Railway technics

The most widespread spring of the railway technics is the coiled spring for the bogie cushioning. According to the standard, a railcar service life is 32 years. So long must be the spring service life. In view of the fact that the technologies used by the springs manufacturers cannot provide this, in the design documentation with the design load service life of 500 000 loading cycles is stipulated. A drawback of modern springs used nowadays is camber, which results in coils impacts and shock loads on the frame cause its successive destruction and premature failure of a spring.Springs manufactured using the technology, which forms in material nanosized structure, feature no in-service camber, retain permanent clearance between coils, thus providing no impacting of coils, operate with no failure with stress increased by 30-40%, thus leading to service life increased by hundreds of times when calculating the working stress.These spring features allow to create alternative resource-saving design.