Device and method for detecting hydrogen embrittlement sensibility in high-strength steel surface treatment process

Abstract

The invention discloses a device and a method for detecting hydrogen embrittlement sensibility in a high-strength steel surface treatment process. The device comprises a high-strength steel hydrogen-charged test sample (3), an electrolyte tank (2) taking hydrochloric acid with concentration of 15-18% as an electrolyte (1), a stainless steel electrode (4), and a direct-current power supply (5) with adjustable voltage and time. The method comprises the following steps: charging hydrogen into the high-strength steel hydrogen-charged test sample by virtue of a hydrogen-charging device and by simulating a high-strength steel common surface treatment process, after the hydrogen-charging is completed, cleaning the high-strength steel hydrogen-charged test sample (3) and carrying out slow extension on the high-strength steel hydrogen-charged test sample (3) to test tensile strength and the maximum force, then carrying out fracture scanning morphology analysis on the high-strength steel hydrogen-charged test sample (3), and finally evaluating the hydrogen embrittlement sensibility of high-strength steel for the surface treatment process according to the analysis result. In which surface treatment process the high-strength steel is liable to generate hydrogen embrittlement can be judged, and in which surface treatment process the high-strength steel cannot be used or used with caution is determined, thus providing guidance for the high-strength steel surface treatment processes.

Description

technical field [0001] The invention relates to a detection method, in particular to a device and method for detecting the hydrogen embrittlement susceptibility of a high-strength steel surface treatment process, and belongs to the technical field of metal material analysis. Background technique [0002] Hydrogen embrittlement refers to the phenomenon of brittle fracture of metal materials due to the joint action of hydrogen and stress. With the development of the metallurgical industry and the individual needs of all walks of life, such as lightweight vehicles and increased bridge bearing capacity, the large-scale application of high-strength steel is becoming more and more common. In order to improve the service life of high-strength steel and improve its anti-corrosion performance, surface treatment must be carried out during the application of high-strength steel, such as pickling, phosphating, electroplating, electrophoresis and other processes, especially electrophores...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for detecting the hydrogen embrittlement sensitivity of the surface treatment process of high-strength steel for the problems that the surface treatment of high-strength steel is prone to hydrogen embrittlement, but there is no detection method for hydrogen embrittlement sensitivity of the surface treatment process of high-strength steel. device and method

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