Thepa ea 'mele ea bakete ea moepolli oa wY25 ke Q345, e nang le ts'ebetso e ntle ea ho cheseha. Thepa ea leino la bakete ke ZGMn13 (tšepe e phahameng ea manganese), e leng karolo e le 'ngoe ea austenite ka mocheso o phahameng' me e na le boima bo botle le ho hanyetsa ho roala ho phahameng tlas'a tšusumetso e matla ka lebaka la ho thatafala ha lera la holim'a metsi. Empa ts'ebetso ena ea tšepe e futsanehile: e 'ngoe e sebakeng sa welding e anngoeng ke mocheso pula ea carbide e bakoang ke embrittlement ea lintho tse bonahalang; Ea bobeli ke ho phatloha ho hoholo ha mocheso, haholo-holo sebakeng se haufi le seam zone liquefaction crack.
1.heat-affected zone precipitation carbide e bakoang ke embrittlement
ZGMn13 tšepe e phahameng ea manganese e ka fokotsa carbide haufi le moeli oa lijo-thollo ha e futhumatsoa hape ho feta 250 ℃, e le hore ho tiea ha thepa ho fokotsehe haholo 'me ts'ebetso e babatsehang ea tšepe e phahameng ea manganese e senyehe haholo. Ka mor'a tlhahlobo, ha tšepe e phahameng ea manganese e futhumatsoa hape 'me lebelo la ho pholisa le potlakile, carbide e tla qala ho theoha moeling oa lijo-thollo,' me ka ho atolosoa ha nako ea bolulo, carbide moeling oa lijo-thollo e tla fetoha ho tloha boemong bo sa khaotseng ho ea ho letlooeng. kabo, 'me brittleness ea eona e tla eketseha haholo. Ka hona, ha tšepe e phahameng ea manganese ka tjheseletsa kapa ho futhumatsa ka mor'a ho cheselletsa, e tla ba sebakeng sa tjheseletsa se amehang mocheso oa karolo ea pula ea carbide ho ea ka likhato tse sa tšoaneng, 'me e ka ba phetoho ea martensitic, eseng feela ho etsa hore thepa e be brittle, empa hape. fokotsa ho hanyetsa ha eona le ho ba le tšusumetso e matla. 'Me, sebakeng se anngoeng ke mocheso ho bonolo ho fokotsa mocheso oa carbide (650 ℃ kapa ho feta) ha nako e telele ea bolulo, ho na le pula e ngata ea carbide.
E le ho fokotsa pula ea carbide le ho thibela thepa hore e se ke ea lahleheloa ke boima le ho fetoha brittle, mehato e lokela ho nkoa ho potlakisa sekhahla sa ho pholisa, ke hore, ho khutsufatsa nako ea bolulo ka mocheso o phahameng. Ka lebaka lena, 'mele oa bakete ea excavator le meno a libakete ho sebelisa welding e khuts'oane, welding ea nakoana, welding ea metsi, joalo-joalo.
2.Welding ho phatloha ha mocheso
Thibela ho phunyeha ha mocheso ke ho fokotsa litaba tsa S le P ka tšepe ea motheo kapa lisebelisoa tsa weld; e ka boela ea nka mehato ea ho fokotsa khatello ea maikutlo ho tloha ts'ebetsong ea ho tjheseletsa, joalo ka tšebeliso ea karolo e khutšoanyane ea ho tjheseletsa, ho tjheseletsa ha nakoana, ho qhalakanya ho tjheseletsa le ho hamore ka mor'a ho cheselletsa. Ka 'mele oa bakete o koahelang tšepe e phahameng ea manganese, o ka qala ka ho tjheseletsa tšepe ea Cr-ni, Cr-ni-Mn kapa Cr-Mn austenitic bakeng sa mocha oa ho itšehla thajana, o ka thibela ho phatloha.
Mokhoa oa ho tjheseletsa bakete ea 'mele oa bakete le meno a bakete
1.Ho itokisa pele ho tjheseletsa
Pele ho tsohle, tlosa meno a bakete a tsofetseng ho tloha 'meleng oa bakete, ebe o sebelisa grinder ea angle ho bentša ho kenngoa ha meno a nkho, ha ho na seretse, mafome, le ho hlahloba ka hloko hore na ho na le mapetsong le mefokolo e meng; bula bevel ka carbon arc gas planer menong a bakete hore a chesetsoe, 'me u hloekise ka grinder ea angle.
2.Welding
① pele ka 'mele oa bakete (le manonyeletso a leino la bakete) a nang le li-electrode tsa GBE309-15 bakeng sa ho tjheseletsa holimo, li-electrode tsa welding li hloka ho ba 350 ℃, ho omisa ka lihora tse 15 pele ho tjheseletsa, hona joale oa welding e lokela ho ba kholo, lebelo la welding le lieha hanyane ho netefatsa hore fusion zone nickel content ea 5% ho isa ho 6%, ho thibela tlhahiso ea crack-sensitive martensite.
② Ho tsamaisa welding sebakeng. Ka mor'a hore meno a bakete a bokelloe sebakeng, molamu oa ho tjheseletsa oa D266 o nang le bophara ba 32MM o sebelisetsoa ho tjheseletsa ka mahlakoreng ka bobeli, bolelele ba weld ha bo fete 30MM. ho pholisa metsi le ho hamore hang ka mora ho tjheseletsa.
③Welding e tlase. Sebelisa 32MM bophara D266 thupa bakeng sa tjheseletsa bottoming. Sebelisa polarity e tlase ea hajoale, DC reverse polarity, welding ea nakoana.
Nako ea poso: Aug-04-2022