Welding process of stainless steel medium plate

Abstract

The invention provides a welding process of a stainless steel medium plate, and belongs to the technical field of welding. The problem that an welding wire welded with an existing stainless steel medium plate is higher in cost is solved. The welding process of the stainless steel medium plate comprises the following steps that A, grooves and truncated edges of plates are machined, the plates are cleaned and polished, the plates are assembled in a butt joint manner, and the plates are positioned through spot welding; B, front face backing welding is conducted through K-TIG, and the truncated edges are subjected to self-melting without adding a welding wire through the large current of the K-TIG; C, a root gap between the two truncated edges is subjected to front face covering through submerged arc welding; D, groove areas are subjected to back face filling through submerged-arc welding; and E, submerged arc welding is adopted to conduct back face filling on the groove areas, and then submerged arc welding is adopted to conduct back face covering on the groove areas. The welding process of the stainless steel medium plate has the advantage of reducing the welding wire cost.

Description

technical field [0001] The invention belongs to the field of welding technology and relates to a welding process for stainless steel medium and thick plates. Background technique [0002] Butt welding of medium and thick plates is an important link in the manufacturing process of pressure vessels and steel structure products. The traditional welding method of this type of weld generally adopts a single V or X-shaped groove, and uses manual arc welding or gas shielded welding for backing , After submerged arc welding is performed on the front side, carbon gouging is used on the back side to clean the roots, and the oxide slag is polished by a grinder, and then the front side is submerged arc welding. This method of production and welding is inefficient. [0003] In response to the above problems, people have made various improvements, and some have applied for patents. For example, Chinese patent literature discloses a welding process for X-shaped grooves with unclear roots f...

AI Technical Summary

Problems solved by technology

However, in the welding process of this type, solid wire gas shielded welding / electrode arc welding / argon arc welding is used for welding when the front backing welding is performed, and a φ1.2mm solid welding wire is used. When backing welding, in order to make the two The sheets are welded and bonded as much as possible, the welding speed is 150-250mm / min, the welding speed is slow, the number of welding wires to be used is relatively large, and the cost of welding wires is high

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