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Thupi la Excavator ndi mano a ndowa kuwotcherera ndi njira yokonza luso

Chidebe cha thupi la wY25 excavator ndi Q345, chomwe chili ndi weldability wabwino.Zida za dzino la ndowa ndi ZGMn13 (chitsulo chokwera cha manganese), chomwe chimakhala ndi gawo limodzi la austenite pa kutentha kwakukulu ndipo chimakhala cholimba komanso kukana kuvala kwakukulu pansi pa katundu wokhudzidwa chifukwa cha kuuma kwa pamwamba.Koma weldability chitsulo ichi ndi osauka: mmodzi ali mu kuwotcherera kutentha anakhudzidwa zone mpweya wa carbide chifukwa embrittlement zinthu;chachiwiri ndi kuwotcherera matenthedwe akulimbana, makamaka pafupi msoko zone liquefaction crack.

1.kutentha kwa zone mpweya carbide chifukwa embrittlement
ZGMn13 mkulu wa manganese chitsulo akhoza precipitate carbide m'malire a tirigu akatenthedwa kachiwiri kupitirira 250 ℃, kotero kuti kulimba kwa zinthu kuchepetsedwa kwambiri ndi ntchito yabwino ya mkulu manganese zitsulo kuwonongeka kwambiri.Pambuyo pofufuza, pamene chitsulo cha manganese chikatenthedwanso ndipo liwiro lozizira limakhala lofulumira, carbide idzayamba kuthamanga pamalire a tirigu, ndipo ndi kukulitsa nthawi yokhalamo, carbide pa malire a tirigu idzasintha kuchoka ku discontinuous tinthu kupita ku mauna. kugawa, ndipo brittleness yake idzawonjezeka kwambiri.Choncho, pamene mkulu manganese zitsulo mu kuwotcherera kapena reheating pambuyo kuwotcherera, adzakhala mu kuwotcherera kutentha anakhudzidwa zone wa gawo la mpweya wa carbide ku madigiri osiyanasiyana, ndipo angakhale martensitic kusintha, osati kupanga zinthu Chimaona, komanso Chimaona. kuchepetsa kukana kwake kuvala komanso kulimba kwake.Ndipo, m'madera omwe amakhudzidwa ndi kutentha kosavuta kusinthasintha kutentha kwa carbide (650 ℃ kapena kupitirira apo) nthawi yotalikirapo yokhalamo, kumapangitsanso mvula yambiri ya carbide.
Pofuna kuchepetsa mvula ya carbide ndikuletsa zinthu kuti zisawonongeke komanso kuti zikhale zowonongeka, ziyenera kuchitidwa kuti muchepetse kuzizira, ndiko kuti, kufupikitsa nthawi yokhalamo pa kutentha kwakukulu.Pachifukwa ichi, ndi excavator chidebe thupi ndi ndowa kuwotcherera ntchito yochepa chigawo kuwotcherera, pakapatsirana kuwotcherera, akuwukha madzi kuwotcherera, etc.

2.Kuwotcherera kutentha kwapakati
Kupewa matenthedwe akulimbana ndi kuchepetsa zili S ndi P m'munsi zitsulo kapena weld zakuthupi;amathanso kuchitapo kanthu kuti achepetse kupsinjika kwa kuwotcherera kuchokera pakuwotcherera, monga kugwiritsa ntchito kuwotcherera kwa gawo lalifupi, kuwotcherera kwapakatikati, kuwotcherera kwa kubalalitsidwa ndi kuwotcherera pambuyo pakuwotcherera.Mu chidebe chophimbidwa ndi kuwotcherera chitsulo chachikulu cha manganese, mutha kuwotcherera wosanjikiza wa Cr-ni, Cr-ni-Mn kapena Cr-Mn austenitic chitsulo chodzipatula chowotcherera njira, mutha kupewa kusweka.

Excavator ndowa thupi ndi ndowa mano kuwotcherera

1.Kukonzekera musanayambe kuwotcherera
Choyamba, chotsani mano a chidebe chophwanyika m'thupi la ndowa, ndiyeno gwiritsani ntchito chopukusira chopukutira kupukuta kuyika kwa mano a ndowa, opanda matope, dzimbiri, ndikuyang'ana mosamala ngati pali ming'alu ndi zolakwika zina;Tsegulani bevel ndi mpweya wa carbon arc planer pa mano a ndowa kuti muwotchedwe, ndipo yeretsani ndi chopukusira ngodya.

2.Kuwotcherera
① woyamba mu ndowa thupi (ndi zimfundo chidebe dzino) ndi GBE309-15 kuwotcherera maelekitirodi kwa kuwotcherera pamwamba, kuwotcherera maelekitirodi ayenera kukhala 350 ℃, 15h kuyanika pamaso kuwotcherera, kuwotcherera panopa ayenera kukhala lalikulu, kuwotcherera liwiro ndi pang'onopang'ono kuonetsetsa kuti fusion zone nickel zili 5% mpaka 6%, kuti aletse kupanga martensite okhudzidwa ndi crack.
② Kuchititsa kuwotcherera poyimitsa.Pambuyo mano chidebe anasonkhana m'malo, D266 kuwotcherera ndodo ndi awiri a 32MM ntchito symmetrical udindo kuwotcherera mbali zonse, kutalika kwa weld si upambana 30MM.kuziziritsa kwa madzi ndi kumenyetsa mutangotha ​​kuwotcherera.
③Kuwotcherera pansi.Gwiritsani ntchito ndodo yowotcherera ya 32MM m'mimba mwake ya D266 powotcherera pansi.Gwiritsani ntchito magetsi otsika, DC reverse polarity, kuwotcherera kwapakatikati.


Nthawi yotumiza: Aug-04-2022