Patent ID: 7786407

Claim:
An electric welding process for high and low alloy, hardenable, hardened and bi-metals steel, for obtaining specific textures, the process comprising the steps of: (A) preparing a work piece with a root, having a first side and a second side, to be welded by producing chamfers of a shape selected for the group consisting of: X-shape, U-shape and V-shape; the shape of the chamfer depending on the thickness of the work piece and on the area to be welded, and (B) welding the chamfered work piece using electrodes of specific chemical characteristics, enabling the welding of the high and low alloy, hardenable, hardened and bi-metals steel; the welding comprising the steps of: (i) in a first layer, coating the first side and the second side of the chamfer and the root with an adequate weld crystallization electrode deposited for obtaining an austenite and ferrite texture, with microstructures/crystallizations doting all parts fixing them with the same electrode; (ii) in a second layer, using an adequate type of welding electrode deposited for obtaining a pearlite or a pearlite plus troostite texture; (iii) in a third layer, using an adequate type of welding electrode deposited for obtaining an austenite texture, corresponding to only one characteristic of the texture of the first layer; (iv) in a fourth layer, using an adequate type of welding electrode deposited for obtaining a sorbite plus bainite texture; (v) in a fifth layer, using an adequate type of welding electrode deposited for obtaining an austenite plus ferrite texture, corresponding to the repetition of the structure of the first layer, and (vi) in a sixth layer, using an adequate type of welding electrode deposited for obtaining a bainite texture, wherein when only one side of the work piece is welded, the chamfer is of a shape selected for the group consisting of: V-shape and U-shape; and when both sides are welded, the chamfer is of a X-shape, creating the V-shape on both sides, giving the X-shape chamfer aspect, and wherein electrodes of specific chemical characteristics are used to obtain specific textures matching desired microstructures/crystallizations for each layer when the weld is deposited on a base portion material of the work piece, allowing the welding of high and low alloys, hardenable or hardened steels, and wherein the types of electrodes depending on the types of microstructures/crystallizations of the weld intended to be produced, and wherein when starting with a deposit of austenite and ferrite to the layers said microstructure/crystallization produced in each layer will present a weld stronger than the material of the base portion of the work piece, and wherein choosing the correct electrodes types for the purpose of the work piece to be welded, and wherein when using the work piece for static or dynamic efforts, choosing the correct electrodes types for the purpose and group type of the work piece to be welded.