Porosity igomba rinoumbwa apo mabhuru ari mudziva rakanyungudutswa anotadza kubuda panguva yekuoma panguva yewelding. Kana welding neJ507 alkaline electrode, pane kazhinji nitrogen pores, hydrogen pores uye CO pores. Iyo flat welding chinzvimbo ine ma pores akawanda kupfuura mamwe zvigaro; kune zvidimbu zvehwaro zvakawanda kupfuura kuzadza uye kuvhara nzvimbo; kune marefu arc weldings kupfuura mapfupi arc weldings; kune zvakawanda zvakakanganiswa arc weldings pane inoenderera mberi arc weldings; uye kune akawanda arc kutanga, arc kuvhara uye nzvimbo dzakabatana pane welding. Kune dzimwe nzvimbo dzakawanda dzekusona. Kuvapo kwepores hakuzongoderedze kuwanda kweiyo weld uye kunetesa iyo inoshanda yepakati-chikamu nzvimbo yeweld, asi zvakare kuderedza simba, plastiki uye kuoma kweiyo weld. Zvinoenderana nehunhu hwekudonhedza kuchinjisa kweJ507 welding tsvimbo, isu tinosarudza iyo welding simba sosi, yakakodzera welding ikozvino, inonzwisisika arc kutanga nekuvhara, pfupi arc mashandiro, mutsara tsvimbo yekufambisa uye zvimwe zvinhu zvekutonga, uye kuwana yakanaka yemhando vimbiso mukugadzira welding. .
1. Kuumbwa kwe stomata
Simbi yakanyungudutswa inonyungudutsa huwandu hwakawanda hwegasi pakudziya kwakanyanya. Sezvo tembiricha inodzikira, magasi aya anobuda zvishoma nezvishoma kubva muweld ari mabhuru. Iyo gasi iyo isina nguva yekupukunyuka inoramba iri mu weld uye inoumba pores. Magasi anoumba pores anonyanya kusanganisira hydrogen uye carbon monoxide. Kubva pakugoverwa kwe stomata, kune imwechete stomata, inopfuurira stomata, uye dense stomata; kubva panzvimbo ye stomata, vanogona kukamurwa kuva kunze stomata uye mukati stomata; kubva pachimiro, pane pinholes, round stomata, uye strip stomata (iyo stomata ine mitsetse-worm-shaped) , iyo inoramba ichitenderera pores), chain-like uye huchi pores, etc. Parizvino, inonyanya kufanana neJ507 ma electrodes kuti abudise hurema hwepore panguva yewelding. Nokudaro, kutora kusungirirwa kwesimbi yakaderera kabhoni neJ507 electrode semuenzaniso, dzimwe nhaurirano dzinoitwa pamusoro pehukama pakati pezvikonzero zvinokonzera kukanganisa kwepore uye nzira yekugadzira.
2.Unhu hweJ507 welding rod droplet transfer
J507 welding rod is a low-hydrogen welding rod ine high alkalinity. Iyi welding tsvimbo inogona kushandiswa zvakajairwa kana iyo DC welding muchina ichidzosera polarity. Naizvozvo, zvisinei kuti rudzii rweDC welding muchina unoshandiswa, iyo droplet shanduko inobva munzvimbo yeanode kuenda kunzvimbo yecathode. Mune general manual arc welding, tembiricha yenzvimbo yecathode yakadzikira zvishoma pane tembiricha yenzvimbo yeanode. Naizvozvo, zvisinei kuti chimiro chekuchinja chii, tembiricha inodzikira mushure mekunge madonhwe asvika munzvimbo yecathode, zvichikonzera kuunganidzwa kwemadonhwe emhando iyi ye electrode uye kuchinjika kupinda mudziva rakanyungudutswa, ndiko kuti, fomu rekuchinja remadonhwe rinoumbwa. . Nekudaro, nekuti manual arc welding chinhu chemunhu: sekugona kweiyo welder, saizi yeazvino uye voltage, nezvimwewo, saizi yemadonhwe haina kuenzana, uye saizi yedziva yakanyungudutswa yakaumbwa haina kuenzana. . Nokudaro, kukanganisa kwakadai se pores kunoumbwa pasi pesimba rekunze uye mukati. Panguva imwecheteyo, iyo alkaline electrode coating ine yakawanda ye fluorite, iyo inoparadza fluorine ions ine yakakwirira ionization inogona pasi pechiito chearc, zvichiita kuti kugadzikana kwearc kuwedzere uye kunokonzera kusagadzikana kwemadonhwe ekufambisa panguva yekuputika. factor. Nokudaro, kuitira kuti tigadzirise dambudziko re porosity yeJ507 electrode manual arc welding, kunze kwekuomesa electrode uye kuchenesa groove, tinofanirawo kutanga nematanho etekinoroji kuti tive nechokwadi chekugadzikana kwearc droplet transfer.
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3. Sarudza iyo welding simba sosi kuti uve nechokwadi chakagadzikana arc
Sezvo J507 electrode coating ine fluoride ine yakakwirira ionization inogona, iyo inokonzera kusagadzikana mune arc gasi, zvinodikanwa kusarudza yakakodzera welding simba sosi. Iwo DC welding magetsi masosi atinowanzo shandisa akakamurwa kuita marudzi maviri: rotary DC arc welding muchina uye silicon rectifier DC welding muchina. Kunyangwe iwo ekunze maitiro macurves ese ari ekudzika hunhu, nekuti inotenderera DC arc welding muchina unozadzisa chinangwa chekugadzirisa nekuisa sarudzo yekufambisa danda, kubuda kwayo ikozvino waveform inotenderera mune yenguva dzose chimiro, inosungirwa kuve macroscopic chiitiko. Yakatemerwa ikozvino, microscopically, inobuda ikozvino inoshanduka nediki amplitude, kunyanya kana madonhwe achichinja, zvichiita kuti swing amplitude iwedzere. Silicon yakagadziridzwa DC welding michina inovimba nesilicon zvikamu zvekugadzirisa uye kusefa. Kunyange zvazvo kubuda kwazvino kuine nhongonya nemipata, kunowanzo kutsvedzerera, kana kuti pane kashoma kekuzungunuka mune imwe nzira, saka inogona kutariswa nguva dzose. Nokudaro, haina kukanganiswa nekuchinja kwedonhwe, uye kuchinja kwezvino kunokonzerwa nekuchinja kwedonhwe hakusi kukuru. Mubasa rewelding, zvakagumisirwa kuti silicon rectifier welding muchina une mukana wakaderera wepores pane wekutenderera DC arc welding muchina. Mushure mekuongorora mhedzisiro yebvunzo, zvinotendwa kuti kana uchishandisa J507 maelectrode ekushongedza, silicon yakasimba welding muchina inoyerera welding magetsi sosi inofanira kusarudzwa, iyo inogona kuvimbisa kugadzikana kwearc uye kudzivirira kuitika kwehurema hwepore.
4. Sarudza yakakodzera welding ikozvino
Nekuda kweiyo J507 electrode welding, iyo electrode ine zvakare yakawanda yakawanda yealloy element mu weld core kuwedzera kune iyo coating kuti iwedzere kusimba kweiyo weld joint uye kubvisa mukana wepore defect. Nekuda kwekushandiswa kweakakura welding ikozvino, dziva rakanyungudutswa rinowedzera kudzika, iyo metallurgical reaction yakanyanya, uye alloy zvinhu zvinopiswa zvakanyanya. Nemhaka yokuti ikozvino yakakura zvikuru, kupisa kwekudzivirira kweiyo welding core zvichava pachena kuwedzera zvakanyanya, uye electrode ichashanduka tsvuku, zvichiita kuti organic matter mu electrode coating iparadze nguva isati yakwana uye iite pores; nepo ikozvino idiki kwazvo. Kumhanyisa kwekristaro kwedziva rakanyungudutswa kunokurumidza, uye gasi riri mudziva rakanyungudutswa harina nguva yekubuda, zvichikonzera pores. Mukuwedzera, iyo DC reverse polarity inoshandiswa, uye tembiricha yenzvimbo yecathode yakaderera. Kunyange kana maatomu ehydrogen anogadzirwa panguva yemhirizhonga akanyungudutswa mudziva rakanyungudutswa, haakwanisi kukurumidza kutsiviwa nealloy elements. Kunyange kana gasi rehaidhirojeni richikurumidza kuyangarara kubva muweld, yakanyunguduka Dziva rinopisa zvakanyanyisa uye robva ratonhodzwa nekukasira, zvichiita kuti mamorekuru asara ehydrogen-forming aomesa mugomba rakanyungudutswa weld kuita pore defects. Saka, zvinodikanwa kufunga zvakakodzera welding ikozvino. Low-hydrogen welding rods kazhinji ine diki diki process ikozvino inosvika gumi kusvika 20% pane acid welding rods yezvakatsanangurwa zvakafanana. Muchiito chekugadzira, kune yakaderera-hydrogen welding tsvimbo, sikweya yedhayamita yetsvimbo yewelding yakapetwa negumi inogona kushandiswa seyereferensi yazvino. Semuenzaniso, iyo Ф3.2mm electrode inogona kuiswa pa 90 ~ 100A, uye Ф4.0mm electrode inogona kuiswa pa 160 ~ 170A seyereferensi ikozvino, iyo inogona kushandiswa sechikonzero chekusarudza maitiro ekugadzirisa kuburikidza nekuedza. Izvi zvinogona kuderedza kupisa kwekurasikirwa kwezvinhu zvealloy uye kudzivirira mukana wepores.
5. Inonzwisisika arc kutanga nekuvhara
J507 electrode welding joints inowanzoita pores kupfuura zvimwe zvikamu. Izvi zvinodaro nekuti tembiricha yemajoini inowanzodzikira zvishoma pane zvimwe zvikamu panguva yewelding. Nemhaka yokuti kuchinjwa kwetsvimbo yewelding itsva kwakonzera kupisa kwekupisa kwenguva yakati panzvimbo yekuvhara yearc yepakutanga, panogonawo kuva nehutu hwemunharaunda pamagumo emudonzvo mutsva we welding, zvichiita kuti pave nemapores akaoma pajoini. Kugadzirisa kukanganisa kwepore kunokonzerwa neizvi, kunze kwekushanda kwekutanga Pamusoro pekuisa iyo inofanirwa arc-yekutanga ndiro pamagumo ekutanga arc, pane imwe neimwe yepakati pakati, zvinyoro zvinyoro kupera kwe electrode imwe neimwe itsva pane arc. -kutanga ndiro kutanga arc kubvisa ngura pamagumo. Pajoini rega rega riri pakati, nzira yekurova arc yepamberi inofanira kushandiswa, ndiko kuti, mushure mekunge arc yarohwa 10 kusvika 20 mm pamberi pe weld uye yakagadzikana, inodzoserwa kumashure kune arc yekuvhara nzvimbo. mubatanidzwa kuitira kuti yepakutanga arc yekuvhara nzvimbo inogona kupiswa munharaunda kusvika iyo yakanyungudika yaumbwa. Mushure mekubatanidza, dzikisa arc uye uitenderedze kumusoro uye pasi 1-2 nguva kuti weld zvakajairika. Kana uchivhara arc, arc inofanira kuchengetwa ipfupi sezvinobvira kudzivirira dziva rakanyungudutswa kubva pakuzadza arc crater. Shandisa mwenje wearc kana kutenderera uchidzoka nekudzoka 2-3 nguva kuzadza arc crater kubvisa mapores anogadzirwa pakuvhara arc.
6. Pfupi arc kushanda uye mutsara kufamba
Kazhinji, J507 welding tsvimbo inosimbisa kushandiswa kwepfupi arc oparesheni. Chinangwa chekushanda kwearc pfupi ndechekudzivirira dziva rekugadzirisa kuitira kuti dziva rekugadzirisa mumamiriro ekupisa kwepamusoro-soro rirege kupindwa nemhepo yekunze uye kuburitsa pores. Asi mune mamiriro api mapfupi arc anofanirwa kuchengetedzwa, isu tinofunga zvinoenderana netsvimbo yewelding yezvakasiyana. Kazhinji arc pfupi inoreva chinhambwe icho kureba kwearc kunodzorwa kusvika 2/3 yedhayamita yetsvimbo yewelding. Nekuti chinhambwe chakanyanya kudiki, kwete chete dziva rekugadzirisa harigone kuoneka zvakajeka, asi zvakare rakaoma kushanda uye rinogona kukonzera kupfupika uye kutsemuka kwearc. Hapana yakakwirira kana yakaderera zvakanyanya inogona kuzadzisa chinangwa chekuchengetedza dziva remhinduro. Zvinokurudzirwa kutakura mitsetse mumutsara wakatwasuka pakutakura mitsetse. Kuwedzeredza kumashure nekumashure kuzungunuka kuchakonzera kuchengetedzwa kwakashata kwedziva remhinduro. Kune mahombe akakura (zvichireva ≥16mm), akavhura U-akaumbwa kana kaviri U-shaped grooves anogona kushandiswa kugadzirisa dambudziko. Munguva yekuvharira welding, multi-pass welding inogona zvakare kushandiswa kudzikisa swing range. Idzi nzira dziri pamusoro dzinogamuchirwa mukugadzira welding, izvo zvisingaite chete shuwa yemukati mhando asiwo inova nechokwadi chakatsetseka uye chakarongeka weld bead.
Paunenge uchishanda J507 electrodes ye welding, kunze kwepamusoro pemaitiro ekugadzirisa matanho ekudzivirira mapores anogoneka, zvimwe zvinowanzoitika zvinodiwa hazvigoni kuregererwa. Semuyenzaniso: kuomesa welding tsvimbo kubvisa mvura nemafuta, kuona uye kugadzirisa groove, uye zvakakodzera grounding nzvimbo kudzivirira arc deflection kubva pakukonzera pores, etc. Chete nekudzora maitiro matanho zvichienderana nemaitiro echigadzirwa, tichava. kukwanisa kuderedza zvinobudirira uye kudzivirira kukanganisa kwepore.
Nguva yekutumira: Nov-01-2023
