Kayan jikin guga na wY25 excavator shine Q345, wanda ke da kyakkyawan walƙiya.Kayan haƙori na guga shine ZGMn13 (ƙarfe mai girma na manganese), wanda shine austenite lokaci-lokaci a babban zafin jiki kuma yana da ƙarfi mai ƙarfi da juriya mai ƙarfi a ƙarƙashin tasirin tasiri saboda aikin hardening na saman Layer.Amma wannan karfe weldability ne matalauta: daya ne a cikin waldi zafi-tasiri zone hazo na carbide lalacewa ta hanyar abu embrittlement;na biyu shi ne tsattsagewar thermal na walda, musamman ma a kusa da yankin kabu na liquefaction.
1.zafi-shafi zone hazo carbide lalacewa ta hanyar embrittlement
ZGMn13 babban ƙarfe na manganese na iya haɓaka carbide tare da iyakar hatsi lokacin da aka sake yin zafi fiye da 250 ℃, ta yadda ƙarfin kayan ya ragu sosai kuma kyakkyawan aikin babban ƙarfe na manganese ya lalace sosai.Bayan bincike, lokacin da babban manganese karfe da aka mai tsanani sake da sanyaya gudun ne sauri, carbide zai fara hazo a hatsi iyaka, kuma tare da tsawo na zama lokaci, da carbide a hatsi iyaka zai canza daga katse barbashi jihar zuwa raga. rarraba, kuma gaggautsa zai karu sosai.Saboda haka, a lokacin da babban manganese karfe a waldi ko reheating bayan waldi, zai kasance a cikin waldi zafi-shafi yankin na wani sashe na hazo na carbide zuwa sãɓãwar launukansa digiri, kuma yana iya zama martensitic canji, ba kawai sa kayan gaggautsa, amma kuma. rage juriya na lalacewa da tasiri mai ƙarfi.Kuma, a cikin yankin da zafi ya shafa mai sauƙi don haɓaka kewayon zafin jiki na carbide (650 ℃ ko makamancin haka) tsawon lokacin zama, ƙarin hazo na carbide.
Don rage hazo na carbide da kuma hana abu daga rasa tauri da kuma zama gaggautsa, ya kamata a dauki matakai don hanzarta da sanyaya kudi, wato, don rage lokacin zama a high yanayin zafi.A saboda wannan dalili, da excavator guga jiki da guga hakora waldi don amfani da gajeren sashe waldi, intermittent waldi, soaking ruwa waldi, da dai sauransu.
2.Welding thermal fatattaka
Hana fashewar thermal shine rage abun ciki na S da P a cikin tushe na ƙarfe ko kayan walda;Hakanan zai iya ɗaukar matakan rage damuwa na walda daga tsarin walda, kamar yin amfani da gajeren sashe walda, walda ta wucin gadi, waldawar watsawa da guduma bayan walda.A cikin guga mai rufin ƙarfe mai babban ƙarfe na manganese, zaku iya fara walda Layer na Cr-ni, Cr-ni-Mn ko Cr-Mn austenitic karfe don keɓe tashar walda, na iya hana tsagewa.
Excavator guga jiki da guga hakora waldi tsari
1.Shiri kafin walda
Da farko, cire tsofaffin haƙoran bokiti daga jikin guga, sannan a yi amfani da injin niƙa don goge haƙoran guga mai tsabta, babu laka, tsatsa, sannan a bincika a hankali ko akwai tsagewa da sauran lahani;bude bevel da carbon arc gas planer a guga haƙoran da za a welded, da kuma tsaftace sama da kwana grinder.
2.Welding
① farko a cikin guga jiki (da guga hakori gidajen abinci) tare da GBE309-15 waldi lantarki ga mai rufi waldi, walda lantarki bukatar zama 350 ℃, 15h bushewa kafin waldi, waldi halin yanzu ya zama babba, waldi gudun ne dan kadan hankali don tabbatar da cewa. abun ciki na nickel zone na fusion na 5% zuwa 6%, don hana haɓakar martensite mai ƙima.
② Gudanar da saka walda.Bayan an tattara haƙoran guga a wuri, ana amfani da sandar walda D266 tare da diamita na 32MM don daidaita yanayin walƙiya a bangarorin biyu, tsayin weld ɗin bai wuce 30MM ba.sanyaya ruwa da guduma nan da nan bayan walda.
③Kasa walda.Yi amfani da 32MM diamita D266 sandar walda don kasa walda.Yi amfani da ƙarancin halin yanzu, DC juyi polarity, walda mai tsaka-tsaki.
Lokacin aikawa: Agusta-04-2022