КОНТРОЛЬ ЯКОСТІ ЗВАРЮВАННЯ В ПОЛЬОВИХ УМОВАХ

Abstract

Fast and high-quality repair of weapons in the field will be crucial in modern combat. Thus, quality control of welding of weapons in the field will be the main criterion in determining the degree of readiness of weapons for their intended use, after repairs in the field. Defects of welded joints have the greatest danger for the technical condition of weapons samples. The purpose of the article is to assess the main defects of welding in the field and analyze ways to detect them through quality control of welding. Defects lead to a decrease in the strength of the weld, to a violation of the tightness of the connection and to a decrease in the operational reliability of the sample of weapons. The conducted researches allowed revealing the main reasons of defects of welding. 2-3 methods of control of welded joints are usually used to determine the quality of welding in the field. These methods are selected from a variety of existing ones, taking into account the numerous initial data. Therefore, the main methods in the field, in our opinion, will be – visual quality control and ultrasonic quality control. These methods of control are considered the most accessible and efficient. At the same time, studies have shown that the main disadvantage of visual quality control is the human factor, which affects 100% of the results; low reliability of the obtained results, subjectivity; use only to search for large defects (not less than 0.1-0.2 mm); limited research only by visible part of the structure. Studies have shown that the main disadvantages of the ultrasonic quality control include: limited information about the defect; some difficulties when working with metals with coarse-grained structure, which arise due to scattering and attenuation of waves; the need for preliminary preparation of the seam surface. The problems arising at quality control of welding in field conditions are revealed. Indicators of quality of welding of details, the main defects of welding and the reasons of their occurrence are shown. The comparative analysis of methods of visual control and ultrasonic control of quality of welding in field conditions is carried out. The problems and peculiarities of control of welding of products in field conditions revealed in the article should be taken into account in the process of development of operational, normative and technical documentation and personnel training. Keywords: quality of welded joints, defects, quality control.