Method for testing mechanical property of braze welding connector

Abstract

The invention relates to a method for testing a mechanical property of a braze welding connector. The method comprises the following steps: (1) preparing a T-shaped tensile sample; (2) preparing test equipment including an electronic universal testing machine, a clamp, a heating furnace, a temperature control system and a control system; (3) installing the T-shaped tensile sample; (4) testing the mechanical property of a T-shaped tensile sample connector in an environment of the room temperature; (5) testing the mechanical property of the T-shaped tensile sample connector in a high-temperature environment; (6) representing the mechanical property of the connector: integrating a load-displacement curve, dividing the area of a fractured surface to obtain fracture total energy, calculating interface fracture energy (refer to the specification) and a maximal load (refer to the specification) when in fracturing, wherein the interface fracture energy and the maximal load are main parameters representing the mechanical property of the tensile sample. The T-shaped connector sample conforming to the real structure stress situation is provided; the problem that the method for testing the mechanical property of the braze soldering plate-fin structure is in lack and the rest result is incorrect can be solved; the test method is simple, data can be automatically acquired, error in manual operation can be avoided, more efficiency in test can be achieved, and the test result is more accurate.

Description

technical field [0001] The invention belongs to the technical field of plate-fin structure brazing process manufacturing mechanics, and in particular relates to a sample design and testing method for testing the mechanical properties of brazing joints. Background technique [0002] The stainless steel plate-fin heat exchanger has the characteristics of compact structure, high heat exchange efficiency, high temperature resistance and corrosion resistance. At present, heat exchange technology is changing from large-scale to compact and miniaturized. Due to its high-efficiency and compact features, heat exchangers with plate-fin structures are becoming more and more popular in integrated high-temperature systems, and are widely used in nuclear power, Petroleum, chemical industry, aerospace, metallurgy, transportation and other fields. In the new generation of high-temperature gas-cooled reactors, the plate-fin structure is not only the most feasible form of heat exchange unit,...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the above problems and propose a method for testing the mechanical properties of brazed joints. On the basis of preparing tensile samples, design corresponding fixtures and apply electronic universal tests with heating furnaces, temperature control systems and data acquisition systems. The mechanical test system measures and records the load-displacement curve, and integrates it to obtain the total energy consumption. The maximum load at the time of crack initiation and the interface fracture energy of the weld are used as the main parameters to characterize the mechanical properties of the tensile sample, which solves the problem of brazing The lack of test methods for the mechanical properties of the plate-fin structure and the inaccurate test results; the sample design conforms to the actual structural force, the test method is simple, the data is automatically collected, and the error of human operation can be avoided, and the test results are accurate

Images