Analysis of mechanical property variation of different length M10 bolts
The use of fasteners in various industries is due to their simplicity and reliability. From practical experience, it has been revealed that the most frequently used bolt is the M10 of a wide size range in length. In the manufacture of various lengths bolts, the values of their mechanical properties remain unchanged. The revealed variation in the mechanical properties of various lengths bolts necessitated the study of its causes. With the selected complex of factors, a statistical analysis of factors influence on tensile strength, tensile strength on a slanting puck and hardness of finished bolts was carried out. The presented results of the study suggested that the cause of mechanical properties scatter of bolts with different lengths is the variation of the initial mechanical and operational characteristics of the rolled stock along its length.