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Joaloka mohloli o hloekileng oa matla, matla a fehloang ke moea a tsoetse pele ka potlako lilemong tsa morao tjena.Ka nts'etsopele ea lisebelisoa tsa matla a moea, lipoleiti tsa tšepe tse sebelisoang li ntse li tenya le ho feta, 'me tse ling li feta 100mm, e leng se fanang ka litlhoko tse phahameng tsa ho cheselletsa.Hajoale, Q355 kapa DH36 e sebelisoa haholo lisebelisoa tsa matla a moea, 'me mekhoa ea ho tjheseletsa hangata e khetha flux cored wire gas protection welding (FCAW) le submerged arc welding (SAW).
Ha ho etsoa tora ea turbine ea moea, mapetsong a matle a ka hlaha mothapong oa motsoako kapa sebakeng se amehileng ke mocheso ka mor'a ho chesetsoa ha foreimi ea lemati, 'me ha poleiti ea tšepe e le botenya, ho na le tšekamelo ea ho phatloha ho hoholo.Lebaka le bakoa ke superposition e akaretsang ea khatello ea maikutlo, mocheso oa tjheseletsa, tatellano ea tjheseletsa, hydrogen aggregation, joalo-joalo, kahoo e lokela ho rarolloa ho tsoa ho lihokelo tse ngata tse kang lisebelisoa tsa welding, tatellano ea welding, mocheso oa welding, taolo ea ts'ebetso, joalo-joalo.
1, Khetho ea lisebelisoa tsa welding
Hobane karolo ea welding e bohlokoa haholo, hoa hlokahala ho khetha lisebelisoa tsa ho tjheseletsa tse nang le litšila tse tlase, ho tiea ho hotle le ho hanyetsa crack, joalo ka GFL-71Ni ea rona (GB/T10045 T494T1-1 C1 A, AWS A5.20 E71T-1C). -J).
Ts'ebetso e tloaelehileng ea lihlahisoa tsa GFL-71Ni:
● Lintho tse fokolang haholo tsa lintho tse sa hloekang, P + S ≤0.012% (wt%) li ka laoloa.
● Excellent elongation plasticity, elongation ka mor'a khefu≥27%.
● Tšusumetso e matla e matla, -40 °C e ama matla a ho monya ≥ ho feta 100J.
● Mosebetsi o motle oa CTOD.
● Phallo ea haedrojene e nang le H5 kapa ka tlase ho moo.
2、 Welding process control
(1) Welding preheating le taolo inter-channel mocheso
Ha re bua ka litekanyetso tse amehang le boiphihlelo bo felletseng ba nako e fetileng, ho khothaletsoa ho khetha mocheso oa preheating le li-inter-channel:
● 20 ~ 38mm botenya, mocheso o futhumatsang o ka holimo ho 75 °C.
● 38 ~ 65mm botenya, mocheso o futhumatsang o ka holimo ho 100 °C.
● Botenya bo fetang 65mm, mocheso o futhumatsang o ka holimo ho 125°C.
Mariha, tahlehelo ea mocheso e lokela ho nahanoa, kahoo e lokela ho fetoloa ka 30 ~ 50 ° C motheong ona.
(2) The workpiece e lokela ho tsoela pele ho futhumatsoa nakong ea ts'ebetso ea ho cheselletsa ho boloka mocheso o lekaneng oa li-inter-channel
● 20 ~ 38mm botenya, ho kgothaletswa ho laola mocheso pakeng tsa dikanale 130 ~ 160 °C.
● 38 ~ 65mm botenya, ho kgothaletswa ho laola mocheso pakeng tsa dikanale 150 ~ 180 °C.
● Ho feta 65mm botenya, ho kgothaletswa ho laola mocheso pakeng tsa dikanale 170 ~ 200 °C.
Sesebelisoa sa ho lekanya mocheso se molemo ka ho fetisisa ho sebelisa thepa ea ho lekanya mocheso oa ho kopana, kapa pene e khethehileng ea ho lekanya mocheso.
3. Taolo ea litlhaloso tsa welding
| Welding terata Diameter | Liparamente tse khothalelitsoeng | Ho kenya mocheso |
| 1.2 limilimithara | 220-280A/26-30V 300mm/min | 1.1-2.0KJ/mm |
| 1.4 limilimithara | 230-300A/26-32V 300mm/min | 1.1-2.0KJ/mm |
Tlhokomeliso ea 1: Hona joale e nyenyane e lokela ho khethoa bakeng sa welding e ka tlaase, 'me sekoahelo sa ho tlatsa se ka ba seholo ka ho loketseng, empa ha sea lokela ho feta boleng bo khothalletsoang.
Tlhokomeliso ea 2: Bophara ba sefaha se le seng sa weld ha boa lokela ho feta 20mm, mme sefaha sa weld se lokela ho hlophisoa ho latela maemo a nnete.Ha groove e le bophara, ho lokela ho sebelisoa welding ea multipass, e leng molemo ho hloekisa lijo-thollo.
4. Welding tatelano taolo
Ho molemo ho sebelisa welding ea batho ba bangata bakeng sa li-welds tsa annular, tse ka fokotsang khatello ea kelello haholo, 'me batho ba 4 ba nang le symmetrical welding ba molemo ho feta batho ba 2 ba symmetrical welding.
5、 Ho tlosoa ha haedrojene bohareng ba tjheseletsa
Ho tlosoa ha haedrojene karolong e bohareng ke tekanyo e nkiloeng khahlanong le ho bokella haedrojene e ka senyehang ha ho chesoa lipoleiti tse teteaneng.Lipatlisiso li bontša hore phello e totobetse bakeng sa lipoleiti tse teteaneng tse kholo ho feta 70mm.Ts'ebetso ea ts'ebetso e tjena:
● Emisa ho cheseletsa hoo e ka bang 2/3 ea sefaha sohle.
● Dehydrogenation 250-300℃×2 ~ 3h.
● Tsoela pele ho cheseletsa ho fihlela ho phethoa ha haedrojene.
● Ka mor'a ho tjheseletsa, koahele ka k'hothone e sireletsang 'me butle-butle u pholile mocheso oa kamore.
6. Litaba tse ling tse hlokang ho hlokomeloa
● Pele li cheseletsa, li-bevel li lokela ho hloeka li be li hloeke.
● Boitšisinyo ba ho swing bo lokela ho qojoa kahohle kamoo ho ka khonehang.E kgothaletswa ho sebelisa tjheseletsa e otlolohileng bead le multilayer multi-pass welding.
● Bolelele ba katoloso ea terata e ka tlaase ea welding ha ea lokela ho feta 25mm.Haeba groove e tebile haholo, ka kopo khetha nozzle ea conical.
● Ka mor'a hore carbon planer e hloekisoe, 'mala oa tšepe o lokela ho belisoa pele o tsoela pele ho tjheseletsa.
Re na le mehlala e mengata ea ts'ebeliso ea lisebelisoa tsa welding tse sebelisoang indastering ea matla a moea, amohela ho botsa!
Nako ea poso: Nov-24-2022