Welding repair method for ship castings

Abstract

The invention discloses a marine casting soldering method. The method comprises the following steps of a preparing stage, i.e. selecting a welding strip; forming a welding seam beveled edge, i.e. forming an opened welding seam beveled edge, removing a crack source, and meanwhile making the two ends of the crack source arc-shaped; welding a welding seam, i.e. welding the welding seam by using the baked welding strip of which the model is E5015 and the diameter is 4mm, wherein an electrode manipulation way is a reciprocating way as well as a swinging way, and pre-heating the welding seam and fully filling the melting side of the welding seam in a reciprocating way, wherein the swinging way can promote the fusion of the edge of the welding seam; and performing oil quenching through butter. The welding strip is selected and processed, meanwhile the corresponding electrode manipulation way is adopted to weld the welding seam, the key point is that the oil quenching way is adopted, and a casting is soldered by an ordinary welding strip. The method is low in soldering cost, good in soldering effect and convenient to operate, and does not easily fail, and the soldering time is shortened, so that construction is guaranteed to be performed orderly.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a welding repair method for ship castings. Background technique [0002] The structural design of the ship is rigorous, and there are many cast iron welding components, which are easy to cause some defects during cast iron welding. Especially for large castings, with the help of simulated casting, although most of the defects have been reduced, due to actual operation errors and the difficulty of controlling the high temperature molten steel, various defects, such as cracks, etc., will affect the castings. performance. In order to repair these defects, welding repair is generally used to repair defects, and welding repair is also the most common and convenient repair method. [0003] In the prior art, two repair welding processes for cast iron welding, hot repair and cold repair for cast iron, are mainly used. Cast iron hot repair is often restricted by factors such as the weldi...

AI Technical Summary

Problems solved by technology

[0004] For the above two processes, due to their high requirements on technical quality and equipment, they are labor-intensive and time-consuming, and the cost is relatively high. When key equipment is damaged, it will also cause shutdown and production, causing losses to the enterprise.