Metal workpiece weld joint searching method

Abstract

The invention relates to a metal workpiece weld joint searching method which comprises the steps of (1) determining a weld joint existence area of a workpiece; (2) removing impurities in the weld joint existence area; and (3) observing and determining the position of a weld joint in the weld joint existence area. According to the metal workpiece weld joint searching method disclosed by the invention, the approximate position of the workpiece weld joint is determined firstly and is called as the weld joint existence area, then the impurities in the weld joint existence area are taken out, and the position of the weld joint in the weld joint existence area can be determined through directly observing or adopting tools such as a magnifying glass. On one hand, the method is fast and convenientto operate, and on the other hand, expensive equipment such as a metallographic microscope has no need to be adopted, so that the cost is effectively saved.

Description

technical field [0001] The invention relates to the technical field of boiler maintenance, in particular to a method for finding a weld seam of a metal workpiece. Background technique [0002] The welding seam is a seam formed by melting and connecting the welding rod and the metal at the joint by using the high temperature of the welding heat source. After the welding seam metal cools, the two weldments are connected as a whole. According to the shape of the weld metal and the different positions of the weldments, there are butt welds, fillet welds, plug welds and electric riveting welds. [0003] Butt welds are the most commonly used structural type in engineering, and generally have excess height. With the development of the national economy, more and more high-grade, high-parameter pressure vessels, pressure pipelines, and ultra-supercritical units are used. In order to improve the stress level of the welded joint and reduce the structural stress caused by the sudden ch...

AI Technical Summary

Problems solved by technology

This brings a lot of inconvenience to the later period, especially the non-destructive testing work in the maintenance process.

[0004] The weld seam is the weakest part of the workpiece. The non-destructive testing of the workpiece is mainly aimed at the weld seam, and the weld seam needs to be positioned during the inspection. If the position of the weld seam is unclear and the positioning is inaccurate, the non-destructive testing work cannot be carried out.

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