Method for determining types of steel by using Leeb hardness method

Abstract

The invention provides a method for determining the types of steel by using a Leeb hardness method. The method comprises the following steps: randomly selecting N steel members from a same batch of steel members as to-be-detected steel members; for each to-be-detected steel member, selecting M different positions on the outer surface of the to-be-detected steel member for grinding; for each polished part, performing K times of nondestructive testing by using a Leeb hardness method to obtain K Leeb hardness values; removing L Leeb hardness values from the K Leeb hardness values, and then calculating the Leeb hardness average value of the polished position according to all the remaining Leeb hardness values; according to the Leeb hardness average values of all the polished parts of the N to-be-detected steel members, conducting calculating to obtain a Leeb hardness total average value; and according to the Leeb hardness total average value and a preset hardness value interval, determining the steel type of the to-be-detected steel member. By applying the method, the accuracy of a detection result can be effectively improved, and the type of the steel can be accurately and conveniently determined through a nondestructive detection method.

Description

technical field [0001] The present application relates to the technical field of steel structure detection, in particular to a method for determining the type of steel by using the Leeb hardness method. Background technique [0002] Steel structure inspection is an important means of steel structure quality and safety control. Among them, steel strength or type inspection is an important index in steel structure inspection, which provides an important basis for project quality evaluation, safety evaluation and reinforcement transformation. [0003] In the prior art, when testing the type and strength of steel materials of an existing steel structure building, the methods used mainly include: a local damage test method and a non-destructive testing method. [0004] Among them, the local damage test method is to carry out the mechanical property test and chemical composition analysis of steel by sampling on site. Therefore, this partial failure test method has some drawbacks....

AI Technical Summary

Problems solved by technology

Sometimes the wrong type of steel will be used in component factory processing or construction, especially if the steel grade that should be used in the original design is Q345, but the steel grade used in the actual project is Q235, which will affect the safety of the overall structure. Lay a bigger security risk

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