Low temperature bending detection method of metal material

Abstract

The invention discloses a low temperature bending detection method of a metal material, being capable of simulating the metal material, carrying out bending detection on the metal material in low temperature environment and detecting to obtain the performances of the bent metal material. The method comprises the following steps: processing the metal material to prepare a bent sample, arranging a low temperature environment box on a universal testing machine, arranging a bending detection device in the box, carrying out low temperature bending detection on the sample, recording the bending failure angle, and calculating the total bending cross section rate, the width shrinkage and the thickness shrinkage of a rectangular sample and the diameter shrinkage of a circular sample. The method breaks limitation of detection of the performances of the metal material at room temperature, and can simulate the practical bending condition of the metal material in the low temperature environment in order to make the performances of the metal material, examined and reflected by the bending detection, be comprehensive.

Description

technical field [0001] The invention relates to the field of mechanical testing, in particular to a low-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 the low-temperature bending detection method, and at the same time, it cannot comprehensively detect the mechanical properties of metal materials after bending

[0005] In industrial production, bending tests are usually carried out at room temperature, and there are no relevant reports on low-temperature bending tests of metal materials.