High-temperature bending detection method of metal material

Abstract

The invention discloses a high-temperature bending detection method of metal material. The method can perform bending detection on the metal material under a high-temperature environment and obtain the high-temperature bending performance of the metal material. The method includes: manufacturing the metal material into bending samples, mounting a high-temperature-environment box on a universal tester, mounting a bending detection device in the high-temperature-environment box, performing high-temperature bending detection on the samples, and recording bending failure angles; measuring the size of the samples after the bending detection, and calculating bending deviation quantity, bending deviation rate and total bending deformation rate; measuring the thickness a and width b of the detected part of the rectangular sample after the rectangular sample is bent, and calculating width deformation rate and thickness deformation rate; measuring the diameter d of the detected part of the cylindrical sample after the cylindrical sample is bent, and calculating diameter deformation rate. By the method, the actual bending condition of the metal material in the high-temperature environment can be simulated, and accordingly the bending detection can comprehensively detect and reflect the bending performance of the metal material in the high-temperature environment.

Description

technical field [0001] The invention relates to the field of mechanical testing, in particular to a high-temperature bending testing method for metal materials Background technique [0002] The bending test is mainly used to determine the mechanical properties of the material under bending load. It is one of the basic methods of material mechanical performance testing. It is usually used to detect and compare the quality and performance of the heat treatment layer on the surface of the material. After the bending test, the surface of the sample is observed. With or without cracks. No cracks indicate that the sample is qualified, while cracks indicate that the sample is unqualified. [0003] Chinese patent application "Side Bending Test Method", publication number is CN101819113A; this invention patent discloses a side bending test method capable of testing the side bending performance of metal materials. First make a sample with a welded steel plate, then make the original...

AI Technical Summary

Problems solved by technology

The above-mentioned "bending detection device and detection method" does not involve high-temperature bending detection methods, and at the same time, it cannot comprehensively detect the mechanical properties of metal materials after bending

[0005] In industrial production, the bending test is usually carried out at room temperature, and there is no relevant report on the high-temperature bending test of metal materials.

However, some metal materials are used at high temperature, and the parameters obtained by using the general room temperature bending test to detect its bending performance will not be able to directly reflect the bending performance of the metal material at high temperature, so it is impossible to accurately judge whether the metal material meets the requirements of high temperature conditions. Working bending performance

As a result, unqualified metal materials may be applied to high-temperature bending working environments