Analysis of regulatory support for accreditation procedures in steel shot production
DOI:
https://doi.org/10.15802/tpm.2.2025.08Keywords:
steel shot, regulatory framework, microstructure, defects, particle size distribution, accreditationAbstract
Purpose. Analysis of DSTU 3184 requirements for spherical steel shot and heat-treated spherical steel shot in the context of ensuring production accreditation procedures. Methodology. The research material was manufactured by SE “STALZAVOD TAS” using the method of steel melting and pouring into rotary nozzles with subsequent atomization of the melt on a water curtain to form shot particles. Metallographic analysis was performed using a NEOPHOT-32 optical microscope. Findings. The analysis of DSTU 3184-95 requirements for spherical steel shot type was carried out with regard to its size distribution, microstructure, unacceptable defects, heat treatment, and chemical composition. It was established that the distribution of steel and cast-iron spherical shot into 10 nominal sizes specified by DSTU 3184 does not correspond to international standards for this type of product. According to DSTU 3184, the chemical composition of the shot is determined by the manufacturer, which decreases the level of regulatory control. The necessity of aligning the regulated microstructure of heat-treated steel shot with its chemical composition was identified. Requirements for unacceptable defects under DSTU 3184 include the ratio of maximum to minimum particle diameter, the area of shrinkage porosity, the length of the largest crack, and the area of the largest cavity; however, they do not take into account such typical defects for this product as gas pores and non-metallic inclusions. Originality. A comparative analysis of the requirements of national and international regulatory documents and technical specifications regarding permissible defect levels in steel shot was performed. The study revealed that DSTU 3184 provisions are inconsistent with modern requirements concerning the regulation of chemical composition and its compliance with the declared microstructure. Practical value. The revision and adaptation of DSTU 3184 regulatory requirements to current technical realities and international standards are substantiated as critical factors for maintaining the competitiveness of domestic products in both national and international markets.
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