Slag detachability evaluation test method and device of submerged arc welding agent

Abstract

The invention relates to the field of performance evaluation of a submerged arc welding agent, and particularly relates to slag detachability evaluation test method and a device of the submerged arc welding agent. The slag detachability evaluation test method of the submerged arc welding agent comprises the following steps of: setting an effective deslagging standard, determining a standard submerged-arc welding process, selecting a standard test steel plate, repeatedly carrying out a welding test on included angles of a pair of standard test steel plates from 00; increasing the included angles gradually until effective deslagging is achieved, and recording an angle at this moment, wherein the angle is a slag detachability index of the submerged arc welding agent to be evaluated. The slag detachability evaluation test device of the submerged arc welding agent comprises a base plate, a movable lifting support plate, a fixed support plate, a movable lateral support plate, a fixed lateral support plate and an angle adjusting screw rod. According to the slag detachability evaluation test method of the submerged arc welding agent, slag detachability of various welding agents in a real welding process can be intuitively reflected; understanding and applying of a welding operator on the slag detachability of the welding agent are improved, and design and development on the welding agent are also improved by a welding agent developer.

Description

technical field [0001] The invention relates to the field of submerged arc welding performance evaluation, in particular to a submerged arc welding slag removal test method and device. Background technique [0002] Submerged arc welding is widely used in large equipment, boilers, bridges, shipbuilding, energy, chemical industry due to its high welding production efficiency, no arc light, no spatter, clean environment, high degree of automation and easy to reduce the labor intensity of operators. Welding production in various manufacturing fields. In the submerged arc welding process, submerged arc flux is an indispensable welding material. It not only stabilizes the welding arc but also improves the weld metal properties of the weld metal during the welding process. At the same time, the flux is formed after melting. Molten welding slag covers the liquid molten pool to prevent oxygen, nitrogen and impurity gases in the air from entering the high-temperature weld metal to ac...

AI Technical Summary

Problems solved by technology

However, when the groove angle of the welded joint is too small, the welding slag formed by the flux is easy to be caught in the weld seam and is not easy to remove, forming a slag inclusion defect. If it cannot be effectively removed, it will become a safety hazard for the entire welded joint. Therefore, , slag removal is an important index to evaluate the performance of flux

At present, there is no quantifiable index to directly evaluate the slag removal performance. At present, when describing the flux, people often use the alkalinity index, which can only indirectly reflect the quality of the slag removal performance to a certain extent, and cannot It is directly and quantitatively described, therefore, establishing a method that can directly quantitatively describe the slag removal of flux is of great significance for the development of new submerged arc fluxes and the comparison and selection of different submerged arc fluxes

Images