Iyo bucket body material ye wY25 excavator ndeye Q345, ine yakanaka weldability. Iyo bhaketi zino rezino iZGMn13 (yakakwira manganese simbi), iri single-phase austenite pakupisa kwepamusoro uye ine kusimba kwakanaka uye yakakwirira kupfeka kuramba pasi pesimba rekuita nekuda kwekushanda kuoma kwepasi. Asi simbi iyi weldability yakashata: imwe iri muwelding inopisa-yakakanganiswa zone kunaya kwecarbide kunokonzerwa nekuputirwa kwezvinhu; chechipiri ndeye weld thermal cracking, kunyanya munzvimbo yepedyo ye seam zone liquefaction crack.
1.heat-affected zone precipitation carbide inokonzerwa ne embrittlement
ZGMn13 high manganese simbi inogona kupinza carbide pamuganhu wezviyo kana ichipisa zvakare kupfuura 250 ℃, kuitira kuti kuoma kwezvinhu kuderedzwa zvakanyanya uye kushanda kwakanaka kwesimbi yakakwira manganese kukuvadzwa zvakanyanya. Mushure mekuongorora, kana iyo yakakwira manganese simbi inopisa zvakare uye kukurumidza kutonhora kuri kukurumidza, carbide inotanga kunaya pamuganho wezviyo, uye nekuwedzera kwenguva yekugara, iyo carbide pamuganhu wezviyo ichachinja kubva kune discontinuous particle state kuenda kune mesh kugovera, uye brittleness yayo ichawedzera zvakanyanya. Naizvozvo, kana iyo yakakwira manganese simbi muwelding kana kudziyisazve mushure mewelding, ichange iri munzvimbo yewelding inopisa-yakakanganiswa zone yechikamu chekunaya kwecarbide kune madhigirii akasiyana, uye inogona kunge iri martensitic shanduko, kwete kungoita kuti zvinhu zvive brittle, asi zvakare kuderedza kusakara kwayo uye kukanganisa kuoma. Uye, munzvimbo inobatwa nekupisa iri nyore kudonha tembiricha ye carbide (650 ℃ kana zvakadaro) iyo yakareba nguva yekugara, iyo yakawanda carbide kunaya.
Kuti uderedze kunaya kwecarbide uye kudzivirira zvinhu kubva pakurasikirwa nekuoma uye kuita brittle, matanho anofanirwa kutorwa kuti akurumidze kutonhora, ndiko kuti, kupfupisa nguva yekugara pakupisa kwakanyanya. Nechikonzero ichi, iyo yekuchera bhaketi muviri uye bhaketi mazino welding kushandisa pfupi chikamu welding, intermittent welding, kunyura mvura welding, nezvimwe.
2.Welding thermal cracking
Kudzivirira kupisa kwekupisa ndiko kuderedza zvirimo zveS uye P mubhesi resimbi kana weld zvinhu; inogona zvakare kutora matanho ekudzikisa kushushikana kwewelding kubva pawelding process, sekushandiswa kwechikamu chepfupi welding, intermittent welding, dispersion welding and hammering after welding. Mubhaketi remuviri wakavharira welding yakakwira manganese simbi, unogona kutanga weld layer yeCr-ni, Cr-ni-Mn kana Cr-Mn austenitic simbi yekuzviparadzanisa welding chiteshi, inogona kudzivirira kupaza.
Excavator bhaketi muviri uye bhakiti mazino welding process
1.Kugadzirira usati welding
Chokutanga pane zvose, bvisa mazino emubhakiti akasakara kubva mumuviri webhakiti, uye ipapo shandisa grinder yekona kuti uposhese kuiswa kwemazino ebhaketi akachena, pasina dhaka, ngura, uye nyatsoongorora kana pane kuputika uye zvimwe zvikanganiso; vhura bevel nekabhoni arc gas planer pamazino emubucket kuti asungiswe, uye chenesa neikona grinder.
2.Welding
① kutanga mumuviri wemubhaketi (uye mazino emubhaketi) ane GBE309-15 welding electrodes ye overlay welding, welding electrodes inofanirwa kunge iri 350 ℃, 15h kuomeswa pamberi pewelding, welding current inofanira kunge yakakura, welding speed inonoka zvishoma kuti ive nechokwadi chekuti fusion zone nickel yemukati ye5% kudzivirira kutsemuka kwe5% kudzivirira kutsemuka.
② Kuitisa positioning welding. Mushure mekunge mazino emugomo aunganidzwa panzvimbo, D266 welding tsvimbo ine dhayamita ye32MM inoshandiswa kune symmetrical positioning welding kumativi ose maviri, kureba kweweld hakupfuuri 30MM. kutonhora kwemvura uye kusando pakarepo mushure mekunama.
③Welding yepasi. Shandisa 32MM dhayamita D266 welding tsvimbo ye bottoming welding. Shandisa yakaderera ikozvino, DC reverse polarity, intermittent welding.
Nguva yekutumira: Aug-04-2022