A detection method for automobile girder plate

Abstract

The invention provides a detection method for an automobile girder. The detection method comprises the steps of performing tensile test on the automobile girder and detecting yield strength of the automobile girder, if the yield strength is not detected, tensile strength and elongation of the automobile girder are tested; if the tensile strength does not fit a first predetermined index and / or the elongation does not fit a second predetermined index, it is determined that a yield phenomenon exists in the automobile girder and the test is finished; and if the tensile strength fits the first predetermined index and / or the elongation fits the second predetermined index, a chemical composition test and a metallographic structure test are performed on the automobile girder. According to the detection method for the automobile girder provided by an embodiment of the invention, a determination problem when the yield phenomenon does not exist in tensile test of the automobile girder is effectively solved, tensile test results can be provided scientifically, rapidly and accurately, and mechanical properties of the automobile girder can be better controlled.

Description

technical field [0001] The invention relates to the technical field of automobile materials, and more particularly, the invention relates to a method for detecting automobile girder plates. Background technique [0002] At present, in the tensile test of the girder slab, some samples have obvious yield, and the test result can be judged whether the test result is qualified or not according to the standard; but some tensile samples have no obvious yield phenomenon, and the yield strength cannot be detected. There is no test method and judgment basis in GB / T3273-2005 "Hot-rolled steel plates and steel strips for automobile frame plates", and it is difficult to draw conclusions from the tensile test results. It has always been a problem that plagues physical and chemical experiments. For this situation, there is no relevant ready-made method to solve it. Contents of the invention [0003] The present invention aims to solve at least one of the above-mentioned technical probl...

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Problems solved by technology

[0002] At present, in the tensile test of girder slabs, some samples have obvious yield, and the test results can be judged to be qualified or not according to the standard; but some tensile samples have no obvious yield phenomenon, and the yield strength cannot be detected. There is no test method and judgment basis in GB / T3273-2005 "Hot-rolled steel plates and steel strips for automobile frame plates", and it is difficult to draw conclusions from the tensile test results

It has always been a problem that plagues physical and chemical experiments. For this situation, there is no relevant ready-made solution

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