phahameng a tlaase, litšepe tse mahareng le tse phahameng, litšepe tse matla haholo, le lisebelisoa tse sa tšoaneng tsa alloy li ntse li sebelisoa ka ho eketsehileng.Leha ho le joalo, ka tšebeliso ea limaraka tsena tsa tšepe le li-alloys, mathata a mangata a macha a tlisoa ka tlhahiso ea welding, eo har'a eona e tloaelehileng le e tebileng haholo e leng mapetsong a tjheseletsa.
Ka linako tse ling mapetsong a hlaha nakong ea ho cheselletsa 'me ka linako tse ling nakong ea ho behoa kapa ho sebetsa, ho thoeng ke mapetsong a liehang.Kaha mapetso a joalo a ke ke a bonoa ha a etsoa, mapetsong a joalo a kotsi le ho feta.Ho na le mefuta e mengata ea mapetsong a hlahisoang ts'ebetsong ea welding.Ho ea ka lipatlisiso tsa morao-rao, ho ea ka mofuta oa mapheo, a ka aroloa ka mekhahlelo e mehlano e latelang:
1. Ho phatloha ho chesang
Li-cracks tse chesang li hlahisoa ka mocheso o phahameng nakong ea ho cheselletsa, kahoo li bitsoa ho phatloha ho chesang.Ho itšetlehile ka thepa ea tšepe e lokelang ho chesetsoa, sebopeho, mocheso oa mocheso le mabaka a ka sehloohong a mapetsong a chesang a hlahisoang le tsona li fapane.Ka hona, mapheo a chesang a arotsoe ka mekhahlelo e meraro: ho phunyeha ha crystallization, ho phatloha ha liquefaction le ho phunyeha ha polygonal.
1. Mapetso a kristale
Nakong ea morao-rao ea crystallization, filimi ea mokelikeli e entsoeng ke eutectic e fokolang e fokolisa kamano pakeng tsa lijo-thollo, 'me mapetsong a hlaha tlas'a ketso ea khatello ea kelello.
E hlaha haholo litšepeng tsa tšepe ea k'habone le tšepe ea alloy e tlase e nang le litšila tse ngata (litekanyo tse phahameng tsa sebabole, phosphorus, tšepe, k'habone le silicon) le litšepe tsa tšepe ea karolo e le 'ngoe ea austenitic, li-alloys tse thehiloeng ho nickel le lisebelisoa tse ling tsa aluminium. bohareng.Maemong a motho ka mong, mapetsong a kristale a ka boela a hlaha sebakeng se amehileng ke mocheso.
2. Mocheso o phahameng oa liquefaction crack
Tlas'a ketso ea tlhōrō ea mocheso oa mocheso oa mocheso oa tjheseletsa, ho qhibiliha ho etsahala pakeng tsa sebaka se amehileng ke mocheso le likarolo tsa li-welding tse ngata, 'me mapetsong a hlahisoa tlas'a ketso ea khatello ea kelello.
E hlaha haholo ka litšepe tse matla a phahameng tse nang le chromium le nickel, litšepe tsa austenitic, le lialloi tse ling tse thehiloeng ho nickel sebakeng se haufi sa seam kapa lipakeng tsa li-welds tse ngata.Ha litaba tsa sebabole, phosphorus le silicon carbon ka tšepe ea motheo le terata ea welding li phahame, tšekamelo ea ho phatloha ha liquefaction e tla eketseha haholo.
Nako ea poso: Apr-18-2022