نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
Accurate identification of steel grades is critical in industries such as oil, gas, and automotive, yet many workshops lack advanced analytical equipment. The spark test is a simple, low-cost, on-site method that offers a practical alternative. This study aims to distinguish three steel types—carbon steel A105, alloy steel 420, and stainless steel 316—based on an analysis of their spark patterns. A custom fixture with a spring mechanism was designed to apply a uniform grinding force, eliminating pressure-induced variations. The spark patterns generated by a high-speed grinding wheel were recorded by a fixed camera for further analysis. Three parameters—spark length, spread angle, and spark deviation angle—were measured after scaling in software. The results show that carbon content increases the spark spread angle and branching explosions, whereas chromium and nickel reduce the spark length and create a whitish color. Manganese intensifies yellow coloration. The measured spark lengths (after scaling) were 441 mm (316), 474 mm (A105), and 469 mm (420). The spread angles were 10.72° (316), 14.27° (A105), and 18.78° (420). These distinct patterns allow for the reliable discrimination of the three steels. The proposed fixture and quantitative parameters provide a reproducible, operator-independent spark test suitable for industrial environments.
کلیدواژهها English