QUALITY CONTROL OF RAILROAD TANK CAR WELDED JOINTS BY MAGNETOGRAPHIC METHOD

Abstract

PURPOSE. The article deals with the results of works on mechanization and automation of the technological processes of magnetic monitoring conducted in order to reduce the influence of a human factor on the reliability of non-destructive flaw detection and increase the labour productivity of critical flaw identification. METHODS. A magnetographic method using a magnetic tape as a sensitive element for flaw recording is proposed in order to improve the application efficiency of the non-destructive quality control of rolling stock parts with the complex shape of the monitored surface. RESULTS. A number of developments has been performed dealing with the control tools and technological documentation. They allow to simplify the magnetization and magnetic recording when conducting magnetic tape testing of large tanks, e.g. railroad tank cars. The novelty of technical solutions is confirmed by the author’s certificates and a patent. CONCLUSIONS. Application of the magnetographic monitoring with pulse magnetization by the developed methodology greatly simplifies technological operations and increases detectability of such critical flaws as cracks at their early stage.