Filifilia o uelo meaAustenitic A102 ma J507 o o fautuaina mo uelo mo uelo o o le tutusa ituaiga o seāseeur lalolagi omea tetee u'amea filogia u'amea'a 7b{{}} 7d Austenitic A102 ma J507 o o fautuaina mo uelo o uelo o seāseo lalolagi laei tetee u'amea filoga uamea ma q235-a dissimilar steel 7b{6}}A102 uelo uelo tootoo o u'o maopoopo J507 uelo tootoo maopoopo, lautele filifili 3% 7B % 7B11 % 7D % 7D2 maopoopo tootoo pito i lalo % 2C le totoe maopoopo electrode fautuaina i filifili 4% 7b % 7B15% 7D % 7D0 maopoopo tootoo. Maopoopo electrode e tatau ona avea toniga luma maopoopo 2c A102 uelo tootoo ma J507 maopoopo tootoo faamago vevela o le masani e uiga i 150 tikeri , po o le tusa ai i le aiaiga o le electrode tusi lesona , e pei o maopoopo welder tatau ona tausia a mautinoa mamao mai le incubator % 2c ma le maopoopo tootoo le mafai le toe fai faamagoina.
Fa'atekinolosi i le fa'afefe 'a'o le'i fa'avae. O le ferrous long-lasting alloy steel e tele le fa'amoemoe e faigata, ma e faigofie ona fa'atauina atu le 'aiga faigata ma le malulu i le fa'a'aiga. O le mea lea, e tatau ona fa'atekinolosi i le fa'afefe 'a'o le'i fa'avae, ma o le vevela fa'atufugaga e masani ona taofi i le va o le 200 ~ 250 tikeri. O le va'aiga fa'atufugaga e faʻaaoga ai le afi oxyacetylene, ma o le afi micro carbon e faʻaaogaina i le taimi o le fa'atuputele. E tusa ai ma le mafiafia ma le dia o le puipui, e mafai ona fa'aaogaina se tasi po'o le to'afa o le va'aiga fa'aiga e fa'atekinolosi i le ala i le puipui e fa'atufuga lelei. O le lautele o le fa'atufugaga e i totonu o le va o le 3 mafiafia o le puipui i itu uma e lua o le groove, e masani i totonu o le va o le 50 ~ 100mm, ma o le la'ititi o le a le itiiti ifo i le 50mm. E mafai ona fua le vevela i le fa'aaogaina o se penitala fa'avae i le vevela.
The tack weldingThe number of welding spots is generally from 3 to 6. The length of welding spot is 10 ~ 30mm, and the height is 2 ~ 4mm. The welding specification for positioning welding is the same as that for formal welding.4. Number of welding layersThe welding adopts multi-layer and multi-pass welding.5. Interlayer temperatureDuring welding, the interlayer temperature shall be strictly controlled within the range of 200 ~ 250℃, and the interlayer temperature shall not be too high.6. Post weld heat treatmentIn order to reduce the cooling speed after welding and prevent quenching and cracking, after cooling to 250 ~ 300℃ after welding, immediately wrap the welded joint with asbestos cloth for self-cooling.7. Key points for welding7.1 working environmentOn-site welding, rain, relative humidity is greater than or equal to 90%, welding is prohibited.7.2 welding current selectionWelding current should be reduced appropriately according to the conventional welding specification, and the welding speed should not be too fast. It is generally recommended to control the current of A102 electrode and J507 electrode during welding at 90 ~ 150A, and the current of vertical welding and overhead welding should be correspondingly reduced.7.3 operation pointsWhen applying welding, should be two people butt welding, keep the two solder joints in a symmetrical position, the electrode shall not swing, and the use of short arc welding, narrow welding, multi-layer welding, generally each layer thickness should be equal to the electrode diameter.After welding each seam of each layer, hammer strike with a pneumatic shovel or hammer to reduce the welding stress.When welding, the temperature between layers should be strictly controlled. After welding, in order to reduce the cooling speed and prevent quenching and cracking, asbestos cloth should be used for insulation.
