| 摘要 |
A capilary electrical welding process for the repair of carbon steel of high, medium and low alloy, in the condition of tempere dor not; Hadfield steel; cast iron; nickel and its alloys; metallic covering and dissimilar bonds, to produce an appropriate microstructure in the welded bond without the need of post-welding thermal treatment, including, initially, the preparation of the base metal for welding upon the production of appropriate holes (7), followed by the use of a ferritic-austenitic covered electrode to produce the welding layers, wherein the first layer (1) is used to cover the face of the holes (7) and to execute the root pass; the second layer (2) allows the deposit of welding fillets with microstructure and mechanical properties appropriate for the application of equipment; in the third and fifth layers (3-5), one ferritic-austenitic covered electrode is used to compose the layer, but one austenitic electrode welding fillet may be used between the welding fillets of ferritic-austenitic deposits, but always beginning with one deposit of ferritic-austenitic deposit (AF) on both sides of the hole; the fourth layer (4) is similar to the second layer, however, the welding with one electrode with microstructure and mechanical properties superior to those of one electrode used in the second layer; and the sixth layer (6) is similar to the second, however, using one electrode with microstructure and mechanical properties superior to those of the electrode used in the fourth layer.
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